From 6400ba89234dd2edcda597261e6f33fba27205f4 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 22:13:10 +0700 Subject: [PATCH 01/84] spec 1731: open the Modules / imports test panel Audit the 12 flat files plus test_import/, test_importlib/, test_module/ against CPython 3.14.5 under the 1726 zero-skip bridge, and lay out a phased plan: os.altsep + module dir() surface first, then the pure-Python stdlib modules (modulefinder, pyclbr, zipapp), frozen modules, the runpy residual, the directory suites, and finally the PEP 554 interpreters. --- .../specs/1700/1731_modules_imports_panel.md | 83 +++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 website/docs/specs/1700/1731_modules_imports_panel.md diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md new file mode 100644 index 00000000..bae2b82f --- /dev/null +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -0,0 +1,83 @@ +--- +id: "1731" +slug: 1731 +title: "1731: Modules / imports test panel — CPython 3.14 parity port" +sidebar_label: "1731 Modules imports panel" +description: "Audit and port of the Modules/imports test panel from spec 1700 (12 files plus test_import/, test_importlib/, test_module/) against CPython 3.14 under the spec 1726 zero-skip bridge." +--- + +## Status + +Active. Branch `feat/v0.13.5-spec-modules-imports`. + +Run under the [[1726]] bridge so every `@cpython_only` test executes on gopy +instead of being skipped. "No skip" means parity with CPython: if CPython +skips a test on this platform, gopy skips it too; everything else must pass. + +## Goal + +Drive every test in the spec 1700 Modules / imports panel to CPython 3.14 +parity via faithful CPython ports. No shims, no partial slices: when a gate +lands on a subsystem, port every function in that subsystem from CPython as the +single source of truth. + +Sources of truth: `$HOME/cpython-314/`. Every cited function is read from that +tree before porting. + +## Panel + +The panel is the 12 flat files plus the three directory suites. CPython 3.14.5 +runs all of the non-interpreter files green. + +| Test | CPython 3.14.5 | gopy baseline (audit 2026-06-14) | +| --- | --- | --- | +| `test_module/` (dir) | OK | to re-audit | +| `test_import/` (dir) | OK | to re-audit | +| `test_importlib/` (dir) | OK | to re-audit | +| `test_modulefinder` | OK | `ModuleNotFoundError: modulefinder` | +| `test_pkg` | OK | AssertionError: module `dir()` missing `__cached__`/`__doc__`/`__loader__`/`__spec__` | +| `test_pkgutil` | OK | `AttributeError: os has no attribute altsep` | +| `test_pyclbr` | OK | `ModuleNotFoundError: pyclbr` | +| `test_pkgimport` | (covered by `test_import/`) | no flat file | +| `test_runpy` | OK | 1 ERROR (`test_run_package_init_exceptions`) | +| `test_frozen` | OK | `ModuleNotFoundError: __hello__` (frozen module) | +| `test_zipimport` | OK | `AttributeError: os has no attribute altsep` | +| `test_zipimport_support` | OK | `AttributeError: os has no attribute altsep` | +| `test_zipapp` | OK | `ModuleNotFoundError: zipapp` | +| `test__interpchannels` | PEP 554 | deferred (see below) | +| `test__interpreters` | PEP 554 | deferred (`_interpreters.run_string` missing) | + +## Plan + +Phased, smallest-blast-radius first. Re-audit after each phase against +CPython 3.14.5 (counts and `-v` lists). + +- **P1 — `os.altsep` and the module namespace surface.** `os.altsep` is `None` + on POSIX; its absence blocks `test_pkgutil`, `test_zipimport`, + `test_zipimport_support`. The `test_pkg` `dir()` gap is a module-object + attribute surface issue (`__cached__`, `__doc__`, `__loader__`, `__spec__`). + Port these first. +- **P2 — pure-Python stdlib modules.** `modulefinder`, `pyclbr`, `zipapp` are + pure-Python `Lib/*.py`; vendor them and whatever import-machinery they lean + on. Confirm they run under gopy's import system. +- **P3 — frozen modules.** `test_frozen` needs `__hello__` and the frozen + module table. Port the frozen-module surface from CPython. +- **P4 — `test_runpy` residual.** Single ERROR in + `test_run_package_init_exceptions`; port the package-init exception path. +- **P5 — directory suites.** Re-audit `test_import/`, `test_importlib/`, + `test_module/` against CPython and close residuals. +- **P6 — interpreters.** `test__interpreters` / `test__interpchannels` are + PEP 554 subinterpreters. Match CPython's behaviour: if CPython skips on this + build, gopy skips; otherwise port the `_interpreters` surface the tests reach. + +## Checklist + +- [ ] P1: `os.altsep` +- [ ] P1: module-object `dir()` surface (`__cached__`, `__doc__`, `__loader__`, `__spec__`) for `test_pkg` +- [ ] P2: vendor `modulefinder` +- [ ] P2: vendor `pyclbr` +- [ ] P2: vendor `zipapp` +- [ ] P3: frozen `__hello__` + frozen module table for `test_frozen` +- [ ] P4: `test_runpy` package-init exception path +- [ ] P5: re-audit `test_import/`, `test_importlib/`, `test_module/` +- [ ] P6: `test__interpreters` / `test__interpchannels` parity with CPython skip/run From d42b1b2f543cd232a216bb42225645240cacdef4 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 22:15:22 +0700 Subject: [PATCH 02/84] os: expose os.altsep (None on POSIX, '/' on Windows) The os module published sep/extsep/pathsep but not altsep, so any code doing os.altsep raised AttributeError. test_pkgutil, test_zipimport and test_zipimport_support all reach for it through ntpath/posixpath. Add it to the module constants, matching CPython (None on POSIX, '/' on nt). --- module/os/module.go | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/module/os/module.go b/module/os/module.go index dcbbe197..7d18fbd9 100644 --- a/module/os/module.go +++ b/module/os/module.go @@ -299,10 +299,14 @@ func buildOS() (*objects.Module, error) { linesep := "\n" pathsep := ":" osName := "posix" + // altsep is the alternate path separator: None on POSIX, '/' on Windows. + // CPython: Modules/posixmodule.c / Lib/ntpath.py:altsep + altsep := objects.None() if runtime.GOOS == "windows" { linesep = "\r\n" pathsep = ";" osName = "nt" + altsep = objects.NewStr("/") } entries := []struct { @@ -310,6 +314,7 @@ func buildOS() (*objects.Module, error) { val objects.Object }{ {"sep", objects.NewStr(sep)}, + {"altsep", altsep}, {"extsep", objects.NewStr(".")}, {"pardir", objects.NewStr("..")}, {"curdir", objects.NewStr(".")}, From 4540eff9d41b2a108bb6465e0fba606e67b5ce21 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 22:16:29 +0700 Subject: [PATCH 03/84] stdlib: vendor modulefinder, pyclbr and zipapp from CPython 3.14 All three are pure-Python Lib modules the import panel reaches for, and all three import cleanly under gopy. test_modulefinder, test_pyclbr and test_zipapp now get past the ModuleNotFoundError and surface the real gaps (importlib.machinery.PathFinder, test_importlib package, io __class__) tracked as follow-ups. --- stdlib/modulefinder.py | 671 +++++++++++++++++++++++++++++++++++++++++ stdlib/pyclbr.py | 314 +++++++++++++++++++ stdlib/zipapp.py | 231 ++++++++++++++ 3 files changed, 1216 insertions(+) create mode 100644 stdlib/modulefinder.py create mode 100644 stdlib/pyclbr.py create mode 100644 stdlib/zipapp.py diff --git a/stdlib/modulefinder.py b/stdlib/modulefinder.py new file mode 100644 index 00000000..ac478ee7 --- /dev/null +++ b/stdlib/modulefinder.py @@ -0,0 +1,671 @@ +"""Find modules used by a script, using introspection.""" + +import dis +import importlib._bootstrap_external +import importlib.machinery +import marshal +import os +import io +import sys + +# Old imp constants: + +_SEARCH_ERROR = 0 +_PY_SOURCE = 1 +_PY_COMPILED = 2 +_C_EXTENSION = 3 +_PKG_DIRECTORY = 5 +_C_BUILTIN = 6 +_PY_FROZEN = 7 + +# Modulefinder does a good job at simulating Python's, but it can not +# handle __path__ modifications packages make at runtime. Therefore there +# is a mechanism whereby you can register extra paths in this map for a +# package, and it will be honored. + +# Note this is a mapping is lists of paths. +packagePathMap = {} + +# A Public interface +def AddPackagePath(packagename, path): + packagePathMap.setdefault(packagename, []).append(path) + +replacePackageMap = {} + +# This ReplacePackage mechanism allows modulefinder to work around +# situations in which a package injects itself under the name +# of another package into sys.modules at runtime by calling +# ReplacePackage("real_package_name", "faked_package_name") +# before running ModuleFinder. + +def ReplacePackage(oldname, newname): + replacePackageMap[oldname] = newname + + +def _find_module(name, path=None): + """An importlib reimplementation of imp.find_module (for our purposes).""" + + # It's necessary to clear the caches for our Finder first, in case any + # modules are being added/deleted/modified at runtime. In particular, + # test_modulefinder.py changes file tree contents in a cache-breaking way: + + importlib.machinery.PathFinder.invalidate_caches() + + spec = importlib.machinery.PathFinder.find_spec(name, path) + + if spec is None: + raise ImportError("No module named {name!r}".format(name=name), name=name) + + # Some special cases: + + if spec.loader is importlib.machinery.BuiltinImporter: + return None, None, ("", "", _C_BUILTIN) + + if spec.loader is importlib.machinery.FrozenImporter: + return None, None, ("", "", _PY_FROZEN) + + file_path = spec.origin + + if spec.loader.is_package(name): + return None, os.path.dirname(file_path), ("", "", _PKG_DIRECTORY) + + if isinstance(spec.loader, importlib.machinery.SourceFileLoader): + kind = _PY_SOURCE + + elif isinstance( + spec.loader, ( + importlib.machinery.ExtensionFileLoader, + importlib.machinery.AppleFrameworkLoader, + ) + ): + kind = _C_EXTENSION + + elif isinstance(spec.loader, importlib.machinery.SourcelessFileLoader): + kind = _PY_COMPILED + + else: # Should never happen. + return None, None, ("", "", _SEARCH_ERROR) + + file = io.open_code(file_path) + suffix = os.path.splitext(file_path)[-1] + + return file, file_path, (suffix, "rb", kind) + + +class Module: + + def __init__(self, name, file=None, path=None): + self.__name__ = name + self.__file__ = file + self.__path__ = path + self.__code__ = None + # The set of global names that are assigned to in the module. + # This includes those names imported through starimports of + # Python modules. + self.globalnames = {} + # The set of starimports this module did that could not be + # resolved, ie. a starimport from a non-Python module. + self.starimports = {} + + def __repr__(self): + s = "Module(%r" % (self.__name__,) + if self.__file__ is not None: + s = s + ", %r" % (self.__file__,) + if self.__path__ is not None: + s = s + ", %r" % (self.__path__,) + s = s + ")" + return s + +class ModuleFinder: + + def __init__(self, path=None, debug=0, excludes=None, replace_paths=None): + if path is None: + path = sys.path + self.path = path + self.modules = {} + self.badmodules = {} + self.debug = debug + self.indent = 0 + self.excludes = excludes if excludes is not None else [] + self.replace_paths = replace_paths if replace_paths is not None else [] + self.processed_paths = [] # Used in debugging only + + def msg(self, level, str, *args): + if level <= self.debug: + for i in range(self.indent): + print(" ", end=' ') + print(str, end=' ') + for arg in args: + print(repr(arg), end=' ') + print() + + def msgin(self, *args): + level = args[0] + if level <= self.debug: + self.indent = self.indent + 1 + self.msg(*args) + + def msgout(self, *args): + level = args[0] + if level <= self.debug: + self.indent = self.indent - 1 + self.msg(*args) + + def run_script(self, pathname): + self.msg(2, "run_script", pathname) + with io.open_code(pathname) as fp: + stuff = ("", "rb", _PY_SOURCE) + self.load_module('__main__', fp, pathname, stuff) + + def load_file(self, pathname): + dir, name = os.path.split(pathname) + name, ext = os.path.splitext(name) + with io.open_code(pathname) as fp: + stuff = (ext, "rb", _PY_SOURCE) + self.load_module(name, fp, pathname, stuff) + + def import_hook(self, name, caller=None, fromlist=None, level=-1): + self.msg(3, "import_hook", name, caller, fromlist, level) + parent = self.determine_parent(caller, level=level) + q, tail = self.find_head_package(parent, name) + m = self.load_tail(q, tail) + if not fromlist: + return q + if m.__path__: + self.ensure_fromlist(m, fromlist) + return None + + def determine_parent(self, caller, level=-1): + self.msgin(4, "determine_parent", caller, level) + if not caller or level == 0: + self.msgout(4, "determine_parent -> None") + return None + pname = caller.__name__ + if level >= 1: # relative import + if caller.__path__: + level -= 1 + if level == 0: + parent = self.modules[pname] + assert parent is caller + self.msgout(4, "determine_parent ->", parent) + return parent + if pname.count(".") < level: + raise ImportError("relative importpath too deep") + pname = ".".join(pname.split(".")[:-level]) + parent = self.modules[pname] + self.msgout(4, "determine_parent ->", parent) + return parent + if caller.__path__: + parent = self.modules[pname] + assert caller is parent + self.msgout(4, "determine_parent ->", parent) + return parent + if '.' in pname: + i = pname.rfind('.') + pname = pname[:i] + parent = self.modules[pname] + assert parent.__name__ == pname + self.msgout(4, "determine_parent ->", parent) + return parent + self.msgout(4, "determine_parent -> None") + return None + + def find_head_package(self, parent, name): + self.msgin(4, "find_head_package", parent, name) + if '.' in name: + i = name.find('.') + head = name[:i] + tail = name[i+1:] + else: + head = name + tail = "" + if parent: + qname = "%s.%s" % (parent.__name__, head) + else: + qname = head + q = self.import_module(head, qname, parent) + if q: + self.msgout(4, "find_head_package ->", (q, tail)) + return q, tail + if parent: + qname = head + parent = None + q = self.import_module(head, qname, parent) + if q: + self.msgout(4, "find_head_package ->", (q, tail)) + return q, tail + self.msgout(4, "raise ImportError: No module named", qname) + raise ImportError("No module named " + qname) + + def load_tail(self, q, tail): + self.msgin(4, "load_tail", q, tail) + m = q + while tail: + i = tail.find('.') + if i < 0: i = len(tail) + head, tail = tail[:i], tail[i+1:] + mname = "%s.%s" % (m.__name__, head) + m = self.import_module(head, mname, m) + if not m: + self.msgout(4, "raise ImportError: No module named", mname) + raise ImportError("No module named " + mname) + self.msgout(4, "load_tail ->", m) + return m + + def ensure_fromlist(self, m, fromlist, recursive=0): + self.msg(4, "ensure_fromlist", m, fromlist, recursive) + for sub in fromlist: + if sub == "*": + if not recursive: + all = self.find_all_submodules(m) + if all: + self.ensure_fromlist(m, all, 1) + elif not hasattr(m, sub): + subname = "%s.%s" % (m.__name__, sub) + submod = self.import_module(sub, subname, m) + if not submod: + raise ImportError("No module named " + subname) + + def find_all_submodules(self, m): + if not m.__path__: + return + modules = {} + # 'suffixes' used to be a list hardcoded to [".py", ".pyc"]. + # But we must also collect Python extension modules - although + # we cannot separate normal dlls from Python extensions. + suffixes = [] + suffixes += importlib.machinery.EXTENSION_SUFFIXES[:] + suffixes += importlib.machinery.SOURCE_SUFFIXES[:] + suffixes += importlib.machinery.BYTECODE_SUFFIXES[:] + for dir in m.__path__: + try: + names = os.listdir(dir) + except OSError: + self.msg(2, "can't list directory", dir) + continue + for name in names: + mod = None + for suff in suffixes: + n = len(suff) + if name[-n:] == suff: + mod = name[:-n] + break + if mod and mod != "__init__": + modules[mod] = mod + return modules.keys() + + def import_module(self, partname, fqname, parent): + self.msgin(3, "import_module", partname, fqname, parent) + try: + m = self.modules[fqname] + except KeyError: + pass + else: + self.msgout(3, "import_module ->", m) + return m + if fqname in self.badmodules: + self.msgout(3, "import_module -> None") + return None + if parent and parent.__path__ is None: + self.msgout(3, "import_module -> None") + return None + try: + fp, pathname, stuff = self.find_module(partname, + parent and parent.__path__, parent) + except ImportError: + self.msgout(3, "import_module ->", None) + return None + + try: + m = self.load_module(fqname, fp, pathname, stuff) + finally: + if fp: + fp.close() + if parent: + setattr(parent, partname, m) + self.msgout(3, "import_module ->", m) + return m + + def load_module(self, fqname, fp, pathname, file_info): + suffix, mode, type = file_info + self.msgin(2, "load_module", fqname, fp and "fp", pathname) + if type == _PKG_DIRECTORY: + m = self.load_package(fqname, pathname) + self.msgout(2, "load_module ->", m) + return m + if type == _PY_SOURCE: + co = compile(fp.read(), pathname, 'exec') + elif type == _PY_COMPILED: + try: + data = fp.read() + importlib._bootstrap_external._classify_pyc(data, fqname, {}) + except ImportError as exc: + self.msgout(2, "raise ImportError: " + str(exc), pathname) + raise + co = marshal.loads(memoryview(data)[16:]) + else: + co = None + m = self.add_module(fqname) + m.__file__ = pathname + if co: + if self.replace_paths: + co = self.replace_paths_in_code(co) + m.__code__ = co + self.scan_code(co, m) + self.msgout(2, "load_module ->", m) + return m + + def _add_badmodule(self, name, caller): + if name not in self.badmodules: + self.badmodules[name] = {} + if caller: + self.badmodules[name][caller.__name__] = 1 + else: + self.badmodules[name]["-"] = 1 + + def _safe_import_hook(self, name, caller, fromlist, level=-1): + # wrapper for self.import_hook() that won't raise ImportError + if name in self.badmodules: + self._add_badmodule(name, caller) + return + try: + self.import_hook(name, caller, level=level) + except ImportError as msg: + self.msg(2, "ImportError:", str(msg)) + self._add_badmodule(name, caller) + except SyntaxError as msg: + self.msg(2, "SyntaxError:", str(msg)) + self._add_badmodule(name, caller) + else: + if fromlist: + for sub in fromlist: + fullname = name + "." + sub + if fullname in self.badmodules: + self._add_badmodule(fullname, caller) + continue + try: + self.import_hook(name, caller, [sub], level=level) + except ImportError as msg: + self.msg(2, "ImportError:", str(msg)) + self._add_badmodule(fullname, caller) + + def scan_opcodes(self, co): + # Scan the code, and yield 'interesting' opcode combinations + for name in dis._find_store_names(co): + yield "store", (name,) + for name, level, fromlist in dis._find_imports(co): + if level == 0: # absolute import + yield "absolute_import", (fromlist, name) + else: # relative import + yield "relative_import", (level, fromlist, name) + + def scan_code(self, co, m): + code = co.co_code + scanner = self.scan_opcodes + for what, args in scanner(co): + if what == "store": + name, = args + m.globalnames[name] = 1 + elif what == "absolute_import": + fromlist, name = args + have_star = 0 + if fromlist is not None: + if "*" in fromlist: + have_star = 1 + fromlist = [f for f in fromlist if f != "*"] + self._safe_import_hook(name, m, fromlist, level=0) + if have_star: + # We've encountered an "import *". If it is a Python module, + # the code has already been parsed and we can suck out the + # global names. + mm = None + if m.__path__: + # At this point we don't know whether 'name' is a + # submodule of 'm' or a global module. Let's just try + # the full name first. + mm = self.modules.get(m.__name__ + "." + name) + if mm is None: + mm = self.modules.get(name) + if mm is not None: + m.globalnames.update(mm.globalnames) + m.starimports.update(mm.starimports) + if mm.__code__ is None: + m.starimports[name] = 1 + else: + m.starimports[name] = 1 + elif what == "relative_import": + level, fromlist, name = args + if name: + self._safe_import_hook(name, m, fromlist, level=level) + else: + parent = self.determine_parent(m, level=level) + self._safe_import_hook(parent.__name__, None, fromlist, level=0) + else: + # We don't expect anything else from the generator. + raise RuntimeError(what) + + for c in co.co_consts: + if isinstance(c, type(co)): + self.scan_code(c, m) + + def load_package(self, fqname, pathname): + self.msgin(2, "load_package", fqname, pathname) + newname = replacePackageMap.get(fqname) + if newname: + fqname = newname + m = self.add_module(fqname) + m.__file__ = pathname + m.__path__ = [pathname] + + # As per comment at top of file, simulate runtime __path__ additions. + m.__path__ = m.__path__ + packagePathMap.get(fqname, []) + + fp, buf, stuff = self.find_module("__init__", m.__path__) + try: + self.load_module(fqname, fp, buf, stuff) + self.msgout(2, "load_package ->", m) + return m + finally: + if fp: + fp.close() + + def add_module(self, fqname): + if fqname in self.modules: + return self.modules[fqname] + self.modules[fqname] = m = Module(fqname) + return m + + def find_module(self, name, path, parent=None): + if parent is not None: + # assert path is not None + fullname = parent.__name__+'.'+name + else: + fullname = name + if fullname in self.excludes: + self.msgout(3, "find_module -> Excluded", fullname) + raise ImportError(name) + + if path is None: + if name in sys.builtin_module_names: + return (None, None, ("", "", _C_BUILTIN)) + + path = self.path + + return _find_module(name, path) + + def report(self): + """Print a report to stdout, listing the found modules with their + paths, as well as modules that are missing, or seem to be missing. + """ + print() + print(" %-25s %s" % ("Name", "File")) + print(" %-25s %s" % ("----", "----")) + # Print modules found + keys = sorted(self.modules.keys()) + for key in keys: + m = self.modules[key] + if m.__path__: + print("P", end=' ') + else: + print("m", end=' ') + print("%-25s" % key, m.__file__ or "") + + # Print missing modules + missing, maybe = self.any_missing_maybe() + if missing: + print() + print("Missing modules:") + for name in missing: + mods = sorted(self.badmodules[name].keys()) + print("?", name, "imported from", ', '.join(mods)) + # Print modules that may be missing, but then again, maybe not... + if maybe: + print() + print("Submodules that appear to be missing, but could also be", end=' ') + print("global names in the parent package:") + for name in maybe: + mods = sorted(self.badmodules[name].keys()) + print("?", name, "imported from", ', '.join(mods)) + + def any_missing(self): + """Return a list of modules that appear to be missing. Use + any_missing_maybe() if you want to know which modules are + certain to be missing, and which *may* be missing. + """ + missing, maybe = self.any_missing_maybe() + return missing + maybe + + def any_missing_maybe(self): + """Return two lists, one with modules that are certainly missing + and one with modules that *may* be missing. The latter names could + either be submodules *or* just global names in the package. + + The reason it can't always be determined is that it's impossible to + tell which names are imported when "from module import *" is done + with an extension module, short of actually importing it. + """ + missing = [] + maybe = [] + for name in self.badmodules: + if name in self.excludes: + continue + i = name.rfind(".") + if i < 0: + missing.append(name) + continue + subname = name[i+1:] + pkgname = name[:i] + pkg = self.modules.get(pkgname) + if pkg is not None: + if pkgname in self.badmodules[name]: + # The package tried to import this module itself and + # failed. It's definitely missing. + missing.append(name) + elif subname in pkg.globalnames: + # It's a global in the package: definitely not missing. + pass + elif pkg.starimports: + # It could be missing, but the package did an "import *" + # from a non-Python module, so we simply can't be sure. + maybe.append(name) + else: + # It's not a global in the package, the package didn't + # do funny star imports, it's very likely to be missing. + # The symbol could be inserted into the package from the + # outside, but since that's not good style we simply list + # it missing. + missing.append(name) + else: + missing.append(name) + missing.sort() + maybe.sort() + return missing, maybe + + def replace_paths_in_code(self, co): + new_filename = original_filename = os.path.normpath(co.co_filename) + for f, r in self.replace_paths: + if original_filename.startswith(f): + new_filename = r + original_filename[len(f):] + break + + if self.debug and original_filename not in self.processed_paths: + if new_filename != original_filename: + self.msgout(2, "co_filename %r changed to %r" \ + % (original_filename,new_filename,)) + else: + self.msgout(2, "co_filename %r remains unchanged" \ + % (original_filename,)) + self.processed_paths.append(original_filename) + + consts = list(co.co_consts) + for i in range(len(consts)): + if isinstance(consts[i], type(co)): + consts[i] = self.replace_paths_in_code(consts[i]) + + return co.replace(co_consts=tuple(consts), co_filename=new_filename) + + +def test(): + # Parse command line + import getopt + try: + opts, args = getopt.getopt(sys.argv[1:], "dmp:qx:") + except getopt.error as msg: + print(msg) + return + + # Process options + debug = 1 + domods = 0 + addpath = [] + exclude = [] + for o, a in opts: + if o == '-d': + debug = debug + 1 + if o == '-m': + domods = 1 + if o == '-p': + addpath = addpath + a.split(os.pathsep) + if o == '-q': + debug = 0 + if o == '-x': + exclude.append(a) + + # Provide default arguments + if not args: + script = "hello.py" + else: + script = args[0] + + # Set the path based on sys.path and the script directory + path = sys.path[:] + path[0] = os.path.dirname(script) + path = addpath + path + if debug > 1: + print("path:") + for item in path: + print(" ", repr(item)) + + # Create the module finder and turn its crank + mf = ModuleFinder(path, debug, exclude) + for arg in args[1:]: + if arg == '-m': + domods = 1 + continue + if domods: + if arg[-2:] == '.*': + mf.import_hook(arg[:-2], None, ["*"]) + else: + mf.import_hook(arg) + else: + mf.load_file(arg) + mf.run_script(script) + mf.report() + return mf # for -i debugging + + +if __name__ == '__main__': + try: + mf = test() + except KeyboardInterrupt: + print("\n[interrupted]") diff --git a/stdlib/pyclbr.py b/stdlib/pyclbr.py new file mode 100644 index 00000000..37f86995 --- /dev/null +++ b/stdlib/pyclbr.py @@ -0,0 +1,314 @@ +"""Parse a Python module and describe its classes and functions. + +Parse enough of a Python file to recognize imports and class and +function definitions, and to find out the superclasses of a class. + +The interface consists of a single function: + readmodule_ex(module, path=None) +where module is the name of a Python module, and path is an optional +list of directories where the module is to be searched. If present, +path is prepended to the system search path sys.path. The return value +is a dictionary. The keys of the dictionary are the names of the +classes and functions defined in the module (including classes that are +defined via the from XXX import YYY construct). The values are +instances of classes Class and Function. One special key/value pair is +present for packages: the key '__path__' has a list as its value which +contains the package search path. + +Classes and Functions have a common superclass: _Object. Every instance +has the following attributes: + module -- name of the module; + name -- name of the object; + file -- file in which the object is defined; + lineno -- line in the file where the object's definition starts; + end_lineno -- line in the file where the object's definition ends; + parent -- parent of this object, if any; + children -- nested objects contained in this object. +The 'children' attribute is a dictionary mapping names to objects. + +Instances of Function describe functions with the attributes from _Object, +plus the following: + is_async -- if a function is defined with an 'async' prefix + +Instances of Class describe classes with the attributes from _Object, +plus the following: + super -- list of super classes (Class instances if possible); + methods -- mapping of method names to beginning line numbers. +If the name of a super class is not recognized, the corresponding +entry in the list of super classes is not a class instance but a +string giving the name of the super class. Since import statements +are recognized and imported modules are scanned as well, this +shouldn't happen often. +""" + +import ast +import sys +import importlib.util + +__all__ = ["readmodule", "readmodule_ex", "Class", "Function"] + +_modules = {} # Initialize cache of modules we've seen. + + +class _Object: + "Information about Python class or function." + def __init__(self, module, name, file, lineno, end_lineno, parent): + self.module = module + self.name = name + self.file = file + self.lineno = lineno + self.end_lineno = end_lineno + self.parent = parent + self.children = {} + if parent is not None: + parent.children[name] = self + + +# Odd Function and Class signatures are for back-compatibility. +class Function(_Object): + "Information about a Python function, including methods." + def __init__(self, module, name, file, lineno, + parent=None, is_async=False, *, end_lineno=None): + super().__init__(module, name, file, lineno, end_lineno, parent) + self.is_async = is_async + if isinstance(parent, Class): + parent.methods[name] = lineno + + +class Class(_Object): + "Information about a Python class." + def __init__(self, module, name, super_, file, lineno, + parent=None, *, end_lineno=None): + super().__init__(module, name, file, lineno, end_lineno, parent) + self.super = super_ or [] + self.methods = {} + + +# These 2 functions are used in these tests +# Lib/test/test_pyclbr, Lib/idlelib/idle_test/test_browser.py +def _nest_function(ob, func_name, lineno, end_lineno, is_async=False): + "Return a Function after nesting within ob." + return Function(ob.module, func_name, ob.file, lineno, + parent=ob, is_async=is_async, end_lineno=end_lineno) + +def _nest_class(ob, class_name, lineno, end_lineno, super=None): + "Return a Class after nesting within ob." + return Class(ob.module, class_name, super, ob.file, lineno, + parent=ob, end_lineno=end_lineno) + + +def readmodule(module, path=None): + """Return Class objects for the top-level classes in module. + + This is the original interface, before Functions were added. + """ + + res = {} + for key, value in _readmodule(module, path or []).items(): + if isinstance(value, Class): + res[key] = value + return res + +def readmodule_ex(module, path=None): + """Return a dictionary with all functions and classes in module. + + Search for module in PATH + sys.path. + If possible, include imported superclasses. + Do this by reading source, without importing (and executing) it. + """ + return _readmodule(module, path or []) + + +def _readmodule(module, path, inpackage=None): + """Do the hard work for readmodule[_ex]. + + If inpackage is given, it must be the dotted name of the package in + which we are searching for a submodule, and then PATH must be the + package search path; otherwise, we are searching for a top-level + module, and path is combined with sys.path. + """ + # Compute the full module name (prepending inpackage if set). + if inpackage is not None: + fullmodule = "%s.%s" % (inpackage, module) + else: + fullmodule = module + + # Check in the cache. + if fullmodule in _modules: + return _modules[fullmodule] + + # Initialize the dict for this module's contents. + tree = {} + + # Check if it is a built-in module; we don't do much for these. + if module in sys.builtin_module_names and inpackage is None: + _modules[module] = tree + return tree + + # Check for a dotted module name. + i = module.rfind('.') + if i >= 0: + package = module[:i] + submodule = module[i+1:] + parent = _readmodule(package, path, inpackage) + if inpackage is not None: + package = "%s.%s" % (inpackage, package) + if not '__path__' in parent: + raise ImportError('No package named {}'.format(package)) + return _readmodule(submodule, parent['__path__'], package) + + # Search the path for the module. + f = None + if inpackage is not None: + search_path = path + else: + search_path = path + sys.path + spec = importlib.util._find_spec_from_path(fullmodule, search_path) + if spec is None: + raise ModuleNotFoundError(f"no module named {fullmodule!r}", name=fullmodule) + _modules[fullmodule] = tree + # Is module a package? + if spec.submodule_search_locations is not None: + tree['__path__'] = spec.submodule_search_locations + try: + source = spec.loader.get_source(fullmodule) + except (AttributeError, ImportError): + # If module is not Python source, we cannot do anything. + return tree + else: + if source is None: + return tree + + fname = spec.loader.get_filename(fullmodule) + return _create_tree(fullmodule, path, fname, source, tree, inpackage) + + +class _ModuleBrowser(ast.NodeVisitor): + def __init__(self, module, path, file, tree, inpackage): + self.path = path + self.tree = tree + self.file = file + self.module = module + self.inpackage = inpackage + self.stack = [] + + def visit_ClassDef(self, node): + bases = [] + for base in node.bases: + name = ast.unparse(base) + if name in self.tree: + # We know this super class. + bases.append(self.tree[name]) + elif len(names := name.split(".")) > 1: + # Super class form is module.class: + # look in module for class. + *_, module, class_ = names + if module in _modules: + bases.append(_modules[module].get(class_, name)) + else: + bases.append(name) + + parent = self.stack[-1] if self.stack else None + class_ = Class(self.module, node.name, bases, self.file, node.lineno, + parent=parent, end_lineno=node.end_lineno) + if parent is None: + self.tree[node.name] = class_ + self.stack.append(class_) + self.generic_visit(node) + self.stack.pop() + + def visit_FunctionDef(self, node, *, is_async=False): + parent = self.stack[-1] if self.stack else None + function = Function(self.module, node.name, self.file, node.lineno, + parent, is_async, end_lineno=node.end_lineno) + if parent is None: + self.tree[node.name] = function + self.stack.append(function) + self.generic_visit(node) + self.stack.pop() + + def visit_AsyncFunctionDef(self, node): + self.visit_FunctionDef(node, is_async=True) + + def visit_Import(self, node): + if node.col_offset != 0: + return + + for module in node.names: + try: + try: + _readmodule(module.name, self.path, self.inpackage) + except ImportError: + _readmodule(module.name, []) + except (ImportError, SyntaxError): + # If we can't find or parse the imported module, + # too bad -- don't die here. + continue + + def visit_ImportFrom(self, node): + if node.col_offset != 0: + return + try: + module = "." * node.level + if node.module: + module += node.module + module = _readmodule(module, self.path, self.inpackage) + except (ImportError, SyntaxError): + return + + for name in node.names: + if name.name in module: + self.tree[name.asname or name.name] = module[name.name] + elif name.name == "*": + for import_name, import_value in module.items(): + if import_name.startswith("_"): + continue + self.tree[import_name] = import_value + + +def _create_tree(fullmodule, path, fname, source, tree, inpackage): + mbrowser = _ModuleBrowser(fullmodule, path, fname, tree, inpackage) + mbrowser.visit(ast.parse(source)) + return mbrowser.tree + + +def _main(): + "Print module output (default this file) for quick visual check." + import os + try: + mod = sys.argv[1] + except: + mod = __file__ + if os.path.exists(mod): + path = [os.path.dirname(mod)] + mod = os.path.basename(mod) + if mod.lower().endswith(".py"): + mod = mod[:-3] + else: + path = [] + tree = readmodule_ex(mod, path) + lineno_key = lambda a: getattr(a, 'lineno', 0) + objs = sorted(tree.values(), key=lineno_key, reverse=True) + indent_level = 2 + while objs: + obj = objs.pop() + if isinstance(obj, list): + # Value is a __path__ key. + continue + if not hasattr(obj, 'indent'): + obj.indent = 0 + + if isinstance(obj, _Object): + new_objs = sorted(obj.children.values(), + key=lineno_key, reverse=True) + for ob in new_objs: + ob.indent = obj.indent + indent_level + objs.extend(new_objs) + if isinstance(obj, Class): + print("{}class {} {} {}" + .format(' ' * obj.indent, obj.name, obj.super, obj.lineno)) + elif isinstance(obj, Function): + print("{}def {} {}".format(' ' * obj.indent, obj.name, obj.lineno)) + +if __name__ == "__main__": + _main() diff --git a/stdlib/zipapp.py b/stdlib/zipapp.py new file mode 100644 index 00000000..7a4ef96e --- /dev/null +++ b/stdlib/zipapp.py @@ -0,0 +1,231 @@ +import contextlib +import os +import pathlib +import shutil +import stat +import sys +import zipfile + +__all__ = ['ZipAppError', 'create_archive', 'get_interpreter'] + + +# The __main__.py used if the users specifies "-m module:fn". +# Note that this will always be written as UTF-8 (module and +# function names can be non-ASCII in Python 3). +# We add a coding cookie even though UTF-8 is the default in Python 3 +# because the resulting archive may be intended to be run under Python 2. +MAIN_TEMPLATE = """\ +# -*- coding: utf-8 -*- +import {module} +{module}.{fn}() +""" + + +# The Windows launcher defaults to UTF-8 when parsing shebang lines if the +# file has no BOM. So use UTF-8 on Windows. +# On Unix, use the filesystem encoding. +if sys.platform.startswith('win'): + shebang_encoding = 'utf-8' +else: + shebang_encoding = sys.getfilesystemencoding() + + +class ZipAppError(ValueError): + pass + + +@contextlib.contextmanager +def _maybe_open(archive, mode): + if isinstance(archive, (str, os.PathLike)): + with open(archive, mode) as f: + yield f + else: + yield archive + + +def _write_file_prefix(f, interpreter): + """Write a shebang line.""" + if interpreter: + shebang = b'#!' + interpreter.encode(shebang_encoding) + b'\n' + f.write(shebang) + + +def _copy_archive(archive, new_archive, interpreter=None): + """Copy an application archive, modifying the shebang line.""" + with _maybe_open(archive, 'rb') as src: + # Skip the shebang line from the source. + # Read 2 bytes of the source and check if they are #!. + first_2 = src.read(2) + if first_2 == b'#!': + # Discard the initial 2 bytes and the rest of the shebang line. + first_2 = b'' + src.readline() + + with _maybe_open(new_archive, 'wb') as dst: + _write_file_prefix(dst, interpreter) + # If there was no shebang, "first_2" contains the first 2 bytes + # of the source file, so write them before copying the rest + # of the file. + dst.write(first_2) + shutil.copyfileobj(src, dst) + + if interpreter and isinstance(new_archive, str): + os.chmod(new_archive, os.stat(new_archive).st_mode | stat.S_IEXEC) + + +def create_archive(source, target=None, interpreter=None, main=None, + filter=None, compressed=False): + """Create an application archive from SOURCE. + + The SOURCE can be the name of a directory, or a filename or a file-like + object referring to an existing archive. + + The content of SOURCE is packed into an application archive in TARGET, + which can be a filename or a file-like object. If SOURCE is a directory, + TARGET can be omitted and will default to the name of SOURCE with .pyz + appended. + + The created application archive will have a shebang line specifying + that it should run with INTERPRETER (there will be no shebang line if + INTERPRETER is None), and a __main__.py which runs MAIN (if MAIN is + not specified, an existing __main__.py will be used). It is an error + to specify MAIN for anything other than a directory source with no + __main__.py, and it is an error to omit MAIN if the directory has no + __main__.py. + """ + # Are we copying an existing archive? + source_is_file = False + if hasattr(source, 'read') and hasattr(source, 'readline'): + source_is_file = True + else: + source = pathlib.Path(source) + if source.is_file(): + source_is_file = True + + if source_is_file: + _copy_archive(source, target, interpreter) + return + + # We are creating a new archive from a directory. + if not source.exists(): + raise ZipAppError("Source does not exist") + has_main = (source / '__main__.py').is_file() + if main and has_main: + raise ZipAppError( + "Cannot specify entry point if the source has __main__.py") + if not (main or has_main): + raise ZipAppError("Archive has no entry point") + + main_py = None + if main: + # Check that main has the right format. + mod, sep, fn = main.partition(':') + mod_ok = all(part.isidentifier() for part in mod.split('.')) + fn_ok = all(part.isidentifier() for part in fn.split('.')) + if not (sep == ':' and mod_ok and fn_ok): + raise ZipAppError("Invalid entry point: " + main) + main_py = MAIN_TEMPLATE.format(module=mod, fn=fn) + + if target is None: + target = source.with_suffix('.pyz') + elif not hasattr(target, 'write'): + target = pathlib.Path(target) + + # Create the list of files to add to the archive now, in case + # the target is being created in the source directory - we + # don't want the target being added to itself + files_to_add = {} + for path in sorted(source.rglob('*')): + relative_path = path.relative_to(source) + if filter is None or filter(relative_path): + files_to_add[path] = relative_path + + # The target cannot be in the list of files to add. If it were, we'd + # end up overwriting the source file and writing the archive into + # itself, which is an error. We therefore check for that case and + # provide a helpful message for the user. + + # Note that we only do a simple path equality check. This won't + # catch every case, but it will catch the common case where the + # source is the CWD and the target is a file in the CWD. More + # thorough checks don't provide enough value to justify the extra + # cost. + + # If target is a file-like object, it will simply fail to compare + # equal to any of the entries in files_to_add, so there's no need + # to add a special check for that. + if target in files_to_add: + raise ZipAppError( + f"The target archive {target} overwrites one of the source files.") + + with _maybe_open(target, 'wb') as fd: + _write_file_prefix(fd, interpreter) + compression = (zipfile.ZIP_DEFLATED if compressed else + zipfile.ZIP_STORED) + with zipfile.ZipFile(fd, 'w', compression=compression) as z: + for path, relative_path in files_to_add.items(): + z.write(path, relative_path.as_posix()) + if main_py: + z.writestr('__main__.py', main_py.encode('utf-8')) + + if interpreter and not hasattr(target, 'write'): + target.chmod(target.stat().st_mode | stat.S_IEXEC) + + +def get_interpreter(archive): + with _maybe_open(archive, 'rb') as f: + if f.read(2) == b'#!': + return f.readline().strip().decode(shebang_encoding) + + +def main(args=None): + """Run the zipapp command line interface. + + The ARGS parameter lets you specify the argument list directly. + Omitting ARGS (or setting it to None) works as for argparse, using + sys.argv[1:] as the argument list. + """ + import argparse + + parser = argparse.ArgumentParser(color=True) + parser.add_argument('--output', '-o', default=None, + help="The name of the output archive. " + "Required if SOURCE is an archive.") + parser.add_argument('--python', '-p', default=None, + help="The name of the Python interpreter to use " + "(default: no shebang line).") + parser.add_argument('--main', '-m', default=None, + help="The main function of the application " + "(default: use an existing __main__.py).") + parser.add_argument('--compress', '-c', action='store_true', + help="Compress files with the deflate method. " + "Files are stored uncompressed by default.") + parser.add_argument('--info', default=False, action='store_true', + help="Display the interpreter from the archive.") + parser.add_argument('source', + help="Source directory (or existing archive).") + + args = parser.parse_args(args) + + # Handle `python -m zipapp archive.pyz --info`. + if args.info: + if not os.path.isfile(args.source): + raise SystemExit("Can only get info for an archive file") + interpreter = get_interpreter(args.source) + print("Interpreter: {}".format(interpreter or "")) + sys.exit(0) + + if os.path.isfile(args.source): + if args.output is None or (os.path.exists(args.output) and + os.path.samefile(args.source, args.output)): + raise SystemExit("In-place editing of archives is not supported") + if args.main: + raise SystemExit("Cannot change the main function when copying") + + create_archive(args.source, args.output, + interpreter=args.python, main=args.main, + compressed=args.compress) + + +if __name__ == '__main__': + main() From 45fbf4d4b9ee10a01427d9e218a9cb799f287a26 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 22:31:44 +0700 Subject: [PATCH 04/84] io subclasses, SystemExit.code, chmod path-like A few gaps that surfaced once test_zipapp could import: - Python subclasses of the io base types are *Instance objects, so their own methods and instance dict have to win over the synthesized native methods. The custom getattr/setattr now route those instances through the generic path, matching PyObject_GenericGetAttr's MRO walk. This is what let _ZipWriteFile override close() and carry _zinfo. - BytesIO and StringIO keep object's identity hash (they define no __eq__), so they're hashable again. - SystemExit grows its code member, derived from the constructor args like SystemExit_init and overridable by assignment. - os.chmod accepts str, bytes, or any os.PathLike via __fspath__. test_zipapp now matches CPython 3.14 (35 passing). --- errors/builtins.go | 49 ++++++++++++++++++++++++++++++++++++++ errors/exception.go | 10 ++++++++ module/io/bufferedio.go | 12 +++++++--- module/io/bytesio.go | 9 ++++++- module/io/fileio.go | 3 ++- module/io/iobase.go | 39 ++++++++++++++++++++++++++++-- module/io/stringio.go | 4 ++++ module/io/textiowrapper.go | 14 +++++++---- module/os/posix_extra.go | 38 +++++++++++++++++++++++++---- 9 files changed, 163 insertions(+), 15 deletions(-) diff --git a/errors/builtins.go b/errors/builtins.go index 7332c428..09420344 100644 --- a/errors/builtins.go +++ b/errors/builtins.go @@ -117,6 +117,11 @@ func init() { // CPython: Objects/exceptions.c:684 StopIteration_init objects.SetTypeDescr(PyExc_StopIteration, "value", objects.NewGetSetDescr("value", stopIterValueGet, stopIterValueSet)) + // SystemExit exposes a dedicated `code` member seeded by SystemExit_init. + // + // CPython: Objects/exceptions.c:880 SystemExit_members + objects.SetTypeDescr(PyExc_SystemExit, "code", + objects.NewGetSetDescr("code", sysExitCodeGet, sysExitCodeSet)) // AsyncGenStopIterationHook lets objects/async_gen.go raise a typed // StopIteration(value) without importing this package. Mirrors // _PyGen_SetStopIterationValue in the async_gen_unwrap_value path. @@ -280,6 +285,50 @@ func excTpNew(cls *objects.Type, args []objects.Object, kwargs map[string]object return exc, nil } +// sysExitCodeGet returns SystemExit's `code`. An explicit assignment is +// preserved in the dedicated slot; otherwise the value is derived from the +// constructor args exactly as SystemExit_init seeds it (args[0] for one +// arg, the args tuple for several, None for none). +// +// CPython: Objects/exceptions.c:866 SystemExit_init +// CPython: Objects/exceptions.c:880 SystemExit_members (code) +func sysExitCodeGet(owner objects.Object) (objects.Object, error) { + e, ok := owner.(*Exception) + if !ok { + return objects.None(), nil + } + if e.SysExitCode != nil { + return e.SysExitCode, nil + } + if e.Args == nil { + return objects.None(), nil + } + switch e.Args.Len() { + case 0: + return objects.None(), nil + case 1: + return e.Args.Item(0), nil + default: + return e.Args, nil + } +} + +// sysExitCodeSet writes only the dedicated SysExitCode slot, leaving +// args untouched. Mirrors the _Py_T_OBJECT member on PySystemExitObject. +// +// CPython: Objects/exceptions.c:880 SystemExit_members (code) +func sysExitCodeSet(owner objects.Object, value objects.Object) error { + e, ok := owner.(*Exception) + if !ok { + return stderrors.New("TypeError: descriptor 'code' requires SystemExit") + } + if value == nil { + value = objects.None() + } + e.SysExitCode = value + return nil +} + // excStr ports BaseException_str: empty for no args, str(args[0]) for // a single arg, repr(args) otherwise. // diff --git a/errors/exception.go b/errors/exception.go index 32d58b11..21ec989f 100644 --- a/errors/exception.go +++ b/errors/exception.go @@ -62,6 +62,16 @@ type Exception struct { // CPython: Objects/exceptions.c:867 PyBaseExceptionGroupObject EG *ExceptionGroupState + // SysExitCode stores SystemExit's separate `code` member per + // PySystemExitObject. SystemExit_init seeds it from the positional + // args (args[0] for one arg, the args tuple for several, None for + // none); assigning exc.code rewrites only this slot, leaving args + // untouched. Meaningful only when ExcType is SystemExit or a subclass. + // + // CPython: Objects/exceptions.c:854 PySystemExitObject + // CPython: Objects/exceptions.c:866 SystemExit_init + SysExitCode objects.Object + // NotesObj holds a __notes__ value that is not a plain list. CPython // stores __notes__ as an ordinary instance attribute that may hold any // object; add_note only requires a list when it appends. The common diff --git a/module/io/bufferedio.go b/module/io/bufferedio.go index 3f181789..31f392cb 100644 --- a/module/io/bufferedio.go +++ b/module/io/bufferedio.go @@ -346,6 +346,9 @@ func bufferedIOBaseGetattr(self objects.Object, nameObj objects.Object) (objects if !ok { return nil, fmt.Errorf("TypeError: attribute name must be string") } + if v, ok, err := ioUserInstanceAttr(self, nameObj); ok || err != nil { + return v, err + } switch name.Value() { case "detach": return objects.NewBuiltinFunction("detach", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { @@ -372,7 +375,8 @@ func bufferedIOBaseGetattr(self objects.Object, nameObj objects.Object) (objects return nil, fmt.Errorf("UnsupportedOperation: write") }), nil } - return nil, fmt.Errorf("AttributeError: '_io._BufferedIOBase' object has no attribute '%s'", name.Value()) + // Dunders such as __class__/__dict__ resolve through the MRO walk. + return objects.GenericGetAttr(self, nameObj) } // bufferedIOBaseReadintoGeneric implements the shared concrete fallback for @@ -1446,7 +1450,8 @@ func bufferedGetattr(self objects.Object, nameObj objects.Object) (objects.Objec return objects.NewStr(s), nil }), nil } - return nil, fmt.Errorf("AttributeError: '%s' object has no attribute '%s'", typeName, name.Value()) + // Dunders such as __class__/__dict__ resolve through the MRO walk. + return objects.GenericGetAttr(self, nameObj) } // --- constructors ------------------------------------------------------------ @@ -1775,7 +1780,8 @@ func rwPairGetattr(self objects.Object, nameObj objects.Object) (objects.Object, // CPython: Modules/_io/bufferedio.c:2441 bufferedrwpair_closed_get return objects.NewBool(p.writer.closed), nil } - return nil, fmt.Errorf("AttributeError: '_io.BufferedRWPair' object has no attribute '%s'", name.Value()) + // Dunders such as __class__/__dict__ resolve through the MRO walk. + return objects.GenericGetAttr(self, nameObj) } func init() { diff --git a/module/io/bytesio.go b/module/io/bytesio.go index c3e82911..e495803c 100644 --- a/module/io/bytesio.go +++ b/module/io/bytesio.go @@ -45,6 +45,10 @@ func init() { BytesIOType.Iter = bytesIOIter BytesIOType.IterNext = bytesIOIterNext BytesIOType.Getattro = bytesIOGetattr + // BytesIO defines no __eq__, so it keeps object's identity-based hash. + // + // CPython: Modules/_io/bytesio.c:1062 PyBytesIO_Type (tp_hash inherited) + BytesIOType.Hash = objects.IdentityHash // LOAD_SPECIAL walks the type MRO for __enter__ / __exit__. // // CPython: Modules/_io/iobase.c:391 iobase_enter / :409 iobase_exit @@ -446,7 +450,10 @@ func bytesIOGetattr(o objects.Object, name objects.Object) (objects.Object, erro if fn := bytesIOMethod(b, n.Value()); fn != nil { return fn, nil } - return nil, fmt.Errorf("AttributeError: '_io.BytesIO' object has no attribute '%s'", n.Value()) + // Anything the custom dispatch above does not serve (dunders such as + // __class__, __dict__, __reduce_ex__) resolves through the normal MRO + // walk against BytesIOType's bases (object), matching stringIOGetattr. + return objects.GenericGetAttr(o, name) } // bytesIOMethod maps method names to BuiltinFunctions. diff --git a/module/io/fileio.go b/module/io/fileio.go index ca9f5101..d9f2bcb0 100644 --- a/module/io/fileio.go +++ b/module/io/fileio.go @@ -759,7 +759,8 @@ func fileIOGetattr(o objects.Object, name objects.Object) (objects.Object, error if fn := fileIOMethod(fi, n.Value()); fn != nil { return fn, nil } - return nil, fmt.Errorf("AttributeError: '_io.FileIO' object has no attribute '%s'", n.Value()) + // Dunders such as __class__/__dict__ resolve through the MRO walk. + return objects.GenericGetAttr(o, name) } // fileIOSetattr handles attribute assignment on FileIO. Only .name is diff --git a/module/io/iobase.go b/module/io/iobase.go index 4d823dc0..1c55e2e1 100644 --- a/module/io/iobase.go +++ b/module/io/iobase.go @@ -325,6 +325,29 @@ func IOBaseCannotPickle(self objects.Object) (objects.Object, error) { return nil, fmt.Errorf("TypeError: cannot pickle '%s' instances", name) } +// ioUserInstanceAttr resolves attribute lookups for Python subclasses of the +// io base types. Those instances are *Instance objects, so a method the +// subclass (or a mix-in) defines must win over the synthesized native method, +// exactly as PyObject_GenericGetAttr walks the MRO. It returns (value, true, +// nil) when the generic path resolves the name, (nil, false, nil) when the +// caller should fall back to the native method synthesis, and an error to +// propagate verbatim. +// +// CPython: Objects/object.c:1389 _PyObject_GenericGetAttrWithDict +func ioUserInstanceAttr(o objects.Object, name objects.Object) (objects.Object, bool, error) { + if _, ok := o.(*objects.Instance); !ok { + return nil, false, nil + } + v, err := objects.GenericGetAttr(o, name) + if err == nil { + return v, true, nil + } + if objects.IsAttributeError(err) { + return nil, false, nil + } + return nil, false, err +} + // iobaseGetattro dispatches attribute lookup for _IOBase objects. // // CPython: Modules/_io/iobase.c:860 iobase_getset + iobase_methods @@ -333,6 +356,9 @@ func iobaseGetattro(o objects.Object, name objects.Object) (objects.Object, erro if !ok { return nil, fmt.Errorf("TypeError: attribute name must be string") } + if v, ok, err := ioUserInstanceAttr(o, name); ok || err != nil { + return v, err + } return iobaseAttr(o, n.Value()) } @@ -341,6 +367,9 @@ func rawiobaseGetattro(o objects.Object, name objects.Object) (objects.Object, e if !ok { return nil, fmt.Errorf("TypeError: attribute name must be string") } + if v, ok, err := ioUserInstanceAttr(o, name); ok || err != nil { + return v, err + } // Instance dict shadows the type methods so subclasses (and tests) can // override read / readall / readinto / write via setattr, mirroring // CPython's PyObject_GenericGetAttr where the instance __dict__ wins @@ -372,7 +401,10 @@ func iobaseAttr(o objects.Object, name string) (objects.Object, error) { if fn := iobaseMethod(o, name); fn != nil { return fn, nil } - return nil, fmt.Errorf("AttributeError: '_io._IOBase' object has no attribute %q", name) + // User subclasses (*Instance) keep their attributes in a managed dict and + // resolve dunders (__class__, __dict__) through the MRO; defer to the + // generic path rather than raising the bare _IOBase message. + return objects.GenericGetAttr(o, objects.NewStr(name)) } // iobaseSetattro stores an attribute into the instance dict. @@ -383,7 +415,10 @@ func iobaseSetattro(o objects.Object, name objects.Object, value objects.Object) } d := iobaseGetDict(o) if d == nil { - return fmt.Errorf("AttributeError: cannot set attribute on _IOBase without dict") + // User subclasses of the io base types are *Instance objects carrying + // their own managed dict; route their attribute stores through the + // normal generic path instead of the native _IOBase dict. + return objects.GenericSetAttr(o, name, value) } if value == nil { return d.DelItem(objects.NewStr(n.Value())) diff --git a/module/io/stringio.go b/module/io/stringio.go index a5db7218..fca896e9 100644 --- a/module/io/stringio.go +++ b/module/io/stringio.go @@ -59,6 +59,10 @@ func init() { StringIOType.Iter = stringIOIter StringIOType.IterNext = stringIOIterNext StringIOType.Getattro = stringIOGetattr + // StringIO defines no __eq__, so it keeps object's identity-based hash. + // + // CPython: Modules/_io/stringio.c:1056 PyStringIO_Type (tp_hash inherited) + StringIOType.Hash = objects.IdentityHash registerStringIODescrs() objects.AddIterSlotWrappers(StringIOType) } diff --git a/module/io/textiowrapper.go b/module/io/textiowrapper.go index b6da128f..a8715bc8 100644 --- a/module/io/textiowrapper.go +++ b/module/io/textiowrapper.go @@ -969,7 +969,8 @@ func textIOWrapperGetattr(o objects.Object, name objects.Object) (objects.Object return v, nil } } - return nil, fmt.Errorf("AttributeError: '_io.TextIOWrapper' object has no attribute '%s'", n.Value()) + // Dunders such as __class__/__reduce_ex__ resolve through the MRO walk. + return objects.GenericGetAttr(o, name) } // textIOWrapperReadonlyAttrs are the C-level data descriptors that block @@ -1435,7 +1436,8 @@ func incrementalNLDecoderGetattr(o objects.Object, name objects.Object) (objects return objects.None(), nil }), nil } - return nil, fmt.Errorf("AttributeError: '_io.IncrementalNewlineDecoder' object has no attribute '%s'", n.Value()) + // Dunders such as __class__/__dict__ resolve through the MRO walk. + return objects.GenericGetAttr(o, name) } // translateNewlines applies universal newline tracking and (optionally) @@ -1538,11 +1540,14 @@ var TextIOBaseType = objects.NewType("_io._TextIOBase", []*objects.Type{IOBaseTy // textIOBaseGetattr dispatches attribute lookups on _TextIOBase instances. // // CPython: Modules/_io/textio.c:187 textiobase_methods + textiobase_getset -func textIOBaseGetattr(_ objects.Object, nameObj objects.Object) (objects.Object, error) { +func textIOBaseGetattr(self objects.Object, nameObj objects.Object) (objects.Object, error) { name, ok := nameObj.(*objects.Unicode) if !ok { return nil, fmt.Errorf("TypeError: attribute name must be string") } + if v, ok, err := ioUserInstanceAttr(self, nameObj); ok || err != nil { + return v, err + } switch name.Value() { case "detach": // CPython: Modules/_io/textio.c:66 _io__TextIOBase_detach_impl @@ -1574,7 +1579,8 @@ func textIOBaseGetattr(_ objects.Object, nameObj objects.Object) (objects.Object // CPython: Modules/_io/textio.c:180 _io__TextIOBase_errors_get_impl return objects.None(), nil } - return nil, fmt.Errorf("AttributeError: '_io._TextIOBase' object has no attribute '%s'", name.Value()) + // Dunders such as __class__/__dict__ resolve through the MRO walk. + return objects.GenericGetAttr(self, nameObj) } func init() { diff --git a/module/os/posix_extra.go b/module/os/posix_extra.go index aa313c1c..0f0d03e5 100644 --- a/module/os/posix_extra.go +++ b/module/os/posix_extra.go @@ -25,21 +25,51 @@ func osChmod(args []objects.Object, _ map[string]objects.Object) (objects.Object if len(args) < 2 { return nil, fmt.Errorf("TypeError: chmod() missing required arguments") } - path, ok := args[0].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: chmod() path must be str") + p, err := pathStringArg(args[0], "chmod") + if err != nil { + return nil, err } mode, ok := args[1].(*objects.Int) if !ok { return nil, fmt.Errorf("TypeError: chmod() mode must be int") } m, _ := mode.Int64() - if err := goos.Chmod(path.Value(), goos.FileMode(m)); err != nil { + if err := goos.Chmod(p, goos.FileMode(m)); err != nil { return nil, fmt.Errorf("OSError: %w", err) } return objects.None(), nil } +// pathStringArg coerces a path argument the way CPython's path_converter +// does: a str is taken verbatim, bytes are decoded, and any other object is +// run through os.fspath (__fspath__) so pathlib.Path and other PathLike +// objects are accepted. +// +// CPython: Modules/posixmodule.c:1093 path_converter +func pathStringArg(o objects.Object, fname string) (string, error) { + switch v := o.(type) { + case *objects.Unicode: + return v.Value(), nil + case *objects.Bytes: + return string(v.Bytes()), nil + } + m, err := objects.GetAttr(o, objects.NewStr("__fspath__")) + if err != nil { + return "", fmt.Errorf("TypeError: %s: path should be string, bytes or os.PathLike, not %s", fname, o.Type().Name) + } + r, err := objects.Call(m, objects.NewTuple(nil), nil) + if err != nil { + return "", err + } + switch v := r.(type) { + case *objects.Unicode: + return v.Value(), nil + case *objects.Bytes: + return string(v.Bytes()), nil + } + return "", fmt.Errorf("TypeError: expected __fspath__ to return str or bytes, not %s", r.Type().Name) +} + // osSymlink creates a symbolic link at link_name pointing at src. // // CPython: Modules/posixmodule.c os_symlink_impl From 845fda8ca0ca3c00c74447b906fbd8f88211d324 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 22:42:02 +0700 Subject: [PATCH 05/84] imports: port _testmultiphase main module and vendor test_importlib test.test_importlib.util guards itself with import_module("_testmultiphase") at import time, so every test that pulls in that helper (test_pkgutil, test_pyclbr, the test_importlib extension suites) was raising SkipTest under gopy where CPython runs them. Reproduce the PEP 489 extension's main module Go-side: foo, call_state_registration_func, the Example/error/Str types, and the int_const/str_const constants the C execfunc installs. Vendor test_importlib into stdlib/test so test.test_importlib.util resolves as a support module, and re-export importlib.__import__ to match CPython's public surface (util.py reaches for source_importlib.__import__). test_pkgutil and test_pyclbr now run their suites instead of skipping; the remaining failures need the importlib PathFinder/importer surface, which is the next batch. --- module/_testmultiphase/module.go | 245 +++++ stdlib/importlib/__init__.py | 6 + stdlib/test/test_importlib/__init__.py | 5 + stdlib/test/test_importlib/__main__.py | 4 + stdlib/test/test_importlib/abc.py | 93 ++ .../test/test_importlib/builtin/__init__.py | 5 + .../test/test_importlib/builtin/__main__.py | 4 + .../test_importlib/builtin/test_finder.py | 46 + .../test_importlib/builtin/test_loader.py | 110 ++ .../test/test_importlib/extension/__init__.py | 5 + .../test/test_importlib/extension/__main__.py | 4 + .../extension/_test_nonmodule_cases.py | 44 + .../extension/test_case_sensitivity.py | 48 + .../test_importlib/extension/test_finder.py | 69 ++ .../test_importlib/extension/test_loader.py | 392 ++++++++ .../extension/test_path_hook.py | 33 + stdlib/test/test_importlib/frozen/__init__.py | 5 + stdlib/test/test_importlib/frozen/__main__.py | 4 + .../test/test_importlib/frozen/test_finder.py | 183 ++++ .../test/test_importlib/frozen/test_loader.py | 172 ++++ .../test/test_importlib/import_/__init__.py | 5 + .../test/test_importlib/import_/__main__.py | 4 + .../test_importlib/import_/test___loader__.py | 34 + .../import_/test___package__.py | 152 +++ .../test/test_importlib/import_/test_api.py | 145 +++ .../test_importlib/import_/test_caching.py | 97 ++ .../test_importlib/import_/test_fromlist.py | 175 ++++ .../test_importlib/import_/test_helpers.py | 184 ++++ .../test_importlib/import_/test_meta_path.py | 127 +++ .../test_importlib/import_/test_packages.py | 110 ++ .../test/test_importlib/import_/test_path.py | 269 +++++ .../import_/test_relative_imports.py | 248 +++++ .../test/test_importlib/metadata/__init__.py | 0 .../test/test_importlib/metadata/_context.py | 13 + stdlib/test/test_importlib/metadata/_path.py | 115 +++ .../test_importlib/metadata/data/__init__.py | 0 .../data/example-21.12-py3-none-any.whl | Bin 0 -> 1455 bytes .../metadata/data/example-21.12-py3.6.egg | Bin 0 -> 1497 bytes .../data/example2-1.0.0-py3-none-any.whl | Bin 0 -> 1167 bytes .../data/sources/example/example/__init__.py | 2 + .../metadata/data/sources/example/setup.py | 11 + .../sources/example2/example2/__init__.py | 2 + .../data/sources/example2/pyproject.toml | 10 + .../test/test_importlib/metadata/fixtures.py | 395 ++++++++ stdlib/test/test_importlib/metadata/stubs.py | 10 + .../test/test_importlib/metadata/test_api.py | 323 ++++++ .../test/test_importlib/metadata/test_main.py | 468 +++++++++ .../test/test_importlib/metadata/test_zip.py | 62 ++ .../namespace_pkgs/both_portions/foo/one.py | 1 + .../namespace_pkgs/both_portions/foo/two.py | 1 + .../namespace_pkgs/missing_directory.zip | Bin 0 -> 515 bytes .../module_and_namespace_package/a_test.py | 1 + .../module_and_namespace_package/a_test/empty | 0 .../namespace_pkgs/nested_portion1.zip | Bin 0 -> 556 bytes .../not_a_namespace_pkg/foo/__init__.py | 0 .../not_a_namespace_pkg/foo/one.py | 1 + .../namespace_pkgs/portion1/foo/one.py | 1 + .../namespace_pkgs/portion2/foo/two.py | 1 + .../project1/parent/child/one.py | 1 + .../project2/parent/child/two.py | 1 + .../project3/parent/child/three.py | 1 + .../namespace_pkgs/top_level_portion1.zip | Bin 0 -> 332 bytes .../test/test_importlib/partial/cfimport.py | 38 + .../test_importlib/partial/pool_in_threads.py | 27 + .../test/test_importlib/resources/__init__.py | 0 stdlib/test/test_importlib/resources/_path.py | 94 ++ .../resources/test_compatibilty_files.py | 104 ++ .../test_importlib/resources/test_contents.py | 38 + .../test_importlib/resources/test_custom.py | 48 + .../test_importlib/resources/test_files.py | 191 ++++ .../resources/test_functional.py | 249 +++++ .../test_importlib/resources/test_open.py | 84 ++ .../test_importlib/resources/test_path.py | 60 ++ .../test_importlib/resources/test_read.py | 93 ++ .../test_importlib/resources/test_reader.py | 137 +++ .../test_importlib/resources/test_resource.py | 236 +++++ stdlib/test/test_importlib/resources/util.py | 206 ++++ stdlib/test/test_importlib/resources/zip.py | 24 + stdlib/test/test_importlib/source/__init__.py | 5 + stdlib/test/test_importlib/source/__main__.py | 4 + .../source/test_case_sensitivity.py | 78 ++ .../test_importlib/source/test_file_loader.py | 795 +++++++++++++++ .../test/test_importlib/source/test_finder.py | 212 ++++ .../test_importlib/source/test_path_hook.py | 32 + .../source/test_source_encoding.py | 175 ++++ stdlib/test/test_importlib/test_abc.py | 943 ++++++++++++++++++ stdlib/test/test_importlib/test_api.py | 508 ++++++++++ stdlib/test/test_importlib/test_lazy.py | 229 +++++ stdlib/test/test_importlib/test_locks.py | 161 +++ .../test_importlib/test_namespace_pkgs.py | 379 +++++++ stdlib/test/test_importlib/test_pkg_import.py | 80 ++ stdlib/test/test_importlib/test_spec.py | 698 +++++++++++++ .../test_importlib/test_threaded_import.py | 340 +++++++ stdlib/test/test_importlib/test_util.py | 861 ++++++++++++++++ stdlib/test/test_importlib/test_windows.py | 210 ++++ .../test_importlib/threaded_import_hangers.py | 45 + stdlib/test/test_importlib/util.py | 402 ++++++++ stdlibinit/registry.go | 7 + 98 files changed, 12240 insertions(+) create mode 100644 module/_testmultiphase/module.go create mode 100644 stdlib/test/test_importlib/__init__.py create mode 100644 stdlib/test/test_importlib/__main__.py create mode 100644 stdlib/test/test_importlib/abc.py create mode 100644 stdlib/test/test_importlib/builtin/__init__.py create mode 100644 stdlib/test/test_importlib/builtin/__main__.py create mode 100644 stdlib/test/test_importlib/builtin/test_finder.py create mode 100644 stdlib/test/test_importlib/builtin/test_loader.py create mode 100644 stdlib/test/test_importlib/extension/__init__.py create mode 100644 stdlib/test/test_importlib/extension/__main__.py create mode 100644 stdlib/test/test_importlib/extension/_test_nonmodule_cases.py create mode 100644 stdlib/test/test_importlib/extension/test_case_sensitivity.py create mode 100644 stdlib/test/test_importlib/extension/test_finder.py create mode 100644 stdlib/test/test_importlib/extension/test_loader.py create mode 100644 stdlib/test/test_importlib/extension/test_path_hook.py create mode 100644 stdlib/test/test_importlib/frozen/__init__.py create mode 100644 stdlib/test/test_importlib/frozen/__main__.py create mode 100644 stdlib/test/test_importlib/frozen/test_finder.py create mode 100644 stdlib/test/test_importlib/frozen/test_loader.py create mode 100644 stdlib/test/test_importlib/import_/__init__.py create mode 100644 stdlib/test/test_importlib/import_/__main__.py create mode 100644 stdlib/test/test_importlib/import_/test___loader__.py create mode 100644 stdlib/test/test_importlib/import_/test___package__.py create mode 100644 stdlib/test/test_importlib/import_/test_api.py create mode 100644 stdlib/test/test_importlib/import_/test_caching.py create mode 100644 stdlib/test/test_importlib/import_/test_fromlist.py create mode 100644 stdlib/test/test_importlib/import_/test_helpers.py create mode 100644 stdlib/test/test_importlib/import_/test_meta_path.py create mode 100644 stdlib/test/test_importlib/import_/test_packages.py create mode 100644 stdlib/test/test_importlib/import_/test_path.py create mode 100644 stdlib/test/test_importlib/import_/test_relative_imports.py create mode 100644 stdlib/test/test_importlib/metadata/__init__.py create mode 100644 stdlib/test/test_importlib/metadata/_context.py create mode 100644 stdlib/test/test_importlib/metadata/_path.py create mode 100644 stdlib/test/test_importlib/metadata/data/__init__.py create mode 100644 stdlib/test/test_importlib/metadata/data/example-21.12-py3-none-any.whl create mode 100644 stdlib/test/test_importlib/metadata/data/example-21.12-py3.6.egg create mode 100644 stdlib/test/test_importlib/metadata/data/example2-1.0.0-py3-none-any.whl create mode 100644 stdlib/test/test_importlib/metadata/data/sources/example/example/__init__.py create mode 100644 stdlib/test/test_importlib/metadata/data/sources/example/setup.py create mode 100644 stdlib/test/test_importlib/metadata/data/sources/example2/example2/__init__.py create mode 100644 stdlib/test/test_importlib/metadata/data/sources/example2/pyproject.toml create mode 100644 stdlib/test/test_importlib/metadata/fixtures.py create mode 100644 stdlib/test/test_importlib/metadata/stubs.py create mode 100644 stdlib/test/test_importlib/metadata/test_api.py create mode 100644 stdlib/test/test_importlib/metadata/test_main.py create mode 100644 stdlib/test/test_importlib/metadata/test_zip.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/one.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/two.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/missing_directory.zip create mode 100644 stdlib/test/test_importlib/namespace_pkgs/module_and_namespace_package/a_test.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/module_and_namespace_package/a_test/empty create mode 100644 stdlib/test/test_importlib/namespace_pkgs/nested_portion1.zip create mode 100644 stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/__init__.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/one.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/portion1/foo/one.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/portion2/foo/two.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/project1/parent/child/one.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/project2/parent/child/two.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/project3/parent/child/three.py create mode 100644 stdlib/test/test_importlib/namespace_pkgs/top_level_portion1.zip create mode 100644 stdlib/test/test_importlib/partial/cfimport.py create mode 100644 stdlib/test/test_importlib/partial/pool_in_threads.py create mode 100644 stdlib/test/test_importlib/resources/__init__.py create mode 100644 stdlib/test/test_importlib/resources/_path.py create mode 100644 stdlib/test/test_importlib/resources/test_compatibilty_files.py create mode 100644 stdlib/test/test_importlib/resources/test_contents.py create mode 100644 stdlib/test/test_importlib/resources/test_custom.py create mode 100644 stdlib/test/test_importlib/resources/test_files.py create mode 100644 stdlib/test/test_importlib/resources/test_functional.py create mode 100644 stdlib/test/test_importlib/resources/test_open.py create mode 100644 stdlib/test/test_importlib/resources/test_path.py create mode 100644 stdlib/test/test_importlib/resources/test_read.py create mode 100644 stdlib/test/test_importlib/resources/test_reader.py create mode 100644 stdlib/test/test_importlib/resources/test_resource.py create mode 100644 stdlib/test/test_importlib/resources/util.py create mode 100755 stdlib/test/test_importlib/resources/zip.py create mode 100644 stdlib/test/test_importlib/source/__init__.py create mode 100644 stdlib/test/test_importlib/source/__main__.py create mode 100644 stdlib/test/test_importlib/source/test_case_sensitivity.py create mode 100644 stdlib/test/test_importlib/source/test_file_loader.py create mode 100644 stdlib/test/test_importlib/source/test_finder.py create mode 100644 stdlib/test/test_importlib/source/test_path_hook.py create mode 100644 stdlib/test/test_importlib/source/test_source_encoding.py create mode 100644 stdlib/test/test_importlib/test_abc.py create mode 100644 stdlib/test/test_importlib/test_api.py create mode 100644 stdlib/test/test_importlib/test_lazy.py create mode 100644 stdlib/test/test_importlib/test_locks.py create mode 100644 stdlib/test/test_importlib/test_namespace_pkgs.py create mode 100644 stdlib/test/test_importlib/test_pkg_import.py create mode 100644 stdlib/test/test_importlib/test_spec.py create mode 100644 stdlib/test/test_importlib/test_threaded_import.py create mode 100644 stdlib/test/test_importlib/test_util.py create mode 100644 stdlib/test/test_importlib/test_windows.py create mode 100644 stdlib/test/test_importlib/threaded_import_hangers.py create mode 100644 stdlib/test/test_importlib/util.py diff --git a/module/_testmultiphase/module.go b/module/_testmultiphase/module.go new file mode 100644 index 00000000..d3fe8043 --- /dev/null +++ b/module/_testmultiphase/module.go @@ -0,0 +1,245 @@ +// Package testmultiphase is the gopy port of CPython's +// Modules/_testmultiphase.c, the C extension that exercises multi-phase +// initialization of extension modules (PEP 489). The standard-library +// test suite reaches for it indirectly: test.test_importlib.util runs +// import_helper.import_module("_testmultiphase") at import time, so any +// test that pulls in that helper (test_pkgutil, test_pyclbr, the +// test_importlib extension suites) raises SkipTest when the module is +// absent. +// +// gopy cannot dlopen the compiled extension, so the main module is +// reproduced as a Go-native inittab entry: the same name, methods, types +// and constants the C execfunc installs. The many PyInit__testmultiphase_* +// variants (nonmodule, bad_slot_*, negative_size, ...) drive the +// extension-loader edge cases in test_importlib and are added when those +// suites need them. +// +// CPython: Modules/_testmultiphase.c:447 PyInit__testmultiphase +// CPython: Modules/_testmultiphase.c:392 execfunc +package testmultiphase + +import ( + "fmt" + + pyerrors "github.com/tamnd/gopy/errors" + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/objects" +) + +func init() { + _ = imp.AppendInittab("_testmultiphase", buildModule) +} + +// exampleObject backs _testimportexec.Example: a GC type whose attribute +// store is an explicit x_attr dict consulted ahead of the generic +// attribute machinery. +// +// CPython: Modules/_testmultiphase.c:25 ExampleObject +type exampleObject struct { + objects.Header + xAttr *objects.Dict +} + +// exampleType / strType / errorType are the singletons installed by +// execfunc. +// +// CPython: Modules/_testmultiphase.c:124 Example_Type_spec +// CPython: Modules/_testmultiphase.c:366 Str_Type_spec +// CPython: Modules/_testmultiphase.c:399 PyErr_NewException("_testimportexec.error") +var ( + exampleType *objects.Type + strType *objects.Type + errorType *objects.Type +) + +// exampleDemo ports Example_demo: demo(o=None) returns o when it is a +// str, otherwise None. +// +// CPython: Modules/_testmultiphase.c:57 Example_demo +func exampleDemo(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 1 { + return nil, fmt.Errorf("TypeError: demo() missing self argument") + } + rest := args[1:] + if len(rest) > 1 { + return nil, fmt.Errorf("TypeError: demo() takes at most 1 argument (%d given)", len(rest)) + } + if len(rest) == 1 { + if _, ok := rest[0].(*objects.Unicode); ok { + return rest[0], nil + } + } + return objects.None(), nil +} + +// exampleGetattro ports Example_getattro: consult x_attr first, then fall +// back to PyObject_GenericGetAttr. +// +// CPython: Modules/_testmultiphase.c:77 Example_getattro +func exampleGetattro(o objects.Object, name objects.Object) (objects.Object, error) { + self, ok := o.(*exampleObject) + if ok && self.xAttr != nil { + found, err := self.xAttr.Contains(name) + if err != nil { + return nil, err + } + if found { + v, err := self.xAttr.GetItem(name) + if err != nil { + return nil, err + } + objects.Incref(v) + return v, nil + } + } + return objects.GenericGetAttr(o, name) +} + +// exampleSetattro ports Example_setattr: store into the lazily created +// x_attr dict; a delete of a missing key raises AttributeError. +// +// CPython: Modules/_testmultiphase.c:93 Example_setattr +func exampleSetattro(o objects.Object, name objects.Object, value objects.Object) error { + self, ok := o.(*exampleObject) + if !ok { + return fmt.Errorf("TypeError: not an Example") + } + if self.xAttr == nil { + self.xAttr = objects.NewDict() + } + if value == nil { + found, err := self.xAttr.Contains(name) + if err != nil { + return err + } + if !found { + return fmt.Errorf("AttributeError: delete non-existing Example attribute") + } + return self.xAttr.DelItem(name) + } + return self.xAttr.SetItem(name, value) +} + +// exampleTraverse keeps x_attr reachable for the collector. +// +// CPython: Modules/_testmultiphase.c:42 Example_traverse +func exampleTraverse(o objects.Object, visit objects.Visitor) error { + self, ok := o.(*exampleObject) + if !ok || self.xAttr == nil { + return nil + } + return visit(self.xAttr) +} + +// exampleNew constructs a bare Example instance. +// +// CPython: Modules/_testmultiphase.c:124 Example_Type_spec (tp_new via +// PyType_GenericNew default) +func exampleNew(cls *objects.Type, _ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + o := &exampleObject{} + o.Init(cls) + return o, nil +} + +// testexportFoo ports testexport_foo: foo(i, j) returns i + j. +// +// CPython: Modules/_testmultiphase.c:308 testexport_foo +func testexportFoo(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 2 { + return nil, fmt.Errorf("TypeError: foo() takes exactly 2 arguments (%d given)", len(args)) + } + i, ok := args[0].(*objects.Int) + if !ok { + return nil, fmt.Errorf("TypeError: an integer is required (got type %s)", args[0].Type().Name) + } + j, ok := args[1].(*objects.Int) + if !ok { + return nil, fmt.Errorf("TypeError: an integer is required (got type %s)", args[1].Type().Name) + } + iv, _ := i.Int64() + jv, _ := j.Int64() + return objects.NewInt(iv + jv), nil +} + +// callStateRegistrationFunc ports call_state_registration_func. gopy has +// no per-module C state registry (PyState_FindModule / PyState_AddModule +// / PyState_RemoveModule), so the lookup case returns None and the +// add/remove cases are no-ops; the function exists only so the main +// module's surface matches the extension. +// +// CPython: Modules/_testmultiphase.c:328 call_state_registration_func +func callStateRegistrationFunc(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: call_state_registration_func() takes exactly 1 argument (%d given)", len(args)) + } + if _, ok := args[0].(*objects.Int); !ok { + return nil, fmt.Errorf("TypeError: an integer is required (got type %s)", args[0].Type().Name) + } + return objects.None(), nil +} + +func init() { + // CPython: Modules/_testmultiphase.c:114 Example_Type_slots + exampleType = objects.NewType("Example", []*objects.Type{objects.ObjectType()}) + exampleType.Module = "_testimportexec" + exampleType.TpFlags |= objects.TpFlagHaveGC + exampleType.TpNew = exampleNew + exampleType.Getattro = exampleGetattro + exampleType.Setattro = exampleSetattro + exampleType.TpTraverse = exampleTraverse + objects.SetTypeDescr(exampleType, "demo", objects.NewMethodDescr(exampleType, "demo", exampleDemo)) + + // CPython: Modules/_testmultiphase.c:361 Str_Type_slots (Py_tp_base + // filled with &PyUnicode_Type in execfunc). + strType = objects.NewType("Str", []*objects.Type{objects.StrType()}) + strType.Module = "_testimportexec" + strType.TpFlags |= objects.TpFlagBasetype + + // CPython: Modules/_testmultiphase.c:399 PyErr_NewException + errorType = pyerrors.NewExcType("error", []*objects.Type{pyerrors.PyExc_Exception}) + errorType.Module = "_testimportexec" +} + +// buildModule assembles the _testmultiphase main module: the exported +// methods plus the Example/error/Str types and the int_const/str_const +// constants execfunc installs. +// +// CPython: Modules/_testmultiphase.c:392 execfunc +// CPython: Modules/_testmultiphase.c:444 main_def +func buildModule() (*objects.Module, error) { + m := objects.NewModule("_testmultiphase") + d := m.Dict() + + // CPython: Modules/_testmultiphase.c:374 testexport_methods + methods := []struct { + name string + fn func([]objects.Object, map[string]objects.Object) (objects.Object, error) + }{ + {"foo", testexportFoo}, + {"call_state_registration_func", callStateRegistrationFunc}, + } + for _, mm := range methods { + if err := d.SetItem(objects.NewStr(mm.name), objects.NewBuiltinFunction(mm.name, mm.fn)); err != nil { + return nil, err + } + } + + if err := d.SetItem(objects.NewStr("Example"), exampleType); err != nil { + return nil, err + } + if err := d.SetItem(objects.NewStr("error"), errorType); err != nil { + return nil, err + } + if err := d.SetItem(objects.NewStr("Str"), strType); err != nil { + return nil, err + } + // CPython: Modules/_testmultiphase.c:415 PyModule_AddIntConstant int_const 1969 + if err := d.SetItem(objects.NewStr("int_const"), objects.NewInt(1969)); err != nil { + return nil, err + } + // CPython: Modules/_testmultiphase.c:419 PyModule_AddStringConstant str_const + if err := d.SetItem(objects.NewStr("str_const"), objects.NewStr("something different")); err != nil { + return nil, err + } + return m, nil +} diff --git a/stdlib/importlib/__init__.py b/stdlib/importlib/__init__.py index 6b3e6d19..269fbeff 100644 --- a/stdlib/importlib/__init__.py +++ b/stdlib/importlib/__init__.py @@ -13,6 +13,12 @@ from . import machinery # bind importlib.machinery attribute eagerly +# CPython re-exports the bootstrap __import__ here (Lib/importlib/__init__.py +# `from ._bootstrap import __import__`). gopy's bootstrap lives Go-side and +# is what builtins.__import__ already points at, so re-export that to keep +# the public `importlib.__import__` surface. +from builtins import __import__ + __all__ = ['import_module', 'invalidate_caches', 'machinery', 'reload'] diff --git a/stdlib/test/test_importlib/__init__.py b/stdlib/test/test_importlib/__init__.py new file mode 100644 index 00000000..4b16ecc3 --- /dev/null +++ b/stdlib/test/test_importlib/__init__.py @@ -0,0 +1,5 @@ +import os +from test.support import load_package_tests + +def load_tests(*args): + return load_package_tests(os.path.dirname(__file__), *args) diff --git a/stdlib/test/test_importlib/__main__.py b/stdlib/test/test_importlib/__main__.py new file mode 100644 index 00000000..40a23a29 --- /dev/null +++ b/stdlib/test/test_importlib/__main__.py @@ -0,0 +1,4 @@ +from . import load_tests +import unittest + +unittest.main() diff --git a/stdlib/test/test_importlib/abc.py b/stdlib/test/test_importlib/abc.py new file mode 100644 index 00000000..5d4b9587 --- /dev/null +++ b/stdlib/test/test_importlib/abc.py @@ -0,0 +1,93 @@ +import abc + + +class FinderTests(metaclass=abc.ABCMeta): + + """Basic tests for a finder to pass.""" + + @abc.abstractmethod + def test_module(self): + # Test importing a top-level module. + pass + + @abc.abstractmethod + def test_package(self): + # Test importing a package. + pass + + @abc.abstractmethod + def test_module_in_package(self): + # Test importing a module contained within a package. + # A value for 'path' should be used if for a meta_path finder. + pass + + @abc.abstractmethod + def test_package_in_package(self): + # Test importing a subpackage. + # A value for 'path' should be used if for a meta_path finder. + pass + + @abc.abstractmethod + def test_package_over_module(self): + # Test that packages are chosen over modules. + pass + + @abc.abstractmethod + def test_failure(self): + # Test trying to find a module that cannot be handled. + pass + + +class LoaderTests(metaclass=abc.ABCMeta): + + @abc.abstractmethod + def test_module(self): + """A module should load without issue. + + After the loader returns the module should be in sys.modules. + + Attributes to verify: + + * __file__ + * __loader__ + * __name__ + * No __path__ + + """ + pass + + @abc.abstractmethod + def test_package(self): + """Loading a package should work. + + After the loader returns the module should be in sys.modules. + + Attributes to verify: + + * __name__ + * __file__ + * __package__ + * __path__ + * __loader__ + + """ + pass + + @abc.abstractmethod + def test_lacking_parent(self): + """A loader should not be dependent on it's parent package being + imported.""" + pass + + @abc.abstractmethod + def test_state_after_failure(self): + """If a module is already in sys.modules and a reload fails + (e.g. a SyntaxError), the module should be in the state it was before + the reload began.""" + pass + + @abc.abstractmethod + def test_unloadable(self): + """Test ImportError is raised when the loader is asked to load a module + it can't.""" + pass diff --git a/stdlib/test/test_importlib/builtin/__init__.py b/stdlib/test/test_importlib/builtin/__init__.py new file mode 100644 index 00000000..4b16ecc3 --- /dev/null +++ b/stdlib/test/test_importlib/builtin/__init__.py @@ -0,0 +1,5 @@ +import os +from test.support import load_package_tests + +def load_tests(*args): + return load_package_tests(os.path.dirname(__file__), *args) diff --git a/stdlib/test/test_importlib/builtin/__main__.py b/stdlib/test/test_importlib/builtin/__main__.py new file mode 100644 index 00000000..40a23a29 --- /dev/null +++ b/stdlib/test/test_importlib/builtin/__main__.py @@ -0,0 +1,4 @@ +from . import load_tests +import unittest + +unittest.main() diff --git a/stdlib/test/test_importlib/builtin/test_finder.py b/stdlib/test/test_importlib/builtin/test_finder.py new file mode 100644 index 00000000..1fb1d2f9 --- /dev/null +++ b/stdlib/test/test_importlib/builtin/test_finder.py @@ -0,0 +1,46 @@ +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +import sys +import unittest + + +@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module') +class FindSpecTests(abc.FinderTests): + + """Test find_spec() for built-in modules.""" + + def test_module(self): + # Common case. + with util.uncache(util.BUILTINS.good_name): + found = self.machinery.BuiltinImporter.find_spec(util.BUILTINS.good_name) + self.assertTrue(found) + self.assertEqual(found.origin, 'built-in') + + # Built-in modules cannot be a package. + test_package = None + + # Built-in modules cannot be in a package. + test_module_in_package = None + + # Built-in modules cannot be a package. + test_package_in_package = None + + # Built-in modules cannot be a package. + test_package_over_module = None + + def test_failure(self): + name = 'importlib' + assert name not in sys.builtin_module_names + spec = self.machinery.BuiltinImporter.find_spec(name) + self.assertIsNone(spec) + + +(Frozen_FindSpecTests, + Source_FindSpecTests + ) = util.test_both(FindSpecTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/builtin/test_loader.py b/stdlib/test/test_importlib/builtin/test_loader.py new file mode 100644 index 00000000..7e9d1b19 --- /dev/null +++ b/stdlib/test/test_importlib/builtin/test_loader.py @@ -0,0 +1,110 @@ +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +import sys +import types +import unittest +import warnings + +@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module') +class LoaderTests(abc.LoaderTests): + + """Test load_module() for built-in modules.""" + + def setUp(self): + self.verification = {'__name__': 'errno', '__package__': '', + '__loader__': self.machinery.BuiltinImporter} + + def verify(self, module): + """Verify that the module matches against what it should have.""" + self.assertIsInstance(module, types.ModuleType) + for attr, value in self.verification.items(): + self.assertEqual(getattr(module, attr), value) + self.assertIn(module.__name__, sys.modules) + + def load_module(self, name): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + return self.machinery.BuiltinImporter.load_module(name) + + def test_module(self): + # Common case. + with util.uncache(util.BUILTINS.good_name): + module = self.load_module(util.BUILTINS.good_name) + self.verify(module) + + # Built-in modules cannot be a package. + test_package = test_lacking_parent = None + + # No way to force an import failure. + test_state_after_failure = None + + def test_module_reuse(self): + # Test that the same module is used in a reload. + with util.uncache(util.BUILTINS.good_name): + module1 = self.load_module(util.BUILTINS.good_name) + module2 = self.load_module(util.BUILTINS.good_name) + self.assertIs(module1, module2) + + def test_unloadable(self): + name = 'dssdsdfff' + assert name not in sys.builtin_module_names + with self.assertRaises(ImportError) as cm: + self.load_module(name) + self.assertEqual(cm.exception.name, name) + + def test_already_imported(self): + # Using the name of a module already imported but not a built-in should + # still fail. + module_name = 'builtin_reload_test' + assert module_name not in sys.builtin_module_names + with util.uncache(module_name): + module = types.ModuleType(module_name) + sys.modules[module_name] = module + with self.assertRaises(ImportError) as cm: + self.load_module(module_name) + self.assertEqual(cm.exception.name, module_name) + + +(Frozen_LoaderTests, + Source_LoaderTests + ) = util.test_both(LoaderTests, machinery=machinery) + + +@unittest.skipIf(util.BUILTINS.good_name is None, 'no reasonable builtin module') +class InspectLoaderTests: + + """Tests for InspectLoader methods for BuiltinImporter.""" + + def test_get_code(self): + # There is no code object. + result = self.machinery.BuiltinImporter.get_code(util.BUILTINS.good_name) + self.assertIsNone(result) + + def test_get_source(self): + # There is no source. + result = self.machinery.BuiltinImporter.get_source(util.BUILTINS.good_name) + self.assertIsNone(result) + + def test_is_package(self): + # Cannot be a package. + result = self.machinery.BuiltinImporter.is_package(util.BUILTINS.good_name) + self.assertFalse(result) + + @unittest.skipIf(util.BUILTINS.bad_name is None, 'all modules are built in') + def test_not_builtin(self): + # Modules not built-in should raise ImportError. + for meth_name in ('get_code', 'get_source', 'is_package'): + method = getattr(self.machinery.BuiltinImporter, meth_name) + with self.assertRaises(ImportError) as cm: + method(util.BUILTINS.bad_name) + + +(Frozen_InspectLoaderTests, + Source_InspectLoaderTests + ) = util.test_both(InspectLoaderTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/extension/__init__.py b/stdlib/test/test_importlib/extension/__init__.py new file mode 100644 index 00000000..4b16ecc3 --- /dev/null +++ b/stdlib/test/test_importlib/extension/__init__.py @@ -0,0 +1,5 @@ +import os +from test.support import load_package_tests + +def load_tests(*args): + return load_package_tests(os.path.dirname(__file__), *args) diff --git a/stdlib/test/test_importlib/extension/__main__.py b/stdlib/test/test_importlib/extension/__main__.py new file mode 100644 index 00000000..40a23a29 --- /dev/null +++ b/stdlib/test/test_importlib/extension/__main__.py @@ -0,0 +1,4 @@ +from . import load_tests +import unittest + +unittest.main() diff --git a/stdlib/test/test_importlib/extension/_test_nonmodule_cases.py b/stdlib/test/test_importlib/extension/_test_nonmodule_cases.py new file mode 100644 index 00000000..8ffd18d2 --- /dev/null +++ b/stdlib/test/test_importlib/extension/_test_nonmodule_cases.py @@ -0,0 +1,44 @@ +import types +import unittest +from test.test_importlib import util + +machinery = util.import_importlib('importlib.machinery') + +from test.test_importlib.extension.test_loader import MultiPhaseExtensionModuleTests + + +class NonModuleExtensionTests: + setUp = MultiPhaseExtensionModuleTests.setUp + load_module_by_name = MultiPhaseExtensionModuleTests.load_module_by_name + + def _test_nonmodule(self): + # Test returning a non-module object from create works. + name = self.name + '_nonmodule' + mod = self.load_module_by_name(name) + self.assertNotEqual(type(mod), type(unittest)) + self.assertEqual(mod.three, 3) + + # issue 27782 + def test_nonmodule_with_methods(self): + # Test creating a non-module object with methods defined. + name = self.name + '_nonmodule_with_methods' + mod = self.load_module_by_name(name) + self.assertNotEqual(type(mod), type(unittest)) + self.assertEqual(mod.three, 3) + self.assertEqual(mod.bar(10, 1), 9) + + def test_null_slots(self): + # Test that NULL slots aren't a problem. + name = self.name + '_null_slots' + module = self.load_module_by_name(name) + self.assertIsInstance(module, types.ModuleType) + self.assertEqual(module.__name__, name) + + +(Frozen_NonModuleExtensionTests, + Source_NonModuleExtensionTests + ) = util.test_both(NonModuleExtensionTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/extension/test_case_sensitivity.py b/stdlib/test/test_importlib/extension/test_case_sensitivity.py new file mode 100644 index 00000000..51837191 --- /dev/null +++ b/stdlib/test/test_importlib/extension/test_case_sensitivity.py @@ -0,0 +1,48 @@ +from test.support import os_helper +import unittest +import sys +from test.test_importlib import util + +importlib = util.import_importlib('importlib') +machinery = util.import_importlib('importlib.machinery') + + +@unittest.skipIf(util.EXTENSIONS is None or util.EXTENSIONS.filename is None, + 'dynamic loading not supported or test module not available') +@util.case_insensitive_tests +class ExtensionModuleCaseSensitivityTest(util.CASEOKTestBase): + + def find_spec(self): + good_name = util.EXTENSIONS.name + bad_name = good_name.upper() + assert good_name != bad_name + finder = self.machinery.FileFinder(util.EXTENSIONS.path, + (self.machinery.ExtensionFileLoader, + self.machinery.EXTENSION_SUFFIXES)) + return finder.find_spec(bad_name) + + @unittest.skipIf(sys.flags.ignore_environment, 'ignore_environment flag was set') + def test_case_sensitive(self): + with os_helper.EnvironmentVarGuard() as env: + env.unset('PYTHONCASEOK') + self.caseok_env_changed(should_exist=False) + spec = self.find_spec() + self.assertIsNone(spec) + + @unittest.skipIf(sys.flags.ignore_environment, 'ignore_environment flag was set') + def test_case_insensitivity(self): + with os_helper.EnvironmentVarGuard() as env: + env.set('PYTHONCASEOK', '1') + self.caseok_env_changed(should_exist=True) + spec = self.find_spec() + self.assertTrue(spec) + + +(Frozen_ExtensionCaseSensitivity, + Source_ExtensionCaseSensitivity + ) = util.test_both(ExtensionModuleCaseSensitivityTest, importlib=importlib, + machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/extension/test_finder.py b/stdlib/test/test_importlib/extension/test_finder.py new file mode 100644 index 00000000..cdc8884d --- /dev/null +++ b/stdlib/test/test_importlib/extension/test_finder.py @@ -0,0 +1,69 @@ +from test.support import is_apple_mobile +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +import unittest +import sys + + +class FinderTests(abc.FinderTests): + + """Test the finder for extension modules.""" + + def setUp(self): + if not self.machinery.EXTENSION_SUFFIXES or not util.EXTENSIONS: + raise unittest.SkipTest("Requires dynamic loading support.") + if util.EXTENSIONS.name in sys.builtin_module_names: + raise unittest.SkipTest( + f"{util.EXTENSIONS.name} is a builtin module" + ) + + def find_spec(self, fullname): + if is_apple_mobile: + # Apple mobile platforms require a specialist loader that uses + # .fwork files as placeholders for the true `.so` files. + loaders = [ + ( + self.machinery.AppleFrameworkLoader, + [ + ext.replace(".so", ".fwork") + for ext in self.machinery.EXTENSION_SUFFIXES + ] + ) + ] + else: + loaders = [ + ( + self.machinery.ExtensionFileLoader, + self.machinery.EXTENSION_SUFFIXES + ) + ] + + importer = self.machinery.FileFinder(util.EXTENSIONS.path, *loaders) + + return importer.find_spec(fullname) + + def test_module(self): + self.assertTrue(self.find_spec(util.EXTENSIONS.name)) + + # No extension module as an __init__ available for testing. + test_package = test_package_in_package = None + + # No extension module in a package available for testing. + test_module_in_package = None + + # Extension modules cannot be an __init__ for a package. + test_package_over_module = None + + def test_failure(self): + self.assertIsNone(self.find_spec('asdfjkl;')) + + +(Frozen_FinderTests, + Source_FinderTests + ) = util.test_both(FinderTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/extension/test_loader.py b/stdlib/test/test_importlib/extension/test_loader.py new file mode 100644 index 00000000..0dd21e07 --- /dev/null +++ b/stdlib/test/test_importlib/extension/test_loader.py @@ -0,0 +1,392 @@ +from test.support import is_apple_mobile +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +import os.path +import sys +import types +import unittest +import warnings +import importlib.util +import importlib +from test import support +from test.support import MISSING_C_DOCSTRINGS, script_helper + + +class LoaderTests: + + """Test ExtensionFileLoader.""" + + def setUp(self): + if not self.machinery.EXTENSION_SUFFIXES or not util.EXTENSIONS: + raise unittest.SkipTest("Requires dynamic loading support.") + if util.EXTENSIONS.name in sys.builtin_module_names: + raise unittest.SkipTest( + f"{util.EXTENSIONS.name} is a builtin module" + ) + + # Apple extensions must be distributed as frameworks. This requires + # a specialist loader. + if is_apple_mobile: + self.LoaderClass = self.machinery.AppleFrameworkLoader + else: + self.LoaderClass = self.machinery.ExtensionFileLoader + + self.loader = self.LoaderClass(util.EXTENSIONS.name, util.EXTENSIONS.file_path) + + def load_module(self, fullname): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + return self.loader.load_module(fullname) + + def test_equality(self): + other = self.LoaderClass(util.EXTENSIONS.name, util.EXTENSIONS.file_path) + self.assertEqual(self.loader, other) + + def test_inequality(self): + other = self.LoaderClass('_' + util.EXTENSIONS.name, util.EXTENSIONS.file_path) + self.assertNotEqual(self.loader, other) + + def test_load_module_API(self): + # Test the default argument for load_module(). + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + self.loader.load_module() + self.loader.load_module(None) + with self.assertRaises(ImportError): + self.load_module('XXX') + + def test_module(self): + with util.uncache(util.EXTENSIONS.name): + module = self.load_module(util.EXTENSIONS.name) + for attr, value in [('__name__', util.EXTENSIONS.name), + ('__file__', util.EXTENSIONS.file_path), + ('__package__', '')]: + self.assertEqual(getattr(module, attr), value) + self.assertIn(util.EXTENSIONS.name, sys.modules) + self.assertIsInstance(module.__loader__, self.LoaderClass) + + # No extension module as __init__ available for testing. + test_package = None + + # No extension module in a package available for testing. + test_lacking_parent = None + + # No easy way to trigger a failure after a successful import. + test_state_after_failure = None + + def test_unloadable(self): + name = 'asdfjkl;' + with self.assertRaises(ImportError) as cm: + self.load_module(name) + self.assertEqual(cm.exception.name, name) + + def test_module_reuse(self): + with util.uncache(util.EXTENSIONS.name): + module1 = self.load_module(util.EXTENSIONS.name) + module2 = self.load_module(util.EXTENSIONS.name) + self.assertIs(module1, module2) + + def test_is_package(self): + self.assertFalse(self.loader.is_package(util.EXTENSIONS.name)) + for suffix in self.machinery.EXTENSION_SUFFIXES: + path = os.path.join('some', 'path', 'pkg', '__init__' + suffix) + loader = self.LoaderClass('pkg', path) + self.assertTrue(loader.is_package('pkg')) + + +(Frozen_LoaderTests, + Source_LoaderTests + ) = util.test_both(LoaderTests, machinery=machinery) + + +class SinglePhaseExtensionModuleTests(abc.LoaderTests): + # Test loading extension modules without multi-phase initialization. + + def setUp(self): + if not self.machinery.EXTENSION_SUFFIXES or not util.EXTENSIONS: + raise unittest.SkipTest("Requires dynamic loading support.") + + # Apple extensions must be distributed as frameworks. This requires + # a specialist loader. + if is_apple_mobile: + self.LoaderClass = self.machinery.AppleFrameworkLoader + else: + self.LoaderClass = self.machinery.ExtensionFileLoader + + self.name = '_testsinglephase' + if self.name in sys.builtin_module_names: + raise unittest.SkipTest( + f"{self.name} is a builtin module" + ) + finder = self.machinery.FileFinder(None) + self.spec = importlib.util.find_spec(self.name) + assert self.spec + + self.loader = self.LoaderClass(self.name, self.spec.origin) + + def load_module(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + return self.loader.load_module(self.name) + + def load_module_by_name(self, fullname): + # Load a module from the test extension by name. + origin = self.spec.origin + loader = self.LoaderClass(fullname, origin) + spec = importlib.util.spec_from_loader(fullname, loader) + module = importlib.util.module_from_spec(spec) + loader.exec_module(module) + return module + + def test_module(self): + # Test loading an extension module. + with util.uncache(self.name): + module = self.load_module() + for attr, value in [('__name__', self.name), + ('__file__', self.spec.origin), + ('__package__', '')]: + self.assertEqual(getattr(module, attr), value) + with self.assertRaises(AttributeError): + module.__path__ + self.assertIs(module, sys.modules[self.name]) + self.assertIsInstance(module.__loader__, self.LoaderClass) + + # No extension module as __init__ available for testing. + test_package = None + + # No extension module in a package available for testing. + test_lacking_parent = None + + # No easy way to trigger a failure after a successful import. + test_state_after_failure = None + + def test_unloadable(self): + name = 'asdfjkl;' + with self.assertRaises(ImportError) as cm: + self.load_module_by_name(name) + self.assertEqual(cm.exception.name, name) + + def test_unloadable_nonascii(self): + # Test behavior with nonexistent module with non-ASCII name. + name = 'fo\xf3' + with self.assertRaises(ImportError) as cm: + self.load_module_by_name(name) + self.assertEqual(cm.exception.name, name) + + # It may make sense to add the equivalent to + # the following MultiPhaseExtensionModuleTests tests: + # + # * test_nonmodule + # * test_nonmodule_with_methods + # * test_bad_modules + # * test_nonascii + + +(Frozen_SinglePhaseExtensionModuleTests, + Source_SinglePhaseExtensionModuleTests + ) = util.test_both(SinglePhaseExtensionModuleTests, machinery=machinery) + + +class MultiPhaseExtensionModuleTests(abc.LoaderTests): + # Test loading extension modules with multi-phase initialization (PEP 489). + + def setUp(self): + if not self.machinery.EXTENSION_SUFFIXES or not util.EXTENSIONS: + raise unittest.SkipTest("Requires dynamic loading support.") + + # Apple extensions must be distributed as frameworks. This requires + # a specialist loader. + if is_apple_mobile: + self.LoaderClass = self.machinery.AppleFrameworkLoader + else: + self.LoaderClass = self.machinery.ExtensionFileLoader + + self.name = '_testmultiphase' + if self.name in sys.builtin_module_names: + raise unittest.SkipTest( + f"{self.name} is a builtin module" + ) + finder = self.machinery.FileFinder(None) + self.spec = importlib.util.find_spec(self.name) + assert self.spec + self.loader = self.LoaderClass(self.name, self.spec.origin) + + def load_module(self): + # Load the module from the test extension. + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + return self.loader.load_module(self.name) + + def load_module_by_name(self, fullname): + # Load a module from the test extension by name. + origin = self.spec.origin + loader = self.LoaderClass(fullname, origin) + spec = importlib.util.spec_from_loader(fullname, loader) + module = importlib.util.module_from_spec(spec) + loader.exec_module(module) + return module + + # No extension module as __init__ available for testing. + test_package = None + + # No extension module in a package available for testing. + test_lacking_parent = None + + # Handling failure on reload is the up to the module. + test_state_after_failure = None + + def test_module(self): + # Test loading an extension module. + with util.uncache(self.name): + module = self.load_module() + for attr, value in [('__name__', self.name), + ('__file__', self.spec.origin), + ('__package__', '')]: + self.assertEqual(getattr(module, attr), value) + with self.assertRaises(AttributeError): + module.__path__ + self.assertIs(module, sys.modules[self.name]) + self.assertIsInstance(module.__loader__, self.LoaderClass) + + def test_functionality(self): + # Test basic functionality of stuff defined in an extension module. + with util.uncache(self.name): + module = self.load_module() + self.assertIsInstance(module, types.ModuleType) + ex = module.Example() + self.assertEqual(ex.demo('abcd'), 'abcd') + self.assertEqual(ex.demo(), None) + with self.assertRaises(AttributeError): + ex.abc + ex.abc = 0 + self.assertEqual(ex.abc, 0) + self.assertEqual(module.foo(9, 9), 18) + self.assertIsInstance(module.Str(), str) + self.assertEqual(module.Str(1) + '23', '123') + with self.assertRaises(module.error): + raise module.error() + self.assertEqual(module.int_const, 1969) + self.assertEqual(module.str_const, 'something different') + + def test_reload(self): + # Test that reload didn't re-set the module's attributes. + with util.uncache(self.name): + module = self.load_module() + ex_class = module.Example + importlib.reload(module) + self.assertIs(ex_class, module.Example) + + def test_try_registration(self): + # Assert that the PyState_{Find,Add,Remove}Module C API doesn't work. + with util.uncache(self.name): + module = self.load_module() + with self.subTest('PyState_FindModule'): + self.assertEqual(module.call_state_registration_func(0), None) + with self.subTest('PyState_AddModule'): + with self.assertRaises(SystemError): + module.call_state_registration_func(1) + with self.subTest('PyState_RemoveModule'): + with self.assertRaises(SystemError): + module.call_state_registration_func(2) + + def test_load_submodule(self): + # Test loading a simulated submodule. + module = self.load_module_by_name('pkg.' + self.name) + self.assertIsInstance(module, types.ModuleType) + self.assertEqual(module.__name__, 'pkg.' + self.name) + self.assertEqual(module.str_const, 'something different') + + def test_load_short_name(self): + # Test loading module with a one-character name. + module = self.load_module_by_name('x') + self.assertIsInstance(module, types.ModuleType) + self.assertEqual(module.__name__, 'x') + self.assertEqual(module.str_const, 'something different') + self.assertNotIn('x', sys.modules) + + def test_load_twice(self): + # Test that 2 loads result in 2 module objects. + module1 = self.load_module_by_name(self.name) + module2 = self.load_module_by_name(self.name) + self.assertIsNot(module1, module2) + + def test_unloadable(self): + # Test nonexistent module. + name = 'asdfjkl;' + with self.assertRaises(ImportError) as cm: + self.load_module_by_name(name) + self.assertEqual(cm.exception.name, name) + + def test_unloadable_nonascii(self): + # Test behavior with nonexistent module with non-ASCII name. + name = 'fo\xf3' + with self.assertRaises(ImportError) as cm: + self.load_module_by_name(name) + self.assertEqual(cm.exception.name, name) + + def test_bad_modules(self): + # Test SystemError is raised for misbehaving extensions. + for name_base in [ + 'bad_slot_large', + 'bad_slot_negative', + 'create_int_with_state', + 'negative_size', + 'export_null', + 'export_uninitialized', + 'export_raise', + 'export_unreported_exception', + 'create_null', + 'create_raise', + 'create_unreported_exception', + 'nonmodule_with_exec_slots', + 'exec_err', + 'exec_raise', + 'exec_unreported_exception', + 'multiple_create_slots', + 'multiple_multiple_interpreters_slots', + ]: + with self.subTest(name_base): + name = self.name + '_' + name_base + with self.assertRaises(SystemError) as cm: + self.load_module_by_name(name) + + # If there is an unreported exception, it should be chained + # with the `SystemError`. + if "unreported_exception" in name_base: + self.assertIsNotNone(cm.exception.__cause__) + + def test_nonascii(self): + # Test that modules with non-ASCII names can be loaded. + # punycode behaves slightly differently in some-ASCII and no-ASCII + # cases, so test both. + cases = [ + (self.name + '_zkou\u0161ka_na\u010dten\xed', 'Czech'), + ('\uff3f\u30a4\u30f3\u30dd\u30fc\u30c8\u30c6\u30b9\u30c8', + 'Japanese'), + ] + for name, lang in cases: + with self.subTest(name): + module = self.load_module_by_name(name) + self.assertEqual(module.__name__, name) + if not MISSING_C_DOCSTRINGS: + self.assertEqual(module.__doc__, "Module named in %s" % lang) + + +(Frozen_MultiPhaseExtensionModuleTests, + Source_MultiPhaseExtensionModuleTests + ) = util.test_both(MultiPhaseExtensionModuleTests, machinery=machinery) + + +class NonModuleExtensionTests(unittest.TestCase): + def test_nonmodule_cases(self): + # The test cases in this file cause the GIL to be enabled permanently + # in free-threaded builds, so they are run in a subprocess to isolate + # this effect. + script = support.findfile("test_importlib/extension/_test_nonmodule_cases.py") + script_helper.run_test_script(script) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/extension/test_path_hook.py b/stdlib/test/test_importlib/extension/test_path_hook.py new file mode 100644 index 00000000..941dcd54 --- /dev/null +++ b/stdlib/test/test_importlib/extension/test_path_hook.py @@ -0,0 +1,33 @@ +from test.test_importlib import util + +machinery = util.import_importlib('importlib.machinery') + +import unittest + + +@unittest.skipIf(util.EXTENSIONS is None or util.EXTENSIONS.filename is None, + 'dynamic loading not supported or test module not available') +class PathHookTests: + + """Test the path hook for extension modules.""" + # XXX Should it only succeed for pre-existing directories? + # XXX Should it only work for directories containing an extension module? + + def hook(self, entry): + return self.machinery.FileFinder.path_hook( + (self.machinery.ExtensionFileLoader, + self.machinery.EXTENSION_SUFFIXES))(entry) + + def test_success(self): + # Path hook should handle a directory where a known extension module + # exists. + self.assertHasAttr(self.hook(util.EXTENSIONS.path), 'find_spec') + + +(Frozen_PathHooksTests, + Source_PathHooksTests + ) = util.test_both(PathHookTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/frozen/__init__.py b/stdlib/test/test_importlib/frozen/__init__.py new file mode 100644 index 00000000..4b16ecc3 --- /dev/null +++ b/stdlib/test/test_importlib/frozen/__init__.py @@ -0,0 +1,5 @@ +import os +from test.support import load_package_tests + +def load_tests(*args): + return load_package_tests(os.path.dirname(__file__), *args) diff --git a/stdlib/test/test_importlib/frozen/__main__.py b/stdlib/test/test_importlib/frozen/__main__.py new file mode 100644 index 00000000..40a23a29 --- /dev/null +++ b/stdlib/test/test_importlib/frozen/__main__.py @@ -0,0 +1,4 @@ +from . import load_tests +import unittest + +unittest.main() diff --git a/stdlib/test/test_importlib/frozen/test_finder.py b/stdlib/test/test_importlib/frozen/test_finder.py new file mode 100644 index 00000000..971cc28b --- /dev/null +++ b/stdlib/test/test_importlib/frozen/test_finder.py @@ -0,0 +1,183 @@ +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +import os.path +import unittest + +from test.support import import_helper, REPO_ROOT, STDLIB_DIR + + +def resolve_stdlib_file(name, ispkg=False): + assert name + if ispkg: + return os.path.join(STDLIB_DIR, *name.split('.'), '__init__.py') + else: + return os.path.join(STDLIB_DIR, *name.split('.')) + '.py' + + +class FindSpecTests(abc.FinderTests): + + """Test finding frozen modules.""" + + def find(self, name, **kwargs): + finder = self.machinery.FrozenImporter + with import_helper.frozen_modules(): + return finder.find_spec(name, **kwargs) + + def check_basic(self, spec, name, ispkg=False): + self.assertEqual(spec.name, name) + self.assertIs(spec.loader, self.machinery.FrozenImporter) + self.assertEqual(spec.origin, 'frozen') + self.assertFalse(spec.has_location) + if ispkg: + self.assertIsNotNone(spec.submodule_search_locations) + else: + self.assertIsNone(spec.submodule_search_locations) + self.assertIsNotNone(spec.loader_state) + + def check_loader_state(self, spec, origname=None, filename=None): + if not filename: + if not origname: + origname = spec.name + filename = resolve_stdlib_file(origname) + + actual = dict(vars(spec.loader_state)) + + # Check the rest of spec.loader_state. + expected = dict( + origname=origname, + filename=filename if origname else None, + ) + self.assertDictEqual(actual, expected) + + def check_search_locations(self, spec): + """This is only called when testing packages.""" + missing = object() + filename = getattr(spec.loader_state, 'filename', missing) + origname = getattr(spec.loader_state, 'origname', None) + if not origname or filename is missing: + # We deal with this in check_loader_state(). + return + if not filename: + expected = [] + elif origname != spec.name and not origname.startswith('<'): + expected = [] + else: + expected = [os.path.dirname(filename)] + self.assertListEqual(spec.submodule_search_locations, expected) + + def test_module(self): + modules = [ + '__hello__', + '__phello__.spam', + '__phello__.ham.eggs', + ] + for name in modules: + with self.subTest(f'{name} -> {name}'): + spec = self.find(name) + self.check_basic(spec, name) + self.check_loader_state(spec) + modules = { + '__hello_alias__': '__hello__', + '_frozen_importlib': 'importlib._bootstrap', + } + for name, origname in modules.items(): + with self.subTest(f'{name} -> {origname}'): + spec = self.find(name) + self.check_basic(spec, name) + self.check_loader_state(spec, origname) + modules = [ + '__phello__.__init__', + '__phello__.ham.__init__', + ] + for name in modules: + origname = '<' + name.rpartition('.')[0] + filename = resolve_stdlib_file(name) + with self.subTest(f'{name} -> {origname}'): + spec = self.find(name) + self.check_basic(spec, name) + self.check_loader_state(spec, origname, filename) + modules = { + '__hello_only__': ('Tools', 'freeze', 'flag.py'), + } + for name, path in modules.items(): + origname = None + filename = os.path.join(REPO_ROOT, *path) + with self.subTest(f'{name} -> {filename}'): + spec = self.find(name) + self.check_basic(spec, name) + self.check_loader_state(spec, origname, filename) + + def test_package(self): + packages = [ + '__phello__', + '__phello__.ham', + ] + for name in packages: + filename = resolve_stdlib_file(name, ispkg=True) + with self.subTest(f'{name} -> {name}'): + spec = self.find(name) + self.check_basic(spec, name, ispkg=True) + self.check_loader_state(spec, name, filename) + self.check_search_locations(spec) + packages = { + '__phello_alias__': '__hello__', + } + for name, origname in packages.items(): + filename = resolve_stdlib_file(origname, ispkg=False) + with self.subTest(f'{name} -> {origname}'): + spec = self.find(name) + self.check_basic(spec, name, ispkg=True) + self.check_loader_state(spec, origname, filename) + self.check_search_locations(spec) + + # These are covered by test_module() and test_package(). + test_module_in_package = None + test_package_in_package = None + + # No easy way to test. + test_package_over_module = None + + def test_path_ignored(self): + for name in ('__hello__', '__phello__', '__phello__.spam'): + actual = self.find(name) + for path in (None, object(), '', 'eggs', [], [''], ['eggs']): + with self.subTest((name, path)): + spec = self.find(name, path=path) + self.assertEqual(spec, actual) + + def test_target_ignored(self): + imported = ('__hello__', '__phello__') + with import_helper.CleanImport(*imported, usefrozen=True): + import __hello__ as match + import __phello__ as nonmatch + name = '__hello__' + actual = self.find(name) + for target in (None, match, nonmatch, object(), 'not-a-module-object'): + with self.subTest(target): + spec = self.find(name, target=target) + self.assertEqual(spec, actual) + + def test_failure(self): + spec = self.find('') + self.assertIsNone(spec) + + def test_not_using_frozen(self): + finder = self.machinery.FrozenImporter + with import_helper.frozen_modules(enabled=False): + # both frozen and not frozen + spec1 = finder.find_spec('__hello__') + # only frozen + spec2 = finder.find_spec('__hello_only__') + self.assertIsNone(spec1) + self.assertIsNone(spec2) + + +(Frozen_FindSpecTests, + Source_FindSpecTests + ) = util.test_both(FindSpecTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/frozen/test_loader.py b/stdlib/test/test_importlib/frozen/test_loader.py new file mode 100644 index 00000000..c808bb73 --- /dev/null +++ b/stdlib/test/test_importlib/frozen/test_loader.py @@ -0,0 +1,172 @@ +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +from test.support import captured_stdout, import_helper, STDLIB_DIR +import contextlib +import os.path +import types +import unittest +import warnings + + +@contextlib.contextmanager +def deprecated(): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + yield + + +@contextlib.contextmanager +def fresh(name, *, oldapi=False): + with util.uncache(name): + with import_helper.frozen_modules(): + if oldapi: + with deprecated(): + yield + else: + yield + + +def resolve_stdlib_file(name, ispkg=False): + assert name + if ispkg: + return os.path.join(STDLIB_DIR, *name.split('.'), '__init__.py') + else: + return os.path.join(STDLIB_DIR, *name.split('.')) + '.py' + + +class ExecModuleTests(abc.LoaderTests): + + def exec_module(self, name, origname=None): + with import_helper.frozen_modules(): + is_package = self.machinery.FrozenImporter.is_package(name) + spec = self.machinery.ModuleSpec( + name, + self.machinery.FrozenImporter, + origin='frozen', + is_package=is_package, + loader_state=types.SimpleNamespace( + origname=origname or name, + filename=resolve_stdlib_file(origname or name, is_package), + ), + ) + module = types.ModuleType(name) + module.__spec__ = spec + assert not hasattr(module, 'initialized') + + with fresh(name): + self.machinery.FrozenImporter.exec_module(module) + with captured_stdout() as stdout: + module.main() + + self.assertTrue(module.initialized) + self.assertHasAttr(module, '__spec__') + self.assertEqual(module.__spec__.origin, 'frozen') + return module, stdout.getvalue() + + def test_module(self): + name = '__hello__' + module, output = self.exec_module(name) + check = {'__name__': name} + for attr, value in check.items(): + self.assertEqual(getattr(module, attr), value) + self.assertEqual(output, 'Hello world!\n') + self.assertHasAttr(module, '__spec__') + self.assertEqual(module.__spec__.loader_state.origname, name) + + def test_package(self): + name = '__phello__' + module, output = self.exec_module(name) + check = {'__name__': name} + for attr, value in check.items(): + attr_value = getattr(module, attr) + self.assertEqual(attr_value, value, + 'for {name}.{attr}, {given!r} != {expected!r}'.format( + name=name, attr=attr, given=attr_value, + expected=value)) + self.assertEqual(output, 'Hello world!\n') + self.assertEqual(module.__spec__.loader_state.origname, name) + + def test_lacking_parent(self): + name = '__phello__.spam' + with util.uncache('__phello__'): + module, output = self.exec_module(name) + check = {'__name__': name} + for attr, value in check.items(): + attr_value = getattr(module, attr) + self.assertEqual(attr_value, value, + 'for {name}.{attr}, {given} != {expected!r}'.format( + name=name, attr=attr, given=attr_value, + expected=value)) + self.assertEqual(output, 'Hello world!\n') + + def test_module_repr_indirect_through_spec(self): + name = '__hello__' + module, output = self.exec_module(name) + self.assertEqual(repr(module), + "") + + # No way to trigger an error in a frozen module. + test_state_after_failure = None + + def test_unloadable(self): + with import_helper.frozen_modules(): + assert self.machinery.FrozenImporter.find_spec('_not_real') is None + with self.assertRaises(ImportError) as cm: + self.exec_module('_not_real') + self.assertEqual(cm.exception.name, '_not_real') + + +(Frozen_ExecModuleTests, + Source_ExecModuleTests + ) = util.test_both(ExecModuleTests, machinery=machinery) + + +class InspectLoaderTests: + + """Tests for the InspectLoader methods for FrozenImporter.""" + + def test_get_code(self): + # Make sure that the code object is good. + name = '__hello__' + with import_helper.frozen_modules(): + code = self.machinery.FrozenImporter.get_code(name) + mod = types.ModuleType(name) + exec(code, mod.__dict__) + with captured_stdout() as stdout: + mod.main() + self.assertHasAttr(mod, 'initialized') + self.assertEqual(stdout.getvalue(), 'Hello world!\n') + + def test_get_source(self): + # Should always return None. + with import_helper.frozen_modules(): + result = self.machinery.FrozenImporter.get_source('__hello__') + self.assertIsNone(result) + + def test_is_package(self): + # Should be able to tell what is a package. + test_for = (('__hello__', False), ('__phello__', True), + ('__phello__.spam', False)) + for name, is_package in test_for: + with import_helper.frozen_modules(): + result = self.machinery.FrozenImporter.is_package(name) + self.assertEqual(bool(result), is_package) + + def test_failure(self): + # Raise ImportError for modules that are not frozen. + for meth_name in ('get_code', 'get_source', 'is_package'): + method = getattr(self.machinery.FrozenImporter, meth_name) + with self.assertRaises(ImportError) as cm: + with import_helper.frozen_modules(): + method('importlib') + self.assertEqual(cm.exception.name, 'importlib') + +(Frozen_ILTests, + Source_ILTests + ) = util.test_both(InspectLoaderTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/__init__.py b/stdlib/test/test_importlib/import_/__init__.py new file mode 100644 index 00000000..4b16ecc3 --- /dev/null +++ b/stdlib/test/test_importlib/import_/__init__.py @@ -0,0 +1,5 @@ +import os +from test.support import load_package_tests + +def load_tests(*args): + return load_package_tests(os.path.dirname(__file__), *args) diff --git a/stdlib/test/test_importlib/import_/__main__.py b/stdlib/test/test_importlib/import_/__main__.py new file mode 100644 index 00000000..40a23a29 --- /dev/null +++ b/stdlib/test/test_importlib/import_/__main__.py @@ -0,0 +1,4 @@ +from . import load_tests +import unittest + +unittest.main() diff --git a/stdlib/test/test_importlib/import_/test___loader__.py b/stdlib/test/test_importlib/import_/test___loader__.py new file mode 100644 index 00000000..858b37ef --- /dev/null +++ b/stdlib/test/test_importlib/import_/test___loader__.py @@ -0,0 +1,34 @@ +from importlib import machinery +import unittest + +from test.test_importlib import util + + +class SpecLoaderMock: + + def find_spec(self, fullname, path=None, target=None): + return machinery.ModuleSpec(fullname, self) + + def create_module(self, spec): + return None + + def exec_module(self, module): + pass + + +class SpecLoaderAttributeTests: + + def test___loader__(self): + loader = SpecLoaderMock() + with util.uncache('blah'), util.import_state(meta_path=[loader]): + module = self.__import__('blah') + self.assertEqual(loader, module.__loader__) + + +(Frozen_SpecTests, + Source_SpecTests + ) = util.test_both(SpecLoaderAttributeTests, __import__=util.__import__) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test___package__.py b/stdlib/test/test_importlib/import_/test___package__.py new file mode 100644 index 00000000..7130c99a --- /dev/null +++ b/stdlib/test/test_importlib/import_/test___package__.py @@ -0,0 +1,152 @@ +"""PEP 366 ("Main module explicit relative imports") specifies the +semantics for the __package__ attribute on modules. This attribute is +used, when available, to detect which package a module belongs to (instead +of using the typical __path__/__name__ test). + +""" +import unittest +import warnings +from test.test_importlib import util + + +class Using__package__: + + """Use of __package__ supersedes the use of __name__/__path__ to calculate + what package a module belongs to. The basic algorithm is [__package__]:: + + def resolve_name(name, package, level): + level -= 1 + base = package.rsplit('.', level)[0] + return '{0}.{1}'.format(base, name) + + But since there is no guarantee that __package__ has been set (or not been + set to None [None]), there has to be a way to calculate the attribute's value + [__name__]:: + + def calc_package(caller_name, has___path__): + if has__path__: + return caller_name + else: + return caller_name.rsplit('.', 1)[0] + + Then the normal algorithm for relative name imports can proceed as if + __package__ had been set. + + """ + + def import_module(self, globals_): + with self.mock_modules('pkg.__init__', 'pkg.fake') as importer: + with util.import_state(meta_path=[importer]): + self.__import__('pkg.fake') + module = self.__import__('', + globals=globals_, + fromlist=['attr'], level=2) + return module + + def test_using___package__(self): + # [__package__] + module = self.import_module({'__package__': 'pkg.fake'}) + self.assertEqual(module.__name__, 'pkg') + + def test_using___name__(self): + # [__name__] + with warnings.catch_warnings(): + warnings.simplefilter("ignore") + module = self.import_module({'__name__': 'pkg.fake', + '__path__': []}) + self.assertEqual(module.__name__, 'pkg') + + def test_warn_when_using___name__(self): + with self.assertWarns(ImportWarning): + self.import_module({'__name__': 'pkg.fake', '__path__': []}) + + def test_None_as___package__(self): + # [None] + with warnings.catch_warnings(): + warnings.simplefilter("ignore") + module = self.import_module({ + '__name__': 'pkg.fake', '__path__': [], '__package__': None }) + self.assertEqual(module.__name__, 'pkg') + + def test_spec_fallback(self): + # If __package__ isn't defined, fall back on __spec__.parent. + module = self.import_module({'__spec__': FakeSpec('pkg.fake')}) + self.assertEqual(module.__name__, 'pkg') + + def test_warn_when_package_and_spec_disagree(self): + # Raise a DeprecationWarning if __package__ != __spec__.parent. + with self.assertWarns(DeprecationWarning): + self.import_module({'__package__': 'pkg.fake', + '__spec__': FakeSpec('pkg.fakefake')}) + + def test_bad__package__(self): + globals = {'__package__': ''} + with self.assertRaises(ModuleNotFoundError): + self.__import__('', globals, {}, ['relimport'], 1) + + def test_bunk__package__(self): + globals = {'__package__': 42} + with self.assertRaises(TypeError): + self.__import__('', globals, {}, ['relimport'], 1) + + +class FakeSpec: + def __init__(self, parent): + self.parent = parent + + +class Using__package__PEP451(Using__package__): + mock_modules = util.mock_spec + + +(Frozen_UsingPackagePEP451, + Source_UsingPackagePEP451 + ) = util.test_both(Using__package__PEP451, __import__=util.__import__) + + +class Setting__package__: + + """Because __package__ is a new feature, it is not always set by a loader. + Import will set it as needed to help with the transition to relying on + __package__. + + For a top-level module, __package__ is set to None [top-level]. For a + package __name__ is used for __package__ [package]. For submodules the + value is __name__.rsplit('.', 1)[0] [submodule]. + + """ + + __import__ = util.__import__['Source'] + + # [top-level] + def test_top_level(self): + with self.mock_modules('top_level') as mock: + with util.import_state(meta_path=[mock]): + del mock['top_level'].__package__ + module = self.__import__('top_level') + self.assertEqual(module.__package__, '') + + # [package] + def test_package(self): + with self.mock_modules('pkg.__init__') as mock: + with util.import_state(meta_path=[mock]): + del mock['pkg'].__package__ + module = self.__import__('pkg') + self.assertEqual(module.__package__, 'pkg') + + # [submodule] + def test_submodule(self): + with self.mock_modules('pkg.__init__', 'pkg.mod') as mock: + with util.import_state(meta_path=[mock]): + del mock['pkg.mod'].__package__ + pkg = self.__import__('pkg.mod') + module = getattr(pkg, 'mod') + self.assertEqual(module.__package__, 'pkg') + + +class Setting__package__PEP451(Setting__package__, unittest.TestCase): + mock_modules = util.mock_spec + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_api.py b/stdlib/test/test_importlib/import_/test_api.py new file mode 100644 index 00000000..d6ad590b --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_api.py @@ -0,0 +1,145 @@ +from test.test_importlib import util + +from importlib import machinery +import sys +import types +import unittest +import warnings + +PKG_NAME = 'fine' +SUBMOD_NAME = 'fine.bogus' + + +class BadSpecFinderLoader: + @classmethod + def find_spec(cls, fullname, path=None, target=None): + if fullname == SUBMOD_NAME: + spec = machinery.ModuleSpec(fullname, cls) + return spec + + @staticmethod + def create_module(spec): + return None + + @staticmethod + def exec_module(module): + if module.__name__ == SUBMOD_NAME: + raise ImportError('I cannot be loaded!') + + +class BadLoaderFinder: + @classmethod + def load_module(cls, fullname): + if fullname == SUBMOD_NAME: + raise ImportError('I cannot be loaded!') + + +class APITest: + + """Test API-specific details for __import__ (e.g. raising the right + exception when passing in an int for the module name).""" + + def test_raises_ModuleNotFoundError(self): + with self.assertRaises(ModuleNotFoundError): + util.import_importlib('some module that does not exist') + + def test_name_requires_rparition(self): + # Raise TypeError if a non-string is passed in for the module name. + with self.assertRaises(TypeError): + self.__import__(42) + + def test_negative_level(self): + # Raise ValueError when a negative level is specified. + # PEP 328 did away with sys.module None entries and the ambiguity of + # absolute/relative imports. + with self.assertRaises(ValueError): + self.__import__('os', globals(), level=-1) + + def test_nonexistent_fromlist_entry(self): + # If something in fromlist doesn't exist, that's okay. + # issue15715 + mod = types.ModuleType(PKG_NAME) + mod.__path__ = ['XXX'] + with util.import_state(meta_path=[self.bad_finder_loader]): + with util.uncache(PKG_NAME): + sys.modules[PKG_NAME] = mod + self.__import__(PKG_NAME, fromlist=['not here']) + + def test_fromlist_load_error_propagates(self): + # If something in fromlist triggers an exception not related to not + # existing, let that exception propagate. + # issue15316 + mod = types.ModuleType(PKG_NAME) + mod.__path__ = ['XXX'] + with util.import_state(meta_path=[self.bad_finder_loader]): + with util.uncache(PKG_NAME): + sys.modules[PKG_NAME] = mod + with self.assertRaises(ImportError): + self.__import__(PKG_NAME, + fromlist=[SUBMOD_NAME.rpartition('.')[-1]]) + + def test_blocked_fromlist(self): + # If fromlist entry is None, let a ModuleNotFoundError propagate. + # issue31642 + mod = types.ModuleType(PKG_NAME) + mod.__path__ = [] + with util.import_state(meta_path=[self.bad_finder_loader]): + with util.uncache(PKG_NAME, SUBMOD_NAME): + sys.modules[PKG_NAME] = mod + sys.modules[SUBMOD_NAME] = None + with self.assertRaises(ModuleNotFoundError) as cm: + self.__import__(PKG_NAME, + fromlist=[SUBMOD_NAME.rpartition('.')[-1]]) + self.assertEqual(cm.exception.name, SUBMOD_NAME) + + +class OldAPITests(APITest): + bad_finder_loader = BadLoaderFinder + + def test_raises_ModuleNotFoundError(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_raises_ModuleNotFoundError() + + def test_name_requires_rparition(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_name_requires_rparition() + + def test_negative_level(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_negative_level() + + def test_nonexistent_fromlist_entry(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_nonexistent_fromlist_entry() + + def test_fromlist_load_error_propagates(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_fromlist_load_error_propagates + + def test_blocked_fromlist(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_blocked_fromlist() + + +(Frozen_OldAPITests, + Source_OldAPITests + ) = util.test_both(OldAPITests, __import__=util.__import__) + + +class SpecAPITests(APITest): + bad_finder_loader = BadSpecFinderLoader + + +(Frozen_SpecAPITests, + Source_SpecAPITests + ) = util.test_both(SpecAPITests, __import__=util.__import__) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_caching.py b/stdlib/test/test_importlib/import_/test_caching.py new file mode 100644 index 00000000..718e7d04 --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_caching.py @@ -0,0 +1,97 @@ +"""Test that sys.modules is used properly by import.""" +from test.test_importlib import util +import sys +from types import MethodType +import unittest +import warnings + + +class UseCache: + + """When it comes to sys.modules, import prefers it over anything else. + + Once a name has been resolved, sys.modules is checked to see if it contains + the module desired. If so, then it is returned [use cache]. If it is not + found, then the proper steps are taken to perform the import, but + sys.modules is still used to return the imported module (e.g., not what a + loader returns) [from cache on return]. This also applies to imports of + things contained within a package and thus get assigned as an attribute + [from cache to attribute] or pulled in thanks to a fromlist import + [from cache for fromlist]. But if sys.modules contains None then + ImportError is raised [None in cache]. + + """ + + def test_using_cache(self): + # [use cache] + module_to_use = "some module found!" + with util.uncache('some_module'): + sys.modules['some_module'] = module_to_use + module = self.__import__('some_module') + self.assertEqual(id(module_to_use), id(module)) + + def test_None_in_cache(self): + #[None in cache] + name = 'using_None' + with util.uncache(name): + sys.modules[name] = None + with self.assertRaises(ImportError) as cm: + self.__import__(name) + self.assertEqual(cm.exception.name, name) + + +(Frozen_UseCache, + Source_UseCache + ) = util.test_both(UseCache, __import__=util.__import__) + + +class ImportlibUseCache(UseCache, unittest.TestCase): + + # Pertinent only to PEP 302; exec_module() doesn't return a module. + + __import__ = util.__import__['Source'] + + def create_mock(self, *names, return_=None): + mock = util.mock_spec(*names) + original_spec = mock.find_spec + def find_spec(self, fullname, path, target=None): + return original_spec(fullname) + mock.find_spec = MethodType(find_spec, mock) + return mock + + # __import__ inconsistent between loaders and built-in import when it comes + # to when to use the module in sys.modules and when not to. + def test_using_cache_after_loader(self): + # [from cache on return] + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + with self.create_mock('module') as mock: + with util.import_state(meta_path=[mock]): + module = self.__import__('module') + self.assertEqual(id(module), id(sys.modules['module'])) + + # See test_using_cache_after_loader() for reasoning. + def test_using_cache_for_assigning_to_attribute(self): + # [from cache to attribute] + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + with self.create_mock('pkg.__init__', 'pkg.module') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg.module') + self.assertHasAttr(module, 'module') + self.assertEqual(id(module.module), + id(sys.modules['pkg.module'])) + + # See test_using_cache_after_loader() for reasoning. + def test_using_cache_for_fromlist(self): + # [from cache for fromlist] + with self.create_mock('pkg.__init__', 'pkg.module') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg', fromlist=['module']) + self.assertHasAttr(module, 'module') + self.assertEqual(id(module.module), + id(sys.modules['pkg.module'])) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_fromlist.py b/stdlib/test/test_importlib/import_/test_fromlist.py new file mode 100644 index 00000000..feccc7be --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_fromlist.py @@ -0,0 +1,175 @@ +"""Test that the semantics relating to the 'fromlist' argument are correct.""" +from test.test_importlib import util +import warnings +import unittest + + +class ReturnValue: + + """The use of fromlist influences what import returns. + + If direct ``import ...`` statement is used, the root module or package is + returned [import return]. But if fromlist is set, then the specified module + is actually returned (whether it is a relative import or not) + [from return]. + + """ + + def test_return_from_import(self): + # [import return] + with util.mock_spec('pkg.__init__', 'pkg.module') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg.module') + self.assertEqual(module.__name__, 'pkg') + + def test_return_from_from_import(self): + # [from return] + with util.mock_spec('pkg.__init__', 'pkg.module')as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg.module', fromlist=['attr']) + self.assertEqual(module.__name__, 'pkg.module') + + +(Frozen_ReturnValue, + Source_ReturnValue + ) = util.test_both(ReturnValue, __import__=util.__import__) + + +class HandlingFromlist: + + """Using fromlist triggers different actions based on what is being asked + of it. + + If fromlist specifies an object on a module, nothing special happens + [object case]. This is even true if the object does not exist [bad object]. + + If a package is being imported, then what is listed in fromlist may be + treated as a module to be imported [module]. And this extends to what is + contained in __all__ when '*' is imported [using *]. And '*' does not need + to be the only name in the fromlist [using * with others]. + + """ + + def test_object(self): + # [object case] + with util.mock_spec('module') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('module', fromlist=['attr']) + self.assertEqual(module.__name__, 'module') + + def test_nonexistent_object(self): + # [bad object] + with util.mock_spec('module') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('module', fromlist=['non_existent']) + self.assertEqual(module.__name__, 'module') + self.assertNotHasAttr(module, 'non_existent') + + def test_module_from_package(self): + # [module] + with util.mock_spec('pkg.__init__', 'pkg.module') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg', fromlist=['module']) + self.assertEqual(module.__name__, 'pkg') + self.assertHasAttr(module, 'module') + self.assertEqual(module.module.__name__, 'pkg.module') + + def test_nonexistent_from_package(self): + with util.mock_spec('pkg.__init__') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg', fromlist=['non_existent']) + self.assertEqual(module.__name__, 'pkg') + self.assertNotHasAttr(module, 'non_existent') + + def test_module_from_package_triggers_ModuleNotFoundError(self): + # If a submodule causes an ModuleNotFoundError because it tries + # to import a module which doesn't exist, that should let the + # ModuleNotFoundError propagate. + def module_code(): + import i_do_not_exist + with util.mock_spec('pkg.__init__', 'pkg.mod', + module_code={'pkg.mod': module_code}) as importer: + with util.import_state(meta_path=[importer]): + with self.assertRaises(ModuleNotFoundError) as exc: + self.__import__('pkg', fromlist=['mod']) + self.assertEqual('i_do_not_exist', exc.exception.name) + + def test_empty_string(self): + with util.mock_spec('pkg.__init__', 'pkg.mod') as importer: + with util.import_state(meta_path=[importer]): + module = self.__import__('pkg.mod', fromlist=['']) + self.assertEqual(module.__name__, 'pkg.mod') + + def basic_star_test(self, fromlist=['*']): + # [using *] + with util.mock_spec('pkg.__init__', 'pkg.module') as mock: + with util.import_state(meta_path=[mock]): + mock['pkg'].__all__ = ['module'] + module = self.__import__('pkg', fromlist=fromlist) + self.assertEqual(module.__name__, 'pkg') + self.assertHasAttr(module, 'module') + self.assertEqual(module.module.__name__, 'pkg.module') + + def test_using_star(self): + # [using *] + self.basic_star_test() + + def test_fromlist_as_tuple(self): + self.basic_star_test(('*',)) + + def test_star_with_others(self): + # [using * with others] + context = util.mock_spec('pkg.__init__', 'pkg.module1', 'pkg.module2') + with context as mock: + with util.import_state(meta_path=[mock]): + mock['pkg'].__all__ = ['module1'] + module = self.__import__('pkg', fromlist=['module2', '*']) + self.assertEqual(module.__name__, 'pkg') + self.assertHasAttr(module, 'module1') + self.assertHasAttr(module, 'module2') + self.assertEqual(module.module1.__name__, 'pkg.module1') + self.assertEqual(module.module2.__name__, 'pkg.module2') + + def test_nonexistent_in_all(self): + with util.mock_spec('pkg.__init__') as importer: + with util.import_state(meta_path=[importer]): + importer['pkg'].__all__ = ['non_existent'] + module = self.__import__('pkg', fromlist=['*']) + self.assertEqual(module.__name__, 'pkg') + self.assertNotHasAttr(module, 'non_existent') + + def test_star_in_all(self): + with util.mock_spec('pkg.__init__') as importer: + with util.import_state(meta_path=[importer]): + importer['pkg'].__all__ = ['*'] + module = self.__import__('pkg', fromlist=['*']) + self.assertEqual(module.__name__, 'pkg') + self.assertNotHasAttr(module, '*') + + def test_invalid_type(self): + with util.mock_spec('pkg.__init__') as importer: + with util.import_state(meta_path=[importer]), \ + warnings.catch_warnings(): + warnings.simplefilter('error', BytesWarning) + with self.assertRaisesRegex(TypeError, r'\bfrom\b'): + self.__import__('pkg', fromlist=[b'attr']) + with self.assertRaisesRegex(TypeError, r'\bfrom\b'): + self.__import__('pkg', fromlist=iter([b'attr'])) + + def test_invalid_type_in_all(self): + with util.mock_spec('pkg.__init__') as importer: + with util.import_state(meta_path=[importer]), \ + warnings.catch_warnings(): + warnings.simplefilter('error', BytesWarning) + importer['pkg'].__all__ = [b'attr'] + with self.assertRaisesRegex(TypeError, r'\bpkg\.__all__\b'): + self.__import__('pkg', fromlist=['*']) + + +(Frozen_FromList, + Source_FromList + ) = util.test_both(HandlingFromlist, __import__=util.__import__) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_helpers.py b/stdlib/test/test_importlib/import_/test_helpers.py new file mode 100644 index 00000000..550f88d1 --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_helpers.py @@ -0,0 +1,184 @@ +"""Tests for helper functions used by import.c .""" + +from importlib import _bootstrap_external, machinery +import os.path +from types import ModuleType, SimpleNamespace +import unittest +import warnings + +from .. import util + + +class FixUpModuleTests: + + def test_no_loader_but_spec(self): + loader = object() + name = "hello" + path = "hello.py" + spec = machinery.ModuleSpec(name, loader) + ns = {"__spec__": spec} + _bootstrap_external._fix_up_module(ns, name, path) + + expected = {"__spec__": spec, "__loader__": loader, "__file__": path, + "__cached__": None} + self.assertEqual(ns, expected) + + def test_no_loader_no_spec_but_sourceless(self): + name = "hello" + path = "hello.py" + ns = {} + _bootstrap_external._fix_up_module(ns, name, path, path) + + expected = {"__file__": path, "__cached__": path} + + for key, val in expected.items(): + with self.subTest(f"{key}: {val}"): + self.assertEqual(ns[key], val) + + spec = ns["__spec__"] + self.assertIsInstance(spec, machinery.ModuleSpec) + self.assertEqual(spec.name, name) + self.assertEqual(spec.origin, os.path.abspath(path)) + self.assertEqual(spec.cached, os.path.abspath(path)) + self.assertIsInstance(spec.loader, machinery.SourcelessFileLoader) + self.assertEqual(spec.loader.name, name) + self.assertEqual(spec.loader.path, path) + self.assertEqual(spec.loader, ns["__loader__"]) + + def test_no_loader_no_spec_but_source(self): + name = "hello" + path = "hello.py" + ns = {} + _bootstrap_external._fix_up_module(ns, name, path) + + expected = {"__file__": path, "__cached__": None} + + for key, val in expected.items(): + with self.subTest(f"{key}: {val}"): + self.assertEqual(ns[key], val) + + spec = ns["__spec__"] + self.assertIsInstance(spec, machinery.ModuleSpec) + self.assertEqual(spec.name, name) + self.assertEqual(spec.origin, os.path.abspath(path)) + self.assertIsInstance(spec.loader, machinery.SourceFileLoader) + self.assertEqual(spec.loader.name, name) + self.assertEqual(spec.loader.path, path) + self.assertEqual(spec.loader, ns["__loader__"]) + + +FrozenFixUpModuleTests, SourceFixUpModuleTests = util.test_both(FixUpModuleTests) + + +class TestBlessMyLoader(unittest.TestCase): + # GH#86298 is part of the migration away from module attributes and toward + # __spec__ attributes. There are several cases to test here. This will + # have to change in Python 3.14 when we actually remove/ignore __loader__ + # in favor of requiring __spec__.loader. + + def test_gh86298_no_loader_and_no_spec(self): + bar = ModuleType('bar') + del bar.__loader__ + del bar.__spec__ + # 2022-10-06(warsaw): For backward compatibility with the + # implementation in _warnings.c, this can't raise an + # AttributeError. See _bless_my_loader() in _bootstrap_external.py + # If working with a module: + ## self.assertRaises( + ## AttributeError, _bootstrap_external._bless_my_loader, + ## bar.__dict__) + self.assertIsNone(_bootstrap_external._bless_my_loader(bar.__dict__)) + + def test_gh86298_loader_is_none_and_no_spec(self): + bar = ModuleType('bar') + bar.__loader__ = None + del bar.__spec__ + # 2022-10-06(warsaw): For backward compatibility with the + # implementation in _warnings.c, this can't raise an + # AttributeError. See _bless_my_loader() in _bootstrap_external.py + # If working with a module: + ## self.assertRaises( + ## AttributeError, _bootstrap_external._bless_my_loader, + ## bar.__dict__) + self.assertIsNone(_bootstrap_external._bless_my_loader(bar.__dict__)) + + def test_gh86298_no_loader_and_spec_is_none(self): + bar = ModuleType('bar') + del bar.__loader__ + bar.__spec__ = None + self.assertRaises( + ValueError, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_loader_is_none_and_spec_is_none(self): + bar = ModuleType('bar') + bar.__loader__ = None + bar.__spec__ = None + self.assertRaises( + ValueError, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_loader_is_none_and_spec_loader_is_none(self): + bar = ModuleType('bar') + bar.__loader__ = None + bar.__spec__ = SimpleNamespace(loader=None) + self.assertRaises( + ValueError, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_no_spec(self): + bar = ModuleType('bar') + bar.__loader__ = object() + del bar.__spec__ + with warnings.catch_warnings(): + self.assertWarns( + DeprecationWarning, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_spec_is_none(self): + bar = ModuleType('bar') + bar.__loader__ = object() + bar.__spec__ = None + with warnings.catch_warnings(): + self.assertWarns( + DeprecationWarning, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_no_spec_loader(self): + bar = ModuleType('bar') + bar.__loader__ = object() + bar.__spec__ = SimpleNamespace() + with warnings.catch_warnings(): + self.assertWarns( + DeprecationWarning, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_loader_and_spec_loader_disagree(self): + bar = ModuleType('bar') + bar.__loader__ = object() + bar.__spec__ = SimpleNamespace(loader=object()) + with warnings.catch_warnings(): + self.assertWarns( + DeprecationWarning, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_no_loader_and_no_spec_loader(self): + bar = ModuleType('bar') + del bar.__loader__ + bar.__spec__ = SimpleNamespace() + self.assertRaises( + AttributeError, + _bootstrap_external._bless_my_loader, bar.__dict__) + + def test_gh86298_no_loader_with_spec_loader_okay(self): + bar = ModuleType('bar') + del bar.__loader__ + loader = object() + bar.__spec__ = SimpleNamespace(loader=loader) + self.assertEqual( + _bootstrap_external._bless_my_loader(bar.__dict__), + loader) + + +if __name__ == "__main__": + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_meta_path.py b/stdlib/test/test_importlib/import_/test_meta_path.py new file mode 100644 index 00000000..4c00f606 --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_meta_path.py @@ -0,0 +1,127 @@ +from test.test_importlib import util +import importlib._bootstrap +import sys +from types import MethodType +import unittest +import warnings + + +class CallingOrder: + + """Calls to the importers on sys.meta_path happen in order that they are + specified in the sequence, starting with the first importer + [first called], and then continuing on down until one is found that doesn't + return None [continuing].""" + + + def test_first_called(self): + # [first called] + mod = 'top_level' + with util.mock_spec(mod) as first, util.mock_spec(mod) as second: + with util.import_state(meta_path=[first, second]): + self.assertIs(self.__import__(mod), first.modules[mod]) + + def test_continuing(self): + # [continuing] + mod_name = 'for_real' + with util.mock_spec('nonexistent') as first, \ + util.mock_spec(mod_name) as second: + first.find_spec = lambda self, fullname, path=None, parent=None: None + with util.import_state(meta_path=[first, second]): + self.assertIs(self.__import__(mod_name), second.modules[mod_name]) + + def test_empty(self): + # Raise an ImportWarning if sys.meta_path is empty. + module_name = 'nothing' + try: + del sys.modules[module_name] + except KeyError: + pass + with util.import_state(meta_path=[]): + with warnings.catch_warnings(record=True) as w: + warnings.simplefilter('always') + self.assertIsNone(importlib._bootstrap._find_spec('nothing', + None)) + self.assertEqual(len(w), 1) + self.assertIsSubclass(w[-1].category, ImportWarning) + + +(Frozen_CallingOrder, + Source_CallingOrder + ) = util.test_both(CallingOrder, __import__=util.__import__) + + +class CallSignature: + + """If there is no __path__ entry on the parent module, then 'path' is None + [no path]. Otherwise, the value for __path__ is passed in for the 'path' + argument [path set].""" + + def log_finder(self, importer): + fxn = getattr(importer, self.finder_name) + log = [] + def wrapper(self, *args, **kwargs): + log.append([args, kwargs]) + return fxn(*args, **kwargs) + return log, wrapper + + def test_no_path(self): + # [no path] + mod_name = 'top_level' + assert '.' not in mod_name + with self.mock_modules(mod_name) as importer: + log, wrapped_call = self.log_finder(importer) + setattr(importer, self.finder_name, MethodType(wrapped_call, importer)) + with util.import_state(meta_path=[importer]): + self.__import__(mod_name) + assert len(log) == 1 + args = log[0][0] + # Assuming all arguments are positional. + self.assertEqual(args[0], mod_name) + self.assertIsNone(args[1]) + + def test_with_path(self): + # [path set] + pkg_name = 'pkg' + mod_name = pkg_name + '.module' + path = [42] + assert '.' in mod_name + with self.mock_modules(pkg_name+'.__init__', mod_name) as importer: + importer.modules[pkg_name].__path__ = path + log, wrapped_call = self.log_finder(importer) + setattr(importer, self.finder_name, MethodType(wrapped_call, importer)) + with util.import_state(meta_path=[importer]): + self.__import__(mod_name) + assert len(log) == 2 + args = log[1][0] + kwargs = log[1][1] + # Assuming all arguments are positional. + self.assertFalse(kwargs) + self.assertEqual(args[0], mod_name) + self.assertIs(args[1], path) + +class CallSignoreSuppressImportWarning(CallSignature): + + def test_no_path(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_no_path() + + def test_with_path(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + super().test_no_path() + + +class CallSignaturePEP451(CallSignature): + mock_modules = util.mock_spec + finder_name = 'find_spec' + + +(Frozen_CallSignaturePEP451, + Source_CallSignaturePEP451 + ) = util.test_both(CallSignaturePEP451, __import__=util.__import__) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_packages.py b/stdlib/test/test_importlib/import_/test_packages.py new file mode 100644 index 00000000..0c29d608 --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_packages.py @@ -0,0 +1,110 @@ +from test.test_importlib import util +import sys +import unittest +from test.support import import_helper + + +class ParentModuleTests: + + """Importing a submodule should import the parent modules.""" + + def test_import_parent(self): + with util.mock_spec('pkg.__init__', 'pkg.module') as mock: + with util.import_state(meta_path=[mock]): + module = self.__import__('pkg.module') + self.assertIn('pkg', sys.modules) + + def test_bad_parent(self): + with util.mock_spec('pkg.module') as mock: + with util.import_state(meta_path=[mock]): + with self.assertRaises(ImportError) as cm: + self.__import__('pkg.module') + self.assertEqual(cm.exception.name, 'pkg') + + def test_raising_parent_after_importing_child(self): + def __init__(): + import pkg.module + 1/0 + mock = util.mock_spec('pkg.__init__', 'pkg.module', + module_code={'pkg': __init__}) + with mock: + with util.import_state(meta_path=[mock]): + with self.assertRaises(ZeroDivisionError): + self.__import__('pkg') + self.assertNotIn('pkg', sys.modules) + self.assertIn('pkg.module', sys.modules) + with self.assertRaises(ZeroDivisionError): + self.__import__('pkg.module') + self.assertNotIn('pkg', sys.modules) + self.assertIn('pkg.module', sys.modules) + + def test_raising_parent_after_relative_importing_child(self): + def __init__(): + from . import module + 1/0 + mock = util.mock_spec('pkg.__init__', 'pkg.module', + module_code={'pkg': __init__}) + with mock: + with util.import_state(meta_path=[mock]): + with self.assertRaises((ZeroDivisionError, ImportError)): + # This raises ImportError on the "from . import module" + # line, not sure why. + self.__import__('pkg') + self.assertNotIn('pkg', sys.modules) + with self.assertRaises((ZeroDivisionError, ImportError)): + self.__import__('pkg.module') + self.assertNotIn('pkg', sys.modules) + # XXX False + #self.assertIn('pkg.module', sys.modules) + + def test_raising_parent_after_double_relative_importing_child(self): + def __init__(): + from ..subpkg import module + 1/0 + mock = util.mock_spec('pkg.__init__', 'pkg.subpkg.__init__', + 'pkg.subpkg.module', + module_code={'pkg.subpkg': __init__}) + with mock: + with util.import_state(meta_path=[mock]): + with self.assertRaises((ZeroDivisionError, ImportError)): + # This raises ImportError on the "from ..subpkg import module" + # line, not sure why. + self.__import__('pkg.subpkg') + self.assertNotIn('pkg.subpkg', sys.modules) + with self.assertRaises((ZeroDivisionError, ImportError)): + self.__import__('pkg.subpkg.module') + self.assertNotIn('pkg.subpkg', sys.modules) + # XXX False + #self.assertIn('pkg.subpkg.module', sys.modules) + + def test_module_not_package(self): + # Try to import a submodule from a non-package should raise ImportError. + assert not hasattr(sys, '__path__') + with self.assertRaises(ImportError) as cm: + self.__import__('sys.no_submodules_here') + self.assertEqual(cm.exception.name, 'sys.no_submodules_here') + + def test_module_not_package_but_side_effects(self): + # If a module injects something into sys.modules as a side-effect, then + # pick up on that fact. + name = 'mod' + subname = name + '.b' + def module_injection(): + sys.modules[subname] = 'total bunk' + mock_spec = util.mock_spec('mod', + module_code={'mod': module_injection}) + with mock_spec as mock: + with util.import_state(meta_path=[mock]): + try: + submodule = self.__import__(subname) + finally: + import_helper.unload(subname) + + +(Frozen_ParentTests, + Source_ParentTests + ) = util.test_both(ParentModuleTests, __import__=util.__import__) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_path.py b/stdlib/test/test_importlib/import_/test_path.py new file mode 100644 index 00000000..79e0bdca --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_path.py @@ -0,0 +1,269 @@ +from test.support import os_helper +from test.test_importlib import util + +importlib = util.import_importlib('importlib') +machinery = util.import_importlib('importlib.machinery') + +import os +import sys +import tempfile +from types import ModuleType +import unittest +import warnings +import zipimport + + +class FinderTests: + + """Tests for PathFinder.""" + + find = None + check_found = None + + def test_failure(self): + # Test None returned upon not finding a suitable loader. + module = '' + with util.import_state(): + self.assertIsNone(self.find(module)) + + def test_sys_path(self): + # Test that sys.path is used when 'path' is None. + # Implicitly tests that sys.path_importer_cache is used. + module = '' + path = '' + importer = util.mock_spec(module) + with util.import_state(path_importer_cache={path: importer}, + path=[path]): + found = self.find(module) + self.check_found(found, importer) + + def test_path(self): + # Test that 'path' is used when set. + # Implicitly tests that sys.path_importer_cache is used. + module = '' + path = '' + importer = util.mock_spec(module) + with util.import_state(path_importer_cache={path: importer}): + found = self.find(module, [path]) + self.check_found(found, importer) + + def test_empty_list(self): + # An empty list should not count as asking for sys.path. + module = 'module' + path = '' + importer = util.mock_spec(module) + with util.import_state(path_importer_cache={path: importer}, + path=[path]): + self.assertIsNone(self.find('module', [])) + + def test_path_hooks(self): + # Test that sys.path_hooks is used. + # Test that sys.path_importer_cache is set. + module = '' + path = '' + importer = util.mock_spec(module) + hook = util.mock_path_hook(path, importer=importer) + with util.import_state(path_hooks=[hook]): + found = self.find(module, [path]) + self.check_found(found, importer) + self.assertIn(path, sys.path_importer_cache) + self.assertIs(sys.path_importer_cache[path], importer) + + def test_empty_path_hooks(self): + # Test that if sys.path_hooks is empty a warning is raised, + # sys.path_importer_cache gets None set, and PathFinder returns None. + path_entry = 'bogus_path' + with util.import_state(path_importer_cache={}, path_hooks=[], + path=[path_entry]): + with warnings.catch_warnings(record=True) as w: + warnings.simplefilter('always', ImportWarning) + warnings.simplefilter('ignore', DeprecationWarning) + self.assertIsNone(self.find('os')) + self.assertIsNone(sys.path_importer_cache[path_entry]) + self.assertEqual(len(w), 1) + self.assertIsSubclass(w[-1].category, ImportWarning) + + def test_path_importer_cache_empty_string(self): + # The empty string should create a finder using the cwd. + path = '' + module = '' + importer = util.mock_spec(module) + hook = util.mock_path_hook(os.getcwd(), importer=importer) + with util.import_state(path=[path], path_hooks=[hook]): + found = self.find(module) + self.check_found(found, importer) + self.assertIn(os.getcwd(), sys.path_importer_cache) + + def test_None_on_sys_path(self): + # Putting None in sys.path[0] caused an import regression from Python + # 3.2: http://bugs.python.org/issue16514 + new_path = sys.path[:] + new_path.insert(0, None) + new_path_importer_cache = sys.path_importer_cache.copy() + new_path_importer_cache.pop(None, None) + new_path_hooks = [zipimport.zipimporter, + self.machinery.FileFinder.path_hook( + *self.importlib._bootstrap_external._get_supported_file_loaders())] + missing = object() + email = sys.modules.pop('email', missing) + try: + with util.import_state(meta_path=sys.meta_path[:], + path=new_path, + path_importer_cache=new_path_importer_cache, + path_hooks=new_path_hooks): + module = self.importlib.import_module('email') + self.assertIsInstance(module, ModuleType) + finally: + if email is not missing: + sys.modules['email'] = email + + def test_finder_with_find_spec(self): + class TestFinder: + spec = None + def find_spec(self, fullname, target=None): + return self.spec + path = 'testing path' + with util.import_state(path_importer_cache={path: TestFinder()}): + self.assertIsNone( + self.machinery.PathFinder.find_spec('whatever', [path])) + success_finder = TestFinder() + success_finder.spec = self.machinery.ModuleSpec('whatever', __loader__) + with util.import_state(path_importer_cache={path: success_finder}): + got = self.machinery.PathFinder.find_spec('whatever', [path]) + self.assertEqual(got, success_finder.spec) + + def test_deleted_cwd(self): + # Issue #22834 + old_dir = os.getcwd() + self.addCleanup(os.chdir, old_dir) + new_dir = tempfile.mkdtemp() + try: + os.chdir(new_dir) + try: + os.rmdir(new_dir) + except OSError: + # EINVAL on Solaris, EBUSY on AIX, ENOTEMPTY on Windows + self.skipTest("platform does not allow " + "the deletion of the cwd") + except: + os.chdir(old_dir) + os.rmdir(new_dir) + raise + + with util.import_state(path=['']): + # Do not want FileNotFoundError raised. + self.assertIsNone(self.machinery.PathFinder.find_spec('whatever')) + + @os_helper.skip_unless_working_chmod + def test_permission_error_cwd(self): + # gh-115911: Test that an unreadable CWD does not break imports, in + # particular during early stages of interpreter startup. + + def noop_hook(*args): + raise ImportError + + with ( + os_helper.temp_dir() as new_dir, + os_helper.save_mode(new_dir), + os_helper.change_cwd(new_dir), + util.import_state(path=[''], path_hooks=[noop_hook]), + ): + # chmod() is done here (inside the 'with' block) because the order + # of teardown operations cannot be the reverse of setup order. See + # https://github.com/python/cpython/pull/116131#discussion_r1739649390 + try: + os.chmod(new_dir, 0o000) + except OSError: + self.skipTest("platform does not allow " + "changing mode of the cwd") + + # Do not want PermissionError raised. + self.assertIsNone(self.machinery.PathFinder.find_spec('whatever')) + + def test_invalidate_caches_finders(self): + # Finders with an invalidate_caches() method have it called. + class FakeFinder: + def __init__(self): + self.called = False + + def invalidate_caches(self): + self.called = True + + key = os.path.abspath('finder_to_invalidate') + cache = {'leave_alone': object(), key: FakeFinder()} + with util.import_state(path_importer_cache=cache): + self.machinery.PathFinder.invalidate_caches() + self.assertTrue(cache[key].called) + + def test_invalidate_caches_clear_out_None(self): + # Clear out None in sys.path_importer_cache() when invalidating caches. + cache = {'clear_out': None} + with util.import_state(path_importer_cache=cache): + self.machinery.PathFinder.invalidate_caches() + self.assertEqual(len(cache), 0) + + def test_invalidate_caches_clear_out_relative_path(self): + class FakeFinder: + def invalidate_caches(self): + pass + + cache = {'relative_path': FakeFinder()} + with util.import_state(path_importer_cache=cache): + self.machinery.PathFinder.invalidate_caches() + self.assertEqual(cache, {}) + + +class FindModuleTests(FinderTests): + def find(self, *args, **kwargs): + spec = self.machinery.PathFinder.find_spec(*args, **kwargs) + return None if spec is None else spec.loader + + def check_found(self, found, importer): + self.assertIs(found, importer) + + +(Frozen_FindModuleTests, + Source_FindModuleTests +) = util.test_both(FindModuleTests, importlib=importlib, machinery=machinery) + + +class FindSpecTests(FinderTests): + def find(self, *args, **kwargs): + return self.machinery.PathFinder.find_spec(*args, **kwargs) + def check_found(self, found, importer): + self.assertIs(found.loader, importer) + + +(Frozen_FindSpecTests, + Source_FindSpecTests + ) = util.test_both(FindSpecTests, importlib=importlib, machinery=machinery) + + +class PathEntryFinderTests: + + def test_finder_with_failing_find_spec(self): + class Finder: + path_location = 'test_finder_with_find_spec' + def __init__(self, path): + if path != self.path_location: + raise ImportError + + @staticmethod + def find_spec(fullname, target=None): + return None + + + with util.import_state(path=[Finder.path_location]+sys.path[:], + path_hooks=[Finder]): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + self.machinery.PathFinder.find_spec('importlib') + + +(Frozen_PEFTests, + Source_PEFTests + ) = util.test_both(PathEntryFinderTests, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/import_/test_relative_imports.py b/stdlib/test/test_importlib/import_/test_relative_imports.py new file mode 100644 index 00000000..1549cbe9 --- /dev/null +++ b/stdlib/test/test_importlib/import_/test_relative_imports.py @@ -0,0 +1,248 @@ +"""Test relative imports (PEP 328).""" +from test.test_importlib import util +import unittest +import warnings + + +class RelativeImports: + + """PEP 328 introduced relative imports. This allows for imports to occur + from within a package without having to specify the actual package name. + + A simple example is to import another module within the same package + [module from module]:: + + # From pkg.mod1 with pkg.mod2 being a module. + from . import mod2 + + This also works for getting an attribute from a module that is specified + in a relative fashion [attr from module]:: + + # From pkg.mod1. + from .mod2 import attr + + But this is in no way restricted to working between modules; it works + from [package to module],:: + + # From pkg, importing pkg.module which is a module. + from . import module + + [module to package],:: + + # Pull attr from pkg, called from pkg.module which is a module. + from . import attr + + and [package to package]:: + + # From pkg.subpkg1 (both pkg.subpkg[1,2] are packages). + from .. import subpkg2 + + The number of dots used is in no way restricted [deep import]:: + + # Import pkg.attr from pkg.pkg1.pkg2.pkg3.pkg4.pkg5. + from ...... import attr + + To prevent someone from accessing code that is outside of a package, one + cannot reach the location containing the root package itself:: + + # From pkg.__init__ [too high from package] + from .. import top_level + + # From pkg.module [too high from module] + from .. import top_level + + Relative imports are the only type of import that allow for an empty + module name for an import [empty name]. + + """ + + def relative_import_test(self, create, globals_, callback): + """Abstract out boilerplace for setting up for an import test.""" + uncache_names = [] + for name in create: + if not name.endswith('.__init__'): + uncache_names.append(name) + else: + uncache_names.append(name[:-len('.__init__')]) + with util.mock_spec(*create) as importer: + with util.import_state(meta_path=[importer]): + with warnings.catch_warnings(): + warnings.simplefilter("ignore") + for global_ in globals_: + with util.uncache(*uncache_names): + callback(global_) + + + def test_module_from_module(self): + # [module from module] + create = 'pkg.__init__', 'pkg.mod2' + globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.mod1'} + def callback(global_): + self.__import__('pkg') # For __import__(). + module = self.__import__('', global_, fromlist=['mod2'], level=1) + self.assertEqual(module.__name__, 'pkg') + self.assertHasAttr(module, 'mod2') + self.assertEqual(module.mod2.attr, 'pkg.mod2') + self.relative_import_test(create, globals_, callback) + + def test_attr_from_module(self): + # [attr from module] + create = 'pkg.__init__', 'pkg.mod2' + globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.mod1'} + def callback(global_): + self.__import__('pkg') # For __import__(). + module = self.__import__('mod2', global_, fromlist=['attr'], + level=1) + self.assertEqual(module.__name__, 'pkg.mod2') + self.assertEqual(module.attr, 'pkg.mod2') + self.relative_import_test(create, globals_, callback) + + def test_package_to_module(self): + # [package to module] + create = 'pkg.__init__', 'pkg.module' + globals_ = ({'__package__': 'pkg'}, + {'__name__': 'pkg', '__path__': ['blah']}) + def callback(global_): + self.__import__('pkg') # For __import__(). + module = self.__import__('', global_, fromlist=['module'], + level=1) + self.assertEqual(module.__name__, 'pkg') + self.assertHasAttr(module, 'module') + self.assertEqual(module.module.attr, 'pkg.module') + self.relative_import_test(create, globals_, callback) + + def test_module_to_package(self): + # [module to package] + create = 'pkg.__init__', 'pkg.module' + globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.module'} + def callback(global_): + self.__import__('pkg') # For __import__(). + module = self.__import__('', global_, fromlist=['attr'], level=1) + self.assertEqual(module.__name__, 'pkg') + self.relative_import_test(create, globals_, callback) + + def test_package_to_package(self): + # [package to package] + create = ('pkg.__init__', 'pkg.subpkg1.__init__', + 'pkg.subpkg2.__init__') + globals_ = ({'__package__': 'pkg.subpkg1'}, + {'__name__': 'pkg.subpkg1', '__path__': ['blah']}) + def callback(global_): + module = self.__import__('', global_, fromlist=['subpkg2'], + level=2) + self.assertEqual(module.__name__, 'pkg') + self.assertHasAttr(module, 'subpkg2') + self.assertEqual(module.subpkg2.attr, 'pkg.subpkg2.__init__') + self.relative_import_test(create, globals_, callback) + + def test_deep_import(self): + # [deep import] + create = ['pkg.__init__'] + for count in range(1,6): + create.append('{0}.pkg{1}.__init__'.format( + create[-1][:-len('.__init__')], count)) + globals_ = ({'__package__': 'pkg.pkg1.pkg2.pkg3.pkg4.pkg5'}, + {'__name__': 'pkg.pkg1.pkg2.pkg3.pkg4.pkg5', + '__path__': ['blah']}) + def callback(global_): + self.__import__(globals_[0]['__package__']) + module = self.__import__('', global_, fromlist=['attr'], level=6) + self.assertEqual(module.__name__, 'pkg') + self.relative_import_test(create, globals_, callback) + + def test_too_high_from_package(self): + # [too high from package] + create = ['top_level', 'pkg.__init__'] + globals_ = ({'__package__': 'pkg'}, + {'__name__': 'pkg', '__path__': ['blah']}) + def callback(global_): + self.__import__('pkg') + with self.assertRaises(ImportError): + self.__import__('', global_, fromlist=['top_level'], + level=2) + self.relative_import_test(create, globals_, callback) + + def test_too_high_from_module(self): + # [too high from module] + create = ['top_level', 'pkg.__init__', 'pkg.module'] + globals_ = {'__package__': 'pkg'}, {'__name__': 'pkg.module'} + def callback(global_): + self.__import__('pkg') + with self.assertRaises(ImportError): + self.__import__('', global_, fromlist=['top_level'], + level=2) + self.relative_import_test(create, globals_, callback) + + def test_empty_name_w_level_0(self): + # [empty name] + with self.assertRaises(ValueError): + self.__import__('') + + def test_import_from_different_package(self): + # Test importing from a different package than the caller. + # in pkg.subpkg1.mod + # from ..subpkg2 import mod + create = ['__runpy_pkg__.__init__', + '__runpy_pkg__.__runpy_pkg__.__init__', + '__runpy_pkg__.uncle.__init__', + '__runpy_pkg__.uncle.cousin.__init__', + '__runpy_pkg__.uncle.cousin.nephew'] + globals_ = {'__package__': '__runpy_pkg__.__runpy_pkg__'} + def callback(global_): + self.__import__('__runpy_pkg__.__runpy_pkg__') + module = self.__import__('uncle.cousin', globals_, {}, + fromlist=['nephew'], + level=2) + self.assertEqual(module.__name__, '__runpy_pkg__.uncle.cousin') + self.relative_import_test(create, globals_, callback) + + def test_import_relative_import_no_fromlist(self): + # Import a relative module w/ no fromlist. + create = ['crash.__init__', 'crash.mod'] + globals_ = [{'__package__': 'crash', '__name__': 'crash'}] + def callback(global_): + self.__import__('crash') + mod = self.__import__('mod', global_, {}, [], 1) + self.assertEqual(mod.__name__, 'crash.mod') + self.relative_import_test(create, globals_, callback) + + def test_relative_import_no_globals(self): + # No globals for a relative import is an error. + with warnings.catch_warnings(): + warnings.simplefilter("ignore") + with self.assertRaises(KeyError): + self.__import__('sys', level=1) + + def test_relative_import_no_package(self): + with self.assertRaises(ImportError): + self.__import__('a', {'__package__': '', '__spec__': None}, + level=1) + + def test_relative_import_no_package_exists_absolute(self): + with self.assertRaises(ImportError): + self.__import__('sys', {'__package__': '', '__spec__': None}, + level=1) + + def test_malicious_relative_import(self): + # https://github.com/python/cpython/issues/134100 + # Test to make sure UAF bug with error msg doesn't come back to life + import sys + loooong = "".ljust(0x23000, "b") + name = f"a.{loooong}.c" + + with util.uncache(name): + sys.modules[name] = {} + with self.assertRaisesRegex( + KeyError, + r"'a\.b+' not in sys\.modules as expected" + ): + __import__(f"{loooong}.c", {"__package__": "a"}, level=1) + + +(Frozen_RelativeImports, + Source_RelativeImports + ) = util.test_both(RelativeImports, __import__=util.__import__) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/metadata/__init__.py b/stdlib/test/test_importlib/metadata/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/test/test_importlib/metadata/_context.py b/stdlib/test/test_importlib/metadata/_context.py new file mode 100644 index 00000000..8a53eb55 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/_context.py @@ -0,0 +1,13 @@ +import contextlib + + +# from jaraco.context 4.3 +class suppress(contextlib.suppress, contextlib.ContextDecorator): + """ + A version of contextlib.suppress with decorator support. + + >>> @suppress(KeyError) + ... def key_error(): + ... {}[''] + >>> key_error() + """ diff --git a/stdlib/test/test_importlib/metadata/_path.py b/stdlib/test/test_importlib/metadata/_path.py new file mode 100644 index 00000000..b3cfb9cd --- /dev/null +++ b/stdlib/test/test_importlib/metadata/_path.py @@ -0,0 +1,115 @@ +# from jaraco.path 3.7 + +import functools +import pathlib +from typing import Dict, Protocol, Union +from typing import runtime_checkable + + +class Symlink(str): + """ + A string indicating the target of a symlink. + """ + + +FilesSpec = Dict[str, Union[str, bytes, Symlink, 'FilesSpec']] # type: ignore + + +@runtime_checkable +class TreeMaker(Protocol): + def __truediv__(self, *args, **kwargs): ... # pragma: no cover + + def mkdir(self, **kwargs): ... # pragma: no cover + + def write_text(self, content, **kwargs): ... # pragma: no cover + + def write_bytes(self, content): ... # pragma: no cover + + def symlink_to(self, target): ... # pragma: no cover + + +def _ensure_tree_maker(obj: Union[str, TreeMaker]) -> TreeMaker: + return obj if isinstance(obj, TreeMaker) else pathlib.Path(obj) # type: ignore + + +def build( + spec: FilesSpec, + prefix: Union[str, TreeMaker] = pathlib.Path(), # type: ignore +): + """ + Build a set of files/directories, as described by the spec. + + Each key represents a pathname, and the value represents + the content. Content may be a nested directory. + + >>> spec = { + ... 'README.txt': "A README file", + ... "foo": { + ... "__init__.py": "", + ... "bar": { + ... "__init__.py": "", + ... }, + ... "baz.py": "# Some code", + ... "bar.py": Symlink("baz.py"), + ... }, + ... "bing": Symlink("foo"), + ... } + >>> target = getfixture('tmp_path') + >>> build(spec, target) + >>> target.joinpath('foo/baz.py').read_text(encoding='utf-8') + '# Some code' + >>> target.joinpath('bing/bar.py').read_text(encoding='utf-8') + '# Some code' + """ + for name, contents in spec.items(): + create(contents, _ensure_tree_maker(prefix) / name) + + +@functools.singledispatch +def create(content: Union[str, bytes, FilesSpec], path): + path.mkdir(exist_ok=True) + build(content, prefix=path) # type: ignore + + +@create.register +def _(content: bytes, path): + path.write_bytes(content) + + +@create.register +def _(content: str, path): + path.write_text(content, encoding='utf-8') + + +@create.register +def _(content: Symlink, path): + path.symlink_to(content) + + +class Recording: + """ + A TreeMaker object that records everything that would be written. + + >>> r = Recording() + >>> build({'foo': {'foo1.txt': 'yes'}, 'bar.txt': 'abc'}, r) + >>> r.record + ['foo/foo1.txt', 'bar.txt'] 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00000000..479488a0 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/data/sources/example/setup.py @@ -0,0 +1,11 @@ +from setuptools import setup + +setup( + name='example', + version='21.12', + license='Apache Software License', + packages=['example'], + entry_points={ + 'console_scripts': ['example = example:main', 'Example=example:main'], + }, +) diff --git a/stdlib/test/test_importlib/metadata/data/sources/example2/example2/__init__.py b/stdlib/test/test_importlib/metadata/data/sources/example2/example2/__init__.py new file mode 100644 index 00000000..de645c2e --- /dev/null +++ b/stdlib/test/test_importlib/metadata/data/sources/example2/example2/__init__.py @@ -0,0 +1,2 @@ +def main(): + return "example" diff --git a/stdlib/test/test_importlib/metadata/data/sources/example2/pyproject.toml b/stdlib/test/test_importlib/metadata/data/sources/example2/pyproject.toml new file mode 100644 index 00000000..011f4751 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/data/sources/example2/pyproject.toml @@ -0,0 +1,10 @@ +[build-system] +build-backend = 'trampolim' +requires = ['trampolim'] + +[project] +name = 'example2' +version = '1.0.0' + +[project.scripts] +example = 'example2:main' diff --git a/stdlib/test/test_importlib/metadata/fixtures.py b/stdlib/test/test_importlib/metadata/fixtures.py new file mode 100644 index 00000000..826b1b32 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/fixtures.py @@ -0,0 +1,395 @@ +import sys +import copy +import json +import shutil +import pathlib +import textwrap +import functools +import contextlib + +from test.support import import_helper +from test.support import os_helper +from test.support import requires_zlib + +from . import _path +from ._path import FilesSpec + + +try: + from importlib import resources # type: ignore + + getattr(resources, 'files') + getattr(resources, 'as_file') +except (ImportError, AttributeError): + import importlib_resources as resources # type: ignore + + +@contextlib.contextmanager +def tmp_path(): + """ + Like os_helper.temp_dir, but yields a pathlib.Path. + """ + with os_helper.temp_dir() as path: + yield pathlib.Path(path) + + +@contextlib.contextmanager +def install_finder(finder): + sys.meta_path.append(finder) + try: + yield + finally: + sys.meta_path.remove(finder) + + +class Fixtures: + def setUp(self): + self.fixtures = contextlib.ExitStack() + self.addCleanup(self.fixtures.close) + + +class SiteDir(Fixtures): + def setUp(self): + super().setUp() + self.site_dir = self.fixtures.enter_context(tmp_path()) + + +class OnSysPath(Fixtures): + @staticmethod + @contextlib.contextmanager + def add_sys_path(dir): + sys.path[:0] = [str(dir)] + try: + yield + finally: + sys.path.remove(str(dir)) + + def setUp(self): + super().setUp() + self.fixtures.enter_context(self.add_sys_path(self.site_dir)) + self.fixtures.enter_context(import_helper.isolated_modules()) + + +class SiteBuilder(SiteDir): + def setUp(self): + super().setUp() + for cls in self.__class__.mro(): + with contextlib.suppress(AttributeError): + build_files(cls.files, prefix=self.site_dir) + + +class DistInfoPkg(OnSysPath, SiteBuilder): + files: FilesSpec = { + "distinfo_pkg-1.0.0.dist-info": { + "METADATA": """ + Name: distinfo-pkg + Author: Steven Ma + Version: 1.0.0 + Requires-Dist: wheel >= 1.0 + Requires-Dist: pytest; extra == 'test' + Keywords: sample package + + Once upon a time + There was a distinfo pkg + """, + "RECORD": "mod.py,sha256=abc,20\n", + "entry_points.txt": """ + [entries] + main = mod:main + ns:sub = mod:main + """, + }, + "mod.py": """ + def main(): + print("hello world") + """, + } + + def make_uppercase(self): + """ + Rewrite metadata with everything uppercase. + """ + shutil.rmtree(self.site_dir / "distinfo_pkg-1.0.0.dist-info") + files = copy.deepcopy(DistInfoPkg.files) + info = files["distinfo_pkg-1.0.0.dist-info"] + info["METADATA"] = info["METADATA"].upper() + build_files(files, self.site_dir) + + +class DistInfoPkgEditable(DistInfoPkg): + """ + Package with a PEP 660 direct_url.json. + """ + + some_hash = '524127ce937f7cb65665130c695abd18ca386f60bb29687efb976faa1596fdcc' + files: FilesSpec = { + 'distinfo_pkg-1.0.0.dist-info': { + 'direct_url.json': json.dumps({ + "archive_info": { + "hash": f"sha256={some_hash}", + "hashes": {"sha256": f"{some_hash}"}, + }, + "url": "file:///path/to/distinfo_pkg-1.0.0.editable-py3-none-any.whl", + }) + }, + } + + +class DistInfoPkgWithDot(OnSysPath, SiteBuilder): + files: FilesSpec = { + "pkg_dot-1.0.0.dist-info": { + "METADATA": """ + Name: pkg.dot + Version: 1.0.0 + """, + }, + } + + +class DistInfoPkgWithDotLegacy(OnSysPath, SiteBuilder): + files: FilesSpec = { + "pkg.dot-1.0.0.dist-info": { + "METADATA": """ + Name: pkg.dot + Version: 1.0.0 + """, + }, + "pkg.lot.egg-info": { + "METADATA": """ + Name: pkg.lot + Version: 1.0.0 + """, + }, + } + + +class DistInfoPkgOffPath(SiteBuilder): + files = DistInfoPkg.files + + +class EggInfoPkg(OnSysPath, SiteBuilder): + files: FilesSpec = { + "egginfo_pkg.egg-info": { + "PKG-INFO": """ + Name: egginfo-pkg + Author: Steven Ma + License: Unknown + Version: 1.0.0 + Classifier: Intended Audience :: Developers + Classifier: Topic :: Software Development :: Libraries + Keywords: sample package + Description: Once upon a time + There was an egginfo package + """, + "SOURCES.txt": """ + mod.py + egginfo_pkg.egg-info/top_level.txt + """, + "entry_points.txt": """ + [entries] + main = mod:main + """, + "requires.txt": """ + wheel >= 1.0; python_version >= "2.7" + [test] + pytest + """, + "top_level.txt": "mod\n", + }, + "mod.py": """ + def main(): + print("hello world") + """, + } + + +class EggInfoPkgPipInstalledNoToplevel(OnSysPath, SiteBuilder): + files: FilesSpec = { + "egg_with_module_pkg.egg-info": { + "PKG-INFO": "Name: egg_with_module-pkg", + # SOURCES.txt is made from the source archive, and contains files + # (setup.py) that are not present after installation. + "SOURCES.txt": """ + egg_with_module.py + setup.py + egg_with_module_pkg.egg-info/PKG-INFO + egg_with_module_pkg.egg-info/SOURCES.txt + egg_with_module_pkg.egg-info/top_level.txt + """, + # installed-files.txt is written by pip, and is a strictly more + # accurate source than SOURCES.txt as to the installed contents of + # the package. + "installed-files.txt": """ + ../egg_with_module.py + PKG-INFO + SOURCES.txt + top_level.txt + """, + # missing top_level.txt (to trigger fallback to installed-files.txt) + }, + "egg_with_module.py": """ + def main(): + print("hello world") + """, + } + + +class EggInfoPkgPipInstalledExternalDataFiles(OnSysPath, SiteBuilder): + files: FilesSpec = { + "egg_with_module_pkg.egg-info": { + "PKG-INFO": "Name: egg_with_module-pkg", + # SOURCES.txt is made from the source archive, and contains files + # (setup.py) that are not present after installation. + "SOURCES.txt": """ + egg_with_module.py + setup.py + egg_with_module.json + egg_with_module_pkg.egg-info/PKG-INFO + egg_with_module_pkg.egg-info/SOURCES.txt + egg_with_module_pkg.egg-info/top_level.txt + """, + # installed-files.txt is written by pip, and is a strictly more + # accurate source than SOURCES.txt as to the installed contents of + # the package. + "installed-files.txt": """ + ../../../etc/jupyter/jupyter_notebook_config.d/relative.json + /etc/jupyter/jupyter_notebook_config.d/absolute.json + ../egg_with_module.py + PKG-INFO + SOURCES.txt + top_level.txt + """, + # missing top_level.txt (to trigger fallback to installed-files.txt) + }, + "egg_with_module.py": """ + def main(): + print("hello world") + """, + } + + +class EggInfoPkgPipInstalledNoModules(OnSysPath, SiteBuilder): + files: FilesSpec = { + "egg_with_no_modules_pkg.egg-info": { + "PKG-INFO": "Name: egg_with_no_modules-pkg", + # SOURCES.txt is made from the source archive, and contains files + # (setup.py) that are not present after installation. + "SOURCES.txt": """ + setup.py + egg_with_no_modules_pkg.egg-info/PKG-INFO + egg_with_no_modules_pkg.egg-info/SOURCES.txt + egg_with_no_modules_pkg.egg-info/top_level.txt + """, + # installed-files.txt is written by pip, and is a strictly more + # accurate source than SOURCES.txt as to the installed contents of + # the package. + "installed-files.txt": """ + PKG-INFO + SOURCES.txt + top_level.txt + """, + # top_level.txt correctly reflects that no modules are installed + "top_level.txt": b"\n", + }, + } + + +class EggInfoPkgSourcesFallback(OnSysPath, SiteBuilder): + files: FilesSpec = { + "sources_fallback_pkg.egg-info": { + "PKG-INFO": "Name: sources_fallback-pkg", + # SOURCES.txt is made from the source archive, and contains files + # (setup.py) that are not present after installation. + "SOURCES.txt": """ + sources_fallback.py + setup.py + sources_fallback_pkg.egg-info/PKG-INFO + sources_fallback_pkg.egg-info/SOURCES.txt + """, + # missing installed-files.txt (i.e. not installed by pip) and + # missing top_level.txt (to trigger fallback to SOURCES.txt) + }, + "sources_fallback.py": """ + def main(): + print("hello world") + """, + } + + +class EggInfoFile(OnSysPath, SiteBuilder): + files: FilesSpec = { + "egginfo_file.egg-info": """ + Metadata-Version: 1.0 + Name: egginfo_file + Version: 0.1 + Summary: An example package + Home-page: www.example.com + Author: Eric Haffa-Vee + Author-email: eric@example.coms + License: UNKNOWN + Description: UNKNOWN + Platform: UNKNOWN + """, + } + + +# dedent all text strings before writing +orig = _path.create.registry[str] +_path.create.register(str, lambda content, path: orig(DALS(content), path)) + + +build_files = _path.build + + +def build_record(file_defs): + return ''.join(f'{name},,\n' for name in record_names(file_defs)) + + +def record_names(file_defs): + recording = _path.Recording() + _path.build(file_defs, recording) + return recording.record + + +class FileBuilder: + def unicode_filename(self): + return os_helper.FS_NONASCII or self.skip( + "File system does not support non-ascii." + ) + + +def DALS(str): + "Dedent and left-strip" + return textwrap.dedent(str).lstrip() + + +@requires_zlib() +class ZipFixtures: + root = 'test.test_importlib.metadata.data' + + def _fixture_on_path(self, filename): + pkg_file = resources.files(self.root).joinpath(filename) + file = self.resources.enter_context(resources.as_file(pkg_file)) + assert file.name.startswith('example'), file.name + sys.path.insert(0, str(file)) + self.resources.callback(sys.path.pop, 0) + + def setUp(self): + # Add self.zip_name to the front of sys.path. + self.resources = contextlib.ExitStack() + self.addCleanup(self.resources.close) + + +def parameterize(*args_set): + """Run test method with a series of parameters.""" + + def wrapper(func): + @functools.wraps(func) + def _inner(self): + for args in args_set: + with self.subTest(**args): + func(self, **args) + + return _inner + + return wrapper diff --git a/stdlib/test/test_importlib/metadata/stubs.py b/stdlib/test/test_importlib/metadata/stubs.py new file mode 100644 index 00000000..e5b011c3 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/stubs.py @@ -0,0 +1,10 @@ +import unittest + + +class fake_filesystem_unittest: + """ + Stubbed version of the pyfakefs module + """ + class TestCase(unittest.TestCase): + def setUpPyfakefs(self): + self.skipTest("pyfakefs not available") diff --git a/stdlib/test/test_importlib/metadata/test_api.py b/stdlib/test/test_importlib/metadata/test_api.py new file mode 100644 index 00000000..2256e0c5 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/test_api.py @@ -0,0 +1,323 @@ +import re +import textwrap +import unittest +import warnings +import importlib +import contextlib + +from . import fixtures +from importlib.metadata import ( + Distribution, + PackageNotFoundError, + distribution, + entry_points, + files, + metadata, + requires, + version, +) + + +@contextlib.contextmanager +def suppress_known_deprecation(): + with warnings.catch_warnings(record=True) as ctx: + warnings.simplefilter('default', category=DeprecationWarning) + yield ctx + + +class APITests( + fixtures.EggInfoPkg, + fixtures.EggInfoPkgPipInstalledNoToplevel, + fixtures.EggInfoPkgPipInstalledNoModules, + fixtures.EggInfoPkgPipInstalledExternalDataFiles, + fixtures.EggInfoPkgSourcesFallback, + fixtures.DistInfoPkg, + fixtures.DistInfoPkgWithDot, + fixtures.EggInfoFile, + unittest.TestCase, +): + version_pattern = r'\d+\.\d+(\.\d)?' + + def test_retrieves_version_of_self(self): + pkg_version = version('egginfo-pkg') + assert isinstance(pkg_version, str) + assert re.match(self.version_pattern, pkg_version) + + def test_retrieves_version_of_distinfo_pkg(self): + pkg_version = version('distinfo-pkg') + assert isinstance(pkg_version, str) + assert re.match(self.version_pattern, pkg_version) + + def test_for_name_does_not_exist(self): + with self.assertRaises(PackageNotFoundError): + distribution('does-not-exist') + + def test_name_normalization(self): + names = 'pkg.dot', 'pkg_dot', 'pkg-dot', 'pkg..dot', 'Pkg.Dot' + for name in names: + with self.subTest(name): + assert distribution(name).metadata['Name'] == 'pkg.dot' + + def test_prefix_not_matched(self): + prefixes = 'p', 'pkg', 'pkg.' + for prefix in prefixes: + with self.subTest(prefix): + with self.assertRaises(PackageNotFoundError): + distribution(prefix) + + def test_for_top_level(self): + tests = [ + ('egginfo-pkg', 'mod'), + ('egg_with_no_modules-pkg', ''), + ] + for pkg_name, expect_content in tests: + with self.subTest(pkg_name): + self.assertEqual( + distribution(pkg_name).read_text('top_level.txt').strip(), + expect_content, + ) + + def test_read_text(self): + tests = [ + ('egginfo-pkg', 'mod\n'), + ('egg_with_no_modules-pkg', '\n'), + ] + for pkg_name, expect_content in tests: + with self.subTest(pkg_name): + top_level = [ + path for path in files(pkg_name) if path.name == 'top_level.txt' + ][0] + self.assertEqual(top_level.read_text(), expect_content) + + def test_entry_points(self): + eps = entry_points() + assert 'entries' in eps.groups + entries = eps.select(group='entries') + assert 'main' in entries.names + ep = entries['main'] + self.assertEqual(ep.value, 'mod:main') + self.assertEqual(ep.extras, []) + + def test_entry_points_distribution(self): + entries = entry_points(group='entries') + for entry in ("main", "ns:sub"): + ep = entries[entry] + self.assertIn(ep.dist.name, ('distinfo-pkg', 'egginfo-pkg')) + self.assertEqual(ep.dist.version, "1.0.0") + + def test_entry_points_unique_packages_normalized(self): + """ + Entry points should only be exposed for the first package + on sys.path with a given name (even when normalized). + """ + alt_site_dir = self.fixtures.enter_context(fixtures.tmp_path()) + self.fixtures.enter_context(self.add_sys_path(alt_site_dir)) + alt_pkg = { + "DistInfo_pkg-1.1.0.dist-info": { + "METADATA": """ + Name: distinfo-pkg + Version: 1.1.0 + """, + "entry_points.txt": """ + [entries] + main = mod:altmain + """, + }, + } + fixtures.build_files(alt_pkg, alt_site_dir) + entries = entry_points(group='entries') + assert not any( + ep.dist.name == 'distinfo-pkg' and ep.dist.version == '1.0.0' + for ep in entries + ) + # ns:sub doesn't exist in alt_pkg + assert 'ns:sub' not in entries.names + + def test_entry_points_missing_name(self): + with self.assertRaises(KeyError): + entry_points(group='entries')['missing'] + + def test_entry_points_missing_group(self): + assert entry_points(group='missing') == () + + def test_entry_points_allows_no_attributes(self): + ep = entry_points().select(group='entries', name='main') + with self.assertRaises(AttributeError): + ep.foo = 4 + + def test_metadata_for_this_package(self): + md = metadata('egginfo-pkg') + assert md['author'] == 'Steven Ma' + assert md['LICENSE'] == 'Unknown' + assert md['Name'] == 'egginfo-pkg' + classifiers = md.get_all('Classifier') + assert 'Topic :: Software Development :: Libraries' in classifiers + + def test_missing_key_legacy(self): + """ + Requesting a missing key will still return None, but warn. + """ + md = metadata('distinfo-pkg') + with suppress_known_deprecation(): + assert md['does-not-exist'] is None + + def test_get_key(self): + """ + Getting a key gets the key. + """ + md = metadata('egginfo-pkg') + assert md.get('Name') == 'egginfo-pkg' + + def test_get_missing_key(self): + """ + Requesting a missing key will return None. + """ + md = metadata('distinfo-pkg') + assert md.get('does-not-exist') is None + + @staticmethod + def _test_files(files): + root = files[0].root + for file in files: + assert file.root == root + assert not file.hash or file.hash.value + assert not file.hash or file.hash.mode == 'sha256' + assert not file.size or file.size >= 0 + assert file.locate().exists() + assert isinstance(file.read_binary(), bytes) + if file.name.endswith('.py'): + file.read_text() + + def test_file_hash_repr(self): + util = [p for p in files('distinfo-pkg') if p.name == 'mod.py'][0] + self.assertRegex(repr(util.hash), '') + + def test_files_dist_info(self): + self._test_files(files('distinfo-pkg')) + + def test_files_egg_info(self): + self._test_files(files('egginfo-pkg')) + self._test_files(files('egg_with_module-pkg')) + self._test_files(files('egg_with_no_modules-pkg')) + self._test_files(files('sources_fallback-pkg')) + + def test_version_egg_info_file(self): + self.assertEqual(version('egginfo-file'), '0.1') + + def test_requires_egg_info_file(self): + requirements = requires('egginfo-file') + self.assertIsNone(requirements) + + def test_requires_egg_info(self): + deps = requires('egginfo-pkg') + assert len(deps) == 2 + assert any(dep == 'wheel >= 1.0; python_version >= "2.7"' for dep in deps) + + def test_requires_egg_info_empty(self): + fixtures.build_files( + { + 'requires.txt': '', + }, + self.site_dir.joinpath('egginfo_pkg.egg-info'), + ) + deps = requires('egginfo-pkg') + assert deps == [] + + def test_requires_dist_info(self): + deps = requires('distinfo-pkg') + assert len(deps) == 2 + assert all(deps) + assert 'wheel >= 1.0' in deps + assert "pytest; extra == 'test'" in deps + + def test_more_complex_deps_requires_text(self): + requires = textwrap.dedent( + """ + dep1 + dep2 + + [:python_version < "3"] + dep3 + + [extra1] + dep4 + dep6@ git+https://example.com/python/dep.git@v1.0.0 + + [extra2:python_version < "3"] + dep5 + """ + ) + deps = sorted(Distribution._deps_from_requires_text(requires)) + expected = [ + 'dep1', + 'dep2', + 'dep3; python_version < "3"', + 'dep4; extra == "extra1"', + 'dep5; (python_version < "3") and extra == "extra2"', + 'dep6@ git+https://example.com/python/dep.git@v1.0.0 ; extra == "extra1"', + ] + # It's important that the environment marker expression be + # wrapped in parentheses to avoid the following 'and' binding more + # tightly than some other part of the environment expression. + + assert deps == expected + + def test_as_json(self): + md = metadata('distinfo-pkg').json + assert 'name' in md + assert md['keywords'] == ['sample', 'package'] + desc = md['description'] + assert desc.startswith('Once upon a time\nThere was') + assert len(md['requires_dist']) == 2 + + def test_as_json_egg_info(self): + md = metadata('egginfo-pkg').json + assert 'name' in md + assert md['keywords'] == ['sample', 'package'] + desc = md['description'] + assert desc.startswith('Once upon a time\nThere was') + assert len(md['classifier']) == 2 + + def test_as_json_odd_case(self): + self.make_uppercase() + md = metadata('distinfo-pkg').json + assert 'name' in md + assert len(md['requires_dist']) == 2 + assert md['keywords'] == ['SAMPLE', 'PACKAGE'] + + +class LegacyDots(fixtures.DistInfoPkgWithDotLegacy, unittest.TestCase): + def test_name_normalization(self): + names = 'pkg.dot', 'pkg_dot', 'pkg-dot', 'pkg..dot', 'Pkg.Dot' + for name in names: + with self.subTest(name): + assert distribution(name).metadata['Name'] == 'pkg.dot' + + def test_name_normalization_versionless_egg_info(self): + names = 'pkg.lot', 'pkg_lot', 'pkg-lot', 'pkg..lot', 'Pkg.Lot' + for name in names: + with self.subTest(name): + assert distribution(name).metadata['Name'] == 'pkg.lot' + + +class OffSysPathTests(fixtures.DistInfoPkgOffPath, unittest.TestCase): + def test_find_distributions_specified_path(self): + dists = Distribution.discover(path=[str(self.site_dir)]) + assert any(dist.metadata['Name'] == 'distinfo-pkg' for dist in dists) + + def test_distribution_at_pathlib(self): + """Demonstrate how to load metadata direct from a directory.""" + dist_info_path = self.site_dir / 'distinfo_pkg-1.0.0.dist-info' + dist = Distribution.at(dist_info_path) + assert dist.version == '1.0.0' + + def test_distribution_at_str(self): + dist_info_path = self.site_dir / 'distinfo_pkg-1.0.0.dist-info' + dist = Distribution.at(str(dist_info_path)) + assert dist.version == '1.0.0' + + +class InvalidateCache(unittest.TestCase): + def test_invalidate_cache(self): + # No externally observable behavior, but ensures test coverage... + importlib.invalidate_caches() diff --git a/stdlib/test/test_importlib/metadata/test_main.py b/stdlib/test/test_importlib/metadata/test_main.py new file mode 100644 index 00000000..e4218076 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/test_main.py @@ -0,0 +1,468 @@ +import re +import pickle +import unittest +import warnings +import importlib +import importlib.metadata +import contextlib +from test.support import os_helper + +try: + import pyfakefs.fake_filesystem_unittest as ffs +except ImportError: + from .stubs import fake_filesystem_unittest as ffs + +from . import fixtures +from ._context import suppress +from ._path import Symlink +from importlib.metadata import ( + Distribution, + EntryPoint, + PackageNotFoundError, + _unique, + distributions, + entry_points, + metadata, + packages_distributions, + version, +) + + +@contextlib.contextmanager +def suppress_known_deprecation(): + with warnings.catch_warnings(record=True) as ctx: + warnings.simplefilter('default', category=DeprecationWarning) + yield ctx + + +class BasicTests(fixtures.DistInfoPkg, unittest.TestCase): + version_pattern = r'\d+\.\d+(\.\d)?' + + def test_retrieves_version_of_self(self): + dist = Distribution.from_name('distinfo-pkg') + assert isinstance(dist.version, str) + assert re.match(self.version_pattern, dist.version) + + def test_for_name_does_not_exist(self): + with self.assertRaises(PackageNotFoundError): + Distribution.from_name('does-not-exist') + + def test_package_not_found_mentions_metadata(self): + """ + When a package is not found, that could indicate that the + package is not installed or that it is installed without + metadata. Ensure the exception mentions metadata to help + guide users toward the cause. See #124. + """ + with self.assertRaises(PackageNotFoundError) as ctx: + Distribution.from_name('does-not-exist') + + assert "metadata" in str(ctx.exception) + + # expected to fail until ABC is enforced + @suppress(AssertionError) + @suppress_known_deprecation() + def test_abc_enforced(self): + with self.assertRaises(TypeError): + type('DistributionSubclass', (Distribution,), {})() + + @fixtures.parameterize( + dict(name=None), + dict(name=''), + ) + def test_invalid_inputs_to_from_name(self, name): + with self.assertRaises(Exception): + Distribution.from_name(name) + + +class ImportTests(fixtures.DistInfoPkg, unittest.TestCase): + def test_import_nonexistent_module(self): + # Ensure that the MetadataPathFinder does not crash an import of a + # non-existent module. + with self.assertRaises(ImportError): + importlib.import_module('does_not_exist') + + def test_resolve(self): + ep = entry_points(group='entries')['main'] + self.assertEqual(ep.load().__name__, "main") + + def test_entrypoint_with_colon_in_name(self): + ep = entry_points(group='entries')['ns:sub'] + self.assertEqual(ep.value, 'mod:main') + + def test_resolve_without_attr(self): + ep = EntryPoint( + name='ep', + value='importlib.metadata', + group='grp', + ) + assert ep.load() is importlib.metadata + + +class NameNormalizationTests(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase): + @staticmethod + def make_pkg(name): + """ + Create minimal metadata for a dist-info package with + the indicated name on the file system. + """ + return { + f'{name}.dist-info': { + 'METADATA': 'VERSION: 1.0\n', + }, + } + + def test_dashes_in_dist_name_found_as_underscores(self): + """ + For a package with a dash in the name, the dist-info metadata + uses underscores in the name. Ensure the metadata loads. + """ + fixtures.build_files(self.make_pkg('my_pkg'), self.site_dir) + assert version('my-pkg') == '1.0' + + def test_dist_name_found_as_any_case(self): + """ + Ensure the metadata loads when queried with any case. + """ + pkg_name = 'CherryPy' + fixtures.build_files(self.make_pkg(pkg_name), self.site_dir) + assert version(pkg_name) == '1.0' + assert version(pkg_name.lower()) == '1.0' + assert version(pkg_name.upper()) == '1.0' + + def test_unique_distributions(self): + """ + Two distributions varying only by non-normalized name on + the file system should resolve as the same. + """ + fixtures.build_files(self.make_pkg('abc'), self.site_dir) + before = list(_unique(distributions())) + + alt_site_dir = self.fixtures.enter_context(fixtures.tmp_path()) + self.fixtures.enter_context(self.add_sys_path(alt_site_dir)) + fixtures.build_files(self.make_pkg('ABC'), alt_site_dir) + after = list(_unique(distributions())) + + assert len(after) == len(before) + + +class NonASCIITests(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase): + @staticmethod + def pkg_with_non_ascii_description(site_dir): + """ + Create minimal metadata for a package with non-ASCII in + the description. + """ + contents = { + 'portend.dist-info': { + 'METADATA': 'Description: pôrˈtend', + }, + } + fixtures.build_files(contents, site_dir) + return 'portend' + + @staticmethod + def pkg_with_non_ascii_description_egg_info(site_dir): + """ + Create minimal metadata for an egg-info package with + non-ASCII in the description. + """ + contents = { + 'portend.dist-info': { + 'METADATA': """ + Name: portend + + pôrˈtend""", + }, + } + fixtures.build_files(contents, site_dir) + return 'portend' + + def test_metadata_loads(self): + pkg_name = self.pkg_with_non_ascii_description(self.site_dir) + meta = metadata(pkg_name) + assert meta['Description'] == 'pôrˈtend' + + def test_metadata_loads_egg_info(self): + pkg_name = self.pkg_with_non_ascii_description_egg_info(self.site_dir) + meta = metadata(pkg_name) + assert meta['Description'] == 'pôrˈtend' + + +class DiscoveryTests( + fixtures.EggInfoPkg, + fixtures.EggInfoPkgPipInstalledNoToplevel, + fixtures.EggInfoPkgPipInstalledNoModules, + fixtures.EggInfoPkgSourcesFallback, + fixtures.DistInfoPkg, + unittest.TestCase, +): + def test_package_discovery(self): + dists = list(distributions()) + assert all(isinstance(dist, Distribution) for dist in dists) + assert any(dist.metadata['Name'] == 'egginfo-pkg' for dist in dists) + assert any(dist.metadata['Name'] == 'egg_with_module-pkg' for dist in dists) + assert any(dist.metadata['Name'] == 'egg_with_no_modules-pkg' for dist in dists) + assert any(dist.metadata['Name'] == 'sources_fallback-pkg' for dist in dists) + assert any(dist.metadata['Name'] == 'distinfo-pkg' for dist in dists) + + def test_invalid_usage(self): + with self.assertRaises(ValueError): + list(distributions(context='something', name='else')) + + def test_interleaved_discovery(self): + """ + Ensure interleaved searches are safe. + + When the search is cached, it is possible for searches to be + interleaved, so make sure those use-cases are safe. + + Ref #293 + """ + dists = distributions() + next(dists) + version('egginfo-pkg') + next(dists) + + +class DirectoryTest(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase): + def test_egg_info(self): + # make an `EGG-INFO` directory that's unrelated + self.site_dir.joinpath('EGG-INFO').mkdir() + # used to crash with `IsADirectoryError` + with self.assertRaises(PackageNotFoundError): + version('unknown-package') + + def test_egg(self): + egg = self.site_dir.joinpath('foo-3.6.egg') + egg.mkdir() + with self.add_sys_path(egg): + with self.assertRaises(PackageNotFoundError): + version('foo') + + +class MissingSysPath(fixtures.OnSysPath, unittest.TestCase): + site_dir = '/does-not-exist' + + def test_discovery(self): + """ + Discovering distributions should succeed even if + there is an invalid path on sys.path. + """ + importlib.metadata.distributions() + + +class InaccessibleSysPath(fixtures.OnSysPath, ffs.TestCase): + site_dir = '/access-denied' + + def setUp(self): + super().setUp() + self.setUpPyfakefs() + self.fs.create_dir(self.site_dir, perm_bits=000) + + def test_discovery(self): + """ + Discovering distributions should succeed even if + there is an invalid path on sys.path. + """ + list(importlib.metadata.distributions()) + + +class TestEntryPoints(unittest.TestCase): + def __init__(self, *args): + super().__init__(*args) + self.ep = importlib.metadata.EntryPoint( + name='name', value='value', group='group' + ) + + def test_entry_point_pickleable(self): + revived = pickle.loads(pickle.dumps(self.ep)) + assert revived == self.ep + + def test_positional_args(self): + """ + Capture legacy (namedtuple) construction, discouraged. + """ + EntryPoint('name', 'value', 'group') + + def test_immutable(self): + """EntryPoints should be immutable""" + with self.assertRaises(AttributeError): + self.ep.name = 'badactor' + + def test_repr(self): + assert 'EntryPoint' in repr(self.ep) + assert 'name=' in repr(self.ep) + assert "'name'" in repr(self.ep) + + def test_hashable(self): + """EntryPoints should be hashable""" + hash(self.ep) + + def test_module(self): + assert self.ep.module == 'value' + + def test_attr(self): + assert self.ep.attr is None + + def test_sortable(self): + """ + EntryPoint objects are sortable, but result is undefined. + """ + sorted([ + EntryPoint(name='b', value='val', group='group'), + EntryPoint(name='a', value='val', group='group'), + ]) + + +class FileSystem( + fixtures.OnSysPath, fixtures.SiteDir, fixtures.FileBuilder, unittest.TestCase +): + def test_unicode_dir_on_sys_path(self): + """ + Ensure a Unicode subdirectory of a directory on sys.path + does not crash. + """ + fixtures.build_files( + {self.unicode_filename(): {}}, + prefix=self.site_dir, + ) + list(distributions()) + + +class PackagesDistributionsPrebuiltTest(fixtures.ZipFixtures, unittest.TestCase): + def test_packages_distributions_example(self): + self._fixture_on_path('example-21.12-py3-none-any.whl') + assert packages_distributions()['example'] == ['example'] + + def test_packages_distributions_example2(self): + """ + Test packages_distributions on a wheel built + by trampolim. + """ + self._fixture_on_path('example2-1.0.0-py3-none-any.whl') + assert packages_distributions()['example2'] == ['example2'] + + +class PackagesDistributionsTest( + fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase +): + def test_packages_distributions_neither_toplevel_nor_files(self): + """ + Test a package built without 'top-level.txt' or a file list. + """ + fixtures.build_files( + { + 'trim_example-1.0.0.dist-info': { + 'METADATA': """ + Name: trim_example + Version: 1.0.0 + """, + } + }, + prefix=self.site_dir, + ) + packages_distributions() + + def test_packages_distributions_all_module_types(self): + """ + Test top-level modules detected on a package without 'top-level.txt'. + """ + suffixes = importlib.machinery.all_suffixes() + metadata = dict( + METADATA=""" + Name: all_distributions + Version: 1.0.0 + """, + ) + files = { + 'all_distributions-1.0.0.dist-info': metadata, + } + for i, suffix in enumerate(suffixes): + files.update({ + f'importable-name {i}{suffix}': '', + f'in_namespace_{i}': { + f'mod{suffix}': '', + }, + f'in_package_{i}': { + '__init__.py': '', + f'mod{suffix}': '', + }, + }) + metadata.update(RECORD=fixtures.build_record(files)) + fixtures.build_files(files, prefix=self.site_dir) + + distributions = packages_distributions() + + for i in range(len(suffixes)): + assert distributions[f'importable-name {i}'] == ['all_distributions'] + assert distributions[f'in_namespace_{i}'] == ['all_distributions'] + assert distributions[f'in_package_{i}'] == ['all_distributions'] + + assert not any(name.endswith('.dist-info') for name in distributions) + + @os_helper.skip_unless_symlink + def test_packages_distributions_symlinked_top_level(self) -> None: + """ + Distribution is resolvable from a simple top-level symlink in RECORD. + See #452. + """ + + files: fixtures.FilesSpec = { + "symlinked_pkg-1.0.0.dist-info": { + "METADATA": """ + Name: symlinked-pkg + Version: 1.0.0 + """, + "RECORD": "symlinked,,\n", + }, + ".symlink.target": {}, + "symlinked": Symlink(".symlink.target"), + } + + fixtures.build_files(files, self.site_dir) + assert packages_distributions()['symlinked'] == ['symlinked-pkg'] + + +class PackagesDistributionsEggTest( + fixtures.EggInfoPkg, + fixtures.EggInfoPkgPipInstalledNoToplevel, + fixtures.EggInfoPkgPipInstalledNoModules, + fixtures.EggInfoPkgSourcesFallback, + unittest.TestCase, +): + def test_packages_distributions_on_eggs(self): + """ + Test old-style egg packages with a variation of 'top_level.txt', + 'SOURCES.txt', and 'installed-files.txt', available. + """ + distributions = packages_distributions() + + def import_names_from_package(package_name): + return { + import_name + for import_name, package_names in distributions.items() + if package_name in package_names + } + + # egginfo-pkg declares one import ('mod') via top_level.txt + assert import_names_from_package('egginfo-pkg') == {'mod'} + + # egg_with_module-pkg has one import ('egg_with_module') inferred from + # installed-files.txt (top_level.txt is missing) + assert import_names_from_package('egg_with_module-pkg') == {'egg_with_module'} + + # egg_with_no_modules-pkg should not be associated with any import names + # (top_level.txt is empty, and installed-files.txt has no .py files) + assert import_names_from_package('egg_with_no_modules-pkg') == set() + + # sources_fallback-pkg has one import ('sources_fallback') inferred from + # SOURCES.txt (top_level.txt and installed-files.txt is missing) + assert import_names_from_package('sources_fallback-pkg') == {'sources_fallback'} + + +class EditableDistributionTest(fixtures.DistInfoPkgEditable, unittest.TestCase): + def test_origin(self): + dist = Distribution.from_name('distinfo-pkg') + assert dist.origin.url.endswith('.whl') + assert dist.origin.archive_info.hashes.sha256 diff --git a/stdlib/test/test_importlib/metadata/test_zip.py b/stdlib/test/test_importlib/metadata/test_zip.py new file mode 100644 index 00000000..276f6288 --- /dev/null +++ b/stdlib/test/test_importlib/metadata/test_zip.py @@ -0,0 +1,62 @@ +import sys +import unittest + +from . import fixtures +from importlib.metadata import ( + PackageNotFoundError, + distribution, + distributions, + entry_points, + files, + version, +) + + +class TestZip(fixtures.ZipFixtures, unittest.TestCase): + def setUp(self): + super().setUp() + self._fixture_on_path('example-21.12-py3-none-any.whl') + + def test_zip_version(self): + self.assertEqual(version('example'), '21.12') + + def test_zip_version_does_not_match(self): + with self.assertRaises(PackageNotFoundError): + version('definitely-not-installed') + + def test_zip_entry_points(self): + scripts = entry_points(group='console_scripts') + entry_point = scripts['example'] + self.assertEqual(entry_point.value, 'example:main') + entry_point = scripts['Example'] + self.assertEqual(entry_point.value, 'example:main') + + def test_missing_metadata(self): + self.assertIsNone(distribution('example').read_text('does not exist')) + + def test_case_insensitive(self): + self.assertEqual(version('Example'), '21.12') + + def test_files(self): + for file in files('example'): + path = str(file.dist.locate_file(file)) + assert '.whl/' in path, path + + def test_one_distribution(self): + dists = list(distributions(path=sys.path[:1])) + assert len(dists) == 1 + + +class TestEgg(TestZip): + def setUp(self): + super().setUp() + self._fixture_on_path('example-21.12-py3.6.egg') + + def test_files(self): + for file in files('example'): + path = str(file.dist.locate_file(file)) + assert '.egg/' in path, path + + def test_normalized_name(self): + dist = distribution('example') + assert dist._normalized_name == 'example' diff --git a/stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/one.py b/stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/one.py new file mode 100644 index 00000000..3080f6f8 --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/one.py @@ -0,0 +1 @@ +attr = 'both_portions foo one' diff --git a/stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/two.py b/stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/two.py new file mode 100644 index 00000000..4131d3d4 --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/both_portions/foo/two.py @@ -0,0 +1 @@ +attr = 'both_portions foo two' diff --git a/stdlib/test/test_importlib/namespace_pkgs/missing_directory.zip b/stdlib/test/test_importlib/namespace_pkgs/missing_directory.zip new file mode 100644 index 0000000000000000000000000000000000000000..836a9106bcdd5d171dcf54386bb51e0f7b6a520c GIT binary patch literal 515 zcmWIWW@h1H0D)bqOB}!qD8a%Y!;q9%q#qi>$-rzseX)NM5SLbPGcdBeU}j(d69Fi? zUGA0cQwHh=VJ@idlJb1Lf=ajG`=B3A{WEQ0+m*f{!Dx~G- zD**MYb0MtR19arK*^@P-fL4Go$QqzB{rtRCm^CgyE1Ym!Q;=U&l9``p2sRz44P-ha zlN>XyK#&010s;aIe;q+IBuH2xL4pw+s3xHX2*e~tpcz{l?Vu*Xf`_nqm_A1~Zz<3` b`_$-w-Wd$GUjw8j3V z72FJrEH9WD7{EjT+$43?B`79|U@<8zKObV67SJR+LZ*G2Jy}Bv=q?DxbQj39{Jd1X zf=aLpL1wCBnweNqQlwz3pbqnn0#KU*P@6hefHxzP95b$PkbsBCUq=uVGgMe1p@I=2 z2vae`1ld$CET%$22xv0MHv~*Z4IhZfj6gHDG|s?bGAy)kna|1w)X2aLgaSZ=*g%Fc F003}~b~XS2 literal 0 HcmV?d00001 diff --git a/stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/__init__.py b/stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/one.py b/stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/one.py new file mode 100644 index 00000000..d8f5c831 --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/not_a_namespace_pkg/foo/one.py @@ -0,0 +1 @@ +attr = 'portion1 foo one' diff --git a/stdlib/test/test_importlib/namespace_pkgs/portion1/foo/one.py b/stdlib/test/test_importlib/namespace_pkgs/portion1/foo/one.py new file mode 100644 index 00000000..d8f5c831 --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/portion1/foo/one.py @@ -0,0 +1 @@ +attr = 'portion1 foo one' diff --git a/stdlib/test/test_importlib/namespace_pkgs/portion2/foo/two.py b/stdlib/test/test_importlib/namespace_pkgs/portion2/foo/two.py new file mode 100644 index 00000000..d092e1e9 --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/portion2/foo/two.py @@ -0,0 +1 @@ +attr = 'portion2 foo two' diff --git a/stdlib/test/test_importlib/namespace_pkgs/project1/parent/child/one.py b/stdlib/test/test_importlib/namespace_pkgs/project1/parent/child/one.py new file mode 100644 index 00000000..2776fcdf --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/project1/parent/child/one.py @@ -0,0 +1 @@ +attr = 'parent child one' diff --git a/stdlib/test/test_importlib/namespace_pkgs/project2/parent/child/two.py b/stdlib/test/test_importlib/namespace_pkgs/project2/parent/child/two.py new file mode 100644 index 00000000..8b037bcb --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/project2/parent/child/two.py @@ -0,0 +1 @@ +attr = 'parent child two' diff --git a/stdlib/test/test_importlib/namespace_pkgs/project3/parent/child/three.py b/stdlib/test/test_importlib/namespace_pkgs/project3/parent/child/three.py new file mode 100644 index 00000000..f8abfe1c --- /dev/null +++ b/stdlib/test/test_importlib/namespace_pkgs/project3/parent/child/three.py @@ -0,0 +1 @@ +attr = 'parent child three' diff --git a/stdlib/test/test_importlib/namespace_pkgs/top_level_portion1.zip b/stdlib/test/test_importlib/namespace_pkgs/top_level_portion1.zip new file mode 100644 index 0000000000000000000000000000000000000000..3b866c914ad2f2fe348405799a482235854bac10 GIT binary patch literal 332 zcmWIWW@h1H00B0&B@SQ)lwe_yVMxo**AEThWMDoseX;*TATF)oW?*D_!OXw_CIV1& zf15p7Lkg%Hgt?%)^Yc>m3M%1doWL|Av81F(!B#=NAit<2Ge6Hz0cfcLP@6hefHxzP z95XK0NkH8x!0^`*#Dut&72;M5ccPkv>QabFj6gHCG}=K;g1H-)d8}+8JDGrR7Lc9; H;xGUJj8#CG literal 0 HcmV?d00001 diff --git a/stdlib/test/test_importlib/partial/cfimport.py b/stdlib/test/test_importlib/partial/cfimport.py new file mode 100644 index 00000000..c92d2fe1 --- /dev/null +++ b/stdlib/test/test_importlib/partial/cfimport.py @@ -0,0 +1,38 @@ +import os +import sys +import threading +import traceback + + +NLOOPS = 50 +NTHREADS = 30 + + +def t1(): + try: + from concurrent.futures import ThreadPoolExecutor + except Exception: + traceback.print_exc() + os._exit(1) + +def t2(): + try: + from concurrent.futures.thread import ThreadPoolExecutor + except Exception: + traceback.print_exc() + os._exit(1) + +def main(): + for j in range(NLOOPS): + threads = [] + for i in range(NTHREADS): + threads.append(threading.Thread(target=t2 if i % 1 else t1)) + for thread in threads: + thread.start() + for thread in threads: + thread.join() + sys.modules.pop('concurrent.futures', None) + sys.modules.pop('concurrent.futures.thread', None) + +if __name__ == "__main__": + main() diff --git a/stdlib/test/test_importlib/partial/pool_in_threads.py b/stdlib/test/test_importlib/partial/pool_in_threads.py new file mode 100644 index 00000000..faa7867b --- /dev/null +++ b/stdlib/test/test_importlib/partial/pool_in_threads.py @@ -0,0 +1,27 @@ +import multiprocessing +import os +import threading +import traceback + + +def t(): + try: + with multiprocessing.Pool(1): + pass + except Exception: + traceback.print_exc() + os._exit(1) + + +def main(): + threads = [] + for i in range(20): + threads.append(threading.Thread(target=t)) + for thread in threads: + thread.start() + for thread in threads: + thread.join() + + +if __name__ == "__main__": + main() diff --git a/stdlib/test/test_importlib/resources/__init__.py b/stdlib/test/test_importlib/resources/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/test/test_importlib/resources/_path.py b/stdlib/test/test_importlib/resources/_path.py new file mode 100644 index 00000000..b144628c --- /dev/null +++ b/stdlib/test/test_importlib/resources/_path.py @@ -0,0 +1,94 @@ +import pathlib +import functools + +from typing import Dict, Union +from typing import runtime_checkable +from typing import Protocol + + +#### +# from jaraco.path 3.7.1 + + +class Symlink(str): + """ + A string indicating the target of a symlink. + """ + + +FilesSpec = Dict[str, Union[str, bytes, Symlink, 'FilesSpec']] + + +@runtime_checkable +class TreeMaker(Protocol): + def __truediv__(self, *args, **kwargs): ... # pragma: no cover + + def mkdir(self, **kwargs): ... # pragma: no cover + + def write_text(self, content, **kwargs): ... # pragma: no cover + + def write_bytes(self, content): ... # pragma: no cover + + def symlink_to(self, target): ... # pragma: no cover + + +def _ensure_tree_maker(obj: Union[str, TreeMaker]) -> TreeMaker: + return obj if isinstance(obj, TreeMaker) else pathlib.Path(obj) # type: ignore[return-value] + + +def build( + spec: FilesSpec, + prefix: Union[str, TreeMaker] = pathlib.Path(), # type: ignore[assignment] +): + """ + Build a set of files/directories, as described by the spec. + + Each key represents a pathname, and the value represents + the content. Content may be a nested directory. + + >>> spec = { + ... 'README.txt': "A README file", + ... "foo": { + ... "__init__.py": "", + ... "bar": { + ... "__init__.py": "", + ... }, + ... "baz.py": "# Some code", + ... "bar.py": Symlink("baz.py"), + ... }, + ... "bing": Symlink("foo"), + ... } + >>> target = getfixture('tmp_path') + >>> build(spec, target) + >>> target.joinpath('foo/baz.py').read_text(encoding='utf-8') + '# Some code' + >>> target.joinpath('bing/bar.py').read_text(encoding='utf-8') + '# Some code' + """ + for name, contents in spec.items(): + create(contents, _ensure_tree_maker(prefix) / name) + + +@functools.singledispatch +def create(content: Union[str, bytes, FilesSpec], path): + path.mkdir(exist_ok=True) + build(content, prefix=path) # type: ignore[arg-type] + + +@create.register +def _(content: bytes, path): + path.write_bytes(content) + + +@create.register +def _(content: str, path): + path.write_text(content, encoding='utf-8') + + +@create.register +def _(content: Symlink, path): + path.symlink_to(content) + + +# end from jaraco.path +#### diff --git a/stdlib/test/test_importlib/resources/test_compatibilty_files.py b/stdlib/test/test_importlib/resources/test_compatibilty_files.py new file mode 100644 index 00000000..bcf608d9 --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_compatibilty_files.py @@ -0,0 +1,104 @@ +import io +import unittest + +from importlib import resources + +from importlib.resources._adapters import ( + CompatibilityFiles, + wrap_spec, +) + +from . import util + + +class CompatibilityFilesTests(unittest.TestCase): + @property + def package(self): + bytes_data = io.BytesIO(b'Hello, world!') + return util.create_package( + file=bytes_data, + path='some_path', + contents=('a', 'b', 'c'), + ) + + @property + def files(self): + return resources.files(self.package) + + def test_spec_path_iter(self): + self.assertEqual( + sorted(path.name for path in self.files.iterdir()), + ['a', 'b', 'c'], + ) + + def test_child_path_iter(self): + self.assertEqual(list((self.files / 'a').iterdir()), []) + + def test_orphan_path_iter(self): + self.assertEqual(list((self.files / 'a' / 'a').iterdir()), []) + self.assertEqual(list((self.files / 'a' / 'a' / 'a').iterdir()), []) + + def test_spec_path_is(self): + self.assertFalse(self.files.is_file()) + self.assertFalse(self.files.is_dir()) + + def test_child_path_is(self): + self.assertTrue((self.files / 'a').is_file()) + self.assertFalse((self.files / 'a').is_dir()) + + def test_orphan_path_is(self): + self.assertFalse((self.files / 'a' / 'a').is_file()) + self.assertFalse((self.files / 'a' / 'a').is_dir()) + self.assertFalse((self.files / 'a' / 'a' / 'a').is_file()) + self.assertFalse((self.files / 'a' / 'a' / 'a').is_dir()) + + def test_spec_path_name(self): + self.assertEqual(self.files.name, 'testingpackage') + + def test_child_path_name(self): + self.assertEqual((self.files / 'a').name, 'a') + + def test_orphan_path_name(self): + self.assertEqual((self.files / 'a' / 'b').name, 'b') + self.assertEqual((self.files / 'a' / 'b' / 'c').name, 'c') + + def test_spec_path_open(self): + self.assertEqual(self.files.read_bytes(), b'Hello, world!') + self.assertEqual(self.files.read_text(encoding='utf-8'), 'Hello, world!') + + def test_child_path_open(self): + self.assertEqual((self.files / 'a').read_bytes(), b'Hello, world!') + self.assertEqual( + (self.files / 'a').read_text(encoding='utf-8'), 'Hello, world!' + ) + + def test_orphan_path_open(self): + with self.assertRaises(FileNotFoundError): + (self.files / 'a' / 'b').read_bytes() + with self.assertRaises(FileNotFoundError): + (self.files / 'a' / 'b' / 'c').read_bytes() + + def test_open_invalid_mode(self): + with self.assertRaises(ValueError): + self.files.open('0') + + def test_orphan_path_invalid(self): + with self.assertRaises(ValueError): + CompatibilityFiles.OrphanPath() + + def test_wrap_spec(self): + spec = wrap_spec(self.package) + self.assertIsInstance(spec.loader.get_resource_reader(None), CompatibilityFiles) + + +class CompatibilityFilesNoReaderTests(unittest.TestCase): + @property + def package(self): + return util.create_package_from_loader(None) + + @property + def files(self): + return resources.files(self.package) + + def test_spec_path_joinpath(self): + self.assertIsInstance(self.files / 'a', CompatibilityFiles.OrphanPath) diff --git a/stdlib/test/test_importlib/resources/test_contents.py b/stdlib/test/test_importlib/resources/test_contents.py new file mode 100644 index 00000000..4e4e0e9c --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_contents.py @@ -0,0 +1,38 @@ +import unittest +from importlib import resources + +from . import util + + +class ContentsTests: + expected = { + '__init__.py', + 'binary.file', + 'subdirectory', + 'utf-16.file', + 'utf-8.file', + } + + def test_contents(self): + contents = {path.name for path in resources.files(self.data).iterdir()} + assert self.expected <= contents + + +class ContentsDiskTests(ContentsTests, util.DiskSetup, unittest.TestCase): + pass + + +class ContentsZipTests(ContentsTests, util.ZipSetup, unittest.TestCase): + pass + + +class ContentsNamespaceTests(ContentsTests, util.DiskSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + expected = { + # no __init__ because of namespace design + 'binary.file', + 'subdirectory', + 'utf-16.file', + 'utf-8.file', + } diff --git a/stdlib/test/test_importlib/resources/test_custom.py b/stdlib/test/test_importlib/resources/test_custom.py new file mode 100644 index 00000000..640f90fc --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_custom.py @@ -0,0 +1,48 @@ +import unittest +import contextlib +import pathlib + +from test.support import os_helper + +from importlib import resources +from importlib.resources import abc +from importlib.resources.abc import TraversableResources, ResourceReader +from . import util + + +class SimpleLoader: + """ + A simple loader that only implements a resource reader. + """ + + def __init__(self, reader: ResourceReader): + self.reader = reader + + def get_resource_reader(self, package): + return self.reader + + +class MagicResources(TraversableResources): + """ + Magically returns the resources at path. + """ + + def __init__(self, path: pathlib.Path): + self.path = path + + def files(self): + return self.path + + +class CustomTraversableResourcesTests(unittest.TestCase): + def setUp(self): + self.fixtures = contextlib.ExitStack() + self.addCleanup(self.fixtures.close) + + def test_custom_loader(self): + temp_dir = pathlib.Path(self.fixtures.enter_context(os_helper.temp_dir())) + loader = SimpleLoader(MagicResources(temp_dir)) + pkg = util.create_package_from_loader(loader) + files = resources.files(pkg) + assert isinstance(files, abc.Traversable) + assert list(files.iterdir()) == [] diff --git a/stdlib/test/test_importlib/resources/test_files.py b/stdlib/test/test_importlib/resources/test_files.py new file mode 100644 index 00000000..3ce44999 --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_files.py @@ -0,0 +1,191 @@ +import pathlib +import py_compile +import textwrap +import unittest +import warnings +import importlib +import contextlib + +from importlib import resources +from importlib.resources.abc import Traversable +from . import util +from test.support import os_helper, import_helper + + +@contextlib.contextmanager +def suppress_known_deprecation(): + with warnings.catch_warnings(record=True) as ctx: + warnings.simplefilter('default', category=DeprecationWarning) + yield ctx + + +class FilesTests: + def test_read_bytes(self): + files = resources.files(self.data) + actual = files.joinpath('utf-8.file').read_bytes() + assert actual == b'Hello, UTF-8 world!\n' + + def test_read_text(self): + files = resources.files(self.data) + actual = files.joinpath('utf-8.file').read_text(encoding='utf-8') + assert actual == 'Hello, UTF-8 world!\n' + + def test_traversable(self): + assert isinstance(resources.files(self.data), Traversable) + + def test_joinpath_with_multiple_args(self): + files = resources.files(self.data) + binfile = files.joinpath('subdirectory', 'binary.file') + self.assertTrue(binfile.is_file()) + + def test_old_parameter(self): + """ + Files used to take a 'package' parameter. Make sure anyone + passing by name is still supported. + """ + with suppress_known_deprecation(): + resources.files(package=self.data) + + +class OpenDiskTests(FilesTests, util.DiskSetup, unittest.TestCase): + pass + + +class OpenZipTests(FilesTests, util.ZipSetup, unittest.TestCase): + pass + + +class OpenNamespaceTests(FilesTests, util.DiskSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + def test_non_paths_in_dunder_path(self): + """ + Non-path items in a namespace package's ``__path__`` are ignored. + + As reported in python/importlib_resources#311, some tools + like Setuptools, when creating editable packages, will inject + non-paths into a namespace package's ``__path__``, a + sentinel like + ``__editable__.sample_namespace-1.0.finder.__path_hook__`` + to cause the ``PathEntryFinder`` to be called when searching + for packages. In that case, resources should still be loadable. + """ + import namespacedata01 + + namespacedata01.__path__.append( + '__editable__.sample_namespace-1.0.finder.__path_hook__' + ) + + resources.files(namespacedata01) + + +class OpenNamespaceZipTests(FilesTests, util.ZipSetup, unittest.TestCase): + ZIP_MODULE = 'namespacedata01' + + +class DirectSpec: + """ + Override behavior of ModuleSetup to write a full spec directly. + """ + + MODULE = 'unused' + + def load_fixture(self, name): + self.tree_on_path(self.spec) + + +class ModulesFiles: + spec = { + 'mod.py': '', + 'res.txt': 'resources are the best', + } + + def test_module_resources(self): + """ + A module can have resources found adjacent to the module. + """ + import mod # type: ignore[import-not-found] + + actual = resources.files(mod).joinpath('res.txt').read_text(encoding='utf-8') + assert actual == self.spec['res.txt'] + + +class ModuleFilesDiskTests(DirectSpec, util.DiskSetup, ModulesFiles, unittest.TestCase): + pass + + +class ModuleFilesZipTests(DirectSpec, util.ZipSetup, ModulesFiles, unittest.TestCase): + pass + + +class ImplicitContextFiles: + set_val = textwrap.dedent( + f""" + import {resources.__name__} as res + val = res.files().joinpath('res.txt').read_text(encoding='utf-8') + """ + ) + spec = { + 'somepkg': { + '__init__.py': set_val, + 'submod.py': set_val, + 'res.txt': 'resources are the best', + }, + 'frozenpkg': { + '__init__.py': set_val.replace(resources.__name__, 'c_resources'), + 'res.txt': 'resources are the best', + }, + } + + def test_implicit_files_package(self): + """ + Without any parameter, files() will infer the location as the caller. + """ + assert importlib.import_module('somepkg').val == 'resources are the best' + + def test_implicit_files_submodule(self): + """ + Without any parameter, files() will infer the location as the caller. + """ + assert importlib.import_module('somepkg.submod').val == 'resources are the best' + + def _compile_importlib(self): + """ + Make a compiled-only copy of the importlib resources package. + + Currently only code is copied, as importlib resources doesn't itself + have any resources. + """ + bin_site = self.fixtures.enter_context(os_helper.temp_dir()) + c_resources = pathlib.Path(bin_site, 'c_resources') + sources = pathlib.Path(resources.__file__).parent + + for source_path in sources.glob('**/*.py'): + c_path = c_resources.joinpath(source_path.relative_to(sources)).with_suffix('.pyc') + py_compile.compile(source_path, c_path) + self.fixtures.enter_context(import_helper.DirsOnSysPath(bin_site)) + + def test_implicit_files_with_compiled_importlib(self): + """ + Caller detection works for compiled-only resources module. + + python/cpython#123085 + """ + self._compile_importlib() + assert importlib.import_module('frozenpkg').val == 'resources are the best' + + +class ImplicitContextFilesDiskTests( + DirectSpec, util.DiskSetup, ImplicitContextFiles, unittest.TestCase +): + pass + + +class ImplicitContextFilesZipTests( + DirectSpec, util.ZipSetup, ImplicitContextFiles, unittest.TestCase +): + pass + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/resources/test_functional.py b/stdlib/test/test_importlib/resources/test_functional.py new file mode 100644 index 00000000..e8d25fa4 --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_functional.py @@ -0,0 +1,249 @@ +import unittest +import os +import importlib + +from test.support import warnings_helper + +from importlib import resources + +from . import util + +# Since the functional API forwards to Traversable, we only test +# filesystem resources here -- not zip files, namespace packages etc. +# We do test for two kinds of Anchor, though. + + +class StringAnchorMixin: + anchor01 = 'data01' + anchor02 = 'data02' + + +class ModuleAnchorMixin: + @property + def anchor01(self): + return importlib.import_module('data01') + + @property + def anchor02(self): + return importlib.import_module('data02') + + +class FunctionalAPIBase(util.DiskSetup): + def setUp(self): + super().setUp() + self.load_fixture('data02') + + def _gen_resourcetxt_path_parts(self): + """Yield various names of a text file in anchor02, each in a subTest""" + for path_parts in ( + ('subdirectory', 'subsubdir', 'resource.txt'), + ('subdirectory/subsubdir/resource.txt',), + ('subdirectory/subsubdir', 'resource.txt'), + ): + with self.subTest(path_parts=path_parts): + yield path_parts + + def test_read_text(self): + self.assertEqual( + resources.read_text(self.anchor01, 'utf-8.file'), + 'Hello, UTF-8 world!\n', + ) + self.assertEqual( + resources.read_text( + self.anchor02, + 'subdirectory', + 'subsubdir', + 'resource.txt', + encoding='utf-8', + ), + 'a resource', + ) + for path_parts in self._gen_resourcetxt_path_parts(): + self.assertEqual( + resources.read_text( + self.anchor02, + *path_parts, + encoding='utf-8', + ), + 'a resource', + ) + # Use generic OSError, since e.g. attempting to read a directory can + # fail with PermissionError rather than IsADirectoryError + with self.assertRaises(OSError): + resources.read_text(self.anchor01) + with self.assertRaises(OSError): + resources.read_text(self.anchor01, 'no-such-file') + with self.assertRaises(UnicodeDecodeError): + resources.read_text(self.anchor01, 'utf-16.file') + self.assertEqual( + resources.read_text( + self.anchor01, + 'binary.file', + encoding='latin1', + ), + '\x00\x01\x02\x03', + ) + self.assertEndsWith( # ignore the BOM + resources.read_text( + self.anchor01, + 'utf-16.file', + errors='backslashreplace', + ), + 'Hello, UTF-16 world!\n'.encode('utf-16-le').decode( + errors='backslashreplace', + ), + ) + + def test_read_binary(self): + self.assertEqual( + resources.read_binary(self.anchor01, 'utf-8.file'), + b'Hello, UTF-8 world!\n', + ) + for path_parts in self._gen_resourcetxt_path_parts(): + self.assertEqual( + resources.read_binary(self.anchor02, *path_parts), + b'a resource', + ) + + def test_open_text(self): + with resources.open_text(self.anchor01, 'utf-8.file') as f: + self.assertEqual(f.read(), 'Hello, UTF-8 world!\n') + for path_parts in self._gen_resourcetxt_path_parts(): + with resources.open_text( + self.anchor02, + *path_parts, + encoding='utf-8', + ) as f: + self.assertEqual(f.read(), 'a resource') + # Use generic OSError, since e.g. attempting to read a directory can + # fail with PermissionError rather than IsADirectoryError + with self.assertRaises(OSError): + resources.open_text(self.anchor01) + with self.assertRaises(OSError): + resources.open_text(self.anchor01, 'no-such-file') + with resources.open_text(self.anchor01, 'utf-16.file') as f: + with self.assertRaises(UnicodeDecodeError): + f.read() + with resources.open_text( + self.anchor01, + 'binary.file', + encoding='latin1', + ) as f: + self.assertEqual(f.read(), '\x00\x01\x02\x03') + with resources.open_text( + self.anchor01, + 'utf-16.file', + errors='backslashreplace', + ) as f: + self.assertEndsWith( # ignore the BOM + f.read(), + 'Hello, UTF-16 world!\n'.encode('utf-16-le').decode( + errors='backslashreplace', + ), + ) + + def test_open_binary(self): + with resources.open_binary(self.anchor01, 'utf-8.file') as f: + self.assertEqual(f.read(), b'Hello, UTF-8 world!\n') + for path_parts in self._gen_resourcetxt_path_parts(): + with resources.open_binary( + self.anchor02, + *path_parts, + ) as f: + self.assertEqual(f.read(), b'a resource') + + def test_path(self): + with resources.path(self.anchor01, 'utf-8.file') as path: + with open(str(path), encoding='utf-8') as f: + self.assertEqual(f.read(), 'Hello, UTF-8 world!\n') + with resources.path(self.anchor01) as path: + with open(os.path.join(path, 'utf-8.file'), encoding='utf-8') as f: + self.assertEqual(f.read(), 'Hello, UTF-8 world!\n') + + def test_is_resource(self): + is_resource = resources.is_resource + self.assertTrue(is_resource(self.anchor01, 'utf-8.file')) + self.assertFalse(is_resource(self.anchor01, 'no_such_file')) + self.assertFalse(is_resource(self.anchor01)) + self.assertFalse(is_resource(self.anchor01, 'subdirectory')) + for path_parts in self._gen_resourcetxt_path_parts(): + self.assertTrue(is_resource(self.anchor02, *path_parts)) + + def test_contents(self): + with warnings_helper.check_warnings((".*contents.*", DeprecationWarning)): + c = resources.contents(self.anchor01) + self.assertGreaterEqual( + set(c), + {'utf-8.file', 'utf-16.file', 'binary.file', 'subdirectory'}, + ) + with self.assertRaises(OSError), warnings_helper.check_warnings(( + ".*contents.*", + DeprecationWarning, + )): + list(resources.contents(self.anchor01, 'utf-8.file')) + + for path_parts in self._gen_resourcetxt_path_parts(): + with self.assertRaises(OSError), warnings_helper.check_warnings(( + ".*contents.*", + DeprecationWarning, + )): + list(resources.contents(self.anchor01, *path_parts)) + with warnings_helper.check_warnings((".*contents.*", DeprecationWarning)): + c = resources.contents(self.anchor01, 'subdirectory') + self.assertGreaterEqual( + set(c), + {'binary.file'}, + ) + + @warnings_helper.ignore_warnings(category=DeprecationWarning) + def test_common_errors(self): + for func in ( + resources.read_text, + resources.read_binary, + resources.open_text, + resources.open_binary, + resources.path, + resources.is_resource, + resources.contents, + ): + with self.subTest(func=func): + # Rejecting None anchor + with self.assertRaises(TypeError): + func(None) + # Rejecting invalid anchor type + with self.assertRaises((TypeError, AttributeError)): + func(1234) + # Unknown module + with self.assertRaises(ModuleNotFoundError): + func('$missing module$') + + def test_text_errors(self): + for func in ( + resources.read_text, + resources.open_text, + ): + with self.subTest(func=func): + # Multiple path arguments need explicit encoding argument. + with self.assertRaises(TypeError): + func( + self.anchor02, + 'subdirectory', + 'subsubdir', + 'resource.txt', + ) + + +class FunctionalAPITest_StringAnchor( + StringAnchorMixin, + FunctionalAPIBase, + unittest.TestCase, +): + pass + + +class FunctionalAPITest_ModuleAnchor( + ModuleAnchorMixin, + FunctionalAPIBase, + unittest.TestCase, +): + pass diff --git a/stdlib/test/test_importlib/resources/test_open.py b/stdlib/test/test_importlib/resources/test_open.py new file mode 100644 index 00000000..8c00378a --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_open.py @@ -0,0 +1,84 @@ +import unittest + +from importlib import resources +from . import util + + +class CommonBinaryTests(util.CommonTests, unittest.TestCase): + def execute(self, package, path): + target = resources.files(package).joinpath(path) + with target.open('rb'): + pass + + +class CommonTextTests(util.CommonTests, unittest.TestCase): + def execute(self, package, path): + target = resources.files(package).joinpath(path) + with target.open(encoding='utf-8'): + pass + + +class OpenTests: + def test_open_binary(self): + target = resources.files(self.data) / 'binary.file' + with target.open('rb') as fp: + result = fp.read() + self.assertEqual(result, bytes(range(4))) + + def test_open_text_default_encoding(self): + target = resources.files(self.data) / 'utf-8.file' + with target.open(encoding='utf-8') as fp: + result = fp.read() + self.assertEqual(result, 'Hello, UTF-8 world!\n') + + def test_open_text_given_encoding(self): + target = resources.files(self.data) / 'utf-16.file' + with target.open(encoding='utf-16', errors='strict') as fp: + result = fp.read() + self.assertEqual(result, 'Hello, UTF-16 world!\n') + + def test_open_text_with_errors(self): + """ + Raises UnicodeError without the 'errors' argument. + """ + target = resources.files(self.data) / 'utf-16.file' + with target.open(encoding='utf-8', errors='strict') as fp: + self.assertRaises(UnicodeError, fp.read) + with target.open(encoding='utf-8', errors='ignore') as fp: + result = fp.read() + self.assertEqual( + result, + 'H\x00e\x00l\x00l\x00o\x00,\x00 ' + '\x00U\x00T\x00F\x00-\x001\x006\x00 ' + '\x00w\x00o\x00r\x00l\x00d\x00!\x00\n\x00', + ) + + def test_open_binary_FileNotFoundError(self): + target = resources.files(self.data) / 'does-not-exist' + with self.assertRaises(FileNotFoundError): + target.open('rb') + + def test_open_text_FileNotFoundError(self): + target = resources.files(self.data) / 'does-not-exist' + with self.assertRaises(FileNotFoundError): + target.open(encoding='utf-8') + + +class OpenDiskTests(OpenTests, util.DiskSetup, unittest.TestCase): + pass + + +class OpenDiskNamespaceTests(OpenTests, util.DiskSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + +class OpenZipTests(OpenTests, util.ZipSetup, unittest.TestCase): + pass + + +class OpenNamespaceZipTests(OpenTests, util.ZipSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/resources/test_path.py b/stdlib/test/test_importlib/resources/test_path.py new file mode 100644 index 00000000..903911f5 --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_path.py @@ -0,0 +1,60 @@ +import io +import pathlib +import unittest + +from importlib import resources +from . import util + + +class CommonTests(util.CommonTests, unittest.TestCase): + def execute(self, package, path): + with resources.as_file(resources.files(package).joinpath(path)): + pass + + +class PathTests: + def test_reading(self): + """ + Path should be readable and a pathlib.Path instance. + """ + target = resources.files(self.data) / 'utf-8.file' + with resources.as_file(target) as path: + self.assertIsInstance(path, pathlib.Path) + self.assertEndsWith(path.name, "utf-8.file") + self.assertEqual('Hello, UTF-8 world!\n', path.read_text(encoding='utf-8')) + + +class PathDiskTests(PathTests, util.DiskSetup, unittest.TestCase): + def test_natural_path(self): + # Guarantee the internal implementation detail that + # file-system-backed resources do not get the tempdir + # treatment. + target = resources.files(self.data) / 'utf-8.file' + with resources.as_file(target) as path: + assert 'data' in str(path) + + +class PathMemoryTests(PathTests, unittest.TestCase): + def setUp(self): + file = io.BytesIO(b'Hello, UTF-8 world!\n') + self.addCleanup(file.close) + self.data = util.create_package( + file=file, path=FileNotFoundError("package exists only in memory") + ) + self.data.__spec__.origin = None + self.data.__spec__.has_location = False + + +class PathZipTests(PathTests, util.ZipSetup, unittest.TestCase): + def test_remove_in_context_manager(self): + """ + It is not an error if the file that was temporarily stashed on the + file system is removed inside the `with` stanza. + """ + target = resources.files(self.data) / 'utf-8.file' + with resources.as_file(target) as path: + path.unlink() + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/resources/test_read.py b/stdlib/test/test_importlib/resources/test_read.py new file mode 100644 index 00000000..59c237d9 --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_read.py @@ -0,0 +1,93 @@ +import unittest + +from importlib import import_module, resources + +from . import util + + +class CommonBinaryTests(util.CommonTests, unittest.TestCase): + def execute(self, package, path): + resources.files(package).joinpath(path).read_bytes() + + +class CommonTextTests(util.CommonTests, unittest.TestCase): + def execute(self, package, path): + resources.files(package).joinpath(path).read_text(encoding='utf-8') + + +class ReadTests: + def test_read_bytes(self): + result = resources.files(self.data).joinpath('binary.file').read_bytes() + self.assertEqual(result, bytes(range(4))) + + def test_read_text_default_encoding(self): + result = ( + resources.files(self.data) + .joinpath('utf-8.file') + .read_text(encoding='utf-8') + ) + self.assertEqual(result, 'Hello, UTF-8 world!\n') + + def test_read_text_given_encoding(self): + result = ( + resources.files(self.data) + .joinpath('utf-16.file') + .read_text(encoding='utf-16') + ) + self.assertEqual(result, 'Hello, UTF-16 world!\n') + + def test_read_text_with_errors(self): + """ + Raises UnicodeError without the 'errors' argument. + """ + target = resources.files(self.data) / 'utf-16.file' + self.assertRaises(UnicodeError, target.read_text, encoding='utf-8') + result = target.read_text(encoding='utf-8', errors='ignore') + self.assertEqual( + result, + 'H\x00e\x00l\x00l\x00o\x00,\x00 ' + '\x00U\x00T\x00F\x00-\x001\x006\x00 ' + '\x00w\x00o\x00r\x00l\x00d\x00!\x00\n\x00', + ) + + +class ReadDiskTests(ReadTests, util.DiskSetup, unittest.TestCase): + pass + + +class ReadZipTests(ReadTests, util.ZipSetup, unittest.TestCase): + def test_read_submodule_resource(self): + submodule = import_module('data01.subdirectory') + result = resources.files(submodule).joinpath('binary.file').read_bytes() + self.assertEqual(result, bytes(range(4, 8))) + + def test_read_submodule_resource_by_name(self): + result = ( + resources.files('data01.subdirectory').joinpath('binary.file').read_bytes() + ) + self.assertEqual(result, bytes(range(4, 8))) + + +class ReadNamespaceTests(ReadTests, util.DiskSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + +class ReadNamespaceZipTests(ReadTests, util.ZipSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + def test_read_submodule_resource(self): + submodule = import_module('namespacedata01.subdirectory') + result = resources.files(submodule).joinpath('binary.file').read_bytes() + self.assertEqual(result, bytes(range(12, 16))) + + def test_read_submodule_resource_by_name(self): + result = ( + resources.files('namespacedata01.subdirectory') + .joinpath('binary.file') + .read_bytes() + ) + self.assertEqual(result, bytes(range(12, 16))) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/resources/test_reader.py b/stdlib/test/test_importlib/resources/test_reader.py new file mode 100644 index 00000000..ed5693ab --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_reader.py @@ -0,0 +1,137 @@ +import os.path +import pathlib +import unittest + +from importlib import import_module +from importlib.readers import MultiplexedPath, NamespaceReader + +from . import util + + +class MultiplexedPathTest(util.DiskSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + def setUp(self): + super().setUp() + self.folder = pathlib.Path(self.data.__path__[0]) + self.data01 = pathlib.Path(self.load_fixture('data01').__file__).parent + self.data02 = pathlib.Path(self.load_fixture('data02').__file__).parent + + def test_init_no_paths(self): + with self.assertRaises(FileNotFoundError): + MultiplexedPath() + + def test_init_file(self): + with self.assertRaises(NotADirectoryError): + MultiplexedPath(self.folder / 'binary.file') + + def test_iterdir(self): + contents = {path.name for path in MultiplexedPath(self.folder).iterdir()} + try: + contents.remove('__pycache__') + except (KeyError, ValueError): + pass + self.assertEqual( + contents, {'subdirectory', 'binary.file', 'utf-16.file', 'utf-8.file'} + ) + + def test_iterdir_duplicate(self): + contents = { + path.name for path in MultiplexedPath(self.folder, self.data01).iterdir() + } + for remove in ('__pycache__', '__init__.pyc'): + try: + contents.remove(remove) + except (KeyError, ValueError): + pass + self.assertEqual( + contents, + {'__init__.py', 'binary.file', 'subdirectory', 'utf-16.file', 'utf-8.file'}, + ) + + def test_is_dir(self): + self.assertEqual(MultiplexedPath(self.folder).is_dir(), True) + + def test_is_file(self): + self.assertEqual(MultiplexedPath(self.folder).is_file(), False) + + def test_open_file(self): + path = MultiplexedPath(self.folder) + with self.assertRaises(FileNotFoundError): + path.read_bytes() + with self.assertRaises(FileNotFoundError): + path.read_text() + with self.assertRaises(FileNotFoundError): + path.open() + + def test_join_path(self): + prefix = str(self.folder.parent) + path = MultiplexedPath(self.folder, self.data01) + self.assertEqual( + str(path.joinpath('binary.file'))[len(prefix) + 1 :], + os.path.join('namespacedata01', 'binary.file'), + ) + sub = path.joinpath('subdirectory') + assert isinstance(sub, MultiplexedPath) + assert 'namespacedata01' in str(sub) + assert 'data01' in str(sub) + self.assertEqual( + str(path.joinpath('imaginary'))[len(prefix) + 1 :], + os.path.join('namespacedata01', 'imaginary'), + ) + self.assertEqual(path.joinpath(), path) + + def test_join_path_compound(self): + path = MultiplexedPath(self.folder) + assert not path.joinpath('imaginary/foo.py').exists() + + def test_join_path_common_subdir(self): + prefix = str(self.data02.parent) + path = MultiplexedPath(self.data01, self.data02) + self.assertIsInstance(path.joinpath('subdirectory'), MultiplexedPath) + self.assertEqual( + str(path.joinpath('subdirectory', 'subsubdir'))[len(prefix) + 1 :], + os.path.join('data02', 'subdirectory', 'subsubdir'), + ) + + def test_repr(self): + self.assertEqual( + repr(MultiplexedPath(self.folder)), + f"MultiplexedPath('{self.folder}')", + ) + + def test_name(self): + self.assertEqual( + MultiplexedPath(self.folder).name, + os.path.basename(self.folder), + ) + + +class NamespaceReaderTest(util.DiskSetup, unittest.TestCase): + MODULE = 'namespacedata01' + + def test_init_error(self): + with self.assertRaises(ValueError): + NamespaceReader(['path1', 'path2']) + + def test_resource_path(self): + namespacedata01 = import_module('namespacedata01') + reader = NamespaceReader(namespacedata01.__spec__.submodule_search_locations) + + root = self.data.__path__[0] + self.assertEqual( + reader.resource_path('binary.file'), os.path.join(root, 'binary.file') + ) + self.assertEqual( + reader.resource_path('imaginary'), os.path.join(root, 'imaginary') + ) + + def test_files(self): + reader = NamespaceReader(self.data.__spec__.submodule_search_locations) + root = self.data.__path__[0] + self.assertIsInstance(reader.files(), MultiplexedPath) + self.assertEqual(repr(reader.files()), f"MultiplexedPath('{root}')") + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/resources/test_resource.py b/stdlib/test/test_importlib/resources/test_resource.py new file mode 100644 index 00000000..fcede14b --- /dev/null +++ b/stdlib/test/test_importlib/resources/test_resource.py @@ -0,0 +1,236 @@ +import unittest + +from . import util +from importlib import resources, import_module + + +class ResourceTests: + # Subclasses are expected to set the `data` attribute. + + def test_is_file_exists(self): + target = resources.files(self.data) / 'binary.file' + self.assertTrue(target.is_file()) + + def test_is_file_missing(self): + target = resources.files(self.data) / 'not-a-file' + self.assertFalse(target.is_file()) + + def test_is_dir(self): + target = resources.files(self.data) / 'subdirectory' + self.assertFalse(target.is_file()) + self.assertTrue(target.is_dir()) + + +class ResourceDiskTests(ResourceTests, util.DiskSetup, unittest.TestCase): + pass + + +class ResourceZipTests(ResourceTests, util.ZipSetup, unittest.TestCase): + pass + + +def names(traversable): + return {item.name for item in traversable.iterdir()} + + +class ResourceLoaderTests(util.DiskSetup, unittest.TestCase): + def test_resource_contents(self): + package = util.create_package( + file=self.data, path=self.data.__file__, contents=['A', 'B', 'C'] + ) + self.assertEqual(names(resources.files(package)), {'A', 'B', 'C'}) + + def test_is_file(self): + package = util.create_package( + file=self.data, + path=self.data.__file__, + contents=['A', 'B', 'C', 'D/E', 'D/F'], + ) + self.assertTrue(resources.files(package).joinpath('B').is_file()) + + def test_is_dir(self): + package = util.create_package( + file=self.data, + path=self.data.__file__, + contents=['A', 'B', 'C', 'D/E', 'D/F'], + ) + self.assertTrue(resources.files(package).joinpath('D').is_dir()) + + def test_resource_missing(self): + package = util.create_package( + file=self.data, + path=self.data.__file__, + contents=['A', 'B', 'C', 'D/E', 'D/F'], + ) + self.assertFalse(resources.files(package).joinpath('Z').is_file()) + + +class ResourceCornerCaseTests(util.DiskSetup, unittest.TestCase): + def test_package_has_no_reader_fallback(self): + """ + Test odd ball packages which: + # 1. Do not have a ResourceReader as a loader + # 2. Are not on the file system + # 3. Are not in a zip file + """ + module = util.create_package( + file=self.data, path=self.data.__file__, contents=['A', 'B', 'C'] + ) + # Give the module a dummy loader. + module.__loader__ = object() + # Give the module a dummy origin. + module.__file__ = '/path/which/shall/not/be/named' + module.__spec__.loader = module.__loader__ + module.__spec__.origin = module.__file__ + self.assertFalse(resources.files(module).joinpath('A').is_file()) + + +class ResourceFromZipsTest01(util.ZipSetup, unittest.TestCase): + def test_is_submodule_resource(self): + submodule = import_module('data01.subdirectory') + self.assertTrue(resources.files(submodule).joinpath('binary.file').is_file()) + + def test_read_submodule_resource_by_name(self): + self.assertTrue( + resources.files('data01.subdirectory').joinpath('binary.file').is_file() + ) + + def test_submodule_contents(self): + submodule = import_module('data01.subdirectory') + self.assertEqual( + names(resources.files(submodule)), {'__init__.py', 'binary.file'} + ) + + def test_submodule_contents_by_name(self): + self.assertEqual( + names(resources.files('data01.subdirectory')), + {'__init__.py', 'binary.file'}, + ) + + def test_as_file_directory(self): + with resources.as_file(resources.files('data01')) as data: + assert data.name == 'data01' + assert data.is_dir() + assert data.joinpath('subdirectory').is_dir() + assert len(list(data.iterdir())) + assert not data.parent.exists() + + +class ResourceFromZipsTest02(util.ZipSetup, unittest.TestCase): + MODULE = 'data02' + + def test_unrelated_contents(self): + """ + Test thata zip with two unrelated subpackages return + distinct resources. Ref python/importlib_resources#44. + """ + self.assertEqual( + names(resources.files('data02.one')), + {'__init__.py', 'resource1.txt'}, + ) + self.assertEqual( + names(resources.files('data02.two')), + {'__init__.py', 'resource2.txt'}, + ) + + +class DeletingZipsTest(util.ZipSetup, unittest.TestCase): + """Having accessed resources in a zip file should not keep an open + reference to the zip. + """ + + def test_iterdir_does_not_keep_open(self): + [item.name for item in resources.files('data01').iterdir()] + + def test_is_file_does_not_keep_open(self): + resources.files('data01').joinpath('binary.file').is_file() + + def test_is_file_failure_does_not_keep_open(self): + resources.files('data01').joinpath('not-present').is_file() + + @unittest.skip("Desired but not supported.") + def test_as_file_does_not_keep_open(self): # pragma: no cover + resources.as_file(resources.files('data01') / 'binary.file') + + def test_entered_path_does_not_keep_open(self): + """ + Mimic what certifi does on import to make its bundle + available for the process duration. + """ + resources.as_file(resources.files('data01') / 'binary.file').__enter__() + + def test_read_binary_does_not_keep_open(self): + resources.files('data01').joinpath('binary.file').read_bytes() + + def test_read_text_does_not_keep_open(self): + resources.files('data01').joinpath('utf-8.file').read_text(encoding='utf-8') + + +class ResourceFromNamespaceTests: + def test_is_submodule_resource(self): + self.assertTrue( + resources.files(import_module('namespacedata01')) + .joinpath('binary.file') + .is_file() + ) + + def test_read_submodule_resource_by_name(self): + self.assertTrue( + resources.files('namespacedata01').joinpath('binary.file').is_file() + ) + + def test_submodule_contents(self): + contents = names(resources.files(import_module('namespacedata01'))) + try: + contents.remove('__pycache__') + except KeyError: + pass + self.assertEqual( + contents, {'subdirectory', 'binary.file', 'utf-8.file', 'utf-16.file'} + ) + + def test_submodule_contents_by_name(self): + contents = names(resources.files('namespacedata01')) + try: + contents.remove('__pycache__') + except KeyError: + pass + self.assertEqual( + contents, {'subdirectory', 'binary.file', 'utf-8.file', 'utf-16.file'} + ) + + def test_submodule_sub_contents(self): + contents = names(resources.files(import_module('namespacedata01.subdirectory'))) + try: + contents.remove('__pycache__') + except KeyError: + pass + self.assertEqual(contents, {'binary.file'}) + + def test_submodule_sub_contents_by_name(self): + contents = names(resources.files('namespacedata01.subdirectory')) + try: + contents.remove('__pycache__') + except KeyError: + pass + self.assertEqual(contents, {'binary.file'}) + + +class ResourceFromNamespaceDiskTests( + util.DiskSetup, + ResourceFromNamespaceTests, + unittest.TestCase, +): + MODULE = 'namespacedata01' + + +class ResourceFromNamespaceZipTests( + util.ZipSetup, + ResourceFromNamespaceTests, + unittest.TestCase, +): + MODULE = 'namespacedata01' + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/resources/util.py b/stdlib/test/test_importlib/resources/util.py new file mode 100644 index 00000000..e2d995f5 --- /dev/null +++ b/stdlib/test/test_importlib/resources/util.py @@ -0,0 +1,206 @@ +import abc +import importlib +import io +import sys +import types +import pathlib +import contextlib + +from importlib.resources.abc import ResourceReader +from test.support import import_helper, os_helper +from . import zip as zip_ +from . import _path + + +from importlib.machinery import ModuleSpec + + +class Reader(ResourceReader): + def __init__(self, **kwargs): + vars(self).update(kwargs) + + def get_resource_reader(self, package): + return self + + def open_resource(self, path): + self._path = path + if isinstance(self.file, Exception): + raise self.file + return self.file + + def resource_path(self, path_): + self._path = path_ + if isinstance(self.path, Exception): + raise self.path + return self.path + + def is_resource(self, path_): + self._path = path_ + if isinstance(self.path, Exception): + raise self.path + + def part(entry): + return entry.split('/') + + return any( + len(parts) == 1 and parts[0] == path_ for parts in map(part, self._contents) + ) + + def contents(self): + if isinstance(self.path, Exception): + raise self.path + yield from self._contents + + +def create_package_from_loader(loader, is_package=True): + name = 'testingpackage' + module = types.ModuleType(name) + spec = ModuleSpec(name, loader, origin='does-not-exist', is_package=is_package) + module.__spec__ = spec + module.__loader__ = loader + return module + + +def create_package(file=None, path=None, is_package=True, contents=()): + return create_package_from_loader( + Reader(file=file, path=path, _contents=contents), + is_package, + ) + + +class CommonTestsBase(metaclass=abc.ABCMeta): + """ + Tests shared by test_open, test_path, and test_read. + """ + + @abc.abstractmethod + def execute(self, package, path): + """ + Call the pertinent legacy API function (e.g. open_text, path) + on package and path. + """ + + def test_package_name(self): + """ + Passing in the package name should succeed. + """ + self.execute(self.data.__name__, 'utf-8.file') + + def test_package_object(self): + """ + Passing in the package itself should succeed. + """ + self.execute(self.data, 'utf-8.file') + + def test_string_path(self): + """ + Passing in a string for the path should succeed. + """ + path = 'utf-8.file' + self.execute(self.data, path) + + def test_pathlib_path(self): + """ + Passing in a pathlib.PurePath object for the path should succeed. + """ + path = pathlib.PurePath('utf-8.file') + self.execute(self.data, path) + + def test_importing_module_as_side_effect(self): + """ + The anchor package can already be imported. + """ + del sys.modules[self.data.__name__] + self.execute(self.data.__name__, 'utf-8.file') + + def test_missing_path(self): + """ + Attempting to open or read or request the path for a + non-existent path should succeed if open_resource + can return a viable data stream. + """ + bytes_data = io.BytesIO(b'Hello, world!') + package = create_package(file=bytes_data, path=FileNotFoundError()) + self.execute(package, 'utf-8.file') + self.assertEqual(package.__loader__._path, 'utf-8.file') + + def test_extant_path(self): + # Attempting to open or read or request the path when the + # path does exist should still succeed. Does not assert + # anything about the result. + bytes_data = io.BytesIO(b'Hello, world!') + # any path that exists + path = __file__ + package = create_package(file=bytes_data, path=path) + self.execute(package, 'utf-8.file') + self.assertEqual(package.__loader__._path, 'utf-8.file') + + def test_useless_loader(self): + package = create_package(file=FileNotFoundError(), path=FileNotFoundError()) + with self.assertRaises(FileNotFoundError): + self.execute(package, 'utf-8.file') + + +fixtures = dict( + data01={ + '__init__.py': '', + 'binary.file': bytes(range(4)), + 'utf-16.file': '\ufeffHello, UTF-16 world!\n'.encode('utf-16-le'), + 'utf-8.file': 'Hello, UTF-8 world!\n'.encode('utf-8'), + 'subdirectory': { + '__init__.py': '', + 'binary.file': bytes(range(4, 8)), + }, + }, + data02={ + '__init__.py': '', + 'one': {'__init__.py': '', 'resource1.txt': 'one resource'}, + 'two': {'__init__.py': '', 'resource2.txt': 'two resource'}, + 'subdirectory': {'subsubdir': {'resource.txt': 'a resource'}}, + }, + namespacedata01={ + 'binary.file': bytes(range(4)), + 'utf-16.file': '\ufeffHello, UTF-16 world!\n'.encode('utf-16-le'), + 'utf-8.file': 'Hello, UTF-8 world!\n'.encode('utf-8'), + 'subdirectory': { + 'binary.file': bytes(range(12, 16)), + }, + }, +) + + +class ModuleSetup: + def setUp(self): + self.fixtures = contextlib.ExitStack() + self.addCleanup(self.fixtures.close) + + self.fixtures.enter_context(import_helper.isolated_modules()) + self.data = self.load_fixture(self.MODULE) + + def load_fixture(self, module): + self.tree_on_path({module: fixtures[module]}) + return importlib.import_module(module) + + +class ZipSetup(ModuleSetup): + MODULE = 'data01' + + def tree_on_path(self, spec): + temp_dir = self.fixtures.enter_context(os_helper.temp_dir()) + modules = pathlib.Path(temp_dir) / 'zipped modules.zip' + self.fixtures.enter_context( + import_helper.DirsOnSysPath(str(zip_.make_zip_file(spec, modules))) + ) + + +class DiskSetup(ModuleSetup): + MODULE = 'data01' + + def tree_on_path(self, spec): + temp_dir = self.fixtures.enter_context(os_helper.temp_dir()) + _path.build(spec, pathlib.Path(temp_dir)) + self.fixtures.enter_context(import_helper.DirsOnSysPath(temp_dir)) + + +class CommonTests(DiskSetup, CommonTestsBase): + pass diff --git a/stdlib/test/test_importlib/resources/zip.py b/stdlib/test/test_importlib/resources/zip.py new file mode 100755 index 00000000..fc453f02 --- /dev/null +++ b/stdlib/test/test_importlib/resources/zip.py @@ -0,0 +1,24 @@ +""" +Generate zip test data files. +""" + +import zipfile + + +def make_zip_file(tree, dst): + """ + Zip the files in tree into a new zipfile at dst. + """ + with zipfile.ZipFile(dst, 'w') as zf: + for name, contents in walk(tree): + zf.writestr(name, contents) + zipfile._path.CompleteDirs.inject(zf) + return dst + + +def walk(tree, prefix=''): + for name, contents in tree.items(): + if isinstance(contents, dict): + yield from walk(contents, prefix=f'{prefix}{name}/') + else: + yield f'{prefix}{name}', contents diff --git a/stdlib/test/test_importlib/source/__init__.py b/stdlib/test/test_importlib/source/__init__.py new file mode 100644 index 00000000..4b16ecc3 --- /dev/null +++ b/stdlib/test/test_importlib/source/__init__.py @@ -0,0 +1,5 @@ +import os +from test.support import load_package_tests + +def load_tests(*args): + return load_package_tests(os.path.dirname(__file__), *args) diff --git a/stdlib/test/test_importlib/source/__main__.py b/stdlib/test/test_importlib/source/__main__.py new file mode 100644 index 00000000..40a23a29 --- /dev/null +++ b/stdlib/test/test_importlib/source/__main__.py @@ -0,0 +1,4 @@ +from . import load_tests +import unittest + +unittest.main() diff --git a/stdlib/test/test_importlib/source/test_case_sensitivity.py b/stdlib/test/test_importlib/source/test_case_sensitivity.py new file mode 100644 index 00000000..e52829e6 --- /dev/null +++ b/stdlib/test/test_importlib/source/test_case_sensitivity.py @@ -0,0 +1,78 @@ +"""Test case-sensitivity (PEP 235).""" +import sys + +from test.test_importlib import util + +importlib = util.import_importlib('importlib') +machinery = util.import_importlib('importlib.machinery') + +import os +from test.support import os_helper +import unittest + + +@util.case_insensitive_tests +class CaseSensitivityTest(util.CASEOKTestBase): + + """PEP 235 dictates that on case-preserving, case-insensitive file systems + that imports are case-sensitive unless the PYTHONCASEOK environment + variable is set.""" + + name = 'MoDuLe' + assert name != name.lower() + + def finder(self, path): + return self.machinery.FileFinder(path, + (self.machinery.SourceFileLoader, + self.machinery.SOURCE_SUFFIXES), + (self.machinery.SourcelessFileLoader, + self.machinery.BYTECODE_SUFFIXES)) + + def sensitivity_test(self): + """Look for a module with matching and non-matching sensitivity.""" + sensitive_pkg = 'sensitive.{0}'.format(self.name) + insensitive_pkg = 'insensitive.{0}'.format(self.name.lower()) + context = util.create_modules(insensitive_pkg, sensitive_pkg) + with context as mapping: + sensitive_path = os.path.join(mapping['.root'], 'sensitive') + insensitive_path = os.path.join(mapping['.root'], 'insensitive') + sensitive_finder = self.finder(sensitive_path) + insensitive_finder = self.finder(insensitive_path) + return self.find(sensitive_finder), self.find(insensitive_finder) + + @unittest.skipIf(sys.flags.ignore_environment, 'ignore_environment flag was set') + def test_sensitive(self): + with os_helper.EnvironmentVarGuard() as env: + env.unset('PYTHONCASEOK') + self.caseok_env_changed(should_exist=False) + sensitive, insensitive = self.sensitivity_test() + self.assertIsNotNone(sensitive) + self.assertIn(self.name, sensitive.get_filename(self.name)) + self.assertIsNone(insensitive) + + @unittest.skipIf(sys.flags.ignore_environment, 'ignore_environment flag was set') + def test_insensitive(self): + with os_helper.EnvironmentVarGuard() as env: + env.set('PYTHONCASEOK', '1') + self.caseok_env_changed(should_exist=True) + sensitive, insensitive = self.sensitivity_test() + self.assertIsNotNone(sensitive) + self.assertIn(self.name, sensitive.get_filename(self.name)) + self.assertIsNotNone(insensitive) + self.assertIn(self.name, insensitive.get_filename(self.name)) + + +class CaseSensitivityTestPEP451(CaseSensitivityTest): + def find(self, finder): + found = finder.find_spec(self.name) + return found.loader if found is not None else found + + +(Frozen_CaseSensitivityTestPEP451, + Source_CaseSensitivityTestPEP451 + ) = util.test_both(CaseSensitivityTestPEP451, importlib=importlib, + machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/source/test_file_loader.py b/stdlib/test/test_importlib/source/test_file_loader.py new file mode 100644 index 00000000..f35adec1 --- /dev/null +++ b/stdlib/test/test_importlib/source/test_file_loader.py @@ -0,0 +1,795 @@ +from test.test_importlib import abc, util + +importlib = util.import_importlib('importlib') +importlib_abc = util.import_importlib('importlib.abc') +machinery = util.import_importlib('importlib.machinery') +importlib_util = util.import_importlib('importlib.util') + +import errno +import marshal +import os +import py_compile +import shutil +import stat +import sys +import types +import unittest +import warnings + +from test.support.import_helper import make_legacy_pyc, unload + +from test.test_py_compile import without_source_date_epoch +from test.test_py_compile import SourceDateEpochTestMeta + + +class SimpleTest(abc.LoaderTests): + + """Should have no issue importing a source module [basic]. And if there is + a syntax error, it should raise a SyntaxError [syntax error]. + + """ + + def setUp(self): + self.name = 'spam' + self.filepath = os.path.join('ham', self.name + '.py') + self.loader = self.machinery.SourceFileLoader(self.name, self.filepath) + + def test_load_module_API(self): + class Tester(self.abc.FileLoader): + def get_source(self, _): return 'attr = 42' + def is_package(self, _): return False + + loader = Tester('blah', 'blah.py') + self.addCleanup(unload, 'blah') + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module() # Should not raise an exception. + + def test_get_filename_API(self): + # If fullname is not set then assume self.path is desired. + class Tester(self.abc.FileLoader): + def get_code(self, _): pass + def get_source(self, _): pass + def is_package(self, _): pass + + path = 'some_path' + name = 'some_name' + loader = Tester(name, path) + self.assertEqual(path, loader.get_filename(name)) + self.assertEqual(path, loader.get_filename()) + self.assertEqual(path, loader.get_filename(None)) + with self.assertRaises(ImportError): + loader.get_filename(name + 'XXX') + + def test_equality(self): + other = self.machinery.SourceFileLoader(self.name, self.filepath) + self.assertEqual(self.loader, other) + + def test_inequality(self): + other = self.machinery.SourceFileLoader('_' + self.name, self.filepath) + self.assertNotEqual(self.loader, other) + + # [basic] + def test_module(self): + with util.create_modules('_temp') as mapping: + loader = self.machinery.SourceFileLoader('_temp', mapping['_temp']) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module('_temp') + self.assertIn('_temp', sys.modules) + check = {'__name__': '_temp', '__file__': mapping['_temp'], + '__package__': ''} + for attr, value in check.items(): + self.assertEqual(getattr(module, attr), value) + + def test_package(self): + with util.create_modules('_pkg.__init__') as mapping: + loader = self.machinery.SourceFileLoader('_pkg', + mapping['_pkg.__init__']) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module('_pkg') + self.assertIn('_pkg', sys.modules) + check = {'__name__': '_pkg', '__file__': mapping['_pkg.__init__'], + '__path__': [os.path.dirname(mapping['_pkg.__init__'])], + '__package__': '_pkg'} + for attr, value in check.items(): + self.assertEqual(getattr(module, attr), value) + + + def test_lacking_parent(self): + with util.create_modules('_pkg.__init__', '_pkg.mod')as mapping: + loader = self.machinery.SourceFileLoader('_pkg.mod', + mapping['_pkg.mod']) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module('_pkg.mod') + self.assertIn('_pkg.mod', sys.modules) + check = {'__name__': '_pkg.mod', '__file__': mapping['_pkg.mod'], + '__package__': '_pkg'} + for attr, value in check.items(): + self.assertEqual(getattr(module, attr), value) + + def fake_mtime(self, fxn): + """Fake mtime to always be higher than expected.""" + return lambda name: fxn(name) + 1 + + def test_module_reuse(self): + with util.create_modules('_temp') as mapping: + loader = self.machinery.SourceFileLoader('_temp', mapping['_temp']) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module('_temp') + module_id = id(module) + module_dict_id = id(module.__dict__) + with open(mapping['_temp'], 'w', encoding='utf-8') as file: + file.write("testing_var = 42\n") + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module('_temp') + self.assertIn('testing_var', module.__dict__, + "'testing_var' not in " + "{0}".format(list(module.__dict__.keys()))) + self.assertEqual(module, sys.modules['_temp']) + self.assertEqual(id(module), module_id) + self.assertEqual(id(module.__dict__), module_dict_id) + + def test_state_after_failure(self): + # A failed reload should leave the original module intact. + attributes = ('__file__', '__path__', '__package__') + value = '' + name = '_temp' + with util.create_modules(name) as mapping: + orig_module = types.ModuleType(name) + for attr in attributes: + setattr(orig_module, attr, value) + with open(mapping[name], 'w', encoding='utf-8') as file: + file.write('+++ bad syntax +++') + loader = self.machinery.SourceFileLoader('_temp', mapping['_temp']) + with self.assertRaises(SyntaxError): + loader.exec_module(orig_module) + for attr in attributes: + self.assertEqual(getattr(orig_module, attr), value) + with self.assertRaises(SyntaxError): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + loader.load_module(name) + for attr in attributes: + self.assertEqual(getattr(orig_module, attr), value) + + # [syntax error] + def test_bad_syntax(self): + with util.create_modules('_temp') as mapping: + with open(mapping['_temp'], 'w', encoding='utf-8') as file: + file.write('=') + loader = self.machinery.SourceFileLoader('_temp', mapping['_temp']) + with self.assertRaises(SyntaxError): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + loader.load_module('_temp') + self.assertNotIn('_temp', sys.modules) + + def test_file_from_empty_string_dir(self): + # Loading a module found from an empty string entry on sys.path should + # not only work, but keep all attributes relative. + file_path = '_temp.py' + with open(file_path, 'w', encoding='utf-8') as file: + file.write("# test file for importlib") + try: + with util.uncache('_temp'): + loader = self.machinery.SourceFileLoader('_temp', file_path) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + mod = loader.load_module('_temp') + self.assertEqual(file_path, mod.__file__) + self.assertEqual(self.util.cache_from_source(file_path), + mod.__cached__) + finally: + os.unlink(file_path) + pycache = os.path.dirname(self.util.cache_from_source(file_path)) + if os.path.exists(pycache): + shutil.rmtree(pycache) + + @util.writes_bytecode_files + def test_timestamp_overflow(self): + # When a modification timestamp is larger than 2**32, it should be + # truncated rather than raise an OverflowError. + with util.create_modules('_temp') as mapping: + source = mapping['_temp'] + compiled = self.util.cache_from_source(source) + with open(source, 'w', encoding='utf-8') as f: + f.write("x = 5") + try: + os.utime(source, (2 ** 33 - 5, 2 ** 33 - 5)) + except OverflowError: + self.skipTest("cannot set modification time to large integer") + except OSError as e: + if e.errno != getattr(errno, 'EOVERFLOW', None): + raise + self.skipTest("cannot set modification time to large integer ({})".format(e)) + loader = self.machinery.SourceFileLoader('_temp', mapping['_temp']) + # PEP 451 + module = types.ModuleType('_temp') + module.__spec__ = self.util.spec_from_loader('_temp', loader) + loader.exec_module(module) + self.assertEqual(module.x, 5) + self.assertTrue(os.path.exists(compiled)) + os.unlink(compiled) + # PEP 302 + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + mod = loader.load_module('_temp') + # Sanity checks. + self.assertEqual(mod.__cached__, compiled) + self.assertEqual(mod.x, 5) + # The pyc file was created. + self.assertTrue(os.path.exists(compiled)) + + def test_unloadable(self): + loader = self.machinery.SourceFileLoader('good name', {}) + module = types.ModuleType('bad name') + module.__spec__ = self.machinery.ModuleSpec('bad name', loader) + with self.assertRaises(ImportError): + loader.exec_module(module) + with self.assertRaises(ImportError): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + loader.load_module('bad name') + + @util.writes_bytecode_files + def test_checked_hash_based_pyc(self): + with util.create_modules('_temp') as mapping: + source = mapping['_temp'] + pyc = self.util.cache_from_source(source) + with open(source, 'wb') as fp: + fp.write(b'state = "old"') + os.utime(source, (50, 50)) + py_compile.compile( + source, + invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH, + ) + loader = self.machinery.SourceFileLoader('_temp', source) + mod = types.ModuleType('_temp') + mod.__spec__ = self.util.spec_from_loader('_temp', loader) + loader.exec_module(mod) + self.assertEqual(mod.state, 'old') + # Write a new source with the same mtime and size as before. + with open(source, 'wb') as fp: + fp.write(b'state = "new"') + os.utime(source, (50, 50)) + loader.exec_module(mod) + self.assertEqual(mod.state, 'new') + with open(pyc, 'rb') as fp: + data = fp.read() + self.assertEqual(int.from_bytes(data[4:8], 'little'), 0b11) + self.assertEqual( + self.util.source_hash(b'state = "new"'), + data[8:16], + ) + + @util.writes_bytecode_files + def test_overridden_checked_hash_based_pyc(self): + with util.create_modules('_temp') as mapping, \ + unittest.mock.patch('_imp.check_hash_based_pycs', 'never'): + source = mapping['_temp'] + pyc = self.util.cache_from_source(source) + with open(source, 'wb') as fp: + fp.write(b'state = "old"') + os.utime(source, (50, 50)) + py_compile.compile( + source, + invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH, + ) + loader = self.machinery.SourceFileLoader('_temp', source) + mod = types.ModuleType('_temp') + mod.__spec__ = self.util.spec_from_loader('_temp', loader) + loader.exec_module(mod) + self.assertEqual(mod.state, 'old') + # Write a new source with the same mtime and size as before. + with open(source, 'wb') as fp: + fp.write(b'state = "new"') + os.utime(source, (50, 50)) + loader.exec_module(mod) + self.assertEqual(mod.state, 'old') + + @util.writes_bytecode_files + def test_unchecked_hash_based_pyc(self): + with util.create_modules('_temp') as mapping: + source = mapping['_temp'] + pyc = self.util.cache_from_source(source) + with open(source, 'wb') as fp: + fp.write(b'state = "old"') + os.utime(source, (50, 50)) + py_compile.compile( + source, + invalidation_mode=py_compile.PycInvalidationMode.UNCHECKED_HASH, + ) + loader = self.machinery.SourceFileLoader('_temp', source) + mod = types.ModuleType('_temp') + mod.__spec__ = self.util.spec_from_loader('_temp', loader) + loader.exec_module(mod) + self.assertEqual(mod.state, 'old') + # Update the source file, which should be ignored. + with open(source, 'wb') as fp: + fp.write(b'state = "new"') + loader.exec_module(mod) + self.assertEqual(mod.state, 'old') + with open(pyc, 'rb') as fp: + data = fp.read() + self.assertEqual(int.from_bytes(data[4:8], 'little'), 0b1) + self.assertEqual( + self.util.source_hash(b'state = "old"'), + data[8:16], + ) + + @util.writes_bytecode_files + def test_overridden_unchecked_hash_based_pyc(self): + with util.create_modules('_temp') as mapping, \ + unittest.mock.patch('_imp.check_hash_based_pycs', 'always'): + source = mapping['_temp'] + pyc = self.util.cache_from_source(source) + with open(source, 'wb') as fp: + fp.write(b'state = "old"') + os.utime(source, (50, 50)) + py_compile.compile( + source, + invalidation_mode=py_compile.PycInvalidationMode.UNCHECKED_HASH, + ) + loader = self.machinery.SourceFileLoader('_temp', source) + mod = types.ModuleType('_temp') + mod.__spec__ = self.util.spec_from_loader('_temp', loader) + loader.exec_module(mod) + self.assertEqual(mod.state, 'old') + # Update the source file, which should be ignored. + with open(source, 'wb') as fp: + fp.write(b'state = "new"') + loader.exec_module(mod) + self.assertEqual(mod.state, 'new') + with open(pyc, 'rb') as fp: + data = fp.read() + self.assertEqual(int.from_bytes(data[4:8], 'little'), 0b1) + self.assertEqual( + self.util.source_hash(b'state = "new"'), + data[8:16], + ) + + +(Frozen_SimpleTest, + Source_SimpleTest + ) = util.test_both(SimpleTest, importlib=importlib, machinery=machinery, + abc=importlib_abc, util=importlib_util) + + +class SourceDateEpochTestMeta(SourceDateEpochTestMeta, + type(Source_SimpleTest)): + pass + + +class SourceDateEpoch_SimpleTest(Source_SimpleTest, + metaclass=SourceDateEpochTestMeta, + source_date_epoch=True): + pass + + +class BadBytecodeTest: + + def import_(self, file, module_name): + raise NotImplementedError + + def manipulate_bytecode(self, + name, mapping, manipulator, *, + del_source=False, + invalidation_mode=py_compile.PycInvalidationMode.TIMESTAMP): + """Manipulate the bytecode of a module by passing it into a callable + that returns what to use as the new bytecode.""" + try: + del sys.modules['_temp'] + except KeyError: + pass + py_compile.compile(mapping[name], invalidation_mode=invalidation_mode) + if not del_source: + bytecode_path = self.util.cache_from_source(mapping[name]) + else: + os.unlink(mapping[name]) + bytecode_path = make_legacy_pyc(mapping[name]) + if manipulator: + with open(bytecode_path, 'rb') as file: + bc = file.read() + new_bc = manipulator(bc) + with open(bytecode_path, 'wb') as file: + if new_bc is not None: + file.write(new_bc) + return bytecode_path + + def _test_empty_file(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: b'', + del_source=del_source) + test('_temp', mapping, bc_path) + + @util.writes_bytecode_files + def _test_partial_magic(self, test, *, del_source=False): + # When their are less than 4 bytes to a .pyc, regenerate it if + # possible, else raise ImportError. + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:3], + del_source=del_source) + test('_temp', mapping, bc_path) + + def _test_magic_only(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:4], + del_source=del_source) + test('_temp', mapping, bc_path) + + def _test_partial_flags(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:7], + del_source=del_source) + test('_temp', mapping, bc_path) + + def _test_partial_hash(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode( + '_temp', + mapping, + lambda bc: bc[:13], + del_source=del_source, + invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH, + ) + test('_temp', mapping, bc_path) + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode( + '_temp', + mapping, + lambda bc: bc[:13], + del_source=del_source, + invalidation_mode=py_compile.PycInvalidationMode.UNCHECKED_HASH, + ) + test('_temp', mapping, bc_path) + + def _test_partial_timestamp(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:11], + del_source=del_source) + test('_temp', mapping, bc_path) + + def _test_partial_size(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:15], + del_source=del_source) + test('_temp', mapping, bc_path) + + def _test_no_marshal(self, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:16], + del_source=del_source) + file_path = mapping['_temp'] if not del_source else bc_path + with self.assertRaises(EOFError): + self.import_(file_path, '_temp') + + def _test_non_code_marshal(self, *, del_source=False): + with util.create_modules('_temp') as mapping: + bytecode_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:16] + marshal.dumps(b'abcd'), + del_source=del_source) + file_path = mapping['_temp'] if not del_source else bytecode_path + with self.assertRaises(ImportError) as cm: + self.import_(file_path, '_temp') + self.assertEqual(cm.exception.name, '_temp') + self.assertEqual(cm.exception.path, bytecode_path) + + def _test_bad_marshal(self, *, del_source=False): + with util.create_modules('_temp') as mapping: + bytecode_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: bc[:16] + b'', + del_source=del_source) + file_path = mapping['_temp'] if not del_source else bytecode_path + with self.assertRaises(EOFError): + self.import_(file_path, '_temp') + + def _test_bad_magic(self, test, *, del_source=False): + with util.create_modules('_temp') as mapping: + bc_path = self.manipulate_bytecode('_temp', mapping, + lambda bc: b'\x00\x00\x00\x00' + bc[4:]) + test('_temp', mapping, bc_path) + + +class BadBytecodeTestPEP451(BadBytecodeTest): + + def import_(self, file, module_name): + loader = self.loader(module_name, file) + module = types.ModuleType(module_name) + module.__spec__ = self.util.spec_from_loader(module_name, loader) + loader.exec_module(module) + + +class BadBytecodeTestPEP302(BadBytecodeTest): + + def import_(self, file, module_name): + loader = self.loader(module_name, file) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = loader.load_module(module_name) + self.assertIn(module_name, sys.modules) + + +class SourceLoaderBadBytecodeTest: + + @classmethod + def setUpClass(cls): + cls.loader = cls.machinery.SourceFileLoader + + @util.writes_bytecode_files + def test_empty_file(self): + # When a .pyc is empty, regenerate it if possible, else raise + # ImportError. + def test(name, mapping, bytecode_path): + self.import_(mapping[name], name) + with open(bytecode_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_empty_file(test) + + def test_partial_magic(self): + def test(name, mapping, bytecode_path): + self.import_(mapping[name], name) + with open(bytecode_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_partial_magic(test) + + @util.writes_bytecode_files + def test_magic_only(self): + # When there is only the magic number, regenerate the .pyc if possible, + # else raise EOFError. + def test(name, mapping, bytecode_path): + self.import_(mapping[name], name) + with open(bytecode_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_magic_only(test) + + @util.writes_bytecode_files + def test_bad_magic(self): + # When the magic number is different, the bytecode should be + # regenerated. + def test(name, mapping, bytecode_path): + self.import_(mapping[name], name) + with open(bytecode_path, 'rb') as bytecode_file: + self.assertEqual(bytecode_file.read(4), + self.util.MAGIC_NUMBER) + + self._test_bad_magic(test) + + @util.writes_bytecode_files + def test_partial_timestamp(self): + # When the timestamp is partial, regenerate the .pyc, else + # raise EOFError. + def test(name, mapping, bc_path): + self.import_(mapping[name], name) + with open(bc_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_partial_timestamp(test) + + @util.writes_bytecode_files + def test_partial_flags(self): + # When the flags is partial, regenerate the .pyc, else raise EOFError. + def test(name, mapping, bc_path): + self.import_(mapping[name], name) + with open(bc_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_partial_flags(test) + + @util.writes_bytecode_files + def test_partial_hash(self): + # When the hash is partial, regenerate the .pyc, else raise EOFError. + def test(name, mapping, bc_path): + self.import_(mapping[name], name) + with open(bc_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_partial_hash(test) + + @util.writes_bytecode_files + def test_partial_size(self): + # When the size is partial, regenerate the .pyc, else + # raise EOFError. + def test(name, mapping, bc_path): + self.import_(mapping[name], name) + with open(bc_path, 'rb') as file: + self.assertGreater(len(file.read()), 16) + + self._test_partial_size(test) + + @util.writes_bytecode_files + def test_no_marshal(self): + # When there is only the magic number and timestamp, raise EOFError. + self._test_no_marshal() + + @util.writes_bytecode_files + def test_non_code_marshal(self): + self._test_non_code_marshal() + # XXX ImportError when sourceless + + # [bad marshal] + @util.writes_bytecode_files + def test_bad_marshal(self): + # Bad marshal data should raise a ValueError. + self._test_bad_marshal() + + # [bad timestamp] + @util.writes_bytecode_files + @without_source_date_epoch + def test_old_timestamp(self): + # When the timestamp is older than the source, bytecode should be + # regenerated. + zeros = b'\x00\x00\x00\x00' + with util.create_modules('_temp') as mapping: + py_compile.compile(mapping['_temp']) + bytecode_path = self.util.cache_from_source(mapping['_temp']) + with open(bytecode_path, 'r+b') as bytecode_file: + bytecode_file.seek(8) + bytecode_file.write(zeros) + self.import_(mapping['_temp'], '_temp') + source_mtime = os.path.getmtime(mapping['_temp']) + source_timestamp = self.importlib._pack_uint32(source_mtime) + with open(bytecode_path, 'rb') as bytecode_file: + bytecode_file.seek(8) + self.assertEqual(bytecode_file.read(4), source_timestamp) + + # [bytecode read-only] + @util.writes_bytecode_files + def test_read_only_bytecode(self): + # When bytecode is read-only but should be rewritten, fail silently. + with util.create_modules('_temp') as mapping: + # Create bytecode that will need to be re-created. + py_compile.compile(mapping['_temp']) + bytecode_path = self.util.cache_from_source(mapping['_temp']) + with open(bytecode_path, 'r+b') as bytecode_file: + bytecode_file.seek(0) + bytecode_file.write(b'\x00\x00\x00\x00') + # Make the bytecode read-only. + os.chmod(bytecode_path, + stat.S_IRUSR | stat.S_IRGRP | stat.S_IROTH) + try: + # Should not raise OSError! + self.import_(mapping['_temp'], '_temp') + finally: + # Make writable for eventual clean-up. + os.chmod(bytecode_path, stat.S_IWUSR) + + +class SourceLoaderBadBytecodeTestPEP451( + SourceLoaderBadBytecodeTest, BadBytecodeTestPEP451): + pass + + +(Frozen_SourceBadBytecodePEP451, + Source_SourceBadBytecodePEP451 + ) = util.test_both(SourceLoaderBadBytecodeTestPEP451, importlib=importlib, + machinery=machinery, abc=importlib_abc, + util=importlib_util) + + +class SourceLoaderBadBytecodeTestPEP302( + SourceLoaderBadBytecodeTest, BadBytecodeTestPEP302): + pass + + +(Frozen_SourceBadBytecodePEP302, + Source_SourceBadBytecodePEP302 + ) = util.test_both(SourceLoaderBadBytecodeTestPEP302, importlib=importlib, + machinery=machinery, abc=importlib_abc, + util=importlib_util) + + +class SourcelessLoaderBadBytecodeTest: + + @classmethod + def setUpClass(cls): + cls.loader = cls.machinery.SourcelessFileLoader + + def test_empty_file(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(ImportError) as cm: + self.import_(bytecode_path, name) + self.assertEqual(cm.exception.name, name) + self.assertEqual(cm.exception.path, bytecode_path) + + self._test_empty_file(test, del_source=True) + + def test_partial_magic(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(ImportError) as cm: + self.import_(bytecode_path, name) + self.assertEqual(cm.exception.name, name) + self.assertEqual(cm.exception.path, bytecode_path) + self._test_partial_magic(test, del_source=True) + + def test_magic_only(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(EOFError): + self.import_(bytecode_path, name) + + self._test_magic_only(test, del_source=True) + + def test_bad_magic(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(ImportError) as cm: + self.import_(bytecode_path, name) + self.assertEqual(cm.exception.name, name) + self.assertEqual(cm.exception.path, bytecode_path) + + self._test_bad_magic(test, del_source=True) + + def test_partial_timestamp(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(EOFError): + self.import_(bytecode_path, name) + + self._test_partial_timestamp(test, del_source=True) + + def test_partial_flags(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(EOFError): + self.import_(bytecode_path, name) + + self._test_partial_flags(test, del_source=True) + + def test_partial_hash(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(EOFError): + self.import_(bytecode_path, name) + + self._test_partial_hash(test, del_source=True) + + def test_partial_size(self): + def test(name, mapping, bytecode_path): + with self.assertRaises(EOFError): + self.import_(bytecode_path, name) + + self._test_partial_size(test, del_source=True) + + def test_no_marshal(self): + self._test_no_marshal(del_source=True) + + def test_non_code_marshal(self): + self._test_non_code_marshal(del_source=True) + + +class SourcelessLoaderBadBytecodeTestPEP451(SourcelessLoaderBadBytecodeTest, + BadBytecodeTestPEP451): + pass + + +(Frozen_SourcelessBadBytecodePEP451, + Source_SourcelessBadBytecodePEP451 + ) = util.test_both(SourcelessLoaderBadBytecodeTestPEP451, importlib=importlib, + machinery=machinery, abc=importlib_abc, + util=importlib_util) + + +class SourcelessLoaderBadBytecodeTestPEP302(SourcelessLoaderBadBytecodeTest, + BadBytecodeTestPEP302): + pass + + +(Frozen_SourcelessBadBytecodePEP302, + Source_SourcelessBadBytecodePEP302 + ) = util.test_both(SourcelessLoaderBadBytecodeTestPEP302, importlib=importlib, + machinery=machinery, abc=importlib_abc, + util=importlib_util) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/source/test_finder.py b/stdlib/test/test_importlib/source/test_finder.py new file mode 100644 index 00000000..4de736a6 --- /dev/null +++ b/stdlib/test/test_importlib/source/test_finder.py @@ -0,0 +1,212 @@ +from test.test_importlib import abc, util + +machinery = util.import_importlib('importlib.machinery') + +import errno +import os +import py_compile +import stat +import sys +import tempfile +from test.support.import_helper import make_legacy_pyc +import unittest + + +class FinderTests(abc.FinderTests): + + """For a top-level module, it should just be found directly in the + directory being searched. This is true for a directory with source + [top-level source], bytecode [top-level bc], or both [top-level both]. + There is also the possibility that it is a package [top-level package], in + which case there will be a directory with the module name and an + __init__.py file. If there is a directory without an __init__.py an + ImportWarning is returned [empty dir]. + + For sub-modules and sub-packages, the same happens as above but only use + the tail end of the name [sub module] [sub package] [sub empty]. + + When there is a conflict between a package and module having the same name + in the same directory, the package wins out [package over module]. This is + so that imports of modules within the package can occur rather than trigger + an import error. + + When there is a package and module with the same name, always pick the + package over the module [package over module]. This is so that imports from + the package have the possibility of succeeding. + + """ + + def get_finder(self, root): + loader_details = [(self.machinery.SourceFileLoader, + self.machinery.SOURCE_SUFFIXES), + (self.machinery.SourcelessFileLoader, + self.machinery.BYTECODE_SUFFIXES)] + return self.machinery.FileFinder(root, *loader_details) + + def import_(self, root, module): + finder = self.get_finder(root) + return self._find(finder, module, loader_only=True) + + def run_test(self, test, create=None, *, compile_=None, unlink=None): + """Test the finding of 'test' with the creation of modules listed in + 'create'. + + Any names listed in 'compile_' are byte-compiled. Modules + listed in 'unlink' have their source files deleted. + + """ + if create is None: + create = {test} + with util.create_modules(*create) as mapping: + if compile_: + for name in compile_: + py_compile.compile(mapping[name]) + if unlink: + for name in unlink: + os.unlink(mapping[name]) + try: + make_legacy_pyc(mapping[name]) + except OSError as error: + # Some tests do not set compile_=True so the source + # module will not get compiled and there will be no + # PEP 3147 pyc file to rename. + if error.errno != errno.ENOENT: + raise + loader = self.import_(mapping['.root'], test) + self.assertHasAttr(loader, 'load_module') + return loader + + def test_module(self): + # [top-level source] + self.run_test('top_level') + # [top-level bc] + self.run_test('top_level', compile_={'top_level'}, + unlink={'top_level'}) + # [top-level both] + self.run_test('top_level', compile_={'top_level'}) + + # [top-level package] + def test_package(self): + # Source. + self.run_test('pkg', {'pkg.__init__'}) + # Bytecode. + self.run_test('pkg', {'pkg.__init__'}, compile_={'pkg.__init__'}, + unlink={'pkg.__init__'}) + # Both. + self.run_test('pkg', {'pkg.__init__'}, compile_={'pkg.__init__'}) + + # [sub module] + def test_module_in_package(self): + with util.create_modules('pkg.__init__', 'pkg.sub') as mapping: + pkg_dir = os.path.dirname(mapping['pkg.__init__']) + loader = self.import_(pkg_dir, 'pkg.sub') + self.assertHasAttr(loader, 'load_module') + + # [sub package] + def test_package_in_package(self): + context = util.create_modules('pkg.__init__', 'pkg.sub.__init__') + with context as mapping: + pkg_dir = os.path.dirname(mapping['pkg.__init__']) + loader = self.import_(pkg_dir, 'pkg.sub') + self.assertHasAttr(loader, 'load_module') + + # [package over modules] + def test_package_over_module(self): + name = '_temp' + loader = self.run_test(name, {'{0}.__init__'.format(name), name}) + self.assertIn('__init__', loader.get_filename(name)) + + def test_failure(self): + with util.create_modules('blah') as mapping: + nothing = self.import_(mapping['.root'], 'sdfsadsadf') + self.assertEqual(nothing, self.NOT_FOUND) + + def test_empty_string_for_dir(self): + # The empty string from sys.path means to search in the cwd. + finder = self.machinery.FileFinder('', (self.machinery.SourceFileLoader, + self.machinery.SOURCE_SUFFIXES)) + with open('mod.py', 'w', encoding='utf-8') as file: + file.write("# test file for importlib") + try: + loader = self._find(finder, 'mod', loader_only=True) + self.assertHasAttr(loader, 'load_module') + finally: + os.unlink('mod.py') + + def test_invalidate_caches(self): + # invalidate_caches() should reset the mtime. + finder = self.machinery.FileFinder('', (self.machinery.SourceFileLoader, + self.machinery.SOURCE_SUFFIXES)) + finder._path_mtime = 42 + finder.invalidate_caches() + self.assertEqual(finder._path_mtime, -1) + + # Regression test for http://bugs.python.org/issue14846 + def test_dir_removal_handling(self): + mod = 'mod' + with util.create_modules(mod) as mapping: + finder = self.get_finder(mapping['.root']) + found = self._find(finder, 'mod', loader_only=True) + self.assertIsNotNone(found) + found = self._find(finder, 'mod', loader_only=True) + self.assertEqual(found, self.NOT_FOUND) + + @unittest.skipUnless(sys.platform != 'win32', + 'os.chmod() does not support the needed arguments under Windows') + def test_no_read_directory(self): + # Issue #16730 + tempdir = tempfile.TemporaryDirectory() + self.enterContext(tempdir) + # Since we muck with the permissions, we want to set them back to + # their original values to make sure the directory can be properly + # cleaned up. + original_mode = os.stat(tempdir.name).st_mode + self.addCleanup(os.chmod, tempdir.name, original_mode) + os.chmod(tempdir.name, stat.S_IWUSR | stat.S_IXUSR) + finder = self.get_finder(tempdir.name) + found = self._find(finder, 'doesnotexist') + self.assertEqual(found, self.NOT_FOUND) + + def test_ignore_file(self): + # If a directory got changed to a file from underneath us, then don't + # worry about looking for submodules. + with tempfile.NamedTemporaryFile() as file_obj: + finder = self.get_finder(file_obj.name) + found = self._find(finder, 'doesnotexist') + self.assertEqual(found, self.NOT_FOUND) + + +class FinderTestsPEP451(FinderTests): + + NOT_FOUND = None + + def _find(self, finder, name, loader_only=False): + spec = finder.find_spec(name) + return spec.loader if spec is not None else spec + + +(Frozen_FinderTestsPEP451, + Source_FinderTestsPEP451 + ) = util.test_both(FinderTestsPEP451, machinery=machinery) + + +class FinderTestsPEP420(FinderTests): + + NOT_FOUND = (None, []) + + def _find(self, finder, name, loader_only=False): + spec = finder.find_spec(name) + if spec is None: + return self.NOT_FOUND + if loader_only: + return spec.loader + return spec.loader, spec.submodule_search_locations + + +(Frozen_FinderTestsPEP420, + Source_FinderTestsPEP420 + ) = util.test_both(FinderTestsPEP420, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/source/test_path_hook.py b/stdlib/test/test_importlib/source/test_path_hook.py new file mode 100644 index 00000000..6e1c23e6 --- /dev/null +++ b/stdlib/test/test_importlib/source/test_path_hook.py @@ -0,0 +1,32 @@ +from test.test_importlib import util + +machinery = util.import_importlib('importlib.machinery') + +import unittest + + +class PathHookTest: + + """Test the path hook for source.""" + + def path_hook(self): + return self.machinery.FileFinder.path_hook((self.machinery.SourceFileLoader, + self.machinery.SOURCE_SUFFIXES)) + + def test_success(self): + with util.create_modules('dummy') as mapping: + self.assertHasAttr(self.path_hook()(mapping['.root']), + 'find_spec') + + def test_empty_string(self): + # The empty string represents the cwd. + self.assertHasAttr(self.path_hook()(''), 'find_spec') + + +(Frozen_PathHookTest, + Source_PathHooktest + ) = util.test_both(PathHookTest, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/source/test_source_encoding.py b/stdlib/test/test_importlib/source/test_source_encoding.py new file mode 100644 index 00000000..c09c9aa1 --- /dev/null +++ b/stdlib/test/test_importlib/source/test_source_encoding.py @@ -0,0 +1,175 @@ +from test.test_importlib import util + +machinery = util.import_importlib('importlib.machinery') + +import codecs +import importlib.util +import re +import types +# Because sys.path gets essentially blanked, need to have unicodedata already +# imported for the parser to use. +import unicodedata +import unittest +import warnings + + +CODING_RE = re.compile(r'^[ \t\f]*#.*?coding[:=][ \t]*([-\w.]+)', re.ASCII) + + +class EncodingTest: + + """PEP 3120 makes UTF-8 the default encoding for source code + [default encoding]. + + PEP 263 specifies how that can change on a per-file basis. Either the first + or second line can contain the encoding line [encoding first line] + [encoding second line]. If the file has the BOM marker it is considered UTF-8 + implicitly [BOM]. If any encoding is specified it must be UTF-8, else it is + an error [BOM and utf-8][BOM conflict]. + + """ + + variable = '\u00fc' + character = '\u00c9' + source_line = "{0} = '{1}'\n".format(variable, character) + module_name = '_temp' + + def run_test(self, source): + with util.create_modules(self.module_name) as mapping: + with open(mapping[self.module_name], 'wb') as file: + file.write(source) + loader = self.machinery.SourceFileLoader(self.module_name, + mapping[self.module_name]) + return self.load(loader) + + def create_source(self, encoding): + encoding_line = "# coding={0}".format(encoding) + assert CODING_RE.match(encoding_line) + source_lines = [encoding_line.encode('utf-8')] + source_lines.append(self.source_line.encode(encoding)) + return b'\n'.join(source_lines) + + def test_non_obvious_encoding(self): + # Make sure that an encoding that has never been a standard one for + # Python works. + encoding_line = "# coding=koi8-r" + assert CODING_RE.match(encoding_line) + source = "{0}\na=42\n".format(encoding_line).encode("koi8-r") + self.run_test(source) + + # [default encoding] + def test_default_encoding(self): + self.run_test(self.source_line.encode('utf-8')) + + # [encoding first line] + def test_encoding_on_first_line(self): + encoding = 'Latin-1' + source = self.create_source(encoding) + self.run_test(source) + + # [encoding second line] + def test_encoding_on_second_line(self): + source = b"#/usr/bin/python\n" + self.create_source('Latin-1') + self.run_test(source) + + # [BOM] + def test_bom(self): + self.run_test(codecs.BOM_UTF8 + self.source_line.encode('utf-8')) + + # [BOM and utf-8] + def test_bom_and_utf_8(self): + source = codecs.BOM_UTF8 + self.create_source('utf-8') + self.run_test(source) + + # [BOM conflict] + def test_bom_conflict(self): + source = codecs.BOM_UTF8 + self.create_source('latin-1') + with self.assertRaises(SyntaxError): + self.run_test(source) + + +class EncodingTestPEP451(EncodingTest): + + def load(self, loader): + module = types.ModuleType(self.module_name) + module.__spec__ = importlib.util.spec_from_loader(self.module_name, loader) + loader.exec_module(module) + return module + + +(Frozen_EncodingTestPEP451, + Source_EncodingTestPEP451 + ) = util.test_both(EncodingTestPEP451, machinery=machinery) + + +class EncodingTestPEP302(EncodingTest): + + def load(self, loader): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + return loader.load_module(self.module_name) + + +(Frozen_EncodingTestPEP302, + Source_EncodingTestPEP302 + ) = util.test_both(EncodingTestPEP302, machinery=machinery) + + +class LineEndingTest: + + r"""Source written with the three types of line endings (\n, \r\n, \r) + need to be readable [cr][crlf][lf].""" + + def run_test(self, line_ending): + module_name = '_temp' + source_lines = [b"a = 42", b"b = -13", b''] + source = line_ending.join(source_lines) + with util.create_modules(module_name) as mapping: + with open(mapping[module_name], 'wb') as file: + file.write(source) + loader = self.machinery.SourceFileLoader(module_name, + mapping[module_name]) + return self.load(loader, module_name) + + # [cr] + def test_cr(self): + self.run_test(b'\r') + + # [crlf] + def test_crlf(self): + self.run_test(b'\r\n') + + # [lf] + def test_lf(self): + self.run_test(b'\n') + + +class LineEndingTestPEP451(LineEndingTest): + + def load(self, loader, module_name): + module = types.ModuleType(module_name) + module.__spec__ = importlib.util.spec_from_loader(module_name, loader) + loader.exec_module(module) + return module + + +(Frozen_LineEndingTestPEP451, + Source_LineEndingTestPEP451 + ) = util.test_both(LineEndingTestPEP451, machinery=machinery) + + +class LineEndingTestPEP302(LineEndingTest): + + def load(self, loader, module_name): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + return loader.load_module(module_name) + + +(Frozen_LineEndingTestPEP302, + Source_LineEndingTestPEP302 + ) = util.test_both(LineEndingTestPEP302, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_abc.py b/stdlib/test/test_importlib/test_abc.py new file mode 100644 index 00000000..dd943210 --- /dev/null +++ b/stdlib/test/test_importlib/test_abc.py @@ -0,0 +1,943 @@ +import io +import marshal +import os +import sys +from test.support import import_helper +import types +import unittest +from unittest import mock +import warnings + +from test.test_importlib import util as test_util + +init = test_util.import_importlib('importlib') +abc = test_util.import_importlib('importlib.abc') +machinery = test_util.import_importlib('importlib.machinery') +util = test_util.import_importlib('importlib.util') + + +##### Inheritance ############################################################## +class InheritanceTests: + + """Test that the specified class is a subclass/superclass of the expected + classes.""" + + subclasses = [] + superclasses = [] + + def setUp(self): + self.superclasses = [getattr(self.abc, class_name) + for class_name in self.superclass_names] + if hasattr(self, 'subclass_names'): + # Because test.support.import_fresh_module() creates a new + # importlib._bootstrap per module, inheritance checks fail when + # checking across module boundaries (i.e. the _bootstrap in abc is + # not the same as the one in machinery). That means stealing one of + # the modules from the other to make sure the same instance is used. + machinery = self.abc.machinery + self.subclasses = [getattr(machinery, class_name) + for class_name in self.subclass_names] + assert self.subclasses or self.superclasses, self.__class__ + self.__test = getattr(self.abc, self._NAME) + + def test_subclasses(self): + # Test that the expected subclasses inherit. + for subclass in self.subclasses: + self.assertIsSubclass(subclass, self.__test) + + def test_superclasses(self): + # Test that the class inherits from the expected superclasses. + for superclass in self.superclasses: + self.assertIsSubclass(self.__test, superclass) + + +class MetaPathFinder(InheritanceTests): + superclass_names = [] + subclass_names = ['BuiltinImporter', 'FrozenImporter', 'PathFinder', + 'WindowsRegistryFinder'] + + +(Frozen_MetaPathFinderInheritanceTests, + Source_MetaPathFinderInheritanceTests + ) = test_util.test_both(MetaPathFinder, abc=abc) + + +class PathEntryFinder(InheritanceTests): + superclass_names = [] + subclass_names = ['FileFinder'] + + +(Frozen_PathEntryFinderInheritanceTests, + Source_PathEntryFinderInheritanceTests + ) = test_util.test_both(PathEntryFinder, abc=abc) + + +class ResourceLoader(InheritanceTests): + superclass_names = ['Loader'] + + +(Frozen_ResourceLoaderInheritanceTests, + Source_ResourceLoaderInheritanceTests + ) = test_util.test_both(ResourceLoader, abc=abc) + + +class InspectLoader(InheritanceTests): + superclass_names = ['Loader'] + subclass_names = ['BuiltinImporter', 'FrozenImporter', 'ExtensionFileLoader'] + + +(Frozen_InspectLoaderInheritanceTests, + Source_InspectLoaderInheritanceTests + ) = test_util.test_both(InspectLoader, abc=abc) + + +class ExecutionLoader(InheritanceTests): + superclass_names = ['InspectLoader'] + subclass_names = ['ExtensionFileLoader'] + + +(Frozen_ExecutionLoaderInheritanceTests, + Source_ExecutionLoaderInheritanceTests + ) = test_util.test_both(ExecutionLoader, abc=abc) + + +class FileLoader(InheritanceTests): + superclass_names = ['ResourceLoader', 'ExecutionLoader'] + subclass_names = ['SourceFileLoader', 'SourcelessFileLoader'] + + +(Frozen_FileLoaderInheritanceTests, + Source_FileLoaderInheritanceTests + ) = test_util.test_both(FileLoader, abc=abc) + + +class SourceLoader(InheritanceTests): + superclass_names = ['ResourceLoader', 'ExecutionLoader'] + subclass_names = ['SourceFileLoader'] + + +(Frozen_SourceLoaderInheritanceTests, + Source_SourceLoaderInheritanceTests + ) = test_util.test_both(SourceLoader, abc=abc) + + +##### Default return values #################################################### + +def make_abc_subclasses(base_class, name=None, inst=False, **kwargs): + if name is None: + name = base_class.__name__ + base = {kind: getattr(splitabc, name) + for kind, splitabc in abc.items()} + return {cls._KIND: cls() if inst else cls + for cls in test_util.split_frozen(base_class, base, **kwargs)} + + +class ABCTestHarness: + + @property + def ins(self): + # Lazily set ins on the class. + cls = self.SPLIT[self._KIND] + ins = cls() + self.__class__.ins = ins + return ins + + +class MetaPathFinder: + + pass + + +class MetaPathFinderDefaultsTests(ABCTestHarness): + + SPLIT = make_abc_subclasses(MetaPathFinder) + + def test_invalidate_caches(self): + # Calling the method is a no-op. + self.ins.invalidate_caches() + + +(Frozen_MPFDefaultTests, + Source_MPFDefaultTests + ) = test_util.test_both(MetaPathFinderDefaultsTests) + + +class PathEntryFinder: + + pass + + +class PathEntryFinderDefaultsTests(ABCTestHarness): + + SPLIT = make_abc_subclasses(PathEntryFinder) + + def test_invalidate_caches(self): + # Should be a no-op. + self.ins.invalidate_caches() + + +(Frozen_PEFDefaultTests, + Source_PEFDefaultTests + ) = test_util.test_both(PathEntryFinderDefaultsTests) + + +class Loader: + + pass + + +class LoaderDefaultsTests(ABCTestHarness): + + SPLIT = make_abc_subclasses(Loader) + + def test_create_module(self): + spec = 'a spec' + self.assertIsNone(self.ins.create_module(spec)) + + def test_load_module(self): + with self.assertRaises(ImportError): + self.ins.load_module('something') + + def test_module_repr(self): + mod = types.ModuleType('blah') + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + original_repr = repr(mod) + mod.__loader__ = self.ins + # Should still return a proper repr. + self.assertTrue(repr(mod)) + + +(Frozen_LDefaultTests, + SourceLDefaultTests + ) = test_util.test_both(LoaderDefaultsTests) + + +class ResourceLoader(Loader): + + def get_data(self, path): + return super().get_data(path) + + +class ResourceLoaderDefaultsTests(ABCTestHarness): + + SPLIT = make_abc_subclasses(ResourceLoader) + + def test_get_data(self): + with self.assertRaises(IOError): + self.ins.get_data('/some/path') + + +(Frozen_RLDefaultTests, + Source_RLDefaultTests + ) = test_util.test_both(ResourceLoaderDefaultsTests) + + +class InspectLoader(Loader): + + def is_package(self, fullname): + return super().is_package(fullname) + + def get_source(self, fullname): + return super().get_source(fullname) + + +SPLIT_IL = make_abc_subclasses(InspectLoader) + + +class InspectLoaderDefaultsTests(ABCTestHarness): + + SPLIT = SPLIT_IL + + def test_is_package(self): + with self.assertRaises(ImportError): + self.ins.is_package('blah') + + def test_get_source(self): + with self.assertRaises(ImportError): + self.ins.get_source('blah') + + +(Frozen_ILDefaultTests, + Source_ILDefaultTests + ) = test_util.test_both(InspectLoaderDefaultsTests) + + +class ExecutionLoader(InspectLoader): + + def get_filename(self, fullname): + return super().get_filename(fullname) + + +SPLIT_EL = make_abc_subclasses(ExecutionLoader) + + +class ExecutionLoaderDefaultsTests(ABCTestHarness): + + SPLIT = SPLIT_EL + + def test_get_filename(self): + with self.assertRaises(ImportError): + self.ins.get_filename('blah') + + +(Frozen_ELDefaultTests, + Source_ELDefaultsTests + ) = test_util.test_both(InspectLoaderDefaultsTests) + + +class ResourceReader: + + def open_resource(self, *args, **kwargs): + return super().open_resource(*args, **kwargs) + + def resource_path(self, *args, **kwargs): + return super().resource_path(*args, **kwargs) + + def is_resource(self, *args, **kwargs): + return super().is_resource(*args, **kwargs) + + def contents(self, *args, **kwargs): + return super().contents(*args, **kwargs) + + +##### MetaPathFinder concrete methods ########################################## +class MetaPathFinderFindModuleTests: + + @classmethod + def finder(cls, spec): + class MetaPathSpecFinder(cls.abc.MetaPathFinder): + + def find_spec(self, fullname, path, target=None): + self.called_for = fullname, path + return spec + + return MetaPathSpecFinder() + + def test_find_spec_with_explicit_target(self): + loader = object() + spec = self.util.spec_from_loader('blah', loader) + finder = self.finder(spec) + found = finder.find_spec('blah', 'blah', None) + self.assertEqual(found, spec) + + def test_no_spec(self): + finder = self.finder(None) + path = ['a', 'b', 'c'] + name = 'blah' + found = finder.find_spec(name, path, None) + self.assertIsNone(found) + self.assertEqual(name, finder.called_for[0]) + self.assertEqual(path, finder.called_for[1]) + + def test_spec(self): + loader = object() + spec = self.util.spec_from_loader('blah', loader) + finder = self.finder(spec) + found = finder.find_spec('blah', None) + self.assertIs(found, spec) + + +(Frozen_MPFFindModuleTests, + Source_MPFFindModuleTests + ) = test_util.test_both(MetaPathFinderFindModuleTests, abc=abc, util=util) + + +##### Loader concrete methods ################################################## +class LoaderLoadModuleTests: + + def loader(self): + class SpecLoader(self.abc.Loader): + found = None + def exec_module(self, module): + self.found = module + + def is_package(self, fullname): + """Force some non-default module state to be set.""" + return True + + return SpecLoader() + + def test_fresh(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + loader = self.loader() + name = 'blah' + with test_util.uncache(name): + loader.load_module(name) + module = loader.found + self.assertIs(sys.modules[name], module) + self.assertEqual(loader, module.__loader__) + self.assertEqual(loader, module.__spec__.loader) + self.assertEqual(name, module.__name__) + self.assertEqual(name, module.__spec__.name) + self.assertIsNotNone(module.__path__) + self.assertIsNotNone(module.__path__, + module.__spec__.submodule_search_locations) + + def test_reload(self): + with warnings.catch_warnings(): + warnings.simplefilter("ignore", DeprecationWarning) + name = 'blah' + loader = self.loader() + module = types.ModuleType(name) + module.__spec__ = self.util.spec_from_loader(name, loader) + module.__loader__ = loader + with test_util.uncache(name): + sys.modules[name] = module + loader.load_module(name) + found = loader.found + self.assertIs(found, sys.modules[name]) + self.assertIs(module, sys.modules[name]) + + +(Frozen_LoaderLoadModuleTests, + Source_LoaderLoadModuleTests + ) = test_util.test_both(LoaderLoadModuleTests, abc=abc, util=util) + + +##### InspectLoader concrete methods ########################################### +class InspectLoaderSourceToCodeTests: + + def source_to_module(self, data, path=None): + """Help with source_to_code() tests.""" + module = types.ModuleType('blah') + loader = self.InspectLoaderSubclass() + if path is None: + code = loader.source_to_code(data) + else: + code = loader.source_to_code(data, path) + exec(code, module.__dict__) + return module + + def test_source_to_code_source(self): + # Since compile() can handle strings, so should source_to_code(). + source = 'attr = 42' + module = self.source_to_module(source) + self.assertHasAttr(module, 'attr') + self.assertEqual(module.attr, 42) + + def test_source_to_code_bytes(self): + # Since compile() can handle bytes, so should source_to_code(). + source = b'attr = 42' + module = self.source_to_module(source) + self.assertHasAttr(module, 'attr') + self.assertEqual(module.attr, 42) + + def test_source_to_code_path(self): + # Specifying a path should set it for the code object. + path = 'path/to/somewhere' + loader = self.InspectLoaderSubclass() + code = loader.source_to_code('', path) + self.assertEqual(code.co_filename, path) + + def test_source_to_code_no_path(self): + # Not setting a path should still work and be set to since that + # is a pre-existing practice as a default to compile(). + loader = self.InspectLoaderSubclass() + code = loader.source_to_code('') + self.assertEqual(code.co_filename, '') + + +(Frozen_ILSourceToCodeTests, + Source_ILSourceToCodeTests + ) = test_util.test_both(InspectLoaderSourceToCodeTests, + InspectLoaderSubclass=SPLIT_IL) + + +class InspectLoaderGetCodeTests: + + def test_get_code(self): + # Test success. + module = types.ModuleType('blah') + with mock.patch.object(self.InspectLoaderSubclass, 'get_source') as mocked: + mocked.return_value = 'attr = 42' + loader = self.InspectLoaderSubclass() + code = loader.get_code('blah') + exec(code, module.__dict__) + self.assertEqual(module.attr, 42) + + def test_get_code_source_is_None(self): + # If get_source() is None then this should be None. + with mock.patch.object(self.InspectLoaderSubclass, 'get_source') as mocked: + mocked.return_value = None + loader = self.InspectLoaderSubclass() + code = loader.get_code('blah') + self.assertIsNone(code) + + def test_get_code_source_not_found(self): + # If there is no source then there is no code object. + loader = self.InspectLoaderSubclass() + with self.assertRaises(ImportError): + loader.get_code('blah') + + +(Frozen_ILGetCodeTests, + Source_ILGetCodeTests + ) = test_util.test_both(InspectLoaderGetCodeTests, + InspectLoaderSubclass=SPLIT_IL) + + +class InspectLoaderLoadModuleTests: + + """Test InspectLoader.load_module().""" + + module_name = 'blah' + + def setUp(self): + import_helper.unload(self.module_name) + self.addCleanup(import_helper.unload, self.module_name) + + def load(self, loader): + spec = self.util.spec_from_loader(self.module_name, loader) + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + return self.init._bootstrap._load_unlocked(spec) + + def mock_get_code(self): + return mock.patch.object(self.InspectLoaderSubclass, 'get_code') + + def test_get_code_ImportError(self): + # If get_code() raises ImportError, it should propagate. + with self.mock_get_code() as mocked_get_code: + mocked_get_code.side_effect = ImportError + with self.assertRaises(ImportError): + loader = self.InspectLoaderSubclass() + self.load(loader) + + def test_get_code_None(self): + # If get_code() returns None, raise ImportError. + with self.mock_get_code() as mocked_get_code: + mocked_get_code.return_value = None + with self.assertRaises(ImportError): + loader = self.InspectLoaderSubclass() + self.load(loader) + + def test_module_returned(self): + # The loaded module should be returned. + code = compile('attr = 42', '', 'exec') + with self.mock_get_code() as mocked_get_code: + mocked_get_code.return_value = code + loader = self.InspectLoaderSubclass() + module = self.load(loader) + self.assertEqual(module, sys.modules[self.module_name]) + + +(Frozen_ILLoadModuleTests, + Source_ILLoadModuleTests + ) = test_util.test_both(InspectLoaderLoadModuleTests, + InspectLoaderSubclass=SPLIT_IL, + init=init, + util=util) + + +##### ExecutionLoader concrete methods ######################################### +class ExecutionLoaderGetCodeTests: + + def mock_methods(self, *, get_source=False, get_filename=False): + source_mock_context, filename_mock_context = None, None + if get_source: + source_mock_context = mock.patch.object(self.ExecutionLoaderSubclass, + 'get_source') + if get_filename: + filename_mock_context = mock.patch.object(self.ExecutionLoaderSubclass, + 'get_filename') + return source_mock_context, filename_mock_context + + def test_get_code(self): + path = 'blah.py' + source_mock_context, filename_mock_context = self.mock_methods( + get_source=True, get_filename=True) + with source_mock_context as source_mock, filename_mock_context as name_mock: + source_mock.return_value = 'attr = 42' + name_mock.return_value = path + loader = self.ExecutionLoaderSubclass() + code = loader.get_code('blah') + self.assertEqual(code.co_filename, path) + module = types.ModuleType('blah') + exec(code, module.__dict__) + self.assertEqual(module.attr, 42) + + def test_get_code_source_is_None(self): + # If get_source() is None then this should be None. + source_mock_context, _ = self.mock_methods(get_source=True) + with source_mock_context as mocked: + mocked.return_value = None + loader = self.ExecutionLoaderSubclass() + code = loader.get_code('blah') + self.assertIsNone(code) + + def test_get_code_source_not_found(self): + # If there is no source then there is no code object. + loader = self.ExecutionLoaderSubclass() + with self.assertRaises(ImportError): + loader.get_code('blah') + + def test_get_code_no_path(self): + # If get_filename() raises ImportError then simply skip setting the path + # on the code object. + source_mock_context, filename_mock_context = self.mock_methods( + get_source=True, get_filename=True) + with source_mock_context as source_mock, filename_mock_context as name_mock: + source_mock.return_value = 'attr = 42' + name_mock.side_effect = ImportError + loader = self.ExecutionLoaderSubclass() + code = loader.get_code('blah') + self.assertEqual(code.co_filename, '') + module = types.ModuleType('blah') + exec(code, module.__dict__) + self.assertEqual(module.attr, 42) + + +(Frozen_ELGetCodeTests, + Source_ELGetCodeTests + ) = test_util.test_both(ExecutionLoaderGetCodeTests, + ExecutionLoaderSubclass=SPLIT_EL) + + +##### SourceLoader concrete methods ############################################ +class SourceOnlyLoader: + + # Globals that should be defined for all modules. + source = (b"_ = '::'.join([__name__, __file__, __cached__, __package__, " + b"repr(__loader__)])") + + def __init__(self, path): + self.path = path + + def get_data(self, path): + if path != self.path: + raise IOError + return self.source + + def get_filename(self, fullname): + return self.path + + +SPLIT_SOL = make_abc_subclasses(SourceOnlyLoader, 'SourceLoader') + + +class SourceLoader(SourceOnlyLoader): + + source_mtime = 1 + + def __init__(self, path, magic=None): + super().__init__(path) + self.bytecode_path = self.util.cache_from_source(self.path) + self.source_size = len(self.source) + if magic is None: + magic = self.util.MAGIC_NUMBER + data = bytearray(magic) + data.extend(self.init._pack_uint32(0)) + data.extend(self.init._pack_uint32(self.source_mtime)) + data.extend(self.init._pack_uint32(self.source_size)) + code_object = compile(self.source, self.path, 'exec', + dont_inherit=True) + data.extend(marshal.dumps(code_object)) + self.bytecode = bytes(data) + self.written = {} + + def get_data(self, path): + if path == self.path: + return super().get_data(path) + elif path == self.bytecode_path: + return self.bytecode + else: + raise OSError + + def path_stats(self, path): + if path != self.path: + raise IOError + return {'mtime': self.source_mtime, 'size': self.source_size} + + def set_data(self, path, data): + self.written[path] = bytes(data) + return path == self.bytecode_path + + +SPLIT_SL = make_abc_subclasses(SourceLoader, util=util, init=init) + + +class SourceLoaderTestHarness: + + def setUp(self, *, is_package=True, **kwargs): + self.package = 'pkg' + if is_package: + self.path = os.path.join(self.package, '__init__.py') + self.name = self.package + else: + module_name = 'mod' + self.path = os.path.join(self.package, '.'.join(['mod', 'py'])) + self.name = '.'.join([self.package, module_name]) + self.cached = self.util.cache_from_source(self.path) + self.loader = self.loader_mock(self.path, **kwargs) + + def verify_module(self, module): + self.assertEqual(module.__name__, self.name) + self.assertEqual(module.__file__, self.path) + self.assertEqual(module.__cached__, self.cached) + self.assertEqual(module.__package__, self.package) + self.assertEqual(module.__loader__, self.loader) + values = module._.split('::') + self.assertEqual(values[0], self.name) + self.assertEqual(values[1], self.path) + self.assertEqual(values[2], self.cached) + self.assertEqual(values[3], self.package) + self.assertEqual(values[4], repr(self.loader)) + + def verify_code(self, code_object): + module = types.ModuleType(self.name) + module.__file__ = self.path + module.__cached__ = self.cached + module.__package__ = self.package + module.__loader__ = self.loader + module.__path__ = [] + exec(code_object, module.__dict__) + self.verify_module(module) + + +class SourceOnlyLoaderTests(SourceLoaderTestHarness): + """Test importlib.abc.SourceLoader for source-only loading.""" + + def test_get_source(self): + # Verify the source code is returned as a string. + # If an OSError is raised by get_data then raise ImportError. + expected_source = self.loader.source.decode('utf-8') + self.assertEqual(self.loader.get_source(self.name), expected_source) + def raise_OSError(path): + raise OSError + self.loader.get_data = raise_OSError + with self.assertRaises(ImportError) as cm: + self.loader.get_source(self.name) + self.assertEqual(cm.exception.name, self.name) + + def test_is_package(self): + # Properly detect when loading a package. + self.setUp(is_package=False) + self.assertFalse(self.loader.is_package(self.name)) + self.setUp(is_package=True) + self.assertTrue(self.loader.is_package(self.name)) + self.assertFalse(self.loader.is_package(self.name + '.__init__')) + + def test_get_code(self): + # Verify the code object is created. + code_object = self.loader.get_code(self.name) + self.verify_code(code_object) + + def test_source_to_code(self): + # Verify the compiled code object. + code = self.loader.source_to_code(self.loader.source, self.path) + self.verify_code(code) + + def test_load_module(self): + # Loading a module should set __name__, __loader__, __package__, + # __path__ (for packages), __file__, and __cached__. + # The module should also be put into sys.modules. + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + with test_util.uncache(self.name): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = self.loader.load_module(self.name) + self.verify_module(module) + self.assertEqual(module.__path__, [os.path.dirname(self.path)]) + self.assertIn(self.name, sys.modules) + + def test_package_settings(self): + # __package__ needs to be set, while __path__ is set on if the module + # is a package. + # Testing the values for a package are covered by test_load_module. + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + self.setUp(is_package=False) + with test_util.uncache(self.name): + with warnings.catch_warnings(): + warnings.simplefilter('ignore', DeprecationWarning) + module = self.loader.load_module(self.name) + self.verify_module(module) + self.assertNotHasAttr(module, '__path__') + + def test_get_source_encoding(self): + # Source is considered encoded in UTF-8 by default unless otherwise + # specified by an encoding line. + source = "_ = 'ü'" + self.loader.source = source.encode('utf-8') + returned_source = self.loader.get_source(self.name) + self.assertEqual(returned_source, source) + source = "# coding: latin-1\n_ = ü" + self.loader.source = source.encode('latin-1') + returned_source = self.loader.get_source(self.name) + self.assertEqual(returned_source, source) + + +(Frozen_SourceOnlyLoaderTests, + Source_SourceOnlyLoaderTests + ) = test_util.test_both(SourceOnlyLoaderTests, util=util, + loader_mock=SPLIT_SOL) + + +@unittest.skipIf(sys.dont_write_bytecode, "sys.dont_write_bytecode is true") +class SourceLoaderBytecodeTests(SourceLoaderTestHarness): + + """Test importlib.abc.SourceLoader's use of bytecode. + + Source-only testing handled by SourceOnlyLoaderTests. + + """ + + def verify_code(self, code_object, *, bytecode_written=False): + super().verify_code(code_object) + if bytecode_written: + self.assertIn(self.cached, self.loader.written) + data = bytearray(self.util.MAGIC_NUMBER) + data.extend(self.init._pack_uint32(0)) + data.extend(self.init._pack_uint32(self.loader.source_mtime)) + data.extend(self.init._pack_uint32(self.loader.source_size)) + # Make sure there's > 1 reference to code_object so that the + # marshaled representation below matches the cached representation + l = [code_object] + data.extend(marshal.dumps(code_object)) + self.assertEqual(self.loader.written[self.cached], bytes(data)) + + def test_code_with_everything(self): + # When everything should work. + code_object = self.loader.get_code(self.name) + self.verify_code(code_object) + + def test_no_bytecode(self): + # If no bytecode exists then move on to the source. + self.loader.bytecode_path = "" + # Sanity check + with self.assertRaises(OSError): + bytecode_path = self.util.cache_from_source(self.path) + self.loader.get_data(bytecode_path) + code_object = self.loader.get_code(self.name) + self.verify_code(code_object, bytecode_written=True) + + def test_code_bad_timestamp(self): + # Bytecode is only used when the timestamp matches the source EXACTLY. + for source_mtime in (0, 2): + assert source_mtime != self.loader.source_mtime + original = self.loader.source_mtime + self.loader.source_mtime = source_mtime + # If bytecode is used then EOFError would be raised by marshal. + self.loader.bytecode = self.loader.bytecode[8:] + code_object = self.loader.get_code(self.name) + self.verify_code(code_object, bytecode_written=True) + self.loader.source_mtime = original + + def test_code_bad_magic(self): + # Skip over bytecode with a bad magic number. + self.setUp(magic=b'0000') + # If bytecode is used then EOFError would be raised by marshal. + self.loader.bytecode = self.loader.bytecode[8:] + code_object = self.loader.get_code(self.name) + self.verify_code(code_object, bytecode_written=True) + + def test_dont_write_bytecode(self): + # Bytecode is not written if sys.dont_write_bytecode is true. + # Can assume it is false already thanks to the skipIf class decorator. + try: + sys.dont_write_bytecode = True + self.loader.bytecode_path = "" + code_object = self.loader.get_code(self.name) + self.assertNotIn(self.cached, self.loader.written) + finally: + sys.dont_write_bytecode = False + + def test_no_set_data(self): + # If set_data is not defined, one can still read bytecode. + self.setUp(magic=b'0000') + original_set_data = self.loader.__class__.mro()[1].set_data + try: + del self.loader.__class__.mro()[1].set_data + code_object = self.loader.get_code(self.name) + self.verify_code(code_object) + finally: + self.loader.__class__.mro()[1].set_data = original_set_data + + def test_set_data_raises_exceptions(self): + # Raising NotImplementedError or OSError is okay for set_data. + def raise_exception(exc): + def closure(*args, **kwargs): + raise exc + return closure + + self.setUp(magic=b'0000') + self.loader.set_data = raise_exception(NotImplementedError) + code_object = self.loader.get_code(self.name) + self.verify_code(code_object) + + +(Frozen_SLBytecodeTests, + SourceSLBytecodeTests + ) = test_util.test_both(SourceLoaderBytecodeTests, init=init, util=util, + loader_mock=SPLIT_SL) + + +class SourceLoaderGetSourceTests: + + """Tests for importlib.abc.SourceLoader.get_source().""" + + def test_default_encoding(self): + # Should have no problems with UTF-8 text. + name = 'mod' + mock = self.SourceOnlyLoaderMock('mod.file') + source = 'x = "ü"' + mock.source = source.encode('utf-8') + returned_source = mock.get_source(name) + self.assertEqual(returned_source, source) + + def test_decoded_source(self): + # Decoding should work. + name = 'mod' + mock = self.SourceOnlyLoaderMock("mod.file") + source = "# coding: Latin-1\nx='ü'" + assert source.encode('latin-1') != source.encode('utf-8') + mock.source = source.encode('latin-1') + returned_source = mock.get_source(name) + self.assertEqual(returned_source, source) + + def test_universal_newlines(self): + # PEP 302 says universal newlines should be used. + name = 'mod' + mock = self.SourceOnlyLoaderMock('mod.file') + source = "x = 42\r\ny = -13\r\n" + mock.source = source.encode('utf-8') + expect = io.IncrementalNewlineDecoder(None, True).decode(source) + self.assertEqual(mock.get_source(name), expect) + + +(Frozen_SourceOnlyLoaderGetSourceTests, + Source_SourceOnlyLoaderGetSourceTests + ) = test_util.test_both(SourceLoaderGetSourceTests, + SourceOnlyLoaderMock=SPLIT_SOL) + + +class SourceLoaderDeprecationWarningsTests(unittest.TestCase): + """Tests SourceLoader deprecation warnings.""" + + def test_deprecated_path_mtime(self): + from importlib.abc import SourceLoader + class DummySourceLoader(SourceLoader): + def get_data(self, path): + return b'' + + def get_filename(self, fullname): + return 'foo.py' + + def path_stats(self, path): + return {'mtime': 1} + + loader = DummySourceLoader() + + with self.assertWarnsRegex( + DeprecationWarning, + r"SourceLoader\.path_mtime is deprecated in favour of " + r"SourceLoader\.path_stats\(\)\." + ): + loader.path_mtime('foo.py') + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_api.py b/stdlib/test/test_importlib/test_api.py new file mode 100644 index 00000000..1bc531a2 --- /dev/null +++ b/stdlib/test/test_importlib/test_api.py @@ -0,0 +1,508 @@ +from test.test_importlib import util as test_util + +init = test_util.import_importlib('importlib') +util = test_util.import_importlib('importlib.util') +machinery = test_util.import_importlib('importlib.machinery') + +import os.path +import sys +from test import support +from test.support import import_helper +from test.support import os_helper +import traceback +import types +import unittest + + +class ImportModuleTests: + + """Test importlib.import_module.""" + + def test_module_import(self): + # Test importing a top-level module. + with test_util.mock_spec('top_level') as mock: + with test_util.import_state(meta_path=[mock]): + module = self.init.import_module('top_level') + self.assertEqual(module.__name__, 'top_level') + + def test_absolute_package_import(self): + # Test importing a module from a package with an absolute name. + pkg_name = 'pkg' + pkg_long_name = '{0}.__init__'.format(pkg_name) + name = '{0}.mod'.format(pkg_name) + with test_util.mock_spec(pkg_long_name, name) as mock: + with test_util.import_state(meta_path=[mock]): + module = self.init.import_module(name) + self.assertEqual(module.__name__, name) + + def test_shallow_relative_package_import(self): + # Test importing a module from a package through a relative import. + pkg_name = 'pkg' + pkg_long_name = '{0}.__init__'.format(pkg_name) + module_name = 'mod' + absolute_name = '{0}.{1}'.format(pkg_name, module_name) + relative_name = '.{0}'.format(module_name) + with test_util.mock_spec(pkg_long_name, absolute_name) as mock: + with test_util.import_state(meta_path=[mock]): + self.init.import_module(pkg_name) + module = self.init.import_module(relative_name, pkg_name) + self.assertEqual(module.__name__, absolute_name) + + def test_deep_relative_package_import(self): + modules = ['a.__init__', 'a.b.__init__', 'a.c'] + with test_util.mock_spec(*modules) as mock: + with test_util.import_state(meta_path=[mock]): + self.init.import_module('a') + self.init.import_module('a.b') + module = self.init.import_module('..c', 'a.b') + self.assertEqual(module.__name__, 'a.c') + + def test_absolute_import_with_package(self): + # Test importing a module from a package with an absolute name with + # the 'package' argument given. + pkg_name = 'pkg' + pkg_long_name = '{0}.__init__'.format(pkg_name) + name = '{0}.mod'.format(pkg_name) + with test_util.mock_spec(pkg_long_name, name) as mock: + with test_util.import_state(meta_path=[mock]): + self.init.import_module(pkg_name) + module = self.init.import_module(name, pkg_name) + self.assertEqual(module.__name__, name) + + def test_relative_import_wo_package(self): + # Relative imports cannot happen without the 'package' argument being + # set. + with self.assertRaises(TypeError): + self.init.import_module('.support') + + + def test_loaded_once(self): + # Issue #13591: Modules should only be loaded once when + # initializing the parent package attempts to import the + # module currently being imported. + b_load_count = 0 + def load_a(): + self.init.import_module('a.b') + def load_b(): + nonlocal b_load_count + b_load_count += 1 + code = {'a': load_a, 'a.b': load_b} + modules = ['a.__init__', 'a.b'] + with test_util.mock_spec(*modules, module_code=code) as mock: + with test_util.import_state(meta_path=[mock]): + self.init.import_module('a.b') + self.assertEqual(b_load_count, 1) + + +(Frozen_ImportModuleTests, + Source_ImportModuleTests + ) = test_util.test_both( + ImportModuleTests, init=init, util=util, machinery=machinery) + + +class FindLoaderTests: + + FakeMetaFinder = None + + def test_sys_modules(self): + # If a module with __spec__.loader is in sys.modules, then return it. + name = 'some_mod' + with test_util.uncache(name): + module = types.ModuleType(name) + loader = 'a loader!' + module.__spec__ = self.machinery.ModuleSpec(name, loader) + sys.modules[name] = module + spec = self.util.find_spec(name) + self.assertIsNotNone(spec) + self.assertEqual(spec.loader, loader) + + def test_sys_modules_loader_is_None(self): + # If sys.modules[name].__spec__.loader is None, raise ValueError. + name = 'some_mod' + with test_util.uncache(name): + module = types.ModuleType(name) + module.__loader__ = None + sys.modules[name] = module + with self.assertRaises(ValueError): + self.util.find_spec(name) + + def test_sys_modules_loader_is_not_set(self): + # Should raise ValueError + # Issue #17099 + name = 'some_mod' + with test_util.uncache(name): + module = types.ModuleType(name) + try: + del module.__spec__.loader + except AttributeError: + pass + sys.modules[name] = module + with self.assertRaises(ValueError): + self.util.find_spec(name) + + def test_success(self): + # Return the loader found on sys.meta_path. + name = 'some_mod' + with test_util.uncache(name): + with test_util.import_state(meta_path=[self.FakeMetaFinder]): + spec = self.util.find_spec(name) + self.assertEqual((name, (name, None)), (spec.name, spec.loader)) + + def test_success_path(self): + # Searching on a path should work. + name = 'some_mod' + path = 'path to some place' + with test_util.uncache(name): + with test_util.import_state(meta_path=[self.FakeMetaFinder]): + spec = self.util.find_spec(name, path) + self.assertEqual(name, spec.name) + + def test_nothing(self): + # None is returned upon failure to find a loader. + self.assertIsNone(self.util.find_spec('nevergoingtofindthismodule')) + + +class FindLoaderPEP451Tests(FindLoaderTests): + + class FakeMetaFinder: + @staticmethod + def find_spec(name, path=None, target=None): + return machinery['Source'].ModuleSpec(name, (name, path)) + + +(Frozen_FindLoaderPEP451Tests, + Source_FindLoaderPEP451Tests + ) = test_util.test_both( + FindLoaderPEP451Tests, init=init, util=util, machinery=machinery) + + +class ReloadTests: + + def test_reload_modules(self): + for mod in ('tokenize', 'time', 'marshal'): + with self.subTest(module=mod): + with import_helper.CleanImport(mod): + module = self.init.import_module(mod) + self.init.reload(module) + + def test_module_replaced(self): + def code(): + import sys + module = type(sys)('top_level') + module.spam = 3 + sys.modules['top_level'] = module + mock = test_util.mock_spec('top_level', + module_code={'top_level': code}) + with mock: + with test_util.import_state(meta_path=[mock]): + module = self.init.import_module('top_level') + reloaded = self.init.reload(module) + actual = sys.modules['top_level'] + self.assertEqual(actual.spam, 3) + self.assertEqual(reloaded.spam, 3) + + def test_reload_missing_loader(self): + with import_helper.CleanImport('types'): + import types + loader = types.__loader__ + del types.__loader__ + reloaded = self.init.reload(types) + + self.assertIs(reloaded, types) + self.assertIs(sys.modules['types'], types) + self.assertEqual(reloaded.__loader__.path, loader.path) + + def test_reload_loader_replaced(self): + with import_helper.CleanImport('types'): + import types + types.__loader__ = None + self.init.invalidate_caches() + reloaded = self.init.reload(types) + + self.assertIsNot(reloaded.__loader__, None) + self.assertIs(reloaded, types) + self.assertIs(sys.modules['types'], types) + + def test_reload_location_changed(self): + name = 'spam' + with os_helper.temp_cwd(None) as cwd: + with test_util.uncache('spam'): + with import_helper.DirsOnSysPath(cwd): + # Start as a plain module. + self.init.invalidate_caches() + path = os.path.join(cwd, name + '.py') + cached = self.util.cache_from_source(path) + expected = {'__name__': name, + '__package__': '', + '__file__': path, + '__cached__': cached, + '__doc__': None, + } + os_helper.create_empty_file(path) + module = self.init.import_module(name) + ns = vars(module).copy() + loader = ns.pop('__loader__') + spec = ns.pop('__spec__') + ns.pop('__builtins__', None) # An implementation detail. + self.assertEqual(spec.name, name) + self.assertEqual(spec.loader, loader) + self.assertEqual(loader.path, path) + self.assertEqual(ns, expected) + + # Change to a package. + self.init.invalidate_caches() + init_path = os.path.join(cwd, name, '__init__.py') + cached = self.util.cache_from_source(init_path) + expected = {'__name__': name, + '__package__': name, + '__file__': init_path, + '__cached__': cached, + '__path__': [os.path.dirname(init_path)], + '__doc__': None, + } + os.mkdir(name) + os.rename(path, init_path) + reloaded = self.init.reload(module) + ns = vars(reloaded).copy() + loader = ns.pop('__loader__') + spec = ns.pop('__spec__') + ns.pop('__builtins__', None) # An implementation detail. + self.assertEqual(spec.name, name) + self.assertEqual(spec.loader, loader) + self.assertIs(reloaded, module) + self.assertEqual(loader.path, init_path) + self.maxDiff = None + self.assertEqual(ns, expected) + + def test_reload_namespace_changed(self): + name = 'spam' + with os_helper.temp_cwd(None) as cwd: + with test_util.uncache('spam'): + with test_util.import_state(path=[cwd]): + self.init._bootstrap_external._install(self.init._bootstrap) + # Start as a namespace package. + self.init.invalidate_caches() + bad_path = os.path.join(cwd, name, '__init.py') + cached = self.util.cache_from_source(bad_path) + expected = {'__name__': name, + '__package__': name, + '__doc__': None, + '__file__': None, + } + os.mkdir(name) + with open(bad_path, 'w', encoding='utf-8') as init_file: + init_file.write('eggs = None') + module = self.init.import_module(name) + ns = vars(module).copy() + loader = ns.pop('__loader__') + path = ns.pop('__path__') + spec = ns.pop('__spec__') + ns.pop('__builtins__', None) # An implementation detail. + self.assertEqual(spec.name, name) + self.assertIsNotNone(spec.loader) + self.assertIsNotNone(loader) + self.assertEqual(spec.loader, loader) + self.assertEqual(set(path), + set([os.path.dirname(bad_path)])) + with self.assertRaises(AttributeError): + # a NamespaceLoader + loader.path + self.assertEqual(ns, expected) + + # Change to a regular package. + self.init.invalidate_caches() + init_path = os.path.join(cwd, name, '__init__.py') + cached = self.util.cache_from_source(init_path) + expected = {'__name__': name, + '__package__': name, + '__file__': init_path, + '__cached__': cached, + '__path__': [os.path.dirname(init_path)], + '__doc__': None, + 'eggs': None, + } + os.rename(bad_path, init_path) + reloaded = self.init.reload(module) + ns = vars(reloaded).copy() + loader = ns.pop('__loader__') + spec = ns.pop('__spec__') + ns.pop('__builtins__', None) # An implementation detail. + self.assertEqual(spec.name, name) + self.assertEqual(spec.loader, loader) + self.assertIs(reloaded, module) + self.assertEqual(loader.path, init_path) + self.assertEqual(ns, expected) + + def test_reload_submodule(self): + # See #19851. + name = 'spam' + subname = 'ham' + with test_util.temp_module(name, pkg=True) as pkg_dir: + fullname, _ = test_util.submodule(name, subname, pkg_dir) + ham = self.init.import_module(fullname) + reloaded = self.init.reload(ham) + self.assertIs(reloaded, ham) + + def test_module_missing_spec(self): + #Test that reload() throws ModuleNotFounderror when reloading + # a module whose missing a spec. (bpo-29851) + name = 'spam' + with test_util.uncache(name): + module = sys.modules[name] = types.ModuleType(name) + # Sanity check by attempting an import. + module = self.init.import_module(name) + self.assertIsNone(module.__spec__) + with self.assertRaises(ModuleNotFoundError): + self.init.reload(module) + + def test_reload_traceback_with_non_str(self): + # gh-125519 + with support.captured_stdout() as stdout: + try: + self.init.reload("typing") + except TypeError as exc: + traceback.print_exception(exc, file=stdout) + else: + self.fail("Expected TypeError to be raised") + printed_traceback = stdout.getvalue() + self.assertIn("TypeError", printed_traceback) + self.assertNotIn("AttributeError", printed_traceback) + self.assertNotIn("module.__spec__.name", printed_traceback) + + +(Frozen_ReloadTests, + Source_ReloadTests + ) = test_util.test_both( + ReloadTests, init=init, util=util, machinery=machinery) + + +class InvalidateCacheTests: + + def test_method_called(self): + # If defined the method should be called. + class InvalidatingNullFinder: + def __init__(self, *ignored): + self.called = False + def invalidate_caches(self): + self.called = True + + key = os.path.abspath('gobledeegook') + meta_ins = InvalidatingNullFinder() + path_ins = InvalidatingNullFinder() + sys.meta_path.insert(0, meta_ins) + self.addCleanup(lambda: sys.path_importer_cache.__delitem__(key)) + sys.path_importer_cache[key] = path_ins + self.addCleanup(lambda: sys.meta_path.remove(meta_ins)) + self.init.invalidate_caches() + self.assertTrue(meta_ins.called) + self.assertTrue(path_ins.called) + + def test_method_lacking(self): + # There should be no issues if the method is not defined. + key = 'gobbledeegook' + sys.path_importer_cache[key] = None + self.addCleanup(lambda: sys.path_importer_cache.pop(key, None)) + self.init.invalidate_caches() # Shouldn't trigger an exception. + + +(Frozen_InvalidateCacheTests, + Source_InvalidateCacheTests + ) = test_util.test_both( + InvalidateCacheTests, init=init, util=util, machinery=machinery) + + +class FrozenImportlibTests(unittest.TestCase): + + def test_no_frozen_importlib(self): + # Should be able to import w/o _frozen_importlib being defined. + # Can't do an isinstance() check since separate copies of importlib + # may have been used for import, so just check the name is not for the + # frozen loader. + source_init = init['Source'] + self.assertNotEqual(source_init.__loader__.__class__.__name__, + 'FrozenImporter') + + +class StartupTests: + + def test_everyone_has___loader__(self): + # Issue #17098: all modules should have __loader__ defined. + for name, module in sys.modules.items(): + if isinstance(module, types.ModuleType): + with self.subTest(name=name): + self.assertHasAttr(module, '__loader__') + if self.machinery.BuiltinImporter.find_spec(name): + self.assertIsNot(module.__loader__, None) + elif self.machinery.FrozenImporter.find_spec(name): + self.assertIsNot(module.__loader__, None) + + def test_everyone_has___spec__(self): + for name, module in sys.modules.items(): + if isinstance(module, types.ModuleType): + with self.subTest(name=name): + self.assertHasAttr(module, '__spec__') + if self.machinery.BuiltinImporter.find_spec(name): + self.assertIsNot(module.__spec__, None) + elif self.machinery.FrozenImporter.find_spec(name): + self.assertIsNot(module.__spec__, None) + + +(Frozen_StartupTests, + Source_StartupTests + ) = test_util.test_both(StartupTests, machinery=machinery) + + +class TestModuleAll(unittest.TestCase): + def test_machinery(self): + extra = ( + # from importlib._bootstrap and importlib._bootstrap_external + 'AppleFrameworkLoader', + 'BYTECODE_SUFFIXES', + 'BuiltinImporter', + 'DEBUG_BYTECODE_SUFFIXES', + 'EXTENSION_SUFFIXES', + 'ExtensionFileLoader', + 'FileFinder', + 'FrozenImporter', + 'ModuleSpec', + 'NamespaceLoader', + 'OPTIMIZED_BYTECODE_SUFFIXES', + 'PathFinder', + 'SOURCE_SUFFIXES', + 'SourceFileLoader', + 'SourcelessFileLoader', + 'WindowsRegistryFinder', + ) + support.check__all__(self, machinery['Source'], extra=extra) + + def test_util(self): + extra = ( + # from importlib.abc, importlib._bootstrap + # and importlib._bootstrap_external + 'Loader', + 'MAGIC_NUMBER', + 'cache_from_source', + 'decode_source', + 'module_from_spec', + 'source_from_cache', + 'spec_from_file_location', + 'spec_from_loader', + ) + support.check__all__(self, util['Source'], extra=extra) + + +class TestDeprecations(unittest.TestCase): + def test_machinery_deprecated_attributes(self): + from importlib import machinery + attributes = ( + 'DEBUG_BYTECODE_SUFFIXES', + 'OPTIMIZED_BYTECODE_SUFFIXES', + ) + for attr in attributes: + with self.subTest(attr=attr): + with self.assertWarns(DeprecationWarning): + getattr(machinery, attr) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_lazy.py b/stdlib/test/test_importlib/test_lazy.py new file mode 100644 index 00000000..e48fad88 --- /dev/null +++ b/stdlib/test/test_importlib/test_lazy.py @@ -0,0 +1,229 @@ +import importlib +from importlib import abc +from importlib import util +import sys +import time +import threading +import types +import unittest + +from test.support import threading_helper +from test.test_importlib import util as test_util + + +class CollectInit: + + def __init__(self, *args, **kwargs): + self.args = args + self.kwargs = kwargs + + def exec_module(self, module): + return self + + +class LazyLoaderFactoryTests(unittest.TestCase): + + def test_init(self): + factory = util.LazyLoader.factory(CollectInit) + # E.g. what importlib.machinery.FileFinder instantiates loaders with + # plus keyword arguments. + lazy_loader = factory('module name', 'module path', kw='kw') + loader = lazy_loader.loader + self.assertEqual(('module name', 'module path'), loader.args) + self.assertEqual({'kw': 'kw'}, loader.kwargs) + + def test_validation(self): + # No exec_module(), no lazy loading. + with self.assertRaises(TypeError): + util.LazyLoader.factory(object) + + +class TestingImporter(abc.MetaPathFinder, abc.Loader): + + module_name = 'lazy_loader_test' + mutated_name = 'changed' + loaded = None + load_count = 0 + source_code = 'attr = 42; __name__ = {!r}'.format(mutated_name) + + def find_spec(self, name, path, target=None): + if name != self.module_name: + return None + return util.spec_from_loader(name, util.LazyLoader(self)) + + def exec_module(self, module): + time.sleep(0.01) # Simulate a slow load. + exec(self.source_code, module.__dict__) + self.loaded = module + self.load_count += 1 + + +class LazyLoaderTests(unittest.TestCase): + + def test_init(self): + with self.assertRaises(TypeError): + # Classes that don't define exec_module() trigger TypeError. + util.LazyLoader(object) + + def new_module(self, source_code=None, loader=None): + if loader is None: + loader = TestingImporter() + if source_code is not None: + loader.source_code = source_code + spec = util.spec_from_loader(TestingImporter.module_name, + util.LazyLoader(loader)) + module = spec.loader.create_module(spec) + if module is None: + module = types.ModuleType(TestingImporter.module_name) + module.__spec__ = spec + module.__loader__ = spec.loader + spec.loader.exec_module(module) + # Module is now lazy. + self.assertIsNone(loader.loaded) + return module + + def test_e2e(self): + # End-to-end test to verify the load is in fact lazy. + importer = TestingImporter() + assert importer.loaded is None + with test_util.uncache(importer.module_name): + with test_util.import_state(meta_path=[importer]): + module = importlib.import_module(importer.module_name) + self.assertIsNone(importer.loaded) + # Trigger load. + self.assertEqual(module.__loader__, importer) + self.assertIsNotNone(importer.loaded) + self.assertEqual(module, importer.loaded) + + def test_attr_unchanged(self): + # An attribute only mutated as a side-effect of import should not be + # changed needlessly. + module = self.new_module() + self.assertEqual(TestingImporter.mutated_name, module.__name__) + + def test_new_attr(self): + # A new attribute should persist. + module = self.new_module() + module.new_attr = 42 + self.assertEqual(42, module.new_attr) + + def test_mutated_preexisting_attr(self): + # Changing an attribute that already existed on the module -- + # e.g. __name__ -- should persist. + module = self.new_module() + module.__name__ = 'bogus' + self.assertEqual('bogus', module.__name__) + + def test_mutated_attr(self): + # Changing an attribute that comes into existence after an import + # should persist. + module = self.new_module() + module.attr = 6 + self.assertEqual(6, module.attr) + + def test_delete_eventual_attr(self): + # Deleting an attribute should stay deleted. + module = self.new_module() + del module.attr + self.assertNotHasAttr(module, 'attr') + + def test_delete_preexisting_attr(self): + module = self.new_module() + del module.__name__ + self.assertNotHasAttr(module, '__name__') + + def test_module_substitution_error(self): + with test_util.uncache(TestingImporter.module_name): + fresh_module = types.ModuleType(TestingImporter.module_name) + sys.modules[TestingImporter.module_name] = fresh_module + module = self.new_module() + with self.assertRaisesRegex(ValueError, "substituted"): + module.__name__ + + def test_module_already_in_sys(self): + with test_util.uncache(TestingImporter.module_name): + module = self.new_module() + sys.modules[TestingImporter.module_name] = module + # Force the load; just care that no exception is raised. + module.__name__ + + @threading_helper.requires_working_threading() + def test_module_load_race(self): + with test_util.uncache(TestingImporter.module_name): + loader = TestingImporter() + module = self.new_module(loader=loader) + self.assertEqual(loader.load_count, 0) + + class RaisingThread(threading.Thread): + exc = None + def run(self): + try: + super().run() + except Exception as exc: + self.exc = exc + + def access_module(): + return module.attr + + threads = [] + for _ in range(2): + threads.append(thread := RaisingThread(target=access_module)) + thread.start() + + # Races could cause errors + for thread in threads: + thread.join() + self.assertIsNone(thread.exc) + + # Or multiple load attempts + self.assertEqual(loader.load_count, 1) + + def test_lazy_self_referential_modules(self): + # Directory modules with submodules that reference the parent can attempt to access + # the parent module during a load. Verify that this common pattern works with lazy loading. + # json is a good example in the stdlib. + json_modules = [name for name in sys.modules if name.startswith('json')] + with test_util.uncache(*json_modules): + # Standard lazy loading, unwrapped + spec = util.find_spec('json') + loader = util.LazyLoader(spec.loader) + spec.loader = loader + module = util.module_from_spec(spec) + sys.modules['json'] = module + loader.exec_module(module) + + # Trigger load with attribute lookup, ensure expected behavior + test_load = module.loads('{}') + self.assertEqual(test_load, {}) + + def test_lazy_module_type_override(self): + # Verify that lazy loading works with a module that modifies + # its __class__ to be a custom type. + + # Example module from PEP 726 + module = self.new_module(source_code="""\ +import sys +from types import ModuleType + +CONSTANT = 3.14 + +class ImmutableModule(ModuleType): + def __setattr__(self, name, value): + raise AttributeError('Read-only attribute!') + + def __delattr__(self, name): + raise AttributeError('Read-only attribute!') + +sys.modules[__name__].__class__ = ImmutableModule +""") + sys.modules[TestingImporter.module_name] = module + self.assertIsInstance(module, util._LazyModule) + self.assertEqual(module.CONSTANT, 3.14) + with self.assertRaises(AttributeError): + module.CONSTANT = 2.71 + with self.assertRaises(AttributeError): + del module.CONSTANT + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_locks.py b/stdlib/test/test_importlib/test_locks.py new file mode 100644 index 00000000..655e5881 --- /dev/null +++ b/stdlib/test/test_importlib/test_locks.py @@ -0,0 +1,161 @@ +from test.test_importlib import util as test_util + +init = test_util.import_importlib('importlib') + +import sys +import threading +import unittest +import weakref + +from test import support +from test.support import threading_helper +from test import lock_tests + + +threading_helper.requires_working_threading(module=True) + + +class ModuleLockAsRLockTests: + locktype = classmethod(lambda cls: cls.LockType("some_lock")) + + # _is_owned() unsupported + test__is_owned = None + # acquire(blocking=False) unsupported + test_try_acquire = None + test_try_acquire_contended = None + # `with` unsupported + test_with = None + # acquire(timeout=...) unsupported + test_timeout = None + # _release_save() unsupported + test_release_save_unacquired = None + # _recursion_count() unsupported + test_recursion_count = None + # lock status in repr unsupported + test_repr = None + test_locked_repr = None + test_repr_count = None + + def tearDown(self): + for splitinit in init.values(): + splitinit._bootstrap._blocking_on.clear() + + +LOCK_TYPES = {kind: splitinit._bootstrap._ModuleLock + for kind, splitinit in init.items()} + +(Frozen_ModuleLockAsRLockTests, + Source_ModuleLockAsRLockTests + ) = test_util.test_both(ModuleLockAsRLockTests, lock_tests.RLockTests, + LockType=LOCK_TYPES) + + +class DeadlockAvoidanceTests: + + def setUp(self): + try: + self.old_switchinterval = sys.getswitchinterval() + support.setswitchinterval(0.000001) + except AttributeError: + self.old_switchinterval = None + + def tearDown(self): + if self.old_switchinterval is not None: + sys.setswitchinterval(self.old_switchinterval) + + def run_deadlock_avoidance_test(self, create_deadlock): + NLOCKS = 10 + locks = [self.LockType(str(i)) for i in range(NLOCKS)] + pairs = [(locks[i], locks[(i+1)%NLOCKS]) for i in range(NLOCKS)] + if create_deadlock: + NTHREADS = NLOCKS + else: + NTHREADS = NLOCKS - 1 + barrier = threading.Barrier(NTHREADS) + results = [] + + def _acquire(lock): + """Try to acquire the lock. Return True on success, + False on deadlock.""" + try: + lock.acquire() + except self.DeadlockError: + return False + else: + return True + + def f(): + a, b = pairs.pop() + ra = _acquire(a) + barrier.wait() + rb = _acquire(b) + results.append((ra, rb)) + if rb: + b.release() + if ra: + a.release() + with lock_tests.Bunch(f, NTHREADS): + pass + self.assertEqual(len(results), NTHREADS) + return results + + def test_deadlock(self): + results = self.run_deadlock_avoidance_test(True) + # At least one of the threads detected a potential deadlock on its + # second acquire() call. It may be several of them, because the + # deadlock avoidance mechanism is conservative. + nb_deadlocks = results.count((True, False)) + self.assertGreaterEqual(nb_deadlocks, 1) + self.assertEqual(results.count((True, True)), len(results) - nb_deadlocks) + + def test_no_deadlock(self): + results = self.run_deadlock_avoidance_test(False) + self.assertEqual(results.count((True, False)), 0) + self.assertEqual(results.count((True, True)), len(results)) + + +DEADLOCK_ERRORS = {kind: splitinit._bootstrap._DeadlockError + for kind, splitinit in init.items()} + +(Frozen_DeadlockAvoidanceTests, + Source_DeadlockAvoidanceTests + ) = test_util.test_both(DeadlockAvoidanceTests, + LockType=LOCK_TYPES, + DeadlockError=DEADLOCK_ERRORS) + + +class LifetimeTests: + + @property + def bootstrap(self): + return self.init._bootstrap + + def test_lock_lifetime(self): + name = "xyzzy" + self.assertNotIn(name, self.bootstrap._module_locks) + lock = self.bootstrap._get_module_lock(name) + self.assertIn(name, self.bootstrap._module_locks) + wr = weakref.ref(lock) + del lock + support.gc_collect() + self.assertNotIn(name, self.bootstrap._module_locks) + self.assertIsNone(wr()) + + def test_all_locks(self): + support.gc_collect() + self.assertEqual(0, len(self.bootstrap._module_locks), + self.bootstrap._module_locks) + + +(Frozen_LifetimeTests, + Source_LifetimeTests + ) = test_util.test_both(LifetimeTests, init=init) + + +def setUpModule(): + thread_info = threading_helper.threading_setup() + unittest.addModuleCleanup(threading_helper.threading_cleanup, *thread_info) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_namespace_pkgs.py b/stdlib/test/test_importlib/test_namespace_pkgs.py new file mode 100644 index 00000000..6ca0978f --- /dev/null +++ b/stdlib/test/test_importlib/test_namespace_pkgs.py @@ -0,0 +1,379 @@ +import contextlib +import importlib +import importlib.abc +import importlib.machinery +import os +import sys +import tempfile +import unittest + +from test.test_importlib import util + +# needed tests: +# +# need to test when nested, so that the top-level path isn't sys.path +# need to test dynamic path detection, both at top-level and nested +# with dynamic path, check when a loader is returned on path reload (that is, +# trying to switch from a namespace package to a regular package) + + +@contextlib.contextmanager +def sys_modules_context(): + """ + Make sure sys.modules is the same object and has the same content + when exiting the context as when entering. + + Similar to importlib.test.util.uncache, but doesn't require explicit + names. + """ + sys_modules_saved = sys.modules + sys_modules_copy = sys.modules.copy() + try: + yield + finally: + sys.modules = sys_modules_saved + sys.modules.clear() + sys.modules.update(sys_modules_copy) + + +@contextlib.contextmanager +def namespace_tree_context(**kwargs): + """ + Save import state and sys.modules cache and restore it on exit. + Typical usage: + + >>> with namespace_tree_context(path=['/tmp/xxyy/portion1', + ... '/tmp/xxyy/portion2']): + ... pass + """ + # use default meta_path and path_hooks unless specified otherwise + kwargs.setdefault('meta_path', sys.meta_path) + kwargs.setdefault('path_hooks', sys.path_hooks) + import_context = util.import_state(**kwargs) + with import_context, sys_modules_context(): + yield + +class NamespacePackageTest(unittest.TestCase): + """ + Subclasses should define self.root and self.paths (under that root) + to be added to sys.path. + """ + root = os.path.join(os.path.dirname(__file__), 'namespace_pkgs') + + def setUp(self): + self.resolved_paths = [ + os.path.join(self.root, path) for path in self.paths + ] + self.enterContext(namespace_tree_context(path=self.resolved_paths)) + + +class SingleNamespacePackage(NamespacePackageTest): + paths = ['portion1'] + + def test_simple_package(self): + import foo.one + self.assertEqual(foo.one.attr, 'portion1 foo one') + + def test_cant_import_other(self): + with self.assertRaises(ImportError): + import foo.two + + def test_simple_repr(self): + import foo.one + self.assertStartsWith(repr(foo), "' + + def __getattr__(self, name): + if name == 'get_filename' and self.path is not None: + return self._get_filename + if name == 'is_package': + return self._is_package + raise AttributeError(name) + + def _get_filename(self, name): + return self.path + + def _is_package(self, name): + return self.package + + def create_module(self, spec): + return None + + +class NewLoader(TestLoader): + + EGGS = 1 + + def exec_module(self, module): + module.eggs = self.EGGS + + +class ModuleSpecTests: + + def setUp(self): + self.name = 'spam' + self.path = 'spam.py' + self.cached = self.util.cache_from_source(self.path) + self.loader = TestLoader() + self.spec = self.machinery.ModuleSpec(self.name, self.loader) + self.loc_spec = self.machinery.ModuleSpec(self.name, self.loader, + origin=self.path) + self.loc_spec._set_fileattr = True + + def test_default(self): + spec = self.machinery.ModuleSpec(self.name, self.loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_default_no_loader(self): + spec = self.machinery.ModuleSpec(self.name, None) + + self.assertEqual(spec.name, self.name) + self.assertIs(spec.loader, None) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_default_is_package_false(self): + spec = self.machinery.ModuleSpec(self.name, self.loader, + is_package=False) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_default_is_package_true(self): + spec = self.machinery.ModuleSpec(self.name, self.loader, + is_package=True) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertEqual(spec.submodule_search_locations, []) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_has_location_setter(self): + spec = self.machinery.ModuleSpec(self.name, self.loader, + origin='somewhere') + self.assertFalse(spec.has_location) + spec.has_location = True + self.assertTrue(spec.has_location) + + def test_equality(self): + other = type(sys.implementation)(name=self.name, + loader=self.loader, + origin=None, + submodule_search_locations=None, + has_location=False, + cached=None, + ) + + self.assertTrue(self.spec == other) + + def test_equality_location(self): + other = type(sys.implementation)(name=self.name, + loader=self.loader, + origin=self.path, + submodule_search_locations=None, + has_location=True, + cached=self.cached, + ) + + self.assertEqual(self.loc_spec, other) + + def test_inequality(self): + other = type(sys.implementation)(name='ham', + loader=self.loader, + origin=None, + submodule_search_locations=None, + has_location=False, + cached=None, + ) + + self.assertNotEqual(self.spec, other) + + def test_inequality_incomplete(self): + other = type(sys.implementation)(name=self.name, + loader=self.loader, + ) + + self.assertNotEqual(self.spec, other) + + def test_package(self): + spec = self.machinery.ModuleSpec('spam.eggs', self.loader) + + self.assertEqual(spec.parent, 'spam') + + def test_package_is_package(self): + spec = self.machinery.ModuleSpec('spam.eggs', self.loader, + is_package=True) + + self.assertEqual(spec.parent, 'spam.eggs') + + # cached + + def test_cached_set(self): + before = self.spec.cached + self.spec.cached = 'there' + after = self.spec.cached + + self.assertIs(before, None) + self.assertEqual(after, 'there') + + def test_cached_no_origin(self): + spec = self.machinery.ModuleSpec(self.name, self.loader) + + self.assertIs(spec.cached, None) + + def test_cached_with_origin_not_location(self): + spec = self.machinery.ModuleSpec(self.name, self.loader, + origin=self.path) + + self.assertIs(spec.cached, None) + + def test_cached_source(self): + expected = self.util.cache_from_source(self.path) + + self.assertEqual(self.loc_spec.cached, expected) + + def test_cached_source_unknown_suffix(self): + self.loc_spec.origin = 'spam.spamspamspam' + + self.assertIs(self.loc_spec.cached, None) + + def test_cached_source_missing_cache_tag(self): + original = sys.implementation.cache_tag + sys.implementation.cache_tag = None + try: + cached = self.loc_spec.cached + finally: + sys.implementation.cache_tag = original + + self.assertIs(cached, None) + + def test_cached_sourceless(self): + self.loc_spec.origin = 'spam.pyc' + + self.assertEqual(self.loc_spec.cached, 'spam.pyc') + + +(Frozen_ModuleSpecTests, + Source_ModuleSpecTests + ) = test_util.test_both(ModuleSpecTests, util=util, machinery=machinery) + + +class ModuleSpecMethodsTests: + + @property + def bootstrap(self): + return self.init._bootstrap + + def setUp(self): + self.name = 'spam' + self.path = 'spam.py' + self.cached = self.util.cache_from_source(self.path) + self.loader = TestLoader() + self.spec = self.machinery.ModuleSpec(self.name, self.loader) + self.loc_spec = self.machinery.ModuleSpec(self.name, self.loader, + origin=self.path) + self.loc_spec._set_fileattr = True + + # exec() + + def test_exec(self): + self.spec.loader = NewLoader() + module = self.util.module_from_spec(self.spec) + sys.modules[self.name] = module + self.assertNotHasAttr(module, 'eggs') + self.bootstrap._exec(self.spec, module) + + self.assertEqual(module.eggs, 1) + + # load() + + def test_load(self): + self.spec.loader = NewLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + installed = sys.modules[self.spec.name] + + self.assertEqual(loaded.eggs, 1) + self.assertIs(loaded, installed) + + def test_load_replaced(self): + replacement = object() + class ReplacingLoader(TestLoader): + def exec_module(self, module): + sys.modules[module.__name__] = replacement + self.spec.loader = ReplacingLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + installed = sys.modules[self.spec.name] + + self.assertIs(loaded, replacement) + self.assertIs(installed, replacement) + + def test_load_failed(self): + class FailedLoader(TestLoader): + def exec_module(self, module): + raise RuntimeError + self.spec.loader = FailedLoader() + with CleanImport(self.spec.name): + with self.assertRaises(RuntimeError): + loaded = self.bootstrap._load(self.spec) + self.assertNotIn(self.spec.name, sys.modules) + + def test_load_failed_removed(self): + class FailedLoader(TestLoader): + def exec_module(self, module): + del sys.modules[module.__name__] + raise RuntimeError + self.spec.loader = FailedLoader() + with CleanImport(self.spec.name): + with self.assertRaises(RuntimeError): + loaded = self.bootstrap._load(self.spec) + self.assertNotIn(self.spec.name, sys.modules) + + def test_load_legacy_attributes_immutable(self): + module = object() + with warnings.catch_warnings(): + warnings.simplefilter("ignore", ImportWarning) + class ImmutableLoader(TestLoader): + def load_module(self, name): + sys.modules[name] = module + return module + self.spec.loader = ImmutableLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + + self.assertIs(sys.modules[self.spec.name], module) + + # reload() + + def test_reload(self): + self.spec.loader = NewLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + reloaded = self.bootstrap._exec(self.spec, loaded) + installed = sys.modules[self.spec.name] + + self.assertEqual(loaded.eggs, 1) + self.assertIs(reloaded, loaded) + self.assertIs(installed, loaded) + + def test_reload_modified(self): + self.spec.loader = NewLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + loaded.eggs = 2 + reloaded = self.bootstrap._exec(self.spec, loaded) + + self.assertEqual(loaded.eggs, 1) + self.assertIs(reloaded, loaded) + + def test_reload_extra_attributes(self): + self.spec.loader = NewLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + loaded.available = False + reloaded = self.bootstrap._exec(self.spec, loaded) + + self.assertFalse(loaded.available) + self.assertIs(reloaded, loaded) + + def test_reload_init_module_attrs(self): + self.spec.loader = NewLoader() + with CleanImport(self.spec.name): + loaded = self.bootstrap._load(self.spec) + loaded.__name__ = 'ham' + del loaded.__loader__ + del loaded.__package__ + del loaded.__spec__ + self.bootstrap._exec(self.spec, loaded) + + self.assertEqual(loaded.__name__, self.spec.name) + self.assertIs(loaded.__loader__, self.spec.loader) + self.assertEqual(loaded.__package__, self.spec.parent) + self.assertIs(loaded.__spec__, self.spec) + self.assertNotHasAttr(loaded, '__path__') + self.assertNotHasAttr(loaded, '__file__') + self.assertNotHasAttr(loaded, '__cached__') + + +(Frozen_ModuleSpecMethodsTests, + Source_ModuleSpecMethodsTests + ) = test_util.test_both(ModuleSpecMethodsTests, init=init, util=util, + machinery=machinery) + + +class FactoryTests: + + def setUp(self): + self.name = 'spam' + self.path = os.path.abspath('spam.py') + self.cached = self.util.cache_from_source(self.path) + self.loader = TestLoader() + self.fileloader = TestLoader(self.path) + self.pkgloader = TestLoader(self.path, True) + + # spec_from_loader() + + def test_spec_from_loader_default(self): + spec = self.util.spec_from_loader(self.name, self.loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_default_with_bad_is_package(self): + class Loader: + def is_package(self, name): + raise ImportError + loader = Loader() + spec = self.util.spec_from_loader(self.name, loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_origin(self): + origin = 'somewhere over the rainbow' + spec = self.util.spec_from_loader(self.name, self.loader, + origin=origin) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, origin) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_is_package_false(self): + spec = self.util.spec_from_loader(self.name, self.loader, + is_package=False) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_is_package_true(self): + spec = self.util.spec_from_loader(self.name, self.loader, + is_package=True) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertEqual(spec.submodule_search_locations, []) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_origin_and_is_package(self): + origin = 'where the streets have no name' + spec = self.util.spec_from_loader(self.name, self.loader, + origin=origin, is_package=True) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertIs(spec.origin, origin) + self.assertIs(spec.loader_state, None) + self.assertEqual(spec.submodule_search_locations, []) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_is_package_with_loader_false(self): + loader = TestLoader(is_package=False) + spec = self.util.spec_from_loader(self.name, loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_is_package_with_loader_true(self): + loader = TestLoader(is_package=True) + spec = self.util.spec_from_loader(self.name, loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, loader) + self.assertIs(spec.origin, None) + self.assertIs(spec.loader_state, None) + self.assertEqual(spec.submodule_search_locations, []) + self.assertIs(spec.cached, None) + self.assertFalse(spec.has_location) + + def test_spec_from_loader_default_with_file_loader(self): + spec = self.util.spec_from_loader(self.name, self.fileloader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_loader_is_package_false_with_fileloader(self): + spec = self.util.spec_from_loader(self.name, self.fileloader, + is_package=False) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_loader_is_package_true_with_fileloader(self): + spec = self.util.spec_from_loader(self.name, self.fileloader, + is_package=True) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + location = cwd if (cwd := os.getcwd()) != '/' else '' + self.assertEqual(spec.submodule_search_locations, [location]) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + # spec_from_file_location() + + def test_spec_from_file_location_default(self): + spec = self.util.spec_from_file_location(self.name, self.path) + + self.assertEqual(spec.name, self.name) + # Need to use a circuitous route to get at importlib.machinery to make + # sure the same class object is used in the isinstance() check as + # would have been used to create the loader. + SourceFileLoader = self.util.spec_from_file_location.__globals__['SourceFileLoader'] + self.assertIsInstance(spec.loader, SourceFileLoader) + self.assertEqual(spec.loader.name, self.name) + self.assertEqual(spec.loader.path, self.path) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_path_like_arg(self): + spec = self.util.spec_from_file_location(self.name, + pathlib.PurePath(self.path)) + self.assertEqual(spec.origin, self.path) + + def test_spec_from_file_location_default_without_location(self): + spec = self.util.spec_from_file_location(self.name) + + self.assertIs(spec, None) + + def test_spec_from_file_location_default_bad_suffix(self): + spec = self.util.spec_from_file_location(self.name, 'spam.eggs') + + self.assertIs(spec, None) + + def test_spec_from_file_location_loader_no_location(self): + spec = self.util.spec_from_file_location(self.name, + loader=self.fileloader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_loader_no_location_no_get_filename(self): + spec = self.util.spec_from_file_location(self.name, + loader=self.loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.loader) + self.assertEqual(spec.origin, '') + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_loader_no_location_bad_get_filename(self): + class Loader: + def get_filename(self, name): + raise ImportError + loader = Loader() + spec = self.util.spec_from_file_location(self.name, loader=loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, loader) + self.assertEqual(spec.origin, '') + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertIs(spec.cached, None) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_none(self): + spec = self.util.spec_from_file_location(self.name, self.path, + loader=self.fileloader, + submodule_search_locations=None) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_empty(self): + spec = self.util.spec_from_file_location(self.name, self.path, + loader=self.fileloader, + submodule_search_locations=[]) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + location = cwd if (cwd := os.getcwd()) != '/' else '' + self.assertEqual(spec.submodule_search_locations, [location]) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_not_empty(self): + spec = self.util.spec_from_file_location(self.name, self.path, + loader=self.fileloader, + submodule_search_locations=['eggs']) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertEqual(spec.submodule_search_locations, ['eggs']) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_default(self): + spec = self.util.spec_from_file_location(self.name, self.path, + loader=self.pkgloader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.pkgloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + location = cwd if (cwd := os.getcwd()) != '/' else '' + self.assertEqual(spec.submodule_search_locations, [location]) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_default_not_package(self): + class Loader: + def is_package(self, name): + return False + loader = Loader() + spec = self.util.spec_from_file_location(self.name, self.path, + loader=loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, loader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_default_no_is_package(self): + spec = self.util.spec_from_file_location(self.name, self.path, + loader=self.fileloader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_smsl_default_bad_is_package(self): + class Loader: + def is_package(self, name): + raise ImportError + loader = Loader() + spec = self.util.spec_from_file_location(self.name, self.path, + loader=loader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, loader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + + def test_spec_from_file_location_relative_path(self): + spec = self.util.spec_from_file_location(self.name, + os.path.basename(self.path), loader=self.fileloader) + + self.assertEqual(spec.name, self.name) + self.assertEqual(spec.loader, self.fileloader) + self.assertEqual(spec.origin, self.path) + self.assertIs(spec.loader_state, None) + self.assertIs(spec.submodule_search_locations, None) + self.assertEqual(spec.cached, self.cached) + self.assertTrue(spec.has_location) + +(Frozen_FactoryTests, + Source_FactoryTests + ) = test_util.test_both(FactoryTests, util=util, machinery=machinery) + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_threaded_import.py b/stdlib/test/test_importlib/test_threaded_import.py new file mode 100644 index 00000000..8b793ebf --- /dev/null +++ b/stdlib/test/test_importlib/test_threaded_import.py @@ -0,0 +1,340 @@ +# This is a variant of the very old (early 90's) file +# Demo/threads/bug.py. It simply provokes a number of threads into +# trying to import the same module "at the same time". +# There are no pleasant failure modes -- most likely is that Python +# complains several times about module random having no attribute +# randrange, and then Python hangs. + +import _imp as imp +import os +import importlib +import sys +import time +import shutil +import threading +import unittest +from test import support +from test.support import verbose +from test.support.import_helper import forget, mock_register_at_fork +from test.support.os_helper import (TESTFN, unlink, rmtree) +from test.support import script_helper, threading_helper + +threading_helper.requires_working_threading(module=True) + +def task(N, done, done_tasks, errors): + try: + # We don't use modulefinder but still import it in order to stress + # importing of different modules from several threads. + if len(done_tasks) % 2: + import modulefinder + import random + else: + import random + import modulefinder + # This will fail if random is not completely initialized + x = random.randrange(1, 3) + except Exception as e: + errors.append(e.with_traceback(None)) + finally: + done_tasks.append(threading.get_ident()) + finished = len(done_tasks) == N + if finished: + done.set() + +# Create a circular import structure: A -> C -> B -> D -> A +# NOTE: `time` is already loaded and therefore doesn't threaten to deadlock. + +circular_imports_modules = { + 'A': """if 1: + import time + time.sleep(%(delay)s) + x = 'a' + import C + """, + 'B': """if 1: + import time + time.sleep(%(delay)s) + x = 'b' + import D + """, + 'C': """import B""", + 'D': """import A""", +} + +class Finder: + """A dummy finder to detect concurrent access to its find_spec() + method.""" + + def __init__(self): + self.numcalls = 0 + self.x = 0 + self.lock = threading.Lock() + + def find_spec(self, name, path=None, target=None): + # Simulate some thread-unsafe behaviour. If calls to find_spec() + # are properly serialized, `x` will end up the same as `numcalls`. + # Otherwise not. + assert imp.lock_held() + with self.lock: + self.numcalls += 1 + x = self.x + time.sleep(0.01) + self.x = x + 1 + +class FlushingFinder: + """A dummy finder which flushes sys.path_importer_cache when it gets + called.""" + + def find_spec(self, name, path=None, target=None): + sys.path_importer_cache.clear() + + +class ThreadedImportTests(unittest.TestCase): + + def setUp(self): + self.old_random = sys.modules.pop('random', None) + + def tearDown(self): + # If the `random` module was already initialized, we restore the + # old module at the end so that pickling tests don't fail. + # See http://bugs.python.org/issue3657#msg110461 + if self.old_random is not None: + sys.modules['random'] = self.old_random + + @mock_register_at_fork + def check_parallel_module_init(self, mock_os): + if imp.lock_held(): + # This triggers on, e.g., from test import autotest. + raise unittest.SkipTest("can't run when import lock is held") + + done = threading.Event() + for N in (20, 50) * 3: + if verbose: + print("Trying", N, "threads ...", end=' ') + # Make sure that random and modulefinder get reimported freshly + for modname in ['random', 'modulefinder']: + try: + del sys.modules[modname] + except KeyError: + pass + errors = [] + done_tasks = [] + done.clear() + t0 = time.monotonic() + with threading_helper.start_threads( + threading.Thread(target=task, args=(N, done, done_tasks, errors,)) + for i in range(N)): + pass + completed = done.wait(10 * 60) + dt = time.monotonic() - t0 + if verbose: + print("%.1f ms" % (dt*1e3), flush=True, end=" ") + dbg_info = 'done: %s/%s' % (len(done_tasks), N) + self.assertFalse(errors, dbg_info) + self.assertTrue(completed, dbg_info) + if verbose: + print("OK.") + + @support.bigmemtest(size=50, memuse=76*2**20, dry_run=False) + def test_parallel_module_init(self, size): + self.check_parallel_module_init() + + @support.bigmemtest(size=50, memuse=76*2**20, dry_run=False) + def test_parallel_meta_path(self, size): + finder = Finder() + sys.meta_path.insert(0, finder) + try: + self.check_parallel_module_init() + self.assertGreater(finder.numcalls, 0) + self.assertEqual(finder.x, finder.numcalls) + finally: + sys.meta_path.remove(finder) + + @support.bigmemtest(size=50, memuse=76*2**20, dry_run=False) + def test_parallel_path_hooks(self, size): + # Here the Finder instance is only used to check concurrent calls + # to path_hook(). + finder = Finder() + # In order for our path hook to be called at each import, we need + # to flush the path_importer_cache, which we do by registering a + # dedicated meta_path entry. + flushing_finder = FlushingFinder() + def path_hook(path): + finder.find_spec('') + raise ImportError + sys.path_hooks.insert(0, path_hook) + sys.meta_path.append(flushing_finder) + try: + # Flush the cache a first time + flushing_finder.find_spec('') + numtests = self.check_parallel_module_init() + self.assertGreater(finder.numcalls, 0) + self.assertEqual(finder.x, finder.numcalls) + finally: + sys.meta_path.remove(flushing_finder) + sys.path_hooks.remove(path_hook) + + def test_import_hangers(self): + # In case this test is run again, make sure the helper module + # gets loaded from scratch again. + try: + del sys.modules['test.test_importlib.threaded_import_hangers'] + except KeyError: + pass + import test.test_importlib.threaded_import_hangers + self.assertFalse(test.test_importlib.threaded_import_hangers.errors) + + def test_circular_imports(self): + # The goal of this test is to exercise implementations of the import + # lock which use a per-module lock, rather than a global lock. + # In these implementations, there is a possible deadlock with + # circular imports, for example: + # - thread 1 imports A (grabbing the lock for A) which imports B + # - thread 2 imports B (grabbing the lock for B) which imports A + # Such implementations should be able to detect such situations and + # resolve them one way or the other, without freezing. + # NOTE: our test constructs a slightly less trivial import cycle, + # in order to better stress the deadlock avoidance mechanism. + delay = 0.5 + os.mkdir(TESTFN) + self.addCleanup(shutil.rmtree, TESTFN) + sys.path.insert(0, TESTFN) + self.addCleanup(sys.path.remove, TESTFN) + for name, contents in circular_imports_modules.items(): + contents = contents % {'delay': delay} + with open(os.path.join(TESTFN, name + ".py"), "wb") as f: + f.write(contents.encode('utf-8')) + self.addCleanup(forget, name) + + importlib.invalidate_caches() + results = [] + def import_ab(): + import A + results.append(getattr(A, 'x', None)) + def import_ba(): + import B + results.append(getattr(B, 'x', None)) + t1 = threading.Thread(target=import_ab) + t2 = threading.Thread(target=import_ba) + t1.start() + t2.start() + t1.join() + t2.join() + self.assertEqual(set(results), {'a', 'b'}) + + @mock_register_at_fork + def test_side_effect_import(self, mock_os): + code = """if 1: + import threading + def target(): + import random + t = threading.Thread(target=target) + t.start() + t.join() + t = None""" + sys.path.insert(0, os.curdir) + self.addCleanup(sys.path.remove, os.curdir) + filename = TESTFN + ".py" + with open(filename, "wb") as f: + f.write(code.encode('utf-8')) + self.addCleanup(unlink, filename) + self.addCleanup(forget, TESTFN) + self.addCleanup(rmtree, '__pycache__') + importlib.invalidate_caches() + with threading_helper.wait_threads_exit(): + __import__(TESTFN) + del sys.modules[TESTFN] + + @support.bigmemtest(size=1, memuse=1.8*2**30, dry_run=False) + def test_concurrent_futures_circular_import(self, size): + # Regression test for bpo-43515 + fn = os.path.join(os.path.dirname(__file__), + 'partial', 'cfimport.py') + script_helper.assert_python_ok(fn) + + @support.bigmemtest(size=1, memuse=1.8*2**30, dry_run=False) + def test_multiprocessing_pool_circular_import(self, size): + # Regression test for bpo-41567 + fn = os.path.join(os.path.dirname(__file__), + 'partial', 'pool_in_threads.py') + script_helper.assert_python_ok(fn) + + def test_import_failure_race_condition(self): + # Regression test for race condition where a thread could receive + # a partially-initialized module when another thread's import fails. + # The race occurs when: + # 1. Thread 1 starts importing, adds module to sys.modules + # 2. Thread 2 sees the module in sys.modules + # 3. Thread 1's import fails, removes module from sys.modules + # 4. Thread 2 should NOT return the stale module reference + os.mkdir(TESTFN) + self.addCleanup(shutil.rmtree, TESTFN) + sys.path.insert(0, TESTFN) + self.addCleanup(sys.path.remove, TESTFN) + + # Create a module that partially initializes then fails + modname = 'failing_import_module' + with open(os.path.join(TESTFN, modname + '.py'), 'w') as f: + f.write(''' +import time +PARTIAL_ATTR = 'initialized' +time.sleep(0.05) # Widen race window +raise RuntimeError("Intentional import failure") +''') + self.addCleanup(forget, modname) + importlib.invalidate_caches() + + errors = [] + results = [] + + def do_import(delay=0): + time.sleep(delay) + try: + mod = __import__(modname) + # If we got a module, verify it's in sys.modules + if modname not in sys.modules: + errors.append( + f"Got module {mod!r} but {modname!r} not in sys.modules" + ) + elif sys.modules[modname] is not mod: + errors.append( + f"Got different module than sys.modules[{modname!r}]" + ) + else: + results.append(('success', mod)) + except RuntimeError: + results.append(('RuntimeError',)) + except Exception as e: + errors.append(f"Unexpected exception: {e}") + + # Run multiple iterations to increase chance of hitting the race + for _ in range(10): + errors.clear() + results.clear() + if modname in sys.modules: + del sys.modules[modname] + + t1 = threading.Thread(target=do_import, args=(0,)) + t2 = threading.Thread(target=do_import, args=(0.01,)) + t1.start() + t2.start() + t1.join() + t2.join() + + # Neither thread should have errors about stale modules + self.assertEqual(errors, [], f"Race condition detected: {errors}") + + +def setUpModule(): + thread_info = threading_helper.threading_setup() + unittest.addModuleCleanup(threading_helper.threading_cleanup, *thread_info) + try: + old_switchinterval = sys.getswitchinterval() + unittest.addModuleCleanup(sys.setswitchinterval, old_switchinterval) + support.setswitchinterval(1e-5) + except AttributeError: + pass + + +if __name__ == "__main__": + unittest.main() diff --git a/stdlib/test/test_importlib/test_util.py b/stdlib/test/test_importlib/test_util.py new file mode 100644 index 00000000..8c14b962 --- /dev/null +++ b/stdlib/test/test_importlib/test_util.py @@ -0,0 +1,861 @@ +from test.test_importlib import util + +abc = util.import_importlib('importlib.abc') +init = util.import_importlib('importlib') +machinery = util.import_importlib('importlib.machinery') +importlib_util = util.import_importlib('importlib.util') + +import importlib.util +from importlib import _bootstrap_external +import os +import pathlib +import string +import sys +from test import support +from test.support import os_helper +import textwrap +import types +import unittest +import unittest.mock +import warnings + +try: + import _testsinglephase +except ImportError: + _testsinglephase = None +try: + import _testmultiphase +except ImportError: + _testmultiphase = None +try: + import _interpreters +except ModuleNotFoundError: + _interpreters = None + + +class DecodeSourceBytesTests: + + source = "string ='ü'" + + def test_ut8_default(self): + source_bytes = self.source.encode('utf-8') + self.assertEqual(self.util.decode_source(source_bytes), self.source) + + def test_specified_encoding(self): + source = '# coding=latin-1\n' + self.source + source_bytes = source.encode('latin-1') + assert source_bytes != source.encode('utf-8') + self.assertEqual(self.util.decode_source(source_bytes), source) + + def test_universal_newlines(self): + source = '\r\n'.join([self.source, self.source]) + source_bytes = source.encode('utf-8') + self.assertEqual(self.util.decode_source(source_bytes), + '\n'.join([self.source, self.source])) + + +(Frozen_DecodeSourceBytesTests, + Source_DecodeSourceBytesTests + ) = util.test_both(DecodeSourceBytesTests, util=importlib_util) + + +class ModuleFromSpecTests: + + def test_no_create_module(self): + class Loader: + def exec_module(self, module): + pass + spec = self.machinery.ModuleSpec('test', Loader()) + with self.assertRaises(ImportError): + module = self.util.module_from_spec(spec) + + def test_create_module_returns_None(self): + class Loader(self.abc.Loader): + def create_module(self, spec): + return None + spec = self.machinery.ModuleSpec('test', Loader()) + module = self.util.module_from_spec(spec) + self.assertIsInstance(module, types.ModuleType) + self.assertEqual(module.__name__, spec.name) + + def test_create_module(self): + name = 'already set' + class CustomModule(types.ModuleType): + pass + class Loader(self.abc.Loader): + def create_module(self, spec): + module = CustomModule(spec.name) + module.__name__ = name + return module + spec = self.machinery.ModuleSpec('test', Loader()) + module = self.util.module_from_spec(spec) + self.assertIsInstance(module, CustomModule) + self.assertEqual(module.__name__, name) + + def test___name__(self): + spec = self.machinery.ModuleSpec('test', object()) + module = self.util.module_from_spec(spec) + self.assertEqual(module.__name__, spec.name) + + def test___spec__(self): + spec = self.machinery.ModuleSpec('test', object()) + module = self.util.module_from_spec(spec) + self.assertEqual(module.__spec__, spec) + + def test___loader__(self): + loader = object() + spec = self.machinery.ModuleSpec('test', loader) + module = self.util.module_from_spec(spec) + self.assertIs(module.__loader__, loader) + + def test___package__(self): + spec = self.machinery.ModuleSpec('test.pkg', object()) + module = self.util.module_from_spec(spec) + self.assertEqual(module.__package__, spec.parent) + + def test___path__(self): + spec = self.machinery.ModuleSpec('test', object(), is_package=True) + module = self.util.module_from_spec(spec) + self.assertEqual(module.__path__, spec.submodule_search_locations) + + def test___file__(self): + spec = self.machinery.ModuleSpec('test', object(), origin='some/path') + spec.has_location = True + module = self.util.module_from_spec(spec) + self.assertEqual(module.__file__, spec.origin) + + def test___cached__(self): + spec = self.machinery.ModuleSpec('test', object()) + spec.cached = 'some/path' + spec.has_location = True + module = self.util.module_from_spec(spec) + self.assertEqual(module.__cached__, spec.cached) + +(Frozen_ModuleFromSpecTests, + Source_ModuleFromSpecTests +) = util.test_both(ModuleFromSpecTests, abc=abc, machinery=machinery, + util=importlib_util) + + +class ResolveNameTests: + + """Tests importlib.util.resolve_name().""" + + def test_absolute(self): + # bacon + self.assertEqual('bacon', self.util.resolve_name('bacon', None)) + + def test_absolute_within_package(self): + # bacon in spam + self.assertEqual('bacon', self.util.resolve_name('bacon', 'spam')) + + def test_no_package(self): + # .bacon in '' + with self.assertRaises(ImportError): + self.util.resolve_name('.bacon', '') + + def test_in_package(self): + # .bacon in spam + self.assertEqual('spam.eggs.bacon', + self.util.resolve_name('.bacon', 'spam.eggs')) + + def test_other_package(self): + # ..bacon in spam.bacon + self.assertEqual('spam.bacon', + self.util.resolve_name('..bacon', 'spam.eggs')) + + def test_escape(self): + # ..bacon in spam + with self.assertRaises(ImportError): + self.util.resolve_name('..bacon', 'spam') + + +(Frozen_ResolveNameTests, + Source_ResolveNameTests + ) = util.test_both(ResolveNameTests, util=importlib_util) + + +class FindSpecTests: + + class FakeMetaFinder: + @staticmethod + def find_spec(name, path=None, target=None): return name, path, target + + def test_sys_modules(self): + name = 'some_mod' + with util.uncache(name): + module = types.ModuleType(name) + loader = 'a loader!' + spec = self.machinery.ModuleSpec(name, loader) + module.__loader__ = loader + module.__spec__ = spec + sys.modules[name] = module + found = self.util.find_spec(name) + self.assertEqual(found, spec) + + def test_sys_modules_without___loader__(self): + name = 'some_mod' + with util.uncache(name): + module = types.ModuleType(name) + del module.__loader__ + loader = 'a loader!' + spec = self.machinery.ModuleSpec(name, loader) + module.__spec__ = spec + sys.modules[name] = module + found = self.util.find_spec(name) + self.assertEqual(found, spec) + + def test_sys_modules_spec_is_None(self): + name = 'some_mod' + with util.uncache(name): + module = types.ModuleType(name) + module.__spec__ = None + sys.modules[name] = module + with self.assertRaises(ValueError): + self.util.find_spec(name) + + def test_sys_modules_loader_is_None(self): + name = 'some_mod' + with util.uncache(name): + module = types.ModuleType(name) + spec = self.machinery.ModuleSpec(name, None) + module.__spec__ = spec + sys.modules[name] = module + found = self.util.find_spec(name) + self.assertEqual(found, spec) + + def test_sys_modules_spec_is_not_set(self): + name = 'some_mod' + with util.uncache(name): + module = types.ModuleType(name) + try: + del module.__spec__ + except AttributeError: + pass + sys.modules[name] = module + with self.assertRaises(ValueError): + self.util.find_spec(name) + + def test_success(self): + name = 'some_mod' + with util.uncache(name): + with util.import_state(meta_path=[self.FakeMetaFinder]): + self.assertEqual((name, None, None), + self.util.find_spec(name)) + + def test_nothing(self): + # None is returned upon failure to find a loader. + self.assertIsNone(self.util.find_spec('nevergoingtofindthismodule')) + + def test_find_submodule(self): + name = 'spam' + subname = 'ham' + with util.temp_module(name, pkg=True) as pkg_dir: + fullname, _ = util.submodule(name, subname, pkg_dir) + spec = self.util.find_spec(fullname) + self.assertIsNot(spec, None) + self.assertIn(name, sorted(sys.modules)) + self.assertNotIn(fullname, sorted(sys.modules)) + # Ensure successive calls behave the same. + spec_again = self.util.find_spec(fullname) + self.assertEqual(spec_again, spec) + + def test_find_submodule_parent_already_imported(self): + name = 'spam' + subname = 'ham' + with util.temp_module(name, pkg=True) as pkg_dir: + self.init.import_module(name) + fullname, _ = util.submodule(name, subname, pkg_dir) + spec = self.util.find_spec(fullname) + self.assertIsNot(spec, None) + self.assertIn(name, sorted(sys.modules)) + self.assertNotIn(fullname, sorted(sys.modules)) + # Ensure successive calls behave the same. + spec_again = self.util.find_spec(fullname) + self.assertEqual(spec_again, spec) + + def test_find_relative_module(self): + name = 'spam' + subname = 'ham' + with util.temp_module(name, pkg=True) as pkg_dir: + fullname, _ = util.submodule(name, subname, pkg_dir) + relname = '.' + subname + spec = self.util.find_spec(relname, name) + self.assertIsNot(spec, None) + self.assertIn(name, sorted(sys.modules)) + self.assertNotIn(fullname, sorted(sys.modules)) + # Ensure successive calls behave the same. + spec_again = self.util.find_spec(fullname) + self.assertEqual(spec_again, spec) + + def test_find_relative_module_missing_package(self): + name = 'spam' + subname = 'ham' + with util.temp_module(name, pkg=True) as pkg_dir: + fullname, _ = util.submodule(name, subname, pkg_dir) + relname = '.' + subname + with self.assertRaises(ImportError): + self.util.find_spec(relname) + self.assertNotIn(name, sorted(sys.modules)) + self.assertNotIn(fullname, sorted(sys.modules)) + + def test_find_submodule_in_module(self): + # ModuleNotFoundError raised when a module is specified as + # a parent instead of a package. + with self.assertRaises(ModuleNotFoundError): + self.util.find_spec('module.name') + + +(Frozen_FindSpecTests, + Source_FindSpecTests + ) = util.test_both(FindSpecTests, init=init, util=importlib_util, + machinery=machinery) + + +class MagicNumberTests: + + def test_length(self): + # Should be 4 bytes. + self.assertEqual(len(self.util.MAGIC_NUMBER), 4) + + def test_incorporates_rn(self): + # The magic number uses \r\n to come out wrong when splitting on lines. + self.assertEndsWith(self.util.MAGIC_NUMBER, b'\r\n') + + +(Frozen_MagicNumberTests, + Source_MagicNumberTests + ) = util.test_both(MagicNumberTests, util=importlib_util) + + +class PEP3147Tests: + + """Tests of PEP 3147-related functions: cache_from_source and source_from_cache.""" + + tag = sys.implementation.cache_tag + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag not be None') + def test_cache_from_source(self): + # Given the path to a .py file, return the path to its PEP 3147 + # defined .pyc file (i.e. under __pycache__). + path = os.path.join('foo', 'bar', 'baz', 'qux.py') + expect = os.path.join('foo', 'bar', 'baz', '__pycache__', + 'qux.{}.pyc'.format(self.tag)) + self.assertEqual(self.util.cache_from_source(path, optimization=''), + expect) + + def test_cache_from_source_no_cache_tag(self): + # No cache tag means NotImplementedError. + with support.swap_attr(sys.implementation, 'cache_tag', None): + with self.assertRaises(NotImplementedError): + self.util.cache_from_source('whatever.py') + + def test_cache_from_source_no_dot(self): + # Directory with a dot, filename without dot. + path = os.path.join('foo.bar', 'file') + expect = os.path.join('foo.bar', '__pycache__', + 'file{}.pyc'.format(self.tag)) + self.assertEqual(self.util.cache_from_source(path, optimization=''), + expect) + + def test_cache_from_source_debug_override(self): + # Given the path to a .py file, return the path to its PEP 3147/PEP 488 + # defined .pyc file (i.e. under __pycache__). + path = os.path.join('foo', 'bar', 'baz', 'qux.py') + with warnings.catch_warnings(): + warnings.simplefilter('ignore') + self.assertEqual(self.util.cache_from_source(path, False), + self.util.cache_from_source(path, optimization=1)) + self.assertEqual(self.util.cache_from_source(path, True), + self.util.cache_from_source(path, optimization='')) + with warnings.catch_warnings(): + warnings.simplefilter('error') + with self.assertRaises(DeprecationWarning): + self.util.cache_from_source(path, False) + with self.assertRaises(DeprecationWarning): + self.util.cache_from_source(path, True) + + def test_cache_from_source_cwd(self): + path = 'foo.py' + expect = os.path.join('__pycache__', 'foo.{}.pyc'.format(self.tag)) + self.assertEqual(self.util.cache_from_source(path, optimization=''), + expect) + + def test_cache_from_source_override(self): + # When debug_override is not None, it can be any true-ish or false-ish + # value. + path = os.path.join('foo', 'bar', 'baz.py') + # However if the bool-ishness can't be determined, the exception + # propagates. + class Bearish: + def __bool__(self): raise RuntimeError + with warnings.catch_warnings(): + warnings.simplefilter('ignore') + self.assertEqual(self.util.cache_from_source(path, []), + self.util.cache_from_source(path, optimization=1)) + self.assertEqual(self.util.cache_from_source(path, [17]), + self.util.cache_from_source(path, optimization='')) + with self.assertRaises(RuntimeError): + self.util.cache_from_source('/foo/bar/baz.py', Bearish()) + + + def test_cache_from_source_optimization_empty_string(self): + # Setting 'optimization' to '' leads to no optimization tag (PEP 488). + path = 'foo.py' + expect = os.path.join('__pycache__', 'foo.{}.pyc'.format(self.tag)) + self.assertEqual(self.util.cache_from_source(path, optimization=''), + expect) + + def test_cache_from_source_optimization_None(self): + # Setting 'optimization' to None uses the interpreter's optimization. + # (PEP 488) + path = 'foo.py' + optimization_level = sys.flags.optimize + almost_expect = os.path.join('__pycache__', 'foo.{}'.format(self.tag)) + if optimization_level == 0: + expect = almost_expect + '.pyc' + elif optimization_level <= 2: + expect = almost_expect + '.opt-{}.pyc'.format(optimization_level) + else: + msg = '{!r} is a non-standard optimization level'.format(optimization_level) + self.skipTest(msg) + self.assertEqual(self.util.cache_from_source(path, optimization=None), + expect) + + def test_cache_from_source_optimization_set(self): + # The 'optimization' parameter accepts anything that has a string repr + # that passes str.alnum(). + path = 'foo.py' + valid_characters = string.ascii_letters + string.digits + almost_expect = os.path.join('__pycache__', 'foo.{}'.format(self.tag)) + got = self.util.cache_from_source(path, optimization=valid_characters) + # Test all valid characters are accepted. + self.assertEqual(got, + almost_expect + '.opt-{}.pyc'.format(valid_characters)) + # str() should be called on argument. + self.assertEqual(self.util.cache_from_source(path, optimization=42), + almost_expect + '.opt-42.pyc') + # Invalid characters raise ValueError. + with self.assertRaises(ValueError): + self.util.cache_from_source(path, optimization='path/is/bad') + + def test_cache_from_source_debug_override_optimization_both_set(self): + # Can only set one of the optimization-related parameters. + with warnings.catch_warnings(): + warnings.simplefilter('ignore') + with self.assertRaises(TypeError): + self.util.cache_from_source('foo.py', False, optimization='') + + @unittest.skipUnless(os.sep == '\\' and os.altsep == '/', + 'test meaningful only where os.altsep is defined') + def test_sep_altsep_and_sep_cache_from_source(self): + # Windows path and PEP 3147 where sep is right of altsep. + self.assertEqual( + self.util.cache_from_source('\\foo\\bar\\baz/qux.py', optimization=''), + '\\foo\\bar\\baz\\__pycache__\\qux.{}.pyc'.format(self.tag)) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag not be None') + def test_cache_from_source_path_like_arg(self): + path = pathlib.PurePath('foo', 'bar', 'baz', 'qux.py') + expect = os.path.join('foo', 'bar', 'baz', '__pycache__', + 'qux.{}.pyc'.format(self.tag)) + self.assertEqual(self.util.cache_from_source(path, optimization=''), + expect) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_source_from_cache(self): + # Given the path to a PEP 3147 defined .pyc file, return the path to + # its source. This tests the good path. + path = os.path.join('foo', 'bar', 'baz', '__pycache__', + 'qux.{}.pyc'.format(self.tag)) + expect = os.path.join('foo', 'bar', 'baz', 'qux.py') + self.assertEqual(self.util.source_from_cache(path), expect) + + def test_source_from_cache_no_cache_tag(self): + # If sys.implementation.cache_tag is None, raise NotImplementedError. + path = os.path.join('blah', '__pycache__', 'whatever.pyc') + with support.swap_attr(sys.implementation, 'cache_tag', None): + with self.assertRaises(NotImplementedError): + self.util.source_from_cache(path) + + def test_source_from_cache_bad_path(self): + # When the path to a pyc file is not in PEP 3147 format, a ValueError + # is raised. + self.assertRaises( + ValueError, self.util.source_from_cache, '/foo/bar/bazqux.pyc') + + def test_source_from_cache_no_slash(self): + # No slashes at all in path -> ValueError + self.assertRaises( + ValueError, self.util.source_from_cache, 'foo.cpython-32.pyc') + + def test_source_from_cache_too_few_dots(self): + # Too few dots in final path component -> ValueError + self.assertRaises( + ValueError, self.util.source_from_cache, '__pycache__/foo.pyc') + + def test_source_from_cache_too_many_dots(self): + with self.assertRaises(ValueError): + self.util.source_from_cache( + '__pycache__/foo.cpython-32.opt-1.foo.pyc') + + def test_source_from_cache_not_opt(self): + # Non-`opt-` path component -> ValueError + self.assertRaises( + ValueError, self.util.source_from_cache, + '__pycache__/foo.cpython-32.foo.pyc') + + def test_source_from_cache_no__pycache__(self): + # Another problem with the path -> ValueError + self.assertRaises( + ValueError, self.util.source_from_cache, + '/foo/bar/foo.cpython-32.foo.pyc') + + def test_source_from_cache_optimized_bytecode(self): + # Optimized bytecode is not an issue. + path = os.path.join('__pycache__', 'foo.{}.opt-1.pyc'.format(self.tag)) + self.assertEqual(self.util.source_from_cache(path), 'foo.py') + + def test_source_from_cache_missing_optimization(self): + # An empty optimization level is a no-no. + path = os.path.join('__pycache__', 'foo.{}.opt-.pyc'.format(self.tag)) + with self.assertRaises(ValueError): + self.util.source_from_cache(path) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_source_from_cache_path_like_arg(self): + path = pathlib.PurePath('foo', 'bar', 'baz', '__pycache__', + 'qux.{}.pyc'.format(self.tag)) + expect = os.path.join('foo', 'bar', 'baz', 'qux.py') + self.assertEqual(self.util.source_from_cache(path), expect) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_cache_from_source_respects_pycache_prefix(self): + # If pycache_prefix is set, cache_from_source will return a bytecode + # path inside that directory (in a subdirectory mirroring the .py file's + # path) rather than in a __pycache__ dir next to the py file. + pycache_prefixes = [ + os.path.join(os.path.sep, 'tmp', 'bytecode'), + os.path.join(os.path.sep, 'tmp', '\u2603'), # non-ASCII in path! + os.path.join(os.path.sep, 'tmp', 'trailing-slash') + os.path.sep, + ] + drive = '' + if os.name == 'nt': + drive = 'C:' + pycache_prefixes = [ + f'{drive}{prefix}' for prefix in pycache_prefixes] + pycache_prefixes += [r'\\?\C:\foo', r'\\localhost\c$\bar'] + for pycache_prefix in pycache_prefixes: + with self.subTest(path=pycache_prefix): + path = drive + os.path.join( + os.path.sep, 'foo', 'bar', 'baz', 'qux.py') + expect = os.path.join( + pycache_prefix, 'foo', 'bar', 'baz', + 'qux.{}.pyc'.format(self.tag)) + with util.temporary_pycache_prefix(pycache_prefix): + self.assertEqual( + self.util.cache_from_source(path, optimization=''), + expect) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_cache_from_source_respects_pycache_prefix_relative(self): + # If the .py path we are given is relative, we will resolve to an + # absolute path before prefixing with pycache_prefix, to avoid any + # possible ambiguity. + pycache_prefix = os.path.join(os.path.sep, 'tmp', 'bytecode') + path = os.path.join('foo', 'bar', 'baz', 'qux.py') + root = os.path.splitdrive(os.getcwd())[0] + os.path.sep + expect = os.path.join( + pycache_prefix, + os.path.relpath(os.getcwd(), root), + 'foo', 'bar', 'baz', f'qux.{self.tag}.pyc') + with util.temporary_pycache_prefix(pycache_prefix): + self.assertEqual( + self.util.cache_from_source(path, optimization=''), + os.path.normpath(expect)) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_cache_from_source_in_root_with_pycache_prefix(self): + # Regression test for gh-82916 + pycache_prefix = os.path.join(os.path.sep, 'tmp', 'bytecode') + path = 'qux.py' + expect = os.path.join(os.path.sep, 'tmp', 'bytecode', + f'qux.{self.tag}.pyc') + with util.temporary_pycache_prefix(pycache_prefix): + with os_helper.change_cwd('/'): + self.assertEqual(self.util.cache_from_source(path), expect) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_source_from_cache_inside_pycache_prefix(self): + # If pycache_prefix is set and the cache path we get is inside it, + # we return an absolute path to the py file based on the remainder of + # the path within pycache_prefix. + pycache_prefix = os.path.join(os.path.sep, 'tmp', 'bytecode') + path = os.path.join(pycache_prefix, 'foo', 'bar', 'baz', + f'qux.{self.tag}.pyc') + expect = os.path.join(os.path.sep, 'foo', 'bar', 'baz', 'qux.py') + with util.temporary_pycache_prefix(pycache_prefix): + self.assertEqual(self.util.source_from_cache(path), expect) + + @unittest.skipIf(sys.implementation.cache_tag is None, + 'requires sys.implementation.cache_tag to not be None') + def test_source_from_cache_outside_pycache_prefix(self): + # If pycache_prefix is set but the cache path we get is not inside + # it, just ignore it and handle the cache path according to the default + # behavior. + pycache_prefix = os.path.join(os.path.sep, 'tmp', 'bytecode') + path = os.path.join('foo', 'bar', 'baz', '__pycache__', + f'qux.{self.tag}.pyc') + expect = os.path.join('foo', 'bar', 'baz', 'qux.py') + with util.temporary_pycache_prefix(pycache_prefix): + self.assertEqual(self.util.source_from_cache(path), expect) + + +(Frozen_PEP3147Tests, + Source_PEP3147Tests + ) = util.test_both(PEP3147Tests, util=importlib_util) + + +class MagicNumberTests(unittest.TestCase): + """ + Test release compatibility issues relating to importlib + """ + @unittest.skipUnless( + sys.version_info.releaselevel in ('candidate', 'final'), + 'only applies to candidate or final python release levels' + ) + def test_magic_number(self): + # Each python minor release should generally have a MAGIC_NUMBER + # that does not change once the release reaches candidate status. + + # Once a release reaches candidate status, the value of the constant + # EXPECTED_MAGIC_NUMBER in this test should be changed. + # This test will then check that the actual MAGIC_NUMBER matches + # the expected value for the release. + + # In exceptional cases, it may be required to change the MAGIC_NUMBER + # for a maintenance release. In this case the change should be + # discussed in python-dev. If a change is required, community + # stakeholders such as OS package maintainers must be notified + # in advance. Such exceptional releases will then require an + # adjustment to this test case. + EXPECTED_MAGIC_NUMBER = 3627 + actual = int.from_bytes(importlib.util.MAGIC_NUMBER[:2], 'little') + + msg = ( + "To avoid breaking backwards compatibility with cached bytecode " + "files that can't be automatically regenerated by the current " + "user, candidate and final releases require the current " + "importlib.util.MAGIC_NUMBER to match the expected " + "magic number in this test. Set the expected " + "magic number in this test to the current MAGIC_NUMBER to " + "continue with the release.\n\n" + "Changing the MAGIC_NUMBER for a maintenance release " + "requires discussion in python-dev and notification of " + "community stakeholders." + ) + self.assertEqual(EXPECTED_MAGIC_NUMBER, actual, msg) + + +@unittest.skipIf(_interpreters is None, 'subinterpreters required') +class IncompatibleExtensionModuleRestrictionsTests(unittest.TestCase): + + def run_with_own_gil(self, script): + interpid = _interpreters.create('isolated') + def ensure_destroyed(): + try: + _interpreters.destroy(interpid) + except _interpreters.InterpreterNotFoundError: + pass + self.addCleanup(ensure_destroyed) + excsnap = _interpreters.exec(interpid, script) + if excsnap is not None: + if excsnap.type.__name__ == 'ImportError': + raise ImportError(excsnap.msg) + + def run_with_shared_gil(self, script): + interpid = _interpreters.create('legacy') + def ensure_destroyed(): + try: + _interpreters.destroy(interpid) + except _interpreters.InterpreterNotFoundError: + pass + self.addCleanup(ensure_destroyed) + excsnap = _interpreters.exec(interpid, script) + if excsnap is not None: + if excsnap.type.__name__ == 'ImportError': + raise ImportError(excsnap.msg) + + @unittest.skipIf(_testsinglephase is None, "test requires _testsinglephase module") + # gh-117649: single-phase init modules are not currently supported in + # subinterpreters in the free-threaded build + @support.expected_failure_if_gil_disabled() + def test_single_phase_init_module(self): + script = textwrap.dedent(''' + from importlib.util import _incompatible_extension_module_restrictions + with _incompatible_extension_module_restrictions(disable_check=True): + import _testsinglephase + ''') + with self.subTest('check disabled, shared GIL'): + self.run_with_shared_gil(script) + with self.subTest('check disabled, per-interpreter GIL'): + self.run_with_own_gil(script) + + script = textwrap.dedent(f''' + from importlib.util import _incompatible_extension_module_restrictions + with _incompatible_extension_module_restrictions(disable_check=False): + import _testsinglephase + ''') + with self.subTest('check enabled, shared GIL'): + with self.assertRaises(ImportError): + self.run_with_shared_gil(script) + with self.subTest('check enabled, per-interpreter GIL'): + with self.assertRaises(ImportError): + self.run_with_own_gil(script) + + @unittest.skipIf(_testmultiphase is None, "test requires _testmultiphase module") + @support.requires_gil_enabled("gh-117649: not supported in free-threaded build") + def test_incomplete_multi_phase_init_module(self): + # Apple extensions must be distributed as frameworks. This requires + # a specialist loader. + if support.is_apple_mobile: + loader = "AppleFrameworkLoader" + else: + loader = "ExtensionFileLoader" + + prescript = textwrap.dedent(f''' + from importlib.util import spec_from_loader, module_from_spec + from importlib.machinery import {loader} + + name = '_test_shared_gil_only' + filename = {_testmultiphase.__file__!r} + loader = {loader}(name, filename) + spec = spec_from_loader(name, loader) + + ''') + + script = prescript + textwrap.dedent(''' + from importlib.util import _incompatible_extension_module_restrictions + with _incompatible_extension_module_restrictions(disable_check=True): + module = module_from_spec(spec) + loader.exec_module(module) + ''') + with self.subTest('check disabled, shared GIL'): + self.run_with_shared_gil(script) + with self.subTest('check disabled, per-interpreter GIL'): + self.run_with_own_gil(script) + + script = prescript + textwrap.dedent(''' + from importlib.util import _incompatible_extension_module_restrictions + with _incompatible_extension_module_restrictions(disable_check=False): + module = module_from_spec(spec) + loader.exec_module(module) + ''') + with self.subTest('check enabled, shared GIL'): + self.run_with_shared_gil(script) + with self.subTest('check enabled, per-interpreter GIL'): + with self.assertRaises(ImportError): + self.run_with_own_gil(script) + + @unittest.skipIf(_testmultiphase is None, "test requires _testmultiphase module") + def test_complete_multi_phase_init_module(self): + script = textwrap.dedent(''' + from importlib.util import _incompatible_extension_module_restrictions + with _incompatible_extension_module_restrictions(disable_check=True): + import _testmultiphase + ''') + with self.subTest('check disabled, shared GIL'): + self.run_with_shared_gil(script) + with self.subTest('check disabled, per-interpreter GIL'): + self.run_with_own_gil(script) + + script = textwrap.dedent(f''' + from importlib.util import _incompatible_extension_module_restrictions + with _incompatible_extension_module_restrictions(disable_check=False): + import _testmultiphase + ''') + with self.subTest('check enabled, shared GIL'): + self.run_with_shared_gil(script) + with self.subTest('check enabled, per-interpreter GIL'): + self.run_with_own_gil(script) + + +class PatchAtomicWrites: + def __init__(self, truncate_at_length, never_complete=False): + self.truncate_at_length = truncate_at_length + self.never_complete = never_complete + self.seen_write = False + self._children = [] + + def __enter__(self): + import _pyio + + oldwrite = os.write + + # Emulate an os.write that only writes partial data. + def write(fd, data): + if self.seen_write and self.never_complete: + return None + self.seen_write = True + return oldwrite(fd, data[:self.truncate_at_length]) + + # Need to patch _io to be _pyio, so that io.FileIO is affected by the + # os.write patch. + self.children = [ + support.swap_attr(_bootstrap_external, '_io', _pyio), + support.swap_attr(os, 'write', write) + ] + for child in self.children: + child.__enter__() + return self + + def __exit__(self, exc_type, exc_val, exc_tb): + for child in self.children: + child.__exit__(exc_type, exc_val, exc_tb) + + +class MiscTests(unittest.TestCase): + + def test_atomic_write_retries_incomplete_writes(self): + truncate_at_length = 100 + length = truncate_at_length * 2 + + with PatchAtomicWrites(truncate_at_length=truncate_at_length) as cm: + # Make sure we write something longer than the point where we + # truncate. + content = b'x' * length + _bootstrap_external._write_atomic(os_helper.TESTFN, content) + self.assertTrue(cm.seen_write) + + self.assertEqual(os.stat(support.os_helper.TESTFN).st_size, length) + os.unlink(support.os_helper.TESTFN) + + def test_atomic_write_errors_if_unable_to_complete(self): + truncate_at_length = 100 + + with ( + PatchAtomicWrites( + truncate_at_length=truncate_at_length, never_complete=True, + ) as cm, + self.assertRaises(OSError) + ): + # Make sure we write something longer than the point where we + # truncate. + content = b'x' * (truncate_at_length * 2) + _bootstrap_external._write_atomic(os_helper.TESTFN, content) + self.assertTrue(cm.seen_write) + + with self.assertRaises(OSError): + os.stat(support.os_helper.TESTFN) # Check that the file did not get written. + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/test_windows.py b/stdlib/test/test_importlib/test_windows.py new file mode 100644 index 00000000..bef4fb46 --- /dev/null +++ b/stdlib/test/test_importlib/test_windows.py @@ -0,0 +1,210 @@ +from test.test_importlib import util as test_util +machinery = test_util.import_importlib('importlib.machinery') + +import os +import re +import sys +import unittest +from test import support +from test.support import import_helper +from contextlib import contextmanager +from test.test_importlib.util import temp_module + +import_helper.import_module('winreg', required_on=['win']) +from winreg import ( + CreateKey, HKEY_CURRENT_USER, + SetValue, REG_SZ, KEY_ALL_ACCESS, + EnumKey, CloseKey, DeleteKey, OpenKey +) + +def get_platform(): + # Port of distutils.util.get_platform(). + TARGET_TO_PLAT = { + 'x86' : 'win32', + 'x64' : 'win-amd64', + 'arm' : 'win-arm32', + } + if ('VSCMD_ARG_TGT_ARCH' in os.environ and + os.environ['VSCMD_ARG_TGT_ARCH'] in TARGET_TO_PLAT): + return TARGET_TO_PLAT[os.environ['VSCMD_ARG_TGT_ARCH']] + elif 'amd64' in sys.version.lower(): + return 'win-amd64' + elif '(arm)' in sys.version.lower(): + return 'win-arm32' + elif '(arm64)' in sys.version.lower(): + return 'win-arm64' + else: + return sys.platform + +def delete_registry_tree(root, subkey): + try: + hkey = OpenKey(root, subkey, access=KEY_ALL_ACCESS) + except OSError: + # subkey does not exist + return + while True: + try: + subsubkey = EnumKey(hkey, 0) + except OSError: + # no more subkeys + break + delete_registry_tree(hkey, subsubkey) + CloseKey(hkey) + DeleteKey(root, subkey) + +@contextmanager +def setup_module(machinery, name, path=None): + if machinery.WindowsRegistryFinder.DEBUG_BUILD: + root = machinery.WindowsRegistryFinder.REGISTRY_KEY_DEBUG + else: + root = machinery.WindowsRegistryFinder.REGISTRY_KEY + key = root.format(fullname=name, + sys_version='%d.%d' % sys.version_info[:2]) + base_key = "Software\\Python\\PythonCore\\{}.{}".format( + sys.version_info.major, sys.version_info.minor) + assert key.casefold().startswith(base_key.casefold()), ( + "expected key '{}' to start with '{}'".format(key, base_key)) + try: + with temp_module(name, "a = 1") as location: + try: + OpenKey(HKEY_CURRENT_USER, base_key) + if machinery.WindowsRegistryFinder.DEBUG_BUILD: + delete_key = os.path.dirname(key) + else: + delete_key = key + except OSError: + delete_key = base_key + subkey = CreateKey(HKEY_CURRENT_USER, key) + if path is None: + path = location + ".py" + SetValue(subkey, "", REG_SZ, path) + yield + finally: + if delete_key: + delete_registry_tree(HKEY_CURRENT_USER, delete_key) + + +@unittest.skipUnless(sys.platform.startswith('win'), 'requires Windows') +class WindowsRegistryFinderTests: + # The module name is process-specific, allowing for + # simultaneous runs of the same test on a single machine. + test_module = "spamham{}".format(os.getpid()) + + def test_find_spec_missing(self): + with self.assertWarnsRegex( + DeprecationWarning, + r"importlib\.machinery\.WindowsRegistryFinder is deprecated; " + r"use site configuration instead\. Future versions of Python may " + r"not enable this finder by default\." + ): + spec = self.machinery.WindowsRegistryFinder.find_spec('spam') + self.assertIsNone(spec) + + def test_module_found(self): + with setup_module(self.machinery, self.test_module): + with self.assertWarnsRegex( + DeprecationWarning, + r"importlib\.machinery\.WindowsRegistryFinder is deprecated; " + r"use site configuration instead\. Future versions of Python may " + r"not enable this finder by default\." + ): + spec = self.machinery.WindowsRegistryFinder.find_spec(self.test_module) + self.assertIsNotNone(spec) + + def test_module_not_found(self): + with setup_module(self.machinery, self.test_module, path="."): + with self.assertWarnsRegex( + DeprecationWarning, + r"importlib\.machinery\.WindowsRegistryFinder is deprecated; " + r"use site configuration instead\. Future versions of Python may " + r"not enable this finder by default\." + ): + spec = self.machinery.WindowsRegistryFinder.find_spec(self.test_module) + self.assertIsNone(spec) + + def test_raises_deprecation_warning(self): + # WindowsRegistryFinder is not meant to be instantiated, so the + # deprecation warning is raised in the 'find_spec' method instead. + with self.assertWarnsRegex( + DeprecationWarning, + r"importlib\.machinery\.WindowsRegistryFinder is deprecated; " + r"use site configuration instead\. Future versions of Python may " + r"not enable this finder by default\." + ): + self.machinery.WindowsRegistryFinder.find_spec('spam') + +(Frozen_WindowsRegistryFinderTests, + Source_WindowsRegistryFinderTests + ) = test_util.test_both(WindowsRegistryFinderTests, machinery=machinery) + +@unittest.skipUnless(sys.platform.startswith('win'), 'requires Windows') +class WindowsExtensionSuffixTests: + def test_tagged_suffix(self): + suffixes = self.machinery.EXTENSION_SUFFIXES + abi_flags = "t" if support.Py_GIL_DISABLED else "" + ver = sys.version_info + platform = re.sub('[^a-zA-Z0-9]', '_', get_platform()) + expected_tag = f".cp{ver.major}{ver.minor}{abi_flags}-{platform}.pyd" + try: + untagged_i = suffixes.index(".pyd") + except ValueError: + untagged_i = suffixes.index("_d.pyd") + expected_tag = "_d" + expected_tag + + self.assertIn(expected_tag, suffixes) + + # Ensure the tags are in the correct order. + tagged_i = suffixes.index(expected_tag) + self.assertLess(tagged_i, untagged_i) + +(Frozen_WindowsExtensionSuffixTests, + Source_WindowsExtensionSuffixTests + ) = test_util.test_both(WindowsExtensionSuffixTests, machinery=machinery) + + +@unittest.skipUnless(sys.platform.startswith('win'), 'requires Windows') +class WindowsBootstrapPathTests(unittest.TestCase): + def check_join(self, expected, *inputs): + from importlib._bootstrap_external import _path_join + actual = _path_join(*inputs) + if expected.casefold() == actual.casefold(): + return + self.assertEqual(expected, actual) + + def test_path_join(self): + self.check_join(r"C:\A\B", "C:\\", "A", "B") + self.check_join(r"C:\A\B", "D:\\", "D", "C:\\", "A", "B") + self.check_join(r"C:\A\B", "C:\\", "A", "C:B") + self.check_join(r"C:\A\B", "C:\\", "A\\B") + self.check_join(r"C:\A\B", r"C:\A\B") + + self.check_join("D:A", r"D:", "A") + self.check_join("D:A", r"C:\B\C", "D:", "A") + self.check_join("D:A", r"C:\B\C", r"D:A") + + self.check_join(r"A\B\C", "A", "B", "C") + self.check_join(r"A\B\C", "A", r"B\C") + self.check_join(r"A\B/C", "A", "B/C") + self.check_join(r"A\B\C", "A/", "B\\", "C") + + # Dots are not normalised by this function + self.check_join(r"A\../C", "A", "../C") + self.check_join(r"A.\.\B", "A.", ".", "B") + + self.check_join(r"\\Server\Share\A\B\C", r"\\Server\Share", "A", "B", "C") + self.check_join(r"\\Server\Share\A\B\C", r"\\Server\Share", "D", r"\A", "B", "C") + self.check_join(r"\\Server\Share\A\B\C", r"\\Server2\Share2", "D", + r"\\Server\Share", "A", "B", "C") + self.check_join(r"\\Server\Share\A\B\C", r"\\Server", r"\Share", "A", "B", "C") + self.check_join(r"\\Server\Share", r"\\Server\Share") + self.check_join(r"\\Server\Share\\", r"\\Server\Share\\") + + # Handle edge cases with empty segments + self.check_join("C:\\A", "C:/A", "") + self.check_join("C:\\", "C:/", "") + self.check_join("C:", "C:", "") + self.check_join("//Server/Share\\", "//Server/Share/", "") + self.check_join("//Server/Share\\", "//Server/Share", "") + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_importlib/threaded_import_hangers.py b/stdlib/test/test_importlib/threaded_import_hangers.py new file mode 100644 index 00000000..5484e60a --- /dev/null +++ b/stdlib/test/test_importlib/threaded_import_hangers.py @@ -0,0 +1,45 @@ +# This is a helper module for test_threaded_import. The test imports this +# module, and this module tries to run various Python library functions in +# their own thread, as a side effect of being imported. If the spawned +# thread doesn't complete in TIMEOUT seconds, an "appeared to hang" message +# is appended to the module-global `errors` list. That list remains empty +# if (and only if) all functions tested complete. + +TIMEOUT = 10 + +import threading + +import tempfile +import os.path + +errors = [] + +# This class merely runs a function in its own thread T. The thread importing +# this module holds the import lock, so if the function called by T tries +# to do its own imports it will block waiting for this module's import +# to complete. +class Worker(threading.Thread): + def __init__(self, function, args): + threading.Thread.__init__(self) + self.function = function + self.args = args + + def run(self): + self.function(*self.args) + +for name, func, args in [ + # Bug 147376: TemporaryFile hung on Windows, starting in Python 2.4. + ("tempfile.TemporaryFile", lambda: tempfile.TemporaryFile().close(), ()), + + # The real cause for bug 147376: ntpath.abspath() caused the hang. + ("os.path.abspath", os.path.abspath, ('.',)), + ]: + + try: + t = Worker(func, args) + t.start() + t.join(TIMEOUT) + if t.is_alive(): + errors.append("%s appeared to hang" % name) + finally: + del t diff --git a/stdlib/test/test_importlib/util.py b/stdlib/test/test_importlib/util.py new file mode 100644 index 00000000..bd64b03b --- /dev/null +++ b/stdlib/test/test_importlib/util.py @@ -0,0 +1,402 @@ +import builtins +import contextlib +import errno +import functools +from importlib import machinery, util, invalidate_caches +import marshal +import os +import os.path +from test import support +from test.support import import_helper +from test.support import is_apple_mobile +from test.support import os_helper +import unittest +import sys +import tempfile +import types + +import_helper.import_module("_testmultiphase") + + +BUILTINS = types.SimpleNamespace() +BUILTINS.good_name = None +BUILTINS.bad_name = None +if 'errno' in sys.builtin_module_names: + BUILTINS.good_name = 'errno' +if 'importlib' not in sys.builtin_module_names: + BUILTINS.bad_name = 'importlib' + +if support.is_wasi: + # dlopen() is a shim for WASI as of WASI SDK which fails by default. + # We don't provide an implementation, so tests will fail. + # But we also don't want to turn off dynamic loading for those that provide + # a working implementation. + def _extension_details(): + global EXTENSIONS + EXTENSIONS = None +else: + EXTENSIONS = types.SimpleNamespace() + EXTENSIONS.path = None + EXTENSIONS.ext = None + EXTENSIONS.filename = None + EXTENSIONS.file_path = None + EXTENSIONS.name = '_testsinglephase' + + def _extension_details(): + global EXTENSIONS + for path in sys.path: + for ext in machinery.EXTENSION_SUFFIXES: + # Apple mobile platforms mechanically load .so files, + # but the findable files are labelled .fwork + if is_apple_mobile: + ext = ext.replace(".so", ".fwork") + + filename = EXTENSIONS.name + ext + file_path = os.path.join(path, filename) + if os.path.exists(file_path): + EXTENSIONS.path = path + EXTENSIONS.ext = ext + EXTENSIONS.filename = filename + EXTENSIONS.file_path = file_path + return + +_extension_details() + + +def import_importlib(module_name): + """Import a module from importlib both w/ and w/o _frozen_importlib.""" + fresh = ('importlib',) if '.' in module_name else () + frozen = import_helper.import_fresh_module(module_name) + source = import_helper.import_fresh_module(module_name, fresh=fresh, + blocked=('_frozen_importlib', '_frozen_importlib_external')) + return {'Frozen': frozen, 'Source': source} + + +def specialize_class(cls, kind, base=None, **kwargs): + # XXX Support passing in submodule names--load (and cache) them? + # That would clean up the test modules a bit more. + if base is None: + base = unittest.TestCase + elif not isinstance(base, type): + base = base[kind] + name = '{}_{}'.format(kind, cls.__name__) + bases = (cls, base) + specialized = types.new_class(name, bases) + specialized.__module__ = cls.__module__ + specialized._NAME = cls.__name__ + specialized._KIND = kind + for attr, values in kwargs.items(): + value = values[kind] + setattr(specialized, attr, value) + return specialized + + +def split_frozen(cls, base=None, **kwargs): + frozen = specialize_class(cls, 'Frozen', base, **kwargs) + source = specialize_class(cls, 'Source', base, **kwargs) + return frozen, source + + +def test_both(test_class, base=None, **kwargs): + return split_frozen(test_class, base, **kwargs) + + +CASE_INSENSITIVE_FS = True +# Windows is the only OS that is *always* case-insensitive +# (OS X *can* be case-sensitive). +if sys.platform not in ('win32', 'cygwin'): + changed_name = __file__.upper() + if changed_name == __file__: + changed_name = __file__.lower() + if not os.path.exists(changed_name): + CASE_INSENSITIVE_FS = False + +source_importlib = import_importlib('importlib')['Source'] +__import__ = {'Frozen': staticmethod(builtins.__import__), + 'Source': staticmethod(source_importlib.__import__)} + + +def case_insensitive_tests(test): + """Class decorator that nullifies tests requiring a case-insensitive + file system.""" + return unittest.skipIf(not CASE_INSENSITIVE_FS, + "requires a case-insensitive filesystem")(test) + + +def submodule(parent, name, pkg_dir, content=''): + path = os.path.join(pkg_dir, name + '.py') + with open(path, 'w', encoding='utf-8') as subfile: + subfile.write(content) + return '{}.{}'.format(parent, name), path + + +def get_code_from_pyc(pyc_path): + """Reads a pyc file and returns the unmarshalled code object within. + + No header validation is performed. + """ + with open(pyc_path, 'rb') as pyc_f: + pyc_f.seek(16) + return marshal.load(pyc_f) + + +@contextlib.contextmanager +def uncache(*names): + """Uncache a module from sys.modules. + + A basic sanity check is performed to prevent uncaching modules that either + cannot/shouldn't be uncached. + + """ + for name in names: + if name in ('sys', 'marshal'): + raise ValueError("cannot uncache {}".format(name)) + try: + del sys.modules[name] + except KeyError: + pass + try: + yield + finally: + for name in names: + try: + del sys.modules[name] + except KeyError: + pass + + +@contextlib.contextmanager +def temp_module(name, content='', *, pkg=False): + conflicts = [n for n in sys.modules if n.partition('.')[0] == name] + with os_helper.temp_cwd(None) as cwd: + with uncache(name, *conflicts): + with import_helper.DirsOnSysPath(cwd): + invalidate_caches() + + location = os.path.join(cwd, name) + if pkg: + modpath = os.path.join(location, '__init__.py') + os.mkdir(name) + else: + modpath = location + '.py' + if content is None: + # Make sure the module file gets created. + content = '' + if content is not None: + # not a namespace package + with open(modpath, 'w', encoding='utf-8') as modfile: + modfile.write(content) + yield location + + +@contextlib.contextmanager +def import_state(**kwargs): + """Context manager to manage the various importers and stored state in the + sys module. + + The 'modules' attribute is not supported as the interpreter state stores a + pointer to the dict that the interpreter uses internally; + reassigning to sys.modules does not have the desired effect. + + """ + originals = {} + try: + for attr, default in (('meta_path', []), ('path', []), + ('path_hooks', []), + ('path_importer_cache', {})): + originals[attr] = getattr(sys, attr) + if attr in kwargs: + new_value = kwargs[attr] + del kwargs[attr] + else: + new_value = default + setattr(sys, attr, new_value) + if len(kwargs): + raise ValueError('unrecognized arguments: {}'.format(kwargs)) + yield + finally: + for attr, value in originals.items(): + setattr(sys, attr, value) + + +class _ImporterMock: + + """Base class to help with creating importer mocks.""" + + def __init__(self, *names, module_code={}): + self.modules = {} + self.module_code = {} + for name in names: + if not name.endswith('.__init__'): + import_name = name + else: + import_name = name[:-len('.__init__')] + if '.' not in name: + package = None + elif import_name == name: + package = name.rsplit('.', 1)[0] + else: + package = import_name + module = types.ModuleType(import_name) + module.__loader__ = self + module.__file__ = '' + module.__package__ = package + module.attr = name + if import_name != name: + module.__path__ = [''] + self.modules[import_name] = module + if import_name in module_code: + self.module_code[import_name] = module_code[import_name] + + def __getitem__(self, name): + return self.modules[name] + + def __enter__(self): + self._uncache = uncache(*self.modules.keys()) + self._uncache.__enter__() + return self + + def __exit__(self, *exc_info): + self._uncache.__exit__(None, None, None) + + +class mock_spec(_ImporterMock): + + """Importer mock using PEP 451 APIs.""" + + def find_spec(self, fullname, path=None, parent=None): + try: + module = self.modules[fullname] + except KeyError: + return None + spec = util.spec_from_file_location( + fullname, module.__file__, loader=self, + submodule_search_locations=getattr(module, '__path__', None)) + return spec + + def create_module(self, spec): + if spec.name not in self.modules: + raise ImportError + return self.modules[spec.name] + + def exec_module(self, module): + try: + self.module_code[module.__spec__.name]() + except KeyError: + pass + + +def writes_bytecode_files(fxn): + """Decorator to protect sys.dont_write_bytecode from mutation and to skip + tests that require it to be set to False.""" + if sys.dont_write_bytecode: + return unittest.skip("relies on writing bytecode")(fxn) + @functools.wraps(fxn) + def wrapper(*args, **kwargs): + original = sys.dont_write_bytecode + sys.dont_write_bytecode = False + try: + to_return = fxn(*args, **kwargs) + finally: + sys.dont_write_bytecode = original + return to_return + return wrapper + + +def ensure_bytecode_path(bytecode_path): + """Ensure that the __pycache__ directory for PEP 3147 pyc file exists. + + :param bytecode_path: File system path to PEP 3147 pyc file. + """ + try: + os.mkdir(os.path.dirname(bytecode_path)) + except OSError as error: + if error.errno != errno.EEXIST: + raise + + +@contextlib.contextmanager +def temporary_pycache_prefix(prefix): + """Adjust and restore sys.pycache_prefix.""" + _orig_prefix = sys.pycache_prefix + sys.pycache_prefix = prefix + try: + yield + finally: + sys.pycache_prefix = _orig_prefix + + +@contextlib.contextmanager +def create_modules(*names): + """Temporarily create each named module with an attribute (named 'attr') + that contains the name passed into the context manager that caused the + creation of the module. + + All files are created in a temporary directory returned by + tempfile.mkdtemp(). This directory is inserted at the beginning of + sys.path. When the context manager exits all created files (source and + bytecode) are explicitly deleted. + + No magic is performed when creating packages! This means that if you create + a module within a package you must also create the package's __init__ as + well. + + """ + source = 'attr = {0!r}' + created_paths = [] + mapping = {} + state_manager = None + uncache_manager = None + try: + temp_dir = tempfile.mkdtemp() + mapping['.root'] = temp_dir + import_names = set() + for name in names: + if not name.endswith('__init__'): + import_name = name + else: + import_name = name[:-len('.__init__')] + import_names.add(import_name) + if import_name in sys.modules: + del sys.modules[import_name] + name_parts = name.split('.') + file_path = temp_dir + for directory in name_parts[:-1]: + file_path = os.path.join(file_path, directory) + if not os.path.exists(file_path): + os.mkdir(file_path) + created_paths.append(file_path) + file_path = os.path.join(file_path, name_parts[-1] + '.py') + with open(file_path, 'w', encoding='utf-8') as file: + file.write(source.format(name)) + created_paths.append(file_path) + mapping[name] = file_path + uncache_manager = uncache(*import_names) + uncache_manager.__enter__() + state_manager = import_state(path=[temp_dir]) + state_manager.__enter__() + yield mapping + finally: + if state_manager is not None: + state_manager.__exit__(None, None, None) + if uncache_manager is not None: + uncache_manager.__exit__(None, None, None) + os_helper.rmtree(temp_dir) + + +def mock_path_hook(*entries, importer): + """A mock sys.path_hooks entry.""" + def hook(entry): + if entry not in entries: + raise ImportError + return importer + return hook + + +class CASEOKTestBase: + + def caseok_env_changed(self, *, should_exist): + possibilities = b'PYTHONCASEOK', 'PYTHONCASEOK' + if any(x in self.importlib._bootstrap_external._os.environ + for x in possibilities) != should_exist: + self.skipTest('os.environ changes not reflected in _os.environ') diff --git a/stdlibinit/registry.go b/stdlibinit/registry.go index eeac2ec2..7e47064d 100644 --- a/stdlibinit/registry.go +++ b/stdlibinit/registry.go @@ -174,6 +174,13 @@ import ( // CPython: Modules/_testcapi/vectorcall.c:1 vectorcall fixtures _ "github.com/tamnd/gopy/module/_testcapi" + // Built-in module: _testmultiphase. Registers itself via + // module/_testmultiphase/module.go init(). Reproduces the PEP 489 + // multi-phase init extension's main module so test.test_importlib.util + // imports instead of raising SkipTest. + // CPython: Modules/_testmultiphase.c:447 PyInit__testmultiphase + _ "github.com/tamnd/gopy/module/_testmultiphase" + // Built-in module: _json. Registers itself via // module/_json/module.go init(). Accelerates json.py with // scanstring and encode_basestring helpers. From e50c2e2dc7a32e872a08a794d81598ab68538e1e Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 22:44:25 +0700 Subject: [PATCH 06/84] importlib.util: add _find_spec_from_path pyclbr.readmodule_ex calls importlib.util._find_spec_from_path to locate a module's source without importing it. Port it on top of the existing directory-scan helper (factored out of find_spec): check sys.modules first, returning the cached __spec__ or raising when it is missing/None, otherwise scan the supplied path. test_pyclbr gets past the import and now only trips on modules that lack __spec__, which is the next gap. --- stdlib/importlib/util.py | 63 +++++++++++++++++++++++++++++++--------- 1 file changed, 49 insertions(+), 14 deletions(-) diff --git a/stdlib/importlib/util.py b/stdlib/importlib/util.py index aadfcae6..fdd8e19b 100644 --- a/stdlib/importlib/util.py +++ b/stdlib/importlib/util.py @@ -82,22 +82,14 @@ def _resolve_search_paths(name): return getattr(pkg, "__path__", None) -def find_spec(name, package=None): - """Locate name on sys.path (or the parent package's __path__) and - return a ModuleSpec the caller can drive through .loader.get_code(). +def _spec_from_search(name, search): + """Scan the directory list `search` for name's tail and build a spec. - CPython: Lib/importlib/util.py:90 find_spec + Shared by find_spec and _find_spec_from_path; mirrors the suffix + loop FileFinder.find_spec runs against a single path entry list. + + CPython: Lib/importlib/_bootstrap_external.py:1357 FileFinder.find_spec """ - if name.startswith("."): - if package is None: - raise ValueError("relative module name requires package") - name = resolve_name(name, package) - if name in sys.modules: - mod = sys.modules[name] - spec = getattr(mod, "__spec__", None) - if spec is not None: - return spec - search = _resolve_search_paths(name) if search is None: return None tail = name.rpartition(".")[2] @@ -116,6 +108,49 @@ def find_spec(name, package=None): return None +def find_spec(name, package=None): + """Locate name on sys.path (or the parent package's __path__) and + return a ModuleSpec the caller can drive through .loader.get_code(). + + CPython: Lib/importlib/util.py:90 find_spec + """ + if name.startswith("."): + if package is None: + raise ValueError("relative module name requires package") + name = resolve_name(name, package) + if name in sys.modules: + mod = sys.modules[name] + spec = getattr(mod, "__spec__", None) + if spec is not None: + return spec + return _spec_from_search(name, _resolve_search_paths(name)) + + +def _find_spec_from_path(name, path=None): + """Return the spec for name, searching `path` (or sys.path). + + First sys.modules is checked; if the module is already imported its + __spec__ is returned (None __spec__ raises ValueError). Otherwise the + given path is scanned. Dotted names do not implicitly import their + parents, matching CPython. + + CPython: Lib/importlib/util.py:_find_spec_from_path + """ + if name not in sys.modules: + search = sys.path if path is None else path + return _spec_from_search(name, search) + module = sys.modules[name] + if module is None: + return None + try: + spec = module.__spec__ + except AttributeError: + raise ValueError(f'{name}.__spec__ is not set') from None + if spec is None: + raise ValueError(f'{name}.__spec__ is None') + return spec + + def module_from_spec(spec): """Create a new module based on spec and spec.loader.create_module. From 423544f820c00594f21d92a6f41d27c4bac16123 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 23:03:53 +0700 Subject: [PATCH 07/84] import: attach __spec__/__loader__/__cached__ to loaded modules gopy's import runs Go-side, so modules loaded through PathFinder, the inittab, and the script-as-main entry never picked up the ModuleSpec surface CPython's _init_module_attrs fills in. Tools that introspect a module by name (pyclbr._readmodule, runpy, inspect) read __spec__ and broke on the missing/None attribute. Build the spec by calling importlib.util.spec_from_file_location (file modules) or spec_from_loader (built-ins) once the body has run, mirroring what FileFinder/BuiltinImporter produce. Modules imported before importlib.util itself is importable are queued and flushed the moment it becomes available. The vendored test-as-main module gets a file-location spec so test. matches what regrtest's import produces; plain __main__ keeps __spec__ = None like python script.py. Also force submodule imports for __all__ entries in 'from pkg import *', and vendor the sre_parse/sre_constants/sre_compile deprecation shims plus the pyclbr_input fixture. --- cmd/gopy/main.go | 33 ++++++- imp/import.go | 6 ++ imp/pathfinder.go | 184 +++++++++++++++++++++++++++++++++++ stdlib/sre_compile.py | 7 ++ stdlib/sre_constants.py | 7 ++ stdlib/sre_parse.py | 7 ++ stdlib/test/pyclbr_input.py | 85 ++++++++++++++++ test/cpython/pyclbr_input.py | 85 ++++++++++++++++ vm/eval_import.go | 24 ++++- 9 files changed, 434 insertions(+), 4 deletions(-) create mode 100644 stdlib/sre_compile.py create mode 100644 stdlib/sre_constants.py create mode 100644 stdlib/sre_parse.py create mode 100644 stdlib/test/pyclbr_input.py create mode 100644 test/cpython/pyclbr_input.py diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 1c79b6df..43773aec 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -416,11 +416,36 @@ func runFile(path string, stdout, stderr *os.File) int { return 1 } installPathFinder(path) - mainGlobals := newMainGlobals(g, mainModuleName(path)) + modName := mainModuleName(path) + mainGlobals := newMainGlobals(g, modName) ts := state.NewThread() if rc := bootstrapEncodings(ts, mainGlobals, stderr); rc != 0 { return rc } + // A vendored test runs under "test."; regrtest imports it as a + // normal module, so its __spec__ is a real ModuleSpec. Build the same + // file-location spec here so code that resolves the module by name and + // reads __spec__ (pyclbr, runpy, inspect) matches CPython. The plain + // "__main__" run keeps __spec__ None, like `python script.py`. The + // snippet runs through pythonrun so importlib.util loads under a real + // Executor, the same way bootstrapEncodings drives the encodings import. + // + // CPython: Lib/test/libregrtest/runtest.py (imports test.) + if modName != "__main__" { + abs, absErr := filepath.Abs(path) + if absErr != nil { + abs = path + } + src := fmt.Sprintf("import importlib.util as _u, sys as _s\n"+ + "_m = _s.modules.get(%q)\n"+ + "if _m is not None and getattr(_m, '__spec__', None) is None:\n"+ + " _m.__spec__ = _u.spec_from_file_location(%q, %q)\n"+ + " _m.__loader__ = _m.__spec__.loader\n"+ + "del _u, _s, _m\n", modName, modName, abs) + if _, err := pythonrun.RunString(ts, src, "", parser.ModeFile, mainGlobals, nil); err != nil { + fmt.Fprintln(stderr, "attach main spec:", err) + } + } var rc int if suffix, ok := unittestRunnerSuffix(path); ok { src, readErr := os.ReadFile(path) //nolint:gosec // reading a caller-supplied test file path is the entire contract @@ -557,6 +582,12 @@ func newMainGlobals(builtinsDict *objects.Dict, name string) *objects.Dict { mainDict := objects.NewDict() _ = mainDict.SetItem(objects.NewStr("__name__"), objects.NewStr(name)) _ = mainDict.SetItem(objects.NewStr("__builtins__"), builtinsDict) + // CPython always binds __main__.__spec__: None for `-c`/script runs, + // a real ModuleSpec under `-m`. runFile overwrites this with a + // file-location spec for vendored "test." runs. + // + // CPython: Python/pylifecycle.c init_interp_main (sets __main__.__spec__) + _ = mainDict.SetItem(objects.NewStr("__spec__"), objects.None()) mod := objects.NewModuleWithDict(name, mainDict) if _, ok := imp.GetModule(name); !ok { imp.AddModule(name, mod) diff --git a/imp/import.go b/imp/import.go index 27faf852..aef5601b 100644 --- a/imp/import.go +++ b/imp/import.go @@ -84,6 +84,12 @@ func ImportModuleLevel(exec Executor, name, pkgname string, level int) (*objects // CPython: Objects/moduleobject.c:606 PyModule_AddFunctions mod.StampBuiltinModule() AddModule(absName, mod) + // CPython's BuiltinImporter sets __spec__/__loader__ on every + // built-in module; gopy's inittab path mirrors that so tools + // (pyclbr, runpy, inspect) that read module.__spec__ work. + // + // CPython: Lib/importlib/_bootstrap.py:736 BuiltinImporter.exec_module + AttachBuiltinSpec(exec, mod, absName) return mod, nil } diff --git a/imp/pathfinder.go b/imp/pathfinder.go index bdcc730d..04c1d7d4 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -264,6 +264,7 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam RemoveModule(name) return nil, fmt.Errorf("imp: loadAsPackage %q: exec: %w", name, err) } + attachSpecAttrs(exec, mod, name, initFile, []string{pkgDir}) // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so an `__init__.py` that reassigns its own entry // (rare for packages, but the same shape as decimal/_pydecimal). @@ -304,6 +305,7 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str RemoveModule(name) return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w", name, err) } + attachSpecAttrs(exec, mod, name, file, nil) // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so a module body that reassigns its own entry // (`sys.modules[__name__] = other`, e.g. decimal/_pydecimal) wins. @@ -313,6 +315,188 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str return mod, nil } +// attachSpecAttrs populates the module-namespace surface CPython's +// _init_module_attrs fills from a ModuleSpec: __spec__, __loader__, +// __cached__ and a default __doc__. gopy's import runs Go-side, so the +// spec is built by calling importlib.util.spec_from_file_location once +// the body has run (the same shape CPython's FileFinder produces). +// +// importlib.util is itself a .py module, so the modules loaded before +// (and during) its own import cannot have their spec built yet. Those +// are queued in pendingSpecs and flushed the moment util becomes +// available, so importlib and its early dependencies still end up with +// a __spec__. +// +// CPython: Lib/importlib/_bootstrap.py:516 _init_module_attrs +func attachSpecAttrs(exec Executor, mod *objects.Module, name, origin string, searchLocations []string) { + d := mod.Dict() + // __doc__ defaults to None when the body stored no docstring. + docKey := objects.NewStr("__doc__") + if _, err := d.GetItem(docKey); err != nil { + _ = d.SetItem(docKey, objects.None()) + } + p := pendingSpec{mod: mod, name: name, origin: origin, search: searchLocations} + util, ok := ensureImportlibUtil(exec) + if !ok { + pendingMu.Lock() + pendingSpecs = append(pendingSpecs, p) + pendingMu.Unlock() + return + } + applySpec(util, p) + flushPendingSpecs(util) +} + +// AttachBuiltinSpec gives a built-in (inittab) module the __spec__ / +// __loader__ surface CPython's BuiltinImporter installs: origin +// "built-in", no source, no file. It is deferred just like the +// file-based path when importlib.util is not importable yet. +// +// CPython: Lib/importlib/_bootstrap.py:736 BuiltinImporter.exec_module +func AttachBuiltinSpec(exec Executor, mod *objects.Module, name string) { + d := mod.Dict() + docKey := objects.NewStr("__doc__") + if _, err := d.GetItem(docKey); err != nil { + _ = d.SetItem(docKey, objects.None()) + } + p := pendingSpec{mod: mod, name: name, builtin: true} + util, ok := ensureImportlibUtil(exec) + if !ok { + pendingMu.Lock() + pendingSpecs = append(pendingSpecs, p) + pendingMu.Unlock() + return + } + applySpec(util, p) + flushPendingSpecs(util) +} + +// pendingSpec records a module whose spec could not be built yet because +// importlib.util was not importable at the time. +type pendingSpec struct { + mod *objects.Module + name string + origin string + search []string + builtin bool +} + +var ( + pendingMu sync.Mutex + pendingSpecs []pendingSpec +) + +// flushPendingSpecs drains the deferred-spec queue, building each +// module's spec now that importlib.util is available. +func flushPendingSpecs(util *objects.Module) { + pendingMu.Lock() + queue := pendingSpecs + pendingSpecs = nil + pendingMu.Unlock() + for _, p := range queue { + applySpec(util, p) + } +} + +// applySpec builds a ModuleSpec for p via importlib.util and binds the +// resulting __spec__/__loader__/__cached__ onto the module dict. +// Built-in modules use spec_from_loader with a "built-in" origin; file +// modules use spec_from_file_location. +// +// CPython: Lib/importlib/_bootstrap.py:516 _init_module_attrs +func applySpec(util *objects.Module, p pendingSpec) { + spec := buildSpec(util, p) + if spec == nil { + return + } + d := p.mod.Dict() + _ = d.SetItem(objects.NewStr("__spec__"), spec) + if loader, lerr := objects.GetAttr(spec, objects.NewStr("loader")); lerr == nil { + _ = d.SetItem(objects.NewStr("__loader__"), loader) + } + // __cached__ mirrors spec.cached (None for gopy's bytecode-less load). + if cached, cerr := objects.GetAttr(spec, objects.NewStr("cached")); cerr == nil { + _ = d.SetItem(objects.NewStr("__cached__"), cached) + } else { + _ = d.SetItem(objects.NewStr("__cached__"), objects.None()) + } +} + +// buildSpec calls the appropriate importlib.util constructor for p. +func buildSpec(util *objects.Module, p pendingSpec) objects.Object { + if p.builtin { + fn, err := util.Dict().GetItem(objects.NewStr("spec_from_loader")) + if err != nil { + return nil + } + kwargs := objects.NewDict() + _ = kwargs.SetItem(objects.NewStr("origin"), objects.NewStr("built-in")) + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.None()}) + spec, cerr := objects.Call(fn, args, kwargs) + if cerr != nil || spec == objects.None() { + return nil + } + return spec + } + fn, err := util.Dict().GetItem(objects.NewStr("spec_from_file_location")) + if err != nil { + return nil + } + kwargs := objects.NewDict() + if p.search != nil { + items := make([]objects.Object, len(p.search)) + for i, s := range p.search { + items[i] = objects.NewStr(s) + } + _ = kwargs.SetItem(objects.NewStr("submodule_search_locations"), + objects.NewList(items)) + } + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.NewStr(p.origin)}) + spec, cerr := objects.Call(fn, args, kwargs) + if cerr != nil || spec == objects.None() { + return nil + } + return spec +} + +var ( + specBootstrapMu sync.Mutex + specBootstrapped bool +) + +// ensureImportlibUtil returns the importlib.util module, importing it on +// first use. The lazy import is guarded by specBootstrapped so the +// modules pulled in by importlib.util's own load (os, types, +// importlib._bootstrap_external) do not re-enter and recurse while that +// import is still in flight. +func ensureImportlibUtil(exec Executor) (*objects.Module, bool) { + if util, ok := GetModule("importlib.util"); ok { + // util is registered before its body runs, so a mid-import + // lookup sees the module without spec_from_file_location yet. + // Treat that partial state as "not ready" so the caller defers + // rather than flushing the pending queue against a stub. + if _, err := util.Dict().GetItem(objects.NewStr("spec_from_file_location")); err == nil { + return util, true + } + return nil, false + } + specBootstrapMu.Lock() + if specBootstrapped { + specBootstrapMu.Unlock() + return nil, false + } + specBootstrapped = true + specBootstrapMu.Unlock() + util, err := ImportModule(exec, "importlib.util") + specBootstrapMu.Lock() + specBootstrapped = false + specBootstrapMu.Unlock() + if err != nil { + return nil, false + } + return util, true +} + // isFile reports whether path exists and is a regular file. It is the // gopy stand-in for importlib's _path_isfile helper. // diff --git a/stdlib/sre_compile.py b/stdlib/sre_compile.py new file mode 100644 index 00000000..f9da61e6 --- /dev/null +++ b/stdlib/sre_compile.py @@ -0,0 +1,7 @@ +import warnings +warnings.warn(f"module {__name__!r} is deprecated", + DeprecationWarning, + stacklevel=2) + +from re import _compiler as _ +globals().update({k: v for k, v in vars(_).items() if k[:2] != '__'}) diff --git a/stdlib/sre_constants.py b/stdlib/sre_constants.py new file mode 100644 index 00000000..fa09d044 --- /dev/null +++ b/stdlib/sre_constants.py @@ -0,0 +1,7 @@ +import warnings +warnings.warn(f"module {__name__!r} is deprecated", + DeprecationWarning, + stacklevel=2) + +from re import _constants as _ +globals().update({k: v for k, v in vars(_).items() if k[:2] != '__'}) diff --git a/stdlib/sre_parse.py b/stdlib/sre_parse.py new file mode 100644 index 00000000..25a3f557 --- /dev/null +++ b/stdlib/sre_parse.py @@ -0,0 +1,7 @@ +import warnings +warnings.warn(f"module {__name__!r} is deprecated", + DeprecationWarning, + stacklevel=2) + +from re import _parser as _ +globals().update({k: v for k, v in vars(_).items() if k[:2] != '__'}) diff --git a/stdlib/test/pyclbr_input.py b/stdlib/test/pyclbr_input.py new file mode 100644 index 00000000..5535edbf --- /dev/null +++ b/stdlib/test/pyclbr_input.py @@ -0,0 +1,85 @@ +"""Test cases for test_pyclbr.py""" + +def f(): pass + +class Other(object): + @classmethod + def foo(c): pass + + def om(self): pass + +class B (object): + def bm(self): pass + +class C (B): + d = 10 + + # This one is correctly considered by both test_pyclbr.py and pyclbr.py + # as a non-method of C. + foo = Other().foo + + # This causes test_pyclbr.py to fail, but only because the + # introspection-based is_method() code in the test can't + # distinguish between this and a genuine method function like m(). + # + # The pyclbr.py module gets this right as it parses the text. + om = Other.om + f = f + + def m(self): pass + + @staticmethod + def sm(self): pass + + @classmethod + def cm(self): pass + +# Check that mangling is correctly handled + +class a: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class _: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class __: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class ___: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class _a: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class __a: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass diff --git a/test/cpython/pyclbr_input.py b/test/cpython/pyclbr_input.py new file mode 100644 index 00000000..5535edbf --- /dev/null +++ b/test/cpython/pyclbr_input.py @@ -0,0 +1,85 @@ +"""Test cases for test_pyclbr.py""" + +def f(): pass + +class Other(object): + @classmethod + def foo(c): pass + + def om(self): pass + +class B (object): + def bm(self): pass + +class C (B): + d = 10 + + # This one is correctly considered by both test_pyclbr.py and pyclbr.py + # as a non-method of C. + foo = Other().foo + + # This causes test_pyclbr.py to fail, but only because the + # introspection-based is_method() code in the test can't + # distinguish between this and a genuine method function like m(). + # + # The pyclbr.py module gets this right as it parses the text. + om = Other.om + f = f + + def m(self): pass + + @staticmethod + def sm(self): pass + + @classmethod + def cm(self): pass + +# Check that mangling is correctly handled + +class a: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class _: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class __: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class ___: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class _a: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass + +class __a: + def a(self): pass + def _(self): pass + def _a(self): pass + def __(self): pass + def ___(self): pass + def __a(self): pass diff --git a/vm/eval_import.go b/vm/eval_import.go index b3597f3a..dfbc6c4e 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -309,9 +309,27 @@ func (e *evalState) importStar(from objects.Object) error { if skipUnder && name != "" && name[0] == '_' { continue } - val, verr := objects.GetAttr(from, objects.NewStr(name)) - if verr != nil { - return verr + var val objects.Object + if skipUnder { + // __dict__ fallback: the attribute is already bound. + v, verr := objects.GetAttr(from, objects.NewStr(name)) + if verr != nil { + return verr + } + val = v + } else { + // An __all__ entry may name a submodule that no IMPORT_NAME + // has pulled in yet. CPython runs _handle_fromlist over the + // fromlist before import_all_from copies the attributes; + // gopy lacks that pass, so force-import here the same way + // evalImportFrom does for named `from pkg import sub`. + // + // CPython: Lib/importlib/_bootstrap.py:1463 _handle_fromlist + v, verr := evalImportFrom(e, from, name) + if verr != nil { + return verr + } + val = v } serr := dst.SetItem(objects.NewStr(name), val) // CPython: Python/ceval.c import_star_from — always releases the From 9d611fb360ee418c084f5c5c4fcdeb0b2b0177f8 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 23:13:33 +0700 Subject: [PATCH 08/84] importlib: port the real ModuleSpec with parent/has_location/cached The machinery.ModuleSpec and util._ModuleSpec stubs diverged from CPython: no parent property, no has_location/cached descriptors, no __repr__/__eq__. runpy._run_code reads mod_spec.parent and tools compare specs, so the stubs broke. Replace both with a faithful port of importlib._bootstrap.ModuleSpec (gopy keeps it in machinery since the bootstrap is Go-side) and have importlib.util import it. spec_from_file_location now follows _bootstrap_external: abspath the location, set _set_fileattr, derive submodule_search_locations from the loader. Add _get_cached to _bootstrap_external for the cached property. The abspath call tolerates posixpath still being mid-import during the bootstrap spec flush. --- stdlib/importlib/_bootstrap_external.py | 13 +++++ stdlib/importlib/machinery.py | 65 +++++++++++++++++++++++-- stdlib/importlib/util.py | 57 ++++++++++++---------- 3 files changed, 105 insertions(+), 30 deletions(-) diff --git a/stdlib/importlib/_bootstrap_external.py b/stdlib/importlib/_bootstrap_external.py index 6b6686ea..83b6e404 100644 --- a/stdlib/importlib/_bootstrap_external.py +++ b/stdlib/importlib/_bootstrap_external.py @@ -351,6 +351,19 @@ def cache_from_source(path, debug_override=None, *, optimization=None): return _path_join(head, _PYCACHE, filename) +# CPython: Lib/importlib/_bootstrap_external.py:369 _get_cached +def _get_cached(filename): + if filename.endswith(tuple(SOURCE_SUFFIXES)): + try: + return cache_from_source(filename) + except NotImplementedError: + pass + elif filename.endswith(tuple(BYTECODE_SUFFIXES)): + return filename + else: + return None + + # CPython: Lib/importlib/_bootstrap_external.py:310 source_from_cache def source_from_cache(path): """Given the path to a .pyc. file, return the path to its .py file. diff --git a/stdlib/importlib/machinery.py b/stdlib/importlib/machinery.py index e593f2bb..3d079a0f 100644 --- a/stdlib/importlib/machinery.py +++ b/stdlib/importlib/machinery.py @@ -41,7 +41,15 @@ def __init__(self, path, *loader_details): class ModuleSpec: - """Minimal stand-in for importlib.machinery.ModuleSpec.""" + """The specification for a module, used for loading. + + A faithful port of importlib._bootstrap.ModuleSpec. CPython defines + the class in _bootstrap and re-exports it through machinery; gopy's + bootstrap is Go-side, so the class lives here and importlib.util + imports it from machinery. + + CPython: Lib/importlib/_bootstrap.py:565 ModuleSpec + """ def __init__(self, name, loader, *, origin=None, loader_state=None, is_package=None): @@ -50,8 +58,59 @@ def __init__(self, name, loader, *, origin=None, loader_state=None, self.origin = origin self.loader_state = loader_state self.submodule_search_locations = [] if is_package else None - self.has_location = origin is not None - self.cached = None + self._uninitialized_submodules = [] + + # file-location attributes + self._set_fileattr = False + self._cached = None + + def __repr__(self): + args = [f'name={self.name!r}', f'loader={self.loader!r}'] + if self.origin is not None: + args.append(f'origin={self.origin!r}') + if self.submodule_search_locations is not None: + args.append(f'submodule_search_locations={self.submodule_search_locations}') + return f'{self.__class__.__name__}({", ".join(args)})' + + def __eq__(self, other): + smsl = self.submodule_search_locations + try: + return (self.name == other.name and + self.loader == other.loader and + self.origin == other.origin and + smsl == other.submodule_search_locations and + self.cached == other.cached and + self.has_location == other.has_location) + except AttributeError: + return NotImplemented + + @property + def cached(self): + if self._cached is None: + if self.origin is not None and self._set_fileattr: + from importlib import _bootstrap_external + self._cached = _bootstrap_external._get_cached(self.origin) + return self._cached + + @cached.setter + def cached(self, cached): + self._cached = cached + + @property + def parent(self): + """The name of the module's parent.""" + if self.submodule_search_locations is None: + return self.name.rpartition('.')[0] + else: + return self.name + + @property + def has_location(self): + return self._set_fileattr + + @has_location.setter + def has_location(self, value): + self._set_fileattr = bool(value) __all__ = [ diff --git a/stdlib/importlib/util.py b/stdlib/importlib/util.py index fdd8e19b..1211ba7c 100644 --- a/stdlib/importlib/util.py +++ b/stdlib/importlib/util.py @@ -22,6 +22,7 @@ source_from_cache, source_hash, ) +from importlib.machinery import ModuleSpec class _SourceFileLoader: @@ -50,22 +51,6 @@ def get_code(self, fullname): return compile(source, self.path, "exec") -class _ModuleSpec: - """Stripped-down ModuleSpec mirroring importlib.machinery.ModuleSpec. - - CPython: Lib/importlib/_bootstrap.py:392 ModuleSpec - """ - - def __init__(self, name, loader, *, origin=None, is_package=False): - self.name = name - self.loader = loader - self.origin = origin - self.submodule_search_locations = [] if is_package else None - self.has_location = origin is not None - self.cached = None - self.parent = name.rpartition(".")[0] if is_package else name.rpartition(".")[0] - - def _resolve_search_paths(name): parent, _, _ = name.rpartition(".") if not parent: @@ -97,14 +82,14 @@ def _spec_from_search(name, search): directory = entry if entry else "." pkg_init = os.path.join(directory, tail, "__init__.py") if os.path.isfile(pkg_init): - loader = _SourceFileLoader(name, pkg_init) - spec = _ModuleSpec(name, loader, origin=pkg_init, is_package=True) - spec.submodule_search_locations = [os.path.join(directory, tail)] - return spec + return spec_from_file_location( + name, pkg_init, + loader=_SourceFileLoader(name, pkg_init), + submodule_search_locations=[os.path.join(directory, tail)]) mod_file = os.path.join(directory, tail + ".py") if os.path.isfile(mod_file): - return _ModuleSpec(name, _SourceFileLoader(name, mod_file), - origin=mod_file) + return spec_from_file_location( + name, mod_file, loader=_SourceFileLoader(name, mod_file)) return None @@ -190,24 +175,42 @@ def spec_from_loader(name, loader, *, origin=None, is_package=None): is_package = False else: is_package = False - return _ModuleSpec(name, loader, origin=origin, is_package=bool(is_package)) + return ModuleSpec(name, loader, origin=origin, is_package=bool(is_package)) def spec_from_file_location(name, location=None, *, loader=None, submodule_search_locations=None): """Return a ModuleSpec for the specified module, using file location. - CPython: Lib/importlib/util.py:132 spec_from_file_location + CPython: Lib/importlib/_bootstrap_external.py:560 spec_from_file_location """ if location is None and loader is None: return None if loader is None and location is not None: loader = _SourceFileLoader(name, str(location)) - origin = str(location) if location is not None else getattr(loader, 'path', None) - is_package = submodule_search_locations is not None - spec = _ModuleSpec(name, loader, origin=origin, is_package=is_package) + if location is not None: + location = os.fspath(location) + try: + location = os.path.abspath(location) + except (OSError, AttributeError): + # AttributeError: os.path (posixpath) can still be mid-import + # when a deferred spec is flushed during interpreter bootstrap, + # so abspath is not bound yet. The unnormalized path is fine. + pass + origin = location if location is not None else getattr(loader, 'path', None) + spec = ModuleSpec(name, loader, origin=origin) + spec._set_fileattr = True if submodule_search_locations is not None: spec.submodule_search_locations = list(submodule_search_locations) + elif submodule_search_locations is None and hasattr(loader, 'is_package'): + try: + if loader.is_package(name): + spec.submodule_search_locations = [] + except ImportError: + pass + if spec.submodule_search_locations == []: + if origin: + spec.submodule_search_locations.append(os.path.split(origin)[0]) return spec From 6c9b764e4f1be2d79d16cd59aa48210581f01d84 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 23:34:14 +0700 Subject: [PATCH 09/84] runpy: import-system surface, SIGINT exit, namespace packages Drive test_runpy to parity with CPython 3.14: - sys.dont_write_bytecode/path_hooks/path_importer_cache top-level attrs - ModuleNotFoundError carries name= through the import miss path so runpy._get_module_details can keep searching dotted names - subprocess cwd accepts path-like (PyUnicode_FSConverter parity) - propagate GOPY_STDLIB to child interpreters so subprocess.run with a changed cwd still bootstraps encodings - exit via SIG_DFL SIGINT on unhandled KeyboardInterrupt (bpo-1054041) - PEP 420 namespace packages on the Go and Python find paths - _testinternalcapi.get_recursion_depth --- cmd/gopy/main.go | 41 +++++++++- errors/api.go | 24 ++++++ errors/exc_import_init.go | 49 ++++++++++++ errors/systemexit.go | 18 +++++ imp/pathfinder.go | 116 +++++++++++++++++++++++++++-- module/_posixsubprocess/module.go | 34 +++++++-- module/_testinternalcapi/module.go | 29 +++++++- module/sys/config.go | 6 ++ module/sys/sys.go | 17 +++++ stdlib/importlib/machinery.py | 57 +++++++++++++- stdlib/importlib/util.py | 16 ++++ vm/builtins_hook.go | 10 +++ vm/eval_helpers.go | 3 +- vm/eval_import.go | 3 +- 14 files changed, 401 insertions(+), 22 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 43773aec..9e718780 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -9,14 +9,17 @@ import ( "bytes" "fmt" "os" + "os/signal" "path/filepath" "runtime/pprof" "strings" + "syscall" "github.com/tamnd/gopy/build" "github.com/tamnd/gopy/builtins" "github.com/tamnd/gopy/codecs" "github.com/tamnd/gopy/compile" + pyerrors "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/getopt" "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/module/gc" @@ -58,7 +61,32 @@ func mainWithProfile() int { _ = f.Close() }() } - return run(os.Args[1:], os.Stdout, os.Stderr) + exitcode := run(os.Args[1:], os.Stdout, os.Stderr) + // bpo-1054041: if a KeyboardInterrupt went unhandled, exit through + // the default SIGINT handler so a calling shell sees the ^C and the + // process reports death-by-signal rather than a plain error code. + // + // CPython: Modules/main.c:786 Py_RunMain (unhandled_keyboard_interrupt) + if pyerrors.UnhandledKeyboardInterrupt() { + exitcode = exitSigint() + } + return exitcode +} + +// exitSigint resets SIGINT to its default disposition and delivers it +// to this process, so an unhandled KeyboardInterrupt terminates the +// interpreter by signal (exit status -SIGINT / 128+SIGINT). +// +// CPython: Modules/main.c:730 exit_sigint +func exitSigint() int { + signal.Reset(syscall.SIGINT) + if err := syscall.Kill(syscall.Getpid(), syscall.SIGINT); err != nil { + // Impossible in normal environments; fall back to the code + // CPython returns when the signal could not be delivered. + return int(syscall.SIGINT) + 128 + } + // Give the signal a moment to be delivered before falling through. + select {} } // run drives _PyOS_GetOpt the same way pymain_init walks argv before @@ -195,6 +223,17 @@ func installPathFinder(scriptPath string) { } if root := findStdlibRoot(); root != "" { paths = append(paths, root) + // Pin the resolved root into the environment so any subprocess + // this interpreter spawns through sys.executable bootstraps from + // the same stdlib, even when it runs in an unrelated cwd (e.g. + // subprocess.run(cwd=tmpdir)). CPython's child interpreters + // self-locate from the executable's prefix; gopy carries it + // explicitly via GOPY_STDLIB. + // + // CPython: Modules/getpath.py:550 calculate_path (prefix inherited) + if os.Getenv("GOPY_STDLIB") == "" { + _ = os.Setenv("GOPY_STDLIB", root) + } } imp.SetPathFinder(&imp.PathFinder{ Paths: paths, diff --git a/errors/api.go b/errors/api.go index 86994b35..f42fadc3 100644 --- a/errors/api.go +++ b/errors/api.go @@ -24,6 +24,30 @@ func SetString(ts *state.Thread, t *objects.Type, msg string) { Set(ts, t, args) } +// MakeModuleNotFound builds (without raising) a ModuleNotFoundError +// instance carrying the `name` member, so a caller that returns it as a +// Go error preserves the attribute through synthesizeException. +// +// CPython: Python/import.c:1759 import_name (ModuleNotFoundError, name=) +func MakeModuleNotFound(name string) *Exception { + msg := "No module named '" + name + "'" + exc := New(PyExc_ModuleNotFoundError, objects.NewTuple([]objects.Object{objects.NewStr(msg)})) + _ = exc.EnsureAttrDict().SetItem(objects.NewStr("name"), objects.NewStr(name)) + return exc +} + +// SetModuleNotFound raises ModuleNotFoundError("No module named %r", +// name=name), stamping the `name` member the import machinery promises +// on every miss so callers like runpy can read exc.name. +// +// CPython: Python/import.c:1759 import_name (ModuleNotFoundError, name=) +func SetModuleNotFound(ts *state.Thread, name string) { + msg := "No module named '" + name + "'" + exc := New(PyExc_ModuleNotFoundError, objects.NewTuple([]objects.Object{objects.NewStr(msg)})) + _ = exc.EnsureAttrDict().SetItem(objects.NewStr("name"), objects.NewStr(name)) + Raise(ts, exc) +} + // Format raises an exception built from a printf-style template. // Returns nil so callers can `return errors.Format(ts, ...)`. // diff --git a/errors/exc_import_init.go b/errors/exc_import_init.go index 2e22359f..e5de6bc5 100644 --- a/errors/exc_import_init.go +++ b/errors/exc_import_init.go @@ -21,6 +21,55 @@ func init() { objects.SetTypeDescr(PyExc_ImportError, "__init__", objects.NewMethodDescr(PyExc_ImportError, "__init__", importErrorInit). WithKwParams("ImportError", importErrorKwlist, len(importErrorKwlist))) + + // name / path / name_from are Py_T_OBJECT members on + // PyImportErrorObject: reading a member that was never set yields + // None rather than raising AttributeError, and writing stores the + // value. runpy/importlib both read e.name on a caught ImportError, + // so the attribute must always exist. + // + // CPython: Objects/exceptions.c:1893 ImportError_members + for _, name := range importErrorKwlist { + field := name + objects.SetTypeDescr(PyExc_ImportError, field, objects.NewGetSetDescr(field, + func(o objects.Object) (objects.Object, error) { return importErrorMember(o, field) }, + func(o, v objects.Object) error { return importErrorMemberSet(o, field, v) })) + } +} + +// importErrorMember reads an ImportError member from the instance attr +// dict, returning None when unset to mirror Py_T_OBJECT's NULL->None. +// +// CPython: Include/descrobject.h Py_T_OBJECT (member_get NULL -> None) +func importErrorMember(o objects.Object, field string) (objects.Object, error) { + e, ok := o.(*Exception) + if !ok { + return objects.None(), nil + } + d := e.AttrDict() + if d == nil { + return objects.None(), nil + } + v, err := d.GetItem(objects.NewStr(field)) + if err != nil || v == nil { + return objects.None(), nil + } + return v, nil +} + +// importErrorMemberSet writes an ImportError member through the +// instance attr dict, allocating it lazily. +// +// CPython: Objects/exceptions.c:1893 ImportError_members (member_set) +func importErrorMemberSet(o objects.Object, field string, v objects.Object) error { + e, ok := o.(*Exception) + if !ok { + return nil + } + if v == nil { + v = objects.None() + } + return e.EnsureAttrDict().SetItem(objects.NewStr(field), v) } // importErrorInit ports ImportError_init: it runs BaseException_init over diff --git a/errors/systemexit.go b/errors/systemexit.go index 9915b7b0..0448dc17 100644 --- a/errors/systemexit.go +++ b/errors/systemexit.go @@ -8,6 +8,23 @@ import ( "github.com/tamnd/gopy/state" ) +// unhandledKeyboardInterrupt records that a KeyboardInterrupt reached +// the top-level print path. Modules/main.c reads the matching runtime +// flag after Py_RunMain and re-raises SIGINT so the process dies by +// signal (exit status -SIGINT) rather than a plain non-zero code. +// +// CPython: Python/pythonrun.c:625 unhandled_keyboard_interrupt store +var unhandledKeyboardInterrupt bool + +// UnhandledKeyboardInterrupt reports whether a KeyboardInterrupt was +// surfaced to the top-level handler since the last reset. The CLI +// entry point consults it to decide whether to exit via SIGINT. +// +// CPython: Modules/main.c:786 _PyRuntime.signals.unhandled_keyboard_interrupt +func UnhandledKeyboardInterrupt() bool { + return unhandledKeyboardInterrupt +} + // HandleSystemExit inspects the current exception. If it is a // SystemExit, the exit code is read off the args and the exception // is cleared; the caller propagates the code. KeyboardInterrupt is @@ -26,6 +43,7 @@ func HandleSystemExit(ts *state.Thread) (code int, handled bool) { return 0, false } if Match(exc, PyExc_KeyboardInterrupt) { + unhandledKeyboardInterrupt = true return 0, false } if !Match(exc, PyExc_SystemExit) { diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 04c1d7d4..a94e04a1 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -116,6 +116,15 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er search = paths } + // PEP 420: a directory matching the tail with no __init__.py and no + // flat-file match is a namespace portion. CPython's PathFinder + // accumulates portions across every path entry and, only after no + // regular module is found anywhere, builds a namespace package whose + // __path__ is the collected portions. + // + // CPython: Lib/importlib/_bootstrap_external.py:1430 FileFinder.find_spec + // (namespace portion path) / Lib/importlib/_bootstrap.py:1167 PathFinder + var namespacePortions []string for _, entry := range search { dir := entry if dir == "" { @@ -144,6 +153,14 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er bindOnParent(parent, tail, mod) return mod, nil } + if isDir(pkgDir) { + namespacePortions = append(namespacePortions, pkgDir) + } + } + if len(namespacePortions) > 0 { + mod := loadAsNamespace(exec, name, parent, namespacePortions) + bindOnParent(parent, tail, mod) + return mod, nil } return nil, fmt.Errorf("%w: %s", errFinderMiss, name) } @@ -274,6 +291,35 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam return mod, nil } +// loadAsNamespace builds a PEP 420 namespace package: a module with no +// __file__, a __path__ spanning every contributing directory, and a +// namespace __spec__ (loader None, origin None). The body is never +// executed because a namespace package has no __init__.py. +// +// CPython: Lib/importlib/_bootstrap.py:573 module_from_spec (namespace) / +// Lib/importlib/_bootstrap_external.py:1230 NamespaceLoader +func loadAsNamespace(exec Executor, name, parent string, portions []string) *objects.Module { + mod, exists := GetModule(name) + if !exists { + mod = objects.NewModule(name) + } + d := mod.Dict() + items := make([]objects.Object, len(portions)) + for i, s := range portions { + items[i] = objects.NewStr(s) + } + _ = d.SetItem(objects.NewStr("__path__"), objects.NewList(items)) + _ = d.SetItem(objects.NewStr("__package__"), objects.NewStr(name)) + _ = d.SetItem(objects.NewStr("__file__"), objects.None()) + if _, err := d.GetItem(objects.NewStr("__doc__")); err != nil { + _ = d.SetItem(objects.NewStr("__doc__"), objects.None()) + } + _ = parent + AddModule(name, mod) + attachNamespaceSpec(exec, mod, name, portions) + return mod +} + // loadAsModule is the flat-file equivalent: load source, set // __file__ and __package__ (which is the parent dotted name, or "" // for top-level), then exec. @@ -347,6 +393,24 @@ func attachSpecAttrs(exec Executor, mod *objects.Module, name, origin string, se flushPendingSpecs(util) } +// attachNamespaceSpec binds a PEP 420 namespace ModuleSpec (loader None, +// origin None, submodule_search_locations = the portions) onto mod. Like +// the file path it defers when importlib.util is not importable yet. +// +// CPython: Lib/importlib/_bootstrap.py:573 module_from_spec (namespace) +func attachNamespaceSpec(exec Executor, mod *objects.Module, name string, portions []string) { + p := pendingSpec{mod: mod, name: name, search: portions, namespace: true} + util, ok := ensureImportlibUtil(exec) + if !ok { + pendingMu.Lock() + pendingSpecs = append(pendingSpecs, p) + pendingMu.Unlock() + return + } + applySpec(util, p) + flushPendingSpecs(util) +} + // AttachBuiltinSpec gives a built-in (inittab) module the __spec__ / // __loader__ surface CPython's BuiltinImporter installs: origin // "built-in", no source, no file. It is deferred just like the @@ -374,11 +438,12 @@ func AttachBuiltinSpec(exec Executor, mod *objects.Module, name string) { // pendingSpec records a module whose spec could not be built yet because // importlib.util was not importable at the time. type pendingSpec struct { - mod *objects.Module - name string - origin string - search []string - builtin bool + mod *objects.Module + name string + origin string + search []string + builtin bool + namespace bool } var ( @@ -424,6 +489,34 @@ func applySpec(util *objects.Module, p pendingSpec) { // buildSpec calls the appropriate importlib.util constructor for p. func buildSpec(util *objects.Module, p pendingSpec) objects.Object { + if p.namespace { + // A PEP 420 namespace spec: loader None, origin None, the + // portions as submodule_search_locations. machinery.ModuleSpec + // is the faithful constructor; util re-exports it. + // + // CPython: Lib/importlib/_bootstrap.py:573 module_from_spec + machinery, ok := GetModule("importlib.machinery") + if !ok { + return nil + } + ctor, err := machinery.Dict().GetItem(objects.NewStr("ModuleSpec")) + if err != nil { + return nil + } + kwargs := objects.NewDict() + _ = kwargs.SetItem(objects.NewStr("is_package"), objects.True()) + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.None()}) + spec, cerr := objects.Call(ctor, args, kwargs) + if cerr != nil || spec == objects.None() { + return nil + } + items := make([]objects.Object, len(p.search)) + for i, s := range p.search { + items[i] = objects.NewStr(s) + } + _ = objects.SetAttr(spec, objects.NewStr("submodule_search_locations"), objects.NewList(items)) + return spec + } if p.builtin { fn, err := util.Dict().GetItem(objects.NewStr("spec_from_loader")) if err != nil { @@ -509,6 +602,19 @@ func isFile(path string) bool { return info.Mode().IsRegular() } +// isDir reports whether path exists and is a directory. It is the gopy +// stand-in for importlib's _path_isdir helper used by namespace-portion +// detection. +// +// CPython: Lib/importlib/_bootstrap_external.py:153 _path_isdir +func isDir(path string) bool { + info, err := os.Stat(path) + if err != nil { + return false + } + return info.IsDir() +} + var ( pathFinderMu sync.RWMutex pathFinder *PathFinder diff --git a/module/_posixsubprocess/module.go b/module/_posixsubprocess/module.go index eaddc7dd..99c71a0a 100644 --- a/module/_posixsubprocess/module.go +++ b/module/_posixsubprocess/module.go @@ -88,14 +88,17 @@ func forkExec(args []objects.Object, _ map[string]objects.Object) (objects.Objec executable = execs[0] } - // args[4]: cwd - string or None + // args[4]: cwd - PyUnicode_FSConverter accepts str, bytes, or any + // os.PathLike (pathlib.Path), so subprocess.run(cwd=Path(...)) works. + // + // CPython: Modules/_posixsubprocess.c subprocess_fork_exec ("O&" cwd_obj) cwd := "" if args[4] != nil && args[4] != objects.None() { - s, ok := args[4].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: cwd must be str or None") + s, err := fsConvert(args[4]) + if err != nil { + return nil, err } - cwd = s.Value() + cwd = s } // args[5]: env_list - list of "KEY=VALUE" strings or None. @@ -228,6 +231,27 @@ func objectToString(obj objects.Object) (string, error) { } } +// fsConvert mirrors PyUnicode_FSConverter: it accepts a str, bytes, or +// any os.PathLike (pathlib.Path) by invoking __fspath__ and recursing. +// +// CPython: Modules/posixmodule.c PyUnicode_FSConverter / PyOS_FSPath +func fsConvert(obj objects.Object) (string, error) { + switch v := obj.(type) { + case *objects.Unicode: + return v.Value(), nil + case *objects.Bytes: + return string(v.Bytes()), nil + } + if fspath, err := objects.GetAttr(obj, objects.NewStr("__fspath__")); err == nil { + result, err := objects.CallNoArgs(fspath) + if err != nil { + return "", err + } + return fsConvert(result) + } + return "", fmt.Errorf("TypeError: cwd must be str or None") +} + // toIntFd extracts a file descriptor integer from a Python int object. // Returns -1 for None or out-of-range values, matching CPython's convention. // diff --git a/module/_testinternalcapi/module.go b/module/_testinternalcapi/module.go index 993534b7..3d1fd187 100644 --- a/module/_testinternalcapi/module.go +++ b/module/_testinternalcapi/module.go @@ -12,6 +12,7 @@ import ( "fmt" "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/module/sys" "github.com/tamnd/gopy/objects" ) @@ -31,6 +32,7 @@ func buildModule() (*objects.Module, error) { {"has_split_table", hasSplitTable}, {"get_static_builtin_types", getStaticBuiltinTypes}, {"identify_type_slot_wrappers", identifyTypeSlotWrappers}, + {"get_recursion_depth", getRecursionDepth}, } for _, f := range fns { if err := d.SetItem(objects.NewStr(f.name), objects.NewBuiltinFunction(f.name, f.fn)); err != nil { @@ -64,6 +66,24 @@ func buildModule() (*objects.Module, error) { return m, nil } +// getRecursionDepth returns the Python recursion depth of the caller, +// matching tstate->py_recursion_limit - tstate->py_recursion_remaining. +// gopy tracks depth by the active interpreter-frame chain, so the count +// of frames from the caller back to the root is the same quantity. The +// C probe pushes no Python frame, so the caller's frame is the base. +// +// CPython: Modules/_testinternalcapi.c:110 get_recursion_depth +func getRecursionDepth(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if sys.CurrentInterpreterFrameHook == nil { + return objects.NewInt(0), nil + } + depth := int64(0) + for f := sys.CurrentInterpreterFrameHook(); f != nil; f = f.FrameBack() { + depth++ + } + return objects.NewInt(depth), nil +} + // hasInlineValues reports whether obj currently keeps its attributes in // the type's inline-values array. It mirrors the C probe: the owning type // must carry Py_TPFLAGS_INLINE_VALUES and the instance's value array must @@ -89,7 +109,8 @@ func hasInlineValues(args []objects.Object, _ map[string]objects.Object) (object // inheritance across the static type set. // // CPython: Modules/_testinternalcapi.c:2334 get_static_builtin_types -// (Objects/typeobject.c _PyStaticType_GetBuiltins) +// +// (Objects/typeobject.c _PyStaticType_GetBuiltins) func getStaticBuiltinTypes(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { types := []*objects.Type{ objects.ObjectType(), objects.TypeType(), @@ -112,7 +133,8 @@ func getStaticBuiltinTypes(_ []objects.Object, _ map[string]objects.Object) (obj // resolve to a wrapper_descriptor on that type. // // CPython: Objects/typeobject.c:11494 _PyType_GetSlotWrapperNames -// (Objects/typeobject.c:10952 slotdefs) +// +// (Objects/typeobject.c:10952 slotdefs) var slotWrapperNames = []string{ "__getattribute__", "__getattr__", "__setattr__", "__delattr__", "__repr__", "__hash__", "__call__", "__str__", @@ -137,7 +159,8 @@ var slotWrapperNames = []string{ // slotdefs table. // // CPython: Modules/_testinternalcapi.c:2341 identify_type_slot_wrappers -// (Objects/typeobject.c:11494 _PyType_GetSlotWrapperNames) +// +// (Objects/typeobject.c:11494 _PyType_GetSlotWrapperNames) func identifyTypeSlotWrappers(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { items := make([]objects.Object, len(slotWrapperNames)) for i, n := range slotWrapperNames { diff --git a/module/sys/config.go b/module/sys/config.go index f9552e1e..bf5aefad 100644 --- a/module/sys/config.go +++ b/module/sys/config.go @@ -61,6 +61,12 @@ func UpdateConfig(d *objects.Dict, cfg *initconfig.PyConfig) error { } } + // CPython: Python/sysmodule.c sets sys.dont_write_bytecode from the + // config alongside the flags structseq mirror. + if err := setItem(d, "dont_write_bytecode", objects.NewBool(cfg.WriteBytecode == 0)); err != nil { + return err + } + if cfg.PycachePrefix != "" { if err := setStr(d, "pycache_prefix", cfg.PycachePrefix); err != nil { return err diff --git a/module/sys/sys.go b/module/sys/sys.go index bc68d268..c15919db 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -120,6 +120,23 @@ func Init() (*objects.Dict, error) { return nil, err } + // Import-system state the runtime exposes at the top level. CPython + // stamps these in PySys_Create / the import bootstrap; runpy and + // pkgutil read them directly. gopy's import is Go-side so the hooks + // list and the importer cache stay empty, and bytecode is never + // written, but the attributes must exist with the right types. + // + // CPython: Python/sysmodule.c _PySys_AddObject path_hooks/path_importer_cache + if err := setItem(d, "dont_write_bytecode", objects.NewBool(true)); err != nil { + return nil, err + } + if err := setItem(d, "path_hooks", objects.NewList(nil)); err != nil { + return nil, err + } + if err := setItem(d, "path_importer_cache", objects.NewDict()); err != nil { + return nil, err + } + return d, nil } diff --git a/stdlib/importlib/machinery.py b/stdlib/importlib/machinery.py index 3d079a0f..66201a6b 100644 --- a/stdlib/importlib/machinery.py +++ b/stdlib/importlib/machinery.py @@ -30,15 +30,46 @@ def all_suffixes(): class FileFinder: - """Stub: gopy's import system is Go-side; pkgutil registers an - iterator against FileFinder but it's only consulted when the - user walks a package, which the spec 1711 test path doesn't. + """File-based finder for a single directory. + + gopy's import statement is resolved Go-side, so FileFinder is not on + the meta-path. It still has to exist as a sys.path_hooks entry: + pkgutil.get_importer / runpy.run_path call the hook on a path item + and treat a non-None result as "this is an importable directory". + The find_spec scan mirrors CPython closely enough for pkgutil's + iter_modules / walk_packages to enumerate a directory's contents. + + CPython: Lib/importlib/_bootstrap_external.py:1322 FileFinder """ def __init__(self, path, *loader_details): - self.path = path + self.path = path or '.' self._loaders = loader_details + def find_spec(self, name, target=None): + """Scan self.path for name's tail and build a spec, or None. + + CPython: Lib/importlib/_bootstrap_external.py:1403 FileFinder.find_spec + """ + import importlib.util as _util + return _util._spec_from_search(name, [self.path]) + + @classmethod + def path_hook(cls, *loader_details): + """Return a closure that builds a FileFinder for a directory. + + Raises ImportError for non-directory path items so get_importer + falls through to the next hook (or None), exactly like CPython. + + CPython: Lib/importlib/_bootstrap_external.py:1467 FileFinder.path_hook + """ + def path_hook_for_FileFinder(path): + import os + if not os.path.isdir(path): + raise ImportError('only directories are supported', path=path) + return cls(path, *loader_details) + return path_hook_for_FileFinder + class ModuleSpec: """The specification for a module, used for loading. @@ -113,6 +144,24 @@ def has_location(self, value): self._set_fileattr = bool(value) +# Install the file-finder path hook so pkgutil.get_importer and +# runpy.run_path recognise directories on sys.path. CPython does this in +# _bootstrap_external._install; gopy's bootstrap is Go-side, so the hook +# is registered when machinery is first imported. +# +# CPython: Lib/importlib/_bootstrap_external.py:1648 _install (path_hooks) +def _install_path_hooks(): + import sys + if getattr(sys, '_gopy_file_finder_installed', False): + return + _loader_details = (SourceFileLoader, SOURCE_SUFFIXES) + sys.path_hooks.append(FileFinder.path_hook(_loader_details)) + sys._gopy_file_finder_installed = True + + +_install_path_hooks() + + __all__ = [ 'BYTECODE_SUFFIXES', 'DEBUG_BYTECODE_SUFFIXES', diff --git a/stdlib/importlib/util.py b/stdlib/importlib/util.py index 1211ba7c..d4d249b5 100644 --- a/stdlib/importlib/util.py +++ b/stdlib/importlib/util.py @@ -78,6 +78,15 @@ def _spec_from_search(name, search): if search is None: return None tail = name.rpartition(".")[2] + # PEP 420: every directory that matches the tail but lacks a regular + # __init__.py / module file contributes a namespace portion. CPython's + # PathFinder accumulates these across all path entries and, if no + # concrete module is found, returns a namespace spec whose loader is + # None and whose search locations are the collected portions. + # + # CPython: Lib/importlib/_bootstrap_external.py:1496 _fill_cache / + # PathFinder._get_spec namespace_path accumulation + namespace_portions = [] for entry in search: directory = entry if entry else "." pkg_init = os.path.join(directory, tail, "__init__.py") @@ -90,6 +99,13 @@ def _spec_from_search(name, search): if os.path.isfile(mod_file): return spec_from_file_location( name, mod_file, loader=_SourceFileLoader(name, mod_file)) + pkg_dir = os.path.join(directory, tail) + if os.path.isdir(pkg_dir): + namespace_portions.append(pkg_dir) + if namespace_portions: + spec = ModuleSpec(name, None, is_package=True) + spec.submodule_search_locations = list(namespace_portions) + return spec return None diff --git a/vm/builtins_hook.go b/vm/builtins_hook.go index 07aeebc1..c6295ad5 100644 --- a/vm/builtins_hook.go +++ b/vm/builtins_hook.go @@ -630,6 +630,16 @@ func currentImporter(name, pkgname string, level int, _ []string) (objects.Objec exec := &vmExecutor{ts: ts, builtins: b} mod, err := imp.ImportModuleLevel(exec, name, pkgname, level) if err != nil { + // A missing module must surface as a ModuleNotFoundError whose + // `name` member is the dotted name being imported. runpy reads + // exc.name to decide whether to keep searching, so a generic Go + // error synthesized without the attribute breaks that contract. + // + // CPython: Python/import.c:1759 import_name (ModuleNotFoundError, name=) + if errors.Is(err, imp.ErrModuleNotFound) { + exc := pyerrors.MakeModuleNotFound(name) + return nil, objects.NewRaisedError(exc, err.Error()) + } return nil, err } return mod, nil diff --git a/vm/eval_helpers.go b/vm/eval_helpers.go index d5a3947b..f252d926 100644 --- a/vm/eval_helpers.go +++ b/vm/eval_helpers.go @@ -275,8 +275,7 @@ func (e *evalState) importName(name, fromlist, level objects.Object) objects.Obj mod, ierr := imp.ImportModuleLevel(exec, modname, pkgname, lvl) if ierr != nil { if errors.Is(ierr, imp.ErrModuleNotFound) { - pyerrors.SetString(e.ts, pyerrors.PyExc_ModuleNotFoundError, - fmt.Sprintf("No module named %q", modname)) + pyerrors.SetModuleNotFound(e.ts, modname) } e.pendingErr = ierr return nil diff --git a/vm/eval_import.go b/vm/eval_import.go index dfbc6c4e..bd5ea963 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -209,8 +209,7 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo // // CPython: Python/import.c:1759 import_name (sets ImportError) if errors.Is(ierr, imp.ErrModuleNotFound) { - pyerrors.SetString(e.ts, pyerrors.PyExc_ModuleNotFoundError, - fmt.Sprintf("No module named %q", modname)) + pyerrors.SetModuleNotFound(e.ts, modname) } return 0, true, ierr } From 5bfcd88ffab4d57176c665bc5c2c9ba73d3f69e9 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 23:40:02 +0700 Subject: [PATCH 10/84] imports: fix windows build, lint, and PathLike subprocess args Split exitSigint into unix/windows build-tagged files so the windows runner stops failing on syscall.Kill. Drop the nilerr lint hit in the ImportError member getter by treating a dict miss as None rather than an error. Accept os.PathLike argv members in _posixsubprocess.fork_exec the way fsconvert_strdup does, so subprocess calls passing pathlib.Path args no longer raise TypeError. --- cmd/gopy/main.go | 18 ------------------ cmd/gopy/sigint_unix.go | 24 ++++++++++++++++++++++++ cmd/gopy/sigint_windows.go | 13 +++++++++++++ errors/exc_import_init.go | 6 ++++-- module/_posixsubprocess/module.go | 16 +++++++++++++--- 5 files changed, 54 insertions(+), 23 deletions(-) create mode 100644 cmd/gopy/sigint_unix.go create mode 100644 cmd/gopy/sigint_windows.go diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 9e718780..cfc803d8 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -9,11 +9,9 @@ import ( "bytes" "fmt" "os" - "os/signal" "path/filepath" "runtime/pprof" "strings" - "syscall" "github.com/tamnd/gopy/build" "github.com/tamnd/gopy/builtins" @@ -73,22 +71,6 @@ func mainWithProfile() int { return exitcode } -// exitSigint resets SIGINT to its default disposition and delivers it -// to this process, so an unhandled KeyboardInterrupt terminates the -// interpreter by signal (exit status -SIGINT / 128+SIGINT). -// -// CPython: Modules/main.c:730 exit_sigint -func exitSigint() int { - signal.Reset(syscall.SIGINT) - if err := syscall.Kill(syscall.Getpid(), syscall.SIGINT); err != nil { - // Impossible in normal environments; fall back to the code - // CPython returns when the signal could not be delivered. - return int(syscall.SIGINT) + 128 - } - // Give the signal a moment to be delivered before falling through. - select {} -} - // run drives _PyOS_GetOpt the same way pymain_init walks argv before // the runtime config exists. argv is rewrapped with a leading program // name because getopt.GetOpt starts at OptInd=1 (matching CPython's diff --git a/cmd/gopy/sigint_unix.go b/cmd/gopy/sigint_unix.go new file mode 100644 index 00000000..b71976c6 --- /dev/null +++ b/cmd/gopy/sigint_unix.go @@ -0,0 +1,24 @@ +//go:build !windows + +package main + +import ( + "os/signal" + "syscall" +) + +// exitSigint resets SIGINT to its default disposition and delivers it +// to this process, so an unhandled KeyboardInterrupt terminates the +// interpreter by signal (exit status -SIGINT / 128+SIGINT). +// +// CPython: Modules/main.c:730 exit_sigint +func exitSigint() int { + signal.Reset(syscall.SIGINT) + if err := syscall.Kill(syscall.Getpid(), syscall.SIGINT); err != nil { + // Impossible in normal environments; fall back to the code + // CPython returns when the signal could not be delivered. + return int(syscall.SIGINT) + 128 + } + // Give the signal a moment to be delivered before falling through. + select {} +} diff --git a/cmd/gopy/sigint_windows.go b/cmd/gopy/sigint_windows.go new file mode 100644 index 00000000..a2f7209b --- /dev/null +++ b/cmd/gopy/sigint_windows.go @@ -0,0 +1,13 @@ +//go:build windows + +package main + +// exitSigint mirrors the Windows branch of CPython's exit_sigint: there is +// no POSIX kill(getpid, SIGINT), so the interpreter exits with SIGINT+128 +// (the value CPython returns when raise(SIGINT) does not abort the process). +// +// CPython: Modules/main.c:730 exit_sigint +func exitSigint() int { + // SIGINT is 2 on Windows; 2 + 128 = 130. + return 2 + 128 +} diff --git a/errors/exc_import_init.go b/errors/exc_import_init.go index e5de6bc5..80681d8a 100644 --- a/errors/exc_import_init.go +++ b/errors/exc_import_init.go @@ -50,8 +50,10 @@ func importErrorMember(o objects.Object, field string) (objects.Object, error) { if d == nil { return objects.None(), nil } - v, err := d.GetItem(objects.NewStr(field)) - if err != nil || v == nil { + // A missing member reads back as None (Py_T_OBJECT NULL->None), so a + // lookup miss is not an error here; discard it deliberately. + v, _ := d.GetItem(objects.NewStr(field)) + if v == nil { return objects.None(), nil } return v, nil diff --git a/module/_posixsubprocess/module.go b/module/_posixsubprocess/module.go index 99c71a0a..7efaaf38 100644 --- a/module/_posixsubprocess/module.go +++ b/module/_posixsubprocess/module.go @@ -219,16 +219,26 @@ func toStringSlice(obj objects.Object) ([]string, error) { return out, nil } -// objectToString converts a Python str or bytes object to a Go string. +// objectToString converts a Python str, bytes, or os.PathLike object to a +// Go string. CPython runs each argv member through fsconvert_strdup, which +// is PyUnicode_FSConverter, so pathlib.Path arguments are accepted too. +// +// CPython: Modules/_posixsubprocess.c:130 fsconvert_strdup func objectToString(obj objects.Object) (string, error) { switch v := obj.(type) { case *objects.Unicode: return v.Value(), nil case *objects.Bytes: return string(v.Bytes()), nil - default: - return "", fmt.Errorf("expected str, got %s", obj.Type().Name) } + if fspath, err := objects.GetAttr(obj, objects.NewStr("__fspath__")); err == nil { + result, err := objects.CallNoArgs(fspath) + if err != nil { + return "", err + } + return objectToString(result) + } + return "", fmt.Errorf("expected str, got %s", obj.Type().Name) } // fsConvert mirrors PyUnicode_FSConverter: it accepts a str, bytes, or From d4e8d5451ae2f3232efd1c84df61f180b068d727 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Sun, 14 Jun 2026 23:57:45 +0700 Subject: [PATCH 11/84] site: vendor site/_sitebuiltins and install interpreter builtins at startup gopy reported sys.flags.no_site as 0, claiming the site module had run, while exit/quit/help/copyright/credits/license were missing. Vendor site.py and _sitebuiltins.py unchanged from CPython 3.14 and import site during bootstrap (after encodings) the way init_import_site does, so site.main() runs setquit/setcopyright/sethelper and the builtins land. Also fall back to GenericGetAttr in _io.File getattr so dunders like __class__ resolve through the MRO; abc.__instancecheck__ probes sys.stdout and was raising AttributeError on the missing __class__. --- cmd/gopy/main.go | 30 ++ objects/file.go | 9 +- stdlib/_sitebuiltins.py | 91 +++++ stdlib/site.py | 779 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 908 insertions(+), 1 deletion(-) create mode 100644 stdlib/_sitebuiltins.py create mode 100644 stdlib/site.py diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index cfc803d8..e53171b1 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -253,6 +253,24 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File return 0 } +// bootstrapSite imports the site module, which runs site.main() at import +// time (the no_site flag is clear) to install the interpreter builtins +// exit / quit / help / copyright / credits / license via setquit / +// setcopyright / sethelper. CPython drives this from init_import_site +// during Py_Initialize after the import system is online; without it +// sys.flags.no_site reads 0 (claiming site loaded) while the builtins it +// installs are missing, so code.InteractiveConsole(local_exit=True) and +// other site-dependent paths diverge. +// +// CPython: Python/pylifecycle.c:1255 init_import_site (PyImport_ImportModule "site") +func bootstrapSite(ts *state.Thread, globals *objects.Dict, stderr *os.File) int { + if _, err := pythonrun.RunString(ts, "import site", "", parser.ModeFile, globals, nil); err != nil { + fmt.Fprintln(stderr, "preload site:", err) + return 1 + } + return 0 +} + // findStdlibRoot locates the vendored gopy stdlib tree. CPython's // equivalent is Modules/getpath.py's prefix discovery; the gopy port // (pathconfig/) targets the CPython install layout, not the gopy @@ -383,6 +401,9 @@ func runSource(src string, stdout, stderr *os.File) int { if rc := bootstrapEncodings(ts, mainGlobals, stderr); rc != 0 { return rc } + if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { + return rc + } rc := pythonrun.RunSimpleString(ts, src, mainGlobals, stderr) gc.RunShutdownFinalizers() pythonrun.FlushStdFiles() @@ -409,6 +430,9 @@ func runModule(modName string, modArgs []string, stdout, stderr *os.File) int { if rc := bootstrapEncodings(ts, mainGlobals, stderr); rc != 0 { return rc } + if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { + return rc + } // Equivalent of CPython's pymain_run_module which calls // runpy._run_module_as_main(modName) on the Python side. src := fmt.Sprintf("import runpy\nrunpy._run_module_as_main(%q)\n", modName) @@ -443,6 +467,9 @@ func runFile(path string, stdout, stderr *os.File) int { if rc := bootstrapEncodings(ts, mainGlobals, stderr); rc != 0 { return rc } + if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { + return rc + } // A vendored test runs under "test."; regrtest imports it as a // normal module, so its __spec__ is a real ModuleSpec. Build the same // file-location spec here so code that resolves the module by name and @@ -555,6 +582,9 @@ func runInteractive(stdout, stderr *os.File) int { if rc := bootstrapEncodings(ts, mainGlobals, stderr); rc != 0 { return rc } + if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { + return rc + } rc := pythonrun.InteractiveLoop(ts, os.Stdin, stdout, stderr, mainGlobals) pythonrun.FlushStdFiles() if rc != 0 { diff --git a/objects/file.go b/objects/file.go index 0ddf1c93..add0fbbe 100644 --- a/objects/file.go +++ b/objects/file.go @@ -397,7 +397,14 @@ func fileGetattr(o Object, name Object) (Object, error) { if fn := fileMethod(fi, n.v); fn != nil { return fn, nil } - return nil, fmt.Errorf("AttributeError: '%s' object has no attribute '%s'", FileType.Name, n.v) + // Anything the custom table does not handle (dunders such as + // __class__, __hash__, __eq__, the rich-compare set) resolves through + // the type the way PyObject_GenericGetAttr walks the MRO. Without this + // fallback, isinstance()/abc.__instancecheck__ probes against a file + // object raise spuriously because __class__ is missing. + // + // CPython: Objects/object.c:1430 _PyObject_GenericGetAttrWithDict + return GenericGetAttr(o, name) } // fileSetattr supports a single mutable attribute today: the mode diff --git a/stdlib/_sitebuiltins.py b/stdlib/_sitebuiltins.py new file mode 100644 index 00000000..81b36efc --- /dev/null +++ b/stdlib/_sitebuiltins.py @@ -0,0 +1,91 @@ +""" +The objects used by the site module to add custom builtins. +""" + +# Those objects are almost immortal and they keep a reference to their module +# globals. Defining them in the site module would keep too many references +# alive. +# Note this means this module should also avoid keep things alive in its +# globals. + +import sys + +class Quitter(object): + def __init__(self, name, eof): + self.name = name + self.eof = eof + def __repr__(self): + return 'Use %s() or %s to exit' % (self.name, self.eof) + def __call__(self, code=None): + # Shells like IDLE catch the SystemExit, but listen when their + # stdin wrapper is closed. + try: + sys.stdin.close() + except: + pass + raise SystemExit(code) + + +class _Printer(object): + """interactive prompt objects for printing the license text, a list of + contributors and the copyright notice.""" + + MAXLINES = 23 + + def __init__(self, name, data, files=(), dirs=()): + import os + self.__name = name + self.__data = data + self.__lines = [] + self.__filenames = [os.path.join(dir, filename) + for dir in dirs + for filename in files] + + def __setup(self): + if self.__lines: + return + data = None + for filename in self.__filenames: + try: + with open(filename, encoding='utf-8') as fp: + data = fp.read() + break + except OSError: + pass + if not data: + data = self.__data + self.__lines = data.split('\n') + self.__linecnt = len(self.__lines) + + def __repr__(self): + self.__setup() + if len(self.__lines) <= self.MAXLINES: + return "\n".join(self.__lines) + else: + return "Type %s() to see the full %s text" % ((self.__name,)*2) + + def __call__(self): + from _pyrepl.pager import get_pager + self.__setup() + + pager = get_pager() + text = "\n".join(self.__lines) + pager(text, title=self.__name) + + +class _Helper(object): + """Define the builtin 'help'. + + This is a wrapper around pydoc.help that provides a helpful message + when 'help' is typed at the Python interactive prompt. + + Calling help() at the Python prompt starts an interactive help session. + Calling help(thing) prints help for the python object 'thing'. + """ + + def __repr__(self): + return "Type help() for interactive help, " \ + "or help(object) for help about object." + def __call__(self, *args, **kwds): + import pydoc + return pydoc.help(*args, **kwds) diff --git a/stdlib/site.py b/stdlib/site.py new file mode 100644 index 00000000..aeb7c6cf --- /dev/null +++ b/stdlib/site.py @@ -0,0 +1,779 @@ +"""Append module search paths for third-party packages to sys.path. + +**************************************************************** +* This module is automatically imported during initialization. * +**************************************************************** + +This will append site-specific paths to the module search path. On +Unix (including Mac OSX), it starts with sys.prefix and +sys.exec_prefix (if different) and appends +lib/python/site-packages. +On other platforms (such as Windows), it tries each of the +prefixes directly, as well as with lib/site-packages appended. The +resulting directories, if they exist, are appended to sys.path, and +also inspected for path configuration files. + +If a file named "pyvenv.cfg" exists one directory above sys.executable, +sys.prefix and sys.exec_prefix are set to that directory and +it is also checked for site-packages (sys.base_prefix and +sys.base_exec_prefix will always be the "real" prefixes of the Python +installation). If "pyvenv.cfg" (a bootstrap configuration file) contains +the key "include-system-site-packages" set to anything other than "false" +(case-insensitive), the system-level prefixes will still also be +searched for site-packages; otherwise they won't. + +All of the resulting site-specific directories, if they exist, are +appended to sys.path, and also inspected for path configuration +files. + +A path configuration file is a file whose name has the form +.pth; its contents are additional directories (one per line) +to be added to sys.path. Non-existing directories (or +non-directories) are never added to sys.path; no directory is added to +sys.path more than once. Blank lines and lines beginning with +'#' are skipped. Lines starting with 'import' are executed. + +For example, suppose sys.prefix and sys.exec_prefix are set to +/usr/local and there is a directory /usr/local/lib/python2.5/site-packages +with three subdirectories, foo, bar and spam, and two path +configuration files, foo.pth and bar.pth. Assume foo.pth contains the +following: + + # foo package configuration + foo + bar + bletch + +and bar.pth contains: + + # bar package configuration + bar + +Then the following directories are added to sys.path, in this order: + + /usr/local/lib/python2.5/site-packages/bar + /usr/local/lib/python2.5/site-packages/foo + +Note that bletch is omitted because it doesn't exist; bar precedes foo +because bar.pth comes alphabetically before foo.pth; and spam is +omitted because it is not mentioned in either path configuration file. + +The readline module is also automatically configured to enable +completion for systems that support it. This can be overridden in +sitecustomize, usercustomize or PYTHONSTARTUP. Starting Python in +isolated mode (-I) disables automatic readline configuration. + +After these operations, an attempt is made to import a module +named sitecustomize, which can perform arbitrary additional +site-specific customizations. If this import fails with an +ImportError exception, it is silently ignored. +""" + +import sys +import os +import builtins +import _sitebuiltins +import _io as io +import stat +import errno + +# Prefixes for site-packages; add additional prefixes like /usr/local here +PREFIXES = [sys.prefix, sys.exec_prefix] +# Enable per user site-packages directory +# set it to False to disable the feature or True to force the feature +ENABLE_USER_SITE = None + +# for distutils.commands.install +# These values are initialized by the getuserbase() and getusersitepackages() +# functions, through the main() function when Python starts. +USER_SITE = None +USER_BASE = None + + +def _trace(message): + if sys.flags.verbose: + print(message, file=sys.stderr) + + +def _warn(*args, **kwargs): + import warnings + + warnings.warn(*args, **kwargs) + + +def makepath(*paths): + dir = os.path.join(*paths) + try: + dir = os.path.abspath(dir) + except OSError: + pass + return dir, os.path.normcase(dir) + + +def abs_paths(): + """Set all module __file__ and __cached__ attributes to an absolute path""" + for m in set(sys.modules.values()): + loader_module = None + try: + loader_module = m.__loader__.__module__ + except AttributeError: + try: + loader_module = m.__spec__.loader.__module__ + except AttributeError: + pass + if loader_module not in {'_frozen_importlib', '_frozen_importlib_external'}: + continue # don't mess with a PEP 302-supplied __file__ + try: + m.__file__ = os.path.abspath(m.__file__) + except (AttributeError, OSError, TypeError): + pass + try: + m.__cached__ = os.path.abspath(m.__cached__) + except (AttributeError, OSError, TypeError): + pass + + +def removeduppaths(): + """ Remove duplicate entries from sys.path along with making them + absolute""" + # This ensures that the initial path provided by the interpreter contains + # only absolute pathnames, even if we're running from the build directory. + L = [] + known_paths = set() + for dir in sys.path: + # Filter out duplicate paths (on case-insensitive file systems also + # if they only differ in case); turn relative paths into absolute + # paths. + dir, dircase = makepath(dir) + if dircase not in known_paths: + L.append(dir) + known_paths.add(dircase) + sys.path[:] = L + return known_paths + + +def _init_pathinfo(): + """Return a set containing all existing file system items from sys.path.""" + d = set() + for item in sys.path: + try: + if os.path.exists(item): + _, itemcase = makepath(item) + d.add(itemcase) + except TypeError: + continue + return d + + +def addpackage(sitedir, name, known_paths): + """Process a .pth file within the site-packages directory: + For each line in the file, either combine it with sitedir to a path + and add that to known_paths, or execute it if it starts with 'import '. + """ + if known_paths is None: + known_paths = _init_pathinfo() + reset = True + else: + reset = False + fullname = os.path.join(sitedir, name) + try: + st = os.lstat(fullname) + except OSError: + return + if ((getattr(st, 'st_flags', 0) & stat.UF_HIDDEN) or + (getattr(st, 'st_file_attributes', 0) & stat.FILE_ATTRIBUTE_HIDDEN)): + _trace(f"Skipping hidden .pth file: {fullname!r}") + return + _trace(f"Processing .pth file: {fullname!r}") + try: + with io.open_code(fullname) as f: + pth_content = f.read() + except OSError: + return + + try: + # Accept BOM markers in .pth files as we do in source files + # (Windows PowerShell 5.1 makes it hard to emit UTF-8 files without a BOM) + pth_content = pth_content.decode("utf-8-sig") + except UnicodeDecodeError: + # Fallback to locale encoding for backward compatibility. + # We will deprecate this fallback in the future. + import locale + pth_content = pth_content.decode(locale.getencoding()) + _trace(f"Cannot read {fullname!r} as UTF-8. " + f"Using fallback encoding {locale.getencoding()!r}") + + for n, line in enumerate(pth_content.splitlines(), 1): + if line.startswith("#"): + continue + if line.strip() == "": + continue + try: + if line.startswith(("import ", "import\t")): + exec(line) + continue + line = line.rstrip() + dir, dircase = makepath(sitedir, line) + if dircase not in known_paths and os.path.exists(dir): + sys.path.append(dir) + known_paths.add(dircase) + except Exception as exc: + print(f"Error processing line {n:d} of {fullname}:\n", + file=sys.stderr) + import traceback + for record in traceback.format_exception(exc): + for line in record.splitlines(): + print(' '+line, file=sys.stderr) + print("\nRemainder of file ignored", file=sys.stderr) + break + if reset: + known_paths = None + return known_paths + + +def addsitedir(sitedir, known_paths=None): + """Add 'sitedir' argument to sys.path if missing and handle .pth files in + 'sitedir'""" + _trace(f"Adding directory: {sitedir!r}") + if known_paths is None: + known_paths = _init_pathinfo() + reset = True + else: + reset = False + sitedir, sitedircase = makepath(sitedir) + if not sitedircase in known_paths: + sys.path.append(sitedir) # Add path component + known_paths.add(sitedircase) + try: + names = os.listdir(sitedir) + except OSError: + return + names = [name for name in names + if name.endswith(".pth") and not name.startswith(".")] + for name in sorted(names): + addpackage(sitedir, name, known_paths) + if reset: + known_paths = None + return known_paths + + +def check_enableusersite(): + """Check if user site directory is safe for inclusion + + The function tests for the command line flag (including environment var), + process uid/gid equal to effective uid/gid. + + None: Disabled for security reasons + False: Disabled by user (command line option) + True: Safe and enabled + """ + if sys.flags.no_user_site: + return False + + if hasattr(os, "getuid") and hasattr(os, "geteuid"): + # check process uid == effective uid + if os.geteuid() != os.getuid(): + return None + if hasattr(os, "getgid") and hasattr(os, "getegid"): + # check process gid == effective gid + if os.getegid() != os.getgid(): + return None + + return True + + +# NOTE: sysconfig and it's dependencies are relatively large but site module +# needs very limited part of them. +# To speedup startup time, we have copy of them. +# +# See https://bugs.python.org/issue29585 + +# Copy of sysconfig._get_implementation() +def _get_implementation(): + return 'Python' + +# Copy of sysconfig._getuserbase() +def _getuserbase(): + env_base = os.environ.get("PYTHONUSERBASE", None) + if env_base: + return env_base + + # Emscripten, iOS, tvOS, VxWorks, WASI, and watchOS have no home directories + if sys.platform in {"emscripten", "ios", "tvos", "vxworks", "wasi", "watchos"}: + return None + + def joinuser(*args): + return os.path.expanduser(os.path.join(*args)) + + if os.name == "nt": + base = os.environ.get("APPDATA") or "~" + return joinuser(base, _get_implementation()) + + if sys.platform == "darwin" and sys._framework: + return joinuser("~", "Library", sys._framework, + "%d.%d" % sys.version_info[:2]) + + return joinuser("~", ".local") + + +# Same to sysconfig.get_path('purelib', os.name+'_user') +def _get_path(userbase): + version = sys.version_info + if hasattr(sys, 'abiflags') and 't' in sys.abiflags: + abi_thread = 't' + else: + abi_thread = '' + + implementation = _get_implementation() + implementation_lower = implementation.lower() + if os.name == 'nt': + ver_nodot = sys.winver.replace('.', '') + return f'{userbase}\\{implementation}{ver_nodot}\\site-packages' + + if sys.platform == 'darwin' and sys._framework: + return f'{userbase}/lib/{implementation_lower}/site-packages' + + return f'{userbase}/lib/python{version[0]}.{version[1]}{abi_thread}/site-packages' + + +def getuserbase(): + """Returns the `user base` directory path. + + The `user base` directory can be used to store data. If the global + variable ``USER_BASE`` is not initialized yet, this function will also set + it. + """ + global USER_BASE + if USER_BASE is None: + USER_BASE = _getuserbase() + return USER_BASE + + +def getusersitepackages(): + """Returns the user-specific site-packages directory path. + + If the global variable ``USER_SITE`` is not initialized yet, this + function will also set it. + """ + global USER_SITE, ENABLE_USER_SITE + userbase = getuserbase() # this will also set USER_BASE + + if USER_SITE is None: + if userbase is None: + ENABLE_USER_SITE = False # disable user site and return None + else: + USER_SITE = _get_path(userbase) + + return USER_SITE + +def addusersitepackages(known_paths): + """Add a per user site-package to sys.path + + Each user has its own python directory with site-packages in the + home directory. + """ + # get the per user site-package path + # this call will also make sure USER_BASE and USER_SITE are set + _trace("Processing user site-packages") + user_site = getusersitepackages() + + if ENABLE_USER_SITE and os.path.isdir(user_site): + addsitedir(user_site, known_paths) + return known_paths + +def getsitepackages(prefixes=None): + """Returns a list containing all global site-packages directories. + + For each directory present in ``prefixes`` (or the global ``PREFIXES``), + this function will find its `site-packages` subdirectory depending on the + system environment, and will return a list of full paths. + """ + sitepackages = [] + seen = set() + + if prefixes is None: + prefixes = PREFIXES + + for prefix in prefixes: + if not prefix or prefix in seen: + continue + seen.add(prefix) + + implementation = _get_implementation().lower() + ver = sys.version_info + if hasattr(sys, 'abiflags') and 't' in sys.abiflags: + abi_thread = 't' + else: + abi_thread = '' + if os.sep == '/': + libdirs = [sys.platlibdir] + if sys.platlibdir != "lib": + libdirs.append("lib") + + for libdir in libdirs: + path = os.path.join(prefix, libdir, + f"{implementation}{ver[0]}.{ver[1]}{abi_thread}", + "site-packages") + sitepackages.append(path) + else: + sitepackages.append(prefix) + sitepackages.append(os.path.join(prefix, "Lib", "site-packages")) + return sitepackages + +def addsitepackages(known_paths, prefixes=None): + """Add site-packages to sys.path""" + _trace("Processing global site-packages") + for sitedir in getsitepackages(prefixes): + if os.path.isdir(sitedir): + addsitedir(sitedir, known_paths) + + return known_paths + +def setquit(): + """Define new builtins 'quit' and 'exit'. + + These are objects which make the interpreter exit when called. + The repr of each object contains a hint at how it works. + + """ + if os.sep == '\\': + eof = 'Ctrl-Z plus Return' + else: + eof = 'Ctrl-D (i.e. EOF)' + + builtins.quit = _sitebuiltins.Quitter('quit', eof) + builtins.exit = _sitebuiltins.Quitter('exit', eof) + + +def setcopyright(): + """Set 'copyright' and 'credits' in builtins""" + builtins.copyright = _sitebuiltins._Printer("copyright", sys.copyright) + builtins.credits = _sitebuiltins._Printer("credits", """\ +Thanks to CWI, CNRI, BeOpen, Zope Corporation, the Python Software +Foundation, and a cast of thousands for supporting Python +development. See www.python.org for more information.""") + files, dirs = [], [] + # Not all modules are required to have a __file__ attribute. See + # PEP 420 for more details. + here = getattr(sys, '_stdlib_dir', None) + if not here and hasattr(os, '__file__'): + here = os.path.dirname(os.__file__) + if here: + files.extend(["LICENSE.txt", "LICENSE"]) + dirs.extend([os.path.join(here, os.pardir), here, os.curdir]) + builtins.license = _sitebuiltins._Printer( + "license", + "See https://www.python.org/psf/license/", + files, dirs) + + +def sethelper(): + builtins.help = _sitebuiltins._Helper() + + +def gethistoryfile(): + """Check if the PYTHON_HISTORY environment variable is set and define + it as the .python_history file. If PYTHON_HISTORY is not set, use the + default .python_history file. + """ + if not sys.flags.ignore_environment: + history = os.environ.get("PYTHON_HISTORY") + if history: + return history + return os.path.join(os.path.expanduser('~'), + '.python_history') + + +def enablerlcompleter(): + """Enable default readline configuration on interactive prompts, by + registering a sys.__interactivehook__. + """ + sys.__interactivehook__ = register_readline + + +def register_readline(): + """Configure readline completion on interactive prompts. + + If the readline module can be imported, the hook will set the Tab key + as completion key and register ~/.python_history as history file. + This can be overridden in the sitecustomize or usercustomize module, + or in a PYTHONSTARTUP file. + """ + if not sys.flags.ignore_environment: + PYTHON_BASIC_REPL = os.getenv("PYTHON_BASIC_REPL") + else: + PYTHON_BASIC_REPL = False + + import atexit + + try: + try: + import readline + except ImportError: + readline = None + else: + import rlcompleter # noqa: F401 + except ImportError: + return + + try: + if PYTHON_BASIC_REPL: + CAN_USE_PYREPL = False + else: + original_path = sys.path + sys.path = [p for p in original_path if p != ''] + try: + import _pyrepl.readline + if os.name == "nt": + import _pyrepl.windows_console + console_errors = (_pyrepl.windows_console._error,) + else: + import _pyrepl.unix_console + console_errors = _pyrepl.unix_console._error + from _pyrepl.main import CAN_USE_PYREPL + finally: + sys.path = original_path + except ImportError: + return + + if readline is not None: + # Reading the initialization (config) file may not be enough to set a + # completion key, so we set one first and then read the file. + if readline.backend == 'editline': + readline.parse_and_bind('bind ^I rl_complete') + else: + readline.parse_and_bind('tab: complete') + + try: + readline.read_init_file() + except OSError: + # An OSError here could have many causes, but the most likely one + # is that there's no .inputrc file (or .editrc file in the case of + # Mac OS X + libedit) in the expected location. In that case, we + # want to ignore the exception. + pass + + if readline is None or readline.get_current_history_length() == 0: + # If no history was loaded, default to .python_history, + # or PYTHON_HISTORY. + # The guard is necessary to avoid doubling history size at + # each interpreter exit when readline was already configured + # through a PYTHONSTARTUP hook, see: + # http://bugs.python.org/issue5845#msg198636 + history = gethistoryfile() + + if CAN_USE_PYREPL: + readline_module = _pyrepl.readline + exceptions = (OSError, *console_errors) + else: + if readline is None: + return + readline_module = readline + exceptions = OSError + + try: + readline_module.read_history_file(history) + except exceptions: + pass + + def write_history(): + try: + readline_module.write_history_file(history) + except FileNotFoundError, PermissionError: + # home directory does not exist or is not writable + # https://bugs.python.org/issue19891 + pass + except OSError: + if errno.EROFS: + pass # gh-128066: read-only file system + else: + raise + + atexit.register(write_history) + + +def venv(known_paths): + global PREFIXES, ENABLE_USER_SITE + + env = os.environ + if sys.platform == 'darwin' and '__PYVENV_LAUNCHER__' in env: + executable = sys._base_executable = os.environ['__PYVENV_LAUNCHER__'] + else: + executable = sys.executable + exe_dir = os.path.dirname(os.path.abspath(executable)) + site_prefix = os.path.dirname(exe_dir) + sys._home = None + conf_basename = 'pyvenv.cfg' + candidate_conf = next( + ( + conffile for conffile in ( + os.path.join(exe_dir, conf_basename), + os.path.join(site_prefix, conf_basename) + ) + if os.path.isfile(conffile) + ), + None + ) + + if candidate_conf: + virtual_conf = candidate_conf + system_site = "true" + # Issue 25185: Use UTF-8, as that's what the venv module uses when + # writing the file. + with open(virtual_conf, encoding='utf-8') as f: + for line in f: + if '=' in line: + key, _, value = line.partition('=') + key = key.strip().lower() + value = value.strip() + if key == 'include-system-site-packages': + system_site = value.lower() + elif key == 'home': + sys._home = value + + if sys.prefix != site_prefix: + _warn(f'Unexpected value in sys.prefix, expected {site_prefix}, got {sys.prefix}', RuntimeWarning) + if sys.exec_prefix != site_prefix: + _warn(f'Unexpected value in sys.exec_prefix, expected {site_prefix}, got {sys.exec_prefix}', RuntimeWarning) + + # Doing this here ensures venv takes precedence over user-site + addsitepackages(known_paths, [sys.prefix]) + + if system_site == "true": + PREFIXES += [sys.base_prefix, sys.base_exec_prefix] + else: + ENABLE_USER_SITE = False + + return known_paths + + +def execsitecustomize(): + """Run custom site specific code, if available.""" + try: + try: + import sitecustomize # noqa: F401 + except ImportError as exc: + if exc.name == 'sitecustomize': + pass + else: + raise + except Exception as err: + if sys.flags.verbose: + sys.excepthook(*sys.exc_info()) + else: + sys.stderr.write( + "Error in sitecustomize; set PYTHONVERBOSE for traceback:\n" + "%s: %s\n" % + (err.__class__.__name__, err)) + + +def execusercustomize(): + """Run custom user specific code, if available.""" + try: + try: + import usercustomize # noqa: F401 + except ImportError as exc: + if exc.name == 'usercustomize': + pass + else: + raise + except Exception as err: + if sys.flags.verbose: + sys.excepthook(*sys.exc_info()) + else: + sys.stderr.write( + "Error in usercustomize; set PYTHONVERBOSE for traceback:\n" + "%s: %s\n" % + (err.__class__.__name__, err)) + + +def main(): + """Add standard site-specific directories to the module search path. + + This function is called automatically when this module is imported, + unless the python interpreter was started with the -S flag. + """ + global ENABLE_USER_SITE + + orig_path = sys.path[:] + known_paths = removeduppaths() + if orig_path != sys.path: + # removeduppaths() might make sys.path absolute. + # fix __file__ and __cached__ of already imported modules too. + abs_paths() + + known_paths = venv(known_paths) + if ENABLE_USER_SITE is None: + ENABLE_USER_SITE = check_enableusersite() + known_paths = addusersitepackages(known_paths) + known_paths = addsitepackages(known_paths) + setquit() + setcopyright() + sethelper() + if not sys.flags.isolated: + enablerlcompleter() + execsitecustomize() + if ENABLE_USER_SITE: + execusercustomize() + +# Prevent extending of sys.path when python was started with -S and +# site is imported later. +if not sys.flags.no_site: + main() + +def _script(): + help = """\ + %s [--user-base] [--user-site] + + Without arguments print some useful information + With arguments print the value of USER_BASE and/or USER_SITE separated + by '%s'. + + Exit codes with --user-base or --user-site: + 0 - user site directory is enabled + 1 - user site directory is disabled by user + 2 - user site directory is disabled by super user + or for security reasons + >2 - unknown error + """ + args = sys.argv[1:] + if not args: + user_base = getuserbase() + user_site = getusersitepackages() + print("sys.path = [") + for dir in sys.path: + print(" %r," % (dir,)) + print("]") + def exists(path): + if path is not None and os.path.isdir(path): + return "exists" + else: + return "doesn't exist" + print(f"USER_BASE: {user_base!r} ({exists(user_base)})") + print(f"USER_SITE: {user_site!r} ({exists(user_site)})") + print(f"ENABLE_USER_SITE: {ENABLE_USER_SITE!r}") + sys.exit(0) + + buffer = [] + if '--user-base' in args: + buffer.append(USER_BASE) + if '--user-site' in args: + buffer.append(USER_SITE) + + if buffer: + print(os.pathsep.join(buffer)) + if ENABLE_USER_SITE: + sys.exit(0) + elif ENABLE_USER_SITE is False: + sys.exit(1) + elif ENABLE_USER_SITE is None: + sys.exit(2) + else: + sys.exit(3) + else: + import textwrap + print(textwrap.dedent(help % (sys.argv[0], os.pathsep))) + sys.exit(10) + +if __name__ == '__main__': + _script() From 1770db04f4f758e8cd10dc8844d60e9891aa3e7f Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 00:18:29 +0700 Subject: [PATCH 12/84] dict: invalidate keys version on resize so LOAD_ATTR cache cannot read a stale slot A value-replacement on an at-capacity dict triggers dictResize before the replace-vs-insert branch in dictInsert. The resize rebuilds the table and renumbers every slot, but the replace path returns without touching the keys version, so LOAD_ATTR_INSTANCE_VALUE kept reading the cached (now wrong) slot index. CPython hands a resized dict a fresh keys object whose dk_version is 0, which drops every stamped inline cache; mirror that by resetting the version inside dictResize. Also route sys.excepthook through the live sys.stderr and format the full traceback via errors.FormatException, the way _PyErr_Display does, so a test that mocks sys.stderr captures the output. --- module/sys/excepthook.go | 59 ++++++++++++++++++++++++++++++---------- objects/dict_mutate.go | 12 ++++++++ 2 files changed, 56 insertions(+), 15 deletions(-) diff --git a/module/sys/excepthook.go b/module/sys/excepthook.go index ea8d8df2..88fa5873 100644 --- a/module/sys/excepthook.go +++ b/module/sys/excepthook.go @@ -1,19 +1,19 @@ // sys.excepthook is invoked by the interpreter when an exception goes -// uncaught at the top level, and by threading.py to display exceptions -// raised in worker threads. CPython routes through PyErr_Display which -// formats a traceback. The gopy port writes a minimal "type: value" -// line to sys.stderr; full traceback formatting can plug in once the -// stack-walk hook is exposed. +// uncaught at the top level, by threading.py to display exceptions +// raised in worker threads, and by code.InteractiveConsole to render a +// traceback. CPython routes through PyErr_Display, which formats the +// full traceback (chained causes included) and writes it through the +// live sys.stderr object so a redirected or mocked stream captures it. // // CPython: Python/sysmodule.c sys_excepthook_impl // CPython: Python/pythonrun.c PyErr_Display - package sys import ( "fmt" "os" + "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/objects" ) @@ -21,15 +21,44 @@ func excepthookShim(args []objects.Object, _ map[string]objects.Object) (objects if len(args) < 3 { return objects.None(), nil } - exc := args[1] - repr, err := objects.Str(exc) - if err != nil { - // Best-effort hook: a failing repr is swallowed because the - // excepthook itself runs while an exception is already being - // reported and must not re-raise. - return objects.None(), nil //nolint:nilerr // intentional swallow + // PyErr_Display formats the value argument (args[1]); the type and + // traceback are derived from it. code.InteractiveConsole already + // stitched the traceback onto the value via with_traceback before + // calling the hook, so FormatException(value) renders the same frames. + text := excepthookText(args[1]) + + // Write through the live sys.stderr the way _PyErr_Display does, so a + // caller that swapped sys.stderr (tests mocking the stream, the REPL's + // captured stderr) sees the output instead of the process fd. + // + // CPython: Python/pythonrun.c _PyErr_Display (PySys_GetObject "stderr") + d := liveSysDict() + if d != nil { + if errf, _ := d.GetItem(objects.NewStr("stderr")); errf != nil && errf != objects.None() { + if write, err := objects.GetAttr(errf, objects.NewStr("write")); err == nil { + if _, err := objects.Call(write, objects.NewTuple([]objects.Object{objects.NewStr(text)}), nil); err == nil { + return objects.None(), nil + } + } + } } - tp := exc.Type().Name - fmt.Fprintf(os.Stderr, "%s: %s\n", tp, repr) + // Fall back to the process stderr only when sys.stderr is missing or + // unusable, mirroring CPython's last-resort write to the C-level + // stderr in _PyErr_Display. + fmt.Fprint(os.Stderr, text) return objects.None(), nil } + +// excepthookText renders the traceback string for the exception value, +// falling back to a "Type: repr" line when the object is not a gopy +// Exception (the hook must never raise while reporting an error). +func excepthookText(value objects.Object) string { + if exc, ok := value.(*errors.Exception); ok { + return errors.FormatException(exc) + } + repr, err := objects.Str(value) + if err != nil { + return value.Type().Name + "\n" + } + return value.Type().Name + ": " + repr + "\n" +} diff --git a/objects/dict_mutate.go b/objects/dict_mutate.go index 31d8d9cb..2ae7bf5c 100644 --- a/objects/dict_mutate.go +++ b/objects/dict_mutate.go @@ -303,6 +303,18 @@ func dictResize(d *Dict, minNew int) error { return err } } + // A resize rebuilds the table, so a key's slot index changes even + // though no key was added or removed. CPython hands the resized dict + // a freshly allocated PyDictKeysObject whose dk_version starts at 0, + // which invalidates every inline cache stamped against the old keys. + // gopy reuses the same *Dict, so reset the version here; otherwise a + // value-replacement that triggers a resize (the load check runs + // before the replace-vs-insert branch in dictInsert) would leave the + // stale dk_version in place and LOAD_ATTR_INSTANCE_VALUE would read + // the wrong slot. + // + // CPython: Objects/dictobject.c:2065 dictresize (new_keys->dk_version = 0) + d.invalidateKeysVersion() return nil } From e8401552a834beac6f7d41ca74d65a187ee1ea59 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 00:36:05 +0700 Subject: [PATCH 13/84] module: delegate repr to importlib._module_repr and collect dict cycles ModuleType.__repr__ now forwards to importlib._bootstrap._module_repr the same way CPython's module_repr goes through _PyImport_ImportlibModuleRepr, so the __spec__/__loader__/__file__ variants (namespace packages, the '?' name fallback, bare/full loader reprs) all render identically. Wired the _bootstrap_external module global that _install_external_importers would normally set, vendored NamespaceLoader/_NamespacePath, and re-exported NamespaceLoader from importlib.machinery. Modules are now GC-tracked with a tp_traverse over md_dict. A module whose __dict__ holds functions closing over that same dict is a reference cycle; without the traverse edge the collector treated md_dict as rooted and never ran __del__ on cyclic objects defined in the module body. test_module: 39 tests, all green. --- objects/copyreg_hook.go | 9 + objects/module.go | 82 +++-- stdlib/importlib/_bootstrap_external.py | 113 +++++++ stdlib/importlib/machinery.py | 1 + stdlib/test/test_module/__init__.py | 402 ++++++++++++++++++++++++ stdlib/test/test_module/bad_getattr.py | 4 + stdlib/test/test_module/bad_getattr2.py | 7 + stdlib/test/test_module/bad_getattr3.py | 5 + stdlib/test/test_module/final_a.py | 19 ++ stdlib/test/test_module/final_b.py | 19 ++ stdlib/test/test_module/good_getattr.py | 11 + vm/copyreg_hook.go | 46 +++ 12 files changed, 699 insertions(+), 19 deletions(-) create mode 100644 stdlib/test/test_module/__init__.py create mode 100644 stdlib/test/test_module/bad_getattr.py create mode 100644 stdlib/test/test_module/bad_getattr2.py create mode 100644 stdlib/test/test_module/bad_getattr3.py create mode 100644 stdlib/test/test_module/final_a.py create mode 100644 stdlib/test/test_module/final_b.py create mode 100644 stdlib/test/test_module/good_getattr.py diff --git a/objects/copyreg_hook.go b/objects/copyreg_hook.go index 3cd45eb0..8f138b0a 100644 --- a/objects/copyreg_hook.go +++ b/objects/copyreg_hook.go @@ -38,3 +38,12 @@ var CurrentBuiltinsHook func() Object // // CPython: Python/import.c:1450 PyImport_ImportModule var ImportModuleHook func(name string) (Object, error) + +// ModuleReprHook formats a module's repr by delegating to the vendored +// importlib._bootstrap._module_repr, exactly as CPython's C +// module_repr forwards to _PyImport_ImportlibModuleRepr. Wired by +// vm.init(); nil during early bootstrap, where moduleRepr falls back to +// a minimal Go rendering. +// +// CPython: Python/import.c:3346 _PyImport_ImportlibModuleRepr +var ModuleReprHook func(m Object) (string, error) diff --git a/objects/module.go b/objects/module.go index b2323ae7..896919ff 100644 --- a/objects/module.go +++ b/objects/module.go @@ -50,6 +50,15 @@ func init() { ModuleType.HasWeakref = true ModuleType.Repr = moduleRepr ModuleType.Str = moduleRepr + // A module owns its md_dict, so the cycle collector must follow that + // edge: a module whose __dict__ holds functions whose __globals__ is + // that same dict forms a reference cycle (the common case for any + // executed module). Without tp_traverse the collector treats md_dict + // as externally rooted and never reclaims the cycle, so __del__ of a + // cyclic object defined in the module body would never run. + // + // CPython: Objects/moduleobject.c:739 module_traverse + ModuleType.TpTraverse = moduleTraverse // Modules are hashable by identity in CPython (tp_hash = PyObject_GenericHash). // CPython: Objects/moduleobject.c:766 PyModule_Type (tp_hash not overridden → id-based) ModuleType.Hash = IdentityHash @@ -62,6 +71,9 @@ func init() { ModuleType.TpNew = func(cls *Type, args []Object, kwargs map[string]Object) (Object, error) { m := &Module{dict: NewDict()} m.init(cls) + if h := GCTrackHook; h != nil { + h(m) + } return m, nil } @@ -162,6 +174,9 @@ func NewModule(name string) *Module { m := &Module{dict: NewDict()} m.init(ModuleType) _ = m.dict.SetItem(NewStr("__name__"), NewStr(name)) + if h := GCTrackHook; h != nil { + h(m) + } return m } @@ -180,9 +195,27 @@ func NewModuleWithDict(name string, d *Dict) *Module { if has, _ := d.Contains(NewStr("__name__")); !has { _ = d.SetItem(NewStr("__name__"), NewStr(name)) } + if h := GCTrackHook; h != nil { + h(m) + } return m } +// moduleTraverse visits the module's __dict__ (md_dict) and per-module +// state so the cycle collector can account for the references a module +// holds. CPython's module_traverse also visits md_dict. +// +// CPython: Objects/moduleobject.c:739 module_traverse +func moduleTraverse(o Object, visit Visitor) error { + m := o.(*Module) + if m.dict != nil { + if err := visit(m.dict); err != nil { + return err + } + } + return nil +} + // Dict returns the module's attribute dict (__dict__). // // CPython: Objects/moduleobject.c:459 PyModule_GetDict @@ -418,31 +451,42 @@ func moduleSetattr(o Object, name, value Object) error { return m.dict.SetItem(name, value) } -// moduleRepr returns the canonical module repr. -// Four forms mirror CPython: -// - when __file__ is set -// - when __spec__.origin == 'built-in' -// - when __spec__.origin == 'frozen' -// - otherwise +// moduleRepr returns a module's repr by forwarding to the vendored +// importlib._bootstrap._module_repr, exactly as CPython's C module_repr +// delegates through _PyImport_ImportlibModuleRepr. The Python +// implementation handles the __spec__, __loader__ and __file__ variants +// (including namespace packages and the '?' name fallback) so the +// rendering matches CPython byte-for-byte. +// +// During early bootstrap (before vm.init wires the hook) the importlib +// machinery is not yet usable, so fall back to a minimal Go rendering +// that mirrors the catch-all branch of _module_repr. // -// CPython: Objects/moduleobject.c:228 module_repr +// CPython: Objects/moduleobject.c:848 module_repr +// CPython: Python/import.c:3346 _PyImport_ImportlibModuleRepr func moduleRepr(o Object) (string, error) { + if ModuleReprHook != nil { + return ModuleReprHook(o) + } + return ModuleReprFallback(o) +} + +// ModuleReprFallback renders the catch-all branch of +// importlib._bootstrap._module_repr without importing anything, for use +// before the import machinery is available. +// +// CPython: Lib/importlib/_bootstrap.py:544 _module_repr +func ModuleReprFallback(o Object) (string, error) { m := o.(*Module) - name := moduleStrAttr(m, "__name__") + name := "?" + if n, err := m.dict.GetItem(NewStr("__name__")); err == nil && n != nil { + if s, ok := n.(*Unicode); ok { + name = s.v + } + } if file := moduleStrAttr(m, "__file__"); file != "" { return fmt.Sprintf("", name, file), nil } - if spec, err := m.dict.GetItem(NewStr("__spec__")); err == nil && spec != nil { - if sm, ok := spec.(*Module); ok { - origin := moduleStrAttr(sm, "origin") - if origin == "built-in" { - return fmt.Sprintf("", name), nil - } - if origin == "frozen" { - return fmt.Sprintf("", name), nil - } - } - } return fmt.Sprintf("", name), nil } diff --git a/stdlib/importlib/_bootstrap_external.py b/stdlib/importlib/_bootstrap_external.py index 83b6e404..14b4c5a0 100644 --- a/stdlib/importlib/_bootstrap_external.py +++ b/stdlib/importlib/_bootstrap_external.py @@ -402,3 +402,116 @@ def source_from_cache(path): "alphanumeric value") base_filename = pycache_filename.partition('.')[0] return _path_join(head, base_filename + SOURCE_SUFFIXES[0]) + + +# CPython: Lib/importlib/_bootstrap_external.py:1085 _NamespacePath +class _NamespacePath: + """Represents a namespace package's path. It uses the module name + to find its parent module, and from there it looks up the parent's + __path__. When this changes, the module's own path is recomputed, + using path_finder. For top-level modules, the parent module's path + is sys.path.""" + + # When invalidate_caches() is called, this epoch is incremented + # https://bugs.python.org/issue45703 + _epoch = 0 + + def __init__(self, name, path, path_finder): + self._name = name + self._path = path + self._last_parent_path = tuple(self._get_parent_path()) + self._last_epoch = self._epoch + self._path_finder = path_finder + + def _find_parent_path_names(self): + """Returns a tuple of (parent-module-name, parent-path-attr-name)""" + parent, dot, me = self._name.rpartition('.') + if dot == '': + # This is a top-level module. sys.path contains the parent path. + return 'sys', 'path' + # Not a top-level module. parent-module.__path__ contains the + # parent path. + return parent, '__path__' + + def _get_parent_path(self): + parent_module_name, path_attr_name = self._find_parent_path_names() + return getattr(sys.modules[parent_module_name], path_attr_name) + + def _recalculate(self): + # If the parent's path has changed, recalculate _path + parent_path = tuple(self._get_parent_path()) # Make a copy + if parent_path != self._last_parent_path or self._epoch != self._last_epoch: + spec = self._path_finder(self._name, parent_path) + # Note that no changes are made if a loader is returned, but we + # do remember the new parent path + if spec is not None and spec.loader is None: + if spec.submodule_search_locations: + self._path = spec.submodule_search_locations + self._last_parent_path = parent_path # Save the copy + self._last_epoch = self._epoch + return self._path + + def __iter__(self): + return iter(self._recalculate()) + + def __getitem__(self, index): + return self._recalculate()[index] + + def __setitem__(self, index, path): + self._path[index] = path + + def __len__(self): + return len(self._recalculate()) + + def __repr__(self): + return f'_NamespacePath({self._path!r})' + + def __contains__(self, item): + return item in self._recalculate() + + def append(self, item): + self._path.append(item) + + +# This class is actually exposed publicly in a namespace package's __loader__ +# attribute, so it should be available through a non-private name. +# https://github.com/python/cpython/issues/92054 +# CPython: Lib/importlib/_bootstrap_external.py:1156 NamespaceLoader +class NamespaceLoader: + def __init__(self, name, path, path_finder): + self._path = _NamespacePath(name, path, path_finder) + + def is_package(self, fullname): + return True + + def get_source(self, fullname): + return '' + + def get_code(self, fullname): + return compile('', '', 'exec', dont_inherit=True) + + def create_module(self, spec): + """Use default semantics for module creation.""" + + def exec_module(self, module): + pass + + def load_module(self, fullname): + """Load a namespace module. + + This method is deprecated. Use exec_module() instead. + + """ + # The import system never calls this method. + _bootstrap._verbose_message('namespace module loaded with path {!r}', + self._path) + # Warning implemented in _load_module_shim(). + return _bootstrap._load_module_shim(self, fullname) + + def get_resource_reader(self, module): + from importlib.readers import NamespaceReader + return NamespaceReader(self._path) + + +# We use this exclusively in module_from_spec() for backward-compatibility. +_NamespaceLoader = NamespaceLoader diff --git a/stdlib/importlib/machinery.py b/stdlib/importlib/machinery.py index 66201a6b..e041bfb5 100644 --- a/stdlib/importlib/machinery.py +++ b/stdlib/importlib/machinery.py @@ -14,6 +14,7 @@ from importlib._bootstrap_external import ( FileLoader, + NamespaceLoader, SourceFileLoader, ) diff --git a/stdlib/test/test_module/__init__.py b/stdlib/test/test_module/__init__.py new file mode 100644 index 00000000..22132b01 --- /dev/null +++ b/stdlib/test/test_module/__init__.py @@ -0,0 +1,402 @@ +# Test the module type +import importlib.machinery +import unittest +import weakref +from test.support import gc_collect +from test.support import import_helper +from test.support.script_helper import assert_python_ok + +import sys +ModuleType = type(sys) + + +class FullLoader: + pass + + +class BareLoader: + pass + + +class ModuleTests(unittest.TestCase): + def test_uninitialized(self): + # An uninitialized module has no __dict__ or __name__, + # and __doc__ is None + foo = ModuleType.__new__(ModuleType) + self.assertTrue(isinstance(foo.__dict__, dict)) + self.assertEqual(dir(foo), []) + try: + s = foo.__name__ + self.fail("__name__ = %s" % repr(s)) + except AttributeError: + pass + self.assertEqual(foo.__doc__, ModuleType.__doc__ or '') + + def test_uninitialized_missing_getattr(self): + # Issue 8297 + # test the text in the AttributeError of an uninitialized module + foo = ModuleType.__new__(ModuleType) + self.assertRaisesRegex( + AttributeError, "module has no attribute 'not_here'", + getattr, foo, "not_here") + + def test_missing_getattr(self): + # Issue 8297 + # test the text in the AttributeError + foo = ModuleType("foo") + self.assertRaisesRegex( + AttributeError, "module 'foo' has no attribute 'not_here'", + getattr, foo, "not_here") + + def test_no_docstring(self): + # Regularly initialized module, no docstring + foo = ModuleType("foo") + self.assertEqual(foo.__name__, "foo") + self.assertEqual(foo.__doc__, None) + self.assertIs(foo.__loader__, None) + self.assertIs(foo.__package__, None) + self.assertIs(foo.__spec__, None) + self.assertEqual(foo.__dict__, {"__name__": "foo", "__doc__": None, + "__loader__": None, "__package__": None, + "__spec__": None}) + + def test_ascii_docstring(self): + # ASCII docstring + foo = ModuleType("foo", "foodoc") + self.assertEqual(foo.__name__, "foo") + self.assertEqual(foo.__doc__, "foodoc") + self.assertEqual(foo.__dict__, + {"__name__": "foo", "__doc__": "foodoc", + "__loader__": None, "__package__": None, + "__spec__": None}) + + def test_unicode_docstring(self): + # Unicode docstring + foo = ModuleType("foo", "foodoc\u1234") + self.assertEqual(foo.__name__, "foo") + self.assertEqual(foo.__doc__, "foodoc\u1234") + self.assertEqual(foo.__dict__, + {"__name__": "foo", "__doc__": "foodoc\u1234", + "__loader__": None, "__package__": None, + "__spec__": None}) + + def test_reinit(self): + # Reinitialization should not replace the __dict__ + foo = ModuleType("foo", "foodoc\u1234") + foo.bar = 42 + d = foo.__dict__ + foo.__init__("foo", "foodoc") + self.assertEqual(foo.__name__, "foo") + self.assertEqual(foo.__doc__, "foodoc") + self.assertEqual(foo.bar, 42) + self.assertEqual(foo.__dict__, + {"__name__": "foo", "__doc__": "foodoc", "bar": 42, + "__loader__": None, "__package__": None, "__spec__": None}) + self.assertTrue(foo.__dict__ is d) + + def test_dont_clear_dict(self): + # See issue 7140. + def f(): + foo = ModuleType("foo") + foo.bar = 4 + return foo + gc_collect() + self.assertEqual(f().__dict__["bar"], 4) + + def test_clear_dict_in_ref_cycle(self): + destroyed = [] + m = ModuleType("foo") + m.destroyed = destroyed + s = """class A: + def __init__(self, l): + self.l = l + def __del__(self): + self.l.append(1) +a = A(destroyed)""" + exec(s, m.__dict__) + del m + gc_collect() + self.assertEqual(destroyed, [1]) + + def test_weakref(self): + m = ModuleType("foo") + wr = weakref.ref(m) + self.assertIs(wr(), m) + del m + gc_collect() + self.assertIs(wr(), None) + + def test_module_getattr(self): + import test.test_module.good_getattr as gga + from test.test_module.good_getattr import test + self.assertEqual(test, "There is test") + self.assertEqual(gga.x, 1) + self.assertEqual(gga.y, 2) + with self.assertRaisesRegex(AttributeError, + "Deprecated, use whatever instead"): + gga.yolo + self.assertEqual(gga.whatever, "There is whatever") + del sys.modules['test.test_module.good_getattr'] + + def test_module_getattr_errors(self): + import test.test_module.bad_getattr as bga + from test.test_module import bad_getattr2 + self.assertEqual(bga.x, 1) + self.assertEqual(bad_getattr2.x, 1) + with self.assertRaises(TypeError): + bga.nope + with self.assertRaises(TypeError): + bad_getattr2.nope + del sys.modules['test.test_module.bad_getattr'] + if 'test.test_module.bad_getattr2' in sys.modules: + del sys.modules['test.test_module.bad_getattr2'] + + def test_module_dir(self): + import test.test_module.good_getattr as gga + self.assertEqual(dir(gga), ['a', 'b', 'c']) + del sys.modules['test.test_module.good_getattr'] + + def test_module_dir_errors(self): + import test.test_module.bad_getattr as bga + from test.test_module import bad_getattr2 + with self.assertRaises(TypeError): + dir(bga) + with self.assertRaises(TypeError): + dir(bad_getattr2) + del sys.modules['test.test_module.bad_getattr'] + if 'test.test_module.bad_getattr2' in sys.modules: + del sys.modules['test.test_module.bad_getattr2'] + + def test_module_getattr_tricky(self): + from test.test_module import bad_getattr3 + # these lookups should not crash + with self.assertRaises(AttributeError): + bad_getattr3.one + with self.assertRaises(AttributeError): + bad_getattr3.delgetattr + if 'test.test_module.bad_getattr3' in sys.modules: + del sys.modules['test.test_module.bad_getattr3'] + + def test_module_repr_minimal(self): + # reprs when modules have no __file__, __name__, or __loader__ + m = ModuleType('foo') + del m.__name__ + self.assertEqual(repr(m), "") + + def test_module_repr_with_name(self): + m = ModuleType('foo') + self.assertEqual(repr(m), "") + + def test_module_repr_with_name_and_filename(self): + m = ModuleType('foo') + m.__file__ = '/tmp/foo.py' + self.assertEqual(repr(m), "") + + def test_module_repr_with_filename_only(self): + m = ModuleType('foo') + del m.__name__ + m.__file__ = '/tmp/foo.py' + self.assertEqual(repr(m), "") + + def test_module_repr_with_loader_as_None(self): + m = ModuleType('foo') + assert m.__loader__ is None + self.assertEqual(repr(m), "") + + def test_module_repr_with_bare_loader_but_no_name(self): + m = ModuleType('foo') + del m.__name__ + # Yes, a class not an instance. + m.__loader__ = BareLoader + loader_repr = repr(BareLoader) + self.assertEqual( + repr(m), "".format(loader_repr)) + + def test_module_repr_with_full_loader_but_no_name(self): + # m.__loader__.module_repr() will fail because the module has no + # m.__name__. This exception will get suppressed and instead the + # loader's repr will be used. + m = ModuleType('foo') + del m.__name__ + # Yes, a class not an instance. + m.__loader__ = FullLoader + loader_repr = repr(FullLoader) + self.assertEqual( + repr(m), "".format(loader_repr)) + + def test_module_repr_with_bare_loader(self): + m = ModuleType('foo') + # Yes, a class not an instance. + m.__loader__ = BareLoader + module_repr = repr(BareLoader) + self.assertEqual( + repr(m), "".format(module_repr)) + + def test_module_repr_with_full_loader(self): + m = ModuleType('foo') + # Yes, a class not an instance. + m.__loader__ = FullLoader + self.assertEqual( + repr(m), f")>") + + def test_module_repr_with_bare_loader_and_filename(self): + m = ModuleType('foo') + # Yes, a class not an instance. + m.__loader__ = BareLoader + m.__file__ = '/tmp/foo.py' + self.assertEqual(repr(m), "") + + def test_module_repr_with_full_loader_and_filename(self): + m = ModuleType('foo') + # Yes, a class not an instance. + m.__loader__ = FullLoader + m.__file__ = '/tmp/foo.py' + self.assertEqual(repr(m), "") + + def test_module_repr_builtin(self): + self.assertEqual(repr(sys), "") + + def test_module_repr_source(self): + r = repr(unittest) + starts_with = "") + + def test_module_repr_with_namespace_package_and_custom_loader(self): + m = ModuleType('foo') + loader = BareLoader() + spec = importlib.machinery.ModuleSpec('foo', loader) + m.__loader__ = loader + m.__spec__ = spec + expected_repr_pattern = r"\)>" + self.assertRegex(repr(m), expected_repr_pattern) + self.assertNotIn('from', repr(m)) + + def test_module_repr_with_fake_namespace_package(self): + m = ModuleType('foo') + loader = BareLoader() + loader._path = ['spam'] + spec = importlib.machinery.ModuleSpec('foo', loader) + m.__loader__ = loader + m.__spec__ = spec + expected_repr_pattern = r"\)>" + self.assertRegex(repr(m), expected_repr_pattern) + self.assertNotIn('from', repr(m)) + + def test_module_finalization_at_shutdown(self): + # Module globals and builtins should still be available during shutdown + rc, out, err = assert_python_ok("-c", "from test.test_module import final_a") + self.assertFalse(err) + lines = out.splitlines() + self.assertEqual(set(lines), { + b"x = a", + b"x = b", + b"final_a.x = a", + b"final_b.x = b", + b"len = len", + b"shutil.rmtree = rmtree"}) + + def test_descriptor_errors_propagate(self): + class Descr: + def __get__(self, o, t): + raise RuntimeError + class M(ModuleType): + melon = Descr() + self.assertRaises(RuntimeError, getattr, M("mymod"), "melon") + + def test_lazy_create_annotations(self): + # module objects lazy create their __annotations__ dict on demand. + # the annotations dict is stored in module.__dict__. + # a freshly created module shouldn't have an annotations dict yet. + foo = ModuleType("foo") + for i in range(4): + self.assertFalse("__annotations__" in foo.__dict__) + d = foo.__annotations__ + self.assertTrue("__annotations__" in foo.__dict__) + self.assertEqual(foo.__annotations__, d) + self.assertEqual(foo.__dict__['__annotations__'], d) + if i % 2: + del foo.__annotations__ + else: + del foo.__dict__['__annotations__'] + + def test_setting_annotations(self): + foo = ModuleType("foo") + for i in range(4): + self.assertFalse("__annotations__" in foo.__dict__) + d = {'a': int} + foo.__annotations__ = d + self.assertTrue("__annotations__" in foo.__dict__) + self.assertEqual(foo.__annotations__, d) + self.assertEqual(foo.__dict__['__annotations__'], d) + if i % 2: + del foo.__annotations__ + else: + del foo.__dict__['__annotations__'] + + def test_annotations_getset_raises(self): + # double delete + foo = ModuleType("foo") + foo.__annotations__ = {} + del foo.__annotations__ + with self.assertRaises(AttributeError): + del foo.__annotations__ + + def test_annotations_are_created_correctly(self): + ann_module4 = import_helper.import_fresh_module( + 'test.typinganndata.ann_module4', + ) + self.assertFalse("__annotations__" in ann_module4.__dict__) + self.assertEqual(ann_module4.__annotations__, {"a": int, "b": str}) + self.assertTrue("__annotations__" in ann_module4.__dict__) + del ann_module4.__annotations__ + self.assertFalse("__annotations__" in ann_module4.__dict__) + + + def test_repeated_attribute_pops(self): + # Repeated accesses to module attribute will be specialized + # Check that popping the attribute doesn't break it + m = ModuleType("test") + d = m.__dict__ + count = 0 + for _ in range(100): + m.attr = 1 + count += m.attr # Might be specialized + d.pop("attr") + self.assertEqual(count, 100) + + # frozen and namespace module reprs are tested in importlib. + + def test_subclass_with_slots(self): + # In 3.11alpha this crashed, as the slots weren't NULLed. + + class ModuleWithSlots(ModuleType): + __slots__ = ("a", "b") + + def __init__(self, name): + super().__init__(name) + + m = ModuleWithSlots("name") + with self.assertRaises(AttributeError): + m.a + with self.assertRaises(AttributeError): + m.b + m.a, m.b = 1, 2 + self.assertEqual(m.a, 1) + self.assertEqual(m.b, 2) + + + +if __name__ == '__main__': + unittest.main() diff --git a/stdlib/test/test_module/bad_getattr.py b/stdlib/test/test_module/bad_getattr.py new file mode 100644 index 00000000..16f901b1 --- /dev/null +++ b/stdlib/test/test_module/bad_getattr.py @@ -0,0 +1,4 @@ +x = 1 + +__getattr__ = "Surprise!" +__dir__ = "Surprise again!" diff --git a/stdlib/test/test_module/bad_getattr2.py b/stdlib/test/test_module/bad_getattr2.py new file mode 100644 index 00000000..0a52a53b --- /dev/null +++ b/stdlib/test/test_module/bad_getattr2.py @@ -0,0 +1,7 @@ +def __getattr__(): + "Bad one" + +x = 1 + +def __dir__(bad_sig): + return [] diff --git a/stdlib/test/test_module/bad_getattr3.py b/stdlib/test/test_module/bad_getattr3.py new file mode 100644 index 00000000..0d5f9266 --- /dev/null +++ b/stdlib/test/test_module/bad_getattr3.py @@ -0,0 +1,5 @@ +def __getattr__(name): + if name != 'delgetattr': + raise AttributeError + del globals()['__getattr__'] + raise AttributeError diff --git a/stdlib/test/test_module/final_a.py b/stdlib/test/test_module/final_a.py new file mode 100644 index 00000000..a983f311 --- /dev/null +++ b/stdlib/test/test_module/final_a.py @@ -0,0 +1,19 @@ +""" +Fodder for module finalization tests in test_module. +""" + +import shutil +import test.test_module.final_b + +x = 'a' + +class C: + def __del__(self): + # Inspect module globals and builtins + print("x =", x) + print("final_b.x =", test.test_module.final_b.x) + print("shutil.rmtree =", getattr(shutil.rmtree, '__name__', None)) + print("len =", getattr(len, '__name__', None)) + +c = C() +_underscored = C() diff --git a/stdlib/test/test_module/final_b.py b/stdlib/test/test_module/final_b.py new file mode 100644 index 00000000..f3e8d559 --- /dev/null +++ b/stdlib/test/test_module/final_b.py @@ -0,0 +1,19 @@ +""" +Fodder for module finalization tests in test_module. +""" + +import shutil +import test.test_module.final_a + +x = 'b' + +class C: + def __del__(self): + # Inspect module globals and builtins + print("x =", x) + print("final_a.x =", test.test_module.final_a.x) + print("shutil.rmtree =", getattr(shutil.rmtree, '__name__', None)) + print("len =", getattr(len, '__name__', None)) + +c = C() +_underscored = C() diff --git a/stdlib/test/test_module/good_getattr.py b/stdlib/test/test_module/good_getattr.py new file mode 100644 index 00000000..7d27de62 --- /dev/null +++ b/stdlib/test/test_module/good_getattr.py @@ -0,0 +1,11 @@ +x = 1 + +def __dir__(): + return ['a', 'b', 'c'] + +def __getattr__(name): + if name == "yolo": + raise AttributeError("Deprecated, use whatever instead") + return f"There is {name}" + +y = 2 diff --git a/vm/copyreg_hook.go b/vm/copyreg_hook.go index ccabb6d4..a477f5a2 100644 --- a/vm/copyreg_hook.go +++ b/vm/copyreg_hook.go @@ -20,6 +20,52 @@ func init() { objects.BuiltinLookup = builtinLookup objects.CurrentBuiltinsHook = currentBuiltins objects.ImportModuleHook = importModuleByName + objects.ModuleReprHook = moduleReprViaImportlib +} + +// moduleReprViaImportlib renders a module's repr by calling +// importlib._bootstrap._module_repr, the same delegation CPython's C +// module_repr performs through _PyImport_ImportlibModuleRepr. Any +// failure to reach importlib falls back to the minimal Go rendering so +// repr() never raises. +// +// CPython: Python/import.c:3346 _PyImport_ImportlibModuleRepr +func moduleReprViaImportlib(m objects.Object) (string, error) { + bootstrap, ok := imp.GetModule("importlib._bootstrap") + if !ok || bootstrap == nil { + mod, err := importModuleByName("importlib._bootstrap") + if err != nil || mod == nil { + return objects.ModuleReprFallback(m) + } + var modOk bool + if bootstrap, modOk = mod.(*objects.Module); !modOk { + return objects.ModuleReprFallback(m) + } + } + // importlib._bootstrap caches the _bootstrap_external module in a + // module global, normally wired by _install_external_importers during + // the frozen bootstrap. gopy resolves imports Go-side and never runs + // that hook, so _module_repr_from_spec's isinstance(loader, + // NamespaceLoader) check would always miss. Wire the global the way + // _install_external_importers does so the namespace-package repr (and + // the other consumers of the cached module) behave like CPython. + // + // CPython: Lib/importlib/_bootstrap.py:1565 _install_external_importers + if cur, _ := bootstrap.Dict().GetItem(objects.NewStr("_bootstrap_external")); cur == nil || cur == objects.None() { + ext, err := importModuleByName("importlib._bootstrap_external") + if err == nil && ext != nil { + _ = bootstrap.Dict().SetItem(objects.NewStr("_bootstrap_external"), ext) + } + } + fn, err := bootstrap.Dict().GetItem(objects.NewStr("_module_repr")) + if err != nil || fn == nil { + return objects.ModuleReprFallback(m) + } + res, err := objects.Call(fn, objects.NewTuple([]objects.Object{m}), nil) + if err != nil { + return objects.ModuleReprFallback(m) + } + return objects.Str(res) } // importModuleByName imports an absolute module name, returning the From fa1e7f1e68bfa440c7cc5c86e265da2ba3430118 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 00:41:39 +0700 Subject: [PATCH 14/84] zlib: return crc32/adler32 as unsigned 32-bit ints --- module/zlib/module.go | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/module/zlib/module.go b/module/zlib/module.go index 201955f3..56ccc663 100644 --- a/module/zlib/module.go +++ b/module/zlib/module.go @@ -512,8 +512,11 @@ func zlibCRC32(args []objects.Object, kwargs map[string]objects.Object) (objects } result := crc32.Update(prev, crc32.IEEETable, data) - // CPython returns a signed 32-bit integer widened to Python int. - return objects.NewInt(int64(int32(result))), nil + // CPython returns the checksum as an unsigned 32-bit value widened to + // a Python int (PyLong_FromUnsignedLong(value & 0xffffffffU)). + // + // CPython: Modules/zlibmodule.c:1901 zlib_crc32_impl + return objects.NewInt(int64(uint64(result))), nil } // zlibAdler32 computes the Adler-32 checksum, optionally updating a previous value. @@ -545,7 +548,11 @@ func zlibAdler32(args []objects.Object, kwargs map[string]objects.Object) (objec } result := adler32Update(prev, data) - return objects.NewInt(int64(int32(result))), nil + // CPython returns the checksum as an unsigned 32-bit value widened to + // a Python int (PyLong_FromUnsignedLong(value & 0xffffffffU)). + // + // CPython: Modules/zlibmodule.c:1901 zlib_adler32_impl + return objects.NewInt(int64(uint64(result))), nil } // zlibCompressobj returns a streaming Compress object. From 91ca41142b1bc44ca146bb6ed47493982cfba336 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 00:51:29 +0700 Subject: [PATCH 15/84] zipimport: vendor Lib/zipimport.py and wire bootstrap helpers zipimport plugs into sys.path_hooks and leans on _bootstrap_external for the loader machinery. CPython freezes _bootstrap/_bootstrap_external and runs _setup()/_install_external_importers() at startup to inject sys, _imp and cross-link the two modules; gopy imports them like ordinary modules and never runs that startup, so the bindings have to happen at import time. Bind sys/_imp into _bootstrap, point _bootstrap_external back at _bootstrap, and have _bootstrap_external register itself as _bootstrap._bootstrap_external at the end of its module body. Also fill in the _bootstrap_external pieces zipimport reaches for: _path_stat, _LoaderBasics, _compile_bytecode, SourcelessFileLoader, spec_from_file_location, _get_supported_file_loaders and _fix_up_module. --- stdlib/importlib/_bootstrap.py | 7 + stdlib/importlib/_bootstrap_external.py | 217 +++++++ stdlib/zipimport.py | 825 ++++++++++++++++++++++++ 3 files changed, 1049 insertions(+) create mode 100644 stdlib/zipimport.py diff --git a/stdlib/importlib/_bootstrap.py b/stdlib/importlib/_bootstrap.py index 9d911e1d..e9efa803 100644 --- a/stdlib/importlib/_bootstrap.py +++ b/stdlib/importlib/_bootstrap.py @@ -28,6 +28,13 @@ def _object_name(obj): # Bootstrap-related code ###################################################### +# CPython freezes this module and injects sys / _imp through _setup() +# during interpreter start. gopy imports it like any other module and +# never runs _setup(), so bind the two modules the bootstrap code needs +# (sys.modules access, _imp for built-in queries) at import time. +import sys +import _imp + # Modules injected manually by _setup() _thread = None _warnings = None diff --git a/stdlib/importlib/_bootstrap_external.py b/stdlib/importlib/_bootstrap_external.py index 14b4c5a0..43b73849 100644 --- a/stdlib/importlib/_bootstrap_external.py +++ b/stdlib/importlib/_bootstrap_external.py @@ -14,6 +14,15 @@ import os as _os import sys +# CPython freezes _bootstrap and wires it through _set_bootstrap_module +# during _install. gopy resolves imports Go-side and never runs that +# install, so bind the companion module directly. _bootstrap does not +# import _bootstrap_external at load time (it keeps a lazily-populated +# global), so this top-level import does not create a cycle. +# +# CPython: Lib/importlib/_bootstrap_external.py:1553 _set_bootstrap_module +import importlib._bootstrap as _bootstrap + _MS_WINDOWS = (sys.platform == 'win32') if _MS_WINDOWS: @@ -263,6 +272,89 @@ def exec_module(self, module): exec(code, module.__dict__) +# CPython: Lib/importlib/_bootstrap_external.py:145 _path_stat +def _path_stat(path): + """Stat the path. + + Made a separate function to make it easier to override in experiments + (e.g. cache stat results). + """ + return _os.stat(path) + + +# CPython: Lib/importlib/_bootstrap_external.py:737 _LoaderBasics +class _LoaderBasics: + """Base class of common code needed by both SourceLoader and + SourcelessFileLoader, and the base class zipimport.zipimporter + derives from.""" + + def is_package(self, fullname): + """Concrete implementation of InspectLoader.is_package by checking if + the path returned by get_filename has a filename of '__init__.py'.""" + filename = _path_split(self.get_filename(fullname))[1] + filename_base = filename.rsplit('.', 1)[0] + tail_name = fullname.rpartition('.')[2] + return filename_base == '__init__' and tail_name != '__init__' + + def create_module(self, spec): + """Use default semantics for module creation.""" + + def exec_module(self, module): + """Execute the module.""" + code = self.get_code(module.__name__) + if code is None: + raise ImportError(f'cannot load module {module.__name__!r} when ' + 'get_code() returns None') + _bootstrap._call_with_frames_removed(exec, code, module.__dict__) + + def load_module(self, fullname): + """This method is deprecated.""" + # Warning implemented in _load_module_shim(). + return _bootstrap._load_module_shim(self, fullname) + + +# CPython: Lib/importlib/_bootstrap_external.py:509 _compile_bytecode +def _compile_bytecode(data, name=None, bytecode_path=None, source_path=None): + """Compile bytecode as found in a pyc.""" + code = marshal.loads(data) + if isinstance(code, _code_type): + _bootstrap._verbose_message('code object from {!r}', bytecode_path) + if source_path is not None: + _imp._fix_co_filename(code, source_path) + return code + else: + raise ImportError(f'Non-code object in {bytecode_path!r}', + name=name, path=bytecode_path) + + +_code_type = type(_compile_bytecode.__code__) + + +# CPython: Lib/importlib/_bootstrap_external.py:1007 SourcelessFileLoader +class SourcelessFileLoader(FileLoader, _LoaderBasics): + """Loader which handles sourceless file imports.""" + + def get_code(self, fullname): + path = self.get_filename(fullname) + data = self.get_data(path) + # Call _classify_pyc to do basic validation of the pyc but ignore the + # result. There's no source to check against. + exc_details = { + 'name': fullname, + 'path': path, + } + _classify_pyc(data, fullname, exc_details) + return _compile_bytecode( + memoryview(data)[16:], + name=fullname, + bytecode_path=path, + ) + + def get_source(self, fullname): + """Return None as there is no source code.""" + return None + + # CPython: Lib/importlib/_bootstrap_external.py:101 _path_join def _path_join(*path_parts): """Replacement for os.path.join().""" @@ -298,6 +390,120 @@ def _path_abspath(path): return path +# A sentinel telling spec_from_file_location to populate +# submodule_search_locations from the loader. +_POPULATE = object() + + +# CPython: Lib/importlib/_bootstrap_external.py:560 spec_from_file_location +def spec_from_file_location(name, location=None, *, loader=None, + submodule_search_locations=_POPULATE): + """Return a module spec based on a file location. + + To indicate that the module is a package, set + submodule_search_locations to a list of directory paths. An + empty list is sufficient, though its not otherwise useful to the + import system. + + The loader must take a spec as its only __init__() arg. + """ + if location is None: + # The caller may simply want a partially populated location- + # oriented spec. So we set the location to a bogus value and + # fill in as much as we can. + location = '' + if hasattr(loader, 'get_filename'): + # ExecutionLoader + try: + location = loader.get_filename(name) + except ImportError: + pass + else: + location = _os.fspath(location) + try: + location = _path_abspath(location) + except OSError: + pass + + # If the location is on the filesystem, but doesn't actually exist, + # we could return None here, indicating that the location is not + # valid. However, we don't have a good way of testing since an + # indirect location (e.g. a zip file or URL) will look like a + # non-existent file relative to the filesystem. + + spec = _bootstrap.ModuleSpec(name, loader, origin=location) + spec._set_fileattr = True + + # Pick a loader if one wasn't provided. + if loader is None: + for loader_class, suffixes in _get_supported_file_loaders(): + if location.endswith(tuple(suffixes)): + loader = loader_class(name, location) + spec.loader = loader + break + else: + return None + + # Set submodule_search_paths appropriately. + if submodule_search_locations is _POPULATE: + # Check the loader. + if hasattr(loader, 'is_package'): + try: + is_package = loader.is_package(name) + except ImportError: + pass + else: + if is_package: + spec.submodule_search_locations = [] + else: + spec.submodule_search_locations = submodule_search_locations + if spec.submodule_search_locations == []: + if location: + dirname = _path_split(location)[0] + spec.submodule_search_locations.append(dirname) + + return spec + + +# CPython: Lib/importlib/_bootstrap_external.py:1534 _get_supported_file_loaders +def _get_supported_file_loaders(): + """Returns a list of file-based module loaders. + + Each item is a tuple (loader, suffixes). gopy's import system is + Go-side and exposes no extension loader, so the list carries only + the source and sourceless file loaders. + """ + source = SourceFileLoader, SOURCE_SUFFIXES + bytecode = SourcelessFileLoader, BYTECODE_SUFFIXES + return [source, bytecode] + + +# CPython: Lib/importlib/_bootstrap_external.py:1509 _fix_up_module +def _fix_up_module(ns, name, pathname, cpathname=None): + # This function is used by PyImport_ExecCodeModuleObject(). + loader = ns.get('__loader__') + spec = ns.get('__spec__') + if not loader: + if spec: + loader = spec.loader + elif pathname == cpathname: + loader = SourcelessFileLoader(name, pathname) + else: + loader = SourceFileLoader(name, pathname) + if not spec: + spec = spec_from_file_location(name, pathname, loader=loader) + if cpathname: + spec.cached = _path_abspath(cpathname) + try: + ns['__spec__'] = spec + ns['__loader__'] = loader + ns['__file__'] = pathname + ns['__cached__'] = cpathname + except Exception: + # Not important enough to report. + pass + + # CPython: Lib/importlib/_bootstrap_external.py:239 cache_from_source def cache_from_source(path, debug_override=None, *, optimization=None): """Given the path to a .py file, return the path to its .pyc file. @@ -515,3 +721,14 @@ def get_resource_reader(self, module): # We use this exclusively in module_from_spec() for backward-compatibility. _NamespaceLoader = NamespaceLoader + + +# CPython wires this module into _bootstrap during +# _install_external_importers (_bootstrap_external = _frozen_importlib_external). +# gopy imports the bootstrap modules normally and never runs that install, +# so publish ourselves to _bootstrap here. This is what lets +# _bootstrap.spec_from_loader reach spec_from_file_location and lets +# _module_repr_from_spec recognise NamespaceLoader. +# +# CPython: Lib/importlib/_bootstrap.py:1565 _install_external_importers +_bootstrap._bootstrap_external = sys.modules[__name__] diff --git a/stdlib/zipimport.py b/stdlib/zipimport.py new file mode 100644 index 00000000..3455bbc9 --- /dev/null +++ b/stdlib/zipimport.py @@ -0,0 +1,825 @@ +"""zipimport provides support for importing Python modules from Zip archives. + +This module exports two objects: +- zipimporter: a class; its constructor takes a path to a Zip archive. +- ZipImportError: exception raised by zipimporter objects. It's a + subclass of ImportError, so it can be caught as ImportError, too. + +It is usually not needed to use the zipimport module explicitly; it is +used by the builtin import mechanism for sys.path items that are paths +to Zip archives. +""" + +# gopy resolves imports Go-side and never freezes the bootstrap modules, +# so the frozen _frozen_importlib / _frozen_importlib_external names are +# unavailable. The vendored importlib._bootstrap and +# importlib._bootstrap_external are the same source, so import them +# directly. +from importlib import _bootstrap_external +from importlib._bootstrap_external import _unpack_uint16, _unpack_uint32, _unpack_uint64 +from importlib import _bootstrap # for _verbose_message +import _imp # for check_hash_based_pycs +import _io # for open +import marshal # for loads +import sys # for modules +import time # for mktime + +__all__ = ['ZipImportError', 'zipimporter'] + + +path_sep = _bootstrap_external.path_sep +alt_path_sep = _bootstrap_external.path_separators[1:] + + +class ZipImportError(ImportError): + pass + +# _read_directory() cache +_zip_directory_cache = {} + +_module_type = type(sys) + +END_CENTRAL_DIR_SIZE = 22 +END_CENTRAL_DIR_SIZE_64 = 56 +END_CENTRAL_DIR_LOCATOR_SIZE_64 = 20 +STRING_END_ARCHIVE = b'PK\x05\x06' # standard EOCD signature +STRING_END_LOCATOR_64 = b'PK\x06\x07' # Zip64 EOCD Locator signature +STRING_END_ZIP_64 = b'PK\x06\x06' # Zip64 EOCD signature +MAX_COMMENT_LEN = (1 << 16) - 1 +MAX_UINT32 = 0xffffffff +ZIP64_EXTRA_TAG = 0x1 + +class zipimporter(_bootstrap_external._LoaderBasics): + """zipimporter(archivepath) -> zipimporter object + + Create a new zipimporter instance. 'archivepath' must be a path to + a zipfile, or to a specific path inside a zipfile. For example, it can be + '/tmp/myimport.zip', or '/tmp/myimport.zip/mydirectory', if mydirectory is a + valid directory inside the archive. + + 'ZipImportError is raised if 'archivepath' doesn't point to a valid Zip + archive. + + The 'archive' attribute of zipimporter objects contains the name of the + zipfile targeted. + """ + + # Split the "subdirectory" from the Zip archive path, lookup a matching + # entry in sys.path_importer_cache, fetch the file directory from there + # if found, or else read it from the archive. + def __init__(self, path): + if not isinstance(path, str): + raise TypeError(f"expected str, not {type(path)!r}") + if not path: + raise ZipImportError('archive path is empty', path=path) + if alt_path_sep: + path = path.replace(alt_path_sep, path_sep) + + prefix = [] + while True: + try: + st = _bootstrap_external._path_stat(path) + except (OSError, ValueError): + # On Windows a ValueError is raised for too long paths. + # Back up one path element. + dirname, basename = _bootstrap_external._path_split(path) + if dirname == path: + raise ZipImportError('not a Zip file', path=path) + path = dirname + prefix.append(basename) + else: + # it exists + if (st.st_mode & 0o170000) != 0o100000: # stat.S_ISREG + # it's a not file + raise ZipImportError('not a Zip file', path=path) + break + + if path not in _zip_directory_cache: + _zip_directory_cache[path] = _read_directory(path) + self.archive = path + # a prefix directory following the ZIP file path. + self.prefix = _bootstrap_external._path_join(*prefix[::-1]) + if self.prefix: + self.prefix += path_sep + + + def find_spec(self, fullname, target=None): + """Create a ModuleSpec for the specified module. + + Returns None if the module cannot be found. + """ + module_info = _get_module_info(self, fullname) + if module_info is not None: + return _bootstrap.spec_from_loader(fullname, self, is_package=module_info) + else: + # Not a module or regular package. See if this is a directory, and + # therefore possibly a portion of a namespace package. + + # We're only interested in the last path component of fullname + # earlier components are recorded in self.prefix. + modpath = _get_module_path(self, fullname) + if _is_dir(self, modpath): + # This is possibly a portion of a namespace + # package. Return the string representing its path, + # without a trailing separator. + path = f'{self.archive}{path_sep}{modpath}' + spec = _bootstrap.ModuleSpec(name=fullname, loader=None, + is_package=True) + spec.submodule_search_locations.append(path) + return spec + else: + return None + + def get_code(self, fullname): + """get_code(fullname) -> code object. + + Return the code object for the specified module. Raise ZipImportError + if the module couldn't be imported. + """ + code, ispackage, modpath = _get_module_code(self, fullname) + return code + + + def get_data(self, pathname): + """get_data(pathname) -> string with file data. + + Return the data associated with 'pathname'. Raise OSError if + the file wasn't found. + """ + if alt_path_sep: + pathname = pathname.replace(alt_path_sep, path_sep) + + key = pathname + if pathname.startswith(self.archive + path_sep): + key = pathname[len(self.archive + path_sep):] + + try: + toc_entry = self._get_files()[key] + except KeyError: + raise OSError(0, '', key) + if toc_entry is None: + return b'' + return _get_data(self.archive, toc_entry) + + + # Return a string matching __file__ for the named module + def get_filename(self, fullname): + """get_filename(fullname) -> filename string. + + Return the filename for the specified module or raise ZipImportError + if it couldn't be imported. + """ + # Deciding the filename requires working out where the code + # would come from if the module was actually loaded + code, ispackage, modpath = _get_module_code(self, fullname) + return modpath + + + def get_source(self, fullname): + """get_source(fullname) -> source string. + + Return the source code for the specified module. Raise ZipImportError + if the module couldn't be found, return None if the archive does + contain the module, but has no source for it. + """ + mi = _get_module_info(self, fullname) + if mi is None: + raise ZipImportError(f"can't find module {fullname!r}", name=fullname) + + path = _get_module_path(self, fullname) + if mi: + fullpath = _bootstrap_external._path_join(path, '__init__.py') + else: + fullpath = f'{path}.py' + + try: + toc_entry = self._get_files()[fullpath] + except KeyError: + # we have the module, but no source + return None + return _get_data(self.archive, toc_entry).decode() + + + # Return a bool signifying whether the module is a package or not. + def is_package(self, fullname): + """is_package(fullname) -> bool. + + Return True if the module specified by fullname is a package. + Raise ZipImportError if the module couldn't be found. + """ + mi = _get_module_info(self, fullname) + if mi is None: + raise ZipImportError(f"can't find module {fullname!r}", name=fullname) + return mi + + + # Load and return the module named by 'fullname'. + def load_module(self, fullname): + """load_module(fullname) -> module. + + Load the module specified by 'fullname'. 'fullname' must be the + fully qualified (dotted) module name. It returns the imported + module, or raises ZipImportError if it could not be imported. + + Deprecated since Python 3.10. Use exec_module() instead. + """ + import warnings + warnings._deprecated("zipimport.zipimporter.load_module", + f"{warnings._DEPRECATED_MSG}; " + "use zipimport.zipimporter.exec_module() instead", + remove=(3, 15)) + code, ispackage, modpath = _get_module_code(self, fullname) + mod = sys.modules.get(fullname) + if mod is None or not isinstance(mod, _module_type): + mod = _module_type(fullname) + sys.modules[fullname] = mod + mod.__loader__ = self + + try: + if ispackage: + # add __path__ to the module *before* the code gets + # executed + path = _get_module_path(self, fullname) + fullpath = _bootstrap_external._path_join(self.archive, path) + mod.__path__ = [fullpath] + + if not hasattr(mod, '__builtins__'): + mod.__builtins__ = __builtins__ + _bootstrap_external._fix_up_module(mod.__dict__, fullname, modpath) + exec(code, mod.__dict__) + except: + del sys.modules[fullname] + raise + + try: + mod = sys.modules[fullname] + except KeyError: + raise ImportError(f'Loaded module {fullname!r} not found in sys.modules') + _bootstrap._verbose_message('import {} # loaded from Zip {}', fullname, modpath) + return mod + + + def get_resource_reader(self, fullname): + """Return the ResourceReader for a module in a zip file.""" + from importlib.readers import ZipReader + + return ZipReader(self, fullname) + + + def _get_files(self): + """Return the files within the archive path.""" + try: + files = _zip_directory_cache[self.archive] + except KeyError: + try: + files = _zip_directory_cache[self.archive] = _read_directory(self.archive) + except ZipImportError: + files = {} + + return files + + + def invalidate_caches(self): + """Invalidates the cache of file data of the archive path.""" + _zip_directory_cache.pop(self.archive, None) + + + def __repr__(self): + return f'' + + +# _zip_searchorder defines how we search for a module in the Zip +# archive: we first search for a package __init__, then for +# non-package .pyc, and .py entries. The .pyc entries +# are swapped by initzipimport() if we run in optimized mode. Also, +# '/' is replaced by path_sep there. +_zip_searchorder = ( + (path_sep + '__init__.pyc', True, True), + (path_sep + '__init__.py', False, True), + ('.pyc', True, False), + ('.py', False, False), +) + +# Given a module name, return the potential file path in the +# archive (without extension). +def _get_module_path(self, fullname): + return self.prefix + fullname.rpartition('.')[2] + +# Does this path represent a directory? +def _is_dir(self, path): + # See if this is a "directory". If so, it's eligible to be part + # of a namespace package. We test by seeing if the name, with an + # appended path separator, exists. + dirpath = path + path_sep + # If dirpath is present in self._get_files(), we have a directory. + return dirpath in self._get_files() + +# Return some information about a module. +def _get_module_info(self, fullname): + path = _get_module_path(self, fullname) + for suffix, isbytecode, ispackage in _zip_searchorder: + fullpath = path + suffix + if fullpath in self._get_files(): + return ispackage + return None + + +# implementation + +# _read_directory(archive) -> files dict (new reference) +# +# Given a path to a Zip archive, build a dict, mapping file names +# (local to the archive, using SEP as a separator) to toc entries. +# +# A toc_entry is a tuple: +# +# (__file__, # value to use for __file__, available for all files, +# # encoded to the filesystem encoding +# compress, # compression kind; 0 for uncompressed +# data_size, # size of compressed data on disk +# file_size, # size of decompressed data +# file_offset, # offset of file header from start of archive +# time, # mod time of file (in dos format) +# date, # mod data of file (in dos format) +# crc, # crc checksum of the data +# ) +# +# Directories can be recognized by the trailing path_sep in the name, +# data_size and file_offset are 0. +def _read_directory(archive): + try: + fp = _io.open_code(archive) + except OSError: + raise ZipImportError(f"can't open Zip file: {archive!r}", path=archive) + + with fp: + # GH-87235: On macOS all file descriptors for /dev/fd/N share the same + # file offset, reset the file offset after scanning the zipfile directory + # to not cause problems when some runs 'python3 /dev/fd/9 9= 0 and pos64+END_CENTRAL_DIR_SIZE_64+END_CENTRAL_DIR_LOCATOR_SIZE_64==pos): + # Zip64 at "correct" offset from standard EOCD + buffer = data[pos64:pos64 + END_CENTRAL_DIR_SIZE_64] + if len(buffer) != END_CENTRAL_DIR_SIZE_64: + raise ZipImportError( + f"corrupt Zip64 file: Expected {END_CENTRAL_DIR_SIZE_64} byte " + f"zip64 central directory, but read {len(buffer)} bytes.", + path=archive) + header_position = file_size - len(data) + pos64 + + central_directory_size = _unpack_uint64(buffer[40:48]) + central_directory_position = _unpack_uint64(buffer[48:56]) + num_entries = _unpack_uint64(buffer[24:32]) + elif pos >= 0: + buffer = data[pos:pos+END_CENTRAL_DIR_SIZE] + if len(buffer) != END_CENTRAL_DIR_SIZE: + raise ZipImportError(f"corrupt Zip file: {archive!r}", + path=archive) + + header_position = file_size - len(data) + pos + + # Buffer now contains a valid EOCD, and header_position gives the + # starting position of it. + central_directory_size = _unpack_uint32(buffer[12:16]) + central_directory_position = _unpack_uint32(buffer[16:20]) + num_entries = _unpack_uint16(buffer[8:10]) + + # N.b. if someday you want to prefer the standard (non-zip64) EOCD, + # you need to adjust position by 76 for arc to be 0. + else: + raise ZipImportError(f'not a Zip file: {archive!r}', + path=archive) + + # Buffer now contains a valid EOCD, and header_position gives the + # starting position of it. + # XXX: These are cursory checks but are not as exact or strict as they + # could be. Checking the arc-adjusted value is probably good too. + if header_position < central_directory_size: + raise ZipImportError(f'bad central directory size: {archive!r}', path=archive) + if header_position < central_directory_position: + raise ZipImportError(f'bad central directory offset: {archive!r}', path=archive) + header_position -= central_directory_size + # On just-a-zipfile these values are the same and arc_offset is zero; if + # the file has some bytes prepended, `arc_offset` is the number of such + # bytes. This is used for pex as well as self-extracting .exe. + arc_offset = header_position - central_directory_position + if arc_offset < 0: + raise ZipImportError(f'bad central directory size or offset: {archive!r}', path=archive) + + files = {} + # Start of Central Directory + count = 0 + try: + fp.seek(header_position) + except OSError: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + while True: + buffer = fp.read(46) + if len(buffer) < 4: + raise EOFError('EOF read where not expected') + # Start of file header + if buffer[:4] != b'PK\x01\x02': + if count != num_entries: + raise ZipImportError( + f"mismatched num_entries: {count} should be {num_entries} in {archive!r}", + path=archive, + ) + break # Bad: Central Dir File Header + if len(buffer) != 46: + raise EOFError('EOF read where not expected') + flags = _unpack_uint16(buffer[8:10]) + compress = _unpack_uint16(buffer[10:12]) + time = _unpack_uint16(buffer[12:14]) + date = _unpack_uint16(buffer[14:16]) + crc = _unpack_uint32(buffer[16:20]) + data_size = _unpack_uint32(buffer[20:24]) + file_size = _unpack_uint32(buffer[24:28]) + name_size = _unpack_uint16(buffer[28:30]) + extra_size = _unpack_uint16(buffer[30:32]) + comment_size = _unpack_uint16(buffer[32:34]) + file_offset = _unpack_uint32(buffer[42:46]) + header_size = name_size + extra_size + comment_size + + try: + name = fp.read(name_size) + except OSError: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + if len(name) != name_size: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + # On Windows, calling fseek to skip over the fields we don't use is + # slower than reading the data because fseek flushes stdio's + # internal buffers. See issue #8745. + try: + extra_data_len = header_size - name_size + extra_data = memoryview(fp.read(extra_data_len)) + + if len(extra_data) != extra_data_len: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + except OSError: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + + if flags & 0x800: + # UTF-8 file names extension + name = name.decode() + else: + # Historical ZIP filename encoding + try: + name = name.decode('ascii') + except UnicodeDecodeError: + name = name.decode('latin1').translate(cp437_table) + + name = name.replace('/', path_sep) + path = _bootstrap_external._path_join(archive, name) + + # Ordering matches unpacking below. + if ( + file_size == MAX_UINT32 or + data_size == MAX_UINT32 or + file_offset == MAX_UINT32 + ): + # need to decode extra_data looking for a zip64 extra (which might not + # be present) + while extra_data: + if len(extra_data) < 4: + raise ZipImportError(f"can't read header extra: {archive!r}", path=archive) + tag = _unpack_uint16(extra_data[:2]) + size = _unpack_uint16(extra_data[2:4]) + if len(extra_data) < 4 + size: + raise ZipImportError(f"can't read header extra: {archive!r}", path=archive) + if tag == ZIP64_EXTRA_TAG: + if (len(extra_data) - 4) % 8 != 0: + raise ZipImportError(f"can't read header extra: {archive!r}", path=archive) + num_extra_values = (len(extra_data) - 4) // 8 + if num_extra_values > 3: + raise ZipImportError(f"can't read header extra: {archive!r}", path=archive) + import struct + values = list(struct.unpack_from(f"<{min(num_extra_values, 3)}Q", + extra_data, offset=4)) + + # N.b. Here be dragons: the ordering of these is different than + # the header fields, and it's really easy to get it wrong since + # naturally-occurring zips that use all 3 are >4GB + if file_size == MAX_UINT32: + file_size = values.pop(0) + if data_size == MAX_UINT32: + data_size = values.pop(0) + if file_offset == MAX_UINT32: + file_offset = values.pop(0) + + break + + # For a typical zip, this bytes-slicing only happens 2-3 times, on + # small data like timestamps and filesizes. + extra_data = extra_data[4+size:] + else: + _bootstrap._verbose_message( + "zipimport: suspected zip64 but no zip64 extra for {!r}", + path, + ) + # XXX These two statements seem swapped because `central_directory_position` + # is a position within the actual file, but `file_offset` (when compared) is + # as encoded in the entry, not adjusted for this file. + # N.b. this must be after we've potentially read the zip64 extra which can + # change `file_offset`. + if file_offset > central_directory_position: + raise ZipImportError(f'bad local header offset: {archive!r}', path=archive) + file_offset += arc_offset + + t = (path, compress, data_size, file_size, file_offset, time, date, crc) + files[name] = t + count += 1 + finally: + fp.seek(start_offset) + _bootstrap._verbose_message('zipimport: found {} names in {!r}', count, archive) + + # Add implicit directories. + count = 0 + for name in list(files): + while True: + i = name.rstrip(path_sep).rfind(path_sep) + if i < 0: + break + name = name[:i + 1] + if name in files: + break + files[name] = None + count += 1 + if count: + _bootstrap._verbose_message('zipimport: added {} implicit directories in {!r}', + count, archive) + return files + +# During bootstrap, we may need to load the encodings +# package from a ZIP file. But the cp437 encoding is implemented +# in Python in the encodings package. +# +# Break out of this dependency by using the translation table for +# the cp437 encoding. +cp437_table = ( + # ASCII part, 8 rows x 16 chars + '\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f' + '\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f' + ' !"#$%&\'()*+,-./' + '0123456789:;<=>?' + '@ABCDEFGHIJKLMNO' + 'PQRSTUVWXYZ[\\]^_' + '`abcdefghijklmno' + 'pqrstuvwxyz{|}~\x7f' + # non-ASCII part, 16 rows x 8 chars + '\xc7\xfc\xe9\xe2\xe4\xe0\xe5\xe7' + '\xea\xeb\xe8\xef\xee\xec\xc4\xc5' + '\xc9\xe6\xc6\xf4\xf6\xf2\xfb\xf9' + '\xff\xd6\xdc\xa2\xa3\xa5\u20a7\u0192' + '\xe1\xed\xf3\xfa\xf1\xd1\xaa\xba' + '\xbf\u2310\xac\xbd\xbc\xa1\xab\xbb' + '\u2591\u2592\u2593\u2502\u2524\u2561\u2562\u2556' + '\u2555\u2563\u2551\u2557\u255d\u255c\u255b\u2510' + '\u2514\u2534\u252c\u251c\u2500\u253c\u255e\u255f' + '\u255a\u2554\u2569\u2566\u2560\u2550\u256c\u2567' + '\u2568\u2564\u2565\u2559\u2558\u2552\u2553\u256b' + '\u256a\u2518\u250c\u2588\u2584\u258c\u2590\u2580' + '\u03b1\xdf\u0393\u03c0\u03a3\u03c3\xb5\u03c4' + '\u03a6\u0398\u03a9\u03b4\u221e\u03c6\u03b5\u2229' + '\u2261\xb1\u2265\u2264\u2320\u2321\xf7\u2248' + '\xb0\u2219\xb7\u221a\u207f\xb2\u25a0\xa0' +) + +_importing_zlib = False + +# Return the zlib.decompress function object, or NULL if zlib couldn't +# be imported. The function is cached when found, so subsequent calls +# don't import zlib again. +def _get_decompress_func(): + global _importing_zlib + if _importing_zlib: + # Someone has a zlib.py[co] in their Zip file + # let's avoid a stack overflow. + _bootstrap._verbose_message('zipimport: zlib UNAVAILABLE') + raise ZipImportError("can't decompress data; zlib not available") + + _importing_zlib = True + try: + from zlib import decompress + except Exception: + _bootstrap._verbose_message('zipimport: zlib UNAVAILABLE') + raise ZipImportError("can't decompress data; zlib not available") + finally: + _importing_zlib = False + + _bootstrap._verbose_message('zipimport: zlib available') + return decompress + +# Given a path to a Zip file and a toc_entry, return the (uncompressed) data. +def _get_data(archive, toc_entry): + datapath, compress, data_size, file_size, file_offset, time, date, crc = toc_entry + if data_size < 0: + raise ZipImportError('negative data size') + + with _io.open_code(archive) as fp: + # Check to make sure the local file header is correct + try: + fp.seek(file_offset) + except OSError: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + buffer = fp.read(30) + if len(buffer) != 30: + raise EOFError('EOF read where not expected') + + if buffer[:4] != b'PK\x03\x04': + # Bad: Local File Header + raise ZipImportError(f'bad local file header: {archive!r}', path=archive) + + name_size = _unpack_uint16(buffer[26:28]) + extra_size = _unpack_uint16(buffer[28:30]) + header_size = 30 + name_size + extra_size + file_offset += header_size # Start of file data + try: + fp.seek(file_offset) + except OSError: + raise ZipImportError(f"can't read Zip file: {archive!r}", path=archive) + raw_data = fp.read(data_size) + if len(raw_data) != data_size: + raise OSError("zipimport: can't read data") + + if compress == 0: + # data is not compressed + return raw_data + + # Decompress with zlib + try: + decompress = _get_decompress_func() + except Exception: + raise ZipImportError("can't decompress data; zlib not available") + return decompress(raw_data, -15) + + +# Lenient date/time comparison function. The precision of the mtime +# in the archive is lower than the mtime stored in a .pyc: we +# must allow a difference of at most one second. +def _eq_mtime(t1, t2): + # dostime only stores even seconds, so be lenient + return abs(t1 - t2) <= 1 + + +# Given the contents of a .py[co] file, unmarshal the data +# and return the code object. Raises ImportError it the magic word doesn't +# match, or if the recorded .py[co] metadata does not match the source. +def _unmarshal_code(self, pathname, fullpath, fullname, data): + exc_details = { + 'name': fullname, + 'path': fullpath, + } + + flags = _bootstrap_external._classify_pyc(data, fullname, exc_details) + + hash_based = flags & 0b1 != 0 + if hash_based: + check_source = flags & 0b10 != 0 + if (_imp.check_hash_based_pycs != 'never' and + (check_source or _imp.check_hash_based_pycs == 'always')): + source_bytes = _get_pyc_source(self, fullpath) + if source_bytes is not None: + source_hash = _imp.source_hash( + _imp.pyc_magic_number_token, + source_bytes, + ) + + _bootstrap_external._validate_hash_pyc( + data, source_hash, fullname, exc_details) + else: + source_mtime, source_size = \ + _get_mtime_and_size_of_source(self, fullpath) + + if source_mtime: + # We don't use _bootstrap_external._validate_timestamp_pyc + # to allow for a more lenient timestamp check. + if (not _eq_mtime(_unpack_uint32(data[8:12]), source_mtime) or + _unpack_uint32(data[12:16]) != source_size): + _bootstrap._verbose_message( + f'bytecode is stale for {fullname!r}') + return None + + code = marshal.loads(data[16:]) + if not isinstance(code, _code_type): + raise TypeError(f'compiled module {pathname!r} is not a code object') + return code + +_code_type = type(_unmarshal_code.__code__) + + +# Replace any occurrences of '\r\n?' in the input string with '\n'. +# This converts DOS and Mac line endings to Unix line endings. +def _normalize_line_endings(source): + source = source.replace(b'\r\n', b'\n') + source = source.replace(b'\r', b'\n') + return source + +# Given a string buffer containing Python source code, compile it +# and return a code object. +def _compile_source(pathname, source): + source = _normalize_line_endings(source) + return compile(source, pathname, 'exec', dont_inherit=True) + +# Convert the date/time values found in the Zip archive to a value +# that's compatible with the time stamp stored in .pyc files. +def _parse_dostime(d, t): + return time.mktime(( + (d >> 9) + 1980, # bits 9..15: year + (d >> 5) & 0xF, # bits 5..8: month + d & 0x1F, # bits 0..4: day + t >> 11, # bits 11..15: hours + (t >> 5) & 0x3F, # bits 8..10: minutes + (t & 0x1F) * 2, # bits 0..7: seconds / 2 + -1, -1, -1)) + +# Given a path to a .pyc file in the archive, return the +# modification time of the matching .py file and its size, +# or (0, 0) if no source is available. +def _get_mtime_and_size_of_source(self, path): + try: + # strip 'c' or 'o' from *.py[co] + assert path[-1:] in ('c', 'o') + path = path[:-1] + toc_entry = self._get_files()[path] + # fetch the time stamp of the .py file for comparison + # with an embedded pyc time stamp + time = toc_entry[5] + date = toc_entry[6] + uncompressed_size = toc_entry[3] + return _parse_dostime(date, time), uncompressed_size + except (KeyError, IndexError, TypeError): + return 0, 0 + + +# Given a path to a .pyc file in the archive, return the +# contents of the matching .py file, or None if no source +# is available. +def _get_pyc_source(self, path): + # strip 'c' or 'o' from *.py[co] + assert path[-1:] in ('c', 'o') + path = path[:-1] + + try: + toc_entry = self._get_files()[path] + except KeyError: + return None + else: + return _get_data(self.archive, toc_entry) + + +# Get the code object associated with the module specified by +# 'fullname'. +def _get_module_code(self, fullname): + path = _get_module_path(self, fullname) + import_error = None + for suffix, isbytecode, ispackage in _zip_searchorder: + fullpath = path + suffix + _bootstrap._verbose_message('trying {}{}{}', self.archive, path_sep, fullpath, verbosity=2) + try: + toc_entry = self._get_files()[fullpath] + except KeyError: + pass + else: + modpath = toc_entry[0] + data = _get_data(self.archive, toc_entry) + code = None + if isbytecode: + try: + code = _unmarshal_code(self, modpath, fullpath, fullname, data) + except ImportError as exc: + import_error = exc + else: + code = _compile_source(modpath, data) + if code is None: + # bad magic number or non-matching mtime + # in byte code, try next + continue + modpath = toc_entry[0] + return code, ispackage, modpath + else: + if import_error: + msg = f"module load failed: {import_error}" + raise ZipImportError(msg, name=fullname) from import_error + else: + raise ZipImportError(f"can't find module {fullname!r}", name=fullname) From 25866e6453adf32c7001d8debee5b17584d2fe4b Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 01:03:08 +0700 Subject: [PATCH 16/84] zlib: default Compress.flush() to Z_FINISH; route zip imports through path hooks Two fixes that unblock importing modules out of a zip archive on sys.path. zlib.Compress.flush() defaulted to Z_SYNC_FLUSH, but CPython defaults the mode to Z_FINISH. The common compressobj().compress(x) + flush() idiom has to emit a complete deflate stream (final block) or a one-shot decompressor reads back a truncated stream and raises 'unexpected EOF'. zipfile stores compressed members through that idiom and zipimport inflates them with raw deflate, so every compressed-zip import was failing. Add sys.meta_path so import_helper's save/restore around each test stops raising AttributeError, register zipimport.zipimporter on sys.path_hooks ahead of the FileFinder hook, and have the Go path finder consult sys.path_hooks for non-directory sys.path entries: it builds the importer, asks it for the spec, and loads the module via module_from_spec + exec_module, mirroring _bootstrap._load_unlocked. --- imp/pathfinder.go | 149 ++++++++++++++++++++++++++++++++++ junk95142.zip | Bin 0 -> 6331494 bytes module/sys/sys.go | 10 +++ module/zlib/module.go | 9 +- stdlib/importlib/machinery.py | 10 +++ ziptestmodule | 1 + 6 files changed, 178 insertions(+), 1 deletion(-) create mode 100644 junk95142.zip create mode 100644 ziptestmodule diff --git a/imp/pathfinder.go b/imp/pathfinder.go index a94e04a1..caa186f3 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -130,6 +130,23 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er if dir == "" { dir = "." } + // A sys.path entry that is not a directory (a zip archive, or a + // path that points inside one) is handled by a custom importer + // registered on sys.path_hooks, exactly as CPython's PathFinder + // routes such entries through zipimport.zipimporter. Only consult + // the hooks for non-directories so the directory scan below stays + // the fast path for the common case. + // + // CPython: Lib/importlib/_bootstrap_external.py:1236 _path_importer_cache + if !isDir(dir) { + if mod, handled, herr := tryPathHook(exec, entry, name); herr != nil { + return nil, herr + } else if handled { + bindOnParent(parent, tail, mod) + return mod, nil + } + continue + } // Package case: //__init__.py. // CPython: Lib/importlib/_bootstrap_external.py:1378 cache_module in cache pkgDir := filepath.Join(dir, tail) @@ -165,6 +182,138 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er return nil, fmt.Errorf("%w: %s", errFinderMiss, name) } +// tryPathHook consults sys.path_hooks for a custom importer able to load +// modules out of entry (zipimport.zipimporter for a .zip archive), asks +// that importer for name's spec, and loads the module from it. +// +// handled is false when no hook claims entry, or when the importer +// claims entry but has no spec for name, so FindModule keeps scanning the +// remaining path entries. herr carries a real loader failure (compile or +// exec error) that must propagate. +// +// CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder._get_spec +// CPython: Lib/importlib/_bootstrap.py:921 _load_unlocked +func tryPathHook(exec Executor, entry, name string) (mod *objects.Module, handled bool, herr error) { + importer, ok := pathHookImporter(entry) + if !ok { + return nil, false, nil + } + findSpec, err := objects.GetAttr(importer, objects.NewStr("find_spec")) + if err != nil { + return nil, false, nil + } + spec, err := objects.Call(findSpec, objects.NewTuple([]objects.Object{objects.NewStr(name)}), nil) + if err != nil { + return nil, true, err + } + if spec == nil || objects.IsNone(spec) { + // The archive exists but does not contain name: a miss, not an + // error. CPython's PathFinder moves on to the next path entry. + return nil, false, nil + } + m, lerr := loadFromSpec(exec, name, spec) + if lerr != nil { + return nil, true, lerr + } + return m, true, nil +} + +// pathHookImporter returns the importer object responsible for entry, +// consulting sys.path_importer_cache first and then sys.path_hooks. A +// hook that raises (ImportError) declines entry, so the next hook is +// tried; when none claim it the result is cached as None and ok is false. +// +// CPython: Lib/importlib/_bootstrap_external.py:1236 PathFinder._path_importer_cache +func pathHookImporter(entry string) (objects.Object, bool) { + sysMod, ok := GetModule("sys") + if !ok { + return nil, false + } + key := objects.NewStr(entry) + cacheObj, _ := sysMod.Dict().GetItem(objects.NewStr("path_importer_cache")) + cache, _ := cacheObj.(*objects.Dict) + if cache != nil { + if v, err := cache.GetItem(key); err == nil && v != nil { + if objects.IsNone(v) { + return nil, false + } + return v, true + } + } + hooksObj, _ := sysMod.Dict().GetItem(objects.NewStr("path_hooks")) + hooks, _ := hooksObj.(*objects.List) + if hooks == nil { + return nil, false + } + for i := 0; i < hooks.Len(); i++ { + importer, err := objects.Call(hooks.Item(i), objects.NewTuple([]objects.Object{key}), nil) + if err != nil { + // ImportError from a hook means "I do not handle this entry". + continue + } + if importer != nil && !objects.IsNone(importer) { + if cache != nil { + _ = cache.SetItem(key, importer) + } + return importer, true + } + } + if cache != nil { + _ = cache.SetItem(key, objects.None()) + } + return nil, false +} + +// loadFromSpec builds a module from spec via importlib.util.module_from_spec, +// registers it in sys.modules, and runs spec.loader.exec_module, mirroring +// the body of _bootstrap._load_unlocked. gopy cannot call _load itself +// because that path enters the import lock machinery, which needs the +// _weakref injection CPython performs in _setup and gopy does not run. +// +// CPython: Lib/importlib/_bootstrap.py:921 _load_unlocked +func loadFromSpec(exec Executor, name string, spec objects.Object) (*objects.Module, error) { + util, ok := GetModule("importlib.util") + if !ok { + util, ok = ensureImportlibUtil(exec) + if !ok { + return nil, fmt.Errorf("imp: loadFromSpec %q: importlib.util unavailable", name) + } + } + mfs, err := util.Dict().GetItem(objects.NewStr("module_from_spec")) + if err != nil { + return nil, fmt.Errorf("imp: loadFromSpec %q: module_from_spec missing: %w", name, err) + } + modObj, err := objects.Call(mfs, objects.NewTuple([]objects.Object{spec}), nil) + if err != nil { + return nil, fmt.Errorf("imp: loadFromSpec %q: module_from_spec: %w", name, err) + } + module, ok := modObj.(*objects.Module) + if !ok { + return nil, fmt.Errorf("imp: loadFromSpec %q: module_from_spec returned %T", name, modObj) + } + AddModule(name, module) + loader, err := objects.GetAttr(spec, objects.NewStr("loader")) + if err != nil { + RemoveModule(name) + return nil, fmt.Errorf("imp: loadFromSpec %q: spec.loader: %w", name, err) + } + execMod, err := objects.GetAttr(loader, objects.NewStr("exec_module")) + if err != nil { + RemoveModule(name) + return nil, fmt.Errorf("imp: loadFromSpec %q: loader.exec_module: %w", name, err) + } + if _, err := objects.Call(execMod, objects.NewTuple([]objects.Object{module}), nil); err != nil { + RemoveModule(name) + return nil, fmt.Errorf("imp: loadFromSpec %q: exec_module: %w", name, err) + } + // exec_module may reassign sys.modules[name]; re-read it the way + // CPython's _load_unlocked returns sys.modules[spec.name]. + if final, ok := GetModule(name); ok { + return final, nil + } + return module, nil +} + // bindOnParent installs child as an attribute on the parent package's // module dict. 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CPython seeds it with + // BuiltinImporter, FrozenImporter and PathFinder; gopy resolves those + // three Go-side, so the list starts empty. It still has to exist as a + // real list: import_helper saves and restores it around every test, + // and user code is free to append custom finders. + // + // CPython: Python/pylifecycle.c init_importlib (sys.meta_path) + if err := setItem(d, "meta_path", objects.NewList(nil)); err != nil { + return nil, err + } if err := setItem(d, "path_importer_cache", objects.NewDict()); err != nil { return nil, err } diff --git a/module/zlib/module.go b/module/zlib/module.go index 56ccc663..cd8e3a34 100644 --- a/module/zlib/module.go +++ b/module/zlib/module.go @@ -151,7 +151,14 @@ func compressObjFlush(args []objects.Object, _ map[string]objects.Object) (objec return nil, fmt.Errorf("ValueError: compressor has already been flushed") } - mode := zSyncFlush + // flush()'s mode argument defaults to Z_FINISH, not Z_SYNC_FLUSH: + // the common `compressobj().compress(x) + flush()` idiom must emit a + // complete stream (final deflate block) so a one-shot decompressor can + // read it back. zipfile relies on this when it stores compressed + // members, and zipimport then decompresses them with raw inflate. + // + // CPython: Modules/zlibmodule.c:478 zlib_Compress_flush_impl (mode=Z_FINISH) + mode := zFinish if len(args) >= 2 { m, err := intFromObj(args[1]) if err != nil { diff --git a/stdlib/importlib/machinery.py b/stdlib/importlib/machinery.py index e041bfb5..ce460f75 100644 --- a/stdlib/importlib/machinery.py +++ b/stdlib/importlib/machinery.py @@ -155,6 +155,16 @@ def _install_path_hooks(): import sys if getattr(sys, '_gopy_file_finder_installed', False): return + # CPython orders the path hooks zipimport.zipimporter first, then the + # FileFinder hook, so a sys.path entry pointing at a zip archive is + # claimed by zipimport before the directory finder rejects it. + # + # CPython: Lib/importlib/_bootstrap_external.py:1648 _install (path_hooks) + try: + import zipimport + sys.path_hooks.append(zipimport.zipimporter) + except ImportError: + pass _loader_details = (SourceFileLoader, SOURCE_SUFFIXES) sys.path_hooks.append(FileFinder.path_hook(_loader_details)) sys._gopy_file_finder_installed = True diff --git a/ziptestmodule b/ziptestmodule new file mode 100644 index 00000000..fb2922d3 --- /dev/null +++ b/ziptestmodule @@ -0,0 +1 @@ +aaaaaaaaaaaaaaaaaaaaaa \ No newline at end of file From f5f674d4c0980873f7c530c318e4be295a42f2f9 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 01:26:47 +0700 Subject: [PATCH 17/84] import: namespace portion accumulation + sourceless .pyc directory loads PEP 420 namespace packages were dropping portions found in zip path-hook importers, so a package split across two archives ended up with a __path__ of length 2 instead of the merged single entry. PathFinder now accumulates namespace portions from path-hook specs the same way it does for plain directories. A real-filesystem namespace portion that only holds .pyc files (no .py) was also invisible to the directory scan, so submodules under it raised ModuleNotFoundError. Added __init__.pyc and .pyc handling that loads the marshalled code directly. importlib.util.module_from_spec was a divergent stub that only set __file__ when origin was not None; namespace specs left it unset and mod.__file__ raised AttributeError. Re-export _bootstrap.module_from_spec so namespace modules get __file__ = None like CPython. zlib.crc32/adler32 now accept bytearray. Drops two test_zipimport scratch artifacts that were committed by mistake. --- .gitignore | 7 ++ imp/pathfinder.go | 213 +++++++++++++++++++++++++++++++++++---- junk95142.zip | Bin 6331494 -> 0 bytes module/zlib/module.go | 2 + stdlib/importlib/util.py | 22 +--- ziptestmodule | 1 - 6 files changed, 203 insertions(+), 42 deletions(-) delete mode 100644 junk95142.zip delete mode 100644 ziptestmodule diff --git a/.gitignore b/.gitignore index 7ebd0ef6..dd8e3a50 100644 --- a/.gitignore +++ b/.gitignore @@ -31,3 +31,10 @@ TECHNICAL_BRIEF.md /compare-baseline Tools/bytecodes_gen/bytecodes_gen /bytecodes_gen + +# test_zipimport scratch artifacts +junk*.zip +junk*/ + +ziptestmodule +ziptestmodule.py diff --git a/imp/pathfinder.go b/imp/pathfinder.go index caa186f3..e365a5fe 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -25,6 +25,7 @@ import ( "strings" "sync" + "github.com/tamnd/gopy/marshal" "github.com/tamnd/gopy/objects" ) @@ -139,13 +140,30 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // // CPython: Lib/importlib/_bootstrap_external.py:1236 _path_importer_cache if !isDir(dir) { - if mod, handled, herr := tryPathHook(exec, entry, name); herr != nil { + spec, handled, herr := pathHookSpec(exec, entry, name) + if herr != nil { return nil, herr - } else if handled { - bindOnParent(parent, tail, mod) - return mod, nil } - continue + if !handled { + continue + } + // A namespace spec from the importer (loader None, search + // locations set) is a PEP 420 portion: collect it and keep + // scanning, exactly as CPython's PathFinder extends + // namespace_path instead of returning. A spec with a real + // loader is a concrete module, so load and return it. + // + // CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder._get_spec + if portions, isNS := namespacePortionsOf(spec); isNS { + namespacePortions = append(namespacePortions, portions...) + continue + } + mod, lerr := loadFromSpec(exec, name, spec) + if lerr != nil { + return nil, lerr + } + bindOnParent(parent, tail, mod) + return mod, nil } // Package case: //__init__.py. // CPython: Lib/importlib/_bootstrap_external.py:1378 cache_module in cache @@ -159,6 +177,19 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er bindOnParent(parent, tail, mod) return mod, nil } + // Sourceless package: //__init__.pyc. CPython's + // FileFinder walks its loader suffixes for __init__, so the + // bytecode loader is tried after the source loader. + // CPython: Lib/importlib/_bootstrap_external.py:1424 __init__ suffix loop + pkgInitPyc := filepath.Join(pkgDir, "__init__.pyc") + if isFile(pkgInitPyc) { + mod, err := loadAsPackageBytecode(exec, pkgInitPyc, pkgDir, name) + if err != nil { + return nil, err + } + bindOnParent(parent, tail, mod) + return mod, nil + } // Module case: /.py. // CPython: Lib/importlib/_bootstrap_external.py:1391 suffix loop modFile := filepath.Join(dir, tail+".py") @@ -170,6 +201,18 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er bindOnParent(parent, tail, mod) return mod, nil } + // Sourceless module: /.pyc, loaded by the bytecode + // loader once the source suffix has missed. + // CPython: Lib/importlib/_bootstrap_external.py:1215 SourcelessFileLoader + modPyc := filepath.Join(dir, tail+".pyc") + if isFile(modPyc) { + mod, err := loadAsModuleBytecode(exec, modPyc, name, parent) + if err != nil { + return nil, err + } + bindOnParent(parent, tail, mod) + return mod, nil + } if isDir(pkgDir) { namespacePortions = append(namespacePortions, pkgDir) } @@ -182,18 +225,19 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er return nil, fmt.Errorf("%w: %s", errFinderMiss, name) } -// tryPathHook consults sys.path_hooks for a custom importer able to load -// modules out of entry (zipimport.zipimporter for a .zip archive), asks -// that importer for name's spec, and loads the module from it. +// pathHookSpec consults sys.path_hooks for a custom importer able to load +// modules out of entry (zipimport.zipimporter for a .zip archive) and asks +// that importer for name's spec. // -// handled is false when no hook claims entry, or when the importer -// claims entry but has no spec for name, so FindModule keeps scanning the -// remaining path entries. herr carries a real loader failure (compile or -// exec error) that must propagate. +// handled is false when no hook claims entry, or when the importer claims +// entry but has no spec for name, so FindModule keeps scanning the +// remaining path entries. herr carries a find_spec failure that must +// propagate. The spec is returned unloaded so FindModule can tell a +// concrete module apart from a PEP 420 namespace portion. // // CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder._get_spec -// CPython: Lib/importlib/_bootstrap.py:921 _load_unlocked -func tryPathHook(exec Executor, entry, name string) (mod *objects.Module, handled bool, herr error) { +func pathHookSpec(exec Executor, entry, name string) (spec objects.Object, handled bool, herr error) { + _ = exec importer, ok := pathHookImporter(entry) if !ok { return nil, false, nil @@ -202,20 +246,49 @@ func tryPathHook(exec Executor, entry, name string) (mod *objects.Module, handle if err != nil { return nil, false, nil } - spec, err := objects.Call(findSpec, objects.NewTuple([]objects.Object{objects.NewStr(name)}), nil) + s, err := objects.Call(findSpec, objects.NewTuple([]objects.Object{objects.NewStr(name)}), nil) if err != nil { return nil, true, err } - if spec == nil || objects.IsNone(spec) { + if s == nil || objects.IsNone(s) { // The archive exists but does not contain name: a miss, not an // error. CPython's PathFinder moves on to the next path entry. return nil, false, nil } - m, lerr := loadFromSpec(exec, name, spec) - if lerr != nil { - return nil, true, lerr + return s, true, nil +} + +// namespacePortionsOf reports whether spec is a PEP 420 namespace spec +// (loader None) and, if so, returns its submodule_search_locations as a +// slice of strings. A spec with a real loader is a concrete module and +// returns isNS false. +// +// CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder._get_spec +// (spec.submodule_search_locations / namespace_path extension) +func namespacePortionsOf(spec objects.Object) (portions []string, isNS bool) { + loader, err := objects.GetAttr(spec, objects.NewStr("loader")) + if err != nil || !objects.IsNone(loader) { + return nil, false + } + ssl, err := objects.GetAttr(spec, objects.NewStr("submodule_search_locations")) + if err != nil || ssl == nil || objects.IsNone(ssl) { + return nil, false } - return m, true, nil + switch v := ssl.(type) { + case *objects.List: + for i := 0; i < v.Len(); i++ { + if s, ok := v.Item(i).(*objects.Unicode); ok { + portions = append(portions, s.Value()) + } + } + case *objects.Tuple: + for i := 0; i < v.Len(); i++ { + if s, ok := v.Item(i).(*objects.Unicode); ok { + portions = append(portions, s.Value()) + } + } + } + return portions, true } // pathHookImporter returns the importer object responsible for entry, @@ -297,6 +370,18 @@ func loadFromSpec(exec Executor, name string, spec objects.Object) (*objects.Mod RemoveModule(name) return nil, fmt.Errorf("imp: loadFromSpec %q: spec.loader: %w", name, err) } + // A namespace-package spec carries loader None: module_from_spec has + // already populated __path__ from submodule_search_locations and there + // is no body to run, exactly as _load_unlocked skips exec_module when + // the loader is None. + // + // CPython: Lib/importlib/_bootstrap.py:945 _load_unlocked (loader is None) + if objects.IsNone(loader) { + if final, ok := GetModule(name); ok { + return final, nil + } + return module, nil + } execMod, err := objects.GetAttr(loader, objects.NewStr("exec_module")) if err != nil { RemoveModule(name) @@ -440,6 +525,94 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam return mod, nil } +// loadAsPackageBytecode is loadAsPackage for a sourceless package: the +// code object comes from /__init__.pyc instead of compiling +// __init__.py. __path__ is set before the body runs so a package whose +// __init__ does `from .submod import x` can resolve the parent's +// __path__. +// +// CPython: Lib/importlib/_bootstrap_external.py:1215 SourcelessFileLoader +func loadAsPackageBytecode(exec Executor, initFile, pkgDir, name string) (*objects.Module, error) { + code, err := readPycCode(initFile) + if err != nil { + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: %w", name, err) + } + mod, exists := GetModule(name) + if !exists { + mod = objects.NewModule(name) + } + d := mod.Dict() + if err := d.SetItem(objects.NewStr("__file__"), objects.NewStr(initFile)); err != nil { + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: __file__: %w", name, err) + } + if err := d.SetItem(objects.NewStr("__path__"), + objects.NewList([]objects.Object{objects.NewStr(pkgDir)})); err != nil { + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: __path__: %w", name, err) + } + if err := d.SetItem(objects.NewStr("__package__"), objects.NewStr(name)); err != nil { + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: __package__: %w", name, err) + } + AddModule(name, mod) + if _, err := exec.ExecCode(code, mod); err != nil { + RemoveModule(name) + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: exec: %w", name, err) + } + attachSpecAttrs(exec, mod, name, initFile, []string{pkgDir}) + if final, ok := GetModule(name); ok { + return final, nil + } + return mod, nil +} + +// loadAsModuleBytecode is loadAsModule for a sourceless module: the code +// object comes from /.pyc instead of compiling .py. +// +// CPython: Lib/importlib/_bootstrap_external.py:1215 SourcelessFileLoader +func loadAsModuleBytecode(exec Executor, file, name, parent string) (*objects.Module, error) { + code, err := readPycCode(file) + if err != nil { + return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: %w", name, err) + } + mod, exists := GetModule(name) + if !exists { + mod = objects.NewModule(name) + } + d := mod.Dict() + if err := d.SetItem(objects.NewStr("__file__"), objects.NewStr(file)); err != nil { + return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: __file__: %w", name, err) + } + if err := d.SetItem(objects.NewStr("__package__"), objects.NewStr(parent)); err != nil { + return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: __package__: %w", name, err) + } + AddModule(name, mod) + if _, err := exec.ExecCode(code, mod); err != nil { + RemoveModule(name) + return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: exec: %w", name, err) + } + attachSpecAttrs(exec, mod, name, file, nil) + if final, ok := GetModule(name); ok { + return final, nil + } + return mod, nil +} + +// readPycCode opens a .pyc file and returns its embedded code object, +// validating the magic-number header along the way. +// +// CPython: Lib/importlib/_bootstrap_external.py:1215 SourcelessFileLoader.get_code +func readPycCode(file string) (*objects.Code, error) { + f, err := os.Open(file) //nolint:gosec // file is filepath.Join of a trusted PathFinder.Paths entry. + if err != nil { + return nil, err + } + defer f.Close() + code, _, err := marshal.ReadPyc(f) + if err != nil { + return nil, err + } + return code, nil +} + // loadAsNamespace builds a PEP 420 namespace package: a module with no // __file__, a __path__ spanning every contributing directory, and a // namespace __spec__ (loader None, origin None). 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zdDBJ+5FkK+009C72oNAZfB=E$1)e_tTA>B}Cf|?Imk$F85FkK+009C72oNAZfB=Ej zCRfO&F`#u{&pOek4+9AhAV7cs0RjXF5FkK+0D-UP*N1QnxQsrg+6Vyx1PBlyK!5-N z0t5&UAP~Jko%`QRe} diff --git a/module/zlib/module.go b/module/zlib/module.go index cd8e3a34..91c70806 100644 --- a/module/zlib/module.go +++ b/module/zlib/module.go @@ -766,6 +766,8 @@ func toBytes(o objects.Object) ([]byte, error) { switch v := o.(type) { case *objects.Bytes: return v.Bytes(), nil + case *objects.ByteArray: + return v.Bytes(), nil case *objects.Unicode: s, err := objects.Str(o) if err != nil { diff --git a/stdlib/importlib/util.py b/stdlib/importlib/util.py index d4d249b5..0808ba2a 100644 --- a/stdlib/importlib/util.py +++ b/stdlib/importlib/util.py @@ -15,6 +15,7 @@ import sys import types +from importlib._bootstrap import module_from_spec from importlib._bootstrap_external import ( MAGIC_NUMBER, cache_from_source, @@ -152,27 +153,6 @@ def _find_spec_from_path(name, path=None): return spec -def module_from_spec(spec): - """Create a new module based on spec and spec.loader.create_module. - - CPython: Lib/importlib/_bootstrap.py:571 module_from_spec - """ - import types - module = None - if hasattr(spec.loader, 'create_module'): - module = spec.loader.create_module(spec) - if module is None: - module = types.ModuleType(spec.name) - module.__loader__ = spec.loader - module.__spec__ = spec - module.__package__ = spec.name.rpartition('.')[0] - if spec.origin is not None: - module.__file__ = spec.origin - if spec.submodule_search_locations is not None: - module.__path__ = list(spec.submodule_search_locations) - return module - - def spec_from_loader(name, loader, *, origin=None, is_package=None): """Return a ModuleSpec based on a loader. diff --git a/ziptestmodule b/ziptestmodule deleted file mode 100644 index fb2922d3..00000000 --- a/ziptestmodule +++ /dev/null @@ -1 +0,0 @@ -aaaaaaaaaaaaaaaaaaaaaa \ No newline at end of file From 696a0e871d80a516a732f8c1401e10b4688a0768 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 01:35:31 +0700 Subject: [PATCH 18/84] sys: report statically-linked modules in builtin_module_names; ImportError.msg gopy compiles every extension module into the binary, so they behave exactly like statically-linked builtins: they are found before the path finder and cannot be shadowed by a module of the same name on sys.path. sys.builtin_module_names only listed builtins and sys, which left the importlib builtin/extension finder tests with no usable module name and made test_zipimport.testAFakeZlib run (and fail) instead of skipping the way it does on a statically-linked CPython build. Build the tuple from the inittab snapshot, minus the few pure-Python modules gopy keeps there as an import shortcut so 'os' in sys.builtin_module_names stays False. ImportError now exposes the msg member CPython sets from the single positional argument, so exc.msg (read by zipimport's bad-magic test and others) works. --- errors/exc_import_init.go | 17 ++++++++++++---- module/sys/sys.go | 42 +++++++++++++++++++++++++++++++-------- 2 files changed, 47 insertions(+), 12 deletions(-) diff --git a/errors/exc_import_init.go b/errors/exc_import_init.go index 80681d8a..c3e59026 100644 --- a/errors/exc_import_init.go +++ b/errors/exc_import_init.go @@ -22,14 +22,15 @@ func init() { objects.NewMethodDescr(PyExc_ImportError, "__init__", importErrorInit). WithKwParams("ImportError", importErrorKwlist, len(importErrorKwlist))) - // name / path / name_from are Py_T_OBJECT members on + // msg / name / path / name_from are Py_T_OBJECT members on // PyImportErrorObject: reading a member that was never set yields // None rather than raising AttributeError, and writing stores the // value. runpy/importlib both read e.name on a caught ImportError, - // so the attribute must always exist. + // so the attribute must always exist. msg is set from the single + // positional arg by ImportError_init rather than via a keyword. // - // CPython: Objects/exceptions.c:1893 ImportError_members - for _, name := range importErrorKwlist { + // CPython: Objects/exceptions.c:1932 ImportError_members + for _, name := range append([]string{"msg"}, importErrorKwlist...) { field := name objects.SetTypeDescr(PyExc_ImportError, field, objects.NewGetSetDescr(field, func(o objects.Object) (objects.Object, error) { return importErrorMember(o, field) }, @@ -97,6 +98,14 @@ func importErrorInit(args []objects.Object, kwargs map[string]objects.Object) (o return objects.None(), nil } + // msg is set from the lone positional argument: PyTuple_GET_SIZE(args) + // counts the exception args tuple, which here is args[1:]. + // + // CPython: Objects/exceptions.c:1836 ImportError_init (self->msg) + if len(args) == 2 { + _ = e.EnsureAttrDict().SetItem(objects.NewStr("msg"), args[1]) + } + if len(kwargs) > 0 { // PyArg_ParseTupleAndKeywords("|$OOO") with an empty positional // tuple: the surplus check counts every keyword against the three diff --git a/module/sys/sys.go b/module/sys/sys.go index a2d6c010..26e70c76 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -16,9 +16,11 @@ package sys import ( + "sort" "strconv" "github.com/tamnd/gopy/build" + "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/objects" ) @@ -269,17 +271,41 @@ func implementation() *objects.Namespace { return n } -// builtinModuleNames returns the tuple of module names that are -// compiled into the interpreter. Until 1623 lands the import system -// the list contains just the modules gopy initializes statically -// (builtins, sys). The slice grows as 1651 lands more modules. +// notStaticallyLinked lists modules that gopy keeps in its inittab as a +// Go-side import shortcut but that CPython ships as pure-Python stdlib +// (.py files on sys.path), so they never appear in CPython's +// PyImport_Inittab. They are filtered out of builtin_module_names so +// that, e.g., 'os' in sys.builtin_module_names stays False as on a +// normal CPython build. +var notStaticallyLinked = map[string]bool{ + "os": true, + "warnings": true, + "dataclasses": true, + "difflib": true, + "fnmatch": true, +} + +// builtinModuleNames returns the sorted tuple of module names compiled +// into the interpreter. CPython builds this directly from +// PyImport_Inittab; gopy statically links every extension module into +// the binary, so the table is the inittab snapshot minus the handful of +// pure-Python modules gopy registers there only as an import shortcut. // // CPython: Python/sysmodule.c:3859 list_builtin_module_names func builtinModuleNames() *objects.Tuple { - return objects.NewTuple([]objects.Object{ - objects.NewStr("builtins"), - objects.NewStr("sys"), - }) + names := make([]string, 0, 64) + for _, e := range imp.InittabSnapshot() { + if notStaticallyLinked[e.Name] { + continue + } + names = append(names, e.Name) + } + sort.Strings(names) + items := make([]objects.Object, len(names)) + for i, n := range names { + items[i] = objects.NewStr(n) + } + return objects.NewTuple(items) } // hashInfo is sys.hash_info as a SimpleNamespace. The field order From cd01ffbd72c3939442893dd37ae3ef965c936bb2 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 01:46:32 +0700 Subject: [PATCH 19/84] testcapi: port _testcapi.config_get over a PyConfig_Get spec table --- initconfig/config_get.go | 163 ++++++++++++++++++++++++++++++++++ module/_testcapi/config.go | 173 +++++++++++++++++++++++++++++++++++++ module/_testcapi/module.go | 3 + 3 files changed, 339 insertions(+) create mode 100644 initconfig/config_get.go create mode 100644 module/_testcapi/config.go diff --git a/initconfig/config_get.go b/initconfig/config_get.go new file mode 100644 index 00000000..be0201f9 --- /dev/null +++ b/initconfig/config_get.go @@ -0,0 +1,163 @@ +package initconfig + +import "sort" + +// ConfigMemberType mirrors the PyConfigMemberType enum: the storage +// class of a PyConfig field, which decides how config_get turns the raw +// member into a Python object. +// +// CPython: Python/initconfig.c:60 PyConfigMemberType +type ConfigMemberType int + +const ( + ConfigMemberInt ConfigMemberType = iota + ConfigMemberUint + ConfigMemberBool + ConfigMemberULong + ConfigMemberWStr + ConfigMemberWStrOpt + ConfigMemberWStrList +) + +// configSpec is one row of PYCONFIG_SPEC: the option name, its member +// type, the sys attribute config_get delegates to when use_sys is set +// (empty for NO_SYS / SYS_FLAG rows), and a reader that pulls the raw +// member out of a PyConfig. gopy only lists the rows whose members the +// v0.x PyConfig subset actually models; the scoped-out fields documented +// on PyConfig (tracemalloc, dump_refs, perf_profiling, ...) are absent +// here exactly as they are absent from the struct, so config_get reports +// them as unknown names until their subsystems land. +// +// CPython: Python/initconfig.c:105 PYCONFIG_SPEC +type configSpec struct { + name string + typ ConfigMemberType + sysAttr string + get func(c *PyConfig) any +} + +// pyconfigSpec is the gopy port of PYCONFIG_SPEC. Rows preserve the +// CPython option names, member types, and SYS_ATTR delegations. +// +// CPython: Python/initconfig.c:105 PYCONFIG_SPEC +var pyconfigSpec = []configSpec{ + // --- Public options --- + {"argv", ConfigMemberWStrList, "argv", func(c *PyConfig) any { return c.Argv }}, + {"base_exec_prefix", ConfigMemberWStrOpt, "base_exec_prefix", func(c *PyConfig) any { return c.BaseExecPrefix }}, + {"base_executable", ConfigMemberWStrOpt, "_base_executable", func(c *PyConfig) any { return c.BaseExecutable }}, + {"base_prefix", ConfigMemberWStrOpt, "base_prefix", func(c *PyConfig) any { return c.BasePrefix }}, + {"bytes_warning", ConfigMemberUint, "", func(c *PyConfig) any { return c.BytesWarning }}, + {"exec_prefix", ConfigMemberWStrOpt, "exec_prefix", func(c *PyConfig) any { return c.ExecPrefix }}, + {"executable", ConfigMemberWStrOpt, "executable", func(c *PyConfig) any { return c.Executable }}, + {"inspect", ConfigMemberBool, "", func(c *PyConfig) any { return c.Inspect }}, + {"int_max_str_digits", ConfigMemberUint, "", func(c *PyConfig) any { return c.IntMaxStrDigits }}, + {"interactive", ConfigMemberBool, "", func(c *PyConfig) any { return c.Interactive }}, + {"module_search_paths", ConfigMemberWStrList, "path", func(c *PyConfig) any { return c.ModuleSearchPaths }}, + {"optimization_level", ConfigMemberUint, "", func(c *PyConfig) any { return c.OptimizationLevel }}, + {"parser_debug", ConfigMemberBool, "", func(c *PyConfig) any { return c.ParserDebug }}, + {"platlibdir", ConfigMemberWStr, "platlibdir", func(c *PyConfig) any { return c.Platlibdir }}, + {"prefix", ConfigMemberWStrOpt, "prefix", func(c *PyConfig) any { return c.Prefix }}, + {"pycache_prefix", ConfigMemberWStrOpt, "pycache_prefix", func(c *PyConfig) any { return c.PycachePrefix }}, + {"quiet", ConfigMemberBool, "", func(c *PyConfig) any { return c.Quiet }}, + {"stdlib_dir", ConfigMemberWStrOpt, "_stdlib_dir", func(c *PyConfig) any { return c.StdlibDir }}, + {"use_environment", ConfigMemberBool, "", func(c *PyConfig) any { return c.UseEnvironment }}, + {"verbose", ConfigMemberUint, "", func(c *PyConfig) any { return c.Verbose }}, + {"warnoptions", ConfigMemberWStrList, "warnoptions", func(c *PyConfig) any { return c.WarnOptions }}, + {"write_bytecode", ConfigMemberBool, "", func(c *PyConfig) any { return c.WriteBytecode }}, + {"xoptions", ConfigMemberWStrList, "_xoptions", func(c *PyConfig) any { return c.XOptions }}, + + // --- Read-only options --- + {"buffered_stdio", ConfigMemberBool, "", func(c *PyConfig) any { return c.BufferedStdio }}, + {"check_hash_pycs_mode", ConfigMemberWStr, "", func(c *PyConfig) any { return c.checkHashPycsMode }}, + {"code_debug_ranges", ConfigMemberBool, "", func(c *PyConfig) any { return c.CodeDebugRanges }}, + {"configure_c_stdio", ConfigMemberBool, "", func(c *PyConfig) any { return c.ConfigureCStdio }}, + {"dev_mode", ConfigMemberBool, "", func(c *PyConfig) any { return c.DevMode }}, + {"filesystem_encoding", ConfigMemberWStr, "", func(c *PyConfig) any { return c.FilesystemEncoding }}, + {"filesystem_errors", ConfigMemberWStr, "", func(c *PyConfig) any { return c.FilesystemErrors }}, + {"hash_seed", ConfigMemberULong, "", func(c *PyConfig) any { return c.HashSeed }}, + {"home", ConfigMemberWStrOpt, "", func(c *PyConfig) any { return c.Home }}, + {"import_time", ConfigMemberUint, "", func(c *PyConfig) any { return c.ImportTime }}, + {"install_signal_handlers", ConfigMemberBool, "", func(c *PyConfig) any { return c.InstallSignalHandlers }}, + {"isolated", ConfigMemberBool, "", func(c *PyConfig) any { return c.Isolated }}, + {"orig_argv", ConfigMemberWStrList, "orig_argv", func(c *PyConfig) any { return c.OrigArgv }}, + {"parse_argv", ConfigMemberBool, "", func(c *PyConfig) any { return c.ParseArgv }}, + {"pathconfig_warnings", ConfigMemberBool, "", func(c *PyConfig) any { return c.PathconfigWarnings }}, + {"program_name", ConfigMemberWStr, "", func(c *PyConfig) any { return c.ProgramName }}, + {"run_command", ConfigMemberWStrOpt, "", func(c *PyConfig) any { return c.RunCommand }}, + {"run_filename", ConfigMemberWStrOpt, "", func(c *PyConfig) any { return c.RunFilename }}, + {"run_module", ConfigMemberWStrOpt, "", func(c *PyConfig) any { return c.RunModule }}, + {"safe_path", ConfigMemberBool, "", func(c *PyConfig) any { return c.SafePath }}, + {"site_import", ConfigMemberBool, "", func(c *PyConfig) any { return c.SiteImport }}, + {"skip_source_first_line", ConfigMemberBool, "", func(c *PyConfig) any { return c.SkipSourceFirstLine }}, + {"stdio_encoding", ConfigMemberWStr, "", func(c *PyConfig) any { return c.StdioEncoding }}, + {"stdio_errors", ConfigMemberWStr, "", func(c *PyConfig) any { return c.StdioErrors }}, + {"use_frozen_modules", ConfigMemberBool, "", func(c *PyConfig) any { return c.UseFrozenModules }}, + {"use_hash_seed", ConfigMemberBool, "", func(c *PyConfig) any { return c.UseHashSeed }}, + {"user_site_directory", ConfigMemberBool, "", func(c *PyConfig) any { return c.UserSiteDirectory }}, + {"warn_default_encoding", ConfigMemberBool, "", func(c *PyConfig) any { return c.WarnDefaultEncoding }}, + + // --- Init-only options --- + {"_init_main", ConfigMemberBool, "", func(c *PyConfig) any { return c.InitMain }}, + {"_install_importlib", ConfigMemberBool, "", func(c *PyConfig) any { return c.InstallImportlib }}, + {"module_search_paths_set", ConfigMemberBool, "", func(c *PyConfig) any { return c.ModuleSearchPathsSet }}, + {"pythonpath_env", ConfigMemberWStrOpt, "", func(c *PyConfig) any { return c.PythonpathEnv }}, + {"sys_path_0", ConfigMemberWStrOpt, "", func(c *PyConfig) any { return c.SysPath0 }}, +} + +// configFindSpec locates the PYCONFIG_SPEC row for name. +// +// CPython: Python/initconfig.c:4360 config_find_spec +func configFindSpec(name string) *configSpec { + for i := range pyconfigSpec { + if pyconfigSpec[i].name == name { + return &pyconfigSpec[i] + } + } + return nil +} + +// ConfigMember is the raw value of a config option plus the metadata +// config_get needs to wrap it: its member type and, when the option is +// exposed through sys, the sys attribute name to read instead. +// +// CPython: Python/initconfig.c:4378 config_get +type ConfigMember struct { + Value any + Type ConfigMemberType + SysAttr string +} + +// ConfigGet looks up name in PYCONFIG_SPEC and returns its raw member +// from c. The bool reports whether the name is a known config option; +// an unknown name maps to the "unknown config option name" ValueError +// the caller raises. +// +// This is the gopy split of config_get: this half resolves the spec and +// reads the raw member (config_find_spec + config_get_spec_member); the +// _testcapi layer wraps the member into a Python object and handles the +// use_sys delegation, exactly as config_get does once it has the member. +// +// CPython: Python/initconfig.c:4458 PyConfig_Get +func (c *PyConfig) ConfigGet(name string) (ConfigMember, bool) { + spec := configFindSpec(name) + if spec == nil { + return ConfigMember{}, false + } + return ConfigMember{ + Value: spec.get(c), + Type: spec.typ, + SysAttr: spec.sysAttr, + }, true +} + +// ConfigNames returns the sorted list of every known config option name. +// +// CPython: Modules/_testcapi/config.c:74 _testcapi_config_names +func ConfigNames() []string { + names := make([]string, len(pyconfigSpec)) + for i := range pyconfigSpec { + names[i] = pyconfigSpec[i].name + } + sort.Strings(names) + return names +} diff --git a/module/_testcapi/config.go b/module/_testcapi/config.go new file mode 100644 index 00000000..5b737fc9 --- /dev/null +++ b/module/_testcapi/config.go @@ -0,0 +1,173 @@ +package testcapi + +import ( + "fmt" + "math/big" + "sync" + + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/initconfig" + "github.com/tamnd/gopy/objects" + "github.com/tamnd/gopy/state" +) + +// defaultConfig is the fallback configuration used when the lifecycle +// has not stamped a PyConfig onto the interpreter. The cmd entry point +// still resolves paths by hand rather than running initconfig end to +// end, so PyConfig_Get reads from the layered Python defaults, which +// already carry the runtime-true knobs the config tests inspect +// (code_debug_ranges on, write_bytecode on, optimization_level zero). +// +// CPython: Python/initconfig.c:1106 PyConfig_InitPythonConfig +var ( + defaultConfigOnce sync.Once + defaultConfig initconfig.PyConfig +) + +func sharedDefaultConfig() *initconfig.PyConfig { + defaultConfigOnce.Do(func() { + defaultConfig.InitPythonConfig() + }) + return &defaultConfig +} + +// activeConfig returns the *initconfig.PyConfig the lifecycle stamped on +// the main interpreter, the live configuration _Py_GetConfig hands to +// PyConfig_Get. It falls back to the layered Python defaults until the +// cmd entry point wires initconfig through to the interpreter. +// +// CPython: Python/initconfig.c:4461 PyConfig_Get (_Py_GetConfig) +func activeConfig() (*initconfig.PyConfig, error) { + interp := state.MainInterpreter() + if interp != nil { + if cfg, ok := interp.Config.(*initconfig.PyConfig); ok && cfg != nil { + return cfg, nil + } + } + return sharedDefaultConfig(), nil +} + +// configGetObject wraps a resolved config member into the Python object +// PyConfig_Get returns: ints/uints become int, bools become bool, the +// optional wide strings become None when empty, and the wide-string +// lists become tuples. SYS_ATTR members are read back from the live sys +// module instead, matching config_get's use_sys delegation. +// +// CPython: Python/initconfig.c:4378 config_get +func configGetObject(name string) (objects.Object, error) { + cfg, err := activeConfig() + if err != nil { + return nil, err + } + member, found := cfg.ConfigGet(name) + if !found { + // CPython: Python/initconfig.c:4451 config_unknown_name_error + return nil, fmt.Errorf("ValueError: unknown config option name: %s", name) + } + + // use_sys is always 1 for PyConfig_Get: a member exposed through sys + // reads the live sys attribute so command-line and runtime overrides + // are visible. + // + // CPython: Python/initconfig.c:4382 config_get (spec->sys.attr) + if member.SysAttr != "" { + return sysRequiredAttr(member.SysAttr) + } + + switch member.Type { + case initconfig.ConfigMemberInt, initconfig.ConfigMemberUint: + return objects.NewInt(int64(member.Value.(int))), nil + case initconfig.ConfigMemberBool: + return objects.NewBool(member.Value.(int) != 0), nil + case initconfig.ConfigMemberULong: + return objects.NewIntFromBig(new(big.Int).SetUint64(member.Value.(uint64))), nil + case initconfig.ConfigMemberWStr: + return objects.NewStr(member.Value.(string)), nil + case initconfig.ConfigMemberWStrOpt: + s := member.Value.(string) + if s == "" { + return objects.None(), nil + } + return objects.NewStr(s), nil + case initconfig.ConfigMemberWStrList: + items := member.Value.([]string) + objs := make([]objects.Object, len(items)) + for i, s := range items { + objs[i] = objects.NewStr(s) + } + return objects.NewTuple(objs), nil + default: + return nil, fmt.Errorf("SystemError: unreachable config member type") + } +} + +// sysRequiredAttr mirrors _PySys_GetRequiredAttrString: read the named +// attribute from the live sys module, raising RuntimeError when sys or +// the attribute is missing. +// +// CPython: Python/sysmodule.c:99 _PySys_GetRequiredAttrString +func sysRequiredAttr(attr string) (objects.Object, error) { + mod, ok := imp.GetModule("sys") + if !ok { + return nil, fmt.Errorf("RuntimeError: lost sys module") + } + v, err := mod.Dict().GetItem(objects.NewStr(attr)) + if err != nil { + return nil, err + } + if v == nil { + return nil, fmt.Errorf("RuntimeError: lost sys.%s", attr) + } + return v, nil +} + +// configGet ports _testcapi.config_get: parse the option name and return +// PyConfig_Get(name). +// +// CPython: Modules/_testcapi/config.c:4 _testcapi_config_get +func configGet(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: config_get expected 1 argument, got %d", len(args)) + } + name, ok := args[0].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: argument must be str, not %s", args[0].Type().Name) + } + return configGetObject(name.Value()) +} + +// configGetint ports _testcapi.config_getint: PyConfig_GetInt(name), +// which is PyConfig_Get(name) constrained to an int result. +// +// CPython: Modules/_testcapi/config.c:16 _testcapi_config_getint +func configGetint(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: config_getint expected 1 argument, got %d", len(args)) + } + name, ok := args[0].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: argument must be str, not %s", args[0].Type().Name) + } + obj, err := configGetObject(name.Value()) + if err != nil { + return nil, err + } + // CPython: Python/initconfig.c:4478 PyConfig_GetInt (PyLong_Check) + if _, ok := obj.(*objects.Int); !ok { + return nil, fmt.Errorf("TypeError: config option %s is not an int", name.Value()) + } + return obj, nil +} + +// configNames ports _testcapi.config_names: the frozenset of every known +// config option name. +// +// CPython: Modules/_testcapi/config.c:32 _testcapi_config_names +func configNames(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + names := initconfig.ConfigNames() + items := make([]objects.Object, len(names)) + for i, n := range names { + items[i] = objects.NewStr(n) + } + return objects.NewFrozenset(items) +} diff --git a/module/_testcapi/module.go b/module/_testcapi/module.go index d100c7de..d6a24cb5 100644 --- a/module/_testcapi/module.go +++ b/module/_testcapi/module.go @@ -240,6 +240,9 @@ func buildModule() (*objects.Module, error) { {"bad_get", badGet}, {"set_nomemory", setNomemory}, {"remove_mem_hooks", removeMemHooks}, + {"config_get", configGet}, + {"config_getint", configGetint}, + {"config_names", configNames}, } for _, w := range wrappers { if err := d.SetItem(objects.NewStr(w.name), objects.NewBuiltinFunction(w.name, w.fn)); err != nil { From 6c03251d87b2632535bde54e6319b15f597f2df1 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 02:04:31 +0700 Subject: [PATCH 20/84] func: incref __dict__ attribute reads in func_getattro func_getattro pulled the attribute straight out of the function __dict__ and returned it without an incref, so the caller's arg-drop could decref a value the dict still held. A list stored on a function (mock wraps its patchings list on the decorated function this way) got emptied by list_dealloc after the first read, so a second read saw an empty list and the shared decorator silently stopped patching across test classes. Matches PyXINCREF in Objects/funcobject.c func_getattro. --- objects/function.go | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/objects/function.go b/objects/function.go index 1ee2e71c..3ba671a1 100644 --- a/objects/function.go +++ b/objects/function.go @@ -738,6 +738,16 @@ func funcGetAttr(o Object, name Object) (Object, error) { if fn.Dict != nil { v, err := fn.Dict.GetItem(name) if err == nil && v != nil { + // func_getattro reads the attribute out of the function's + // __dict__ through PyDict_GetItemWithError and then Py_XINCREFs + // it before returning, so the caller owns the reference. Without + // the Incref the caller's arg-drop decrefs a value still held by + // __dict__ toward zero; a stored list then gets emptied by + // list_dealloc, so a second read of the same attribute sees an + // empty list (this is what drained mock's patched.patchings). + // + // CPython: Objects/funcobject.c:705 func_getattro (Py_XINCREF) + Incref(v) return v, nil } } From c03e550b2881ce68b1acc09795c6017ca4cfc171 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 02:09:53 +0700 Subject: [PATCH 21/84] spec 1731: record zipimport/test_module green and the live-finders blocker --- .../specs/1700/1731_modules_imports_panel.md | 47 +++++++++++++++---- 1 file changed, 38 insertions(+), 9 deletions(-) diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md index bae2b82f..fd157486 100644 --- a/website/docs/specs/1700/1731_modules_imports_panel.md +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -29,20 +29,20 @@ tree before porting. The panel is the 12 flat files plus the three directory suites. CPython 3.14.5 runs all of the non-interpreter files green. -| Test | CPython 3.14.5 | gopy baseline (audit 2026-06-14) | +| Test | CPython 3.14.5 | gopy (audit 2026-06-15) | | --- | --- | --- | -| `test_module/` (dir) | OK | to re-audit | -| `test_import/` (dir) | OK | to re-audit | -| `test_importlib/` (dir) | OK | to re-audit | -| `test_modulefinder` | OK | `ModuleNotFoundError: modulefinder` | +| `test_module/` (dir) | OK | OK (39 tests) | +| `test_import/` (dir) | OK | import error: full importlib finders not live | +| `test_importlib/` (dir) | OK | depends on live finders | +| `test_modulefinder` | OK | 17 ERROR: `importlib.machinery.PathFinder` missing | | `test_pkg` | OK | AssertionError: module `dir()` missing `__cached__`/`__doc__`/`__loader__`/`__spec__` | -| `test_pkgutil` | OK | `AttributeError: os has no attribute altsep` | +| `test_pkgutil` | OK | 7 failures, 1 error | | `test_pyclbr` | OK | `ModuleNotFoundError: pyclbr` | | `test_pkgimport` | (covered by `test_import/`) | no flat file | -| `test_runpy` | OK | 1 ERROR (`test_run_package_init_exceptions`) | +| `test_runpy` | OK | 3 ERROR | | `test_frozen` | OK | `ModuleNotFoundError: __hello__` (frozen module) | -| `test_zipimport` | OK | `AttributeError: os has no attribute altsep` | -| `test_zipimport_support` | OK | `AttributeError: os has no attribute altsep` | +| `test_zipimport` | OK | **OK (91 tests, 4 skipped)** | +| `test_zipimport_support` | OK | needs vendored `test.test_doctest` (doctest) | | `test_zipapp` | OK | `ModuleNotFoundError: zipapp` | | `test__interpchannels` | PEP 554 | deferred (see below) | | `test__interpreters` | PEP 554 | deferred (`_interpreters.run_string` missing) | @@ -66,6 +66,32 @@ CPython 3.14.5 (counts and `-v` lists). `test_run_package_init_exceptions`; port the package-init exception path. - **P5 — directory suites.** Re-audit `test_import/`, `test_importlib/`, `test_module/` against CPython and close residuals. +- **P7 — live importlib finders (architectural).** gopy dispatches imports + Go-side: `sys.meta_path` is empty where CPython has + `[BuiltinImporter, FrozenImporter, PathFinder]`, and `importlib.machinery` + is a stub that does not re-export `PathFinder` / `FrozenImporter` / + `BuiltinImporter`. The Python finder classes in `_bootstrap.py` exist but + are not wired into `sys.meta_path`, and `_imp` is missing the functions the + full bootstrap drives (`extension_suffixes`, `find_frozen`, + `get_frozen_object`, `is_frozen_package`, `create_builtin`, `exec_builtin`, + `create_dynamic`, `exec_dynamic`, `_fix_co_filename`). This is the root of + the `test_import/`, `test_importlib/`, `test_modulefinder`, and `test_runpy` + residuals. Closing it means making the Python finders the real dispatch path + (populate `sys.meta_path`, port the `_imp` C functions, vendor the full + `_bootstrap_external.py` with `PathFinder`) instead of the Go-side shim. + This is a subsystem port on the scale of its own spec. + +## Notable fixes + +- `func_getattro` now increfs `__dict__` attribute reads + (`Objects/funcobject.c` Py_XINCREF). A list stored on a function (mock keeps + its `patchings` list this way) was emptied by `list_dealloc` after the first + read, so a shared decorator silently stopped patching across test classes. + This fixed `test_zipimport.test_checked_hash_based_change_pyc` in the + cross-class run. +- `_testcapi.config_get` / `config_getint` / `config_names` ported over a + `PyConfig_Get` spec table (`Python/initconfig.c`), fixing the two + `testTraceback` errors. - **P6 — interpreters.** `test__interpreters` / `test__interpchannels` are PEP 554 subinterpreters. Match CPython's behaviour: if CPython skips on this build, gopy skips; otherwise port the `_interpreters` surface the tests reach. @@ -77,7 +103,10 @@ CPython 3.14.5 (counts and `-v` lists). - [ ] P2: vendor `modulefinder` - [ ] P2: vendor `pyclbr` - [ ] P2: vendor `zipapp` +- [x] `test_zipimport` green (91 tests): `func_getattro` incref + `config_get` port +- [x] `test_module/` green (39 tests) - [ ] P3: frozen `__hello__` + frozen module table for `test_frozen` - [ ] P4: `test_runpy` package-init exception path - [ ] P5: re-audit `test_import/`, `test_importlib/`, `test_module/` +- [ ] P7: live importlib finders on `sys.meta_path` + `_imp` C functions (architectural) - [ ] P6: `test__interpreters` / `test__interpchannels` parity with CPython skip/run From b0d53fa0f7faef9221eb40cfea426d660ec49f3b Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 02:38:37 +0700 Subject: [PATCH 22/84] importlib: vendor the real package and make the finders live gopy shipped a trimmed importlib (stub machinery.py, a util.py that imported source_hash from _bootstrap_external instead of defining it, a _bootstrap.py that injected sys/_imp at module top). sys.meta_path was empty and the Python finders were dead code, so anything that introspected the import system or walked meta_path failed. Vendor the unmodified CPython 3.14 files (__init__, _bootstrap, _bootstrap_external, util, machinery, _abc, abc) plus the metadata, resources, readers and simple submodules, then run the two-phase install at startup the way pylifecycle does: __init__ self-bootstraps through its except-ImportError branch (we have no frozen _frozen_importlib), then we call _bootstrap._install / _bootstrap_external._install directly so meta_path ends up as [BuiltinImporter, FrozenImporter, PathFinder] and the FileFinder / zipimport path hooks are registered. Port the _imp C-function surface the full bootstrap drives (find_frozen, get_frozen_object, is_frozen_package, create_builtin, exec_builtin, extension_suffixes, _fix_co_filename) and add sys.pycache_prefix so cache_from_source works. test_runpy goes green (40), test_pkg green, test_pkgutil down to a couple of residuals. --- cmd/gopy/main.go | 38 + module/_imp/module.go | 247 +++- module/sys/sys.go | 7 + stdlib/importlib/__init__.py | 159 ++- stdlib/importlib/_abc.py | 39 + stdlib/importlib/_bootstrap.py | 7 - stdlib/importlib/_bootstrap_external.py | 1584 ++++++++++++++++----- stdlib/importlib/abc.py | 234 +++ stdlib/importlib/machinery.py | 214 +-- stdlib/importlib/metadata/__init__.py | 1093 ++++++++++++++ stdlib/importlib/metadata/_adapters.py | 89 ++ stdlib/importlib/metadata/_collections.py | 30 + stdlib/importlib/metadata/_functools.py | 104 ++ stdlib/importlib/metadata/_itertools.py | 73 + stdlib/importlib/metadata/_meta.py | 67 + stdlib/importlib/metadata/_text.py | 99 ++ stdlib/importlib/metadata/diagnose.py | 21 + stdlib/importlib/readers.py | 12 + stdlib/importlib/resources/__init__.py | 43 + stdlib/importlib/resources/_adapters.py | 168 +++ stdlib/importlib/resources/_common.py | 211 +++ stdlib/importlib/resources/_functional.py | 81 ++ stdlib/importlib/resources/_itertools.py | 38 + stdlib/importlib/resources/abc.py | 173 +++ stdlib/importlib/resources/readers.py | 203 +++ stdlib/importlib/resources/simple.py | 106 ++ stdlib/importlib/simple.py | 14 + stdlib/importlib/util.py | 452 +++--- 28 files changed, 4788 insertions(+), 818 deletions(-) create mode 100644 stdlib/importlib/_abc.py create mode 100644 stdlib/importlib/abc.py create mode 100644 stdlib/importlib/metadata/__init__.py create mode 100644 stdlib/importlib/metadata/_adapters.py create mode 100644 stdlib/importlib/metadata/_collections.py create mode 100644 stdlib/importlib/metadata/_functools.py create mode 100644 stdlib/importlib/metadata/_itertools.py create mode 100644 stdlib/importlib/metadata/_meta.py create mode 100644 stdlib/importlib/metadata/_text.py create mode 100644 stdlib/importlib/metadata/diagnose.py create mode 100644 stdlib/importlib/readers.py create mode 100644 stdlib/importlib/resources/__init__.py create mode 100644 stdlib/importlib/resources/_adapters.py create mode 100644 stdlib/importlib/resources/_common.py create mode 100644 stdlib/importlib/resources/_functional.py create mode 100644 stdlib/importlib/resources/_itertools.py create mode 100644 stdlib/importlib/resources/abc.py create mode 100644 stdlib/importlib/resources/readers.py create mode 100644 stdlib/importlib/resources/simple.py create mode 100644 stdlib/importlib/simple.py diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index e53171b1..9ddaefd7 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -246,6 +246,44 @@ func installPathFinder(scriptPath string) { // // CPython: Python/codecs.c:1690 _PyCodec_Init (PyImport_ImportModule "encodings") func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File) int { + // Initialize the importlib bootstrap before any Python-level import. + // CPython freezes importlib._bootstrap / _bootstrap_external and runs + // init_importlib well before _PyCodec_Init. gopy loads them as regular + // .py modules on first reference; the encodings preload below pulls + // _bootstrap_external in transitively (encodings -> codecs -> + // importlib.util -> _bootstrap_external). Importing it here first means + // it is fully cached before encodings runs, so its own load does not + // re-enter the import system while the encodings package is still + // half-initialized (which would strand `from . import aliases`). + // + // CPython: Python/pylifecycle.c:1041 init_importlib_external + // Two-phase importlib install, mirroring init_importlib / + // init_importlib_external. importlib/__init__.py self-bootstraps via + // its `except ImportError` branch (gopy has no frozen _frozen_importlib), + // which runs _bootstrap._setup(sys, _imp) and binds _bootstrap_external. + // Phase 2 then calls _bootstrap_external._install(_bootstrap) directly + // (CPython's _install_external_importers imports _frozen_importlib_external, + // which gopy lacks), appending PathFinder to sys.meta_path and the + // FileFinder path hook to sys.path_hooks. + // + // CPython: Python/pylifecycle.c:1041 init_importlib_external + install := "import importlib, sys, _imp\n" + + "from importlib import _bootstrap, _bootstrap_external\n" + + "_bootstrap._install(sys, _imp)\n" + + "_bootstrap_external._install(_bootstrap)\n" + + // CPython registers the zipimporter path hook ahead of FileFinder + // (C-side, _PyImportZip_Init) so a sys.path entry pointing at a zip + // archive is claimed before the directory finder rejects it. + // CPython: Python/pylifecycle.c init_importlib_external (zipimport) + "try:\n" + + " import zipimport\n" + + " sys.path_hooks.insert(0, zipimport.zipimporter)\n" + + "except ImportError:\n" + + " pass\n" + if _, err := pythonrun.RunString(ts, install, "", parser.ModeFile, globals, nil); err != nil { + fmt.Fprintln(stderr, "preload importlib:", err) + return 1 + } if _, err := pythonrun.RunString(ts, "import encodings", "", parser.ModeFile, globals, nil); err != nil { fmt.Fprintln(stderr, "preload encodings:", err) return 1 diff --git a/module/_imp/module.go b/module/_imp/module.go index 84141944..98be2ff1 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -1,14 +1,21 @@ // Package _imp is the gopy port of CPython's Modules/_imp module (the -// builtin half lives in Python/import.c). Only the slice consumed by -// the vendored importlib._bootstrap_external is materialized: +// builtin half lives in Python/import.c). It materializes the surface +// the vendored importlib._bootstrap / _bootstrap_external drive: // // - source_hash(key, source) Python/import.c:4869 // - pyc_magic_number_token (int) Python/import.c:4926 // - check_hash_based_pycs (str) Python/import.c:4920 +// - extension_suffixes() Python/import.c:4807 +// - find_frozen / get_frozen_object Python/import.c:4660 / 4592 +// - is_frozen / is_frozen_package Python/import.c:4720 / 4700 +// - create_builtin / exec_builtin Python/import.c:4488 / 4540 +// - create_dynamic / exec_dynamic Python/import.c:4380 / 4440 +// - _fix_co_filename Python/import.c:4318 // -// The rest of the C module (lock_held, find_frozen, create_builtin, -// ...) is intentionally absent — gopy's own imp package already serves -// those roles and importlib does not need _imp to reach them. +// The frozen / builtin entries bridge to gopy's own imp package (the +// frozen table and the inittab), which is the real store for those +// modules. create_dynamic / exec_dynamic raise ImportError: gopy cannot +// load CPython C extension shared objects. // // CPython: Python/import.c:4943 imp_module package _imp @@ -70,22 +77,94 @@ func buildModule() (*objects.Module, error) { })); err != nil { return nil, err } - // is_builtin / is_frozen: gopy has no frozen/builtin import path, so - // both report negative. + // is_builtin(name): 1 when name is in the inittab, else 0. (-1 for a + // loaded-builtin-on-the-frozen-path edge case never arises here.) // - // CPython: Python/import.c:4943 imp_module + // CPython: Python/import.c:4720 _imp_is_builtin_impl if err := d.SetItem(objects.NewStr("is_builtin"), - objects.NewBuiltinFunction("is_builtin", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + objects.NewBuiltinFunction("is_builtin", isBuiltin)); err != nil { + return nil, err + } + // is_frozen(name): True when name is a frozen module with embedded + // bytecode. + // + // CPython: Python/import.c:4740 _imp_is_frozen_impl + if err := d.SetItem(objects.NewStr("is_frozen"), + objects.NewBuiltinFunction("is_frozen", isFrozen)); err != nil { + return nil, err + } + // extension_suffixes(): gopy cannot dynamically load CPython C + // extension shared objects, so the list of extension suffixes is + // empty. ExtensionFileLoader is therefore never wired to any suffix + // in _bootstrap_external._setup. + // + // CPython: Python/import.c:4807 _imp_extension_suffixes_impl + if err := d.SetItem(objects.NewStr("extension_suffixes"), + objects.NewBuiltinFunction("extension_suffixes", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + return objects.NewList(nil), nil + })); err != nil { + return nil, err + } + // find_frozen / get_frozen_object / is_frozen_package bridge to + // gopy's frozen module table (imp/frozen.go). + // + // CPython: Python/import.c:4660 _imp_find_frozen_impl + // CPython: Python/import.c:4592 _imp_get_frozen_object_impl + // CPython: Python/import.c:4700 _imp_is_frozen_package_impl + if err := d.SetItem(objects.NewStr("find_frozen"), + objects.NewBuiltinFunction("find_frozen", findFrozen)); err != nil { + return nil, err + } + if err := d.SetItem(objects.NewStr("get_frozen_object"), + objects.NewBuiltinFunction("get_frozen_object", getFrozenObject)); err != nil { + return nil, err + } + if err := d.SetItem(objects.NewStr("is_frozen_package"), + objects.NewBuiltinFunction("is_frozen_package", isFrozenPackage)); err != nil { + return nil, err + } + // create_builtin / exec_builtin bridge to the inittab. gopy's + // initfunc builds a fully-initialized module in one step, so + // create_builtin runs it and exec_builtin is a no-op. + // + // CPython: Python/import.c:4488 _imp_create_builtin + // CPython: Python/import.c:4540 _imp_exec_builtin_impl + if err := d.SetItem(objects.NewStr("create_builtin"), + objects.NewBuiltinFunction("create_builtin", createBuiltin)); err != nil { + return nil, err + } + if err := d.SetItem(objects.NewStr("exec_builtin"), + objects.NewBuiltinFunction("exec_builtin", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { return objects.NewInt(0), nil })); err != nil { return nil, err } - if err := d.SetItem(objects.NewStr("is_frozen"), - objects.NewBuiltinFunction("is_frozen", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { - return objects.NewBool(false), nil + // create_dynamic / exec_dynamic: gopy cannot load CPython C + // extension shared objects. Match CPython's failure shape with an + // ImportError rather than silently succeeding. + // + // CPython: Python/import.c:4380 _imp_create_dynamic_impl + // CPython: Python/import.c:4440 _imp_exec_dynamic_impl + if err := d.SetItem(objects.NewStr("create_dynamic"), + objects.NewBuiltinFunction("create_dynamic", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + return nil, fmt.Errorf("ImportError: gopy does not support dynamic (C extension) module loading") })); err != nil { return nil, err } + if err := d.SetItem(objects.NewStr("exec_dynamic"), + objects.NewBuiltinFunction("exec_dynamic", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + return nil, fmt.Errorf("ImportError: gopy does not support dynamic (C extension) module loading") + })); err != nil { + return nil, err + } + // _fix_co_filename(code, path): rewrite co_filename on a code object + // (and its nested code consts) in place. + // + // CPython: Python/import.c:4318 _imp__fix_co_filename_impl + if err := d.SetItem(objects.NewStr("_fix_co_filename"), + objects.NewBuiltinFunction("_fix_co_filename", fixCoFilename)); err != nil { + return nil, err + } // _override_frozen_modules_for_tests / _override_multi_interp_extensions_check: // test.support.import_helper toggles these around test runs. gopy // keeps them as no-ops returning a sentinel int matching CPython's @@ -108,6 +187,150 @@ func buildModule() (*objects.Module, error) { return m, nil } +// nameArg pulls a single str positional out of args for the frozen / +// builtin query functions, which all take exactly one module name. +func nameArg(fn string, args []objects.Object) (string, error) { + if len(args) < 1 { + return "", fmt.Errorf("TypeError: %s() missing required argument", fn) + } + u, ok := args[0].(*objects.Unicode) + if !ok { + return "", fmt.Errorf("TypeError: %s() argument must be str, not '%T'", fn, args[0]) + } + return u.Value(), nil +} + +// isBuiltin implements _imp.is_builtin(name). +// +// CPython: Python/import.c:4720 _imp_is_builtin_impl +func isBuiltin(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + name, err := nameArg("is_builtin", args) + if err != nil { + return nil, err + } + if imp.FindInitFunc(name) != nil { + return objects.NewInt(1), nil + } + return objects.NewInt(0), nil +} + +// isFrozen implements _imp.is_frozen(name): True only when the name has +// embedded bytecode (a placeholder entry with nil Code is not frozen). +// +// CPython: Python/import.c:4740 _imp_is_frozen_impl +func isFrozen(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + name, err := nameArg("is_frozen", args) + if err != nil { + return nil, err + } + fm, ok := imp.FindFrozen(name) + return objects.NewBool(ok && fm.Code != nil), nil +} + +// isFrozenPackage implements _imp.is_frozen_package(name). +// +// CPython: Python/import.c:4700 _imp_is_frozen_package_impl +func isFrozenPackage(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + name, err := nameArg("is_frozen_package", args) + if err != nil { + return nil, err + } + fm, ok := imp.FindFrozen(name) + if !ok || fm.Code == nil { + return nil, fmt.Errorf("ImportError: No such frozen object named %s", name) + } + return objects.NewBool(fm.IsPackage), nil +} + +// findFrozen implements _imp.find_frozen(name, *, withdata=False). It +// returns a 3-tuple (data, is_package, origname) or None. gopy stores +// frozen modules as code objects, not marshalled blobs, so the data +// slot is always None (FrozenImporter.find_spec discards it and fetches +// the code later via get_frozen_object). +// +// CPython: Python/import.c:4660 _imp_find_frozen_impl +func findFrozen(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + name, err := nameArg("find_frozen", args) + if err != nil { + return nil, err + } + fm, ok := imp.FindFrozen(name) + if !ok || fm.Code == nil { + return objects.None(), nil + } + return objects.NewTuple([]objects.Object{ + objects.None(), + objects.NewBool(fm.IsPackage), + objects.NewStr(name), + }), nil +} + +// getFrozenObject implements _imp.get_frozen_object(name, data=None). It +// returns the frozen module's code object. +// +// CPython: Python/import.c:4592 _imp_get_frozen_object_impl +func getFrozenObject(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + name, err := nameArg("get_frozen_object", args) + if err != nil { + return nil, err + } + fm, ok := imp.FindFrozen(name) + if !ok || fm.Code == nil { + return nil, fmt.Errorf("ImportError: No such frozen object named %s", name) + } + return fm.Code, nil +} + +// createBuiltin implements _imp.create_builtin(spec). It reads spec.name +// and runs the matching inittab initializer, which builds a fully +// initialized module (gopy has no separate exec phase for builtins). +// +// CPython: Python/import.c:4488 _imp_create_builtin +func createBuiltin(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 1 { + return nil, fmt.Errorf("TypeError: create_builtin() missing required argument 'spec'") + } + nameObj, err := objects.GetAttr(args[0], objects.NewStr("name")) + if err != nil { + return nil, err + } + u, ok := nameObj.(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: spec.name must be str, not '%T'", nameObj) + } + name := u.Value() + initFn := imp.FindInitFunc(name) + if initFn == nil { + return nil, fmt.Errorf("ImportError: no built-in module named %s", name) + } + mod, err := initFn() + if err != nil { + return nil, err + } + mod.StampBuiltinModule() + return mod, nil +} + +// fixCoFilename implements _imp._fix_co_filename(code, path). It rewrites +// co_filename on the code object in place. +// +// CPython: Python/import.c:4318 _imp__fix_co_filename_impl +func fixCoFilename(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 2 { + return nil, fmt.Errorf("TypeError: _fix_co_filename() takes exactly 2 arguments") + } + code, ok := args[0].(*objects.Code) + if !ok { + return nil, fmt.Errorf("TypeError: _fix_co_filename() argument 1 must be code, not '%T'", args[0]) + } + path, ok := args[1].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: _fix_co_filename() argument 2 must be str, not '%T'", args[1]) + } + code.Filename = path.Value() + return objects.None(), nil +} + // sourceHash mirrors _imp.source_hash(key, source). It hashes the // source buffer with SipHash-1-3 keyed by `key` and returns the result // as 8 little-endian bytes. diff --git a/module/sys/sys.go b/module/sys/sys.go index 26e70c76..a5127b16 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -132,6 +132,13 @@ func Init() (*objects.Dict, error) { if err := setItem(d, "dont_write_bytecode", objects.NewBool(true)); err != nil { return nil, err } + // pycache_prefix controls where the import machinery writes .pyc + // caches; None means alongside the source. cache_from_source reads it. + // + // CPython: Python/sysmodule.c sets sys.pycache_prefix from PyConfig + if err := setItem(d, "pycache_prefix", objects.None()); err != nil { + return nil, err + } if err := setItem(d, "path_hooks", objects.NewList(nil)); err != nil { return nil, err } diff --git a/stdlib/importlib/__init__.py b/stdlib/importlib/__init__.py index 269fbeff..a7d57561 100644 --- a/stdlib/importlib/__init__.py +++ b/stdlib/importlib/__init__.py @@ -1,55 +1,136 @@ -"""importlib: gopy-side stub. +"""A pure Python implementation of import.""" +__all__ = ['__import__', 'import_module', 'invalidate_caches', 'reload'] -CPython ships a multi-module package whose top-level __init__.py -re-exports a handful of names from ._bootstrap and ._bootstrap_external. -gopy's import system is the Go side of the runtime so the bootstrap -plumbing has no analogue here. Until the full importlib port lands, -this module exists so `import importlib` and `import importlib.machinery` -resolve for downstream consumers (notably inspect.py, which only reads -the SUFFIXES constants and all_suffixes()). +# Bootstrap help ##################################################### -CPython: Lib/importlib/__init__.py -""" +# Until bootstrapping is complete, DO NOT import any modules that attempt +# to import importlib._bootstrap (directly or indirectly). Since this +# partially initialised package would be present in sys.modules, those +# modules would get an uninitialised copy of the source version, instead +# of a fully initialised version (either the frozen one or the one +# initialised below if the frozen one is not available). +import _imp # Just the builtin component, NOT the full Python module +import sys -from . import machinery # bind importlib.machinery attribute eagerly +try: + import _frozen_importlib as _bootstrap +except ImportError: + from . import _bootstrap + _bootstrap._setup(sys, _imp) +else: + # importlib._bootstrap is the built-in import, ensure we don't create + # a second copy of the module. + _bootstrap.__name__ = 'importlib._bootstrap' + _bootstrap.__package__ = 'importlib' + try: + _bootstrap.__file__ = __file__.replace('__init__.py', '_bootstrap.py') + except NameError: + # __file__ is not guaranteed to be defined, e.g. if this code gets + # frozen by a tool like cx_Freeze. + pass + sys.modules['importlib._bootstrap'] = _bootstrap -# CPython re-exports the bootstrap __import__ here (Lib/importlib/__init__.py -# `from ._bootstrap import __import__`). gopy's bootstrap lives Go-side and -# is what builtins.__import__ already points at, so re-export that to keep -# the public `importlib.__import__` surface. -from builtins import __import__ +try: + import _frozen_importlib_external as _bootstrap_external +except ImportError: + from . import _bootstrap_external + _bootstrap_external._set_bootstrap_module(_bootstrap) + _bootstrap._bootstrap_external = _bootstrap_external +else: + _bootstrap_external.__name__ = 'importlib._bootstrap_external' + _bootstrap_external.__package__ = 'importlib' + try: + _bootstrap_external.__file__ = __file__.replace('__init__.py', '_bootstrap_external.py') + except NameError: + # __file__ is not guaranteed to be defined, e.g. if this code gets + # frozen by a tool like cx_Freeze. + pass + sys.modules['importlib._bootstrap_external'] = _bootstrap_external -__all__ = ['import_module', 'invalidate_caches', 'machinery', 'reload'] +# To simplify imports in test code +_pack_uint32 = _bootstrap_external._pack_uint32 +_unpack_uint32 = _bootstrap_external._unpack_uint32 + +# Fully bootstrapped at this point, import whatever you like, circular +# dependencies and startup overhead minimisation permitting :) + + +# Public API ######################################################### + +from ._bootstrap import __import__ + + +def invalidate_caches(): + """Call the invalidate_caches() method on all meta path finders stored in + sys.meta_path (where implemented).""" + for finder in sys.meta_path: + if hasattr(finder, 'invalidate_caches'): + finder.invalidate_caches() def import_module(name, package=None): - """Import a module by name. Mirrors importlib.import_module.""" - if package is not None and name.startswith('.'): - name = _resolve_name(name, package) - __import__(name) - import sys - return sys.modules[name] + """Import a module. + The 'package' argument is required when performing a relative import. It + specifies the package to use as the anchor point from which to resolve the + relative import to an absolute import. -def _resolve_name(name, package): + """ level = 0 - while level < len(name) and name[level] == '.': - level += 1 - if level == 0: - return name - bits = package.rsplit('.', level - 1) - if len(bits) < level: - raise ImportError("attempted relative import beyond top-level package") - base = bits[0] - return '{}.{}'.format(base, name[level:]) if name[level:] else base + if name.startswith('.'): + if not package: + raise TypeError("the 'package' argument is required to perform a " + f"relative import for {name!r}") + for character in name: + if character != '.': + break + level += 1 + return _bootstrap._gcd_import(name[level:], package, level) -def invalidate_caches(): - """No-op: gopy's import system has no path-importer cache to flush.""" - return None +_RELOADING = {} def reload(module): - """Reload a module. The actual machinery is wired up Go-side.""" - import _imp - return _imp.reload(module) + """Reload the module and return it. + + The module must have been successfully imported before. + + """ + try: + name = module.__spec__.name + except AttributeError: + try: + name = module.__name__ + except AttributeError: + raise TypeError("reload() argument must be a module") from None + + if sys.modules.get(name) is not module: + raise ImportError(f"module {name} not in sys.modules", name=name) + if name in _RELOADING: + return _RELOADING[name] + _RELOADING[name] = module + try: + parent_name = name.rpartition('.')[0] + if parent_name: + try: + parent = sys.modules[parent_name] + except KeyError: + raise ImportError(f"parent {parent_name!r} not in sys.modules", + name=parent_name) from None + else: + pkgpath = parent.__path__ + else: + pkgpath = None + target = module + spec = module.__spec__ = _bootstrap._find_spec(name, pkgpath, target) + if spec is None: + raise ModuleNotFoundError(f"spec not found for the module {name!r}", name=name) + _bootstrap._exec(spec, module) + # The module may have replaced itself in sys.modules! + return sys.modules[name] + finally: + try: + del _RELOADING[name] + except KeyError: + pass diff --git a/stdlib/importlib/_abc.py b/stdlib/importlib/_abc.py new file mode 100644 index 00000000..693b4661 --- /dev/null +++ b/stdlib/importlib/_abc.py @@ -0,0 +1,39 @@ +"""Subset of importlib.abc used to reduce importlib.util imports.""" +from . import _bootstrap +import abc + + +class Loader(metaclass=abc.ABCMeta): + + """Abstract base class for import loaders.""" + + def create_module(self, spec): + """Return a module to initialize and into which to load. + + This method should raise ImportError if anything prevents it + from creating a new module. It may return None to indicate + that the spec should create the new module. + """ + # By default, defer to default semantics for the new module. + return None + + # We don't define exec_module() here since that would break + # hasattr checks we do to support backward compatibility. + + def load_module(self, fullname): + """Return the loaded module. + + The module must be added to sys.modules and have import-related + attributes set properly. The fullname is a str. + + ImportError is raised on failure. + + This method is deprecated in favor of loader.exec_module(). If + exec_module() exists then it is used to provide a backwards-compatible + functionality for this method. + + """ + if not hasattr(self, 'exec_module'): + raise ImportError + # Warning implemented in _load_module_shim(). + return _bootstrap._load_module_shim(self, fullname) diff --git a/stdlib/importlib/_bootstrap.py b/stdlib/importlib/_bootstrap.py index e9efa803..9d911e1d 100644 --- a/stdlib/importlib/_bootstrap.py +++ b/stdlib/importlib/_bootstrap.py @@ -28,13 +28,6 @@ def _object_name(obj): # Bootstrap-related code ###################################################### -# CPython freezes this module and injects sys / _imp through _setup() -# during interpreter start. gopy imports it like any other module and -# never runs _setup(), so bind the two modules the bootstrap code needs -# (sys.modules access, _imp for built-in queries) at import time. -import sys -import _imp - # Modules injected manually by _setup() _thread = None _warnings = None diff --git a/stdlib/importlib/_bootstrap_external.py b/stdlib/importlib/_bootstrap_external.py index 43b73849..6a828ae7 100644 --- a/stdlib/importlib/_bootstrap_external.py +++ b/stdlib/importlib/_bootstrap_external.py @@ -1,30 +1,43 @@ -"""Pyc-writer slice of CPython's Lib/importlib/_bootstrap_external.py. +"""Core implementation of path-based import. -The vendored file ships only the parts py_compile needs: MAGIC_NUMBER, -_pack_uint32 / _unpack_uint*, _calc_mode, _write_atomic, _classify_pyc -plus the two pyc-data builders _code_to_timestamp_pyc / -_code_to_hash_pyc. The path / loader / spec scaffolding lives in the -companion util.py stub until spec 1711 wires the full module. +This module is NOT meant to be directly imported! It has been designed such +that it can be bootstrapped into Python as the implementation of import. As +such it requires the injection of specific modules and attributes in order to +work. One should use importlib as the public-facing version of this module. -CPython: Lib/importlib/_bootstrap_external.py """ +# IMPORTANT: Whenever making changes to this module, be sure to run a top-level +# `make regen-importlib` followed by `make` in order to get the frozen version +# of the module updated. Not doing so will result in the Makefile to fail for +# all others who don't have a ./python around to freeze the module in the early +# stages of compilation. +# + +# See importlib._setup() for what is injected into the global namespace. + +# When editing this code be aware that code executed at import time CANNOT +# reference any injected objects! This includes not only global code but also +# anything specified at the class level. + +# Module injected manually by _set_bootstrap_module() +_bootstrap = None +# Import builtin modules import _imp -import marshal -import os as _os +import _io import sys - -# CPython freezes _bootstrap and wires it through _set_bootstrap_module -# during _install. gopy resolves imports Go-side and never runs that -# install, so bind the companion module directly. _bootstrap does not -# import _bootstrap_external at load time (it keeps a lazily-populated -# global), so this top-level import does not create a cycle. -# -# CPython: Lib/importlib/_bootstrap_external.py:1553 _set_bootstrap_module -import importlib._bootstrap as _bootstrap +import _warnings +import marshal _MS_WINDOWS = (sys.platform == 'win32') +if _MS_WINDOWS: + import nt as _os + import winreg +else: + import posix as _os + + if _MS_WINDOWS: path_separators = ['\\', '/'] else: @@ -34,45 +47,168 @@ path_sep = path_separators[0] path_sep_tuple = tuple(path_separators) path_separators = ''.join(path_separators) +_pathseps_with_colon = {f':{s}' for s in path_separators} + + +# Bootstrap-related code ###################################################### +_CASE_INSENSITIVE_PLATFORMS_STR_KEY = 'win', +_CASE_INSENSITIVE_PLATFORMS_BYTES_KEY = 'cygwin', 'darwin', 'ios', 'tvos', 'watchos' +_CASE_INSENSITIVE_PLATFORMS = (_CASE_INSENSITIVE_PLATFORMS_BYTES_KEY + + _CASE_INSENSITIVE_PLATFORMS_STR_KEY) + + +def _make_relax_case(): + if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS): + if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS_STR_KEY): + key = 'PYTHONCASEOK' + else: + key = b'PYTHONCASEOK' + + def _relax_case(): + """True if filenames must be checked case-insensitively and ignore environment flags are not set.""" + return not sys.flags.ignore_environment and key in _os.environ + else: + def _relax_case(): + """True if filenames must be checked case-insensitively.""" + return False + return _relax_case + +_relax_case = _make_relax_case() -# CPython: Lib/importlib/_bootstrap_external.py:79 _pack_uint32 def _pack_uint32(x): """Convert a 32-bit integer to little-endian.""" return (int(x) & 0xFFFFFFFF).to_bytes(4, 'little') -# CPython: Lib/importlib/_bootstrap_external.py:84 _unpack_uint64 def _unpack_uint64(data): """Convert 8 bytes in little-endian to an integer.""" assert len(data) == 8 return int.from_bytes(data, 'little') - -# CPython: Lib/importlib/_bootstrap_external.py:89 _unpack_uint32 def _unpack_uint32(data): """Convert 4 bytes in little-endian to an integer.""" assert len(data) == 4 return int.from_bytes(data, 'little') - -# CPython: Lib/importlib/_bootstrap_external.py:94 _unpack_uint16 def _unpack_uint16(data): """Convert 2 bytes in little-endian to an integer.""" assert len(data) == 2 return int.from_bytes(data, 'little') -# CPython: Lib/importlib/_bootstrap_external.py:200 _write_atomic +if _MS_WINDOWS: + def _path_join(*path_parts): + """Replacement for os.path.join().""" + if not path_parts: + return "" + if len(path_parts) == 1: + return path_parts[0] + root = "" + path = [] + for new_root, tail in map(_os._path_splitroot, path_parts): + if new_root.startswith(path_sep_tuple) or new_root.endswith(path_sep_tuple): + root = new_root.rstrip(path_separators) or root + path = [path_sep + tail] + elif new_root.endswith(':'): + if root.casefold() != new_root.casefold(): + # Drive relative paths have to be resolved by the OS, so we reset the + # tail but do not add a path_sep prefix. + root = new_root + path = [tail] + else: + path.append(tail) + else: + root = new_root or root + path.append(tail) + path = [p.rstrip(path_separators) for p in path if p] + if len(path) == 1 and not path[0]: + # Avoid losing the root's trailing separator when joining with nothing + return root + path_sep + return root + path_sep.join(path) + +else: + def _path_join(*path_parts): + """Replacement for os.path.join().""" + return path_sep.join([part.rstrip(path_separators) + for part in path_parts if part]) + + +def _path_split(path): + """Replacement for os.path.split().""" + i = max(path.rfind(p) for p in path_separators) + if i < 0: + return '', path + return path[:i], path[i + 1:] + + +def _path_stat(path): + """Stat the path. + + Made a separate function to make it easier to override in experiments + (e.g. cache stat results). + + """ + return _os.stat(path) + + +def _path_is_mode_type(path, mode): + """Test whether the path is the specified mode type.""" + try: + stat_info = _path_stat(path) + except OSError: + return False + return (stat_info.st_mode & 0o170000) == mode + + +def _path_isfile(path): + """Replacement for os.path.isfile.""" + return _path_is_mode_type(path, 0o100000) + + +def _path_isdir(path): + """Replacement for os.path.isdir.""" + if not path: + path = _os.getcwd() + return _path_is_mode_type(path, 0o040000) + + +if _MS_WINDOWS: + def _path_isabs(path): + """Replacement for os.path.isabs.""" + if not path: + return False + root = _os._path_splitroot(path)[0].replace('/', '\\') + return len(root) > 1 and (root.startswith('\\\\') or root.endswith('\\')) + +else: + def _path_isabs(path): + """Replacement for os.path.isabs.""" + return path.startswith(path_separators) + + +def _path_abspath(path): + """Replacement for os.path.abspath.""" + if not _path_isabs(path): + for sep in path_separators: + path = path.removeprefix(f".{sep}") + return _path_join(_os.getcwd(), path) + else: + return path + + def _write_atomic(path, data, mode=0o666): """Best-effort function to write data to a path atomically. Be prepared to handle a FileExistsError if concurrent writing of the temporary file is attempted.""" + # id() is used to generate a pseudo-random filename. path_tmp = f'{path}.{id(path)}' fd = _os.open(path_tmp, _os.O_EXCL | _os.O_CREAT | _os.O_WRONLY, mode & 0o666) try: - with open(fd, 'wb') as file: + # We first write data to a temporary file, and then use os.replace() to + # perform an atomic rename. + with _io.open(fd, 'wb') as file: file.write(data) _os.replace(path_tmp, path) except OSError: @@ -83,21 +219,169 @@ def _write_atomic(path, data, mode=0o666): raise -# CPython: Lib/importlib/_bootstrap_external.py:224 MAGIC_NUMBER +_code_type = type(_write_atomic.__code__) + MAGIC_NUMBER = _imp.pyc_magic_number_token.to_bytes(4, 'little') _PYCACHE = '__pycache__' _OPT = 'opt-' SOURCE_SUFFIXES = ['.py'] +if _MS_WINDOWS: + SOURCE_SUFFIXES.append('.pyw') + +EXTENSION_SUFFIXES = _imp.extension_suffixes() + BYTECODE_SUFFIXES = ['.pyc'] +# Deprecated. +DEBUG_BYTECODE_SUFFIXES = OPTIMIZED_BYTECODE_SUFFIXES = BYTECODE_SUFFIXES + +def cache_from_source(path, debug_override=None, *, optimization=None): + """Given the path to a .py file, return the path to its .pyc file. + + The .py file does not need to exist; this simply returns the path to the + .pyc file calculated as if the .py file were imported. + + The 'optimization' parameter controls the presumed optimization level of + the bytecode file. If 'optimization' is not None, the string representation + of the argument is taken and verified to be alphanumeric (else ValueError + is raised). + + The debug_override parameter is deprecated. If debug_override is not None, + a True value is the same as setting 'optimization' to the empty string + while a False value is equivalent to setting 'optimization' to '1'. + + If sys.implementation.cache_tag is None then NotImplementedError is raised. + + """ + if debug_override is not None: + _warnings.warn('the debug_override parameter is deprecated; use ' + "'optimization' instead", DeprecationWarning) + if optimization is not None: + message = 'debug_override or optimization must be set to None' + raise TypeError(message) + optimization = '' if debug_override else 1 + path = _os.fspath(path) + head, tail = _path_split(path) + base, sep, rest = tail.rpartition('.') + tag = sys.implementation.cache_tag + if tag is None: + raise NotImplementedError('sys.implementation.cache_tag is None') + almost_filename = ''.join([(base if base else rest), sep, tag]) + if optimization is None: + if sys.flags.optimize == 0: + optimization = '' + else: + optimization = sys.flags.optimize + optimization = str(optimization) + if optimization != '': + if not optimization.isalnum(): + raise ValueError(f'{optimization!r} is not alphanumeric') + almost_filename = f'{almost_filename}.{_OPT}{optimization}' + filename = almost_filename + BYTECODE_SUFFIXES[0] + if sys.pycache_prefix is not None: + # We need an absolute path to the py file to avoid the possibility of + # collisions within sys.pycache_prefix, if someone has two different + # `foo/bar.py` on their system and they import both of them using the + # same sys.pycache_prefix. Let's say sys.pycache_prefix is + # `C:\Bytecode`; the idea here is that if we get `Foo\Bar`, we first + # make it absolute (`C:\Somewhere\Foo\Bar`), then make it root-relative + # (`Somewhere\Foo\Bar`), so we end up placing the bytecode file in an + # unambiguous `C:\Bytecode\Somewhere\Foo\Bar\`. + head = _path_abspath(head) + + # Strip initial drive from a Windows path. We know we have an absolute + # path here, so the second part of the check rules out a POSIX path that + # happens to contain a colon at the second character. + # Slicing avoids issues with an empty (or short) `head`. + if head[1:2] == ':' and head[0:1] not in path_separators: + head = head[2:] + + # Strip initial path separator from `head` to complete the conversion + # back to a root-relative path before joining. + return _path_join( + sys.pycache_prefix, + head.lstrip(path_separators), + filename, + ) + return _path_join(head, _PYCACHE, filename) + + +def source_from_cache(path): + """Given the path to a .pyc. file, return the path to its .py file. + + The .pyc file does not need to exist; this simply returns the path to + the .py file calculated to correspond to the .pyc file. If path does + not conform to PEP 3147/488 format, ValueError will be raised. If + sys.implementation.cache_tag is None then NotImplementedError is raised. + + """ + if sys.implementation.cache_tag is None: + raise NotImplementedError('sys.implementation.cache_tag is None') + path = _os.fspath(path) + head, pycache_filename = _path_split(path) + found_in_pycache_prefix = False + if sys.pycache_prefix is not None: + stripped_path = sys.pycache_prefix.rstrip(path_separators) + if head.startswith(stripped_path + path_sep): + head = head[len(stripped_path):] + found_in_pycache_prefix = True + if not found_in_pycache_prefix: + head, pycache = _path_split(head) + if pycache != _PYCACHE: + raise ValueError(f'{_PYCACHE} not bottom-level directory in ' + f'{path!r}') + dot_count = pycache_filename.count('.') + if dot_count not in {2, 3}: + raise ValueError(f'expected only 2 or 3 dots in {pycache_filename!r}') + elif dot_count == 3: + optimization = pycache_filename.rsplit('.', 2)[-2] + if not optimization.startswith(_OPT): + raise ValueError("optimization portion of filename does not start " + f"with {_OPT!r}") + opt_level = optimization[len(_OPT):] + if not opt_level.isalnum(): + raise ValueError(f"optimization level {optimization!r} is not an " + "alphanumeric value") + base_filename = pycache_filename.partition('.')[0] + return _path_join(head, base_filename + SOURCE_SUFFIXES[0]) + + +def _get_sourcefile(bytecode_path): + """Convert a bytecode file path to a source path (if possible). + + This function exists purely for backwards-compatibility for + PyImport_ExecCodeModuleWithFilenames() in the C API. + + """ + if len(bytecode_path) == 0: + return None + rest, _, extension = bytecode_path.rpartition('.') + if not rest or extension.lower()[-3:-1] != 'py': + return bytecode_path + try: + source_path = source_from_cache(bytecode_path) + except (NotImplementedError, ValueError): + source_path = bytecode_path[:-1] + return source_path if _path_isfile(source_path) else bytecode_path + + +def _get_cached(filename): + if filename.endswith(tuple(SOURCE_SUFFIXES)): + try: + return cache_from_source(filename) + except NotImplementedError: + pass + elif filename.endswith(tuple(BYTECODE_SUFFIXES)): + return filename + else: + return None -# CPython: Lib/importlib/_bootstrap_external.py:381 _calc_mode def _calc_mode(path): """Calculate the mode permissions for a bytecode file.""" try: - mode = _os.stat(path).st_mode + mode = _path_stat(path).st_mode except OSError: mode = 0o666 # We always ensure write access so we can update cached files @@ -106,7 +390,37 @@ def _calc_mode(path): return mode -# CPython: Lib/importlib/_bootstrap_external.py:424 _classify_pyc +def _check_name(method): + """Decorator to verify that the module being requested matches the one the + loader can handle. + + The first argument (self) must define _name which the second argument is + compared against. If the comparison fails then ImportError is raised. + + """ + def _check_name_wrapper(self, name=None, *args, **kwargs): + if name is None: + name = self.name + elif self.name != name: + raise ImportError('loader for %s cannot handle %s' % + (self.name, name), name=name) + return method(self, name, *args, **kwargs) + + # FIXME: @_check_name is used to define class methods before the + # _bootstrap module is set by _set_bootstrap_module(). + if _bootstrap is not None: + _wrap = _bootstrap._wrap + else: + def _wrap(new, old): + for replace in ['__module__', '__name__', '__qualname__', '__doc__']: + if hasattr(old, replace): + setattr(new, replace, getattr(old, replace)) + new.__dict__.update(old.__dict__) + + _wrap(_check_name_wrapper, method) + return _check_name_wrapper + + def _classify_pyc(data, name, exc_details): """Perform basic validity checking of a pyc header and return the flags field, which determines how the pyc should be further validated against the source. @@ -126,9 +440,11 @@ def _classify_pyc(data, name, exc_details): magic = data[:4] if magic != MAGIC_NUMBER: message = f'bad magic number in {name!r}: {magic!r}' + _bootstrap._verbose_message('{}', message) raise ImportError(message, **exc_details) if len(data) < 16: message = f'reached EOF while reading pyc header of {name!r}' + _bootstrap._verbose_message('{}', message) raise EOFError(message) flags = _unpack_uint32(data[4:8]) # Only the first two flags are defined. @@ -138,22 +454,50 @@ def _classify_pyc(data, name, exc_details): return flags -# CPython: Lib/importlib/_bootstrap_external.py:457 _validate_timestamp_pyc def _validate_timestamp_pyc(data, source_mtime, source_size, name, exc_details): - """Validate a pyc against the source last-modified time.""" + """Validate a pyc against the source last-modified time. + + *data* is the contents of the pyc file. (Only the first 16 bytes are + required.) + + *source_mtime* is the last modified timestamp of the source file. + + *source_size* is None or the size of the source file in bytes. + + *name* is the name of the module being imported. It is used for logging. + + *exc_details* is a dictionary passed to ImportError if it raised for + improved debugging. + + An ImportError is raised if the bytecode is stale. + + """ if _unpack_uint32(data[8:12]) != (source_mtime & 0xFFFFFFFF): message = f'bytecode is stale for {name!r}' + _bootstrap._verbose_message('{}', message) raise ImportError(message, **exc_details) if (source_size is not None and _unpack_uint32(data[12:16]) != (source_size & 0xFFFFFFFF)): raise ImportError(f'bytecode is stale for {name!r}', **exc_details) -# CPython: Lib/importlib/_bootstrap_external.py:485 _validate_hash_pyc def _validate_hash_pyc(data, source_hash, name, exc_details): """Validate a hash-based pyc by checking the real source hash against the one in the pyc header. + + *data* is the contents of the pyc file. (Only the first 16 bytes are + required.) + + *source_hash* is the importlib.util.source_hash() of the source file. + + *name* is the name of the module being imported. It is used for logging. + + *exc_details* is a dictionary passed to ImportError if it raised for + improved debugging. + + An ImportError is raised if the bytecode is stale. + """ if data[8:16] != source_hash: raise ImportError( @@ -162,7 +506,19 @@ def _validate_hash_pyc(data, source_hash, name, exc_details): ) -# CPython: Lib/importlib/_bootstrap_external.py:522 _code_to_timestamp_pyc +def _compile_bytecode(data, name=None, bytecode_path=None, source_path=None): + """Compile bytecode as found in a pyc.""" + code = marshal.loads(data) + if isinstance(code, _code_type): + _bootstrap._verbose_message('code object from {!r}', bytecode_path) + if source_path is not None: + _imp._fix_co_filename(code, source_path) + return code + else: + raise ImportError(f'Non-code object in {bytecode_path!r}', + name=name, path=bytecode_path) + + def _code_to_timestamp_pyc(code, mtime=0, source_size=0): "Produce the data for a timestamp-based pyc." data = bytearray(MAGIC_NUMBER) @@ -173,7 +529,6 @@ def _code_to_timestamp_pyc(code, mtime=0, source_size=0): return data -# CPython: Lib/importlib/_bootstrap_external.py:532 _code_to_hash_pyc def _code_to_hash_pyc(code, source_hash, checked=True): "Produce the data for a hash-based pyc." data = bytearray(MAGIC_NUMBER) @@ -185,227 +540,34 @@ def _code_to_hash_pyc(code, source_hash, checked=True): return data -# CPython exposes this as importlib.util.source_hash. We thread it -# through the same _imp builtin _bootstrap_external relies on. -# -# CPython: Lib/importlib/util.py source_hash (re-export of _imp.source_hash) -def source_hash(source_bytes): - """Return the hash of *source_bytes* as bytes.""" - return _imp.source_hash(_RAW_MAGIC_NUMBER, source_bytes) - - -# _RAW_MAGIC_NUMBER mirrors CPython: the integer form of MAGIC_NUMBER is -# fed straight back into _imp.source_hash as the SipHash key. Keeping -# the conversion in one place avoids endian-swap mistakes at call sites. -# -# CPython: Lib/importlib/_bootstrap_external.py:223 _RAW_MAGIC_NUMBER -_RAW_MAGIC_NUMBER = _imp.pyc_magic_number_token - - -# CPython: Lib/importlib/_bootstrap_external.py:543 decode_source def decode_source(source_bytes): """Decode bytes representing source code and return the string. Universal newline support is used in the decoding. """ - # gopy doesn't have tokenize.detect_encoding wired through this path - # yet, so fall back to utf-8 (matching what test.support feeds in). - if isinstance(source_bytes, str): - return source_bytes - return source_bytes.decode('utf-8') + import tokenize # To avoid bootstrap issues. + source_bytes_readline = _io.BytesIO(source_bytes).readline + encoding = tokenize.detect_encoding(source_bytes_readline) + newline_decoder = _io.IncrementalNewlineDecoder(None, True) + return newline_decoder.decode(source_bytes.decode(encoding[0])) -# CPython: Lib/importlib/_bootstrap_external.py:912 FileLoader -class FileLoader: - """Base file loader class. +# Module specifications ####################################################### - The gopy port skips the readers/finders machinery and keeps only the - file-access shape py_compile needs. - """ +_POPULATE = object() - def __init__(self, fullname, path): - self.name = fullname - self.path = path - def get_filename(self, fullname=None): - if fullname is not None and fullname != self.name: - raise ImportError( - f'loader for {self.name} cannot handle {fullname}', - name=fullname, - ) - return self.path +def spec_from_file_location(name, location=None, *, loader=None, + submodule_search_locations=_POPULATE): + """Return a module spec based on a file location. - def get_data(self, path): - """Return the data from path as raw bytes.""" - with open(path, 'rb') as file: - return file.read() + To indicate that the module is a package, set + submodule_search_locations to a list of directory paths. An + empty list is sufficient, though its not otherwise useful to the + import system. + The loader must take a spec as its only __init__() arg. -# CPython: Lib/importlib/_bootstrap_external.py:962 SourceFileLoader -class SourceFileLoader(FileLoader): - """Concrete loader for source files. Implements the slice of the - SourceLoader / FileLoader contract py_compile.compile() drives: - get_data, get_filename, source_to_code, path_stats. - """ - - # CPython: Lib/importlib/_bootstrap_external.py:818 source_to_code - def source_to_code(self, data, path, *, _optimize=-1): - """Return the code object compiled from source.""" - return compile(data, path, 'exec', - dont_inherit=True, optimize=_optimize) - - # CPython: Lib/importlib/_bootstrap_external.py:966 path_stats - def path_stats(self, path): - st = _os.stat(path) - return {'mtime': st.st_mtime, 'size': st.st_size} - - # CPython: Lib/importlib/_bootstrap_external.py:977 SourceFileLoader.get_code - def get_code(self, fullname=None): - if fullname is None: - fullname = self.name - source = self.get_data(self.get_filename(fullname)) - return self.source_to_code(source, self.path) - - # CPython: Lib/importlib/_bootstrap_external.py:886 SourceLoader.exec_module - def exec_module(self, module): - code = self.get_code(module.__name__) - exec(code, module.__dict__) - - -# CPython: Lib/importlib/_bootstrap_external.py:145 _path_stat -def _path_stat(path): - """Stat the path. - - Made a separate function to make it easier to override in experiments - (e.g. cache stat results). - """ - return _os.stat(path) - - -# CPython: Lib/importlib/_bootstrap_external.py:737 _LoaderBasics -class _LoaderBasics: - """Base class of common code needed by both SourceLoader and - SourcelessFileLoader, and the base class zipimport.zipimporter - derives from.""" - - def is_package(self, fullname): - """Concrete implementation of InspectLoader.is_package by checking if - the path returned by get_filename has a filename of '__init__.py'.""" - filename = _path_split(self.get_filename(fullname))[1] - filename_base = filename.rsplit('.', 1)[0] - tail_name = fullname.rpartition('.')[2] - return filename_base == '__init__' and tail_name != '__init__' - - def create_module(self, spec): - """Use default semantics for module creation.""" - - def exec_module(self, module): - """Execute the module.""" - code = self.get_code(module.__name__) - if code is None: - raise ImportError(f'cannot load module {module.__name__!r} when ' - 'get_code() returns None') - _bootstrap._call_with_frames_removed(exec, code, module.__dict__) - - def load_module(self, fullname): - """This method is deprecated.""" - # Warning implemented in _load_module_shim(). - return _bootstrap._load_module_shim(self, fullname) - - -# CPython: Lib/importlib/_bootstrap_external.py:509 _compile_bytecode -def _compile_bytecode(data, name=None, bytecode_path=None, source_path=None): - """Compile bytecode as found in a pyc.""" - code = marshal.loads(data) - if isinstance(code, _code_type): - _bootstrap._verbose_message('code object from {!r}', bytecode_path) - if source_path is not None: - _imp._fix_co_filename(code, source_path) - return code - else: - raise ImportError(f'Non-code object in {bytecode_path!r}', - name=name, path=bytecode_path) - - -_code_type = type(_compile_bytecode.__code__) - - -# CPython: Lib/importlib/_bootstrap_external.py:1007 SourcelessFileLoader -class SourcelessFileLoader(FileLoader, _LoaderBasics): - """Loader which handles sourceless file imports.""" - - def get_code(self, fullname): - path = self.get_filename(fullname) - data = self.get_data(path) - # Call _classify_pyc to do basic validation of the pyc but ignore the - # result. There's no source to check against. - exc_details = { - 'name': fullname, - 'path': path, - } - _classify_pyc(data, fullname, exc_details) - return _compile_bytecode( - memoryview(data)[16:], - name=fullname, - bytecode_path=path, - ) - - def get_source(self, fullname): - """Return None as there is no source code.""" - return None - - -# CPython: Lib/importlib/_bootstrap_external.py:101 _path_join -def _path_join(*path_parts): - """Replacement for os.path.join().""" - return path_sep.join([part.rstrip(path_separators) - for part in path_parts if part]) - - -# CPython: Lib/importlib/_bootstrap_external.py:107 _path_split -def _path_split(path): - """Replacement for os.path.split().""" - i = max(path.rfind(p) for p in path_separators) - if i < 0: - return '', path - return path[:i], path[i + 1:] - - -# CPython: Lib/importlib/_bootstrap_external.py:202 _path_isabs -def _path_isabs(path): - """Replacement for os.path.isabs.""" - if not path: - return False - return path[0] in path_separators - - -# CPython: Lib/importlib/_bootstrap_external.py:217 _path_abspath -def _path_abspath(path): - """Replacement for os.path.abspath.""" - if not _path_isabs(path): - for sep in path_separators: - path = path.removeprefix(f".{sep}") - return _path_join(_os.getcwd(), path) - else: - return path - - -# A sentinel telling spec_from_file_location to populate -# submodule_search_locations from the loader. -_POPULATE = object() - - -# CPython: Lib/importlib/_bootstrap_external.py:560 spec_from_file_location -def spec_from_file_location(name, location=None, *, loader=None, - submodule_search_locations=_POPULATE): - """Return a module spec based on a file location. - - To indicate that the module is a package, set - submodule_search_locations to a list of directory paths. An - empty list is sufficient, though its not otherwise useful to the - import system. - - The loader must take a spec as its only __init__() arg. """ if location is None: # The caller may simply want a partially populated location- @@ -465,152 +627,461 @@ def spec_from_file_location(name, location=None, *, loader=None, return spec -# CPython: Lib/importlib/_bootstrap_external.py:1534 _get_supported_file_loaders -def _get_supported_file_loaders(): - """Returns a list of file-based module loaders. +def _bless_my_loader(module_globals): + """Helper function for _warnings.c - Each item is a tuple (loader, suffixes). gopy's import system is - Go-side and exposes no extension loader, so the list carries only - the source and sourceless file loaders. + See GH#97850 for details. """ - source = SourceFileLoader, SOURCE_SUFFIXES - bytecode = SourcelessFileLoader, BYTECODE_SUFFIXES - return [source, bytecode] + # 2022-10-06(warsaw): For now, this helper is only used in _warnings.c and + # that use case only has the module globals. This function could be + # extended to accept either that or a module object. However, in the + # latter case, it would be better to raise certain exceptions when looking + # at a module, which should have either a __loader__ or __spec__.loader. + # For backward compatibility, it is possible that we'll get an empty + # dictionary for the module globals, and that cannot raise an exception. + if not isinstance(module_globals, dict): + return None + missing = object() + loader = module_globals.get('__loader__', None) + spec = module_globals.get('__spec__', missing) -# CPython: Lib/importlib/_bootstrap_external.py:1509 _fix_up_module -def _fix_up_module(ns, name, pathname, cpathname=None): - # This function is used by PyImport_ExecCodeModuleObject(). - loader = ns.get('__loader__') - spec = ns.get('__spec__') - if not loader: - if spec: - loader = spec.loader - elif pathname == cpathname: - loader = SourcelessFileLoader(name, pathname) - else: - loader = SourceFileLoader(name, pathname) - if not spec: - spec = spec_from_file_location(name, pathname, loader=loader) - if cpathname: - spec.cached = _path_abspath(cpathname) - try: - ns['__spec__'] = spec - ns['__loader__'] = loader - ns['__file__'] = pathname - ns['__cached__'] = cpathname - except Exception: - # Not important enough to report. - pass + if loader is None: + if spec is missing: + # If working with a module: + # raise AttributeError('Module globals is missing a __spec__') + return None + elif spec is None: + raise ValueError('Module globals is missing a __spec__.loader') + spec_loader = getattr(spec, 'loader', missing) -# CPython: Lib/importlib/_bootstrap_external.py:239 cache_from_source -def cache_from_source(path, debug_override=None, *, optimization=None): - """Given the path to a .py file, return the path to its .pyc file. + if spec_loader in (missing, None): + if loader is None: + exc = AttributeError if spec_loader is missing else ValueError + raise exc('Module globals is missing a __spec__.loader') + _warnings.warn( + 'Module globals is missing a __spec__.loader', + DeprecationWarning) + spec_loader = loader - The .py file does not need to exist; this simply returns the path to the - .pyc file calculated as if the .py file were imported. + assert spec_loader is not None + if loader is not None and loader != spec_loader: + _warnings.warn( + 'Module globals; __loader__ != __spec__.loader', + DeprecationWarning) + return loader - The 'optimization' parameter controls the presumed optimization level of - the bytecode file. If 'optimization' is not None, the string representation - of the argument is taken and verified to be alphanumeric (else ValueError - is raised). + return spec_loader - The debug_override parameter is deprecated. If debug_override is not None, - a True value is the same as setting 'optimization' to the empty string - while a False value is equivalent to setting 'optimization' to '1'. - If sys.implementation.cache_tag is None then NotImplementedError is raised. - """ - if debug_override is not None: - if optimization is not None: - message = 'debug_override or optimization must be set to None' - raise TypeError(message) - optimization = '' if debug_override else 1 - path = _os.fspath(path) - head, tail = _path_split(path) - base, sep, rest = tail.rpartition('.') - tag = sys.implementation.cache_tag - if tag is None: - raise NotImplementedError('sys.implementation.cache_tag is None') - almost_filename = ''.join([(base if base else rest), sep, tag]) - if optimization is None: - if sys.flags.optimize == 0: - optimization = '' +# Loaders ##################################################################### + +class WindowsRegistryFinder: + + """Meta path finder for modules declared in the Windows registry.""" + + REGISTRY_KEY = ( + 'Software\\Python\\PythonCore\\{sys_version}' + '\\Modules\\{fullname}') + REGISTRY_KEY_DEBUG = ( + 'Software\\Python\\PythonCore\\{sys_version}' + '\\Modules\\{fullname}\\Debug') + DEBUG_BUILD = (_MS_WINDOWS and '_d.pyd' in EXTENSION_SUFFIXES) + + @staticmethod + def _open_registry(key): + try: + return winreg.OpenKey(winreg.HKEY_CURRENT_USER, key) + except OSError: + return winreg.OpenKey(winreg.HKEY_LOCAL_MACHINE, key) + + @classmethod + def _search_registry(cls, fullname): + if cls.DEBUG_BUILD: + registry_key = cls.REGISTRY_KEY_DEBUG else: - optimization = sys.flags.optimize - optimization = str(optimization) - if optimization != '': - if not optimization.isalnum(): - raise ValueError(f'{optimization!r} is not alphanumeric') - almost_filename = f'{almost_filename}.{_OPT}{optimization}' - filename = almost_filename + BYTECODE_SUFFIXES[0] - if getattr(sys, 'pycache_prefix', None) is not None: - head = _path_abspath(head) - if head[1:2] == ':' and head[0:1] not in path_separators: - head = head[2:] - return _path_join( - sys.pycache_prefix, - head.lstrip(path_separators), - filename, - ) - return _path_join(head, _PYCACHE, filename) + registry_key = cls.REGISTRY_KEY + key = registry_key.format(fullname=fullname, + sys_version='%d.%d' % sys.version_info[:2]) + try: + with cls._open_registry(key) as hkey: + filepath = winreg.QueryValue(hkey, '') + except OSError: + return None + return filepath + + @classmethod + def find_spec(cls, fullname, path=None, target=None): + _warnings.warn('importlib.machinery.WindowsRegistryFinder is ' + 'deprecated; use site configuration instead. ' + 'Future versions of Python may not enable this ' + 'finder by default.', + DeprecationWarning, stacklevel=2) + + filepath = cls._search_registry(fullname) + if filepath is None: + return None + try: + _path_stat(filepath) + except OSError: + return None + for loader, suffixes in _get_supported_file_loaders(): + if filepath.endswith(tuple(suffixes)): + spec = _bootstrap.spec_from_loader(fullname, + loader(fullname, filepath), + origin=filepath) + return spec -# CPython: Lib/importlib/_bootstrap_external.py:369 _get_cached -def _get_cached(filename): - if filename.endswith(tuple(SOURCE_SUFFIXES)): +class _LoaderBasics: + + """Base class of common code needed by both SourceLoader and + SourcelessFileLoader.""" + + def is_package(self, fullname): + """Concrete implementation of InspectLoader.is_package by checking if + the path returned by get_filename has a filename of '__init__.py'.""" + filename = _path_split(self.get_filename(fullname))[1] + filename_base = filename.rsplit('.', 1)[0] + tail_name = fullname.rpartition('.')[2] + return filename_base == '__init__' and tail_name != '__init__' + + def create_module(self, spec): + """Use default semantics for module creation.""" + + def exec_module(self, module): + """Execute the module.""" + code = self.get_code(module.__name__) + if code is None: + raise ImportError(f'cannot load module {module.__name__!r} when ' + 'get_code() returns None') + _bootstrap._call_with_frames_removed(exec, code, module.__dict__) + + def load_module(self, fullname): + """This method is deprecated.""" + # Warning implemented in _load_module_shim(). + return _bootstrap._load_module_shim(self, fullname) + + +class SourceLoader(_LoaderBasics): + + def path_mtime(self, path): + """Optional method that returns the modification time (an int) for the + specified path (a str). + + Raises OSError when the path cannot be handled. + """ + raise OSError + + def path_stats(self, path): + """Optional method returning a metadata dict for the specified + path (a str). + + Possible keys: + - 'mtime' (mandatory) is the numeric timestamp of last source + code modification; + - 'size' (optional) is the size in bytes of the source code. + + Implementing this method allows the loader to read bytecode files. + Raises OSError when the path cannot be handled. + """ + return {'mtime': self.path_mtime(path)} + + def _cache_bytecode(self, source_path, cache_path, data): + """Optional method which writes data (bytes) to a file path (a str). + + Implementing this method allows for the writing of bytecode files. + + The source path is needed in order to correctly transfer permissions + """ + # For backwards compatibility, we delegate to set_data() + return self.set_data(cache_path, data) + + def set_data(self, path, data): + """Optional method which writes data (bytes) to a file path (a str). + + Implementing this method allows for the writing of bytecode files. + """ + + + def get_source(self, fullname): + """Concrete implementation of InspectLoader.get_source.""" + path = self.get_filename(fullname) try: - return cache_from_source(filename) + source_bytes = self.get_data(path) + except OSError as exc: + raise ImportError('source not available through get_data()', + name=fullname) from exc + return decode_source(source_bytes) + + def source_to_code(self, data, path, *, _optimize=-1): + """Return the code object compiled from source. + + The 'data' argument can be any object type that compile() supports. + """ + return _bootstrap._call_with_frames_removed(compile, data, path, 'exec', + dont_inherit=True, optimize=_optimize) + + def get_code(self, fullname): + """Concrete implementation of InspectLoader.get_code. + + Reading of bytecode requires path_stats to be implemented. To write + bytecode, set_data must also be implemented. + + """ + source_path = self.get_filename(fullname) + source_mtime = None + source_bytes = None + source_hash = None + hash_based = False + check_source = True + try: + bytecode_path = cache_from_source(source_path) except NotImplementedError: - pass - elif filename.endswith(tuple(BYTECODE_SUFFIXES)): - return filename - else: + bytecode_path = None + else: + try: + st = self.path_stats(source_path) + except OSError: + pass + else: + source_mtime = int(st['mtime']) + try: + data = self.get_data(bytecode_path) + except OSError: + pass + else: + exc_details = { + 'name': fullname, + 'path': bytecode_path, + } + try: + flags = _classify_pyc(data, fullname, exc_details) + bytes_data = memoryview(data)[16:] + hash_based = flags & 0b1 != 0 + if hash_based: + check_source = flags & 0b10 != 0 + if (_imp.check_hash_based_pycs != 'never' and + (check_source or + _imp.check_hash_based_pycs == 'always')): + source_bytes = self.get_data(source_path) + source_hash = _imp.source_hash( + _imp.pyc_magic_number_token, + source_bytes, + ) + _validate_hash_pyc(data, source_hash, fullname, + exc_details) + else: + _validate_timestamp_pyc( + data, + source_mtime, + st['size'], + fullname, + exc_details, + ) + except (ImportError, EOFError): + pass + else: + _bootstrap._verbose_message('{} matches {}', bytecode_path, + source_path) + return _compile_bytecode(bytes_data, name=fullname, + bytecode_path=bytecode_path, + source_path=source_path) + if source_bytes is None: + source_bytes = self.get_data(source_path) + code_object = self.source_to_code(source_bytes, source_path) + _bootstrap._verbose_message('code object from {}', source_path) + if (not sys.dont_write_bytecode and bytecode_path is not None and + source_mtime is not None): + if hash_based: + if source_hash is None: + source_hash = _imp.source_hash(_imp.pyc_magic_number_token, + source_bytes) + data = _code_to_hash_pyc(code_object, source_hash, check_source) + else: + data = _code_to_timestamp_pyc(code_object, source_mtime, + len(source_bytes)) + try: + self._cache_bytecode(source_path, bytecode_path, data) + except NotImplementedError: + pass + return code_object + + +class FileLoader: + + """Base file loader class which implements the loader protocol methods that + require file system usage.""" + + def __init__(self, fullname, path): + """Cache the module name and the path to the file found by the + finder.""" + self.name = fullname + self.path = path + + def __eq__(self, other): + return (self.__class__ == other.__class__ and + self.__dict__ == other.__dict__) + + def __hash__(self): + return hash(self.name) ^ hash(self.path) + + @_check_name + def load_module(self, fullname): + """Load a module from a file. + + This method is deprecated. Use exec_module() instead. + + """ + # The only reason for this method is for the name check. + # Issue #14857: Avoid the zero-argument form of super so the implementation + # of that form can be updated without breaking the frozen module. + return super(FileLoader, self).load_module(fullname) + + @_check_name + def get_filename(self, fullname): + """Return the path to the source file as found by the finder.""" + return self.path + + def get_data(self, path): + """Return the data from path as raw bytes.""" + if isinstance(self, (SourceLoader, SourcelessFileLoader, ExtensionFileLoader)): + with _io.open_code(str(path)) as file: + return file.read() + else: + with _io.FileIO(path, 'r') as file: + return file.read() + + @_check_name + def get_resource_reader(self, module): + from importlib.readers import FileReader + return FileReader(self) + + +class SourceFileLoader(FileLoader, SourceLoader): + + """Concrete implementation of SourceLoader using the file system.""" + + def path_stats(self, path): + """Return the metadata for the path.""" + st = _path_stat(path) + return {'mtime': st.st_mtime, 'size': st.st_size} + + def _cache_bytecode(self, source_path, bytecode_path, data): + # Adapt between the two APIs + mode = _calc_mode(source_path) + return self.set_data(bytecode_path, data, _mode=mode) + + def set_data(self, path, data, *, _mode=0o666): + """Write bytes data to a file.""" + parent, filename = _path_split(path) + path_parts = [] + # Figure out what directories are missing. + while parent and not _path_isdir(parent): + parent, part = _path_split(parent) + path_parts.append(part) + # Create needed directories. + for part in reversed(path_parts): + parent = _path_join(parent, part) + try: + _os.mkdir(parent) + except FileExistsError: + # Probably another Python process already created the dir. + continue + except OSError as exc: + # Could be a permission error, read-only filesystem: just forget + # about writing the data. + _bootstrap._verbose_message('could not create {!r}: {!r}', + parent, exc) + return + try: + _write_atomic(path, data, _mode) + _bootstrap._verbose_message('created {!r}', path) + except OSError as exc: + # Same as above: just don't write the bytecode. + _bootstrap._verbose_message('could not create {!r}: {!r}', path, + exc) + + +class SourcelessFileLoader(FileLoader, _LoaderBasics): + + """Loader which handles sourceless file imports.""" + + def get_code(self, fullname): + path = self.get_filename(fullname) + data = self.get_data(path) + # Call _classify_pyc to do basic validation of the pyc but ignore the + # result. There's no source to check against. + exc_details = { + 'name': fullname, + 'path': path, + } + _classify_pyc(data, fullname, exc_details) + return _compile_bytecode( + memoryview(data)[16:], + name=fullname, + bytecode_path=path, + ) + + def get_source(self, fullname): + """Return None as there is no source code.""" return None -# CPython: Lib/importlib/_bootstrap_external.py:310 source_from_cache -def source_from_cache(path): - """Given the path to a .pyc. file, return the path to its .py file. +class ExtensionFileLoader(FileLoader, _LoaderBasics): + + """Loader for extension modules. + + The constructor is designed to work with FileFinder. - The .pyc file does not need to exist; this simply returns the path to - the .py file calculated to correspond to the .pyc file. If path does - not conform to PEP 3147/488 format, ValueError will be raised. If - sys.implementation.cache_tag is None then NotImplementedError is raised. """ - if sys.implementation.cache_tag is None: - raise NotImplementedError('sys.implementation.cache_tag is None') - path = _os.fspath(path) - head, pycache_filename = _path_split(path) - found_in_pycache_prefix = False - if getattr(sys, 'pycache_prefix', None) is not None: - stripped_path = sys.pycache_prefix.rstrip(path_separators) - if head.startswith(stripped_path + path_sep): - head = head[len(stripped_path):] - found_in_pycache_prefix = True - if not found_in_pycache_prefix: - head, pycache = _path_split(head) - if pycache != _PYCACHE: - raise ValueError(f'{_PYCACHE} not bottom-level directory in ' - f'{path!r}') - dot_count = pycache_filename.count('.') - if dot_count not in {2, 3}: - raise ValueError(f'expected only 2 or 3 dots in {pycache_filename!r}') - elif dot_count == 3: - optimization = pycache_filename.rsplit('.', 2)[-2] - if not optimization.startswith(_OPT): - raise ValueError("optimization portion of filename does not start " - f"with {_OPT!r}") - opt_level = optimization[len(_OPT):] - if not opt_level.isalnum(): - raise ValueError(f"optimization level {opt_level!r} is not an " - "alphanumeric value") - base_filename = pycache_filename.partition('.')[0] - return _path_join(head, base_filename + SOURCE_SUFFIXES[0]) + + def __init__(self, name, path): + self.name = name + self.path = path + + def __eq__(self, other): + return (self.__class__ == other.__class__ and + self.__dict__ == other.__dict__) + + def __hash__(self): + return hash(self.name) ^ hash(self.path) + + def create_module(self, spec): + """Create an uninitialized extension module""" + module = _bootstrap._call_with_frames_removed( + _imp.create_dynamic, spec) + _bootstrap._verbose_message('extension module {!r} loaded from {!r}', + spec.name, self.path) + return module + + def exec_module(self, module): + """Initialize an extension module""" + _bootstrap._call_with_frames_removed(_imp.exec_dynamic, module) + _bootstrap._verbose_message('extension module {!r} executed from {!r}', + self.name, self.path) + + def is_package(self, fullname): + """Return True if the extension module is a package.""" + file_name = _path_split(self.path)[1] + return any(file_name == '__init__' + suffix + for suffix in EXTENSION_SUFFIXES) + + def get_code(self, fullname): + """Return None as an extension module cannot create a code object.""" + return None + + def get_source(self, fullname): + """Return None as extension modules have no source code.""" + return None + + @_check_name + def get_filename(self, fullname): + """Return the path to the source file as found by the finder.""" + return self.path -# CPython: Lib/importlib/_bootstrap_external.py:1085 _NamespacePath class _NamespacePath: """Represents a namespace package's path. It uses the module name to find its parent module, and from there it looks up the parent's @@ -645,7 +1116,7 @@ def _get_parent_path(self): def _recalculate(self): # If the parent's path has changed, recalculate _path - parent_path = tuple(self._get_parent_path()) # Make a copy + parent_path = tuple(self._get_parent_path()) # Make a copy if parent_path != self._last_parent_path or self._epoch != self._last_epoch: spec = self._path_finder(self._name, parent_path) # Note that no changes are made if a loader is returned, but we @@ -682,7 +1153,6 @@ def append(self, item): # This class is actually exposed publicly in a namespace package's __loader__ # attribute, so it should be available through a non-private name. # https://github.com/python/cpython/issues/92054 -# CPython: Lib/importlib/_bootstrap_external.py:1156 NamespaceLoader class NamespaceLoader: def __init__(self, name, path, path_finder): self._path = _NamespacePath(name, path, path_finder) @@ -723,12 +1193,370 @@ def get_resource_reader(self, module): _NamespaceLoader = NamespaceLoader -# CPython wires this module into _bootstrap during -# _install_external_importers (_bootstrap_external = _frozen_importlib_external). -# gopy imports the bootstrap modules normally and never runs that install, -# so publish ourselves to _bootstrap here. This is what lets -# _bootstrap.spec_from_loader reach spec_from_file_location and lets -# _module_repr_from_spec recognise NamespaceLoader. -# -# CPython: Lib/importlib/_bootstrap.py:1565 _install_external_importers -_bootstrap._bootstrap_external = sys.modules[__name__] +# Finders ##################################################################### + +class PathFinder: + + """Meta path finder for sys.path and package __path__ attributes.""" + + @staticmethod + def invalidate_caches(): + """Call the invalidate_caches() method on all path entry finders + stored in sys.path_importer_cache (where implemented).""" + for name, finder in list(sys.path_importer_cache.items()): + # Drop entry if finder name is a relative path. The current + # working directory may have changed. + if finder is None or not _path_isabs(name): + del sys.path_importer_cache[name] + elif hasattr(finder, 'invalidate_caches'): + finder.invalidate_caches() + # Also invalidate the caches of _NamespacePaths + # https://bugs.python.org/issue45703 + _NamespacePath._epoch += 1 + + from importlib.metadata import MetadataPathFinder + MetadataPathFinder.invalidate_caches() + + @staticmethod + def _path_hooks(path): + """Search sys.path_hooks for a finder for 'path'.""" + if sys.path_hooks is not None and not sys.path_hooks: + _warnings.warn('sys.path_hooks is empty', ImportWarning) + for hook in sys.path_hooks: + try: + return hook(path) + except ImportError: + continue + else: + return None + + @classmethod + def _path_importer_cache(cls, path): + """Get the finder for the path entry from sys.path_importer_cache. + + If the path entry is not in the cache, find the appropriate finder + and cache it. If no finder is available, store None. + + """ + if path == '': + try: + path = _os.getcwd() + except (FileNotFoundError, PermissionError): + # Don't cache the failure as the cwd can easily change to + # a valid directory later on. + return None + try: + finder = sys.path_importer_cache[path] + except KeyError: + finder = cls._path_hooks(path) + sys.path_importer_cache[path] = finder + return finder + + @classmethod + def _get_spec(cls, fullname, path, target=None): + """Find the loader or namespace_path for this module/package name.""" + # If this ends up being a namespace package, namespace_path is + # the list of paths that will become its __path__ + namespace_path = [] + for entry in path: + if not isinstance(entry, str): + continue + finder = cls._path_importer_cache(entry) + if finder is not None: + spec = finder.find_spec(fullname, target) + if spec is None: + continue + if spec.loader is not None: + return spec + portions = spec.submodule_search_locations + if portions is None: + raise ImportError('spec missing loader') + # This is possibly part of a namespace package. + # Remember these path entries (if any) for when we + # create a namespace package, and continue iterating + # on path. + namespace_path.extend(portions) + else: + spec = _bootstrap.ModuleSpec(fullname, None) + spec.submodule_search_locations = namespace_path + return spec + + @classmethod + def find_spec(cls, fullname, path=None, target=None): + """Try to find a spec for 'fullname' on sys.path or 'path'. + + The search is based on sys.path_hooks and sys.path_importer_cache. + """ + if path is None: + path = sys.path + spec = cls._get_spec(fullname, path, target) + if spec is None: + return None + elif spec.loader is None: + namespace_path = spec.submodule_search_locations + if namespace_path: + # We found at least one namespace path. Return a spec which + # can create the namespace package. + spec.origin = None + spec.submodule_search_locations = _NamespacePath(fullname, namespace_path, cls._get_spec) + return spec + else: + return None + else: + return spec + + @staticmethod + def find_distributions(*args, **kwargs): + """ + Find distributions. + + Return an iterable of all Distribution instances capable of + loading the metadata for packages matching ``context.name`` + (or all names if ``None`` indicated) along the paths in the list + of directories ``context.path``. + """ + from importlib.metadata import MetadataPathFinder + return MetadataPathFinder.find_distributions(*args, **kwargs) + + +class FileFinder: + + """File-based finder. + + Interactions with the file system are cached for performance, being + refreshed when the directory the finder is handling has been modified. + + """ + + def __init__(self, path, *loader_details): + """Initialize with the path to search on and a variable number of + 2-tuples containing the loader and the file suffixes the loader + recognizes.""" + loaders = [] + for loader, suffixes in loader_details: + loaders.extend((suffix, loader) for suffix in suffixes) + self._loaders = loaders + # Base (directory) path + if not path or path == '.': + self.path = _os.getcwd() + else: + self.path = _path_abspath(path) + self._path_mtime = -1 + self._path_cache = set() + self._relaxed_path_cache = set() + + def invalidate_caches(self): + """Invalidate the directory mtime.""" + self._path_mtime = -1 + + def _get_spec(self, loader_class, fullname, path, smsl, target): + loader = loader_class(fullname, path) + return spec_from_file_location(fullname, path, loader=loader, + submodule_search_locations=smsl) + + def find_spec(self, fullname, target=None): + """Try to find a spec for the specified module. + + Returns the matching spec, or None if not found. + """ + is_namespace = False + tail_module = fullname.rpartition('.')[2] + try: + mtime = _path_stat(self.path or _os.getcwd()).st_mtime + except OSError: + mtime = -1 + if mtime != self._path_mtime: + self._fill_cache() + self._path_mtime = mtime + # tail_module keeps the original casing, for __file__ and friends + if _relax_case(): + cache = self._relaxed_path_cache + cache_module = tail_module.lower() + else: + cache = self._path_cache + cache_module = tail_module + # Check if the module is the name of a directory (and thus a package). + if cache_module in cache: + base_path = _path_join(self.path, tail_module) + for suffix, loader_class in self._loaders: + init_filename = '__init__' + suffix + full_path = _path_join(base_path, init_filename) + if _path_isfile(full_path): + return self._get_spec(loader_class, fullname, full_path, [base_path], target) + else: + # If a namespace package, return the path if we don't + # find a module in the next section. + is_namespace = _path_isdir(base_path) + # Check for a file w/ a proper suffix exists. + for suffix, loader_class in self._loaders: + try: + full_path = _path_join(self.path, tail_module + suffix) + except ValueError: + return None + _bootstrap._verbose_message('trying {}', full_path, verbosity=2) + if cache_module + suffix in cache: + if _path_isfile(full_path): + return self._get_spec(loader_class, fullname, full_path, + None, target) + if is_namespace: + _bootstrap._verbose_message('possible namespace for {}', base_path) + spec = _bootstrap.ModuleSpec(fullname, None) + spec.submodule_search_locations = [base_path] + return spec + return None + + def _fill_cache(self): + """Fill the cache of potential modules and packages for this directory.""" + path = self.path + try: + contents = _os.listdir(path or _os.getcwd()) + except (FileNotFoundError, PermissionError, NotADirectoryError): + # Directory has either been removed, turned into a file, or made + # unreadable. + contents = [] + # We store two cached versions, to handle runtime changes of the + # PYTHONCASEOK environment variable. + if not sys.platform.startswith('win'): + self._path_cache = set(contents) + else: + # Windows users can import modules with case-insensitive file + # suffixes (for legacy reasons). Make the suffix lowercase here + # so it's done once instead of for every import. This is safe as + # the specified suffixes to check against are always specified in a + # case-sensitive manner. + lower_suffix_contents = set() + for item in contents: + name, dot, suffix = item.partition('.') + if dot: + new_name = f'{name}.{suffix.lower()}' + else: + new_name = name + lower_suffix_contents.add(new_name) + self._path_cache = lower_suffix_contents + if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS): + self._relaxed_path_cache = {fn.lower() for fn in contents} + + @classmethod + def path_hook(cls, *loader_details): + """A class method which returns a closure to use on sys.path_hook + which will return an instance using the specified loaders and the path + called on the closure. + + If the path called on the closure is not a directory, ImportError is + raised. + + """ + def path_hook_for_FileFinder(path): + """Path hook for importlib.machinery.FileFinder.""" + if not _path_isdir(path): + raise ImportError('only directories are supported', path=path) + return cls(path, *loader_details) + + return path_hook_for_FileFinder + + def __repr__(self): + return f'FileFinder({self.path!r})' + + +class AppleFrameworkLoader(ExtensionFileLoader): + """A loader for modules that have been packaged as frameworks for + compatibility with Apple's iOS App Store policies. + """ + def create_module(self, spec): + # If the ModuleSpec has been created by the FileFinder, it will have + # been created with an origin pointing to the .fwork file. We need to + # redirect this to the location in the Frameworks folder, using the + # content of the .fwork file. + if spec.origin.endswith(".fwork"): + with _io.FileIO(spec.origin, 'r') as file: + framework_binary = file.read().decode().strip() + bundle_path = _path_split(sys.executable)[0] + spec.origin = _path_join(bundle_path, framework_binary) + + # If the loader is created based on the spec for a loaded module, the + # path will be pointing at the Framework location. If this occurs, + # get the original .fwork location to use as the module's __file__. + if self.path.endswith(".fwork"): + path = self.path + else: + with _io.FileIO(self.path + ".origin", 'r') as file: + origin = file.read().decode().strip() + bundle_path = _path_split(sys.executable)[0] + path = _path_join(bundle_path, origin) + + module = _bootstrap._call_with_frames_removed(_imp.create_dynamic, spec) + + _bootstrap._verbose_message( + "Apple framework extension module {!r} loaded from {!r} (path {!r})", + spec.name, + spec.origin, + path, + ) + + # Ensure that the __file__ points at the .fwork location + try: + module.__file__ = path + except AttributeError: + # Not important enough to report. + # (The error is also ignored in _bootstrap._init_module_attrs or + # import_run_extension in import.c) + pass + + return module + +# Import setup ############################################################### + +def _fix_up_module(ns, name, pathname, cpathname=None): + # This function is used by PyImport_ExecCodeModuleObject(). + loader = ns.get('__loader__') + spec = ns.get('__spec__') + if not loader: + if spec: + loader = spec.loader + elif pathname == cpathname: + loader = SourcelessFileLoader(name, pathname) + else: + loader = SourceFileLoader(name, pathname) + if not spec: + spec = spec_from_file_location(name, pathname, loader=loader) + if cpathname: + spec.cached = _path_abspath(cpathname) + try: + ns['__spec__'] = spec + ns['__loader__'] = loader + ns['__file__'] = pathname + ns['__cached__'] = cpathname + except Exception: + # Not important enough to report. + pass + + +def _get_supported_file_loaders(): + """Returns a list of file-based module loaders. + + Each item is a tuple (loader, suffixes). + """ + extension_loaders = [] + if hasattr(_imp, 'create_dynamic'): + if sys.platform in {"ios", "tvos", "watchos"}: + extension_loaders = [(AppleFrameworkLoader, [ + suffix.replace(".so", ".fwork") + for suffix in _imp.extension_suffixes() + ])] + extension_loaders.append((ExtensionFileLoader, _imp.extension_suffixes())) + source = SourceFileLoader, SOURCE_SUFFIXES + bytecode = SourcelessFileLoader, BYTECODE_SUFFIXES + return extension_loaders + [source, bytecode] + + +def _set_bootstrap_module(_bootstrap_module): + global _bootstrap + _bootstrap = _bootstrap_module + + +def _install(_bootstrap_module): + """Install the path-based import components.""" + _set_bootstrap_module(_bootstrap_module) + supported_loaders = _get_supported_file_loaders() + sys.path_hooks.extend([FileFinder.path_hook(*supported_loaders)]) + sys.meta_path.append(PathFinder) diff --git a/stdlib/importlib/abc.py b/stdlib/importlib/abc.py new file mode 100644 index 00000000..1e47495f --- /dev/null +++ b/stdlib/importlib/abc.py @@ -0,0 +1,234 @@ +"""Abstract base classes related to import.""" +from . import _bootstrap_external +from . import machinery +try: + import _frozen_importlib +except ImportError as exc: + if exc.name != '_frozen_importlib': + raise + _frozen_importlib = None +try: + import _frozen_importlib_external +except ImportError: + _frozen_importlib_external = _bootstrap_external +from ._abc import Loader +import abc + + +__all__ = [ + 'Loader', 'MetaPathFinder', 'PathEntryFinder', + 'ResourceLoader', 'InspectLoader', 'ExecutionLoader', + 'FileLoader', 'SourceLoader', +] + + +def _register(abstract_cls, *classes): + for cls in classes: + abstract_cls.register(cls) + if _frozen_importlib is not None: + try: + frozen_cls = getattr(_frozen_importlib, cls.__name__) + except AttributeError: + frozen_cls = getattr(_frozen_importlib_external, cls.__name__) + abstract_cls.register(frozen_cls) + + +class MetaPathFinder(metaclass=abc.ABCMeta): + + """Abstract base class for import finders on sys.meta_path.""" + + # We don't define find_spec() here since that would break + # hasattr checks we do to support backward compatibility. + + def invalidate_caches(self): + """An optional method for clearing the finder's cache, if any. + This method is used by importlib.invalidate_caches(). + """ + +_register(MetaPathFinder, machinery.BuiltinImporter, machinery.FrozenImporter, + machinery.PathFinder, machinery.WindowsRegistryFinder) + + +class PathEntryFinder(metaclass=abc.ABCMeta): + + """Abstract base class for path entry finders used by PathFinder.""" + + def invalidate_caches(self): + """An optional method for clearing the finder's cache, if any. + This method is used by PathFinder.invalidate_caches(). + """ + +_register(PathEntryFinder, machinery.FileFinder) + + +class ResourceLoader(Loader): + + """Abstract base class for loaders which can return data from their + back-end storage to facilitate reading data to perform an import. + + This ABC represents one of the optional protocols specified by PEP 302. + + For directly loading resources, use TraversableResources instead. This class + primarily exists for backwards compatibility with other ABCs in this module. + + """ + + @abc.abstractmethod + def get_data(self, path): + """Abstract method which when implemented should return the bytes for + the specified path. The path must be a str.""" + raise OSError + + +class InspectLoader(Loader): + + """Abstract base class for loaders which support inspection about the + modules they can load. + + This ABC represents one of the optional protocols specified by PEP 302. + + """ + + def is_package(self, fullname): + """Optional method which when implemented should return whether the + module is a package. The fullname is a str. Returns a bool. + + Raises ImportError if the module cannot be found. + """ + raise ImportError + + def get_code(self, fullname): + """Method which returns the code object for the module. + + The fullname is a str. Returns a types.CodeType if possible, else + returns None if a code object does not make sense + (e.g. built-in module). Raises ImportError if the module cannot be + found. + """ + source = self.get_source(fullname) + if source is None: + return None + return self.source_to_code(source) + + @abc.abstractmethod + def get_source(self, fullname): + """Abstract method which should return the source code for the + module. The fullname is a str. Returns a str. + + Raises ImportError if the module cannot be found. + """ + raise ImportError + + @staticmethod + def source_to_code(data, path=''): + """Compile 'data' into a code object. + + The 'data' argument can be anything that compile() can handle. The'path' + argument should be where the data was retrieved (when applicable).""" + return compile(data, path, 'exec', dont_inherit=True) + + exec_module = _bootstrap_external._LoaderBasics.exec_module + load_module = _bootstrap_external._LoaderBasics.load_module + +_register(InspectLoader, machinery.BuiltinImporter, machinery.FrozenImporter, machinery.NamespaceLoader) + + +class ExecutionLoader(InspectLoader): + + """Abstract base class for loaders that wish to support the execution of + modules as scripts. + + This ABC represents one of the optional protocols specified in PEP 302. + + """ + + @abc.abstractmethod + def get_filename(self, fullname): + """Abstract method which should return the value that __file__ is to be + set to. + + Raises ImportError if the module cannot be found. + """ + raise ImportError + + def get_code(self, fullname): + """Method to return the code object for fullname. + + Should return None if not applicable (e.g. built-in module). + Raise ImportError if the module cannot be found. + """ + source = self.get_source(fullname) + if source is None: + return None + try: + path = self.get_filename(fullname) + except ImportError: + return self.source_to_code(source) + else: + return self.source_to_code(source, path) + +_register( + ExecutionLoader, + machinery.ExtensionFileLoader, + machinery.AppleFrameworkLoader, +) + + +class FileLoader(_bootstrap_external.FileLoader, ResourceLoader, ExecutionLoader): + + """Abstract base class partially implementing the ResourceLoader and + ExecutionLoader ABCs.""" + +_register(FileLoader, machinery.SourceFileLoader, + machinery.SourcelessFileLoader) + + +class SourceLoader(_bootstrap_external.SourceLoader, ResourceLoader, ExecutionLoader): + + """Abstract base class for loading source code (and optionally any + corresponding bytecode). + + To support loading from source code, the abstractmethods inherited from + ResourceLoader and ExecutionLoader need to be implemented. To also support + loading from bytecode, the optional methods specified directly by this ABC + is required. + + Inherited abstractmethods not implemented in this ABC: + + * ResourceLoader.get_data + * ExecutionLoader.get_filename + + """ + + def path_mtime(self, path): + """Return the (int) modification time for the path (str).""" + import warnings + warnings.warn('SourceLoader.path_mtime is deprecated in favour of ' + 'SourceLoader.path_stats().', + DeprecationWarning, stacklevel=2) + if self.path_stats.__func__ is SourceLoader.path_stats: + raise OSError + return int(self.path_stats(path)['mtime']) + + def path_stats(self, path): + """Return a metadata dict for the source pointed to by the path (str). + Possible keys: + - 'mtime' (mandatory) is the numeric timestamp of last source + code modification; + - 'size' (optional) is the size in bytes of the source code. + """ + if self.path_mtime.__func__ is SourceLoader.path_mtime: + raise OSError + return {'mtime': self.path_mtime(path)} + + def set_data(self, path, data): + """Write the bytes to the path (if possible). + + Accepts a str path and data as bytes. + + Any needed intermediary directories are to be created. If for some + reason the file cannot be written because of permissions, fail + silently. + """ + +_register(SourceLoader, machinery.SourceFileLoader) diff --git a/stdlib/importlib/machinery.py b/stdlib/importlib/machinery.py index ce460f75..63d72644 100644 --- a/stdlib/importlib/machinery.py +++ b/stdlib/importlib/machinery.py @@ -1,186 +1,50 @@ -"""importlib.machinery: gopy-side stub. - -The CPython module re-exports loader / finder classes plus suffix -constants from ._bootstrap and ._bootstrap_external. gopy's import -system is implemented Go-side, so most loaders and finders aren't -needed at the Python boundary; the SourceFileLoader re-export is -necessary because py_compile.compile() drives it directly. - -When a future spec lands the full importlib bootstrap port, this file -becomes the byte-equal vendor of Lib/importlib/machinery.py. - -CPython: Lib/importlib/machinery.py -""" - -from importlib._bootstrap_external import ( - FileLoader, - NamespaceLoader, - SourceFileLoader, +"""The machinery of importlib: finders, loaders, hooks, etc.""" + +from ._bootstrap import ModuleSpec +from ._bootstrap import BuiltinImporter +from ._bootstrap import FrozenImporter +from ._bootstrap_external import ( + SOURCE_SUFFIXES, BYTECODE_SUFFIXES, EXTENSION_SUFFIXES, + DEBUG_BYTECODE_SUFFIXES as _DEBUG_BYTECODE_SUFFIXES, + OPTIMIZED_BYTECODE_SUFFIXES as _OPTIMIZED_BYTECODE_SUFFIXES ) - -SOURCE_SUFFIXES = ['.py'] -DEBUG_BYTECODE_SUFFIXES = ['.pyc'] -OPTIMIZED_BYTECODE_SUFFIXES = ['.pyc'] -BYTECODE_SUFFIXES = DEBUG_BYTECODE_SUFFIXES -EXTENSION_SUFFIXES = [] +from ._bootstrap_external import WindowsRegistryFinder +from ._bootstrap_external import PathFinder +from ._bootstrap_external import FileFinder +from ._bootstrap_external import SourceFileLoader +from ._bootstrap_external import SourcelessFileLoader +from ._bootstrap_external import ExtensionFileLoader +from ._bootstrap_external import AppleFrameworkLoader +from ._bootstrap_external import NamespaceLoader def all_suffixes(): - """Returns a list of all recognized module suffixes for this process.""" + """Returns a list of all recognized module suffixes for this process""" return SOURCE_SUFFIXES + BYTECODE_SUFFIXES + EXTENSION_SUFFIXES -class FileFinder: - """File-based finder for a single directory. - - gopy's import statement is resolved Go-side, so FileFinder is not on - the meta-path. It still has to exist as a sys.path_hooks entry: - pkgutil.get_importer / runpy.run_path call the hook on a path item - and treat a non-None result as "this is an importable directory". - The find_spec scan mirrors CPython closely enough for pkgutil's - iter_modules / walk_packages to enumerate a directory's contents. - - CPython: Lib/importlib/_bootstrap_external.py:1322 FileFinder - """ - - def __init__(self, path, *loader_details): - self.path = path or '.' - self._loaders = loader_details - - def find_spec(self, name, target=None): - """Scan self.path for name's tail and build a spec, or None. - - CPython: Lib/importlib/_bootstrap_external.py:1403 FileFinder.find_spec - """ - import importlib.util as _util - return _util._spec_from_search(name, [self.path]) - - @classmethod - def path_hook(cls, *loader_details): - """Return a closure that builds a FileFinder for a directory. - - Raises ImportError for non-directory path items so get_importer - falls through to the next hook (or None), exactly like CPython. - - CPython: Lib/importlib/_bootstrap_external.py:1467 FileFinder.path_hook - """ - def path_hook_for_FileFinder(path): - import os - if not os.path.isdir(path): - raise ImportError('only directories are supported', path=path) - return cls(path, *loader_details) - return path_hook_for_FileFinder - - -class ModuleSpec: - """The specification for a module, used for loading. - - A faithful port of importlib._bootstrap.ModuleSpec. CPython defines - the class in _bootstrap and re-exports it through machinery; gopy's - bootstrap is Go-side, so the class lives here and importlib.util - imports it from machinery. - - CPython: Lib/importlib/_bootstrap.py:565 ModuleSpec - """ - - def __init__(self, name, loader, *, origin=None, loader_state=None, - is_package=None): - self.name = name - self.loader = loader - self.origin = origin - self.loader_state = loader_state - self.submodule_search_locations = [] if is_package else None - self._uninitialized_submodules = [] - - # file-location attributes - self._set_fileattr = False - self._cached = None - - def __repr__(self): - args = [f'name={self.name!r}', f'loader={self.loader!r}'] - if self.origin is not None: - args.append(f'origin={self.origin!r}') - if self.submodule_search_locations is not None: - args.append(f'submodule_search_locations={self.submodule_search_locations}') - return f'{self.__class__.__name__}({", ".join(args)})' - - def __eq__(self, other): - smsl = self.submodule_search_locations - try: - return (self.name == other.name and - self.loader == other.loader and - self.origin == other.origin and - smsl == other.submodule_search_locations and - self.cached == other.cached and - self.has_location == other.has_location) - except AttributeError: - return NotImplemented - - @property - def cached(self): - if self._cached is None: - if self.origin is not None and self._set_fileattr: - from importlib import _bootstrap_external - self._cached = _bootstrap_external._get_cached(self.origin) - return self._cached - - @cached.setter - def cached(self, cached): - self._cached = cached - - @property - def parent(self): - """The name of the module's parent.""" - if self.submodule_search_locations is None: - return self.name.rpartition('.')[0] - else: - return self.name - - @property - def has_location(self): - return self._set_fileattr - - @has_location.setter - def has_location(self, value): - self._set_fileattr = bool(value) - - -# Install the file-finder path hook so pkgutil.get_importer and -# runpy.run_path recognise directories on sys.path. CPython does this in -# _bootstrap_external._install; gopy's bootstrap is Go-side, so the hook -# is registered when machinery is first imported. -# -# CPython: Lib/importlib/_bootstrap_external.py:1648 _install (path_hooks) -def _install_path_hooks(): - import sys - if getattr(sys, '_gopy_file_finder_installed', False): - return - # CPython orders the path hooks zipimport.zipimporter first, then the - # FileFinder hook, so a sys.path entry pointing at a zip archive is - # claimed by zipimport before the directory finder rejects it. - # - # CPython: Lib/importlib/_bootstrap_external.py:1648 _install (path_hooks) - try: - import zipimport - sys.path_hooks.append(zipimport.zipimporter) - except ImportError: - pass - _loader_details = (SourceFileLoader, SOURCE_SUFFIXES) - sys.path_hooks.append(FileFinder.path_hook(_loader_details)) - sys._gopy_file_finder_installed = True +__all__ = ['AppleFrameworkLoader', 'BYTECODE_SUFFIXES', 'BuiltinImporter', + 'DEBUG_BYTECODE_SUFFIXES', 'EXTENSION_SUFFIXES', + 'ExtensionFileLoader', 'FileFinder', 'FrozenImporter', 'ModuleSpec', + 'NamespaceLoader', 'OPTIMIZED_BYTECODE_SUFFIXES', 'PathFinder', + 'SOURCE_SUFFIXES', 'SourceFileLoader', 'SourcelessFileLoader', + 'WindowsRegistryFinder', 'all_suffixes'] -_install_path_hooks() +def __getattr__(name): + import warnings + if name == 'DEBUG_BYTECODE_SUFFIXES': + warnings.warn('importlib.machinery.DEBUG_BYTECODE_SUFFIXES is ' + 'deprecated; use importlib.machinery.BYTECODE_SUFFIXES ' + 'instead.', + DeprecationWarning, stacklevel=2) + return _DEBUG_BYTECODE_SUFFIXES + elif name == 'OPTIMIZED_BYTECODE_SUFFIXES': + warnings.warn('importlib.machinery.OPTIMIZED_BYTECODE_SUFFIXES is ' + 'deprecated; use importlib.machinery.BYTECODE_SUFFIXES ' + 'instead.', + DeprecationWarning, stacklevel=2) + return _OPTIMIZED_BYTECODE_SUFFIXES -__all__ = [ - 'BYTECODE_SUFFIXES', - 'DEBUG_BYTECODE_SUFFIXES', - 'EXTENSION_SUFFIXES', - 'FileLoader', - 'ModuleSpec', - 'OPTIMIZED_BYTECODE_SUFFIXES', - 'SOURCE_SUFFIXES', - 'SourceFileLoader', - 'all_suffixes', -] + raise AttributeError(f'module {__name__!r} has no attribute {name!r}') diff --git a/stdlib/importlib/metadata/__init__.py b/stdlib/importlib/metadata/__init__.py new file mode 100644 index 00000000..8ce62dd8 --- /dev/null +++ b/stdlib/importlib/metadata/__init__.py @@ -0,0 +1,1093 @@ +from __future__ import annotations + +import os +import re +import abc +import sys +import json +import email +import types +import inspect +import pathlib +import zipfile +import operator +import textwrap +import warnings +import functools +import itertools +import posixpath +import collections + +from . import _meta +from ._collections import FreezableDefaultDict, Pair +from ._functools import method_cache, pass_none +from ._itertools import always_iterable, unique_everseen +from ._meta import PackageMetadata, SimplePath + +from contextlib import suppress +from importlib import import_module +from importlib.abc import MetaPathFinder +from itertools import starmap +from typing import Any, Iterable, List, Mapping, Match, Optional, Set, cast + +__all__ = [ + 'Distribution', + 'DistributionFinder', + 'PackageMetadata', + 'PackageNotFoundError', + 'distribution', + 'distributions', + 'entry_points', + 'files', + 'metadata', + 'packages_distributions', + 'requires', + 'version', +] + + +class PackageNotFoundError(ModuleNotFoundError): + """The package was not found.""" + + def __str__(self) -> str: + return f"No package metadata was found for {self.name}" + + @property + def name(self) -> str: # type: ignore[override] + (name,) = self.args + return name + + +class Sectioned: + """ + A simple entry point config parser for performance + + >>> for item in Sectioned.read(Sectioned._sample): + ... print(item) + Pair(name='sec1', value='# comments ignored') + Pair(name='sec1', value='a = 1') + Pair(name='sec1', value='b = 2') + Pair(name='sec2', value='a = 2') + + >>> res = Sectioned.section_pairs(Sectioned._sample) + >>> item = next(res) + >>> item.name + 'sec1' + >>> item.value + Pair(name='a', value='1') + >>> item = next(res) + >>> item.value + Pair(name='b', value='2') + >>> item = next(res) + >>> item.name + 'sec2' + >>> item.value + Pair(name='a', value='2') + >>> list(res) + [] + """ + + _sample = textwrap.dedent( + """ + [sec1] + # comments ignored + a = 1 + b = 2 + + [sec2] + a = 2 + """ + ).lstrip() + + @classmethod + def section_pairs(cls, text): + return ( + section._replace(value=Pair.parse(section.value)) + for section in cls.read(text, filter_=cls.valid) + if section.name is not None + ) + + @staticmethod + def read(text, filter_=None): + lines = filter(filter_, map(str.strip, text.splitlines())) + name = None + for value in lines: + section_match = value.startswith('[') and value.endswith(']') + if section_match: + name = value.strip('[]') + continue + yield Pair(name, value) + + @staticmethod + def valid(line: str): + return line and not line.startswith('#') + + +class EntryPoint: + """An entry point as defined by Python packaging conventions. + + See `the packaging docs on entry points + `_ + for more information. + + >>> ep = EntryPoint( + ... name=None, group=None, value='package.module:attr [extra1, extra2]') + >>> ep.module + 'package.module' + >>> ep.attr + 'attr' + >>> ep.extras + ['extra1', 'extra2'] + """ + + pattern = re.compile( + r'(?P[\w.]+)\s*' + r'(:\s*(?P[\w.]+)\s*)?' + r'((?P\[.*\])\s*)?$' + ) + """ + A regular expression describing the syntax for an entry point, + which might look like: + + - module + - package.module + - package.module:attribute + - package.module:object.attribute + - package.module:attr [extra1, extra2] + + Other combinations are possible as well. + + The expression is lenient about whitespace around the ':', + following the attr, and following any extras. + """ + + name: str + value: str + group: str + + dist: Optional[Distribution] = None + + def __init__(self, name: str, value: str, group: str) -> None: + vars(self).update(name=name, value=value, group=group) + + def load(self) -> Any: + """Load the entry point from its definition. If only a module + is indicated by the value, return that module. Otherwise, + return the named object. + """ + match = cast(Match, self.pattern.match(self.value)) + module = import_module(match.group('module')) + attrs = filter(None, (match.group('attr') or '').split('.')) + return functools.reduce(getattr, attrs, module) + + @property + def module(self) -> str: + match = self.pattern.match(self.value) + assert match is not None + return match.group('module') + + @property + def attr(self) -> str: + match = self.pattern.match(self.value) + assert match is not None + return match.group('attr') + + @property + def extras(self) -> List[str]: + match = self.pattern.match(self.value) + assert match is not None + return re.findall(r'\w+', match.group('extras') or '') + + def _for(self, dist): + vars(self).update(dist=dist) + return self + + def matches(self, **params): + """ + EntryPoint matches the given parameters. + + >>> ep = EntryPoint(group='foo', name='bar', value='bing:bong [extra1, extra2]') + >>> ep.matches(group='foo') + True + >>> ep.matches(name='bar', value='bing:bong [extra1, extra2]') + True + >>> ep.matches(group='foo', name='other') + False + >>> ep.matches() + True + >>> ep.matches(extras=['extra1', 'extra2']) + True + >>> ep.matches(module='bing') + True + >>> ep.matches(attr='bong') + True + """ + attrs = (getattr(self, param) for param in params) + return all(map(operator.eq, params.values(), attrs)) + + def _key(self): + return self.name, self.value, self.group + + def __lt__(self, other): + return self._key() < other._key() + + def __eq__(self, other): + return self._key() == other._key() + + def __setattr__(self, name, value): + raise AttributeError("EntryPoint objects are immutable.") + + def __repr__(self): + return ( + f'EntryPoint(name={self.name!r}, value={self.value!r}, ' + f'group={self.group!r})' + ) + + def __hash__(self) -> int: + return hash(self._key()) + + +class EntryPoints(tuple): + """ + An immutable collection of selectable EntryPoint objects. + """ + + __slots__ = () + + def __getitem__(self, name: str) -> EntryPoint: # type: ignore[override] + """ + Get the EntryPoint in self matching name. + """ + try: + return next(iter(self.select(name=name))) + except StopIteration: + raise KeyError(name) + + def __repr__(self): + """ + Repr with classname and tuple constructor to + signal that we deviate from regular tuple behavior. + """ + return '%s(%r)' % (self.__class__.__name__, tuple(self)) + + def select(self, **params) -> EntryPoints: + """ + Select entry points from self that match the + given parameters (typically group and/or name). + """ + return EntryPoints(ep for ep in self if ep.matches(**params)) + + @property + def names(self) -> Set[str]: + """ + Return the set of all names of all entry points. + """ + return {ep.name for ep in self} + + @property + def groups(self) -> Set[str]: + """ + Return the set of all groups of all entry points. + """ + return {ep.group for ep in self} + + @classmethod + def _from_text_for(cls, text, dist): + return cls(ep._for(dist) for ep in cls._from_text(text)) + + @staticmethod + def _from_text(text): + return ( + EntryPoint(name=item.value.name, value=item.value.value, group=item.name) + for item in Sectioned.section_pairs(text or '') + ) + + +class PackagePath(pathlib.PurePosixPath): + """A reference to a path in a package""" + + hash: Optional[FileHash] + size: int + dist: Distribution + + def read_text(self, encoding: str = 'utf-8') -> str: # type: ignore[override] + return self.locate().read_text(encoding=encoding) + + def read_binary(self) -> bytes: + return self.locate().read_bytes() + + def locate(self) -> SimplePath: + """Return a path-like object for this path""" + return self.dist.locate_file(self) + + +class FileHash: + def __init__(self, spec: str) -> None: + self.mode, _, self.value = spec.partition('=') + + def __repr__(self) -> str: + return f'' + + +class DeprecatedNonAbstract: + # Required until Python 3.14 + def __new__(cls, *args, **kwargs): + all_names = { + name for subclass in inspect.getmro(cls) for name in vars(subclass) + } + abstract = { + name + for name in all_names + if getattr(getattr(cls, name), '__isabstractmethod__', False) + } + if abstract: + warnings.warn( + f"Unimplemented abstract methods {abstract}", + DeprecationWarning, + stacklevel=2, + ) + return super().__new__(cls) + + +class Distribution(DeprecatedNonAbstract): + """ + An abstract Python distribution package. + + Custom providers may derive from this class and define + the abstract methods to provide a concrete implementation + for their environment. Some providers may opt to override + the default implementation of some properties to bypass + the file-reading mechanism. + """ + + @abc.abstractmethod + def read_text(self, filename) -> Optional[str]: + """Attempt to load metadata file given by the name. + + Python distribution metadata is organized by blobs of text + typically represented as "files" in the metadata directory + (e.g. package-1.0.dist-info). These files include things + like: + + - METADATA: The distribution metadata including fields + like Name and Version and Description. + - entry_points.txt: A series of entry points as defined in + `the entry points spec `_. + - RECORD: A record of files according to + `this recording spec `_. + + A package may provide any set of files, including those + not listed here or none at all. + + :param filename: The name of the file in the distribution info. + :return: The text if found, otherwise None. + """ + + @abc.abstractmethod + def locate_file(self, path: str | os.PathLike[str]) -> SimplePath: + """ + Given a path to a file in this distribution, return a SimplePath + to it. + """ + + @classmethod + def from_name(cls, name: str) -> Distribution: + """Return the Distribution for the given package name. + + :param name: The name of the distribution package to search for. + :return: The Distribution instance (or subclass thereof) for the named + package, if found. + :raises PackageNotFoundError: When the named package's distribution + metadata cannot be found. + :raises ValueError: When an invalid value is supplied for name. + """ + if not name: + raise ValueError("A distribution name is required.") + try: + return next(iter(cls.discover(name=name))) + except StopIteration: + raise PackageNotFoundError(name) + + @classmethod + def discover( + cls, *, context: Optional[DistributionFinder.Context] = None, **kwargs + ) -> Iterable[Distribution]: + """Return an iterable of Distribution objects for all packages. + + Pass a ``context`` or pass keyword arguments for constructing + a context. + + :context: A ``DistributionFinder.Context`` object. + :return: Iterable of Distribution objects for packages matching + the context. + """ + if context and kwargs: + raise ValueError("cannot accept context and kwargs") + context = context or DistributionFinder.Context(**kwargs) + return itertools.chain.from_iterable( + resolver(context) for resolver in cls._discover_resolvers() + ) + + @staticmethod + def at(path: str | os.PathLike[str]) -> Distribution: + """Return a Distribution for the indicated metadata path. + + :param path: a string or path-like object + :return: a concrete Distribution instance for the path + """ + return PathDistribution(pathlib.Path(path)) + + @staticmethod + def _discover_resolvers(): + """Search the meta_path for resolvers (MetadataPathFinders).""" + declared = ( + getattr(finder, 'find_distributions', None) for finder in sys.meta_path + ) + return filter(None, declared) + + @property + def metadata(self) -> _meta.PackageMetadata: + """Return the parsed metadata for this Distribution. + + The returned object will have keys that name the various bits of + metadata per the + `Core metadata specifications `_. + + Custom providers may provide the METADATA file or override this + property. + """ + # deferred for performance (python/cpython#109829) + from . import _adapters + + opt_text = ( + self.read_text('METADATA') + or self.read_text('PKG-INFO') + # This last clause is here to support old egg-info files. Its + # effect is to just end up using the PathDistribution's self._path + # (which points to the egg-info file) attribute unchanged. + or self.read_text('') + ) + text = cast(str, opt_text) + return _adapters.Message(email.message_from_string(text)) + + @property + def name(self) -> str: + """Return the 'Name' metadata for the distribution package.""" + return self.metadata['Name'] + + @property + def _normalized_name(self): + """Return a normalized version of the name.""" + return Prepared.normalize(self.name) + + @property + def version(self) -> str: + """Return the 'Version' metadata for the distribution package.""" + return self.metadata['Version'] + + @property + def entry_points(self) -> EntryPoints: + """ + Return EntryPoints for this distribution. + + Custom providers may provide the ``entry_points.txt`` file + or override this property. + """ + return EntryPoints._from_text_for(self.read_text('entry_points.txt'), self) + + @property + def files(self) -> Optional[List[PackagePath]]: + """Files in this distribution. + + :return: List of PackagePath for this distribution or None + + Result is `None` if the metadata file that enumerates files + (i.e. RECORD for dist-info, or installed-files.txt or + SOURCES.txt for egg-info) is missing. + Result may be empty if the metadata exists but is empty. + + Custom providers are recommended to provide a "RECORD" file (in + ``read_text``) or override this property to allow for callers to be + able to resolve filenames provided by the package. + """ + + def make_file(name, hash=None, size_str=None): + result = PackagePath(name) + result.hash = FileHash(hash) if hash else None + result.size = int(size_str) if size_str else None + result.dist = self + return result + + @pass_none + def make_files(lines): + # Delay csv import, since Distribution.files is not as widely used + # as other parts of importlib.metadata + import csv + + return starmap(make_file, csv.reader(lines)) + + @pass_none + def skip_missing_files(package_paths): + return list(filter(lambda path: path.locate().exists(), package_paths)) + + return skip_missing_files( + make_files( + self._read_files_distinfo() + or self._read_files_egginfo_installed() + or self._read_files_egginfo_sources() + ) + ) + + def _read_files_distinfo(self): + """ + Read the lines of RECORD. + """ + text = self.read_text('RECORD') + return text and text.splitlines() + + def _read_files_egginfo_installed(self): + """ + Read installed-files.txt and return lines in a similar + CSV-parsable format as RECORD: each file must be placed + relative to the site-packages directory and must also be + quoted (since file names can contain literal commas). + + This file is written when the package is installed by pip, + but it might not be written for other installation methods. + Assume the file is accurate if it exists. + """ + text = self.read_text('installed-files.txt') + # Prepend the .egg-info/ subdir to the lines in this file. + # But this subdir is only available from PathDistribution's + # self._path. + subdir = getattr(self, '_path', None) + if not text or not subdir: + return + + paths = ( + (subdir / name) + .resolve() + .relative_to(self.locate_file('').resolve(), walk_up=True) + .as_posix() + for name in text.splitlines() + ) + return map('"{}"'.format, paths) + + def _read_files_egginfo_sources(self): + """ + Read SOURCES.txt and return lines in a similar CSV-parsable + format as RECORD: each file name must be quoted (since it + might contain literal commas). + + Note that SOURCES.txt is not a reliable source for what + files are installed by a package. This file is generated + for a source archive, and the files that are present + there (e.g. setup.py) may not correctly reflect the files + that are present after the package has been installed. + """ + text = self.read_text('SOURCES.txt') + return text and map('"{}"'.format, text.splitlines()) + + @property + def requires(self) -> Optional[List[str]]: + """Generated requirements specified for this Distribution""" + reqs = self._read_dist_info_reqs() or self._read_egg_info_reqs() + return reqs and list(reqs) + + def _read_dist_info_reqs(self): + return self.metadata.get_all('Requires-Dist') + + def _read_egg_info_reqs(self): + source = self.read_text('requires.txt') + return pass_none(self._deps_from_requires_text)(source) + + @classmethod + def _deps_from_requires_text(cls, source): + return cls._convert_egg_info_reqs_to_simple_reqs(Sectioned.read(source)) + + @staticmethod + def _convert_egg_info_reqs_to_simple_reqs(sections): + """ + Historically, setuptools would solicit and store 'extra' + requirements, including those with environment markers, + in separate sections. More modern tools expect each + dependency to be defined separately, with any relevant + extras and environment markers attached directly to that + requirement. This method converts the former to the + latter. See _test_deps_from_requires_text for an example. + """ + + def make_condition(name): + return name and f'extra == "{name}"' + + def quoted_marker(section): + section = section or '' + extra, sep, markers = section.partition(':') + if extra and markers: + markers = f'({markers})' + conditions = list(filter(None, [markers, make_condition(extra)])) + return '; ' + ' and '.join(conditions) if conditions else '' + + def url_req_space(req): + """ + PEP 508 requires a space between the url_spec and the quoted_marker. + Ref python/importlib_metadata#357. + """ + # '@' is uniquely indicative of a url_req. + return ' ' * ('@' in req) + + for section in sections: + space = url_req_space(section.value) + yield section.value + space + quoted_marker(section.name) + + @property + def origin(self): + return self._load_json('direct_url.json') + + def _load_json(self, filename): + return pass_none(json.loads)( + self.read_text(filename), + object_hook=lambda data: types.SimpleNamespace(**data), + ) + + +class DistributionFinder(MetaPathFinder): + """ + A MetaPathFinder capable of discovering installed distributions. + + Custom providers should implement this interface in order to + supply metadata. + """ + + class Context: + """ + Keyword arguments presented by the caller to + ``distributions()`` or ``Distribution.discover()`` + to narrow the scope of a search for distributions + in all DistributionFinders. + + Each DistributionFinder may expect any parameters + and should attempt to honor the canonical + parameters defined below when appropriate. + + This mechanism gives a custom provider a means to + solicit additional details from the caller beyond + "name" and "path" when searching distributions. + For example, imagine a provider that exposes suites + of packages in either a "public" or "private" ``realm``. + A caller may wish to query only for distributions in + a particular realm and could call + ``distributions(realm="private")`` to signal to the + custom provider to only include distributions from that + realm. + """ + + name = None + """ + Specific name for which a distribution finder should match. + A name of ``None`` matches all distributions. + """ + + def __init__(self, **kwargs): + vars(self).update(kwargs) + + @property + def path(self) -> List[str]: + """ + The sequence of directory path that a distribution finder + should search. + + Typically refers to Python installed package paths such as + "site-packages" directories and defaults to ``sys.path``. + """ + return vars(self).get('path', sys.path) + + @abc.abstractmethod + def find_distributions(self, context=Context()) -> Iterable[Distribution]: + """ + Find distributions. + + Return an iterable of all Distribution instances capable of + loading the metadata for packages matching the ``context``, + a DistributionFinder.Context instance. + """ + + +class FastPath: + """ + Micro-optimized class for searching a root for children. + + Root is a path on the file system that may contain metadata + directories either as natural directories or within a zip file. + + >>> FastPath('').children() + ['...'] + + FastPath objects are cached and recycled for any given root. + + >>> FastPath('foobar') is FastPath('foobar') + True + """ + + @functools.lru_cache() # type: ignore + def __new__(cls, root): + return super().__new__(cls) + + def __init__(self, root): + self.root = root + + def joinpath(self, child): + return pathlib.Path(self.root, child) + + def children(self): + with suppress(Exception): + return os.listdir(self.root or '.') + with suppress(Exception): + return self.zip_children() + return [] + + def zip_children(self): + zip_path = zipfile.Path(self.root) + names = zip_path.root.namelist() + self.joinpath = zip_path.joinpath + + return dict.fromkeys(child.split(posixpath.sep, 1)[0] for child in names) + + def search(self, name): + return self.lookup(self.mtime).search(name) + + @property + def mtime(self): + with suppress(OSError): + return os.stat(self.root).st_mtime + self.lookup.cache_clear() + + @method_cache + def lookup(self, mtime): + return Lookup(self) + + +class Lookup: + """ + A micro-optimized class for searching a (fast) path for metadata. + """ + + def __init__(self, path: FastPath): + """ + Calculate all of the children representing metadata. + + From the children in the path, calculate early all of the + children that appear to represent metadata (infos) or legacy + metadata (eggs). + """ + + base = os.path.basename(path.root).lower() + base_is_egg = base.endswith(".egg") + self.infos = FreezableDefaultDict(list) + self.eggs = FreezableDefaultDict(list) + + for child in path.children(): + low = child.lower() + if low.endswith((".dist-info", ".egg-info")): + # rpartition is faster than splitext and suitable for this purpose. + name = low.rpartition(".")[0].partition("-")[0] + normalized = Prepared.normalize(name) + self.infos[normalized].append(path.joinpath(child)) + elif base_is_egg and low == "egg-info": + name = base.rpartition(".")[0].partition("-")[0] + legacy_normalized = Prepared.legacy_normalize(name) + self.eggs[legacy_normalized].append(path.joinpath(child)) + + self.infos.freeze() + self.eggs.freeze() + + def search(self, prepared: Prepared): + """ + Yield all infos and eggs matching the Prepared query. + """ + infos = ( + self.infos[prepared.normalized] + if prepared + else itertools.chain.from_iterable(self.infos.values()) + ) + eggs = ( + self.eggs[prepared.legacy_normalized] + if prepared + else itertools.chain.from_iterable(self.eggs.values()) + ) + return itertools.chain(infos, eggs) + + +class Prepared: + """ + A prepared search query for metadata on a possibly-named package. + + Pre-calculates the normalization to prevent repeated operations. + + >>> none = Prepared(None) + >>> none.normalized + >>> none.legacy_normalized + >>> bool(none) + False + >>> sample = Prepared('Sample__Pkg-name.foo') + >>> sample.normalized + 'sample_pkg_name_foo' + >>> sample.legacy_normalized + 'sample__pkg_name.foo' + >>> bool(sample) + True + """ + + normalized = None + legacy_normalized = None + + def __init__(self, name: Optional[str]): + self.name = name + if name is None: + return + self.normalized = self.normalize(name) + self.legacy_normalized = self.legacy_normalize(name) + + @staticmethod + def normalize(name): + """ + PEP 503 normalization plus dashes as underscores. + """ + return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_') + + @staticmethod + def legacy_normalize(name): + """ + Normalize the package name as found in the convention in + older packaging tools versions and specs. + """ + return name.lower().replace('-', '_') + + def __bool__(self): + return bool(self.name) + + +class MetadataPathFinder(DistributionFinder): + @classmethod + def find_distributions( + cls, context=DistributionFinder.Context() + ) -> Iterable[PathDistribution]: + """ + Find distributions. + + Return an iterable of all Distribution instances capable of + loading the metadata for packages matching ``context.name`` + (or all names if ``None`` indicated) along the paths in the list + of directories ``context.path``. + """ + found = cls._search_paths(context.name, context.path) + return map(PathDistribution, found) + + @classmethod + def _search_paths(cls, name, paths): + """Find metadata directories in paths heuristically.""" + prepared = Prepared(name) + return itertools.chain.from_iterable( + path.search(prepared) for path in map(FastPath, paths) + ) + + @classmethod + def invalidate_caches(cls) -> None: + FastPath.__new__.cache_clear() + + +class PathDistribution(Distribution): + def __init__(self, path: SimplePath) -> None: + """Construct a distribution. + + :param path: SimplePath indicating the metadata directory. + """ + self._path = path + + def read_text(self, filename: str | os.PathLike[str]) -> Optional[str]: + with suppress( + FileNotFoundError, + IsADirectoryError, + KeyError, + NotADirectoryError, + PermissionError, + ): + return self._path.joinpath(filename).read_text(encoding='utf-8') + + return None + + read_text.__doc__ = Distribution.read_text.__doc__ + + def locate_file(self, path: str | os.PathLike[str]) -> SimplePath: + return self._path.parent / path + + @property + def _normalized_name(self): + """ + Performance optimization: where possible, resolve the + normalized name from the file system path. + """ + stem = os.path.basename(str(self._path)) + return ( + pass_none(Prepared.normalize)(self._name_from_stem(stem)) + or super()._normalized_name + ) + + @staticmethod + def _name_from_stem(stem): + """ + >>> PathDistribution._name_from_stem('foo-3.0.egg-info') + 'foo' + >>> PathDistribution._name_from_stem('CherryPy-3.0.dist-info') + 'CherryPy' + >>> PathDistribution._name_from_stem('face.egg-info') + 'face' + >>> PathDistribution._name_from_stem('foo.bar') + """ + filename, ext = os.path.splitext(stem) + if ext not in ('.dist-info', '.egg-info'): + return + name, sep, rest = filename.partition('-') + return name + + +def distribution(distribution_name: str) -> Distribution: + """Get the ``Distribution`` instance for the named package. + + :param distribution_name: The name of the distribution package as a string. + :return: A ``Distribution`` instance (or subclass thereof). + """ + return Distribution.from_name(distribution_name) + + +def distributions(**kwargs) -> Iterable[Distribution]: + """Get all ``Distribution`` instances in the current environment. + + :return: An iterable of ``Distribution`` instances. + """ + return Distribution.discover(**kwargs) + + +def metadata(distribution_name: str) -> _meta.PackageMetadata: + """Get the metadata for the named package. + + :param distribution_name: The name of the distribution package to query. + :return: A PackageMetadata containing the parsed metadata. + """ + return Distribution.from_name(distribution_name).metadata + + +def version(distribution_name: str) -> str: + """Get the version string for the named package. + + :param distribution_name: The name of the distribution package to query. + :return: The version string for the package as defined in the package's + "Version" metadata key. + """ + return distribution(distribution_name).version + + +_unique = functools.partial( + unique_everseen, + key=operator.attrgetter('_normalized_name'), +) +""" +Wrapper for ``distributions`` to return unique distributions by name. +""" + + +def entry_points(**params) -> EntryPoints: + """Return EntryPoint objects for all installed packages. + + Pass selection parameters (group or name) to filter the + result to entry points matching those properties (see + EntryPoints.select()). + + :return: EntryPoints for all installed packages. + """ + eps = itertools.chain.from_iterable( + dist.entry_points for dist in _unique(distributions()) + ) + return EntryPoints(eps).select(**params) + + +def files(distribution_name: str) -> Optional[List[PackagePath]]: + """Return a list of files for the named package. + + :param distribution_name: The name of the distribution package to query. + :return: List of files composing the distribution. + """ + return distribution(distribution_name).files + + +def requires(distribution_name: str) -> Optional[List[str]]: + """ + Return a list of requirements for the named package. + + :return: An iterable of requirements, suitable for + packaging.requirement.Requirement. + """ + return distribution(distribution_name).requires + + +def packages_distributions() -> Mapping[str, List[str]]: + """ + Return a mapping of top-level packages to their + distributions. + + >>> import collections.abc + >>> pkgs = packages_distributions() + >>> all(isinstance(dist, collections.abc.Sequence) for dist in pkgs.values()) + True + """ + pkg_to_dist = collections.defaultdict(list) + for dist in distributions(): + for pkg in _top_level_declared(dist) or _top_level_inferred(dist): + pkg_to_dist[pkg].append(dist.metadata['Name']) + return dict(pkg_to_dist) + + +def _top_level_declared(dist): + return (dist.read_text('top_level.txt') or '').split() + + +def _topmost(name: PackagePath) -> Optional[str]: + """ + Return the top-most parent as long as there is a parent. + """ + top, *rest = name.parts + return top if rest else None + + +def _get_toplevel_name(name: PackagePath) -> str: + """ + Infer a possibly importable module name from a name presumed on + sys.path. + + >>> _get_toplevel_name(PackagePath('foo.py')) + 'foo' + >>> _get_toplevel_name(PackagePath('foo')) + 'foo' + >>> _get_toplevel_name(PackagePath('foo.pyc')) + 'foo' + >>> _get_toplevel_name(PackagePath('foo/__init__.py')) + 'foo' + >>> _get_toplevel_name(PackagePath('foo.pth')) + 'foo.pth' + >>> _get_toplevel_name(PackagePath('foo.dist-info')) + 'foo.dist-info' + """ + return _topmost(name) or ( + # python/typeshed#10328 + inspect.getmodulename(name) # type: ignore + or str(name) + ) + + +def _top_level_inferred(dist): + opt_names = set(map(_get_toplevel_name, always_iterable(dist.files))) + + def importable_name(name): + return '.' not in name + + return filter(importable_name, opt_names) diff --git a/stdlib/importlib/metadata/_adapters.py b/stdlib/importlib/metadata/_adapters.py new file mode 100644 index 00000000..59116880 --- /dev/null +++ b/stdlib/importlib/metadata/_adapters.py @@ -0,0 +1,89 @@ +import functools +import warnings +import re +import textwrap +import email.message + +from ._text import FoldedCase + + +# Do not remove prior to 2024-01-01 or Python 3.14 +_warn = functools.partial( + warnings.warn, + "Implicit None on return values is deprecated and will raise KeyErrors.", + DeprecationWarning, + stacklevel=2, +) + + +class Message(email.message.Message): + multiple_use_keys = set( + map( + FoldedCase, + [ + 'Classifier', + 'Obsoletes-Dist', + 'Platform', + 'Project-URL', + 'Provides-Dist', + 'Provides-Extra', + 'Requires-Dist', + 'Requires-External', + 'Supported-Platform', + 'Dynamic', + ], + ) + ) + """ + Keys that may be indicated multiple times per PEP 566. + """ + + def __new__(cls, orig: email.message.Message): + res = super().__new__(cls) + vars(res).update(vars(orig)) + return res + + def __init__(self, *args, **kwargs): + self._headers = self._repair_headers() + + # suppress spurious error from mypy + def __iter__(self): + return super().__iter__() + + def __getitem__(self, item): + """ + Warn users that a ``KeyError`` can be expected when a + missing key is supplied. Ref python/importlib_metadata#371. + """ + res = super().__getitem__(item) + if res is None: + _warn() + return res + + def _repair_headers(self): + def redent(value): + "Correct for RFC822 indentation" + if not value or '\n' not in value: + return value + return textwrap.dedent(' ' * 8 + value) + + headers = [(key, redent(value)) for key, value in vars(self)['_headers']] + if self._payload: + headers.append(('Description', self.get_payload())) + return headers + + @property + def json(self): + """ + Convert PackageMetadata to a JSON-compatible format + per PEP 0566. + """ + + def transform(key): + value = self.get_all(key) if key in self.multiple_use_keys else self[key] + if key == 'Keywords': + value = re.split(r'\s+', value) + tk = key.lower().replace('-', '_') + return tk, value + + return dict(map(transform, map(FoldedCase, self))) diff --git a/stdlib/importlib/metadata/_collections.py b/stdlib/importlib/metadata/_collections.py new file mode 100644 index 00000000..cf0954e1 --- /dev/null +++ b/stdlib/importlib/metadata/_collections.py @@ -0,0 +1,30 @@ +import collections + + +# from jaraco.collections 3.3 +class FreezableDefaultDict(collections.defaultdict): + """ + Often it is desirable to prevent the mutation of + a default dict after its initial construction, such + as to prevent mutation during iteration. + + >>> dd = FreezableDefaultDict(list) + >>> dd[0].append('1') + >>> dd.freeze() + >>> dd[1] + [] + >>> len(dd) + 1 + """ + + def __missing__(self, key): + return getattr(self, '_frozen', super().__missing__)(key) + + def freeze(self): + self._frozen = lambda key: self.default_factory() + + +class Pair(collections.namedtuple('Pair', 'name value')): + @classmethod + def parse(cls, text): + return cls(*map(str.strip, text.split("=", 1))) diff --git a/stdlib/importlib/metadata/_functools.py b/stdlib/importlib/metadata/_functools.py new file mode 100644 index 00000000..71f66bd0 --- /dev/null +++ b/stdlib/importlib/metadata/_functools.py @@ -0,0 +1,104 @@ +import types +import functools + + +# from jaraco.functools 3.3 +def method_cache(method, cache_wrapper=None): + """ + Wrap lru_cache to support storing the cache data in the object instances. + + Abstracts the common paradigm where the method explicitly saves an + underscore-prefixed protected property on first call and returns that + subsequently. + + >>> class MyClass: + ... calls = 0 + ... + ... @method_cache + ... def method(self, value): + ... self.calls += 1 + ... return value + + >>> a = MyClass() + >>> a.method(3) + 3 + >>> for x in range(75): + ... res = a.method(x) + >>> a.calls + 75 + + Note that the apparent behavior will be exactly like that of lru_cache + except that the cache is stored on each instance, so values in one + instance will not flush values from another, and when an instance is + deleted, so are the cached values for that instance. + + >>> b = MyClass() + >>> for x in range(35): + ... res = b.method(x) + >>> b.calls + 35 + >>> a.method(0) + 0 + >>> a.calls + 75 + + Note that if method had been decorated with ``functools.lru_cache()``, + a.calls would have been 76 (due to the cached value of 0 having been + flushed by the 'b' instance). + + Clear the cache with ``.cache_clear()`` + + >>> a.method.cache_clear() + + Same for a method that hasn't yet been called. + + >>> c = MyClass() + >>> c.method.cache_clear() + + Another cache wrapper may be supplied: + + >>> cache = functools.lru_cache(maxsize=2) + >>> MyClass.method2 = method_cache(lambda self: 3, cache_wrapper=cache) + >>> a = MyClass() + >>> a.method2() + 3 + + Caution - do not subsequently wrap the method with another decorator, such + as ``@property``, which changes the semantics of the function. + + See also + http://code.activestate.com/recipes/577452-a-memoize-decorator-for-instance-methods/ + for another implementation and additional justification. + """ + cache_wrapper = cache_wrapper or functools.lru_cache() + + def wrapper(self, *args, **kwargs): + # it's the first call, replace the method with a cached, bound method + bound_method = types.MethodType(method, self) + cached_method = cache_wrapper(bound_method) + setattr(self, method.__name__, cached_method) + return cached_method(*args, **kwargs) + + # Support cache clear even before cache has been created. + wrapper.cache_clear = lambda: None + + return wrapper + + +# From jaraco.functools 3.3 +def pass_none(func): + """ + Wrap func so it's not called if its first param is None + + >>> print_text = pass_none(print) + >>> print_text('text') + text + >>> print_text(None) + """ + + @functools.wraps(func) + def wrapper(param, *args, **kwargs): + if param is not None: + return func(param, *args, **kwargs) + + return wrapper diff --git a/stdlib/importlib/metadata/_itertools.py b/stdlib/importlib/metadata/_itertools.py new file mode 100644 index 00000000..d4ca9b91 --- /dev/null +++ b/stdlib/importlib/metadata/_itertools.py @@ -0,0 +1,73 @@ +from itertools import filterfalse + + +def unique_everseen(iterable, key=None): + "List unique elements, preserving order. Remember all elements ever seen." + # unique_everseen('AAAABBBCCDAABBB') --> A B C D + # unique_everseen('ABBCcAD', str.lower) --> A B C D + seen = set() + seen_add = seen.add + if key is None: + for element in filterfalse(seen.__contains__, iterable): + seen_add(element) + yield element + else: + for element in iterable: + k = key(element) + if k not in seen: + seen_add(k) + yield element + + +# copied from more_itertools 8.8 +def always_iterable(obj, base_type=(str, bytes)): + """If *obj* is iterable, return an iterator over its items:: + + >>> obj = (1, 2, 3) + >>> list(always_iterable(obj)) + [1, 2, 3] + + If *obj* is not iterable, return a one-item iterable containing *obj*:: + + >>> obj = 1 + >>> list(always_iterable(obj)) + [1] + + If *obj* is ``None``, return an empty iterable: + + >>> obj = None + >>> list(always_iterable(None)) + [] + + By default, binary and text strings are not considered iterable:: + + >>> obj = 'foo' + >>> list(always_iterable(obj)) + ['foo'] + + If *base_type* is set, objects for which ``isinstance(obj, base_type)`` + returns ``True`` won't be considered iterable. + + >>> obj = {'a': 1} + >>> list(always_iterable(obj)) # Iterate over the dict's keys + ['a'] + >>> list(always_iterable(obj, base_type=dict)) # Treat dicts as a unit + [{'a': 1}] + + Set *base_type* to ``None`` to avoid any special handling and treat objects + Python considers iterable as iterable: + + >>> obj = 'foo' + >>> list(always_iterable(obj, base_type=None)) + ['f', 'o', 'o'] + """ + if obj is None: + return iter(()) + + if (base_type is not None) and isinstance(obj, base_type): + return iter((obj,)) + + try: + return iter(obj) + except TypeError: + return iter((obj,)) diff --git a/stdlib/importlib/metadata/_meta.py b/stdlib/importlib/metadata/_meta.py new file mode 100644 index 00000000..1927d0f6 --- /dev/null +++ b/stdlib/importlib/metadata/_meta.py @@ -0,0 +1,67 @@ +from __future__ import annotations + +import os +from typing import Protocol +from typing import Any, Dict, Iterator, List, Optional, TypeVar, Union, overload + + +_T = TypeVar("_T") + + +class PackageMetadata(Protocol): + def __len__(self) -> int: ... # pragma: no cover + + def __contains__(self, item: str) -> bool: ... # pragma: no cover + + def __getitem__(self, key: str) -> str: ... # pragma: no cover + + def __iter__(self) -> Iterator[str]: ... # pragma: no cover + + @overload + def get( + self, name: str, failobj: None = None + ) -> Optional[str]: ... # pragma: no cover + + @overload + def get(self, name: str, failobj: _T) -> Union[str, _T]: ... # pragma: no cover + + # overload per python/importlib_metadata#435 + @overload + def get_all( + self, name: str, failobj: None = None + ) -> Optional[List[Any]]: ... # pragma: no cover + + @overload + def get_all(self, name: str, failobj: _T) -> Union[List[Any], _T]: + """ + Return all values associated with a possibly multi-valued key. + """ + + @property + def json(self) -> Dict[str, Union[str, List[str]]]: + """ + A JSON-compatible form of the metadata. + """ + + +class SimplePath(Protocol): + """ + A minimal subset of pathlib.Path required by Distribution. + """ + + def joinpath( + self, other: Union[str, os.PathLike[str]] + ) -> SimplePath: ... # pragma: no cover + + def __truediv__( + self, other: Union[str, os.PathLike[str]] + ) -> SimplePath: ... # pragma: no cover + + @property + def parent(self) -> SimplePath: ... # pragma: no cover + + def read_text(self, encoding=None) -> str: ... # pragma: no cover + + def read_bytes(self) -> bytes: ... # pragma: no cover + + def exists(self) -> bool: ... # pragma: no cover diff --git a/stdlib/importlib/metadata/_text.py b/stdlib/importlib/metadata/_text.py new file mode 100644 index 00000000..c88cfbb2 --- /dev/null +++ b/stdlib/importlib/metadata/_text.py @@ -0,0 +1,99 @@ +import re + +from ._functools import method_cache + + +# from jaraco.text 3.5 +class FoldedCase(str): + """ + A case insensitive string class; behaves just like str + except compares equal when the only variation is case. + + >>> s = FoldedCase('hello world') + + >>> s == 'Hello World' + True + + >>> 'Hello World' == s + True + + >>> s != 'Hello World' + False + + >>> s.index('O') + 4 + + >>> s.split('O') + ['hell', ' w', 'rld'] + + >>> sorted(map(FoldedCase, ['GAMMA', 'alpha', 'Beta'])) + ['alpha', 'Beta', 'GAMMA'] + + Sequence membership is straightforward. + + >>> "Hello World" in [s] + True + >>> s in ["Hello World"] + True + + You may test for set inclusion, but candidate and elements + must both be folded. + + >>> FoldedCase("Hello World") in {s} + True + >>> s in {FoldedCase("Hello World")} + True + + String inclusion works as long as the FoldedCase object + is on the right. + + >>> "hello" in FoldedCase("Hello World") + True + + But not if the FoldedCase object is on the left: + + >>> FoldedCase('hello') in 'Hello World' + False + + In that case, use in_: + + >>> FoldedCase('hello').in_('Hello World') + True + + >>> FoldedCase('hello') > FoldedCase('Hello') + False + """ + + def __lt__(self, other): + return self.lower() < other.lower() + + def __gt__(self, other): + return self.lower() > other.lower() + + def __eq__(self, other): + return self.lower() == other.lower() + + def __ne__(self, other): + return self.lower() != other.lower() + + def __hash__(self): + return hash(self.lower()) + + def __contains__(self, other): + return super().lower().__contains__(other.lower()) + + def in_(self, other): + "Does self appear in other?" + return self in FoldedCase(other) + + # cache lower since it's likely to be called frequently. + @method_cache + def lower(self): + return super().lower() + + def index(self, sub): + return self.lower().index(sub.lower()) + + def split(self, splitter=' ', maxsplit=0): + pattern = re.compile(re.escape(splitter), re.I) + return pattern.split(self, maxsplit) diff --git a/stdlib/importlib/metadata/diagnose.py b/stdlib/importlib/metadata/diagnose.py new file mode 100644 index 00000000..e405471a --- /dev/null +++ b/stdlib/importlib/metadata/diagnose.py @@ -0,0 +1,21 @@ +import sys + +from . import Distribution + + +def inspect(path): + print("Inspecting", path) + dists = list(Distribution.discover(path=[path])) + if not dists: + return + print("Found", len(dists), "packages:", end=' ') + print(', '.join(dist.name for dist in dists)) + + +def run(): + for path in sys.path: + inspect(path) + + +if __name__ == '__main__': + run() diff --git a/stdlib/importlib/readers.py b/stdlib/importlib/readers.py new file mode 100644 index 00000000..df7fb92e --- /dev/null +++ b/stdlib/importlib/readers.py @@ -0,0 +1,12 @@ +""" +Compatibility shim for .resources.readers as found on Python 3.10. + +Consumers that can rely on Python 3.11 should use the other +module directly. +""" + +from .resources.readers import ( + FileReader, ZipReader, MultiplexedPath, NamespaceReader, +) + +__all__ = ['FileReader', 'ZipReader', 'MultiplexedPath', 'NamespaceReader'] diff --git a/stdlib/importlib/resources/__init__.py b/stdlib/importlib/resources/__init__.py new file mode 100644 index 00000000..723c9f9e --- /dev/null +++ b/stdlib/importlib/resources/__init__.py @@ -0,0 +1,43 @@ +""" +Read resources contained within a package. + +This codebase is shared between importlib.resources in the stdlib +and importlib_resources in PyPI. See +https://github.com/python/importlib_metadata/wiki/Development-Methodology +for more detail. +""" + +from ._common import ( + as_file, + files, + Package, + Anchor, +) + +from ._functional import ( + contents, + is_resource, + open_binary, + open_text, + path, + read_binary, + read_text, +) + +from .abc import ResourceReader + + +__all__ = [ + 'Package', + 'Anchor', + 'ResourceReader', + 'as_file', + 'files', + 'contents', + 'is_resource', + 'open_binary', + 'open_text', + 'path', + 'read_binary', + 'read_text', +] diff --git a/stdlib/importlib/resources/_adapters.py b/stdlib/importlib/resources/_adapters.py new file mode 100644 index 00000000..50688fbb --- /dev/null +++ b/stdlib/importlib/resources/_adapters.py @@ -0,0 +1,168 @@ +from contextlib import suppress +from io import TextIOWrapper + +from . import abc + + +class SpecLoaderAdapter: + """ + Adapt a package spec to adapt the underlying loader. + """ + + def __init__(self, spec, adapter=lambda spec: spec.loader): + self.spec = spec + self.loader = adapter(spec) + + def __getattr__(self, name): + return getattr(self.spec, name) + + +class TraversableResourcesLoader: + """ + Adapt a loader to provide TraversableResources. + """ + + def __init__(self, spec): + self.spec = spec + + def get_resource_reader(self, name): + return CompatibilityFiles(self.spec)._native() + + +def _io_wrapper(file, mode='r', *args, **kwargs): + if mode == 'r': + return TextIOWrapper(file, *args, **kwargs) + elif mode == 'rb': + return file + raise ValueError(f"Invalid mode value '{mode}', only 'r' and 'rb' are supported") + + +class CompatibilityFiles: + """ + Adapter for an existing or non-existent resource reader + to provide a compatibility .files(). + """ + + class SpecPath(abc.Traversable): + """ + Path tied to a module spec. + Can be read and exposes the resource reader children. + """ + + def __init__(self, spec, reader): + self._spec = spec + self._reader = reader + + def iterdir(self): + if not self._reader: + return iter(()) + return iter( + CompatibilityFiles.ChildPath(self._reader, path) + for path in self._reader.contents() + ) + + def is_file(self): + return False + + is_dir = is_file + + def joinpath(self, other): + if not self._reader: + return CompatibilityFiles.OrphanPath(other) + return CompatibilityFiles.ChildPath(self._reader, other) + + @property + def name(self): + return self._spec.name + + def open(self, mode='r', *args, **kwargs): + return _io_wrapper(self._reader.open_resource(None), mode, *args, **kwargs) + + class ChildPath(abc.Traversable): + """ + Path tied to a resource reader child. + Can be read but doesn't expose any meaningful children. + """ + + def __init__(self, reader, name): + self._reader = reader + self._name = name + + def iterdir(self): + return iter(()) + + def is_file(self): + return self._reader.is_resource(self.name) + + def is_dir(self): + return not self.is_file() + + def joinpath(self, other): + return CompatibilityFiles.OrphanPath(self.name, other) + + @property + def name(self): + return self._name + + def open(self, mode='r', *args, **kwargs): + return _io_wrapper( + self._reader.open_resource(self.name), mode, *args, **kwargs + ) + + class OrphanPath(abc.Traversable): + """ + Orphan path, not tied to a module spec or resource reader. + Can't be read and doesn't expose any meaningful children. + """ + + def __init__(self, *path_parts): + if len(path_parts) < 1: + raise ValueError('Need at least one path part to construct a path') + self._path = path_parts + + def iterdir(self): + return iter(()) + + def is_file(self): + return False + + is_dir = is_file + + def joinpath(self, other): + return CompatibilityFiles.OrphanPath(*self._path, other) + + @property + def name(self): + return self._path[-1] + + def open(self, mode='r', *args, **kwargs): + raise FileNotFoundError("Can't open orphan path") + + def __init__(self, spec): + self.spec = spec + + @property + def _reader(self): + with suppress(AttributeError): + return self.spec.loader.get_resource_reader(self.spec.name) + + def _native(self): + """ + Return the native reader if it supports files(). + """ + reader = self._reader + return reader if hasattr(reader, 'files') else self + + def __getattr__(self, attr): + return getattr(self._reader, attr) + + def files(self): + return CompatibilityFiles.SpecPath(self.spec, self._reader) + + +def wrap_spec(package): + """ + Construct a package spec with traversable compatibility + on the spec/loader/reader. + """ + return SpecLoaderAdapter(package.__spec__, TraversableResourcesLoader) diff --git a/stdlib/importlib/resources/_common.py b/stdlib/importlib/resources/_common.py new file mode 100644 index 00000000..4e9014c4 --- /dev/null +++ b/stdlib/importlib/resources/_common.py @@ -0,0 +1,211 @@ +import os +import pathlib +import tempfile +import functools +import contextlib +import types +import importlib +import inspect +import warnings +import itertools + +from typing import Union, Optional, cast +from .abc import ResourceReader, Traversable + +Package = Union[types.ModuleType, str] +Anchor = Package + + +def package_to_anchor(func): + """ + Replace 'package' parameter as 'anchor' and warn about the change. + + Other errors should fall through. + + >>> files('a', 'b') + Traceback (most recent call last): + TypeError: files() takes from 0 to 1 positional arguments but 2 were given + + Remove this compatibility in Python 3.14. + """ + undefined = object() + + @functools.wraps(func) + def wrapper(anchor=undefined, package=undefined): + if package is not undefined: + if anchor is not undefined: + return func(anchor, package) + warnings.warn( + "First parameter to files is renamed to 'anchor'", + DeprecationWarning, + stacklevel=2, + ) + return func(package) + elif anchor is undefined: + return func() + return func(anchor) + + return wrapper + + +@package_to_anchor +def files(anchor: Optional[Anchor] = None) -> Traversable: + """ + Get a Traversable resource for an anchor. + """ + return from_package(resolve(anchor)) + + +def get_resource_reader(package: types.ModuleType) -> Optional[ResourceReader]: + """ + Return the package's loader if it's a ResourceReader. + """ + # We can't use + # a issubclass() check here because apparently abc.'s __subclasscheck__() + # hook wants to create a weak reference to the object, but + # zipimport.zipimporter does not support weak references, resulting in a + # TypeError. That seems terrible. + spec = package.__spec__ + reader = getattr(spec.loader, 'get_resource_reader', None) # type: ignore[union-attr] + if reader is None: + return None + return reader(spec.name) # type: ignore[union-attr] + + +@functools.singledispatch +def resolve(cand: Optional[Anchor]) -> types.ModuleType: + return cast(types.ModuleType, cand) + + +@resolve.register +def _(cand: str) -> types.ModuleType: + return importlib.import_module(cand) + + +@resolve.register +def _(cand: None) -> types.ModuleType: + return resolve(_infer_caller().f_globals['__name__']) + + +def _infer_caller(): + """ + Walk the stack and find the frame of the first caller not in this module. + """ + + def is_this_file(frame_info): + return frame_info.filename == stack[0].filename + + def is_wrapper(frame_info): + return frame_info.function == 'wrapper' + + stack = inspect.stack() + not_this_file = itertools.filterfalse(is_this_file, stack) + # also exclude 'wrapper' due to singledispatch in the call stack + callers = itertools.filterfalse(is_wrapper, not_this_file) + return next(callers).frame + + +def from_package(package: types.ModuleType): + """ + Return a Traversable object for the given package. + + """ + # deferred for performance (python/cpython#109829) + from ._adapters import wrap_spec + + spec = wrap_spec(package) + reader = spec.loader.get_resource_reader(spec.name) + return reader.files() + + +@contextlib.contextmanager +def _tempfile( + reader, + suffix='', + # gh-93353: Keep a reference to call os.remove() in late Python + # finalization. + *, + _os_remove=os.remove, +): + # Not using tempfile.NamedTemporaryFile as it leads to deeper 'try' + # blocks due to the need to close the temporary file to work on Windows + # properly. + fd, raw_path = tempfile.mkstemp(suffix=suffix) + try: + try: + os.write(fd, reader()) + finally: + os.close(fd) + del reader + yield pathlib.Path(raw_path) + finally: + try: + _os_remove(raw_path) + except FileNotFoundError: + pass + + +def _temp_file(path): + return _tempfile(path.read_bytes, suffix=path.name) + + +def _is_present_dir(path: Traversable) -> bool: + """ + Some Traversables implement ``is_dir()`` to raise an + exception (i.e. ``FileNotFoundError``) when the + directory doesn't exist. This function wraps that call + to always return a boolean and only return True + if there's a dir and it exists. + """ + with contextlib.suppress(FileNotFoundError): + return path.is_dir() + return False + + +@functools.singledispatch +def as_file(path): + """ + Given a Traversable object, return that object as a + path on the local file system in a context manager. + """ + return _temp_dir(path) if _is_present_dir(path) else _temp_file(path) + + +@as_file.register(pathlib.Path) +@contextlib.contextmanager +def _(path): + """ + Degenerate behavior for pathlib.Path objects. + """ + yield path + + +@contextlib.contextmanager +def _temp_path(dir: tempfile.TemporaryDirectory): + """ + Wrap tempfile.TemporaryDirectory to return a pathlib object. + """ + with dir as result: + yield pathlib.Path(result) + + +@contextlib.contextmanager +def _temp_dir(path): + """ + Given a traversable dir, recursively replicate the whole tree + to the file system in a context manager. + """ + assert path.is_dir() + with _temp_path(tempfile.TemporaryDirectory()) as temp_dir: + yield _write_contents(temp_dir, path) + + +def _write_contents(target, source): + child = target.joinpath(source.name) + if source.is_dir(): + child.mkdir() + for item in source.iterdir(): + _write_contents(child, item) + else: + child.write_bytes(source.read_bytes()) + return child diff --git a/stdlib/importlib/resources/_functional.py b/stdlib/importlib/resources/_functional.py new file mode 100644 index 00000000..f59416f2 --- /dev/null +++ b/stdlib/importlib/resources/_functional.py @@ -0,0 +1,81 @@ +"""Simplified function-based API for importlib.resources""" + +import warnings + +from ._common import files, as_file + + +_MISSING = object() + + +def open_binary(anchor, *path_names): + """Open for binary reading the *resource* within *package*.""" + return _get_resource(anchor, path_names).open('rb') + + +def open_text(anchor, *path_names, encoding=_MISSING, errors='strict'): + """Open for text reading the *resource* within *package*.""" + encoding = _get_encoding_arg(path_names, encoding) + resource = _get_resource(anchor, path_names) + return resource.open('r', encoding=encoding, errors=errors) + + +def read_binary(anchor, *path_names): + """Read and return contents of *resource* within *package* as bytes.""" + return _get_resource(anchor, path_names).read_bytes() + + +def read_text(anchor, *path_names, encoding=_MISSING, errors='strict'): + """Read and return contents of *resource* within *package* as str.""" + encoding = _get_encoding_arg(path_names, encoding) + resource = _get_resource(anchor, path_names) + return resource.read_text(encoding=encoding, errors=errors) + + +def path(anchor, *path_names): + """Return the path to the *resource* as an actual file system path.""" + return as_file(_get_resource(anchor, path_names)) + + +def is_resource(anchor, *path_names): + """Return ``True`` if there is a resource named *name* in the package, + + Otherwise returns ``False``. + """ + return _get_resource(anchor, path_names).is_file() + + +def contents(anchor, *path_names): + """Return an iterable over the named resources within the package. + + The iterable returns :class:`str` resources (e.g. files). + The iterable does not recurse into subdirectories. + """ + warnings.warn( + "importlib.resources.contents is deprecated. " + "Use files(anchor).iterdir() instead.", + DeprecationWarning, + stacklevel=1, + ) + return (resource.name for resource in _get_resource(anchor, path_names).iterdir()) + + +def _get_encoding_arg(path_names, encoding): + # For compatibility with versions where *encoding* was a positional + # argument, it needs to be given explicitly when there are multiple + # *path_names*. + # This limitation can be removed in Python 3.15. + if encoding is _MISSING: + if len(path_names) > 1: + raise TypeError( + "'encoding' argument required with multiple path names", + ) + else: + return 'utf-8' + return encoding + + +def _get_resource(anchor, path_names): + if anchor is None: + raise TypeError("anchor must be module or string, got None") + return files(anchor).joinpath(*path_names) diff --git a/stdlib/importlib/resources/_itertools.py b/stdlib/importlib/resources/_itertools.py new file mode 100644 index 00000000..7b775ef5 --- /dev/null +++ b/stdlib/importlib/resources/_itertools.py @@ -0,0 +1,38 @@ +# from more_itertools 9.0 +def only(iterable, default=None, too_long=None): + """If *iterable* has only one item, return it. + If it has zero items, return *default*. + If it has more than one item, raise the exception given by *too_long*, + which is ``ValueError`` by default. + >>> only([], default='missing') + 'missing' + >>> only([1]) + 1 + >>> only([1, 2]) # doctest: +IGNORE_EXCEPTION_DETAIL + Traceback (most recent call last): + ... + ValueError: Expected exactly one item in iterable, but got 1, 2, + and perhaps more.' + >>> only([1, 2], too_long=TypeError) # doctest: +IGNORE_EXCEPTION_DETAIL + Traceback (most recent call last): + ... + TypeError + Note that :func:`only` attempts to advance *iterable* twice to ensure there + is only one item. See :func:`spy` or :func:`peekable` to check + iterable contents less destructively. + """ + it = iter(iterable) + first_value = next(it, default) + + try: + second_value = next(it) + except StopIteration: + pass + else: + msg = ( + 'Expected exactly one item in iterable, but got {!r}, {!r}, ' + 'and perhaps more.'.format(first_value, second_value) + ) + raise too_long or ValueError(msg) + + return first_value diff --git a/stdlib/importlib/resources/abc.py b/stdlib/importlib/resources/abc.py new file mode 100644 index 00000000..6750a7aa --- /dev/null +++ b/stdlib/importlib/resources/abc.py @@ -0,0 +1,173 @@ +import abc +import io +import itertools +import os +import pathlib +from typing import Any, BinaryIO, Iterable, Iterator, NoReturn, Text, Optional +from typing import runtime_checkable, Protocol +from typing import Union + + +StrPath = Union[str, os.PathLike[str]] + +__all__ = ["ResourceReader", "Traversable", "TraversableResources"] + + +class ResourceReader(metaclass=abc.ABCMeta): + """Abstract base class for loaders to provide resource reading support.""" + + @abc.abstractmethod + def open_resource(self, resource: Text) -> BinaryIO: + """Return an opened, file-like object for binary reading. + + The 'resource' argument is expected to represent only a file name. + If the resource cannot be found, FileNotFoundError is raised. + """ + # This deliberately raises FileNotFoundError instead of + # NotImplementedError so that if this method is accidentally called, + # it'll still do the right thing. + raise FileNotFoundError + + @abc.abstractmethod + def resource_path(self, resource: Text) -> Text: + """Return the file system path to the specified resource. + + The 'resource' argument is expected to represent only a file name. + If the resource does not exist on the file system, raise + FileNotFoundError. + """ + # This deliberately raises FileNotFoundError instead of + # NotImplementedError so that if this method is accidentally called, + # it'll still do the right thing. + raise FileNotFoundError + + @abc.abstractmethod + def is_resource(self, path: Text) -> bool: + """Return True if the named 'path' is a resource. + + Files are resources, directories are not. + """ + raise FileNotFoundError + + @abc.abstractmethod + def contents(self) -> Iterable[str]: + """Return an iterable of entries in `package`.""" + raise FileNotFoundError + + +class TraversalError(Exception): + pass + + +@runtime_checkable +class Traversable(Protocol): + """ + An object with a subset of pathlib.Path methods suitable for + traversing directories and opening files. + + Any exceptions that occur when accessing the backing resource + may propagate unaltered. + """ + + @abc.abstractmethod + def iterdir(self) -> Iterator["Traversable"]: + """ + Yield Traversable objects in self + """ + + def read_bytes(self) -> bytes: + """ + Read contents of self as bytes + """ + with self.open('rb') as strm: + return strm.read() + + def read_text(self, encoding: Optional[str] = None) -> str: + """ + Read contents of self as text + """ + with self.open(encoding=encoding) as strm: + return strm.read() + + @abc.abstractmethod + def is_dir(self) -> bool: + """ + Return True if self is a directory + """ + + @abc.abstractmethod + def is_file(self) -> bool: + """ + Return True if self is a file + """ + + def joinpath(self, *descendants: StrPath) -> "Traversable": + """ + Return Traversable resolved with any descendants applied. + + Each descendant should be a path segment relative to self + and each may contain multiple levels separated by + ``posixpath.sep`` (``/``). + """ + if not descendants: + return self + names = itertools.chain.from_iterable( + path.parts for path in map(pathlib.PurePosixPath, descendants) + ) + target = next(names) + matches = ( + traversable for traversable in self.iterdir() if traversable.name == target + ) + try: + match = next(matches) + except StopIteration: + raise TraversalError( + "Target not found during traversal.", target, list(names) + ) + return match.joinpath(*names) + + def __truediv__(self, child: StrPath) -> "Traversable": + """ + Return Traversable child in self + """ + return self.joinpath(child) + + @abc.abstractmethod + def open(self, mode='r', *args, **kwargs): + """ + mode may be 'r' or 'rb' to open as text or binary. Return a handle + suitable for reading (same as pathlib.Path.open). + + When opening as text, accepts encoding parameters such as those + accepted by io.TextIOWrapper. + """ + + @property + @abc.abstractmethod + def name(self) -> str: + """ + The base name of this object without any parent references. + """ + + +class TraversableResources(ResourceReader): + """ + The required interface for providing traversable + resources. + """ + + @abc.abstractmethod + def files(self) -> "Traversable": + """Return a Traversable object for the loaded package.""" + + def open_resource(self, resource: StrPath) -> io.BufferedReader: + return self.files().joinpath(resource).open('rb') + + def resource_path(self, resource: Any) -> NoReturn: + raise FileNotFoundError(resource) + + def is_resource(self, path: StrPath) -> bool: + return self.files().joinpath(path).is_file() + + def contents(self) -> Iterator[str]: + return (item.name for item in self.files().iterdir()) diff --git a/stdlib/importlib/resources/readers.py b/stdlib/importlib/resources/readers.py new file mode 100644 index 00000000..70fc7e2b --- /dev/null +++ b/stdlib/importlib/resources/readers.py @@ -0,0 +1,203 @@ +from __future__ import annotations + +import collections +import contextlib +import itertools +import pathlib +import operator +import re +import warnings +import zipfile +from collections.abc import Iterator + +from . import abc + +from ._itertools import only + + +def remove_duplicates(items): + return iter(collections.OrderedDict.fromkeys(items)) + + +class FileReader(abc.TraversableResources): + def __init__(self, loader): + self.path = pathlib.Path(loader.path).parent + + def resource_path(self, resource): + """ + Return the file system path to prevent + `resources.path()` from creating a temporary + copy. + """ + return str(self.path.joinpath(resource)) + + def files(self): + return self.path + + +class ZipReader(abc.TraversableResources): + def __init__(self, loader, module): + self.prefix = loader.prefix.replace('\\', '/') + if loader.is_package(module): + _, _, name = module.rpartition('.') + self.prefix += name + '/' + self.archive = loader.archive + + def open_resource(self, resource): + try: + return super().open_resource(resource) + except KeyError as exc: + raise FileNotFoundError(exc.args[0]) + + def is_resource(self, path): + """ + Workaround for `zipfile.Path.is_file` returning true + for non-existent paths. + """ + target = self.files().joinpath(path) + return target.is_file() and target.exists() + + def files(self): + return zipfile.Path(self.archive, self.prefix) + + +class MultiplexedPath(abc.Traversable): + """ + Given a series of Traversable objects, implement a merged + version of the interface across all objects. Useful for + namespace packages which may be multihomed at a single + name. + """ + + def __init__(self, *paths): + self._paths = list(map(_ensure_traversable, remove_duplicates(paths))) + if not self._paths: + message = 'MultiplexedPath must contain at least one path' + raise FileNotFoundError(message) + if not all(path.is_dir() for path in self._paths): + raise NotADirectoryError('MultiplexedPath only supports directories') + + def iterdir(self): + children = (child for path in self._paths for child in path.iterdir()) + by_name = operator.attrgetter('name') + groups = itertools.groupby(sorted(children, key=by_name), key=by_name) + return map(self._follow, (locs for name, locs in groups)) + + def read_bytes(self): + raise FileNotFoundError(f'{self} is not a file') + + def read_text(self, *args, **kwargs): + raise FileNotFoundError(f'{self} is not a file') + + def is_dir(self): + return True + + def is_file(self): + return False + + def joinpath(self, *descendants): + try: + return super().joinpath(*descendants) + except abc.TraversalError: + # One of the paths did not resolve (a directory does not exist). + # Just return something that will not exist. + return self._paths[0].joinpath(*descendants) + + @classmethod + def _follow(cls, children): + """ + Construct a MultiplexedPath if needed. + + If children contains a sole element, return it. + Otherwise, return a MultiplexedPath of the items. + Unless one of the items is not a Directory, then return the first. + """ + subdirs, one_dir, one_file = itertools.tee(children, 3) + + try: + return only(one_dir) + except ValueError: + try: + return cls(*subdirs) + except NotADirectoryError: + return next(one_file) + + def open(self, *args, **kwargs): + raise FileNotFoundError(f'{self} is not a file') + + @property + def name(self): + return self._paths[0].name + + def __repr__(self): + paths = ', '.join(f"'{path}'" for path in self._paths) + return f'MultiplexedPath({paths})' + + +class NamespaceReader(abc.TraversableResources): + def __init__(self, namespace_path): + if 'NamespacePath' not in str(namespace_path): + raise ValueError('Invalid path') + self.path = MultiplexedPath(*filter(bool, map(self._resolve, namespace_path))) + + @classmethod + def _resolve(cls, path_str) -> abc.Traversable | None: + r""" + Given an item from a namespace path, resolve it to a Traversable. + + path_str might be a directory on the filesystem or a path to a + zipfile plus the path within the zipfile, e.g. ``/foo/bar`` or + ``/foo/baz.zip/inner_dir`` or ``foo\baz.zip\inner_dir\sub``. + + path_str might also be a sentinel used by editable packages to + trigger other behaviors (see python/importlib_resources#311). + In that case, return None. + """ + dirs = (cand for cand in cls._candidate_paths(path_str) if cand.is_dir()) + return next(dirs, None) + + @classmethod + def _candidate_paths(cls, path_str: str) -> Iterator[abc.Traversable]: + yield pathlib.Path(path_str) + yield from cls._resolve_zip_path(path_str) + + @staticmethod + def _resolve_zip_path(path_str: str): + for match in reversed(list(re.finditer(r'[\\/]', path_str))): + with contextlib.suppress( + FileNotFoundError, + IsADirectoryError, + NotADirectoryError, + PermissionError, + ): + inner = path_str[match.end() :].replace('\\', '/') + '/' + yield zipfile.Path(path_str[: match.start()], inner.lstrip('/')) + + def resource_path(self, resource): + """ + Return the file system path to prevent + `resources.path()` from creating a temporary + copy. + """ + return str(self.path.joinpath(resource)) + + def files(self): + return self.path + + +def _ensure_traversable(path): + """ + Convert deprecated string arguments to traversables (pathlib.Path). + + Remove with Python 3.15. + """ + if not isinstance(path, str): + return path + + warnings.warn( + "String arguments are deprecated. Pass a Traversable instead.", + DeprecationWarning, + stacklevel=3, + ) + + return pathlib.Path(path) diff --git a/stdlib/importlib/resources/simple.py b/stdlib/importlib/resources/simple.py new file mode 100644 index 00000000..2e75299b --- /dev/null +++ b/stdlib/importlib/resources/simple.py @@ -0,0 +1,106 @@ +""" +Interface adapters for low-level readers. +""" + +import abc +import io +import itertools +from typing import BinaryIO, List + +from .abc import Traversable, TraversableResources + + +class SimpleReader(abc.ABC): + """ + The minimum, low-level interface required from a resource + provider. + """ + + @property + @abc.abstractmethod + def package(self) -> str: + """ + The name of the package for which this reader loads resources. + """ + + @abc.abstractmethod + def children(self) -> List['SimpleReader']: + """ + Obtain an iterable of SimpleReader for available + child containers (e.g. directories). + """ + + @abc.abstractmethod + def resources(self) -> List[str]: + """ + Obtain available named resources for this virtual package. + """ + + @abc.abstractmethod + def open_binary(self, resource: str) -> BinaryIO: + """ + Obtain a File-like for a named resource. + """ + + @property + def name(self): + return self.package.split('.')[-1] + + +class ResourceContainer(Traversable): + """ + Traversable container for a package's resources via its reader. + """ + + def __init__(self, reader: SimpleReader): + self.reader = reader + + def is_dir(self): + return True + + def is_file(self): + return False + + def iterdir(self): + files = (ResourceHandle(self, name) for name in self.reader.resources) + dirs = map(ResourceContainer, self.reader.children()) + return itertools.chain(files, dirs) + + def open(self, *args, **kwargs): + raise IsADirectoryError() + + +class ResourceHandle(Traversable): + """ + Handle to a named resource in a ResourceReader. + """ + + def __init__(self, parent: ResourceContainer, name: str): + self.parent = parent + self.name = name # type: ignore[misc] + + def is_file(self): + return True + + def is_dir(self): + return False + + def open(self, mode='r', *args, **kwargs): + stream = self.parent.reader.open_binary(self.name) + if 'b' not in mode: + stream = io.TextIOWrapper(stream, *args, **kwargs) + return stream + + def joinpath(self, name): + raise RuntimeError("Cannot traverse into a resource") + + +class TraversableReader(TraversableResources, SimpleReader): + """ + A TraversableResources based on SimpleReader. Resource providers + may derive from this class to provide the TraversableResources + interface by supplying the SimpleReader interface. + """ + + def files(self): + return ResourceContainer(self) diff --git a/stdlib/importlib/simple.py b/stdlib/importlib/simple.py new file mode 100644 index 00000000..845bb903 --- /dev/null +++ b/stdlib/importlib/simple.py @@ -0,0 +1,14 @@ +""" +Compatibility shim for .resources.simple as found on Python 3.10. + +Consumers that can rely on Python 3.11 should use the other +module directly. +""" + +from .resources.simple import ( + SimpleReader, ResourceHandle, ResourceContainer, TraversableReader, +) + +__all__ = [ + 'SimpleReader', 'ResourceHandle', 'ResourceContainer', 'TraversableReader', +] diff --git a/stdlib/importlib/util.py b/stdlib/importlib/util.py index 0808ba2a..2b564e9b 100644 --- a/stdlib/importlib/util.py +++ b/stdlib/importlib/util.py @@ -1,241 +1,279 @@ -"""importlib.util: gopy stub for the parts pkgutil/unittest.mock need. - -CPython's Lib/importlib/util.py re-exports symbols from the import -machinery's _bootstrap and _bootstrap_external modules, which gopy -doesn't fully ship. The pkgutil/unittest.mock load path only references -MAGIC_NUMBER at module load (inside a function body) plus find_spec -later; resolve_name doesn't touch util at all. Until spec 1711 Phase -9 wires the full importlib port this stub keeps the import chain -green. - -CPython: Lib/importlib/util.py -""" - -import os +"""Utility code for constructing importers, etc.""" +from ._abc import Loader +from ._bootstrap import module_from_spec +from ._bootstrap import _resolve_name +from ._bootstrap import spec_from_loader +from ._bootstrap import _find_spec +from ._bootstrap_external import MAGIC_NUMBER +from ._bootstrap_external import cache_from_source +from ._bootstrap_external import decode_source +from ._bootstrap_external import source_from_cache +from ._bootstrap_external import spec_from_file_location + +import _imp import sys import types -from importlib._bootstrap import module_from_spec -from importlib._bootstrap_external import ( - MAGIC_NUMBER, - cache_from_source, - decode_source, - source_from_cache, - source_hash, -) -from importlib.machinery import ModuleSpec - -class _SourceFileLoader: - """Minimal SourceFileLoader: reads the .py file and compiles it. +def source_hash(source_bytes): + "Return the hash of *source_bytes* as used in hash-based pyc files." + return _imp.source_hash(_imp.pyc_magic_number_token, source_bytes) - CPython: Lib/importlib/_bootstrap_external.py:962 SourceFileLoader - """ - - def __init__(self, name, path): - self.name = name - self.path = path - - def get_filename(self, fullname=None): - return self.path - - def get_source(self, fullname=None): - with open(self.path, "rb") as f: - data = f.read() - try: - return data.decode("utf-8") - except UnicodeDecodeError: - return data.decode("latin-1") - - def get_code(self, fullname): - source = self.get_source(fullname) - return compile(source, self.path, "exec") +def resolve_name(name, package): + """Resolve a relative module name to an absolute one.""" + if not name.startswith('.'): + return name + elif not package: + raise ImportError(f'no package specified for {repr(name)} ' + '(required for relative module names)') + level = 0 + for character in name: + if character != '.': + break + level += 1 + return _resolve_name(name[level:], package, level) -def _resolve_search_paths(name): - parent, _, _ = name.rpartition(".") - if not parent: - return sys.path - pkg = sys.modules.get(parent) - if pkg is None: - try: - __import__(parent) - except ImportError: - return None - pkg = sys.modules.get(parent) - if pkg is None: - return None - return getattr(pkg, "__path__", None) +def _find_spec_from_path(name, path=None): + """Return the spec for the specified module. -def _spec_from_search(name, search): - """Scan the directory list `search` for name's tail and build a spec. + First, sys.modules is checked to see if the module was already imported. If + so, then sys.modules[name].__spec__ is returned. If that happens to be + set to None, then ValueError is raised. If the module is not in + sys.modules, then sys.meta_path is searched for a suitable spec with the + value of 'path' given to the finders. None is returned if no spec could + be found. - Shared by find_spec and _find_spec_from_path; mirrors the suffix - loop FileFinder.find_spec runs against a single path entry list. + Dotted names do not have their parent packages implicitly imported. You will + most likely need to explicitly import all parent packages in the proper + order for a submodule to get the correct spec. - CPython: Lib/importlib/_bootstrap_external.py:1357 FileFinder.find_spec """ - if search is None: - return None - tail = name.rpartition(".")[2] - # PEP 420: every directory that matches the tail but lacks a regular - # __init__.py / module file contributes a namespace portion. CPython's - # PathFinder accumulates these across all path entries and, if no - # concrete module is found, returns a namespace spec whose loader is - # None and whose search locations are the collected portions. - # - # CPython: Lib/importlib/_bootstrap_external.py:1496 _fill_cache / - # PathFinder._get_spec namespace_path accumulation - namespace_portions = [] - for entry in search: - directory = entry if entry else "." - pkg_init = os.path.join(directory, tail, "__init__.py") - if os.path.isfile(pkg_init): - return spec_from_file_location( - name, pkg_init, - loader=_SourceFileLoader(name, pkg_init), - submodule_search_locations=[os.path.join(directory, tail)]) - mod_file = os.path.join(directory, tail + ".py") - if os.path.isfile(mod_file): - return spec_from_file_location( - name, mod_file, loader=_SourceFileLoader(name, mod_file)) - pkg_dir = os.path.join(directory, tail) - if os.path.isdir(pkg_dir): - namespace_portions.append(pkg_dir) - if namespace_portions: - spec = ModuleSpec(name, None, is_package=True) - spec.submodule_search_locations = list(namespace_portions) - return spec - return None + if name not in sys.modules: + return _find_spec(name, path) + else: + module = sys.modules[name] + if module is None: + return None + try: + spec = module.__spec__ + except AttributeError: + raise ValueError(f'{name}.__spec__ is not set') from None + else: + if spec is None: + raise ValueError(f'{name}.__spec__ is None') + return spec def find_spec(name, package=None): - """Locate name on sys.path (or the parent package's __path__) and - return a ModuleSpec the caller can drive through .loader.get_code(). + """Return the spec for the specified module. - CPython: Lib/importlib/util.py:90 find_spec - """ - if name.startswith("."): - if package is None: - raise ValueError("relative module name requires package") - name = resolve_name(name, package) - if name in sys.modules: - mod = sys.modules[name] - spec = getattr(mod, "__spec__", None) - if spec is not None: - return spec - return _spec_from_search(name, _resolve_search_paths(name)) + First, sys.modules is checked to see if the module was already imported. If + so, then sys.modules[name].__spec__ is returned. If that happens to be + set to None, then ValueError is raised. If the module is not in + sys.modules, then sys.meta_path is searched for a suitable spec with the + value of 'path' given to the finders. None is returned if no spec could + be found. + If the name is for submodule (contains a dot), the parent module is + automatically imported. -def _find_spec_from_path(name, path=None): - """Return the spec for name, searching `path` (or sys.path). - - First sys.modules is checked; if the module is already imported its - __spec__ is returned (None __spec__ raises ValueError). Otherwise the - given path is scanned. Dotted names do not implicitly import their - parents, matching CPython. + The name and package arguments work the same as importlib.import_module(). + In other words, relative module names (with leading dots) work. - CPython: Lib/importlib/util.py:_find_spec_from_path """ - if name not in sys.modules: - search = sys.path if path is None else path - return _spec_from_search(name, search) - module = sys.modules[name] - if module is None: - return None - try: - spec = module.__spec__ - except AttributeError: - raise ValueError(f'{name}.__spec__ is not set') from None - if spec is None: - raise ValueError(f'{name}.__spec__ is None') - return spec - - -def spec_from_loader(name, loader, *, origin=None, is_package=None): - """Return a ModuleSpec based on a loader. - - CPython: Lib/importlib/util.py:44 spec_from_loader - """ - if origin is None and hasattr(loader, 'get_filename'): - try: - origin = loader.get_filename(name) - except (ImportError, AttributeError): - pass - if is_package is None: - if hasattr(loader, 'is_package'): + fullname = resolve_name(name, package) if name.startswith('.') else name + if fullname not in sys.modules: + parent_name = fullname.rpartition('.')[0] + if parent_name: + parent = __import__(parent_name, fromlist=['__path__']) try: - is_package = loader.is_package(name) - except ImportError: - is_package = False + parent_path = parent.__path__ + except AttributeError as e: + raise ModuleNotFoundError( + f"__path__ attribute not found on {parent_name!r} " + f"while trying to find {fullname!r}", name=fullname) from e else: - is_package = False - return ModuleSpec(name, loader, origin=origin, is_package=bool(is_package)) + parent_path = None + return _find_spec(fullname, parent_path) + else: + module = sys.modules[fullname] + if module is None: + return None + try: + spec = module.__spec__ + except AttributeError: + raise ValueError(f'{name}.__spec__ is not set') from None + else: + if spec is None: + raise ValueError(f'{name}.__spec__ is None') + return spec -def spec_from_file_location(name, location=None, *, loader=None, - submodule_search_locations=None): - """Return a ModuleSpec for the specified module, using file location. +# Normally we would use contextlib.contextmanager. However, this module +# is imported by runpy, which means we want to avoid any unnecessary +# dependencies. Thus we use a class. - CPython: Lib/importlib/_bootstrap_external.py:560 spec_from_file_location - """ - if location is None and loader is None: - return None - if loader is None and location is not None: - loader = _SourceFileLoader(name, str(location)) - if location is not None: - location = os.fspath(location) - try: - location = os.path.abspath(location) - except (OSError, AttributeError): - # AttributeError: os.path (posixpath) can still be mid-import - # when a deferred spec is flushed during interpreter bootstrap, - # so abspath is not bound yet. The unnormalized path is fine. - pass - origin = location if location is not None else getattr(loader, 'path', None) - spec = ModuleSpec(name, loader, origin=origin) - spec._set_fileattr = True - if submodule_search_locations is not None: - spec.submodule_search_locations = list(submodule_search_locations) - elif submodule_search_locations is None and hasattr(loader, 'is_package'): - try: - if loader.is_package(name): - spec.submodule_search_locations = [] - except ImportError: - pass - if spec.submodule_search_locations == []: - if origin: - spec.submodule_search_locations.append(os.path.split(origin)[0]) - return spec +class _incompatible_extension_module_restrictions: + """A context manager that can temporarily skip the compatibility check. + NOTE: This function is meant to accommodate an unusual case; one + which is likely to eventually go away. There's is a pretty good + chance this is not what you were looking for. -def resolve_name(name, package): - """Resolve a relative module name to an absolute one.""" - if not name.startswith('.'): - return name - if not package: - raise ImportError(f'no package specified for {name!r} ' - '(required for relative module names)') - level = 0 - for character in name: - if character != '.': - break - level += 1 - return _resolve_name(name[level:], package, level) + WARNING: Using this function to disable the check can lead to + unexpected behavior and even crashes. It should only be used during + extension module development. + If "disable_check" is True then the compatibility check will not + happen while the context manager is active. Otherwise the check + *will* happen. -def _resolve_name(name, package, level): - bits = package.rsplit('.', level - 1) - if len(bits) < level: - raise ImportError('attempted relative import beyond top-level package') - base = bits[0] - return f'{base}.{name}' if name else base + Normally, extensions that do not support multiple interpreters + may not be imported in a subinterpreter. That implies modules + that do not implement multi-phase init or that explicitly of out. + Likewise for modules import in a subinterpreter with its own GIL + when the extension does not support a per-interpreter GIL. This + implies the module does not have a Py_mod_multiple_interpreters slot + set to Py_MOD_PER_INTERPRETER_GIL_SUPPORTED. + + In both cases, this context manager may be used to temporarily + disable the check for compatible extension modules. + + You can get the same effect as this function by implementing the + basic interface of multi-phase init (PEP 489) and lying about + support for multiple interpreters (or per-interpreter GIL). + """ -class LazyLoader: - """Stub: not used by the unittest.mock import chain.""" + def __init__(self, *, disable_check): + self.disable_check = bool(disable_check) + + def __enter__(self): + self.old = _imp._override_multi_interp_extensions_check(self.override) + return self + + def __exit__(self, *args): + old = self.old + del self.old + _imp._override_multi_interp_extensions_check(old) + + @property + def override(self): + return -1 if self.disable_check else 1 + + +class _LazyModule(types.ModuleType): + + """A subclass of the module type which triggers loading upon attribute access.""" + + def __getattribute__(self, attr): + """Trigger the load of the module and return the attribute.""" + __spec__ = object.__getattribute__(self, '__spec__') + loader_state = __spec__.loader_state + with loader_state['lock']: + # Only the first thread to get the lock should trigger the load + # and reset the module's class. The rest can now getattr(). + if object.__getattribute__(self, '__class__') is _LazyModule: + __class__ = loader_state['__class__'] + + # Reentrant calls from the same thread must be allowed to proceed without + # triggering the load again. + # exec_module() and self-referential imports are the primary ways this can + # happen, but in any case we must return something to avoid deadlock. + if loader_state['is_loading']: + return __class__.__getattribute__(self, attr) + loader_state['is_loading'] = True + + __dict__ = __class__.__getattribute__(self, '__dict__') + + # All module metadata must be gathered from __spec__ in order to avoid + # using mutated values. + # Get the original name to make sure no object substitution occurred + # in sys.modules. + original_name = __spec__.name + # Figure out exactly what attributes were mutated between the creation + # of the module and now. + attrs_then = loader_state['__dict__'] + attrs_now = __dict__ + attrs_updated = {} + for key, value in attrs_now.items(): + # Code that set an attribute may have kept a reference to the + # assigned object, making identity more important than equality. + if key not in attrs_then: + attrs_updated[key] = value + elif id(attrs_now[key]) != id(attrs_then[key]): + attrs_updated[key] = value + __spec__.loader.exec_module(self) + # If exec_module() was used directly there is no guarantee the module + # object was put into sys.modules. + if original_name in sys.modules: + if id(self) != id(sys.modules[original_name]): + raise ValueError(f"module object for {original_name!r} " + "substituted in sys.modules during a lazy " + "load") + # Update after loading since that's what would happen in an eager + # loading situation. + __dict__.update(attrs_updated) + # Finally, stop triggering this method, if the module did not + # already update its own __class__. + if isinstance(self, _LazyModule): + object.__setattr__(self, '__class__', __class__) + + return getattr(self, attr) + + def __delattr__(self, attr): + """Trigger the load and then perform the deletion.""" + # To trigger the load and raise an exception if the attribute + # doesn't exist. + self.__getattribute__(attr) + delattr(self, attr) + + +class LazyLoader(Loader): + + """A loader that creates a module which defers loading until attribute access.""" + + @staticmethod + def __check_eager_loader(loader): + if not hasattr(loader, 'exec_module'): + raise TypeError('loader must define exec_module()') @classmethod def factory(cls, loader): - raise NotImplementedError("importlib.util.LazyLoader is unavailable in gopy") + """Construct a callable which returns the eager loader made lazy.""" + cls.__check_eager_loader(loader) + return lambda *args, **kwargs: cls(loader(*args, **kwargs)) + + def __init__(self, loader): + self.__check_eager_loader(loader) + self.loader = loader + + def create_module(self, spec): + return self.loader.create_module(spec) + + def exec_module(self, module): + """Make the module load lazily.""" + # Threading is only needed for lazy loading, and importlib.util can + # be pulled in at interpreter startup, so defer until needed. + import threading + module.__spec__.loader = self.loader + module.__loader__ = self.loader + # Don't need to worry about deep-copying as trying to set an attribute + # on an object would have triggered the load, + # e.g. ``module.__spec__.loader = None`` would trigger a load from + # trying to access module.__spec__. + loader_state = {} + loader_state['__dict__'] = module.__dict__.copy() + loader_state['__class__'] = module.__class__ + loader_state['lock'] = threading.RLock() + loader_state['is_loading'] = False + module.__spec__.loader_state = loader_state + module.__class__ = _LazyModule + + +__all__ = ['LazyLoader', 'Loader', 'MAGIC_NUMBER', + 'cache_from_source', 'decode_source', 'find_spec', + 'module_from_spec', 'resolve_name', 'source_from_cache', + 'source_hash', 'spec_from_file_location', 'spec_from_loader'] From 71a10dfb60ae0cdc0272e2ce029435cb7e867137 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 02:42:58 +0700 Subject: [PATCH 23/84] marshal: accept memoryview in loads buffer extraction --- module/marshal/module.go | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/module/marshal/module.go b/module/marshal/module.go index fd4c46dc..92ae5588 100644 --- a/module/marshal/module.go +++ b/module/marshal/module.go @@ -158,8 +158,12 @@ func bufferOf(o objects.Object) ([]byte, error) { return v.Bytes(), nil case *objects.ByteArray: return v.Bytes(), nil + case *objects.MemoryView: + // Tobytes() serializes the exposed view (honoring offset/length), + // matching how marshal.loads consumes any bytes-like buffer. + return v.Tobytes().Bytes(), nil } - return nil, fmt.Errorf("TypeError: a bytes-like object is required, not '%T'", o) + return nil, fmt.Errorf("TypeError: a bytes-like object is required, not '%s'", o.Type().Name) } // unwrap converts a Python objects.Object into the native Go form the From 9abc209e35e065619a0c099b14bd91fd2bb85eb7 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 02:47:12 +0700 Subject: [PATCH 24/84] import: consult custom sys.meta_path finders; classmethod bindings compare equal ImportModuleLevel now walks sys.meta_path for finders a program installs, skipping the BuiltinImporter/FrozenImporter/PathFinder entries gopy realizes in Go and driving any spec a custom finder returns through loadFromSpec. This lets test-installed importers (pkgutil's MyTestImporter) satisfy 'import foo'. classmethod_get now stamps methOrigin so two bindings of int.from_bytes compare equal and hash alike, matching meth_richcompare's m_ml pointer test. --- imp/import.go | 96 ++++++++++++++++++++++++++++++++++++ objects/classmethod_descr.go | 11 +++-- objects/function_builtin.go | 15 ++++++ 3 files changed, 117 insertions(+), 5 deletions(-) diff --git a/imp/import.go b/imp/import.go index aef5601b..effd5e91 100644 --- a/imp/import.go +++ b/imp/import.go @@ -62,6 +62,20 @@ func ImportModuleLevel(exec Executor, name, pkgname string, level int) (*objects } } + // 1b. Custom sys.meta_path finders. CPython's _find_spec walks + // sys.meta_path in order; the BuiltinImporter, FrozenImporter and + // PathFinder entries are realized by the Go steps below, so here we + // consult only the additional finders a program (or a test) inserts. + // A finder inserted at meta_path[0] therefore wins over the built-in + // and frozen lookups, matching CPython's ordering. + // + // CPython: Lib/importlib/_bootstrap.py:912 _find_spec + if mod, found, err := metaPathFind(exec, absName); err != nil { + return nil, err + } else if found { + return mod, nil + } + // 2. Frozen module. // CPython: Python/import.c:L1632 import_find_and_load if fm, ok := FindFrozen(absName); ok && fm.Code != nil { @@ -113,6 +127,88 @@ func ImportModuleLevel(exec Executor, name, pkgname string, level int) (*objects return nil, fmt.Errorf("%w: No module named %q", ErrModuleNotFound, absName) } +// metaPathFind consults the custom finders on sys.meta_path for absName. +// It skips the BuiltinImporter, FrozenImporter and PathFinder entries +// (identified by their class __name__), which gopy realizes in Go, and +// calls find_spec(name, path, None) on every other finder. The first +// finder that returns a spec drives loadFromSpec; a None return means the +// finder declined and the walk continues. +// +// CPython: Lib/importlib/_bootstrap.py:912 _find_spec +func metaPathFind(exec Executor, absName string) (*objects.Module, bool, error) { + sysMod, ok := GetModule("sys") + if !ok { + return nil, false, nil + } + mpObj, _ := sysMod.Dict().GetItem(objects.NewStr("meta_path")) + mp, _ := mpObj.(*objects.List) + if mp == nil || mp.Len() == 0 { + return nil, false, nil + } + // The parent package's __path__ becomes the `path` argument for a + // submodule import, mirroring _find_and_load's parent.__path__ read. + // + // CPython: Lib/importlib/_bootstrap.py:1227 path = parent_module.__path__ + pathArg := objects.None() + if parent, _ := splitParent(absName); parent != "" { + if pm, ok := GetModule(parent); ok { + if pp, err := pm.Dict().GetItem(objects.NewStr("__path__")); err == nil && pp != nil { + pathArg = pp + } + } + } + nameObj := objects.NewStr(absName) + for i := 0; i < mp.Len(); i++ { + finder := mp.Item(i) + if isBuiltinFinder(finder) { + continue + } + findSpec, err := objects.GetAttr(finder, objects.NewStr("find_spec")) + if err != nil { + // A legacy finder without find_spec does not participate; + // CPython's _find_spec skips it the same way. + continue + } + spec, err := objects.Call(findSpec, objects.NewTuple([]objects.Object{nameObj, pathArg, objects.None()}), nil) + if err != nil { + return nil, false, err + } + if spec == nil || objects.IsNone(spec) { + continue + } + mod, err := loadFromSpec(exec, absName, spec) + if err != nil { + return nil, false, err + } + parent, tail := splitParent(absName) + bindOnParent(parent, tail, mod) + return mod, true, nil + } + return nil, false, nil +} + +// isBuiltinFinder reports whether finder is one of the three importers +// gopy realizes in Go (BuiltinImporter, FrozenImporter, PathFinder). +// Those are class objects exposing __name__; the custom finders programs +// install on meta_path are instances that do not. +// +// CPython: Lib/importlib/_bootstrap.py:736 BuiltinImporter / :976 PathFinder +func isBuiltinFinder(finder objects.Object) bool { + nameAttr, err := objects.GetAttr(finder, objects.NewStr("__name__")) + if err != nil { + return false + } + name, ok := nameAttr.(*objects.Unicode) + if !ok { + return false + } + switch name.Value() { + case "BuiltinImporter", "FrozenImporter", "PathFinder", "WindowsRegistryFinder": + return true + } + return false +} + // resolveAbsName converts a relative import (level > 0) to an // absolute module name using pkgname as the anchor. // diff --git a/objects/classmethod_descr.go b/objects/classmethod_descr.go index 8e007c78..af4b9eb3 100644 --- a/objects/classmethod_descr.go +++ b/objects/classmethod_descr.go @@ -105,11 +105,12 @@ func classMethodDescrGet2(descr Object, obj Object, ownerType *Type) (Object, er } Incref(t) bf := &BuiltinFunction{ - Name: d.def.Name, - Conv: MethVarargs | MethKeywords, - Self: t, - ownsSelf: true, - Doc: d.def.Doc, + Name: d.def.Name, + Conv: MethVarargs | MethKeywords, + Self: t, + ownsSelf: true, + methOrigin: d, + Doc: d.def.Doc, Fn: func(args []Object, kwargs map[string]Object) (Object, error) { return cfunctionCall(cf, args, kwargs) }, diff --git a/objects/function_builtin.go b/objects/function_builtin.go index 0b0ce57f..1485f9de 100644 --- a/objects/function_builtin.go +++ b/objects/function_builtin.go @@ -73,6 +73,16 @@ type BuiltinFunction struct { // CPython: Objects/descrobject.c:230 method_get (PyCMethod_New) boundDescr *MethodDescr + // methOrigin is the stable descriptor a builtin method was minted from + // when no *MethodDescr drives its call path: classmethod_get binds a + // classmethod_descriptor (PyCMethod_New) into a builtin_function_or_method + // whose m_ml is the descriptor's PyMethodDef, shared across every binding. + // methFuncIdentical / builtinFunctionHash use it as the m_ml proxy so + // int.from_bytes == int.from_bytes even though the bindings are distinct. + // + // CPython: Objects/descrobject.c:95 classmethod_get (a->m_ml == b->m_ml) + methOrigin Object + // kwParams, when non-nil, names every keyword the Argument Clinic // signature accepts. builtinFunctionVectorcall runs the AC // extraneous-keyword scan over the original kwnames objects before @@ -338,6 +348,9 @@ func methFuncIdentical(a, b *BuiltinFunction) bool { if a.boundDescr != nil || b.boundDescr != nil { return a.boundDescr == b.boundDescr } + if a.methOrigin != nil || b.methOrigin != nil { + return a.methOrigin == b.methOrigin + } return a == b } @@ -384,6 +397,8 @@ func builtinFunctionHash(o Object) (int64, error) { var err error if bf.boundDescr != nil { y, err = identityHash(bf.boundDescr) + } else if bf.methOrigin != nil { + y, err = identityHash(bf.methOrigin) } else { y, err = identityHash(bf) } From bd1d907b22b0c03c8e594c2fb399688aa0172c59 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 03:32:52 +0700 Subject: [PATCH 25/84] imp: faithful module-shadowing diagnostics + config sys_path_0 Port _PyModule_IsPossiblyShadowing to read the startup-captured leading sys.path entry (config->sys_path_0) instead of live sys.path[0], so a script that mutates sys.path after startup keeps consistent shadowing detection. The leading entry is now prepended to sys.path after site.main runs, matching CPython, so a -c run keeps sys.path[0] == '' rather than letting site.removeduppaths absolutize it. Set spec._initializing around module exec so a self-importing module hits the circular-import and 'consider renaming' hints. Pass the live __name__ object through to PySet_Contains so an unhashable str subclass raises, and guard stdlib_module_names with PyAnySet_Check. Module getattro now formats with %U-style literal quotes; os.__getattr__ miss uses single quotes. --- cmd/gopy/main.go | 90 +- errors/api.go | 24 + imp/import.go | 26 + imp/pathfinder.go | 66 +- imp/shadowing.go | 279 + longlist.py | 14336 ++++++++++++++++++++++++++++ module/os/module.go | 7 +- module/sys/module.go | 27 + module/sys/stdlib_module_names.go | 305 + module/sys/sys.go | 10 +- objects/module.go | 21 +- vm/eval_helpers.go | 13 + vm/eval_import.go | 322 +- 13 files changed, 15449 insertions(+), 77 deletions(-) create mode 100644 imp/shadowing.go create mode 100644 longlist.py create mode 100644 module/sys/stdlib_module_names.go diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 9ddaefd7..12067623 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -103,6 +103,7 @@ func run(args []string, stdout, stderr *os.File) int { modName string hasC, hasM bool xOptions []string + safePath bool ) opts: @@ -128,6 +129,18 @@ opts: break opts case 'X': xOptions = append(xOptions, st.OptArg) + case 'P': + // -P sets safe_path: the script directory / cwd / '' is not + // prepended to sys.path[0]. + // + // CPython: Python/initconfig.c:2098 config_parse_cmdline ('P') + safePath = true + case 'I': + // -I (isolated) implies -P plus -E/-s; the safe_path effect on + // sys.path[0] is what the shadowing tests exercise. + // + // CPython: Python/initconfig.c:2080 config_parse_cmdline ('I') + safePath = true default: // Other CPython flags (-b, -B, -O, -W, ...) are accepted for // option-set parity. Wiring each to the runtime config lands @@ -144,6 +157,17 @@ opts: codecs.SetDevMode(true) } + // safe_path: -P, -I, or PYTHONSAFEPATH suppresses prepending the + // script directory / cwd / "" to sys.path[0], and is exposed as + // sys.flags.safe_path. installPathFinder reads safePathMode to skip + // the unsafe leading entry. + // + // CPython: Python/initconfig.c:1828 config_init_safe_path + if safePath || os.Getenv("PYTHONSAFEPATH") != "" { + safePathMode = true + sys.SetSafePath(true) + } + switch { case showVersion: fmt.Fprintln(stdout, build.VersionString()) @@ -164,6 +188,25 @@ opts: return runInteractive(stdout, stderr) } +// safePathMode records whether -P / -I / PYTHONSAFEPATH was supplied, so +// installPathFinder omits the unsafe leading sys.path[0] entry. +// +// CPython: Python/initconfig.c:1828 config_init_safe_path +var safePathMode bool + +// sysPath0Entry / sysPath0Present hold the leading sys.path entry +// (script directory, or "" for -c / -m / interactive). CPython prepends +// config->sys_path_0 to sys.path AFTER site.main() runs, so +// site.removeduppaths() never rewrites a "" entry into an absolute cwd. +// gopy mirrors that: installPathFinder records the entry here, and +// prependSysPath0 inserts it once site has run. +// +// CPython: Modules/main.c:pymain_run_python (sys.path[0] insertion) +var ( + sysPath0Entry string + sysPath0Present bool +) + // hasXOption reports whether the -X option named key was supplied, // matching against the part before any '=' so "-X dev" and "-X dev=1" // both count. @@ -189,12 +232,37 @@ func hasXOption(xOptions []string, key string) bool { // CPython: Python/initconfig.c:1734 _PyConfig_InitPathConfig // CPython: Lib/importlib/_bootstrap_external.py:1196 PathFinder func installPathFinder(scriptPath string) { + // The leading sys.path entry (script dir, or "" for -c / -m / + // interactive) is NOT placed in `paths` here: CPython inserts + // config->sys_path_0 after site.main() runs, so site.removeduppaths() + // does not rewrite a "" entry into an absolute cwd. prependSysPath0 + // adds it once site has run. var paths []string switch { + case safePathMode: + // safe_path drops the leading script-dir / cwd / "" entry so an + // importable name is resolved only from PYTHONPATH and the stdlib. + // CPython leaves config->sys_path_0 unset, which disables the + // module-shadowing heuristic. + // + // CPython: Python/initconfig.c:1828 config_init_safe_path + sysPath0Present = false + imp.SetConfigSysPath0("", false) case scriptPath != "": - paths = append(paths, filepath.Dir(scriptPath)) + // config->sys_path_0 for a script is the ABSOLUTE directory of the + // script file (CPython resolves it), so the shadowing check and the + // live sys.path[0] both use an absolute path. + dir := filepath.Dir(scriptPath) + if abs, err := filepath.Abs(dir); err == nil { + dir = abs + } + sysPath0Entry = dir + sysPath0Present = true + imp.SetConfigSysPath0(dir, true) default: - paths = append(paths, "") + sysPath0Entry = "" + sysPath0Present = true + imp.SetConfigSysPath0("", true) } if env := os.Getenv("PYTHONPATH"); env != "" { for _, p := range strings.Split(env, string(os.PathListSeparator)) { @@ -231,6 +299,20 @@ func installPathFinder(scriptPath string) { imp.SetLivePathHook(sys.LivePath) } +// prependSysPath0 inserts the leading sys.path entry (config->sys_path_0) +// recorded by installPathFinder. CPython does this after site.main() +// runs, so the entry (notably "" for -c) is never absolutized by +// site.removeduppaths(). Call it once the site bootstrap has completed. +// +// CPython: Modules/main.c:pymain_run_python (sys.path[0] insertion) +func prependSysPath0() { + if !sysPath0Present { + return + } + cur := sys.LivePath() + sys.SetPath(append([]string{sysPath0Entry}, cur...)) +} + // bootstrapEncodings imports the encodings package so its // search_function lands in the codec search path. CPython does this // from _PyCodec_Init at the tail of interpreter startup, after the @@ -442,6 +524,7 @@ func runSource(src string, stdout, stderr *os.File) int { if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { return rc } + prependSysPath0() rc := pythonrun.RunSimpleString(ts, src, mainGlobals, stderr) gc.RunShutdownFinalizers() pythonrun.FlushStdFiles() @@ -471,6 +554,7 @@ func runModule(modName string, modArgs []string, stdout, stderr *os.File) int { if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { return rc } + prependSysPath0() // Equivalent of CPython's pymain_run_module which calls // runpy._run_module_as_main(modName) on the Python side. src := fmt.Sprintf("import runpy\nrunpy._run_module_as_main(%q)\n", modName) @@ -508,6 +592,7 @@ func runFile(path string, stdout, stderr *os.File) int { if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { return rc } + prependSysPath0() // A vendored test runs under "test."; regrtest imports it as a // normal module, so its __spec__ is a real ModuleSpec. Build the same // file-location spec here so code that resolves the module by name and @@ -623,6 +708,7 @@ func runInteractive(stdout, stderr *os.File) int { if rc := bootstrapSite(ts, mainGlobals, stderr); rc != 0 { return rc } + prependSysPath0() rc := pythonrun.InteractiveLoop(ts, os.Stdin, stdout, stderr, mainGlobals) pythonrun.FlushStdFiles() if rc != 0 { diff --git a/errors/api.go b/errors/api.go index f42fadc3..e6c82ce2 100644 --- a/errors/api.go +++ b/errors/api.go @@ -48,6 +48,30 @@ func SetModuleNotFound(ts *state.Thread, name string) { Raise(ts, exc) } +// SetImportErrorWithNameFrom raises ImportError(msg, name=modName, +// path=origin, name_from=nameFrom), stamping the three members the +// IMPORT_FROM diagnostic promises so a caught exception exposes +// exc.name / exc.path / exc.name_from. Empty modName/origin leave the +// corresponding member unset (read back as None), matching the NULL +// arguments _PyErr_SetImportErrorWithNameFrom forwards to new_importerror. +// +// CPython: Python/errors.c:1152 _PyErr_SetImportErrorWithNameFrom +func SetImportErrorWithNameFrom(ts *state.Thread, msg, modName, origin, nameFrom string) { + exc := New(PyExc_ImportError, objects.NewTuple([]objects.Object{objects.NewStr(msg)})) + d := exc.EnsureAttrDict() + _ = d.SetItem(objects.NewStr("msg"), objects.NewStr(msg)) + if modName != "" { + _ = d.SetItem(objects.NewStr("name"), objects.NewStr(modName)) + } + if origin != "" { + _ = d.SetItem(objects.NewStr("path"), objects.NewStr(origin)) + } + if nameFrom != "" { + _ = d.SetItem(objects.NewStr("name_from"), objects.NewStr(nameFrom)) + } + Raise(ts, exc) +} + // Format raises an exception built from a printf-style template. // Returns nil so callers can `return errors.Format(ts, ...)`. // diff --git a/imp/import.go b/imp/import.go index effd5e91..92b75f20 100644 --- a/imp/import.go +++ b/imp/import.go @@ -26,6 +26,32 @@ func ImportModule(exec Executor, name string) (*objects.Module, error) { return ImportModuleLevel(exec, name, "", 0) } +// ImportModuleLevelObject imports name relative to pkgname at the given +// level and returns whatever sys.modules holds, which need not be a +// module: a test (or pathological code) can inject an arbitrary object +// under a name, and CPython's import returns it unchanged so the +// IMPORT_FROM / _handle_fromlist that follows operates through plain +// attribute access. Normal imports always yield a real module, in which +// case this behaves exactly like ImportModuleLevel. +// +// CPython: Python/import.c:1561 PyImport_ImportModuleLevelObject +func ImportModuleLevelObject(exec Executor, name, pkgname string, level int) (objects.Object, error) { + absName, err := resolveAbsName(name, pkgname, level) + if err != nil { + return nil, err + } + if raw, present := GetModuleRaw(absName); present { + if objects.IsNone(raw) { + return nil, fmt.Errorf("ImportError: import of %q halted; None in sys.modules", absName) + } + if _, ok := raw.(*objects.Module); !ok { + // A non-module cached entry: return it verbatim. + return raw, nil + } + } + return ImportModuleLevel(exec, name, pkgname, level) +} + // ImportModuleLevel imports name relative to pkgname at the given // level. level=0 is an absolute import; level>0 is relative. // diff --git a/imp/pathfinder.go b/imp/pathfinder.go index e365a5fe..8f87ecb4 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -502,6 +502,12 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam return nil, fmt.Errorf("imp: loadAsPackage %q: __package__: %w", name, err) } AddModule(name, mod) + // CPython attaches __spec__ before exec_module; do the same so an + // __init__.py that imports from its own package during init reads + // spec.has_location / spec.origin. + // + // CPython: Lib/importlib/_bootstrap.py:573 module_from_spec + attachSpecAttrs(exec, mod, name, initFile, []string{pkgDir}) src, err := os.ReadFile(initFile) //nolint:gosec // initFile is filepath.Join of a trusted PathFinder.Paths entry. if err != nil { @@ -511,11 +517,13 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam if err != nil { return nil, fmt.Errorf("imp: loadAsPackage %q: compile: %w", name, err) } - if _, err := exec.ExecCode(code, mod); err != nil { + setSpecInitializing(mod, true) + _, execErr := exec.ExecCode(code, mod) + setSpecInitializing(mod, false) + if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsPackage %q: exec: %w", name, err) + return nil, fmt.Errorf("imp: loadAsPackage %q: exec: %w", name, execErr) } - attachSpecAttrs(exec, mod, name, initFile, []string{pkgDir}) // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so an `__init__.py` that reassigns its own entry // (rare for packages, but the same shape as decimal/_pydecimal). @@ -553,11 +561,14 @@ func loadAsPackageBytecode(exec Executor, initFile, pkgDir, name string) (*objec return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: __package__: %w", name, err) } AddModule(name, mod) - if _, err := exec.ExecCode(code, mod); err != nil { + attachSpecAttrs(exec, mod, name, initFile, []string{pkgDir}) + setSpecInitializing(mod, true) + _, execErr := exec.ExecCode(code, mod) + setSpecInitializing(mod, false) + if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: exec: %w", name, err) + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: exec: %w", name, execErr) } - attachSpecAttrs(exec, mod, name, initFile, []string{pkgDir}) if final, ok := GetModule(name); ok { return final, nil } @@ -585,11 +596,14 @@ func loadAsModuleBytecode(exec Executor, file, name, parent string) (*objects.Mo return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: __package__: %w", name, err) } AddModule(name, mod) - if _, err := exec.ExecCode(code, mod); err != nil { + attachSpecAttrs(exec, mod, name, file, nil) + setSpecInitializing(mod, true) + _, execErr := exec.ExecCode(code, mod) + setSpecInitializing(mod, false) + if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: exec: %w", name, err) + return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: exec: %w", name, execErr) } - attachSpecAttrs(exec, mod, name, file, nil) if final, ok := GetModule(name); ok { return final, nil } @@ -660,6 +674,12 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str return nil, fmt.Errorf("imp: loadAsModule %q: __package__: %w", name, err) } AddModule(name, mod) + // CPython sets __spec__ in module_from_spec before exec_module runs the + // body, so a module that imports from itself during initialization can + // read spec.has_location / spec.origin. Attach before exec. + // + // CPython: Lib/importlib/_bootstrap.py:573 module_from_spec + attachSpecAttrs(exec, mod, name, file, nil) src, err := os.ReadFile(file) //nolint:gosec // file is filepath.Join of a trusted PathFinder.Paths entry. if err != nil { @@ -669,11 +689,13 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str if err != nil { return nil, fmt.Errorf("imp: loadAsModule %q: compile: %w", name, err) } - if _, err := exec.ExecCode(code, mod); err != nil { + setSpecInitializing(mod, true) + _, execErr := exec.ExecCode(code, mod) + setSpecInitializing(mod, false) + if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w", name, err) + return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w", name, execErr) } - attachSpecAttrs(exec, mod, name, file, nil) // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so a module body that reassigns its own entry // (`sys.modules[__name__] = other`, e.g. decimal/_pydecimal) wins. @@ -715,6 +737,26 @@ func attachSpecAttrs(exec Executor, mod *objects.Module, name, origin string, se flushPendingSpecs(util) } +// setSpecInitializing flips mod.__spec__._initializing. CPython's +// module_from_spec wraps exec_module in `spec._initializing = True` / +// `finally: spec._initializing = False`, so a module that imports from +// itself during its own body sees a partially-initialized spec. gopy +// mirrors that around ExecCode so the circular-import and shadowing +// hints in _Py_module_getattro_impl / _PyEval_ImportFrom fire correctly. +// +// CPython: Lib/importlib/_bootstrap.py:573 module_from_spec +func setSpecInitializing(mod *objects.Module, on bool) { + spec, err := mod.Dict().GetItem(objects.NewStr("__spec__")) + if err != nil || spec == nil || objects.IsNone(spec) { + return + } + var v objects.Object = objects.False() + if on { + v = objects.True() + } + _ = objects.SetAttr(spec, objects.NewStr("_initializing"), v) +} + // attachNamespaceSpec binds a PEP 420 namespace ModuleSpec (loader None, // origin None, submodule_search_locations = the portions) onto mod. Like // the file path it defers when importlib.util is not importable yet. diff --git a/imp/shadowing.go b/imp/shadowing.go new file mode 100644 index 00000000..c736dd42 --- /dev/null +++ b/imp/shadowing.go @@ -0,0 +1,279 @@ +package imp + +import ( + "fmt" + "os" + "strings" + + "github.com/tamnd/gopy/objects" +) + +// optionalAttr ports PyObject_GetOptionalAttr for the shadowing helpers: +// it returns (val, true, nil) on success and (nil, false, nil) when the +// attribute is missing (AttributeError). Any non-AttributeError failure +// propagates as the third return. +// +// CPython: Objects/object.c:1324 PyObject_GetOptionalAttr +func optionalAttr(o objects.Object, name string) (objects.Object, bool, error) { + v, err := objects.GetAttr(o, objects.NewStr(name)) + if err == nil { + return v, true, nil + } + if strings.Contains(err.Error(), "AttributeError") { + return nil, false, nil + } + return nil, false, err +} + +// SpecFileOrigin ports _PyModuleSpec_GetFileOrigin: returns the spec's +// origin string only when spec.has_location is truthy and spec.origin is +// a str. The bool reports whether a location origin was found. +// +// CPython: Objects/moduleobject.c:892 _PyModuleSpec_GetFileOrigin +func SpecFileOrigin(spec objects.Object) (string, bool, error) { + hasLoc, found, err := optionalAttr(spec, "has_location") + if err != nil || !found { + return "", false, err + } + if !objects.IsTrue(hasLoc) { + return "", false, nil + } + originObj, found, err := optionalAttr(spec, "origin") + if err != nil || !found { + return "", false, err + } + origin, ok := originObj.(*objects.Unicode) + if !ok { + return "", false, nil + } + return origin.Value(), true, nil +} + +// SpecIsInitializing ports _PyModuleSpec_IsInitializing: spec._initializing +// is truthy. +// +// CPython: Objects/moduleobject.c:858 _PyModuleSpec_IsInitializing +func SpecIsInitializing(spec objects.Object) (bool, error) { + v, found, err := optionalAttr(spec, "_initializing") + if err != nil || !found { + return false, err + } + return objects.IsTrue(v), nil +} + +// ModuleIsPossiblyShadowing ports _PyModule_IsPossiblyShadowing: the +// module at origin could shadow a same-named module later on the search +// path. The check is: not sys.flags.safe_path and +// dirname(origin minus a trailing /__init__.py) == (sys.path[0] or cwd). +// +// CPython: Objects/moduleobject.c:923 _PyModule_IsPossiblyShadowing +func ModuleIsPossiblyShadowing(originFound bool, origin string) (bool, error) { + if !originFound { + return false, nil + } + if safePathEnabled() { + return false, nil + } + root := origin + sep := strings.LastIndex(root, string(os.PathSeparator)) + if sep < 0 { + return false, nil + } + // A package origin ends in __init__.py; step one directory up. + if root[sep+1:] == "__init__.py" { + root = root[:sep] + sep = strings.LastIndex(root, string(os.PathSeparator)) + if sep < 0 { + return false, nil + } + } + root = root[:sep] + + sysPath0, ok := sysPathZero() + if !ok { + return false, nil + } + if sysPath0 == "" { + cwd, err := os.Getwd() + if err != nil { + return false, nil + } + sysPath0 = cwd + } + return sysPath0 == root, nil +} + +// safePathEnabled reports whether sys.flags.safe_path is truthy. +// +// CPython: Objects/moduleobject.c:937 config->safe_path +func safePathEnabled() bool { + sysMod, ok := GetModule("sys") + if !ok { + return false + } + flags, err := objects.GetAttr(sysMod, objects.NewStr("flags")) + if err != nil { + return false + } + sp, err := objects.GetAttr(flags, objects.NewStr("safe_path")) + if err != nil { + return false + } + return objects.IsTrue(sp) +} + +// configSysPath0 holds the startup-captured leading sys.path entry, the +// equivalent of CPython's config->sys_path_0. The shadowing check uses +// this snapshot, NOT live sys.path[0], so a script that mutates sys.path +// after startup does not change shadowing detection. +// +// CPython: Python/initconfig.c config->sys_path_0 +var ( + configSysPath0 string + configSysPath0Set bool +) + +// SetConfigSysPath0 records the startup leading sys.path entry. The bool +// reports whether the interpreter installed one at all (false under +// safe_path, where CPython leaves config->sys_path_0 NULL). +func SetConfigSysPath0(path string, present bool) { + configSysPath0 = path + configSysPath0Set = present +} + +// sysPathZero returns config->sys_path_0. The bool is false when no +// leading entry was captured (e.g. safe_path). +// +// CPython: Objects/moduleobject.c:967 config->sys_path_0 +func sysPathZero() (string, bool) { + if !configSysPath0Set { + return "", false + } + return configSysPath0, true +} + +// StdlibModuleNamesContains reports whether modName is in +// sys.stdlib_module_names. modName is passed as the live object (not a +// Go string) so an unhashable __name__ raises through PySet_Contains +// exactly as CPython does. The lookup is silent when stdlib_module_names +// is missing or is not a set/frozenset (PyAnySet_Check guards the call). +// +// CPython: Objects/moduleobject.c:1059 PySet_Contains(stdlib_modules, mod_name) +func StdlibModuleNamesContains(modName objects.Object) (bool, error) { + sysMod, ok := GetModule("sys") + if !ok { + return false, nil + } + namesObj, found, err := optionalAttr(sysMod, "stdlib_module_names") + if err != nil || !found { + return false, nil + } + if !anySetCheck(namesObj) { + return false, nil + } + contains, err := objects.Contains(namesObj, modName) + if err != nil { + return false, err + } + return contains, nil +} + +// anySetCheck ports PyAnySet_Check: the object is a set or frozenset (or +// a subclass of either). +// +// CPython: Include/cpython/setobject.h PyAnySet_Check +func anySetCheck(o objects.Object) bool { + t := o.Type() + return objects.IsSubtype(t, objects.SetType) || objects.IsSubtype(t, objects.FrozensetType) +} + +// moduleGetattrError ports the error tail of _Py_module_getattro_impl: +// after a generic-attribute miss with no PEP 562 __getattr__, it builds +// the best-effort AttributeError, surfacing the stdlib-shadowing and +// circular-import hints. It returns a Go error whose message the objects +// layer synthesizes into the AttributeError. It is wired into +// objects.ModuleAttrErrorHook so module.go can reach the import system's +// spec helpers without an import cycle. +// +// CPython: Objects/moduleobject.c:1024 _Py_module_getattro_impl (error tail) +func moduleGetattrError(m *objects.Module, name string) error { + d := m.Dict() + + // __name__ must be a str (or str subclass); otherwise the generic + // "module has no attribute" message applies. CPython uses PyUnicode_Check + // here, so a str subclass passes. + modNameObj, _ := d.GetItem(objects.NewStr("__name__")) + if modNameObj == nil || !objects.IsSubtype(modNameObj.Type(), objects.StrType()) { + return fmt.Errorf("AttributeError: module has no attribute '%s'", name) + } + modName := unicodeContents(modNameObj) + nameQ := quoteU(name) + modQ := quoteU(modName) + + spec, serr := d.GetItem(objects.NewStr("__spec__")) + if serr != nil || spec == nil || objects.IsNone(spec) { + return fmt.Errorf("AttributeError: module %s has no attribute %s", modQ, nameQ) + } + + origin, originFound, oerr := SpecFileOrigin(spec) + if oerr != nil { + return oerr + } + shadowing, sherr := ModuleIsPossiblyShadowing(originFound, origin) + if sherr != nil { + return sherr + } + shadowingStdlib := false + if shadowing { + c, cerr := StdlibModuleNamesContains(modNameObj) + if cerr != nil { + return cerr + } + shadowingStdlib = c + } + + if shadowingStdlib { + return fmt.Errorf("AttributeError: module %s has no attribute %s (consider renaming %s since it has the same name as the standard library module named %s and prevents importing that standard library module)", + modQ, nameQ, quoteU(origin), modQ) + } + + initializing, ierr := SpecIsInitializing(spec) + if ierr != nil { + return ierr + } + switch { + case initializing && shadowing: + return fmt.Errorf("AttributeError: module %s has no attribute %s (consider renaming %s if it has the same name as a library you intended to import)", + modQ, nameQ, quoteU(origin)) + case initializing && originFound: + return fmt.Errorf("AttributeError: partially initialized module %s from %s has no attribute %s (most likely due to a circular import)", + modQ, quoteU(origin), nameQ) + case initializing: + return fmt.Errorf("AttributeError: partially initialized module %s has no attribute %s (most likely due to a circular import)", + modQ, nameQ) + default: + return fmt.Errorf("AttributeError: module %s has no attribute %s", modQ, nameQ) + } +} + +// unicodeContents returns the string contents of a str (or str subclass) +// object, mirroring how CPython's %U formats a PyUnicode payload. +func unicodeContents(o objects.Object) string { + if u, ok := o.(*objects.Unicode); ok { + return u.Value() + } + if s, err := objects.Str(o); err == nil { + return s + } + return "" +} + +// quoteU wraps s in single quotes, matching the literal 'quotes' the +// CPython getattro format strings put around each %U substitution. +func quoteU(s string) string { return "'" + s + "'" } + +// init wires the module-getattro error builder into the objects package +// so module attribute misses surface the import-system shadowing hints. +func init() { + objects.ModuleAttrErrorHook = moduleGetattrError +} diff --git a/longlist.py b/longlist.py new file mode 100644 index 00000000..767c45cc --- /dev/null +++ b/longlist.py @@ -0,0 +1,14336 @@ +d = [ +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", +"", 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quotes). CPython's os.py has no __getattr__, so a missing + // attribute raises "module 'os' has no attribute 'X'". + // + // CPython: Objects/moduleobject.c:1024 _Py_module_getattro_impl + return nil, fmt.Errorf("AttributeError: module 'os' has no attribute '%s'", name) } pathMod := osPathModule() if err := m.Dict().SetItem(objects.NewStr("path"), pathMod); err != nil { diff --git a/module/sys/module.go b/module/sys/module.go index 9906cea3..ec3fd1ab 100644 --- a/module/sys/module.go +++ b/module/sys/module.go @@ -88,6 +88,30 @@ func SetPath(path []string) { } } +// pendingSafePath records the safe_path flag supplied on the command +// line (-P / -I / PYTHONSAFEPATH) before sys is built. buildModule +// reads it when stamping sys.flags; SetSafePath also refreshes the live +// flags struct-sequence when sys is already imported. +// +// CPython: Python/initconfig.c:1828 config_init_safe_path +var pendingSafePath bool + +// SetSafePath records safe_path and, when sys is already live, rebuilds +// sys.flags so sys.flags.safe_path reads True. +// +// CPython: Python/sysmodule.c:3478 set_flags_from_config (safe_path) +func SetSafePath(on bool) { + pendingSafePath = on + if md := liveSysDict(); md != nil { + cfg := &initconfig.PyConfig{} + cfg.InitPythonConfig() + if on { + cfg.SafePath = 1 + } + _ = md.SetItem(objects.NewStr("flags"), makeFlags(cfg)) + } +} + // LivePath returns the current sys.path entries as a Go slice, or nil // when sys has not been imported yet (PathFinder then falls back to // its static Paths snapshot, which is what unit tests that drive @@ -302,6 +326,9 @@ func buildModule() (*objects.Module, error) { // CPython: Python/sysmodule.c:3478 set_flags_from_config defaultCfg := &initconfig.PyConfig{} defaultCfg.InitPythonConfig() + if pendingSafePath { + defaultCfg.SafePath = 1 + } if err := setItem(md, "flags", makeFlags(defaultCfg)); err != nil { return nil, err } diff --git a/module/sys/stdlib_module_names.go b/module/sys/stdlib_module_names.go new file mode 100644 index 00000000..b07c7c5f --- /dev/null +++ b/module/sys/stdlib_module_names.go @@ -0,0 +1,305 @@ +// Code generated from CPython Python/stdlib_module_names.h. DO NOT EDIT. +// +// CPython: Python/stdlib_module_names.h _Py_stdlib_module_names +package sys + +// stdlibModuleNames is the verbatim list backing sys.stdlib_module_names. +var stdlibModuleNames = []string{ + "__future__", + "_abc", + "_aix_support", + "_android_support", + "_apple_support", + "_ast", + "_ast_unparse", + "_asyncio", + "_bisect", + "_blake2", + "_bz2", + "_codecs", + "_codecs_cn", + "_codecs_hk", + "_codecs_iso2022", + "_codecs_jp", + "_codecs_kr", + "_codecs_tw", + "_collections", + "_collections_abc", + "_colorize", + "_compat_pickle", + "_contextvars", + "_csv", + "_ctypes", + "_curses", + "_curses_panel", + "_datetime", + "_dbm", + "_decimal", + "_elementtree", + "_frozen_importlib", + "_frozen_importlib_external", + "_functools", + "_gdbm", + "_hashlib", + "_heapq", + "_hmac", + "_imp", + "_interpchannels", + "_interpqueues", + "_interpreters", + "_io", + "_ios_support", + "_json", + "_locale", + "_lsprof", + "_lzma", + "_markupbase", + "_md5", + "_multibytecodec", + "_multiprocessing", + "_opcode", + "_opcode_metadata", + "_operator", + "_osx_support", + "_overlapped", + "_pickle", + "_posixshmem", + "_posixsubprocess", + "_py_abc", + "_py_warnings", + "_pydatetime", + "_pydecimal", + "_pyio", + "_pylong", + "_pyrepl", + "_queue", + "_random", + "_remote_debugging", + "_scproxy", + "_sha1", + "_sha2", + "_sha3", + "_signal", + "_sitebuiltins", + "_socket", + "_sqlite3", + "_sre", + "_ssl", + "_stat", + "_statistics", + "_string", + "_strptime", + "_struct", + "_suggestions", + "_symtable", + "_sysconfig", + "_thread", + "_threading_local", + "_tkinter", + "_tokenize", + "_tracemalloc", + "_types", + "_typing", + "_uuid", + "_warnings", + "_weakref", + "_weakrefset", + "_winapi", + "_wmi", + "_zoneinfo", + "_zstd", + "abc", + "annotationlib", + "antigravity", + "argparse", + "array", + "ast", + "asyncio", + "atexit", + "base64", + "bdb", + "binascii", + "bisect", + "builtins", + "bz2", + "cProfile", + "calendar", + "cmath", + "cmd", + "code", + "codecs", + "codeop", + "collections", + "colorsys", + "compileall", + "compression", + "concurrent", + "configparser", + "contextlib", + "contextvars", + "copy", + "copyreg", + "csv", + "ctypes", + "curses", + "dataclasses", + "datetime", + "dbm", + "decimal", + "difflib", + "dis", + "doctest", + "email", + "encodings", + "ensurepip", + "enum", + "errno", + "faulthandler", + "fcntl", + "filecmp", + "fileinput", + "fnmatch", + "fractions", + "ftplib", + "functools", + "gc", + "genericpath", + "getopt", + "getpass", + "gettext", + "glob", + "graphlib", + "grp", + "gzip", + "hashlib", + "heapq", + "hmac", + "html", + "http", + "idlelib", + "imaplib", + "importlib", + "inspect", + "io", + "ipaddress", + "itertools", + "json", + "keyword", + "linecache", + "locale", + "logging", + "lzma", + "mailbox", + "marshal", + "math", + "mimetypes", + "mmap", + "modulefinder", + "msvcrt", + "multiprocessing", + "netrc", + "nt", + "ntpath", + "nturl2path", + "numbers", + "opcode", + "operator", + "optparse", + "os", + "pathlib", + "pdb", + "pickle", + "pickletools", + "pkgutil", + "platform", + "plistlib", + "poplib", + "posix", + "posixpath", + "pprint", + "profile", + "pstats", + "pty", + "pwd", + "py_compile", + "pyclbr", + "pydoc", + "pydoc_data", + "pyexpat", + "queue", + "quopri", + "random", + "re", + "readline", + "reprlib", + "resource", + "rlcompleter", + "runpy", + "sched", + "secrets", + "select", + "selectors", + "shelve", + "shlex", + "shutil", + "signal", + "site", + "smtplib", + "socket", + "socketserver", + "sqlite3", + "sre_compile", + "sre_constants", + "sre_parse", + "ssl", + "stat", + "statistics", + "string", + "stringprep", + "struct", + "subprocess", + "symtable", + "sys", + "sysconfig", + "syslog", + "tabnanny", + "tarfile", + "tempfile", + "termios", + "textwrap", + "this", + "threading", + "time", + "timeit", + "tkinter", + "token", + "tokenize", + "tomllib", + "trace", + "traceback", + "tracemalloc", + "tty", + "turtle", + "turtledemo", + "types", + "typing", + "unicodedata", + "unittest", + "urllib", + "uuid", + "venv", + "warnings", + "wave", + "weakref", + "webbrowser", + "winreg", + "winsound", + "wsgiref", + "xml", + "xmlrpc", + "zipapp", + "zipfile", + "zipimport", + "zlib", + "zoneinfo", +} diff --git a/module/sys/sys.go b/module/sys/sys.go index a5127b16..cf9d623f 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -76,7 +76,15 @@ func Init() (*objects.Dict, error) { if err := setItem(d, "builtin_module_names", builtinModuleNames()); err != nil { return nil, err } - if err := setItem(d, "stdlib_module_names", objects.NewTuple(nil)); err != nil { + stdlibNames := make([]objects.Object, len(stdlibModuleNames)) + for i, n := range stdlibModuleNames { + stdlibNames[i] = objects.NewStr(n) + } + stdlibSet, err := objects.NewFrozenset(stdlibNames) + if err != nil { + return nil, err + } + if err := setItem(d, "stdlib_module_names", stdlibSet); err != nil { return nil, err } if err := setItem(d, "hash_info", hashInfo()); err != nil { diff --git a/objects/module.go b/objects/module.go index 896919ff..d3922f4f 100644 --- a/objects/module.go +++ b/objects/module.go @@ -286,6 +286,16 @@ func (m *Module) State() any { return m.state } // CPython: Objects/moduleobject.c:486 PyModule_SetState (gopy analog) func (m *Module) SetState(s any) { m.state = s } +// ModuleAttrErrorHook, when set, builds the AttributeError raised for a +// module attribute miss. The import system (package imp) installs it so +// the message can surface the stdlib-shadowing and circular-import hints +// from _Py_module_getattro_impl, which depend on sys state the objects +// package cannot reach directly. Nil in unit tests that exercise objects +// in isolation; module.go then falls back to the plain message. +// +// CPython: Objects/moduleobject.c:1024 _Py_module_getattro_impl +var ModuleAttrErrorHook func(m *Module, name string) error + // moduleGetattr implements __getattr__ for module objects. It checks // __dict__ first, then falls back to the PEP 562 __getattr__ callable // stored in __dict__ under "__getattr__". @@ -368,9 +378,16 @@ func moduleGetattr(o Object, name Object) (Object, error) { if gaErr == nil { return callOneArg(gaObj, name) } - // Best-effort error message mirroring module_getattro's tail. + // Best-effort error message mirroring module_getattro's tail. The + // import system registers ModuleAttrErrorHook to surface the + // stdlib-shadowing and circular-import hints (_Py_module_getattro_impl), + // which need sys.path / sys.flags / sys.stdlib_module_names access the + // objects package cannot reach without an import cycle. // - // CPython: Objects/moduleobject.c:1042 PyErr_Format module has no attribute + // CPython: Objects/moduleobject.c:1024 _Py_module_getattro_impl (error tail) + if ModuleAttrErrorHook != nil { + return nil, ModuleAttrErrorHook(m, key) + } if modName := moduleStrAttr(m, "__name__"); modName != "" { return nil, fmt.Errorf("AttributeError: module '%s' has no attribute '%s'", modName, key) } diff --git a/vm/eval_helpers.go b/vm/eval_helpers.go index f252d926..86684407 100644 --- a/vm/eval_helpers.go +++ b/vm/eval_helpers.go @@ -280,6 +280,19 @@ func (e *evalState) importName(name, fromlist, level objects.Object) objects.Obj e.pendingErr = ierr return nil } + // A non-empty fromlist drives _handle_fromlist: force-import any + // submodule named in the fromlist that is not already an attribute, + // so a later IMPORT_FROM/import_all_from finds it via plain getattr. + // CPython runs this inside __import__ before returning the module. + // + // CPython: Lib/importlib/_bootstrap.py:1463 _handle_fromlist + if !isEmptyFromlist(fromlist) { + if herr := e.handleFromlist(mod, fromlist, false); herr != nil { + e.pendingErr = herr + return nil + } + } + // When fromlist is empty (`import a.b.c`) return the top-level // package; otherwise return the deepest module so IMPORT_FROM can // extract attributes. diff --git a/vm/eval_import.go b/vm/eval_import.go index bd5ea963..7dcb2274 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -199,7 +199,7 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo pkgname := globalName(e.f.Globals) exec := &vmExecutor{ts: e.ts, builtins: builtinsNS} - mod, ierr := imp.ImportModuleLevel(exec, modname, pkgname, level) + mod, ierr := imp.ImportModuleLevelObject(exec, modname, pkgname, level) if ierr != nil { // Promote Go-level ErrModuleNotFound into a typed // ModuleNotFoundError so `try: ... except ImportError:` @@ -214,6 +214,18 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo return 0, true, ierr } + // A non-empty fromlist drives _handle_fromlist: force-import any + // submodule named in the fromlist that the package does not already + // expose, so the IMPORT_FROM / import_all_from that follows resolves + // it via a plain attribute read. + // + // CPython: Lib/importlib/_bootstrap.py:1409 _handle_fromlist + if !isEmptyFromlist(fromlistObj) { + if herr := e.handleFromlist(mod, fromlistObj, false); herr != nil { + return 0, true, herr + } + } + // CPython semantics: when fromlist is None/empty (plain `import // a.b.c`), push the TOP-LEVEL package so the name `a` is bound. // When fromlist is non-empty (`from a.b import c`), push the @@ -278,18 +290,25 @@ func (e *evalState) importStar(from objects.Object) error { var all []objects.Object skipUnder := false - // Check for __all__. - allAttr, aerr := objects.GetAttr(from, objects.NewStr("__all__")) - if aerr == nil && allAttr != nil { + // Prefer __all__; fall back to __dict__ keys (skipping leading "_"). + // Neither read force-imports anything: _handle_fromlist already + // pulled in the fromlist's submodules during IMPORT_NAME. + allAttr, allFound, aerr := getOptionalAttr(e, from, "__all__") + if aerr != nil { + return aerr + } + if allFound { items, ierr := iterToSlice(allAttr) if ierr != nil { return ierr } all = items } else { - // Fall back to __dict__ keys, skipping names starting with "_". - dictAttr, derr := objects.GetAttr(from, objects.NewStr("__dict__")) - if derr != nil || dictAttr == nil { + dictAttr, dictFound, derr := getOptionalAttr(e, from, "__dict__") + if derr != nil { + return derr + } + if !dictFound { return fmt.Errorf("ImportError: from-import-* object has no __dict__ and no __all__") } items, ierr := iterToSlice(dictAttr) @@ -301,38 +320,21 @@ func (e *evalState) importStar(from objects.Object) error { } for _, nameObj := range all { - name, nerr := objects.Str(nameObj) - if nerr != nil { - return fmt.Errorf("TypeError: 'import *' name must be str") + name, ok := nameObj.(*objects.Unicode) + if !ok { + return importStarNonStrError(from, nameObj, skipUnder) } - if skipUnder && name != "" && name[0] == '_' { + s := name.Value() + if skipUnder && s != "" && s[0] == '_' { continue } - var val objects.Object - if skipUnder { - // __dict__ fallback: the attribute is already bound. - v, verr := objects.GetAttr(from, objects.NewStr(name)) - if verr != nil { - return verr - } - val = v - } else { - // An __all__ entry may name a submodule that no IMPORT_NAME - // has pulled in yet. CPython runs _handle_fromlist over the - // fromlist before import_all_from copies the attributes; - // gopy lacks that pass, so force-import here the same way - // evalImportFrom does for named `from pkg import sub`. - // - // CPython: Lib/importlib/_bootstrap.py:1463 _handle_fromlist - v, verr := evalImportFrom(e, from, name) - if verr != nil { - return verr - } - val = v + val, verr := objects.GetAttr(from, objects.NewStr(s)) + if verr != nil { + return verr } - serr := dst.SetItem(objects.NewStr(name), val) - // CPython: Python/ceval.c import_star_from — always releases the - // GetAttr new-ref after SetItem takes its own. + serr := dst.SetItem(objects.NewStr(s), val) + // CPython: Python/intrinsics.c import_all_from releases the GetAttr + // new-ref after SetItem takes its own. objects.Decref(val) if serr != nil { return serr @@ -341,6 +343,28 @@ func (e *evalState) importStar(from objects.Object) error { return nil } +// importStarNonStrError builds the TypeError import_all_from raises for a +// non-string entry in __all__ (or non-string key in __dict__). When the +// module's own __name__ is not a string, the error is about __name__ +// itself. +// +// CPython: Python/intrinsics.c:77 import_all_from (non-str name branch) +func importStarNonStrError(from, name objects.Object, skipUnder bool) error { + modNameObj, err := objects.GetAttr(from, objects.NewStr("__name__")) + if err != nil { + return err + } + mn, ok := modNameObj.(*objects.Unicode) + if !ok { + return fmt.Errorf("TypeError: module __name__ must be a string, not %s", modNameObj.Type().Name) + } + key, container := "Item", "__all__" + if skipUnder { + key, container = "Key", "__dict__" + } + return fmt.Errorf("TypeError: %s in %s.%s must be str, not %s", key, mn.Value(), container, name.Type().Name) +} + // isEmptyFromlist reports whether fromlist is None, the empty tuple, or // the empty list. This mirrors CPython's check in import_name: // "if fromlist is NULL or fromlist is empty tuple, head is returned". @@ -455,11 +479,18 @@ func isAttributeErrorMsg(err error) bool { return strings.HasPrefix(msg, "AttributeError:") } -// evalImportFrom ports _PyEval_ImportFrom. It tries to fetch `name` as -// an attribute of `v`; on miss it consults sys.modules under -// "." using the parent's __name__. As a gopy-specific -// extension (we lack importlib's _handle_fromlist plumbing), it -// force-imports the submodule when sys.modules has not cached it yet. +// errImportFromRaised is a sentinel returned by evalImportFrom after it +// has already installed a typed ImportError on the thread state. The VM +// unwind reads the thread-state exception, so the Go error only needs to +// be non-nil to signal failure. +var errImportFromRaised = errors.New("vm: import-from error raised") + +// evalImportFrom ports _PyEval_ImportFrom. It fetches `name` as an +// attribute of `v`; on miss it falls back to reading "." +// straight out of sys.modules (the circular-import path), and when that +// also misses it raises the "cannot import name X from Y (location)" +// ImportError, reproducing the stdlib-shadowing and circular-import +// message variants. // // CPython: Python/ceval.c:3154 _PyEval_ImportFrom func evalImportFrom(e *evalState, v objects.Object, name string) (objects.Object, error) { @@ -469,33 +500,206 @@ func evalImportFrom(e *evalState, v objects.Object, name string) (objects.Object return x, nil } - // Issue #17636 fallback: read parent.__name__ and look up - // "." in sys.modules. + // Issue #17636: in case this failed because of a circular relative + // import, fall back on reading the module directly from sys.modules. modNameObj, found, err := getOptionalAttr(e, v, "__name__") if err != nil { return nil, err } - if !found { - return nil, fmt.Errorf("vm: ImportError: cannot import name %q from ", name) + // CPython requires PyUnicode_Check (str or subclass); a non-str + // __name__ is treated as missing. + var modNameStr objects.Object + if found && objects.IsSubtype(modNameObj.Type(), objects.StrType()) { + modNameStr = modNameObj + } + if modNameStr != nil { + if s, ok := modNameStr.(*objects.Unicode); ok { + full := s.Value() + "." + name + if cached, ok := imp.GetModule(full); ok { + return cached, nil + } + } + } + + return nil, e.importFromError(v, name, modNameStr) +} + +// importFromError builds and raises the ImportError for a failed +// `from v import name`, porting the error block of _PyEval_ImportFrom. +// +// CPython: Python/ceval.c:3185 _PyEval_ImportFrom (error label) +func (e *evalState) importFromError(v objects.Object, name string, modNameObj objects.Object) error { + nameRepr, _ := objects.Repr(objects.NewStr(name)) + // mod_name_or_unknown is the real __name__ object when present, else a + // fresh "" str. It is the object handed to + // PySet_Contains so an unhashable __name__ raises through. + haveModName := modNameObj != nil + modNameOrUnknownObj := modNameObj + if !haveModName { + modNameOrUnknownObj = objects.NewStr("") + } + modRepr, _ := objects.Repr(modNameOrUnknownObj) + + // modName is the value forwarded as the ImportError `name` member: the + // real module name when __name__ was a string, else unset. + modName := "" + if haveModName { + if s, ok := modNameObj.(*objects.Unicode); ok { + modName = s.Value() + } } - parentName, serr := objects.Str(modNameObj) + + spec, specFound, serr := getOptionalAttr(e, v, "__spec__") if serr != nil { - return nil, fmt.Errorf("vm: ImportError: cannot import name %q from ", name) + return serr + } + if !specFound { + msg := fmt.Sprintf("cannot import name %s from %s (unknown location)", nameRepr, modRepr) + pyerrors.SetImportErrorWithNameFrom(e.ts, msg, modName, "", name) + return errImportFromRaised } - full := parentName + "." + name - if cached, ok := imp.GetModule(full); ok { - return cached, nil + origin, originFound, oerr := imp.SpecFileOrigin(spec) + if oerr != nil { + return oerr } - // gopy extension: no _handle_fromlist runs during IMPORT_NAME, so - // the submodule may never have entered sys.modules. Force-import - // it here. CPython's _handle_fromlist (Lib/importlib/_bootstrap.py) - // performs the same _call_with_frames_removed(import_, ...) per - // fromlist entry. - exec := &vmExecutor{ts: e.ts, builtins: callerBuiltins(e.f)} - sub, ierr := imp.ImportModuleLevel(exec, full, "", 0) - if ierr != nil { - return nil, fmt.Errorf("vm: ImportError: cannot import name %q from %q: %w", name, parentName, ierr) + + shadowing, sherr := imp.ModuleIsPossiblyShadowing(originFound, origin) + if sherr != nil { + return sherr + } + shadowingStdlib := false + if shadowing { + if c, cerr := imp.StdlibModuleNamesContains(modNameOrUnknownObj); cerr != nil { + return cerr + } else { + shadowingStdlib = c + } } - return sub, nil + + // Fall back to __file__ for diagnostics when the spec carries no + // location origin and v is a module. + if !originFound { + if mod, ok := v.(*objects.Module); ok { + if f, ferr := mod.Dict().GetItem(objects.NewStr("__file__")); ferr == nil && f != nil { + if fs, ok := f.(*objects.Unicode); ok { + origin = fs.Value() + originFound = true + } + } + } + } + + var msg string + switch { + case shadowingStdlib: + originRepr, _ := objects.Repr(objects.NewStr(origin)) + msg = fmt.Sprintf("cannot import name %s from %s (consider renaming %s since it has the same name as the standard library module named %s and prevents importing that standard library module)", + nameRepr, modRepr, originRepr, modRepr) + default: + initializing, ierr := imp.SpecIsInitializing(spec) + if ierr != nil { + return ierr + } + switch { + case initializing && shadowing: + originRepr, _ := objects.Repr(objects.NewStr(origin)) + msg = fmt.Sprintf("cannot import name %s from %s (consider renaming %s if it has the same name as a library you intended to import)", + nameRepr, modRepr, originRepr) + case initializing && originFound: + msg = fmt.Sprintf("cannot import name %s from partially initialized module %s (most likely due to a circular import) (%s)", + nameRepr, modRepr, origin) + case initializing: + msg = fmt.Sprintf("cannot import name %s from partially initialized module %s (most likely due to a circular import)", + nameRepr, modRepr) + case originFound: + msg = fmt.Sprintf("cannot import name %s from %s (%s)", nameRepr, modRepr, origin) + default: + msg = fmt.Sprintf("cannot import name %s from %s (unknown location)", nameRepr, modRepr) + } + } + + originArg := "" + if originFound { + originArg = origin + } + pyerrors.SetImportErrorWithNameFrom(e.ts, msg, modName, originArg, name) + return errImportFromRaised +} + +// handleFromlist ports _handle_fromlist: for a package module (one that +// carries __path__), force-import each fromlist entry that is not already +// an attribute so a later attribute read resolves the submodule. A `*` +// entry recurses over module.__all__; a non-str entry raises TypeError. +// +// CPython: Lib/importlib/_bootstrap.py:1409 _handle_fromlist +func (e *evalState) handleFromlist(mod objects.Object, fromlist objects.Object, recursive bool) error { + // _handle_fromlist runs only for packages (hasattr(module, '__path__')). + // __import__ guards the call with the same check, and a non-module + // cached entry never carries __path__, so it no-ops here. + // + // CPython: Lib/importlib/_bootstrap.py:1503 elif hasattr(module, '__path__') + if !recursive { + if _, present, herr := getOptionalAttr(e, mod, "__path__"); herr != nil { + return herr + } else if !present { + return nil + } + } + + items, err := iterToSlice(fromlist) + if err != nil { + return err + } + modName := "" + if nm, present, _ := getOptionalAttr(e, mod, "__name__"); present { + if s, ok := nm.(*objects.Unicode); ok { + modName = s.Value() + } + } + + for _, item := range items { + x, ok := item.(*objects.Unicode) + if !ok { + where := "``from list''" + if recursive { + where = modName + ".__all__" + } + return fmt.Errorf("TypeError: Item in %s must be str, not %s", where, item.Type().Name) + } + entry := x.Value() + switch { + case entry == "*": + if !recursive { + if allObj, present, _ := getOptionalAttr(e, mod, "__all__"); present && allObj != nil { + if rerr := e.handleFromlist(mod, allObj, true); rerr != nil { + return rerr + } + } + } + default: + if _, present, gerr := getOptionalAttr(e, mod, entry); gerr != nil { + return gerr + } else if present { + continue + } + fromName := modName + "." + entry + exec := &vmExecutor{ts: e.ts, builtins: callerBuiltins(e.f)} + if _, ierr := imp.ImportModuleLevel(exec, fromName, "", 0); ierr != nil { + // Backwards-compatibility: ignore a fromlist-triggered import + // of a submodule that simply does not exist, but only when the + // miss is for exactly this submodule. + // + // CPython: Lib/importlib/_bootstrap.py:1433 except ModuleNotFoundError + if errors.Is(ierr, imp.ErrModuleNotFound) { + if _, cached := imp.GetModule(fromName); !cached { + pyerrors.Clear(e.ts) + continue + } + } + return ierr + } + } + } + return nil } From 0f9d10b486f9ebefca318be2dbbf010d8b40965a Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 03:55:29 +0700 Subject: [PATCH 26/84] vm: resolve instrumented opcode before counting jump cache stride A backward jump computed off an instrumented bytecode position read the live byte (INSTRUMENTED_LINE or an INSTRUMENTED_ variant) and looked its cache width up in the per-opcode table, which is keyed by base opcode only. The marker returned a zero cache count, so the jump landed one codeunit short of its target. Under sys.settrace this dropped the loop header by one instruction in inlined comprehensions, leaving the freshly built list on top of the stack instead of the iterator and raising 'list object is not an iterator' on the next FOR_ITER. advance() now resolves the marker (via the line original-opcode table) and de-instruments before reading the cache stride. --- vm/eval.go | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/vm/eval.go b/vm/eval.go index 7d58729d..06a2399d 100644 --- a/vm/eval.go +++ b/vm/eval.go @@ -17,6 +17,7 @@ import ( "github.com/tamnd/gopy/compile" "github.com/tamnd/gopy/frame" "github.com/tamnd/gopy/gil" + "github.com/tamnd/gopy/monitor" "github.com/tamnd/gopy/objects" "github.com/tamnd/gopy/stackref" "github.com/tamnd/gopy/state" @@ -474,6 +475,24 @@ func (e *evalState) advance() int { return ip + 2 } op := compile.Opcode(code[ip]) + // Under monitoring the live byte at ip may be INSTRUMENTED_LINE (a + // marker left in place while dispatch runs the hidden opcode) or an + // INSTRUMENTED_ variant. Both preserve the base opcode's inline + // cache layout, but the cache table is keyed by base opcode, so a + // jump computed off the raw instrumented byte would count zero cache + // codeunits and land one codeunit short of its target. Resolve to the + // base opcode first. + // + // CPython: the JUMPBY stride is the base arm's compile-time + // INLINE_CACHE_ENTRIES_, independent of the instrumented byte. + if op == compile.INSTRUMENTED_LINE { + if data := monitor.CoMonitoring(e.f.Code); data != nil { + if base := monitor.GetOriginalOpcode(data, ip/2); base != 0 { + op = base + } + } + } + op = monitor.DeInstrument(op) return ip + 2 + 2*compile.CacheCount(op) } From 15ebc3ca0d49e0a9a07ac91376078e10bb32ee36 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 03:57:22 +0700 Subject: [PATCH 27/84] main: bind __main__.__builtins__ to the builtins module CPython binds the builtins module object (not its dict) to __builtins__ in the __main__ namespace; every other module gets the dict. The frame builder already unwraps a module back to its dict for LOAD_GLOBAL, so the only behavioural change is that 'del __builtins__.__import__' now reaches a module attribute and the import machinery raises ImportError afterwards, matching test_import.test_delete_builtins_import. --- cmd/gopy/main.go | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 12067623..2058c7a4 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -756,7 +756,19 @@ func bootstrapBuiltins(stdout, stderr *os.File) (*objects.Dict, error) { func newMainGlobals(builtinsDict *objects.Dict, name string) *objects.Dict { mainDict := objects.NewDict() _ = mainDict.SetItem(objects.NewStr("__name__"), objects.NewStr(name)) - _ = mainDict.SetItem(objects.NewStr("__builtins__"), builtinsDict) + // CPython binds __main__.__builtins__ to the builtins *module* object; + // every other module receives the builtins dict instead. The frame + // builder unwraps the module back to its dict for LOAD_GLOBAL, so the + // only observable difference is that `del __builtins__.__import__` + // reaches a module attribute, after which the import machinery raises + // ImportError (test_import.test_delete_builtins_import). + // + // CPython: Python/pylifecycle.c init_interp_main (binds __main__.__builtins__) + var builtinsBinding objects.Object = builtinsDict + if bm, ok := imp.GetModule("builtins"); ok { + builtinsBinding = bm + } + _ = mainDict.SetItem(objects.NewStr("__builtins__"), builtinsBinding) // CPython always binds __main__.__spec__: None for `-c`/script runs, // a real ModuleSpec under `-m`. runFile overwrites this with a // file-location spec for vendored "test." runs. From e826338e26242a39b71d33b9e3d4c2003be877f1 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:13:18 +0700 Subject: [PATCH 28/84] io,os: drop redundant Go finalizer on borrowed file descriptors The integer-fd and path-open FileIO constructors wrap an os.File whose descriptor gopy already owns through FileIO.Close and the closefd flag. Go's runtime also arms its own finalizer on those os.File values, and a GC mid-run could fire it after the descriptor number had been freed and reused by an unrelated open file, closing that file's fd out from under it. Long write loops then failed with a spurious EBADF. Clear the Go finalizer at every borrowed-fd wrap site, and also on os.isatty's throwaway wrapper, so release stays deterministic. --- .gitignore | 3 + longlist.py | 14336 ------------------------------------- module/io/fileio.go | 22 + module/io/module.go | 1 + module/os/posix_extra.go | 9 + 5 files changed, 35 insertions(+), 14336 deletions(-) delete mode 100644 longlist.py diff --git a/.gitignore b/.gitignore index dd8e3a50..f921e89c 100644 --- a/.gitignore +++ b/.gitignore @@ -38,3 +38,6 @@ junk*/ ziptestmodule ziptestmodule.py + +# test_module_with_large_stack writes this into the cwd +longlist.py diff --git a/longlist.py b/longlist.py deleted file mode 100644 index 767c45cc..00000000 --- a/longlist.py +++ /dev/null @@ -1,14336 +0,0 @@ -d = [ -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", -"", 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Leaving Go's finalizer in +// place lets a later GC close a descriptor whose integer was already freed +// and reused by another open file, surfacing as a spurious EBADF +// ("bad file descriptor") on the unrelated file's next write. +// +// CPython: Modules/_io/fileio.c:159 _io_FileIO_close_impl owns the close; +// there is no background reclaim of the fd. +func clearGoFinalizer(f *stdos.File) { + if f != nil { + runtime.SetFinalizer(f, nil) + } +} + // SMALLCHUNK / DEFAULT_BUFFER_SIZE / LARGE_BUFFER_CUTOFF_SIZE mirror the // growth-policy constants used by readall() in CPython. // @@ -245,6 +262,7 @@ func fileIOCall(_ objects.Object, args []objects.Object, kwargs map[string]objec if f == nil { return nil, fmt.Errorf("OSError: bad file descriptor") } + clearGoFinalizer(f) fi := &FileIO{ f: f, nameIsInt: true, @@ -295,8 +313,12 @@ func fileIOCall(_ objects.Object, args []objects.Object, kwargs map[string]objec if f == nil { return nil, fmt.Errorf("OSError: bad file descriptor from opener") } + clearGoFinalizer(f) } else { f, err = stdos.OpenFile(name, flag, 0o666) + if err == nil { + clearGoFinalizer(f) + } if err != nil { // Preserve the os.PathError chain (errno + filename) with %w // so the unwind path can build a FileNotFoundError / diff --git a/module/io/module.go b/module/io/module.go index 37e9d794..1d3dcf55 100644 --- a/module/io/module.go +++ b/module/io/module.go @@ -439,6 +439,7 @@ func ioOpen(a *ioOpenArgs) (objects.Object, error) { if f == nil { return nil, fmt.Errorf("OSError: bad file descriptor from opener") } + clearGoFinalizer(f) raw = NewFileIO(f, a.file, rawMode, readable, writable) } else { f, err := os.OpenFile(a.file, flag, 0o600) diff --git a/module/os/posix_extra.go b/module/os/posix_extra.go index 0f0d03e5..2f5e2962 100644 --- a/module/os/posix_extra.go +++ b/module/os/posix_extra.go @@ -197,10 +197,19 @@ func osIsatty(args []objects.Object, _ map[string]objects.Object) (objects.Objec return nil, fmt.Errorf("TypeError: an integer is required") } fdVal, _ := fdObj.Int64() + // The fd is owned by the caller (a live file, socket, or one of the + // std streams); this wrapper only borrows it to Stat. Clear Go's + // runtime finalizer so a later GC of the throwaway *os.File never + // closes a descriptor we do not own. Without this, a GC mid-run + // closes a borrowed fd and unrelated writes fail with EBADF. + // + // CPython: Modules/posixmodule.c:11947 os_isatty_impl borrows the fd + // and never closes it. f := goos.NewFile(uintptr(fdVal), "") if f == nil { return objects.NewBool(false), nil } + runtime.SetFinalizer(f, nil) info, err := f.Stat() if err != nil { // CPython os.isatty returns False on any error rather than From 01e9f408d585b78956e5f0a087d23157f6113991 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:13:24 +0700 Subject: [PATCH 29/84] imp: enforce case-sensitive module matching on case-insensitive filesystems On macOS the filesystem is case-insensitive but case-preserving, so a plain os.Stat probe lets `import RAnDoM` resolve random.py. CPython's FileFinder guards against this by testing the candidate name against the exact-case set(os.listdir(dir)) unless _relax_case() allows folding. Port that check: confirm each resolved candidate's final component matches a real directory entry with exact case, relaxed only on case-insensitive platforms when PYTHONCASEOK is set. --- imp/pathfinder.go | 54 ++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 49 insertions(+), 5 deletions(-) diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 8f87ecb4..9471c811 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -22,6 +22,7 @@ import ( "fmt" "os" "path/filepath" + "runtime" "strings" "sync" @@ -169,7 +170,7 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // CPython: Lib/importlib/_bootstrap_external.py:1378 cache_module in cache pkgDir := filepath.Join(dir, tail) pkgInit := filepath.Join(pkgDir, "__init__.py") - if isFile(pkgInit) { + if isFile(pkgInit) && caseOK(pkgDir) { mod, err := loadAsPackage(exec, p.Compiler, pkgInit, pkgDir, name) if err != nil { return nil, err @@ -182,7 +183,7 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // bytecode loader is tried after the source loader. // CPython: Lib/importlib/_bootstrap_external.py:1424 __init__ suffix loop pkgInitPyc := filepath.Join(pkgDir, "__init__.pyc") - if isFile(pkgInitPyc) { + if isFile(pkgInitPyc) && caseOK(pkgDir) { mod, err := loadAsPackageBytecode(exec, pkgInitPyc, pkgDir, name) if err != nil { return nil, err @@ -193,7 +194,7 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // Module case: /.py. // CPython: Lib/importlib/_bootstrap_external.py:1391 suffix loop modFile := filepath.Join(dir, tail+".py") - if isFile(modFile) { + if isFile(modFile) && caseOK(modFile) { mod, err := loadAsModule(exec, p.Compiler, modFile, name, parent) if err != nil { return nil, err @@ -205,7 +206,7 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // loader once the source suffix has missed. // CPython: Lib/importlib/_bootstrap_external.py:1215 SourcelessFileLoader modPyc := filepath.Join(dir, tail+".pyc") - if isFile(modPyc) { + if isFile(modPyc) && caseOK(modPyc) { mod, err := loadAsModuleBytecode(exec, modPyc, name, parent) if err != nil { return nil, err @@ -213,7 +214,7 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er bindOnParent(parent, tail, mod) return mod, nil } - if isDir(pkgDir) { + if isDir(pkgDir) && caseOK(pkgDir) { namespacePortions = append(namespacePortions, pkgDir) } } @@ -979,6 +980,49 @@ func isDir(path string) bool { return info.IsDir() } +// caseOK reports whether the final component of an existing candidate path +// matches a real on-disk directory entry with exact case. On a +// case-insensitive but case-preserving filesystem (macOS, Windows) os.Stat +// succeeds for any case spelling, so a plain existence probe would let +// `import RAnDoM` resolve random.py. CPython's FileFinder guards against +// this by testing membership in set(os.listdir(dir)), the exact-case path +// cache, unless _relax_case() is true. caseOK reproduces that membership +// test by scanning the directory for an exact-case name match. +// +// CPython: Lib/importlib/_bootstrap_external.py:1378 cache_module in cache +func caseOK(path string) bool { + if relaxCase() { + return true + } + entries, err := os.ReadDir(filepath.Dir(path)) + if err != nil { + return false + } + base := filepath.Base(path) + for _, e := range entries { + if e.Name() == base { + return true + } + } + return false +} + +// relaxCase mirrors importlib's _relax_case: case folding is relaxed only +// on case-insensitive platforms (Windows, macOS) and only when PYTHONCASEOK +// is present in the environment. Case-sensitive platforms are always +// strict, where caseOK's directory scan is a redundant but harmless match. +// +// CPython: Lib/importlib/_bootstrap_external.py:50 _relax_case +func relaxCase() bool { + switch runtime.GOOS { + case "windows", "darwin": + _, ok := os.LookupEnv("PYTHONCASEOK") + return ok + default: + return false + } +} + var ( pathFinderMu sync.RWMutex pathFinder *PathFinder From 4f32aab7f7baad2bc3c8fe6d579d1ba33b721e1f Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:13:36 +0700 Subject: [PATCH 30/84] os,_imp: posix bytes environ, dynamic-module unmarshal, DirEntry.is_junction Surface gaps the imports panel exercised: posix.environ now carries bytes keys and values the way convertenviron does on POSIX (Lib/os.py decodes them through fsdecode), _imp.get_frozen_object unmarshals an explicit data buffer instead of only consulting the frozen table, _imp.create_dynamic routes to the real handler, and os.DirEntry grows is_junction (always False off Windows). --- module/_imp/module.go | 100 ++++++++++++++++++++++++++++++++++++++++-- module/os/module.go | 72 +++++++++++++++++++++++++++++- module/os/scandir.go | 13 ++++++ 3 files changed, 180 insertions(+), 5 deletions(-) diff --git a/module/_imp/module.go b/module/_imp/module.go index 98be2ff1..9708bebb 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -21,6 +21,7 @@ package _imp import ( + "bytes" "encoding/binary" "fmt" @@ -146,9 +147,7 @@ func buildModule() (*objects.Module, error) { // CPython: Python/import.c:4380 _imp_create_dynamic_impl // CPython: Python/import.c:4440 _imp_exec_dynamic_impl if err := d.SetItem(objects.NewStr("create_dynamic"), - objects.NewBuiltinFunction("create_dynamic", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { - return nil, fmt.Errorf("ImportError: gopy does not support dynamic (C extension) module loading") - })); err != nil { + objects.NewBuiltinFunction("create_dynamic", createDynamic)); err != nil { return nil, err } if err := d.SetItem(objects.NewStr("exec_dynamic"), @@ -274,6 +273,18 @@ func getFrozenObject(args []objects.Object, _ map[string]objects.Object) (object if err != nil { return nil, err } + + // When an explicit data buffer is supplied, CPython unmarshals it + // directly rather than consulting the frozen table; a buffer that does + // not decode to a code object raises ImportError "... is invalid". + if len(args) >= 2 && !objects.IsNone(args[1]) { + data, err := toBuffer(args[1]) + if err != nil { + return nil, fmt.Errorf("TypeError: get_frozen_object() argument 2 must be bytes, not '%T'", args[1]) + } + return unmarshalFrozenData(args[0], data) + } + fm, ok := imp.FindFrozen(name) if !ok || fm.Code == nil { return nil, fmt.Errorf("ImportError: No such frozen object named %s", name) @@ -281,6 +292,89 @@ func getFrozenObject(args []objects.Object, _ map[string]objects.Object) (object return fm.Code, nil } +// unmarshalFrozenData ports unmarshal_frozen_code for the explicit-data +// path of get_frozen_object: an empty or non-code or undecodable buffer +// raises ImportError "Frozen object named %R is invalid" (a non-code +// object that decodes cleanly raises TypeError instead). +// +// CPython: Python/import.c unmarshal_frozen_code / set_frozen_error +func unmarshalFrozenData(nameObj objects.Object, data []byte) (objects.Object, error) { + nameRepr, rerr := objects.Repr(nameObj) + if rerr != nil { + return nil, rerr + } + if len(data) == 0 { + return nil, fmt.Errorf("ImportError: Frozen object named %s is invalid", nameRepr) + } + obj, err := marshal.Load(bytes.NewReader(data)) + if err != nil { + return nil, fmt.Errorf("ImportError: Frozen object named %s is invalid", nameRepr) + } + code, ok := obj.(*objects.Code) + if !ok { + return nil, fmt.Errorf("TypeError: frozen object %s is not a code object", nameRepr) + } + return code, nil +} + +// createDynamic implements _imp.create_dynamic(spec, file=None). gopy +// cannot load CPython C extension shared objects, so the load itself +// fails with ImportError. The spec.name / spec.origin validation that +// _Py_ext_module_loader_info_init_from_spec performs still runs first, +// so a name or origin with an embedded null raises ValueError exactly as +// CPython does before the unsupported-load failure. +// +// CPython: Python/import.c:4743 _imp_create_dynamic_impl +// CPython: Python/importdl.c:115 _Py_ext_module_loader_info_init +func createDynamic(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 1 { + return nil, fmt.Errorf("TypeError: create_dynamic() missing required argument 'spec'") + } + spec := args[0] + + nameObj, err := objects.GetAttr(spec, objects.NewStr("name")) + if err != nil { + return nil, err + } + nameStr, ok := nameObj.(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: module name must be a string") + } + if err := checkEmbeddedNull(nameStr.Value()); err != nil { + return nil, err + } + + originObj, err := objects.GetAttr(spec, objects.NewStr("origin")) + if err != nil { + return nil, err + } + if !objects.IsNone(originObj) { + originStr, ok := originObj.(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: module filename must be a string") + } + if err := checkEmbeddedNull(originStr.Value()); err != nil { + return nil, err + } + } + + return nil, fmt.Errorf("ImportError: gopy does not support dynamic (C extension) module loading") +} + +// checkEmbeddedNull mirrors the ValueError CPython raises when encoding a +// str that contains a NUL, the failure path the name / filename encode +// steps in _Py_ext_module_loader_info_init hit for an embedded null. +// +// CPython: Objects/unicodeobject.c PyUnicode_AsUTF8AndSize (embedded null) +func checkEmbeddedNull(s string) error { + for i := 0; i < len(s); i++ { + if s[i] == 0 { + return fmt.Errorf("ValueError: embedded null character") + } + } + return nil +} + // createBuiltin implements _imp.create_builtin(spec). It reads spec.name // and runs the matching inittab initializer, which builds a fully // initialized module (gopy has no separate exec phase for builtins). diff --git a/module/os/module.go b/module/os/module.go index 482bd04a..2d4b9de5 100644 --- a/module/os/module.go +++ b/module/os/module.go @@ -206,7 +206,6 @@ func osTimes(_ []objects.Object, _ map[string]objects.Object) (objects.Object, e } func init() { - _ = imp.AppendInittab("os", buildOS) _ = imp.AppendInittab("posix", buildPosixModule) // On Windows, Lib/os.py does `from nt import *`; register the same // syscall surface under the "nt" name so `import nt` resolves. @@ -280,13 +279,25 @@ func buildPath() (*objects.Module, error) { func buildOS() (*objects.Module, error) { // environ: populate from the real process environment. // CPython: Modules/posixmodule.c:1768 convertenviron + // posix.environ holds bytes keys/values on POSIX (Lib/os.py decodes + // them through fsdecode); the nt build keeps str. CPython: + // Modules/posixmodule.c convertenviron. + environBytes := runtime.GOOS != "windows" environDict := objects.NewDict() for _, kv := range goos.Environ() { k, v, ok := strings.Cut(kv, "=") if !ok { continue } - if err := environDict.SetItem(objects.NewStr(k), objects.NewStr(v)); err != nil { + var kObj, vObj objects.Object + if environBytes { + kObj = objects.NewBytes([]byte(k)) + vObj = objects.NewBytes([]byte(v)) + } else { + kObj = objects.NewStr(k) + vObj = objects.NewStr(v) + } + if err := environDict.SetItem(kObj, vObj); err != nil { return nil, err } } @@ -329,6 +340,8 @@ func buildOS() (*objects.Module, error) { {"listdir", objects.NewBuiltinFunction("listdir", listdir)}, {"stat", objects.NewBuiltinFunction("stat", stat)}, {"getenv", objects.NewBuiltinFunction("getenv", getenv)}, + {"putenv", objects.NewBuiltinFunction("putenv", putenv)}, + {"unsetenv", objects.NewBuiltinFunction("unsetenv", unsetenv)}, {"getpid", objects.NewBuiltinFunction("getpid", getpid)}, {"getuid", objects.NewBuiltinFunction("getuid", getuid)}, {"makedirs", objects.NewBuiltinFunction("makedirs", makedirs)}, @@ -883,6 +896,61 @@ func stat(args []objects.Object, _ map[string]objects.Object) (objects.Object, e // getenv mirrors Lib/os.py:818 getenv: returns environ[key] or default. // CPython: Lib/os.py:818 getenv +// fsArg decodes a putenv/unsetenv argument that may arrive as str or +// bytes (Lib/os.py's posix _Environ fsencodes keys and values to bytes +// before calling putenv / unsetenv). +func fsArg(o objects.Object) (string, error) { + switch v := o.(type) { + case *objects.Bytes: + return string(v.Bytes()), nil + case *objects.ByteArray: + return string(v.Bytes()), nil + default: + return objects.Str(o) + } +} + +// putenv implements posix.putenv(key, value): set a process environment +// variable. Lib/os.py's _Environ.__setitem__ calls it before updating +// its backing dict. +// +// CPython: Modules/posixmodule.c os_putenv_impl +func putenv(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 2 { + return nil, fmt.Errorf("TypeError: putenv() takes exactly 2 arguments (%d given)", len(args)) + } + key, err := fsArg(args[0]) + if err != nil { + return nil, err + } + value, err := fsArg(args[1]) + if err != nil { + return nil, err + } + if err := goos.Setenv(key, value); err != nil { + return nil, fmt.Errorf("OSError: %s", err.Error()) + } + return objects.None(), nil +} + +// unsetenv implements posix.unsetenv(key): remove a process environment +// variable. Lib/os.py's _Environ.__delitem__ calls it. +// +// CPython: Modules/posixmodule.c os_unsetenv_impl +func unsetenv(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 1 { + return nil, fmt.Errorf("TypeError: unsetenv() takes exactly 1 argument (%d given)", len(args)) + } + key, err := fsArg(args[0]) + if err != nil { + return nil, err + } + if err := goos.Unsetenv(key); err != nil { + return nil, fmt.Errorf("OSError: %s", err.Error()) + } + return objects.None(), nil +} + func getenv(args []objects.Object, kwargs map[string]objects.Object) (objects.Object, error) { if len(args) == 0 { return nil, fmt.Errorf("TypeError: getenv() missing required argument: 'key'") diff --git a/module/os/scandir.go b/module/os/scandir.go index ca4823a9..eb5a8688 100644 --- a/module/os/scandir.go +++ b/module/os/scandir.go @@ -187,6 +187,8 @@ func direntryGetattr(o objects.Object, name objects.Object) (objects.Object, err return objects.NewBuiltinFunction("is_file", direntryIsFile(de)), nil case "is_symlink": return objects.NewBuiltinFunction("is_symlink", direntryIsSymlink(de)), nil + case "is_junction": + return objects.NewBuiltinFunction("is_junction", direntryIsJunction(de)), nil case "stat": return objects.NewBuiltinFunction("stat", direntryStat(de)), nil case "inode": @@ -252,6 +254,17 @@ func direntryIsSymlink(de *DirEntry) func(args []objects.Object, kwargs map[stri } } +// direntryIsJunction builds the bound is_junction() method. Junctions +// are a Windows-only concept; on every platform gopy targets here the +// answer is always False. +// +// CPython: Modules/posixmodule.c DirEntry_is_junction +func direntryIsJunction(_ *DirEntry) func(args []objects.Object, kwargs map[string]objects.Object) (objects.Object, error) { + return func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + return objects.False(), nil + } +} + // direntryStat builds the bound stat(*, follow_symlinks=True) method. // // CPython: Modules/posixmodule.c:13278 DirEntry_stat From 565b893e57a9d822319c0a52315c0c2fb59fba52 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:15:42 +0700 Subject: [PATCH 31/84] test: vendor test.test_import.data fixtures for import gate --- stdlib/test/test_import/__init__.py | 3407 +++++++++++++++++ stdlib/test/test_import/__main__.py | 3 + .../data/circular_imports/basic.py | 2 + .../data/circular_imports/basic2.py | 1 + .../data/circular_imports/binding.py | 1 + .../data/circular_imports/binding2.py | 1 + .../data/circular_imports/from_cycle1.py | 2 + .../data/circular_imports/from_cycle2.py | 2 + .../data/circular_imports/import_cycle.py | 3 + .../data/circular_imports/indirect.py | 1 + .../data/circular_imports/rebinding.py | 3 + .../data/circular_imports/rebinding2.py | 3 + .../data/circular_imports/singlephase.py | 13 + .../data/circular_imports/source.py | 2 + .../data/circular_imports/subpackage.py | 2 + .../circular_imports/subpkg/subpackage2.py | 2 + .../data/circular_imports/subpkg/util.py | 2 + .../data/circular_imports/subpkg2/__init__.py | 0 .../subpkg2/parent/__init__.py | 1 + .../circular_imports/subpkg2/parent/child.py | 3 + .../test_import/data/circular_imports/use.py | 2 + .../test_import/data/circular_imports/util.py | 2 + stdlib/test/test_import/data/double_const.py | 30 + .../test/test_import/data/package/__init__.py | 2 + .../test_import/data/package/submodule.py | 0 .../test_import/data/package2/submodule1.py | 3 + .../test_import/data/package2/submodule2.py | 0 .../test_import/data/package3/__init__.py | 2 + .../test_import/data/package3/submodule.py | 7 + .../test_import/data/package4/__init__.py | 5 + .../test_import/data/package4/submodule.py | 3 + .../test_import/data/unwritable/__init__.py | 12 + stdlib/test/test_import/data/unwritable/x.py | 0 33 files changed, 3522 insertions(+) create mode 100644 stdlib/test/test_import/__init__.py create mode 100644 stdlib/test/test_import/__main__.py create mode 100644 stdlib/test/test_import/data/circular_imports/basic.py create mode 100644 stdlib/test/test_import/data/circular_imports/basic2.py create mode 100644 stdlib/test/test_import/data/circular_imports/binding.py create mode 100644 stdlib/test/test_import/data/circular_imports/binding2.py create mode 100644 stdlib/test/test_import/data/circular_imports/from_cycle1.py create mode 100644 stdlib/test/test_import/data/circular_imports/from_cycle2.py create mode 100644 stdlib/test/test_import/data/circular_imports/import_cycle.py create mode 100644 stdlib/test/test_import/data/circular_imports/indirect.py create mode 100644 stdlib/test/test_import/data/circular_imports/rebinding.py create mode 100644 stdlib/test/test_import/data/circular_imports/rebinding2.py create mode 100644 stdlib/test/test_import/data/circular_imports/singlephase.py create mode 100644 stdlib/test/test_import/data/circular_imports/source.py create mode 100644 stdlib/test/test_import/data/circular_imports/subpackage.py create mode 100644 stdlib/test/test_import/data/circular_imports/subpkg/subpackage2.py create mode 100644 stdlib/test/test_import/data/circular_imports/subpkg/util.py create mode 100644 stdlib/test/test_import/data/circular_imports/subpkg2/__init__.py create mode 100644 stdlib/test/test_import/data/circular_imports/subpkg2/parent/__init__.py create mode 100644 stdlib/test/test_import/data/circular_imports/subpkg2/parent/child.py create mode 100644 stdlib/test/test_import/data/circular_imports/use.py create mode 100644 stdlib/test/test_import/data/circular_imports/util.py create mode 100644 stdlib/test/test_import/data/double_const.py create mode 100644 stdlib/test/test_import/data/package/__init__.py create mode 100644 stdlib/test/test_import/data/package/submodule.py create mode 100644 stdlib/test/test_import/data/package2/submodule1.py create mode 100644 stdlib/test/test_import/data/package2/submodule2.py create mode 100644 stdlib/test/test_import/data/package3/__init__.py create mode 100644 stdlib/test/test_import/data/package3/submodule.py create mode 100644 stdlib/test/test_import/data/package4/__init__.py create mode 100644 stdlib/test/test_import/data/package4/submodule.py create mode 100644 stdlib/test/test_import/data/unwritable/__init__.py create mode 100644 stdlib/test/test_import/data/unwritable/x.py diff --git a/stdlib/test/test_import/__init__.py b/stdlib/test/test_import/__init__.py new file mode 100644 index 00000000..2e1c6d72 --- /dev/null +++ b/stdlib/test/test_import/__init__.py @@ -0,0 +1,3407 @@ +import builtins +import errno +import glob +import json +import importlib.util +from importlib._bootstrap_external import _get_sourcefile +from importlib.machinery import ( + AppleFrameworkLoader, + BuiltinImporter, + ExtensionFileLoader, + FrozenImporter, + SourceFileLoader, +) +import marshal +import os +import py_compile +import random +import shutil +import stat +import subprocess +import sys +import textwrap +import threading +import time +import types +import unittest +from unittest import mock +import _imp + +from test.support import os_helper +from test.support import ( + STDLIB_DIR, + swap_attr, + swap_item, + cpython_only, + is_apple_mobile, + is_emscripten, + is_wasm32, + run_in_subinterp, + run_in_subinterp_with_config, + Py_TRACE_REFS, + requires_gil_enabled, + Py_GIL_DISABLED, + no_rerun, + force_not_colorized_test_class, + catch_unraisable_exception +) +from test.support.import_helper import ( + forget, make_legacy_pyc, unlink, unload, ready_to_import, + DirsOnSysPath, CleanImport, import_module) +from test.support.os_helper import ( + TESTFN, rmtree, temp_umask, TESTFN_UNENCODABLE) +from test.support import script_helper +from test.support import threading_helper +from test.test_importlib.util import uncache +from types import ModuleType +try: + import _testsinglephase +except ImportError: + _testsinglephase = None +try: + import _testmultiphase +except ImportError: + _testmultiphase = None +try: + import _interpreters +except ModuleNotFoundError: + _interpreters = None +try: + import _testinternalcapi +except ImportError: + _testinternalcapi = None + + +skip_if_dont_write_bytecode = unittest.skipIf( + sys.dont_write_bytecode, + "test meaningful only when writing bytecode") + + +def _require_loader(module, loader, skip): + if isinstance(module, str): + module = __import__(module) + + MODULE_KINDS = { + BuiltinImporter: 'built-in', + ExtensionFileLoader: 'extension', + AppleFrameworkLoader: 'framework extension', + FrozenImporter: 'frozen', + SourceFileLoader: 'pure Python', + } + + expected = loader + assert isinstance(expected, type), expected + expected = MODULE_KINDS[expected] + + actual = module.__spec__.loader + if not isinstance(actual, type): + actual = type(actual) + actual = MODULE_KINDS[actual] + + if actual != expected: + err = f'expected module to be {expected}, got {module.__spec__}' + if skip: + raise unittest.SkipTest(err) + raise Exception(err) + return module + +def require_builtin(module, *, skip=False): + module = _require_loader(module, BuiltinImporter, skip) + assert module.__spec__.origin == 'built-in', module.__spec__ + +def require_extension(module, *, skip=False): + # Apple extensions must be distributed as frameworks. This requires + # a specialist loader. + if is_apple_mobile: + _require_loader(module, AppleFrameworkLoader, skip) + else: + _require_loader(module, ExtensionFileLoader, skip) + +def require_frozen(module, *, skip=True): + module = _require_loader(module, FrozenImporter, skip) + assert module.__spec__.origin == 'frozen', module.__spec__ + +def require_pure_python(module, *, skip=False): + _require_loader(module, SourceFileLoader, skip) + +def create_extension_loader(modname, filename): + # Apple extensions must be distributed as frameworks. This requires + # a specialist loader. + if is_apple_mobile: + return AppleFrameworkLoader(modname, filename) + else: + return ExtensionFileLoader(modname, filename) + +def import_extension_from_file(modname, filename, *, put_in_sys_modules=True): + loader = create_extension_loader(modname, filename) + spec = importlib.util.spec_from_loader(modname, loader) + module = importlib.util.module_from_spec(spec) + loader.exec_module(module) + if put_in_sys_modules: + sys.modules[modname] = module + return module + + +def remove_files(name): + for f in (name + ".py", + name + ".pyc", + name + ".pyw", + name + "$py.class"): + unlink(f) + rmtree('__pycache__') + + +if _testsinglephase is not None: + def restore__testsinglephase(*, _orig=_testsinglephase): + # We started with the module imported and want to restore + # it to its nominal state. + sys.modules.pop('_testsinglephase', None) + _orig._clear_globals() + origin = _orig.__spec__.origin + _testinternalcapi.clear_extension('_testsinglephase', origin) + import _testsinglephase + + +def requires_singlephase_init(meth): + """Decorator to skip if single-phase init modules are not supported.""" + if not isinstance(meth, type): + def meth(self, _meth=meth): + try: + return _meth(self) + finally: + restore__testsinglephase() + meth = cpython_only(meth) + msg = "gh-117694: free-threaded build does not currently support single-phase init modules in sub-interpreters" + meth = requires_gil_enabled(msg)(meth) + return unittest.skipIf(_testsinglephase is None, + 'test requires _testsinglephase module')(meth) + + +def requires_subinterpreters(meth): + """Decorator to skip a test if subinterpreters are not supported.""" + return unittest.skipIf(_interpreters is None, + 'subinterpreters required')(meth) + + +class ModuleSnapshot(types.SimpleNamespace): + """A representation of a module for testing. + + Fields: + + * id - the module's object ID + * module - the actual module or an adequate substitute + * __file__ + * __spec__ + * name + * origin + * ns - a copy (dict) of the module's __dict__ (or None) + * ns_id - the object ID of the module's __dict__ + * cached - the sys.modules[mod.__spec__.name] entry (or None) + * cached_id - the object ID of the sys.modules entry (or None) + + In cases where the value is not available (e.g. due to serialization), + the value will be None. + """ + _fields = tuple('id module ns ns_id cached cached_id'.split()) + + @classmethod + def from_module(cls, mod): + name = mod.__spec__.name + cached = sys.modules.get(name) + return cls( + id=id(mod), + module=mod, + ns=types.SimpleNamespace(**mod.__dict__), + ns_id=id(mod.__dict__), + cached=cached, + cached_id=id(cached), + ) + + SCRIPT = textwrap.dedent(''' + {imports} + + name = {name!r} + + {prescript} + + mod = {name} + + {body} + + {postscript} + ''') + IMPORTS = textwrap.dedent(''' + import sys + ''').strip() + SCRIPT_BODY = textwrap.dedent(''' + # Capture the snapshot data. + cached = sys.modules.get(name) + snapshot = dict( + id=id(mod), + module=dict( + __file__=mod.__file__, + __spec__=dict( + name=mod.__spec__.name, + origin=mod.__spec__.origin, + ), + ), + ns=None, + ns_id=id(mod.__dict__), + cached=None, + cached_id=id(cached) if cached else None, + ) + ''').strip() + CLEANUP_SCRIPT = textwrap.dedent(''' + # Clean up the module. + sys.modules.pop(name, None) + ''').strip() + + @classmethod + def build_script(cls, name, *, + prescript=None, + import_first=False, + postscript=None, + postcleanup=False, + ): + if postcleanup is True: + postcleanup = cls.CLEANUP_SCRIPT + elif isinstance(postcleanup, str): + postcleanup = textwrap.dedent(postcleanup).strip() + postcleanup = cls.CLEANUP_SCRIPT + os.linesep + postcleanup + else: + postcleanup = '' + prescript = textwrap.dedent(prescript).strip() if prescript else '' + postscript = textwrap.dedent(postscript).strip() if postscript else '' + + if postcleanup: + if postscript: + postscript = postscript + os.linesep * 2 + postcleanup + else: + postscript = postcleanup + + if import_first: + prescript += textwrap.dedent(f''' + + # Now import the module. + assert name not in sys.modules + import {name}''') + + return cls.SCRIPT.format( + imports=cls.IMPORTS.strip(), + name=name, + prescript=prescript.strip(), + body=cls.SCRIPT_BODY.strip(), + postscript=postscript, + ) + + @classmethod + def parse(cls, text): + raw = json.loads(text) + mod = raw['module'] + mod['__spec__'] = types.SimpleNamespace(**mod['__spec__']) + raw['module'] = types.SimpleNamespace(**mod) + return cls(**raw) + + @classmethod + def from_subinterp(cls, name, interpid=None, *, pipe=None, **script_kwds): + if pipe is not None: + return cls._from_subinterp(name, interpid, pipe, script_kwds) + pipe = os.pipe() + try: + return cls._from_subinterp(name, interpid, pipe, script_kwds) + finally: + r, w = pipe + os.close(r) + os.close(w) + + @classmethod + def _from_subinterp(cls, name, interpid, pipe, script_kwargs): + r, w = pipe + + # Build the script. + postscript = textwrap.dedent(f''' + # Send the result over the pipe. + import json + import os + os.write({w}, json.dumps(snapshot).encode()) + + ''') + _postscript = script_kwargs.get('postscript') + if _postscript: + _postscript = textwrap.dedent(_postscript).lstrip() + postscript += _postscript + script_kwargs['postscript'] = postscript.strip() + script = cls.build_script(name, **script_kwargs) + + # Run the script. + if interpid is None: + ret = run_in_subinterp(script) + if ret != 0: + raise AssertionError(f'{ret} != 0') + else: + _interpreters.run_string(interpid, script) + + # Parse the results. + text = os.read(r, 1000) + return cls.parse(text.decode()) + + +@force_not_colorized_test_class +class ImportTests(unittest.TestCase): + + def setUp(self): + remove_files(TESTFN) + importlib.invalidate_caches() + + def tearDown(self): + unload(TESTFN) + + def test_import_raises_ModuleNotFoundError(self): + with self.assertRaises(ModuleNotFoundError): + import something_that_should_not_exist_anywhere + + def test_from_import_missing_module_raises_ModuleNotFoundError(self): + with self.assertRaises(ModuleNotFoundError): + from something_that_should_not_exist_anywhere import blah + + def test_from_import_missing_attr_raises_ImportError(self): + with self.assertRaises(ImportError): + from importlib import something_that_should_not_exist_anywhere + + def test_from_import_missing_attr_has_name_and_path(self): + with CleanImport('os'): + import os + with self.assertRaises(ImportError) as cm: + from os import i_dont_exist + self.assertEqual(cm.exception.name, 'os') + self.assertEqual(cm.exception.path, os.__file__) + self.assertRegex(str(cm.exception), r"cannot import name 'i_dont_exist' from 'os' \(.*os.py\)") + + @cpython_only + def test_from_import_missing_attr_has_name_and_so_path(self): + _testcapi = import_module("_testcapi") + with self.assertRaises(ImportError) as cm: + from _testcapi import i_dont_exist + self.assertEqual(cm.exception.name, '_testcapi') + if hasattr(_testcapi, "__file__"): + # The path on the exception is strictly the spec origin, not the + # module's __file__. For most cases, these are the same; but on + # iOS, the Framework relocation process results in the exception + # being raised from the spec location. + self.assertEqual(cm.exception.path, _testcapi.__spec__.origin) + self.assertRegex( + str(cm.exception), + r"cannot import name 'i_dont_exist' from '_testcapi' \(.*(\.(so|pyd))?\)" + ) + else: + self.assertEqual( + str(cm.exception), + "cannot import name 'i_dont_exist' from '_testcapi' (unknown location)" + ) + + def test_from_import_missing_attr_has_name(self): + with self.assertRaises(ImportError) as cm: + # _warning has no path as it's a built-in module. + from _warning import i_dont_exist + self.assertEqual(cm.exception.name, '_warning') + self.assertIsNone(cm.exception.path) + + def test_from_import_missing_attr_path_is_canonical(self): + with self.assertRaises(ImportError) as cm: + from os.path import i_dont_exist + self.assertIn(cm.exception.name, {'posixpath', 'ntpath'}) + self.assertIsNotNone(cm.exception) + + def test_from_import_star_invalid_type(self): + import re + with ready_to_import() as (name, path): + with open(path, 'w', encoding='utf-8') as f: + f.write("__all__ = [b'invalid_type']") + globals = {} + with self.assertRaisesRegex( + TypeError, f"{re.escape(name)}\\.__all__ must be str" + ): + exec(f"from {name} import *", globals) + self.assertNotIn(b"invalid_type", globals) + with ready_to_import() as (name, path): + with open(path, 'w', encoding='utf-8') as f: + f.write("globals()[b'invalid_type'] = object()") + globals = {} + with self.assertRaisesRegex( + TypeError, f"{re.escape(name)}\\.__dict__ must be str" + ): + exec(f"from {name} import *", globals) + self.assertNotIn(b"invalid_type", globals) + + def test_case_sensitivity(self): + # Brief digression to test that import is case-sensitive: if we got + # this far, we know for sure that "random" exists. + with self.assertRaises(ImportError): + import RAnDoM + + def test_double_const(self): + # Importing double_const checks that float constants + # serialized by marshal as PYC files don't lose precision + # (SF bug 422177). + from test.test_import.data import double_const + unload('test.test_import.data.double_const') + from test.test_import.data import double_const # noqa: F811 + + def test_import(self): + def test_with_extension(ext): + # The extension is normally ".py", perhaps ".pyw". + source = TESTFN + ext + pyc = TESTFN + ".pyc" + + with open(source, "w", encoding='utf-8') as f: + print("# This tests Python's ability to import a", + ext, "file.", file=f) + a = random.randrange(1000) + b = random.randrange(1000) + print("a =", a, file=f) + print("b =", b, file=f) + + if TESTFN in sys.modules: + del sys.modules[TESTFN] + importlib.invalidate_caches() + try: + try: + mod = __import__(TESTFN) + except ImportError as err: + self.fail("import from %s failed: %s" % (ext, err)) + + self.assertEqual(mod.a, a, + "module loaded (%s) but contents invalid" % mod) + self.assertEqual(mod.b, b, + "module loaded (%s) but contents invalid" % mod) + finally: + forget(TESTFN) + unlink(source) + unlink(pyc) + + sys.path.insert(0, os.curdir) + try: + test_with_extension(".py") + if sys.platform.startswith("win"): + for ext in [".PY", ".Py", ".pY", ".pyw", ".PYW", ".pYw"]: + test_with_extension(ext) + finally: + del sys.path[0] + + def test_module_with_large_stack(self, module='longlist'): + # Regression test for http://bugs.python.org/issue561858. + filename = module + '.py' + + # Create a file with a list of 65000 elements. + with open(filename, 'w', encoding='utf-8') as f: + f.write('d = [\n') + for i in range(65000): + f.write('"",\n') + f.write(']') + + try: + # Compile & remove .py file; we only need .pyc. + # Bytecode must be relocated from the PEP 3147 bytecode-only location. + py_compile.compile(filename) + finally: + unlink(filename) + + # Need to be able to load from current dir. + sys.path.append('') + importlib.invalidate_caches() + + namespace = {} + try: + make_legacy_pyc(filename) + # This used to crash. + exec('import ' + module, None, namespace) + finally: + # Cleanup. + del sys.path[-1] + unlink(filename + 'c') + unlink(filename + 'o') + + # Remove references to the module (unload the module) + namespace.clear() + try: + del sys.modules[module] + except KeyError: + pass + + def test_failing_import_sticks(self): + source = TESTFN + ".py" + with open(source, "w", encoding='utf-8') as f: + print("a = 1/0", file=f) + + # New in 2.4, we shouldn't be able to import that no matter how often + # we try. + sys.path.insert(0, os.curdir) + importlib.invalidate_caches() + if TESTFN in sys.modules: + del sys.modules[TESTFN] + try: + for i in [1, 2, 3]: + self.assertRaises(ZeroDivisionError, __import__, TESTFN) + self.assertNotIn(TESTFN, sys.modules, + "damaged module in sys.modules on %i try" % i) + finally: + del sys.path[0] + remove_files(TESTFN) + + def test_import_name_binding(self): + # import x.y.z binds x in the current namespace + import test as x + import test.support + self.assertIs(x, test, x.__name__) + self.assertHasAttr(test.support, "__file__") + + # import x.y.z as w binds z as w + import test.support as y + self.assertIs(y, test.support, y.__name__) + + def test_issue31286(self): + # import in a 'finally' block resulted in SystemError + try: + x = ... + finally: + import test.support.script_helper as x + + # import in a 'while' loop resulted in stack overflow + i = 0 + while i < 10: + import test.support.script_helper as x + i += 1 + + # import in a 'for' loop resulted in segmentation fault + for i in range(2): + import test.support.script_helper as x # noqa: F811 + + def test_failing_reload(self): + # A failing reload should leave the module object in sys.modules. + source = TESTFN + os.extsep + "py" + with open(source, "w", encoding='utf-8') as f: + f.write("a = 1\nb=2\n") + + sys.path.insert(0, os.curdir) + try: + mod = __import__(TESTFN) + self.assertIn(TESTFN, sys.modules) + self.assertEqual(mod.a, 1, "module has wrong attribute values") + self.assertEqual(mod.b, 2, "module has wrong attribute values") + + # On WinXP, just replacing the .py file wasn't enough to + # convince reload() to reparse it. Maybe the timestamp didn't + # move enough. We force it to get reparsed by removing the + # compiled file too. + remove_files(TESTFN) + + # Now damage the module. + with open(source, "w", encoding='utf-8') as f: + f.write("a = 10\nb=20//0\n") + + self.assertRaises(ZeroDivisionError, importlib.reload, mod) + # But we still expect the module to be in sys.modules. + mod = sys.modules.get(TESTFN) + self.assertIsNotNone(mod, "expected module to be in sys.modules") + + # We should have replaced a w/ 10, but the old b value should + # stick. + self.assertEqual(mod.a, 10, "module has wrong attribute values") + self.assertEqual(mod.b, 2, "module has wrong attribute values") + + finally: + del sys.path[0] + remove_files(TESTFN) + unload(TESTFN) + + @skip_if_dont_write_bytecode + def test_file_to_source(self): + # check if __file__ points to the source file where available + source = TESTFN + ".py" + with open(source, "w", encoding='utf-8') as f: + f.write("test = None\n") + + sys.path.insert(0, os.curdir) + try: + mod = __import__(TESTFN) + self.assertEndsWith(mod.__file__, '.py') + os.remove(source) + del sys.modules[TESTFN] + make_legacy_pyc(source) + importlib.invalidate_caches() + mod = __import__(TESTFN) + base, ext = os.path.splitext(mod.__file__) + self.assertEqual(ext, '.pyc') + finally: + del sys.path[0] + remove_files(TESTFN) + if TESTFN in sys.modules: + del sys.modules[TESTFN] + + def test_import_by_filename(self): + path = os.path.abspath(TESTFN) + encoding = sys.getfilesystemencoding() + try: + path.encode(encoding) + except UnicodeEncodeError: + self.skipTest('path is not encodable to {}'.format(encoding)) + with self.assertRaises(ImportError) as c: + __import__(path) + + def test_import_in_del_does_not_crash(self): + # Issue 4236 + testfn = script_helper.make_script('', TESTFN, textwrap.dedent("""\ + import sys + class C: + def __del__(self): + import importlib + sys.argv.insert(0, C()) + """)) + script_helper.assert_python_ok(testfn) + + @skip_if_dont_write_bytecode + def test_timestamp_overflow(self): + # A modification timestamp larger than 2**32 should not be a problem + # when importing a module (issue #11235). + sys.path.insert(0, os.curdir) + try: + source = TESTFN + ".py" + compiled = importlib.util.cache_from_source(source) + with open(source, 'w', encoding='utf-8') as f: + pass + try: + os.utime(source, (2 ** 33 - 5, 2 ** 33 - 5)) + except OverflowError: + self.skipTest("cannot set modification time to large integer") + except OSError as e: + if e.errno not in (getattr(errno, 'EOVERFLOW', None), + getattr(errno, 'EINVAL', None)): + raise + self.skipTest("cannot set modification time to large integer ({})".format(e)) + __import__(TESTFN) + # The pyc file was created. + os.stat(compiled) + finally: + del sys.path[0] + remove_files(TESTFN) + + def test_bogus_fromlist(self): + try: + __import__('http', fromlist=['blah']) + except ImportError: + self.fail("fromlist must allow bogus names") + + @cpython_only + def test_delete_builtins_import(self): + args = ["-c", "del __builtins__.__import__; import os"] + popen = script_helper.spawn_python(*args) + stdout, stderr = popen.communicate() + self.assertIn(b"ImportError", stdout) + + def test_from_import_message_for_nonexistent_module(self): + with self.assertRaisesRegex(ImportError, "^No module named 'bogus'"): + from bogus import foo + + def test_from_import_message_for_existing_module(self): + with self.assertRaisesRegex(ImportError, "^cannot import name 'bogus'"): + from re import bogus + + def test_from_import_AttributeError(self): + # Issue #24492: trying to import an attribute that raises an + # AttributeError should lead to an ImportError. + class AlwaysAttributeError: + def __getattr__(self, _): + raise AttributeError + + module_name = 'test_from_import_AttributeError' + self.addCleanup(unload, module_name) + sys.modules[module_name] = AlwaysAttributeError() + with self.assertRaises(ImportError) as cm: + from test_from_import_AttributeError import does_not_exist + + self.assertEqual(str(cm.exception), + "cannot import name 'does_not_exist' from '' (unknown location)") + + @cpython_only + def test_issue31492(self): + # There shouldn't be an assertion failure in case of failing to import + # from a module with a bad __name__ attribute, or in case of failing + # to access an attribute of such a module. + with swap_attr(os, '__name__', None): + with self.assertRaises(ImportError): + from os import does_not_exist + + with self.assertRaises(AttributeError): + os.does_not_exist + + @threading_helper.requires_working_threading() + def test_concurrency(self): + # bpo 38091: this is a hack to slow down the code that calls + # has_deadlock(); the logic was itself sometimes deadlocking. + def delay_has_deadlock(frame, event, arg): + if event == 'call' and frame.f_code.co_name == 'has_deadlock': + time.sleep(0.1) + + sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'data')) + try: + exc = None + def run(): + sys.settrace(delay_has_deadlock) + event.wait() + try: + import package + except BaseException as e: + nonlocal exc + exc = e + sys.settrace(None) + + for i in range(10): + event = threading.Event() + threads = [threading.Thread(target=run) for x in range(2)] + try: + with threading_helper.start_threads(threads, event.set): + time.sleep(0) + finally: + sys.modules.pop('package', None) + sys.modules.pop('package.submodule', None) + if exc is not None: + raise exc + finally: + del sys.path[0] + + @unittest.skipUnless(sys.platform == "win32", "Windows-specific") + def test_dll_dependency_import(self): + from _winapi import GetModuleFileName + dllname = GetModuleFileName(sys.dllhandle) + pydname = importlib.util.find_spec("_sqlite3").origin + depname = os.path.join( + os.path.dirname(pydname), + "sqlite3{}.dll".format("_d" if "_d" in pydname else "")) + + with os_helper.temp_dir() as tmp: + tmp2 = os.path.join(tmp, "DLLs") + os.mkdir(tmp2) + + pyexe = os.path.join(tmp, os.path.basename(sys.executable)) + shutil.copy(sys.executable, pyexe) + shutil.copy(dllname, tmp) + for f in glob.glob(os.path.join(glob.escape(sys.prefix), "vcruntime*.dll")): + shutil.copy(f, tmp) + + shutil.copy(pydname, tmp2) + + env = None + env = {k.upper(): os.environ[k] for k in os.environ} + env["PYTHONPATH"] = tmp2 + ";" + STDLIB_DIR + + # Test 1: import with added DLL directory + subprocess.check_call([ + pyexe, "-Sc", ";".join([ + "import os", + "p = os.add_dll_directory({!r})".format( + os.path.dirname(depname)), + "import _sqlite3", + "p.close" + ])], + stderr=subprocess.STDOUT, + env=env, + cwd=os.path.dirname(pyexe)) + + # Test 2: import with DLL adjacent to PYD + shutil.copy(depname, tmp2) + subprocess.check_call([pyexe, "-Sc", "import _sqlite3"], + stderr=subprocess.STDOUT, + env=env, + cwd=os.path.dirname(pyexe)) + + def test_issue105979(self): + # this used to crash + with self.assertRaises(ImportError) as cm: + _imp.get_frozen_object("x", b"6\'\xd5Cu\x12") + self.assertIn("Frozen object named 'x' is invalid", + str(cm.exception)) + + def test_frozen_module_from_import_error(self): + with self.assertRaises(ImportError) as cm: + from os import this_will_never_exist + self.assertIn( + f"cannot import name 'this_will_never_exist' from 'os' ({os.__file__})", + str(cm.exception), + ) + with self.assertRaises(ImportError) as cm: + from sys import this_will_never_exist + self.assertIn( + "cannot import name 'this_will_never_exist' from 'sys' (unknown location)", + str(cm.exception), + ) + + scripts = [ + """ +import os +os.__spec__.has_location = False +os.__file__ = [] +from os import this_will_never_exist +""", + """ +import os +os.__spec__.has_location = False +del os.__file__ +from os import this_will_never_exist +""", + """ +import os +os.__spec__.origin = [] +os.__file__ = [] +from os import this_will_never_exist +""" + ] + for script in scripts: + with self.subTest(script=script): + expected_error = ( + b"cannot import name 'this_will_never_exist' " + b"from 'os' (unknown location)" + ) + popen = script_helper.spawn_python("-c", script) + stdout, stderr = popen.communicate() + self.assertIn(expected_error, stdout) + + def test_non_module_from_import_error(self): + prefix = """ +import sys +class NotAModule: ... +nm = NotAModule() +nm.symbol = 123 +sys.modules["not_a_module"] = nm +from not_a_module import symbol +""" + scripts = [ + prefix + "from not_a_module import missing_symbol", + prefix + "nm.__spec__ = []\nfrom not_a_module import missing_symbol", + ] + for script in scripts: + with self.subTest(script=script): + expected_error = ( + b"ImportError: cannot import name 'missing_symbol' from " + b"'' (unknown location)" + ) + popen = script_helper.spawn_python("-c", script) + stdout, stderr = popen.communicate() + self.assertIn(expected_error, stdout) + + def test_script_shadowing_stdlib(self): + script_errors = [ + ( + "import fractions\nfractions.Fraction", + rb"AttributeError: module 'fractions' has no attribute 'Fraction'" + ), + ( + "from fractions import Fraction", + rb"ImportError: cannot import name 'Fraction' from 'fractions'" + ) + ] + for script, error in script_errors: + with self.subTest(script=script), os_helper.temp_dir() as tmp: + with open(os.path.join(tmp, "fractions.py"), "w", encoding='utf-8') as f: + f.write(script) + + expected_error = error + ( + rb" \(consider renaming '.*fractions.py' since it has the " + rb"same name as the standard library module named 'fractions' " + rb"and prevents importing that standard library module\)" + ) + + popen = script_helper.spawn_python(os.path.join(tmp, "fractions.py"), cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + popen = script_helper.spawn_python('-m', 'fractions', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + popen = script_helper.spawn_python('-c', 'import fractions', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + # and there's no error at all when using -P + popen = script_helper.spawn_python('-P', 'fractions.py', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertEqual(stdout, b'') + + tmp_child = os.path.join(tmp, "child") + os.mkdir(tmp_child) + + # test the logic with different cwd + popen = script_helper.spawn_python(os.path.join(tmp, "fractions.py"), cwd=tmp_child) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + popen = script_helper.spawn_python('-m', 'fractions', cwd=tmp_child) + stdout, stderr = popen.communicate() + self.assertEqual(stdout, b'') # no error + + popen = script_helper.spawn_python('-c', 'import fractions', cwd=tmp_child) + stdout, stderr = popen.communicate() + self.assertEqual(stdout, b'') # no error + + def test_package_shadowing_stdlib_module(self): + script_errors = [ + ( + "fractions.Fraction", + rb"AttributeError: module 'fractions' has no attribute 'Fraction'" + ), + ( + "from fractions import Fraction", + rb"ImportError: cannot import name 'Fraction' from 'fractions'" + ) + ] + for script, error in script_errors: + with self.subTest(script=script), os_helper.temp_dir() as tmp: + os.mkdir(os.path.join(tmp, "fractions")) + with open( + os.path.join(tmp, "fractions", "__init__.py"), "w", encoding='utf-8' + ) as f: + f.write("shadowing_module = True") + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write("import fractions; fractions.shadowing_module\n") + f.write(script) + + expected_error = error + ( + rb" \(consider renaming '.*[\\/]fractions[\\/]+__init__.py' since it has the " + rb"same name as the standard library module named 'fractions' " + rb"and prevents importing that standard library module\)" + ) + + popen = script_helper.spawn_python(os.path.join(tmp, "main.py"), cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + popen = script_helper.spawn_python('-m', 'main', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + # and there's no shadowing at all when using -P + popen = script_helper.spawn_python('-P', 'main.py', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, b"module 'fractions' has no attribute 'shadowing_module'") + + def test_script_shadowing_third_party(self): + script_errors = [ + ( + "import numpy\nnumpy.array", + rb"AttributeError: module 'numpy' has no attribute 'array'" + ), + ( + "from numpy import array", + rb"ImportError: cannot import name 'array' from 'numpy'" + ) + ] + for script, error in script_errors: + with self.subTest(script=script), os_helper.temp_dir() as tmp: + with open(os.path.join(tmp, "numpy.py"), "w", encoding='utf-8') as f: + f.write(script) + + expected_error = error + ( + rb" \(consider renaming '.*numpy.py' if it has the " + rb"same name as a library you intended to import\)\s+\z" + ) + + popen = script_helper.spawn_python(os.path.join(tmp, "numpy.py")) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + popen = script_helper.spawn_python('-m', 'numpy', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + popen = script_helper.spawn_python('-c', 'import numpy', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + def test_script_maybe_not_shadowing_third_party(self): + with os_helper.temp_dir() as tmp: + with open(os.path.join(tmp, "numpy.py"), "w", encoding='utf-8') as f: + f.write("this_script_does_not_attempt_to_import_numpy = True") + + expected_error = ( + rb"AttributeError: module 'numpy' has no attribute 'attr'\s+\z" + ) + popen = script_helper.spawn_python('-c', 'import numpy; numpy.attr', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + expected_error = ( + rb"ImportError: cannot import name 'attr' from 'numpy' \(.*\)\s+\z" + ) + popen = script_helper.spawn_python('-c', 'from numpy import attr', cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + def test_script_shadowing_stdlib_edge_cases(self): + with os_helper.temp_dir() as tmp: + with open(os.path.join(tmp, "fractions.py"), "w", encoding='utf-8') as f: + f.write("shadowing_module = True") + + # Unhashable str subclass + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write(""" +import fractions +fractions.shadowing_module +class substr(str): + __hash__ = None +fractions.__name__ = substr('fractions') +try: + fractions.Fraction +except TypeError as e: + print(str(e)) +""") + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + self.assertIn(b"unhashable type: 'substr'", stdout.rstrip()) + + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write(""" +import fractions +fractions.shadowing_module +class substr(str): + __hash__ = None +fractions.__name__ = substr('fractions') +try: + from fractions import Fraction +except TypeError as e: + print(str(e)) +""") + + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + self.assertIn(b"unhashable type: 'substr'", stdout.rstrip()) + + # Various issues with sys module + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write(""" +import fractions +fractions.shadowing_module + +import sys +sys.stdlib_module_names = None +try: + fractions.Fraction +except AttributeError as e: + print(str(e)) + +del sys.stdlib_module_names +try: + fractions.Fraction +except AttributeError as e: + print(str(e)) + +sys.path = [0] +try: + fractions.Fraction +except AttributeError as e: + print(str(e)) +""") + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + lines = stdout.splitlines() + self.assertEqual(len(lines), 3) + for line in lines: + self.assertEqual(line, b"module 'fractions' has no attribute 'Fraction'") + + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write(""" +import fractions +fractions.shadowing_module + +import sys +sys.stdlib_module_names = None +try: + from fractions import Fraction +except ImportError as e: + print(str(e)) + +del sys.stdlib_module_names +try: + from fractions import Fraction +except ImportError as e: + print(str(e)) + +sys.path = [0] +try: + from fractions import Fraction +except ImportError as e: + print(str(e)) +""") + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + lines = stdout.splitlines() + self.assertEqual(len(lines), 3) + for line in lines: + self.assertRegex(line, rb"cannot import name 'Fraction' from 'fractions' \(.*\)") + + # Various issues with origin + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write(""" +import fractions +fractions.shadowing_module +del fractions.__spec__.origin +try: + fractions.Fraction +except AttributeError as e: + print(str(e)) + +fractions.__spec__.origin = [] +try: + fractions.Fraction +except AttributeError as e: + print(str(e)) +""") + + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + lines = stdout.splitlines() + self.assertEqual(len(lines), 2) + for line in lines: + self.assertEqual(line, b"module 'fractions' has no attribute 'Fraction'") + + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write(""" +import fractions +fractions.shadowing_module +del fractions.__spec__.origin +try: + from fractions import Fraction +except ImportError as e: + print(str(e)) + +fractions.__spec__.origin = [] +try: + from fractions import Fraction +except ImportError as e: + print(str(e)) +""") + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + lines = stdout.splitlines() + self.assertEqual(len(lines), 2) + for line in lines: + self.assertRegex(line, rb"cannot import name 'Fraction' from 'fractions' \(.*\)") + + @unittest.skipIf(sys.platform == 'win32', 'Cannot delete cwd on Windows') + @unittest.skipIf(sys.platform == 'sunos5', 'Cannot delete cwd on Solaris/Illumos') + @unittest.skipIf(sys.platform.startswith('aix'), 'Cannot delete cwd on AIX') + def test_script_shadowing_stdlib_cwd_failure(self): + with os_helper.temp_dir() as tmp: + subtmp = os.path.join(tmp, "subtmp") + os.mkdir(subtmp) + with open(os.path.join(subtmp, "main.py"), "w", encoding='utf-8') as f: + f.write(f""" +import sys +assert sys.path[0] == '' + +import os +import shutil +shutil.rmtree(os.getcwd()) + +os.does_not_exist +""") + # Use -c to ensure sys.path[0] is "" + popen = script_helper.spawn_python("-c", "import main", cwd=subtmp) + stdout, stderr = popen.communicate() + expected_error = rb"AttributeError: module 'os' has no attribute 'does_not_exist'" + self.assertRegex(stdout, expected_error) + + def test_script_shadowing_stdlib_sys_path_modification(self): + script_errors = [ + ( + "import fractions\nfractions.Fraction", + rb"AttributeError: module 'fractions' has no attribute 'Fraction'" + ), + ( + "from fractions import Fraction", + rb"ImportError: cannot import name 'Fraction' from 'fractions'" + ) + ] + for script, error in script_errors: + with self.subTest(script=script), os_helper.temp_dir() as tmp: + with open(os.path.join(tmp, "fractions.py"), "w", encoding='utf-8') as f: + f.write("shadowing_module = True") + with open(os.path.join(tmp, "main.py"), "w", encoding='utf-8') as f: + f.write('import sys; sys.path.insert(0, "this_folder_does_not_exist")\n') + f.write(script) + expected_error = error + ( + rb" \(consider renaming '.*fractions.py' since it has the " + rb"same name as the standard library module named 'fractions' " + rb"and prevents importing that standard library module\)" + ) + + popen = script_helper.spawn_python("main.py", cwd=tmp) + stdout, stderr = popen.communicate() + self.assertRegex(stdout, expected_error) + + def test_create_dynamic_null(self): + with self.assertRaisesRegex(ValueError, 'embedded null character'): + class Spec: + name = "a\x00b" + origin = "abc" + _imp.create_dynamic(Spec()) + + with self.assertRaisesRegex(ValueError, 'embedded null character'): + class Spec2: + name = "abc" + origin = "a\x00b" + _imp.create_dynamic(Spec2()) + + +@skip_if_dont_write_bytecode +class FilePermissionTests(unittest.TestCase): + # tests for file mode on cached .pyc files + + @unittest.skipUnless(os.name == 'posix', + "test meaningful only on posix systems") + @unittest.skipIf( + is_wasm32, + "Emscripten's/WASI's umask is a stub." + ) + def test_creation_mode(self): + mask = 0o022 + with temp_umask(mask), ready_to_import() as (name, path): + cached_path = importlib.util.cache_from_source(path) + module = __import__(name) + if not os.path.exists(cached_path): + self.fail("__import__ did not result in creation of " + "a .pyc file") + stat_info = os.stat(cached_path) + + # Check that the umask is respected, and the executable bits + # aren't set. + self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)), + oct(0o666 & ~mask)) + + @unittest.skipUnless(os.name == 'posix', + "test meaningful only on posix systems") + @os_helper.skip_unless_working_chmod + def test_cached_mode_issue_2051(self): + # permissions of .pyc should match those of .py, regardless of mask + mode = 0o600 + with temp_umask(0o022), ready_to_import() as (name, path): + cached_path = importlib.util.cache_from_source(path) + os.chmod(path, mode) + __import__(name) + if not os.path.exists(cached_path): + self.fail("__import__ did not result in creation of " + "a .pyc file") + stat_info = os.stat(cached_path) + + self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)), oct(mode)) + + @unittest.skipUnless(os.name == 'posix', + "test meaningful only on posix systems") + @os_helper.skip_unless_working_chmod + def test_cached_readonly(self): + mode = 0o400 + with temp_umask(0o022), ready_to_import() as (name, path): + cached_path = importlib.util.cache_from_source(path) + os.chmod(path, mode) + __import__(name) + if not os.path.exists(cached_path): + self.fail("__import__ did not result in creation of " + "a .pyc file") + stat_info = os.stat(cached_path) + + expected = mode | 0o200 # Account for fix for issue #6074 + self.assertEqual(oct(stat.S_IMODE(stat_info.st_mode)), oct(expected)) + + def test_pyc_always_writable(self): + # Initially read-only .pyc files on Windows used to cause problems + # with later updates, see issue #6074 for details + with ready_to_import() as (name, path): + # Write a Python file, make it read-only and import it + with open(path, 'w', encoding='utf-8') as f: + f.write("x = 'original'\n") + # Tweak the mtime of the source to ensure pyc gets updated later + s = os.stat(path) + os.utime(path, (s.st_atime, s.st_mtime-100000000)) + os.chmod(path, 0o400) + m = __import__(name) + self.assertEqual(m.x, 'original') + # Change the file and then reimport it + os.chmod(path, 0o600) + with open(path, 'w', encoding='utf-8') as f: + f.write("x = 'rewritten'\n") + unload(name) + importlib.invalidate_caches() + m = __import__(name) + self.assertEqual(m.x, 'rewritten') + # Now delete the source file and check the pyc was rewritten + unlink(path) + unload(name) + importlib.invalidate_caches() + bytecode_only = path + "c" + os.rename(importlib.util.cache_from_source(path), bytecode_only) + m = __import__(name) + self.assertEqual(m.x, 'rewritten') + + +class PycRewritingTests(unittest.TestCase): + # Test that the `co_filename` attribute on code objects always points + # to the right file, even when various things happen (e.g. both the .py + # and the .pyc file are renamed). + + module_name = "unlikely_module_name" + module_source = """ +import sys +code_filename = sys._getframe().f_code.co_filename +module_filename = __file__ +constant = 1000 +def func(): + pass +func_filename = func.__code__.co_filename +""" + dir_name = os.path.abspath(TESTFN) + file_name = os.path.join(dir_name, module_name) + os.extsep + "py" + compiled_name = importlib.util.cache_from_source(file_name) + + def setUp(self): + self.sys_path = sys.path[:] + self.orig_module = sys.modules.pop(self.module_name, None) + os.mkdir(self.dir_name) + with open(self.file_name, "w", encoding='utf-8') as f: + f.write(self.module_source) + sys.path.insert(0, self.dir_name) + importlib.invalidate_caches() + + def tearDown(self): + sys.path[:] = self.sys_path + if self.orig_module is not None: + sys.modules[self.module_name] = self.orig_module + else: + unload(self.module_name) + unlink(self.file_name) + unlink(self.compiled_name) + rmtree(self.dir_name) + + def import_module(self): + ns = globals() + __import__(self.module_name, ns, ns) + return sys.modules[self.module_name] + + def test_basics(self): + mod = self.import_module() + self.assertEqual(mod.module_filename, self.file_name) + self.assertEqual(mod.code_filename, self.file_name) + self.assertEqual(mod.func_filename, self.file_name) + del sys.modules[self.module_name] + mod = self.import_module() + self.assertEqual(mod.module_filename, self.file_name) + self.assertEqual(mod.code_filename, self.file_name) + self.assertEqual(mod.func_filename, self.file_name) + + def test_incorrect_code_name(self): + py_compile.compile(self.file_name, dfile="another_module.py") + mod = self.import_module() + self.assertEqual(mod.module_filename, self.file_name) + self.assertEqual(mod.code_filename, self.file_name) + self.assertEqual(mod.func_filename, self.file_name) + + def test_module_without_source(self): + target = "another_module.py" + py_compile.compile(self.file_name, dfile=target) + os.remove(self.file_name) + pyc_file = make_legacy_pyc(self.file_name) + importlib.invalidate_caches() + mod = self.import_module() + self.assertEqual(mod.module_filename, pyc_file) + self.assertEqual(mod.code_filename, target) + self.assertEqual(mod.func_filename, target) + + def test_foreign_code(self): + py_compile.compile(self.file_name) + with open(self.compiled_name, "rb") as f: + header = f.read(16) + code = marshal.load(f) + constants = list(code.co_consts) + foreign_code = importlib.import_module.__code__ + pos = constants.index(1000) + constants[pos] = foreign_code + code = code.replace(co_consts=tuple(constants)) + with open(self.compiled_name, "wb") as f: + f.write(header) + marshal.dump(code, f) + mod = self.import_module() + self.assertEqual(mod.constant.co_filename, foreign_code.co_filename) + + +class PathsTests(unittest.TestCase): + SAMPLES = ('test', 'test\u00e4\u00f6\u00fc\u00df', 'test\u00e9\u00e8', + 'test\u00b0\u00b3\u00b2') + path = TESTFN + + def setUp(self): + os.mkdir(self.path) + self.syspath = sys.path[:] + + def tearDown(self): + rmtree(self.path) + sys.path[:] = self.syspath + + # Regression test for http://bugs.python.org/issue1293. + def test_trailing_slash(self): + with open(os.path.join(self.path, 'test_trailing_slash.py'), + 'w', encoding='utf-8') as f: + f.write("testdata = 'test_trailing_slash'") + sys.path.append(self.path+'/') + mod = __import__("test_trailing_slash") + self.assertEqual(mod.testdata, 'test_trailing_slash') + unload("test_trailing_slash") + + # Regression test for http://bugs.python.org/issue3677. + @unittest.skipUnless(sys.platform == 'win32', 'Windows-specific') + def test_UNC_path(self): + with open(os.path.join(self.path, 'test_unc_path.py'), 'w') as f: + f.write("testdata = 'test_unc_path'") + importlib.invalidate_caches() + # Create the UNC path, like \\myhost\c$\foo\bar. + path = os.path.abspath(self.path) + import socket + hn = socket.gethostname() + drive = path[0] + unc = "\\\\%s\\%s$"%(hn, drive) + unc += path[2:] + try: + os.listdir(unc) + except OSError as e: + if e.errno in (errno.EPERM, errno.EACCES, errno.ENOENT): + # See issue #15338 + self.skipTest("cannot access administrative share %r" % (unc,)) + raise + sys.path.insert(0, unc) + try: + mod = __import__("test_unc_path") + except ImportError as e: + self.fail("could not import 'test_unc_path' from %r: %r" + % (unc, e)) + self.assertEqual(mod.testdata, 'test_unc_path') + self.assertStartsWith(mod.__file__, unc) + unload("test_unc_path") + + +class RelativeImportTests(unittest.TestCase): + + def tearDown(self): + unload("test.relimport") + setUp = tearDown + + def test_relimport_star(self): + # This will import * from .test_import. + from .. import relimport + self.assertHasAttr(relimport, "RelativeImportTests") + + def test_issue3221(self): + # Note for mergers: the 'absolute' tests from the 2.x branch + # are missing in Py3k because implicit relative imports are + # a thing of the past + # + # Regression test for http://bugs.python.org/issue3221. + def check_relative(): + exec("from . import relimport", ns) + + # Check relative import OK with __package__ and __name__ correct + ns = dict(__package__='test', __name__='test.notarealmodule') + check_relative() + + # Check relative import OK with only __name__ wrong + ns = dict(__package__='test', __name__='notarealpkg.notarealmodule') + check_relative() + + # Check relative import fails with only __package__ wrong + ns = dict(__package__='foo', __name__='test.notarealmodule') + self.assertRaises(ModuleNotFoundError, check_relative) + + # Check relative import fails with __package__ and __name__ wrong + ns = dict(__package__='foo', __name__='notarealpkg.notarealmodule') + self.assertRaises(ModuleNotFoundError, check_relative) + + # Check relative import fails with package set to a non-string + ns = dict(__package__=object()) + self.assertRaises(TypeError, check_relative) + + def test_parentless_import_shadowed_by_global(self): + # Test as if this were done from the REPL where this error most commonly occurs (bpo-37409). + script_helper.assert_python_failure('-W', 'ignore', '-c', + "foo = 1; from . import foo") + + def test_absolute_import_without_future(self): + # If explicit relative import syntax is used, then do not try + # to perform an absolute import in the face of failure. + # Issue #7902. + with self.assertRaises(ImportError): + from .os import sep + self.fail("explicit relative import triggered an " + "implicit absolute import") + + def test_import_from_non_package(self): + path = os.path.join(os.path.dirname(__file__), 'data', 'package2') + with uncache('submodule1', 'submodule2'), DirsOnSysPath(path): + with self.assertRaises(ImportError): + import submodule1 + self.assertNotIn('submodule1', sys.modules) + self.assertNotIn('submodule2', sys.modules) + + def test_import_from_unloaded_package(self): + with uncache('package2', 'package2.submodule1', 'package2.submodule2'), \ + DirsOnSysPath(os.path.join(os.path.dirname(__file__), 'data')): + import package2.submodule1 + package2.submodule1.submodule2 + + def test_rebinding(self): + # The same data is also used for testing pkgutil.resolve_name() + # in test_pkgutil and mock.patch in test_unittest. + path = os.path.join(os.path.dirname(__file__), 'data') + with uncache('package3', 'package3.submodule'), DirsOnSysPath(path): + from package3 import submodule + self.assertEqual(submodule.attr, 'rebound') + import package3.submodule as submodule + self.assertEqual(submodule.attr, 'rebound') + with uncache('package3', 'package3.submodule'), DirsOnSysPath(path): + import package3.submodule as submodule + self.assertEqual(submodule.attr, 'rebound') + from package3 import submodule + self.assertEqual(submodule.attr, 'rebound') + + def test_rebinding2(self): + path = os.path.join(os.path.dirname(__file__), 'data') + with uncache('package4', 'package4.submodule'), DirsOnSysPath(path): + import package4.submodule as submodule + self.assertEqual(submodule.attr, 'submodule') + from package4 import submodule + self.assertEqual(submodule.attr, 'submodule') + with uncache('package4', 'package4.submodule'), DirsOnSysPath(path): + from package4 import submodule + self.assertEqual(submodule.attr, 'origin') + import package4.submodule as submodule + self.assertEqual(submodule.attr, 'submodule') + + +class OverridingImportBuiltinTests(unittest.TestCase): + def test_override_builtin(self): + # Test that overriding builtins.__import__ can bypass sys.modules. + import os + + def foo(): + import os + return os + self.assertEqual(foo(), os) # Quick sanity check. + + with swap_attr(builtins, "__import__", lambda *x: 5): + self.assertEqual(foo(), 5) + + # Test what happens when we shadow __import__ in globals(); this + # currently does not impact the import process, but if this changes, + # other code will need to change, so keep this test as a tripwire. + with swap_item(globals(), "__import__", lambda *x: 5): + self.assertEqual(foo(), os) + + +class PycacheTests(unittest.TestCase): + # Test the various PEP 3147/488-related behaviors. + + def _clean(self): + forget(TESTFN) + rmtree('__pycache__') + unlink(self.source) + + def setUp(self): + self.source = TESTFN + '.py' + self._clean() + with open(self.source, 'w', encoding='utf-8') as fp: + print('# This is a test file written by test_import.py', file=fp) + sys.path.insert(0, os.curdir) + importlib.invalidate_caches() + + def tearDown(self): + assert sys.path[0] == os.curdir, 'Unexpected sys.path[0]' + del sys.path[0] + self._clean() + + @skip_if_dont_write_bytecode + def test_import_pyc_path(self): + self.assertFalse(os.path.exists('__pycache__')) + __import__(TESTFN) + self.assertTrue(os.path.exists('__pycache__')) + pyc_path = importlib.util.cache_from_source(self.source) + self.assertTrue(os.path.exists(pyc_path), + 'bytecode file {!r} for {!r} does not ' + 'exist'.format(pyc_path, TESTFN)) + + @unittest.skipUnless(os.name == 'posix', + "test meaningful only on posix systems") + @skip_if_dont_write_bytecode + @os_helper.skip_unless_working_chmod + @os_helper.skip_if_dac_override + @unittest.skipIf(is_emscripten, "umask is a stub") + def test_unwritable_directory(self): + # When the umask causes the new __pycache__ directory to be + # unwritable, the import still succeeds but no .pyc file is written. + with temp_umask(0o222): + __import__(TESTFN) + self.assertTrue(os.path.exists('__pycache__')) + pyc_path = importlib.util.cache_from_source(self.source) + self.assertFalse(os.path.exists(pyc_path), + 'bytecode file {!r} for {!r} ' + 'exists'.format(pyc_path, TESTFN)) + + @skip_if_dont_write_bytecode + def test_missing_source(self): + # With PEP 3147 cache layout, removing the source but leaving the pyc + # file does not satisfy the import. + __import__(TESTFN) + pyc_file = importlib.util.cache_from_source(self.source) + self.assertTrue(os.path.exists(pyc_file)) + os.remove(self.source) + forget(TESTFN) + importlib.invalidate_caches() + self.assertRaises(ImportError, __import__, TESTFN) + + @skip_if_dont_write_bytecode + def test_missing_source_legacy(self): + # Like test_missing_source() except that for backward compatibility, + # when the pyc file lives where the py file would have been (and named + # without the tag), it is importable. The __file__ of the imported + # module is the pyc location. + __import__(TESTFN) + # pyc_file gets removed in _clean() via tearDown(). + pyc_file = make_legacy_pyc(self.source) + os.remove(self.source) + unload(TESTFN) + importlib.invalidate_caches() + m = __import__(TESTFN) + try: + self.assertEqual(m.__file__, + os.path.join(os.getcwd(), os.path.relpath(pyc_file))) + finally: + os.remove(pyc_file) + + def test___cached__(self): + # Modules now also have an __cached__ that points to the pyc file. + m = __import__(TESTFN) + pyc_file = importlib.util.cache_from_source(TESTFN + '.py') + self.assertEqual(m.__cached__, os.path.join(os.getcwd(), pyc_file)) + + @skip_if_dont_write_bytecode + def test___cached___legacy_pyc(self): + # Like test___cached__() except that for backward compatibility, + # when the pyc file lives where the py file would have been (and named + # without the tag), it is importable. The __cached__ of the imported + # module is the pyc location. + __import__(TESTFN) + # pyc_file gets removed in _clean() via tearDown(). + pyc_file = make_legacy_pyc(self.source) + os.remove(self.source) + unload(TESTFN) + importlib.invalidate_caches() + m = __import__(TESTFN) + self.assertEqual(m.__cached__, + os.path.join(os.getcwd(), os.path.relpath(pyc_file))) + + @skip_if_dont_write_bytecode + def test_package___cached__(self): + # Like test___cached__ but for packages. + def cleanup(): + rmtree('pep3147') + unload('pep3147.foo') + unload('pep3147') + os.mkdir('pep3147') + self.addCleanup(cleanup) + # Touch the __init__.py + with open(os.path.join('pep3147', '__init__.py'), 'wb'): + pass + with open(os.path.join('pep3147', 'foo.py'), 'wb'): + pass + importlib.invalidate_caches() + m = __import__('pep3147.foo') + init_pyc = importlib.util.cache_from_source( + os.path.join('pep3147', '__init__.py')) + self.assertEqual(m.__cached__, os.path.join(os.getcwd(), init_pyc)) + foo_pyc = importlib.util.cache_from_source(os.path.join('pep3147', 'foo.py')) + self.assertEqual(sys.modules['pep3147.foo'].__cached__, + os.path.join(os.getcwd(), foo_pyc)) + + def test_package___cached___from_pyc(self): + # Like test___cached__ but ensuring __cached__ when imported from a + # PEP 3147 pyc file. + def cleanup(): + rmtree('pep3147') + unload('pep3147.foo') + unload('pep3147') + os.mkdir('pep3147') + self.addCleanup(cleanup) + # Touch the __init__.py + with open(os.path.join('pep3147', '__init__.py'), 'wb'): + pass + with open(os.path.join('pep3147', 'foo.py'), 'wb'): + pass + importlib.invalidate_caches() + m = __import__('pep3147.foo') + unload('pep3147.foo') + unload('pep3147') + importlib.invalidate_caches() + m = __import__('pep3147.foo') + init_pyc = importlib.util.cache_from_source( + os.path.join('pep3147', '__init__.py')) + self.assertEqual(m.__cached__, os.path.join(os.getcwd(), init_pyc)) + foo_pyc = importlib.util.cache_from_source(os.path.join('pep3147', 'foo.py')) + self.assertEqual(sys.modules['pep3147.foo'].__cached__, + os.path.join(os.getcwd(), foo_pyc)) + + def test_recompute_pyc_same_second(self): + # Even when the source file doesn't change timestamp, a change in + # source size is enough to trigger recomputation of the pyc file. + __import__(TESTFN) + unload(TESTFN) + with open(self.source, 'a', encoding='utf-8') as fp: + print("x = 5", file=fp) + m = __import__(TESTFN) + self.assertEqual(m.x, 5) + + +class TestSymbolicallyLinkedPackage(unittest.TestCase): + package_name = 'sample' + tagged = package_name + '-tagged' + + def setUp(self): + os_helper.rmtree(self.tagged) + os_helper.rmtree(self.package_name) + self.orig_sys_path = sys.path[:] + + # create a sample package; imagine you have a package with a tag and + # you want to symbolically link it from its untagged name. + os.mkdir(self.tagged) + self.addCleanup(os_helper.rmtree, self.tagged) + init_file = os.path.join(self.tagged, '__init__.py') + os_helper.create_empty_file(init_file) + assert os.path.exists(init_file) + + # now create a symlink to the tagged package + # sample -> sample-tagged + os.symlink(self.tagged, self.package_name, target_is_directory=True) + self.addCleanup(os_helper.unlink, self.package_name) + importlib.invalidate_caches() + + self.assertEqual(os.path.isdir(self.package_name), True) + + assert os.path.isfile(os.path.join(self.package_name, '__init__.py')) + + def tearDown(self): + sys.path[:] = self.orig_sys_path + + # regression test for issue6727 + @unittest.skipUnless( + not hasattr(sys, 'getwindowsversion') + or sys.getwindowsversion() >= (6, 0), + "Windows Vista or later required") + @os_helper.skip_unless_symlink + def test_symlinked_dir_importable(self): + # make sure sample can only be imported from the current directory. + sys.path[:] = ['.'] + assert os.path.exists(self.package_name) + assert os.path.exists(os.path.join(self.package_name, '__init__.py')) + + # Try to import the package + importlib.import_module(self.package_name) + + +@cpython_only +class ImportlibBootstrapTests(unittest.TestCase): + # These tests check that importlib is bootstrapped. + + def test_frozen_importlib(self): + mod = sys.modules['_frozen_importlib'] + self.assertTrue(mod) + + def test_frozen_importlib_is_bootstrap(self): + from importlib import _bootstrap + mod = sys.modules['_frozen_importlib'] + self.assertIs(mod, _bootstrap) + self.assertEqual(mod.__name__, 'importlib._bootstrap') + self.assertEqual(mod.__package__, 'importlib') + self.assertEndsWith(mod.__file__, '_bootstrap.py') + + def test_frozen_importlib_external_is_bootstrap_external(self): + from importlib import _bootstrap_external + mod = sys.modules['_frozen_importlib_external'] + self.assertIs(mod, _bootstrap_external) + self.assertEqual(mod.__name__, 'importlib._bootstrap_external') + self.assertEqual(mod.__package__, 'importlib') + self.assertEndsWith(mod.__file__, '_bootstrap_external.py') + + def test_there_can_be_only_one(self): + # Issue #15386 revealed a tricky loophole in the bootstrapping + # This test is technically redundant, since the bug caused importing + # this test module to crash completely, but it helps prove the point + from importlib import machinery + mod = sys.modules['_frozen_importlib'] + self.assertIs(machinery.ModuleSpec, mod.ModuleSpec) + + +@cpython_only +class GetSourcefileTests(unittest.TestCase): + + """Test importlib._bootstrap_external._get_sourcefile() as used by the C API. + + Because of the peculiarities of the need of this function, the tests are + knowingly whitebox tests. + + """ + + def test_get_sourcefile(self): + # Given a valid bytecode path, return the path to the corresponding + # source file if it exists. + with mock.patch('importlib._bootstrap_external._path_isfile') as _path_isfile: + _path_isfile.return_value = True + path = TESTFN + '.pyc' + expect = TESTFN + '.py' + self.assertEqual(_get_sourcefile(path), expect) + + def test_get_sourcefile_no_source(self): + # Given a valid bytecode path without a corresponding source path, + # return the original bytecode path. + with mock.patch('importlib._bootstrap_external._path_isfile') as _path_isfile: + _path_isfile.return_value = False + path = TESTFN + '.pyc' + self.assertEqual(_get_sourcefile(path), path) + + def test_get_sourcefile_bad_ext(self): + # Given a path with an invalid bytecode extension, return the + # bytecode path passed as the argument. + path = TESTFN + '.bad_ext' + self.assertEqual(_get_sourcefile(path), path) + + +class ImportTracebackTests(unittest.TestCase): + + def setUp(self): + os.mkdir(TESTFN) + self.old_path = sys.path[:] + sys.path.insert(0, TESTFN) + + def tearDown(self): + sys.path[:] = self.old_path + rmtree(TESTFN) + + def create_module(self, mod, contents, ext=".py"): + fname = os.path.join(TESTFN, mod + ext) + with open(fname, "w", encoding='utf-8') as f: + f.write(contents) + self.addCleanup(unload, mod) + importlib.invalidate_caches() + return fname + + def assert_traceback(self, tb, files): + deduped_files = [] + while tb: + code = tb.tb_frame.f_code + fn = code.co_filename + if not deduped_files or fn != deduped_files[-1]: + deduped_files.append(fn) + tb = tb.tb_next + self.assertEqual(len(deduped_files), len(files), deduped_files) + for fn, pat in zip(deduped_files, files): + self.assertIn(pat, fn) + + def test_nonexistent_module(self): + try: + # assertRaises() clears __traceback__ + import nonexistent_xyzzy + except ImportError as e: + tb = e.__traceback__ + else: + self.fail("ImportError should have been raised") + self.assert_traceback(tb, [__file__]) + + def test_nonexistent_module_nested(self): + self.create_module("foo", "import nonexistent_xyzzy") + try: + import foo + except ImportError as e: + tb = e.__traceback__ + else: + self.fail("ImportError should have been raised") + self.assert_traceback(tb, [__file__, 'foo.py']) + + def test_exec_failure(self): + self.create_module("foo", "1/0") + try: + import foo + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ZeroDivisionError should have been raised") + self.assert_traceback(tb, [__file__, 'foo.py']) + + def test_exec_failure_nested(self): + self.create_module("foo", "import bar") + self.create_module("bar", "1/0") + try: + import foo + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ZeroDivisionError should have been raised") + self.assert_traceback(tb, [__file__, 'foo.py', 'bar.py']) + + # A few more examples from issue #15425 + def test_syntax_error(self): + self.create_module("foo", "invalid syntax is invalid") + try: + import foo + except SyntaxError as e: + tb = e.__traceback__ + else: + self.fail("SyntaxError should have been raised") + self.assert_traceback(tb, [__file__]) + + def _setup_broken_package(self, parent, child): + pkg_name = "_parent_foo" + self.addCleanup(unload, pkg_name) + pkg_path = os.path.join(TESTFN, pkg_name) + os.mkdir(pkg_path) + # Touch the __init__.py + init_path = os.path.join(pkg_path, '__init__.py') + with open(init_path, 'w', encoding='utf-8') as f: + f.write(parent) + bar_path = os.path.join(pkg_path, 'bar.py') + with open(bar_path, 'w', encoding='utf-8') as f: + f.write(child) + importlib.invalidate_caches() + return init_path, bar_path + + def test_broken_submodule(self): + init_path, bar_path = self._setup_broken_package("", "1/0") + try: + import _parent_foo.bar + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ZeroDivisionError should have been raised") + self.assert_traceback(tb, [__file__, bar_path]) + + def test_broken_from(self): + init_path, bar_path = self._setup_broken_package("", "1/0") + try: + from _parent_foo import bar + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ImportError should have been raised") + self.assert_traceback(tb, [__file__, bar_path]) + + def test_broken_parent(self): + init_path, bar_path = self._setup_broken_package("1/0", "") + try: + import _parent_foo.bar + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ZeroDivisionError should have been raised") + self.assert_traceback(tb, [__file__, init_path]) + + def test_broken_parent_from(self): + init_path, bar_path = self._setup_broken_package("1/0", "") + try: + from _parent_foo import bar + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ZeroDivisionError should have been raised") + self.assert_traceback(tb, [__file__, init_path]) + + @cpython_only + def test_import_bug(self): + # We simulate a bug in importlib and check that it's not stripped + # away from the traceback. + self.create_module("foo", "") + importlib = sys.modules['_frozen_importlib_external'] + if 'load_module' in vars(importlib.SourceLoader): + old_exec_module = importlib.SourceLoader.exec_module + else: + old_exec_module = None + try: + def exec_module(*args): + 1/0 + importlib.SourceLoader.exec_module = exec_module + try: + import foo + except ZeroDivisionError as e: + tb = e.__traceback__ + else: + self.fail("ZeroDivisionError should have been raised") + self.assert_traceback(tb, [__file__, 'imports.modules_by_index was set for the module). + self.assertEqual(snap.lookedup_id, snap.id) + self.assertEqual(snap.cached_id, snap.id) + with self.assertRaises(AttributeError): + snap.spam + else: + self.assertIs(snap.lookedup, mod) + self.assertIs(snap.cached, mod) + + def check_direct(self, loaded): + # The module has its own PyModuleDef, with a matching name. + self.assertEqual(loaded.module.__name__, loaded.name) + self.assertIs(loaded.snapshot.lookedup, loaded.module) + + def check_indirect(self, loaded, orig): + # The module re-uses another's PyModuleDef, with a different name. + assert orig is not loaded.module + assert orig.__name__ != loaded.name + self.assertNotEqual(loaded.module.__name__, loaded.name) + self.assertIs(loaded.snapshot.lookedup, loaded.module) + + def check_basic(self, loaded, expected_init_count): + # m_size == -1 + # The module loads fresh the first time and copies m_copy after. + snap = loaded.snapshot + self.assertIsNot(snap.state_initialized, None) + self.assertIsInstance(snap.init_count, int) + self.assertGreater(snap.init_count, 0) + self.assertEqual(snap.init_count, expected_init_count) + + def check_with_reinit(self, loaded): + # m_size >= 0 + # The module loads fresh every time. + pass + + def check_fresh(self, loaded): + """ + The module had not been loaded before (at least since fully reset). + """ + snap = loaded.snapshot + # The module's init func was run. + # A copy of the module's __dict__ was stored in def->m_base.m_copy. + # The previous m_copy was deleted first. + # _PyRuntime.imports.extensions was set. + self.assertEqual(snap.init_count, 1) + # The global state was initialized. + # The module attrs were initialized from that state. + self.assertEqual(snap.module._module_initialized, + snap.state_initialized) + + def check_semi_fresh(self, loaded, base, prev): + """ + The module had been loaded before and then reset + (but the module global state wasn't). + """ + snap = loaded.snapshot + # The module's init func was run again. + # A copy of the module's __dict__ was stored in def->m_base.m_copy. + # The previous m_copy was deleted first. + # The module globals did not get reset. + self.assertNotEqual(snap.id, base.snapshot.id) + self.assertNotEqual(snap.id, prev.snapshot.id) + self.assertEqual(snap.init_count, prev.snapshot.init_count + 1) + # The global state was updated. + # The module attrs were initialized from that state. + self.assertEqual(snap.module._module_initialized, + snap.state_initialized) + self.assertNotEqual(snap.state_initialized, + base.snapshot.state_initialized) + self.assertNotEqual(snap.state_initialized, + prev.snapshot.state_initialized) + + def check_copied(self, loaded, base): + """ + The module had been loaded before and never reset. + """ + snap = loaded.snapshot + # The module's init func was not run again. + # The interpreter copied m_copy, as set by the other interpreter, + # with objects owned by the other interpreter. + # The module globals did not get reset. + self.assertNotEqual(snap.id, base.snapshot.id) + self.assertEqual(snap.init_count, base.snapshot.init_count) + # The global state was not updated since the init func did not run. + # The module attrs were not directly initialized from that state. + # The state and module attrs still match the previous loading. + self.assertEqual(snap.module._module_initialized, + snap.state_initialized) + self.assertEqual(snap.state_initialized, + base.snapshot.state_initialized) + + ######################### + # the tests + + def test_cleared_globals(self): + loaded = self.load(self.NAME) + _testsinglephase = loaded.module + init_before = _testsinglephase.state_initialized() + + _testsinglephase._clear_globals() + init_after = _testsinglephase.state_initialized() + init_count = _testsinglephase.initialized_count() + + self.assertGreater(init_before, 0) + self.assertEqual(init_after, 0) + self.assertEqual(init_count, -1) + + def test_variants(self): + # Exercise the most meaningful variants described in Python/import.c. + self.maxDiff = None + + # Check the "basic" module. + + name = self.NAME + expected_init_count = 1 + with self.subTest(name): + loaded = self.load(name) + + self.check_common(loaded) + self.check_direct(loaded) + self.check_basic(loaded, expected_init_count) + basic = loaded.module + + # Check its indirect variants. + + name = f'{self.NAME}_basic_wrapper' + self.add_module_cleanup(name) + expected_init_count += 1 + with self.subTest(name): + loaded = self.load(name) + + self.check_common(loaded) + self.check_indirect(loaded, basic) + self.check_basic(loaded, expected_init_count) + + # Currently PyState_AddModule() always replaces the cached module. + self.assertIs(basic.look_up_self(), loaded.module) + self.assertEqual(basic.initialized_count(), expected_init_count) + + # The cached module shouldn't change after this point. + basic_lookedup = loaded.module + + # Check its direct variant. + + name = f'{self.NAME}_basic_copy' + self.add_module_cleanup(name) + expected_init_count += 1 + with self.subTest(name): + loaded = self.load(name) + + self.check_common(loaded) + self.check_direct(loaded) + self.check_basic(loaded, expected_init_count) + + # This should change the cached module for _testsinglephase. + self.assertIs(basic.look_up_self(), basic_lookedup) + self.assertEqual(basic.initialized_count(), expected_init_count) + + # Check the non-basic variant that has no state. + + name = f'{self.NAME}_with_reinit' + self.add_module_cleanup(name) + with self.subTest(name): + loaded = self.load(name) + + self.check_common(loaded) + self.assertIs(loaded.snapshot.state_initialized, None) + self.check_direct(loaded) + self.check_with_reinit(loaded) + + # This should change the cached module for _testsinglephase. + self.assertIs(basic.look_up_self(), basic_lookedup) + self.assertEqual(basic.initialized_count(), expected_init_count) + + # Check the basic variant that has state. + + name = f'{self.NAME}_with_state' + self.add_module_cleanup(name) + with self.subTest(name): + loaded = self.load(name) + self.addCleanup(loaded.module._clear_module_state) + + self.check_common(loaded) + self.assertIsNot(loaded.snapshot.state_initialized, None) + self.check_direct(loaded) + self.check_with_reinit(loaded) + + # This should change the cached module for _testsinglephase. + self.assertIs(basic.look_up_self(), basic_lookedup) + self.assertEqual(basic.initialized_count(), expected_init_count) + + def test_basic_reloaded(self): + # m_copy is copied into the existing module object. + # Global state is not changed. + self.maxDiff = None + + for name in [ + self.NAME, # the "basic" module + f'{self.NAME}_basic_wrapper', # the indirect variant + f'{self.NAME}_basic_copy', # the direct variant + ]: + self.add_module_cleanup(name) + with self.subTest(name): + loaded = self.load(name) + reloaded = self.re_load(name, loaded.module) + + self.check_common(loaded) + self.check_common(reloaded) + + # Make sure the original __dict__ did not get replaced. + self.assertEqual(id(loaded.module.__dict__), + loaded.snapshot.ns_id) + self.assertEqual(loaded.snapshot.ns.__dict__, + loaded.module.__dict__) + + self.assertEqual(reloaded.module.__spec__.name, reloaded.name) + self.assertEqual(reloaded.module.__name__, + reloaded.snapshot.ns.__name__) + + self.assertIs(reloaded.module, loaded.module) + self.assertIs(reloaded.module.__dict__, loaded.module.__dict__) + # It only happens to be the same but that's good enough here. + # We really just want to verify that the re-loaded attrs + # didn't change. + self.assertIs(reloaded.snapshot.lookedup, + loaded.snapshot.lookedup) + self.assertEqual(reloaded.snapshot.state_initialized, + loaded.snapshot.state_initialized) + self.assertEqual(reloaded.snapshot.init_count, + loaded.snapshot.init_count) + + self.assertIs(reloaded.snapshot.cached, reloaded.module) + + def test_with_reinit_reloaded(self): + # The module's m_init func is run again. + self.maxDiff = None + + # Keep a reference around. + basic = self.load(self.NAME) + + for name, has_state in [ + (f'{self.NAME}_with_reinit', False), # m_size == 0 + (f'{self.NAME}_with_state', True), # m_size > 0 + ]: + self.add_module_cleanup(name) + with self.subTest(name=name, has_state=has_state): + loaded = self.load(name) + if has_state: + self.addCleanup(loaded.module._clear_module_state) + + reloaded = self.re_load(name, loaded.module) + if has_state: + self.addCleanup(reloaded.module._clear_module_state) + + self.check_common(loaded) + self.check_common(reloaded) + + # Make sure the original __dict__ did not get replaced. + self.assertEqual(id(loaded.module.__dict__), + loaded.snapshot.ns_id) + self.assertEqual(loaded.snapshot.ns.__dict__, + loaded.module.__dict__) + + self.assertEqual(reloaded.module.__spec__.name, reloaded.name) + self.assertEqual(reloaded.module.__name__, + reloaded.snapshot.ns.__name__) + + self.assertIsNot(reloaded.module, loaded.module) + self.assertNotEqual(reloaded.module.__dict__, + loaded.module.__dict__) + self.assertIs(reloaded.snapshot.lookedup, reloaded.module) + if loaded.snapshot.state_initialized is None: + self.assertIs(reloaded.snapshot.state_initialized, None) + else: + self.assertGreater(reloaded.snapshot.state_initialized, + loaded.snapshot.state_initialized) + + self.assertIs(reloaded.snapshot.cached, reloaded.module) + + @unittest.skipIf(_testinternalcapi is None, "requires _testinternalcapi") + def test_check_state_first(self): + for variant in ['', '_with_reinit', '_with_state']: + name = f'{self.NAME}{variant}_check_cache_first' + with self.subTest(name): + mod = self._load_dynamic(name, self.ORIGIN) + self.assertEqual(mod.__name__, name) + sys.modules.pop(name, None) + _testinternalcapi.clear_extension(name, self.ORIGIN) + + # Currently, for every single-phrase init module loaded + # in multiple interpreters, those interpreters share a + # PyModuleDef for that object, which can be a problem. + # Also, we test with a single-phase module that has global state, + # which is shared by all interpreters. + + @no_rerun(reason="module state is not cleared (see gh-140657)") + @requires_subinterpreters + def test_basic_multiple_interpreters_main_no_reset(self): + # without resetting; already loaded in main interpreter + + # At this point: + # * alive in 0 interpreters + # * module def may or may not be loaded already + # * module def not in _PyRuntime.imports.extensions + # * mod init func has not run yet (since reset, at least) + # * m_copy not set (hasn't been loaded yet or already cleared) + # * module's global state has not been initialized yet + # (or already cleared) + + main_loaded = self.load(self.NAME) + _testsinglephase = main_loaded.module + # Attrs set after loading are not in m_copy. + _testsinglephase.spam = 'spam, spam, spam, spam, eggs, and spam' + + self.check_common(main_loaded) + self.check_fresh(main_loaded) + + interpid1 = self.add_subinterpreter() + interpid2 = self.add_subinterpreter() + + # At this point: + # * alive in 1 interpreter (main) + # * module def in _PyRuntime.imports.extensions + # * mod init func ran for the first time (since reset, at least) + # * m_copy was copied from the main interpreter (was NULL) + # * module's global state was initialized + + # Use an interpreter that gets destroyed right away. + loaded = self.import_in_subinterp() + self.check_common(loaded) + self.check_copied(loaded, main_loaded) + + # At this point: + # * alive in 1 interpreter (main) + # * module def still in _PyRuntime.imports.extensions + # * mod init func ran again + # * m_copy is NULL (cleared when the interpreter was destroyed) + # (was from main interpreter) + # * module's global state was updated, not reset + + # Use a subinterpreter that sticks around. + loaded = self.import_in_subinterp(interpid1) + self.check_common(loaded) + self.check_copied(loaded, main_loaded) + + # At this point: + # * alive in 2 interpreters (main, interp1) + # * module def still in _PyRuntime.imports.extensions + # * mod init func ran again + # * m_copy was copied from interp1 + # * module's global state was updated, not reset + + # Use a subinterpreter while the previous one is still alive. + loaded = self.import_in_subinterp(interpid2) + self.check_common(loaded) + self.check_copied(loaded, main_loaded) + + # At this point: + # * alive in 3 interpreters (main, interp1, interp2) + # * module def still in _PyRuntime.imports.extensions + # * mod init func ran again + # * m_copy was copied from interp2 (was from interp1) + # * module's global state was updated, not reset + + @no_rerun(reason="rerun not possible; module state is never cleared (see gh-102251)") + @requires_subinterpreters + def test_basic_multiple_interpreters_deleted_no_reset(self): + # without resetting; already loaded in a deleted interpreter + + if Py_TRACE_REFS: + # It's a Py_TRACE_REFS build. + # This test breaks interpreter isolation a little, + # which causes problems on Py_TRACE_REF builds. + raise unittest.SkipTest('crashes on Py_TRACE_REFS builds') + + # At this point: + # * alive in 0 interpreters + # * module def may or may not be loaded already + # * module def not in _PyRuntime.imports.extensions + # * mod init func has not run yet (since reset, at least) + # * m_copy not set (hasn't been loaded yet or already cleared) + # * module's global state has not been initialized yet + # (or already cleared) + + interpid1 = self.add_subinterpreter() + interpid2 = self.add_subinterpreter() + + # First, load in the main interpreter but then completely clear it. + loaded_main = self.load(self.NAME) + loaded_main.module._clear_globals() + _testinternalcapi.clear_extension(self.NAME, self.ORIGIN) + + # At this point: + # * alive in 0 interpreters + # * module def loaded already + # * module def was in _PyRuntime.imports.extensions, but cleared + # * mod init func ran for the first time (since reset, at least) + # * m_copy was set, but cleared (was NULL) + # * module's global state was initialized but cleared + + # Start with an interpreter that gets destroyed right away. + base = self.import_in_subinterp( + postscript=''' + # Attrs set after loading are not in m_copy. + mod.spam = 'spam, spam, mash, spam, eggs, and spam' + ''') + self.check_common(base) + self.check_fresh(base) + + # At this point: + # * alive in 0 interpreters + # * module def in _PyRuntime.imports.extensions + # * mod init func ran for the first time (since reset) + # * m_copy is still set (owned by main interpreter) + # * module's global state was initialized, not reset + + # Use a subinterpreter that sticks around. + loaded_interp1 = self.import_in_subinterp(interpid1) + self.check_common(loaded_interp1) + self.check_copied(loaded_interp1, base) + + # At this point: + # * alive in 1 interpreter (interp1) + # * module def still in _PyRuntime.imports.extensions + # * mod init func did not run again + # * m_copy was not changed + # * module's global state was not touched + + # Use a subinterpreter while the previous one is still alive. + loaded_interp2 = self.import_in_subinterp(interpid2) + self.check_common(loaded_interp2) + self.check_copied(loaded_interp2, loaded_interp1) + + # At this point: + # * alive in 2 interpreters (interp1, interp2) + # * module def still in _PyRuntime.imports.extensions + # * mod init func did not run again + # * m_copy was not changed + # * module's global state was not touched + + @requires_subinterpreters + def test_basic_multiple_interpreters_reset_each(self): + # resetting between each interpreter + + # At this point: + # * alive in 0 interpreters + # * module def may or may not be loaded already + # * module def not in _PyRuntime.imports.extensions + # * mod init func has not run yet (since reset, at least) + # * m_copy not set (hasn't been loaded yet or already cleared) + # * module's global state has not been initialized yet + # (or already cleared) + + interpid1 = self.add_subinterpreter() + interpid2 = self.add_subinterpreter() + + # Use an interpreter that gets destroyed right away. + loaded = self.import_in_subinterp( + postscript=''' + # Attrs set after loading are not in m_copy. + mod.spam = 'spam, spam, mash, spam, eggs, and spam' + ''', + postcleanup=True, + ) + self.check_common(loaded) + self.check_fresh(loaded) + + # At this point: + # * alive in 0 interpreters + # * module def in _PyRuntime.imports.extensions + # * mod init func ran for the first time (since reset, at least) + # * m_copy is NULL (cleared when the interpreter was destroyed) + # * module's global state was initialized, not reset + + # Use a subinterpreter that sticks around. + loaded = self.import_in_subinterp(interpid1, postcleanup=True) + self.check_common(loaded) + self.check_fresh(loaded) + + # At this point: + # * alive in 1 interpreter (interp1) + # * module def still in _PyRuntime.imports.extensions + # * mod init func ran again + # * m_copy was copied from interp1 (was NULL) + # * module's global state was initialized, not reset + + # Use a subinterpreter while the previous one is still alive. + loaded = self.import_in_subinterp(interpid2, postcleanup=True) + self.check_common(loaded) + self.check_fresh(loaded) + + # At this point: + # * alive in 2 interpreters (interp2, interp2) + # * module def still in _PyRuntime.imports.extensions + # * mod init func ran again + # * m_copy was copied from interp2 (was from interp1) + # * module's global state was initialized, not reset + + +@cpython_only +class TestMagicNumber(unittest.TestCase): + def test_magic_number_endianness(self): + magic_number_bytes = _imp.pyc_magic_number_token.to_bytes(4, 'little') + self.assertEqual(magic_number_bytes[2:], b'\r\n') + # Starting with Python 3.11, Python 3.n starts with magic number 2900+50n. + magic_number = int.from_bytes(magic_number_bytes[:2], 'little') + start = 2900 + sys.version_info.minor * 50 + self.assertIn(magic_number, range(start, start + 50)) + + +if __name__ == '__main__': + # Test needs to be a package, so we can do relative imports. + unittest.main() diff --git a/stdlib/test/test_import/__main__.py b/stdlib/test/test_import/__main__.py new file mode 100644 index 00000000..24f02a17 --- /dev/null +++ b/stdlib/test/test_import/__main__.py @@ -0,0 +1,3 @@ +import unittest + +unittest.main('test.test_import') diff --git a/stdlib/test/test_import/data/circular_imports/basic.py b/stdlib/test/test_import/data/circular_imports/basic.py new file mode 100644 index 00000000..3e41e395 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/basic.py @@ -0,0 +1,2 @@ +"""Circular imports through direct, relative imports.""" +from . import basic2 diff --git a/stdlib/test/test_import/data/circular_imports/basic2.py b/stdlib/test/test_import/data/circular_imports/basic2.py new file mode 100644 index 00000000..00bd2f29 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/basic2.py @@ -0,0 +1 @@ +from . import basic diff --git a/stdlib/test/test_import/data/circular_imports/binding.py b/stdlib/test/test_import/data/circular_imports/binding.py new file mode 100644 index 00000000..1fbf929a --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/binding.py @@ -0,0 +1 @@ +import test.test_import.data.circular_imports.binding2 as binding2 diff --git a/stdlib/test/test_import/data/circular_imports/binding2.py b/stdlib/test/test_import/data/circular_imports/binding2.py new file mode 100644 index 00000000..3d669376 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/binding2.py @@ -0,0 +1 @@ +import test.test_import.data.circular_imports.binding as binding diff --git a/stdlib/test/test_import/data/circular_imports/from_cycle1.py b/stdlib/test/test_import/data/circular_imports/from_cycle1.py new file mode 100644 index 00000000..aacfd5f4 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/from_cycle1.py @@ -0,0 +1,2 @@ +from .from_cycle2 import a +b = 1 diff --git a/stdlib/test/test_import/data/circular_imports/from_cycle2.py b/stdlib/test/test_import/data/circular_imports/from_cycle2.py new file mode 100644 index 00000000..62a66e1c --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/from_cycle2.py @@ -0,0 +1,2 @@ +from .from_cycle1 import b +a = 1 diff --git a/stdlib/test/test_import/data/circular_imports/import_cycle.py b/stdlib/test/test_import/data/circular_imports/import_cycle.py new file mode 100644 index 00000000..cd9507b5 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/import_cycle.py @@ -0,0 +1,3 @@ +import test.test_import.data.circular_imports.import_cycle as m + +m.some_attribute diff --git a/stdlib/test/test_import/data/circular_imports/indirect.py b/stdlib/test/test_import/data/circular_imports/indirect.py new file mode 100644 index 00000000..6925788d --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/indirect.py @@ -0,0 +1 @@ +from . import basic, basic2 diff --git a/stdlib/test/test_import/data/circular_imports/rebinding.py b/stdlib/test/test_import/data/circular_imports/rebinding.py new file mode 100644 index 00000000..2b773755 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/rebinding.py @@ -0,0 +1,3 @@ +"""Test the binding of names when a circular import shares the same name as an +attribute.""" +from .rebinding2 import util diff --git a/stdlib/test/test_import/data/circular_imports/rebinding2.py b/stdlib/test/test_import/data/circular_imports/rebinding2.py new file mode 100644 index 00000000..57a9e694 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/rebinding2.py @@ -0,0 +1,3 @@ +from .subpkg import util +from . import rebinding +util = util.util diff --git a/stdlib/test/test_import/data/circular_imports/singlephase.py b/stdlib/test/test_import/data/circular_imports/singlephase.py new file mode 100644 index 00000000..05618bc7 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/singlephase.py @@ -0,0 +1,13 @@ +"""Circular import involving a single-phase-init extension. + +This module is imported from the _testsinglephase_circular module from +_testsinglephase, and imports that module again. +""" + +import importlib +import _testsinglephase +from test.test_import import import_extension_from_file + +name = '_testsinglephase_circular' +filename = _testsinglephase.__file__ +mod = import_extension_from_file(name, filename) diff --git a/stdlib/test/test_import/data/circular_imports/source.py b/stdlib/test/test_import/data/circular_imports/source.py new file mode 100644 index 00000000..f1040990 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/source.py @@ -0,0 +1,2 @@ +from . import use +spam = 1 diff --git a/stdlib/test/test_import/data/circular_imports/subpackage.py b/stdlib/test/test_import/data/circular_imports/subpackage.py new file mode 100644 index 00000000..7b412f76 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/subpackage.py @@ -0,0 +1,2 @@ +"""Circular import involving a sub-package.""" +from .subpkg import subpackage2 diff --git a/stdlib/test/test_import/data/circular_imports/subpkg/subpackage2.py b/stdlib/test/test_import/data/circular_imports/subpkg/subpackage2.py new file mode 100644 index 00000000..17b893a1 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/subpkg/subpackage2.py @@ -0,0 +1,2 @@ +#from .util import util +from .. import subpackage diff --git a/stdlib/test/test_import/data/circular_imports/subpkg/util.py b/stdlib/test/test_import/data/circular_imports/subpkg/util.py new file mode 100644 index 00000000..343bd843 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/subpkg/util.py @@ -0,0 +1,2 @@ +def util(): + pass diff --git a/stdlib/test/test_import/data/circular_imports/subpkg2/__init__.py b/stdlib/test/test_import/data/circular_imports/subpkg2/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/test/test_import/data/circular_imports/subpkg2/parent/__init__.py b/stdlib/test/test_import/data/circular_imports/subpkg2/parent/__init__.py new file mode 100644 index 00000000..9745f60a --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/subpkg2/parent/__init__.py @@ -0,0 +1 @@ +import test.test_import.data.circular_imports.subpkg2.parent.child diff --git a/stdlib/test/test_import/data/circular_imports/subpkg2/parent/child.py b/stdlib/test/test_import/data/circular_imports/subpkg2/parent/child.py new file mode 100644 index 00000000..1995a373 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/subpkg2/parent/child.py @@ -0,0 +1,3 @@ +import test.test_import.data.circular_imports.subpkg2.parent + +test.test_import.data.circular_imports.subpkg2.parent diff --git a/stdlib/test/test_import/data/circular_imports/use.py b/stdlib/test/test_import/data/circular_imports/use.py new file mode 100644 index 00000000..418f9e26 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/use.py @@ -0,0 +1,2 @@ +from . import source +source.spam diff --git a/stdlib/test/test_import/data/circular_imports/util.py b/stdlib/test/test_import/data/circular_imports/util.py new file mode 100644 index 00000000..343bd843 --- /dev/null +++ b/stdlib/test/test_import/data/circular_imports/util.py @@ -0,0 +1,2 @@ +def util(): + pass diff --git a/stdlib/test/test_import/data/double_const.py b/stdlib/test/test_import/data/double_const.py new file mode 100644 index 00000000..67852aaf --- /dev/null +++ b/stdlib/test/test_import/data/double_const.py @@ -0,0 +1,30 @@ +from test.support import TestFailed + +# A test for SF bug 422177: manifest float constants varied way too much in +# precision depending on whether Python was loading a module for the first +# time, or reloading it from a precompiled .pyc. The "expected" failure +# mode is that when test_import imports this after all .pyc files have been +# erased, it passes, but when test_import imports this from +# double_const.pyc, it fails. This indicates a woeful loss of precision in +# the marshal format for doubles. It's also possible that repr() doesn't +# produce enough digits to get reasonable precision for this box. + +PI = 3.14159265358979324 +TWOPI = 6.28318530717958648 + +PI_str = "3.14159265358979324" +TWOPI_str = "6.28318530717958648" + +# Verify that the double x is within a few bits of eval(x_str). +def check_ok(x, x_str): + assert x > 0.0 + x2 = eval(x_str) + assert x2 > 0.0 + diff = abs(x - x2) + # If diff is no larger than 3 ULP (wrt x2), then diff/8 is no larger + # than 0.375 ULP, so adding diff/8 to x2 should have no effect. + if x2 + (diff / 8.) != x2: + raise TestFailed("Manifest const %s lost too much precision " % x_str) + +check_ok(PI, PI_str) +check_ok(TWOPI, TWOPI_str) diff --git a/stdlib/test/test_import/data/package/__init__.py b/stdlib/test/test_import/data/package/__init__.py new file mode 100644 index 00000000..a4f2bc34 --- /dev/null +++ b/stdlib/test/test_import/data/package/__init__.py @@ -0,0 +1,2 @@ +import package.submodule +package.submodule diff --git a/stdlib/test/test_import/data/package/submodule.py b/stdlib/test/test_import/data/package/submodule.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/test/test_import/data/package2/submodule1.py b/stdlib/test/test_import/data/package2/submodule1.py new file mode 100644 index 00000000..0698ed6d --- /dev/null +++ b/stdlib/test/test_import/data/package2/submodule1.py @@ -0,0 +1,3 @@ +import sys +sys.modules.pop(__package__, None) +from . import submodule2 diff --git a/stdlib/test/test_import/data/package2/submodule2.py b/stdlib/test/test_import/data/package2/submodule2.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/test/test_import/data/package3/__init__.py b/stdlib/test/test_import/data/package3/__init__.py new file mode 100644 index 00000000..7033c22a --- /dev/null +++ b/stdlib/test/test_import/data/package3/__init__.py @@ -0,0 +1,2 @@ +"""Rebinding the package attribute after importing the module.""" +from .submodule import submodule diff --git a/stdlib/test/test_import/data/package3/submodule.py b/stdlib/test/test_import/data/package3/submodule.py new file mode 100644 index 00000000..cd7b30db --- /dev/null +++ b/stdlib/test/test_import/data/package3/submodule.py @@ -0,0 +1,7 @@ +attr = 'submodule' +class A: + attr = 'submodule' +class submodule: + attr = 'rebound' + class B: + attr = 'rebound' diff --git a/stdlib/test/test_import/data/package4/__init__.py b/stdlib/test/test_import/data/package4/__init__.py new file mode 100644 index 00000000..d8af60ab --- /dev/null +++ b/stdlib/test/test_import/data/package4/__init__.py @@ -0,0 +1,5 @@ +"""Binding the package attribute without importing the module.""" +class submodule: + attr = 'origin' + class B: + attr = 'origin' diff --git a/stdlib/test/test_import/data/package4/submodule.py b/stdlib/test/test_import/data/package4/submodule.py new file mode 100644 index 00000000..c861417a --- /dev/null +++ b/stdlib/test/test_import/data/package4/submodule.py @@ -0,0 +1,3 @@ +attr = 'submodule' +class A: + attr = 'submodule' diff --git a/stdlib/test/test_import/data/unwritable/__init__.py b/stdlib/test/test_import/data/unwritable/__init__.py new file mode 100644 index 00000000..da4ddb3d --- /dev/null +++ b/stdlib/test/test_import/data/unwritable/__init__.py @@ -0,0 +1,12 @@ +import sys + +class MyMod(object): + __slots__ = ['__builtins__', '__cached__', '__doc__', + '__file__', '__loader__', '__name__', + '__package__', '__path__', '__spec__'] + def __init__(self): + for attr in self.__slots__: + setattr(self, attr, globals()[attr]) + + +sys.modules[__name__] = MyMod() diff --git a/stdlib/test/test_import/data/unwritable/x.py b/stdlib/test/test_import/data/unwritable/x.py new file mode 100644 index 00000000..e69de29b From 589c0b2936693b5f4cb70f2506c0603a7476f6e7 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:31:19 +0700 Subject: [PATCH 32/84] import: faithful relative-import package resolution Port the parts of _bootstrap that gopy was approximating: - _calc___package__: honor an explicit __package__ verbatim (even empty), fall back to __spec__.parent, then derive from __name__, so parentless relative imports raise instead of silently resolving. - _sanity_check: level>0 with a non-string __package__ now raises TypeError rather than ModuleNotFoundError. - __import__ identity: capture the interpreter's original __import__ at init and compare the frame builtin against it by identity, so a user that rebinds builtins.__import__ takes the custom path. - _find_and_load: re-check sys.modules after importing a parent package. When the parent's __init__ already imported and rebound the child, return the cached module instead of reloading and clobbering the parent's attribute. Running a directory package's __init__.py as the main module now sets __package__/__path__/__name__ so 'from . import x' works. RelativeImportTests is fully green. --- builtins/init.go | 14 +++++++ cmd/gopy/main.go | 54 ++++++++++++++++++++++++++- imp/pathfinder.go | 11 ++++++ stdlib/test/relimport.py | 1 + vm/eval_import.go | 79 ++++++++++++++++++++++++++++++++-------- 5 files changed, 143 insertions(+), 16 deletions(-) create mode 100644 stdlib/test/relimport.py diff --git a/builtins/init.go b/builtins/init.go index 87576b9c..03499768 100644 --- a/builtins/init.go +++ b/builtins/init.go @@ -23,6 +23,13 @@ import ( var wireOnce sync.Once +// DefaultImport holds the interpreter's original __import__ builtin so the +// IMPORT_NAME fast path can recognize it by identity even after user code +// rebinds builtins.__import__. +// +// CPython: pycore_interp.h interp->imports.import_func +var DefaultImport objects.Object + // Init constructs the builtins dict and stamps the v0.6 surface into // it: None / True / False / NotImplemented as named constants, and // print as the single callable. defaultFile is the io.Writer the @@ -151,6 +158,13 @@ func Init(defaultFile io.Writer) (*objects.Dict, error) { if err := setBuiltin(dict, "__import__", importFn); err != nil { return nil, err } + // Capture the interpreter's original __import__ so the IMPORT_NAME fast + // path can compare against it by identity. Re-reading the builtins + // module is wrong: a test that swaps builtins.__import__ would make the + // swapped callable compare equal to "the default" and never get called. + // + // CPython: pycore_interp.h interp->imports.import_func (captured at init) + DefaultImport = importFn // breakpoint() forwards to sys.breakpointhook. Register the builtin // here and hand the default hook to sys so sys.breakpointhook and diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 2058c7a4..2cb02f5b 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -585,6 +585,23 @@ func runFile(path string, stdout, stderr *os.File) int { installPathFinder(path) modName := mainModuleName(path) mainGlobals := newMainGlobals(g, modName) + // Anchor relative imports inside a vendored test package. CPython's + // import machinery stamps __package__ when it loads the module; a + // synthesized main module would otherwise have no anchor and any + // `from . import x` inside it would raise "no known parent package". + // + // CPython: Lib/importlib/_bootstrap.py:1350 _calc___package__ + if pkg := mainPackageName(path, modName); pkg != "" { + _ = mainGlobals.SetItem(objects.NewStr("__package__"), objects.NewStr(pkg)) + // A package's __init__ also carries __path__ pointing at its dir, + // so submodule imports (`from .data import x`) find sibling files. + if filepath.Base(path) == "__init__.py" { + if abs, absErr := filepath.Abs(filepath.Dir(path)); absErr == nil { + _ = mainGlobals.SetItem(objects.NewStr("__path__"), + objects.NewList([]objects.Object{objects.NewStr(abs)})) + } + } + } ts := state.NewThread() if rc := bootstrapEncodings(ts, mainGlobals, stderr); rc != 0 { return rc @@ -647,7 +664,12 @@ func runFile(path string, stdout, stderr *os.File) int { // CPython: Lib/test/libregrtest/runtest.py unittest.main func unittestRunnerSuffix(path string) (string, bool) { base := filepath.Base(path) - if !strings.HasPrefix(base, "test_") || !strings.HasSuffix(base, ".py") { + // A package test is laid out as test_xxx/__init__.py; accept it too so + // the runner fires even though its basename is not test_*.py. The + // module runs under "test.test_xxx" (not "__main__"), so its own + // `if __name__ == '__main__'` guard never triggers the suite. + isPkgInit := base == "__init__.py" && strings.HasPrefix(filepath.Base(filepath.Dir(path)), "test_") + if !isPkgInit && (!strings.HasPrefix(base, "test_") || !strings.HasSuffix(base, ".py")) { return "", false } src, err := os.ReadFile(path) //nolint:gosec // reading a caller-supplied test file path is the entire contract @@ -681,12 +703,42 @@ func unittestRunnerSuffix(path string) (string, bool) { // CPython: Lib/test/libregrtest/runtest.py (imports test.) func mainModuleName(path string) string { base := filepath.Base(path) + // A package laid out as test_xxx/__init__.py runs under the dotted + // name "test.test_xxx": regrtest imports the directory as a package, so + // the __init__ body sees __name__ == "test.test_xxx" and relative + // imports inside it resolve against that anchor. + if base == "__init__.py" { + parent := filepath.Base(filepath.Dir(path)) + if strings.HasPrefix(parent, "test_") { + return "test." + parent + } + return "__main__" + } if strings.HasPrefix(base, "test_") && strings.HasSuffix(base, ".py") { return "test." + strings.TrimSuffix(base, ".py") } return "__main__" } +// mainPackageName returns the __package__ anchor for the main module at +// path. A package __init__ anchors at its own dotted name; a plain module +// anchors at its parent package. Relative imports inside the file resolve +// against this value. +// +// CPython: Lib/importlib/_bootstrap.py:1350 _calc___package__ +func mainPackageName(path, modName string) string { + if modName == "__main__" { + return "" + } + if filepath.Base(path) == "__init__.py" { + return modName + } + if dot := strings.LastIndex(modName, "."); dot >= 0 { + return modName[:dot] + } + return "" +} + // runInteractive is the gopy bare-invocation entry: print the banner // and hand control to pythonrun.InteractiveLoop. Mirrors // pymain_run_stdin. diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 9471c811..54bdc2f2 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -111,6 +111,17 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er } parentMod = pm } + // Importing the parent package may have imported this child as a side + // effect (e.g. the parent's __init__ ran `from .child import ...`), + // caching it in sys.modules and possibly rebinding the parent's + // attribute to something other than the submodule. In that case CPython + // returns the already-cached child and never reloads or re-binds it, so + // the parent's rebinding survives. + // + // CPython: Lib/importlib/_bootstrap.py:1290 _find_and_load_unlocked + if cached, ok := GetModule(name); ok { + return cached, nil + } paths, err := readPackagePath(parentMod) if err != nil { return nil, err diff --git a/stdlib/test/relimport.py b/stdlib/test/relimport.py new file mode 100644 index 00000000..50aa497f --- /dev/null +++ b/stdlib/test/relimport.py @@ -0,0 +1 @@ +from .test_import import * diff --git a/vm/eval_import.go b/vm/eval_import.go index 7dcb2274..ead812c9 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -13,6 +13,7 @@ import ( "fmt" "strings" + "github.com/tamnd/gopy/builtins" "github.com/tamnd/gopy/compile" pyerrors "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/frame" @@ -58,15 +59,7 @@ func optionalImportFunc(builtins objects.Object) (objects.Object, bool, error) { // // CPython: Python/ceval.c:2820 import_name (fast-path identity check) func isDefaultImport(fn objects.Object) bool { - bm, ok := imp.GetModule("builtins") - if !ok || bm == nil { - return false - } - def, err := bm.Dict().GetItem(objects.NewStr("__import__")) - if err != nil || def == nil { - return false - } - return fn == def + return builtins.DefaultImport != nil && fn == builtins.DefaultImport } // frameHasExplicitBuiltins reports whether the frame's globals carry an @@ -196,6 +189,16 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo } level := importLevel(levelObj) + // A relative import requires __package__ to be a string. CPython's + // _sanity_check raises TypeError before any resolution when level>0 + // and __package__ is set to a non-string (e.g. an object()). + // + // CPython: Lib/importlib/_bootstrap.py:1390 _sanity_check + if level > 0 { + if terr := checkPackageType(e.f.Globals); terr != nil { + return 0, true, terr + } + } pkgname := globalName(e.f.Globals) exec := &vmExecutor{ts: e.ts, builtins: builtinsNS} @@ -410,6 +413,27 @@ func importLevel(obj objects.Object) int { // module path while __package__ correctly points at the parent. // // CPython: Python/import.c:1665 import_name (read __package__ first) +// checkPackageType returns a TypeError when globals carries a __package__ +// that is set (not None) but is not a string. A relative import with such a +// package is rejected before resolution. +// +// CPython: Lib/importlib/_bootstrap.py:1390 _sanity_check ("__package__ not +// set to a string") +func checkPackageType(globals objects.Object) error { + d, ok := globals.(*objects.Dict) + if !ok { + return nil + } + v, err := d.GetItem(objects.NewStr("__package__")) + if err != nil || v == nil || objects.IsNone(v) { + return nil + } + if _, isStr := v.(*objects.Unicode); !isStr { + return fmt.Errorf("TypeError: __package__ not set to a string") + } + return nil +} + func globalName(globals objects.Object) string { if globals == nil { return "" @@ -418,20 +442,45 @@ func globalName(globals objects.Object) string { if !ok { return "" } + // __package__ takes precedence and is returned verbatim, even when it + // is the empty string: an empty package with a relative import is + // exactly the "no known parent package" case resolveAbsName rejects. + // Only a missing or None __package__ falls through to derivation. + // + // CPython: Lib/importlib/_bootstrap.py:1350 _calc___package__ if v, err := d.GetItem(objects.NewStr("__package__")); err == nil && v != nil && !objects.IsNone(v) { - if s, serr := objects.Str(v); serr == nil && s != "" { + if s, serr := objects.Str(v); serr == nil { return s } } + // __spec__.parent is the next anchor when no explicit __package__ is set. + // + // CPython: Lib/importlib/_bootstrap.py:1358 _calc___package__ (spec.parent) + if v, err := d.GetItem(objects.NewStr("__spec__")); err == nil && v != nil && !objects.IsNone(v) { + if parent, perr := objects.GetAttr(v, objects.NewStr("parent")); perr == nil && parent != nil && !objects.IsNone(parent) { + if s, serr := objects.Str(parent); serr == nil { + return s + } + } + } + // Fall back to __name__. A package (one carrying __path__) anchors at + // its own name; a plain module strips its final dotted component. For + // __main__ this yields "" so a relative import raises. + // + // CPython: Lib/importlib/_bootstrap.py:1362 _calc___package__ (rpartition) v, err := d.GetItem(objects.NewStr("__name__")) if err != nil || v == nil { return "" } - if tp := v.Type(); tp.Str != nil { - s, serr := tp.Str(v) - if serr == nil { - return s - } + s, serr := objects.Str(v) + if serr != nil { + return "" + } + if hp, herr := d.GetItem(objects.NewStr("__path__")); herr == nil && hp != nil { + return s + } + if dot := strings.LastIndex(s, "."); dot >= 0 { + return s[:dot] } return "" } From 28d64eee8a0306e2b44f84336554f10deb973f6f Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:38:28 +0700 Subject: [PATCH 33/84] import: keep the failing module's frame in import tracebacks When a module body raised while being imported, the import opcode was re-synthesizing a fresh ModuleNotFoundError, throwing away the real exception the body had already raised (and the frame its traceback pointed at). A nested 'import missing' inside a module now keeps that module's frame, and a package whose __init__ raises propagates the real exception instead of a generic 'No module named pkg.child'. Tag body-execution failures with a sentinel so the import opcode can tell a genuine lookup miss (synthesize ModuleNotFoundError) apart from a located module that blew up while running (propagate as-is). --- imp/import.go | 8 ++++++++ imp/pathfinder.go | 21 ++++++++++++++++----- vm/eval_import.go | 11 ++++++++++- 3 files changed, 34 insertions(+), 6 deletions(-) diff --git a/imp/import.go b/imp/import.go index 92b75f20..ade33c0c 100644 --- a/imp/import.go +++ b/imp/import.go @@ -18,6 +18,14 @@ import ( // ErrModuleNotFound is returned when no finder can locate the named module. var ErrModuleNotFound = fmt.Errorf("imp: ModuleNotFoundError") +// ErrModuleExecFailed tags a load failure that happened while executing a +// located module's body (rather than failing to locate it). The real Python +// exception is already live on the thread state with its own traceback, so +// the import opcode must propagate it instead of synthesizing a fresh +// ModuleNotFoundError. A nested `import missing` inside the body wraps +// ErrModuleNotFound, so callers check this sentinel first. +var ErrModuleExecFailed = fmt.Errorf("imp: module body raised") + // ImportModule performs an absolute import of name. It is the // zero-level convenience wrapper around ImportModuleLevel. // diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 54bdc2f2..b8cde174 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -19,6 +19,7 @@ package imp import ( + "errors" "fmt" "os" "path/filepath" @@ -107,6 +108,16 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // CPython: Lib/importlib/_bootstrap.py:1227 _find_and_load pm, err := ImportModuleLevel(exec, parent, "", 0) if err != nil { + // A parent that was located but raised while executing its + // __init__ must surface that exception verbatim (CPython + // propagates it from _find_and_load), so do not relabel it + // as a finder miss. Only a genuine parent-not-found is a + // miss the child lookup can recover from. + // + // CPython: Lib/importlib/_bootstrap.py:1227 _find_and_load + if errors.Is(err, ErrModuleExecFailed) || !errors.Is(err, ErrModuleNotFound) { + return nil, err + } return nil, fmt.Errorf("%w: parent package %q: %w", errFinderMiss, parent, err) } parentMod = pm @@ -401,7 +412,7 @@ func loadFromSpec(exec Executor, name string, spec objects.Object) (*objects.Mod } if _, err := objects.Call(execMod, objects.NewTuple([]objects.Object{module}), nil); err != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadFromSpec %q: exec_module: %w", name, err) + return nil, fmt.Errorf("imp: loadFromSpec %q: exec_module: %w: %w", name, err, ErrModuleExecFailed) } // exec_module may reassign sys.modules[name]; re-read it the way // CPython's _load_unlocked returns sys.modules[spec.name]. @@ -534,7 +545,7 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam setSpecInitializing(mod, false) if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsPackage %q: exec: %w", name, execErr) + return nil, fmt.Errorf("imp: loadAsPackage %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so an `__init__.py` that reassigns its own entry @@ -579,7 +590,7 @@ func loadAsPackageBytecode(exec Executor, initFile, pkgDir, name string) (*objec setSpecInitializing(mod, false) if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: exec: %w", name, execErr) + return nil, fmt.Errorf("imp: loadAsPackageBytecode %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } if final, ok := GetModule(name); ok { return final, nil @@ -614,7 +625,7 @@ func loadAsModuleBytecode(exec Executor, file, name, parent string) (*objects.Mo setSpecInitializing(mod, false) if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: exec: %w", name, execErr) + return nil, fmt.Errorf("imp: loadAsModuleBytecode %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } if final, ok := GetModule(name); ok { return final, nil @@ -706,7 +717,7 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str setSpecInitializing(mod, false) if execErr != nil { RemoveModule(name) - return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w", name, execErr) + return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so a module body that reassigns its own entry diff --git a/vm/eval_import.go b/vm/eval_import.go index ead812c9..6523f7df 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -211,7 +211,16 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo // the import-machinery contract. // // CPython: Python/import.c:1759 import_name (sets ImportError) - if errors.Is(ierr, imp.ErrModuleNotFound) { + // + // A failure raised while executing the module body (the imported + // module itself ran a failing `import`, etc.) already left the + // real exception on the thread state with its own traceback, so + // re-synthesizing here would discard it and the inner frame it + // points at. Only synthesize for a genuine lookup miss. + // + // CPython: Python/import.c:1759 import_name only sets the error + // when PyImport_ImportModuleLevelObject returns NULL without one. + if errors.Is(ierr, imp.ErrModuleNotFound) && !errors.Is(ierr, imp.ErrModuleExecFailed) { pyerrors.SetModuleNotFound(e.ts, modname) } return 0, true, ierr From a97a3ca2b043cdfe3ead49924fb80ca22ef138a8 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:40:13 +0700 Subject: [PATCH 34/84] import: publish _frozen_importlib aliases for the bootstrap modules CPython's frozen bootstrap exposes importlib._bootstrap and _bootstrap_external under the _frozen_importlib / _frozen_importlib_external names, pointing at the very same module objects. gopy loads the bootstrap as ordinary .py files, so nothing populated those aliases and code that reaches for sys.modules['_frozen_importlib'] hit a KeyError. Re-publish the loaded objects under the frozen names during bootstrap so the two views stay identical. --- cmd/gopy/main.go | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 2cb02f5b..372c2581 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -353,6 +353,16 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File "from importlib import _bootstrap, _bootstrap_external\n" + "_bootstrap._install(sys, _imp)\n" + "_bootstrap_external._install(_bootstrap)\n" + + // CPython's C bootstrap freezes _bootstrap / _bootstrap_external and + // publishes them under the _frozen_importlib* names; importlib then + // aliases those exact objects to importlib._bootstrap[_external]. gopy + // loads them as plain .py modules, so re-publish the same objects + // under the frozen names to keep sys.modules['_frozen_importlib'] and + // importlib._bootstrap identical (issue #15386 / bootstrap tests). + // + // CPython: Lib/importlib/__init__.py:50 (_bootstrap aliasing) + "sys.modules['_frozen_importlib'] = _bootstrap\n" + + "sys.modules['_frozen_importlib_external'] = _bootstrap_external\n" + // CPython registers the zipimporter path hook ahead of FileFinder // (C-side, _PyImportZip_Init) so a sys.path entry pointing at a zip // archive is claimed before the directory finder rejects it. From 924ef421ce6b95f3fbc8d7da1e25e28e54084a23 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 04:50:15 +0700 Subject: [PATCH 35/84] import: emit ImportWarning when a child cannot bind onto an unwritable parent bindOnParent now runs the real setattr(parent_module, child, module) so a parent with a custom __setattr__ (or one a package swapped into sys.modules) participates, and an AttributeError is reported as an ImportWarning the same way _find_and_load_unlocked does. The bound value is re-read from sys.modules by full name so an __init__ that reassigns its own entry to a non-module object is bound in that swapped form. --- imp/import.go | 9 +++++++ imp/pathfinder.go | 56 ++++++++++++++++++++++++++++++++++++--- module/_warnings/lexer.go | 7 ++++- 3 files changed, 67 insertions(+), 5 deletions(-) diff --git a/imp/import.go b/imp/import.go index ade33c0c..c2a31c22 100644 --- a/imp/import.go +++ b/imp/import.go @@ -18,6 +18,15 @@ import ( // ErrModuleNotFound is returned when no finder can locate the named module. var ErrModuleNotFound = fmt.Errorf("imp: ModuleNotFoundError") +// ImportWarnHook routes an ImportWarning through the live _warnings +// machinery so it walks the filter list and any recording context +// manager (catch_warnings / assertWarns). It is nil until module +// _warnings wires it during init; the imp package cannot import +// _warnings directly because _warnings imports imp. +// +// CPython: Lib/importlib/_bootstrap.py:1353 _warnings.warn(msg, ImportWarning) +var ImportWarnHook func(message string) error + // ErrModuleExecFailed tags a load failure that happened while executing a // located module's body (rather than failing to locate it). The real Python // exception is already live on the thread state with its own traceback, so diff --git a/imp/pathfinder.go b/imp/pathfinder.go index b8cde174..86e9b9ec 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -27,6 +27,7 @@ import ( "strings" "sync" + pyerrors "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/marshal" "github.com/tamnd/gopy/objects" ) @@ -428,16 +429,63 @@ func loadFromSpec(exec Executor, name string, spec objects.Object) (*objects.Mod // resolve as an attribute on `a`. Errors are swallowed to match // CPython, which also catches AttributeError around the setattr. // -// CPython: Lib/importlib/_bootstrap.py:1234 setattr(parent_module, child, module) +// CPython: Lib/importlib/_bootstrap.py:1350 setattr(parent_module, child, module) func bindOnParent(parent, tail string, child *objects.Module) { if parent == "" { return } - pm, ok := GetModule(parent) - if !ok { + // CPython reads parent_module = sys.modules[parent] verbatim, so a test + // (or pathological code) that swaps in a non-module object still receives + // the setattr; GetModuleRaw preserves that object, GetModule would drop it. + pm, ok := GetModuleRaw(parent) + if !ok || objects.IsNone(pm) { return } - _ = pm.Dict().SetItem(objects.NewStr(tail), child) + // CPython binds `module = sys.modules.pop(spec.name)`, i.e. the object the + // body left in sys.modules, not the module shell the loader created. An + // __init__ that reassigns sys.modules[__name__] to a custom object is bound + // in that swapped form, so re-read the entry by full name and fall back to + // the loader's module only when nothing replaced it. + // + // CPython: Lib/importlib/_bootstrap.py:931 module = sys.modules.pop(spec.name) + bound := objects.Object(child) + if raw, present := GetModuleRaw(parent + "." + tail); present && !objects.IsNone(raw) { + bound = raw + } + // setattr(parent_module, child, module) runs the parent's real __setattr__ + // so a custom or unwritable parent participates. An AttributeError is + // caught and reported as an ImportWarning, exactly as + // _find_and_load_unlocked does. + // + // CPython: Lib/importlib/_bootstrap.py:1350 try: setattr(...) except AttributeError + if err := objects.SetAttr(pm, objects.NewStr(tail), bound); err != nil { + if isAttributeError(err) && ImportWarnHook != nil { + // CPython: Lib/importlib/_bootstrap.py:1352 msg = f"Cannot set ..." + msg := fmt.Sprintf("Cannot set an attribute on '%s' for child module '%s'", + parent, tail) + _ = ImportWarnHook(msg) + } + } +} + +// isAttributeError reports whether a Go error raised by SetAttr carries a +// Python AttributeError. SetAttr surfaces the exception wrapped in a +// RaisedError; an entry that is not an AttributeError propagates as a +// non-match so it is not silently turned into a warning. +func isAttributeError(err error) bool { + var re *objects.RaisedError + if errors.As(err, &re) { + if exc, ok := re.Exc.(*pyerrors.Exception); ok { + return pyerrors.Match(exc, pyerrors.PyExc_AttributeError) + } + } + // SetAttr also surfaces a missing-slot failure as a plain Go error whose + // text leads with the exception name, so match that shape too. + msg := err.Error() + if rest, ok := strings.CutPrefix(msg, "vm: "); ok { + msg = rest + } + return strings.HasPrefix(msg, "AttributeError:") } // splitParent splits a dotted module name into (parent, tail). diff --git a/module/_warnings/lexer.go b/module/_warnings/lexer.go index 17afdec0..d08f8df8 100644 --- a/module/_warnings/lexer.go +++ b/module/_warnings/lexer.go @@ -5,9 +5,10 @@ import ( "github.com/tamnd/gopy/compile" "github.com/tamnd/gopy/errors" + "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/objects" - "github.com/tamnd/gopy/parser/lexer" parsererrors "github.com/tamnd/gopy/parser/errors" + "github.com/tamnd/gopy/parser/lexer" ) // init wires the package-level hooks in parser/lexer and compile so @@ -30,6 +31,10 @@ func init() { // CPython: Objects/typeobject.c:4667 PyErr_WarnFormat(..., 1, ...) return WarnUnicode(errors.PyExc_RuntimeWarning, msg, 1, nil) } + imp.ImportWarnHook = func(msg string) error { + // CPython: Lib/importlib/_bootstrap.py:1353 _warnings.warn(msg, ImportWarning) + return WarnUnicode(errors.PyExc_ImportWarning, msg, 1, nil) + } } // FlushLexerWarnings posts every SyntaxWarning-class diagnostic the From 890aacbbd66f190f52d5be1b4178a73c6f3bb0c8 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 12:03:52 +0700 Subject: [PATCH 36/84] import: bind vendored test package onto its parent so circular-submodule expressions resolve --- cmd/gopy/main.go | 17 +++++++++++++++-- imp/pathfinder.go | 41 +++++++++++++++++++++++++++++++++++++++++ imp/shadowing.go | 36 ++++++++++++++++++++++++++++++++++-- 3 files changed, 90 insertions(+), 4 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 372c2581..4f74416b 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -634,12 +634,25 @@ func runFile(path string, stdout, stderr *os.File) int { if absErr != nil { abs = path } - src := fmt.Sprintf("import importlib.util as _u, sys as _s\n"+ + // regrtest imports the test under "test." the normal way, so + // the import machinery runs setattr(parent_package, child, module): + // the `test` package ends up with a `test_import` attribute. gopy + // pre-injects the gate module into sys.modules without that parent + // binding, so a test like data/circular_imports/.../child.py that + // evaluates `test.test_import.<...>` as an expression would fail its + // first hop getattr(test, 'test_import'). Import the parent package + // and bind the leaf to mirror what _find_and_load does. + // + // CPython: Lib/importlib/_bootstrap.py:1350 setattr(parent_module, child, module) + src := fmt.Sprintf("import importlib, importlib.util as _u, sys as _s\n"+ "_m = _s.modules.get(%q)\n"+ "if _m is not None and getattr(_m, '__spec__', None) is None:\n"+ " _m.__spec__ = _u.spec_from_file_location(%q, %q)\n"+ " _m.__loader__ = _m.__spec__.loader\n"+ - "del _u, _s, _m\n", modName, modName, abs) + "_parent, _, _child = %q.rpartition('.')\n"+ + "if _m is not None and _parent:\n"+ + " setattr(importlib.import_module(_parent), _child, _m)\n"+ + "del importlib, _u, _s, _m, _parent, _child\n", modName, modName, abs, modName) if _, err := pythonrun.RunString(ts, src, "", parser.ModeFile, mainGlobals, nil); err != nil { fmt.Fprintln(stderr, "attach main spec:", err) } diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 86e9b9ec..e4264152 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -139,6 +139,14 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er return nil, err } search = paths + + // Track this child on the parent spec for the duration of the load so a + // circular import that does getattr(parent, tail) before tail finishes + // loading gets the "cannot access submodule" diagnostic. + // + // CPython: Lib/importlib/_bootstrap.py:1340 parent_spec._uninitialized_submodules.append(child) + pop := pushUninitializedSubmodule(parentMod, tail) + defer pop() } // PEP 420: a directory matching the tail with no __init__.py and no @@ -828,6 +836,39 @@ func setSpecInitializing(mod *objects.Module, on bool) { _ = objects.SetAttr(spec, objects.NewStr("_initializing"), v) } +// pushUninitializedSubmodule appends child to parentMod.__spec__. +// _uninitialized_submodules and returns a pop function that removes the +// last entry. CPython brackets the child's _load_unlocked with this +// append/pop so a circular import that reaches getattr(parent, child) +// while child is mid-load gets the "cannot access submodule" message. +// +// CPython: Lib/importlib/_bootstrap.py:1340 parent_spec._uninitialized_submodules.append(child) +func pushUninitializedSubmodule(parentMod *objects.Module, child string) func() { + noop := func() {} + if parentMod == nil { + return noop + } + spec, err := parentMod.Dict().GetItem(objects.NewStr("__spec__")) + if err != nil || spec == nil || objects.IsNone(spec) { + return noop + } + listObj, err := objects.GetAttr(spec, objects.NewStr("_uninitialized_submodules")) + if err != nil { + return noop + } + list, ok := listObj.(*objects.List) + if !ok { + return noop + } + list.Append(objects.NewStr(child)) + return func() { + // CPython: Lib/importlib/_bootstrap.py:1345 _uninitialized_submodules.pop() + if n := list.Len(); n > 0 { + list.SetSlice(n-1, n, nil) + } + } +} + // attachNamespaceSpec binds a PEP 420 namespace ModuleSpec (loader None, // origin None, submodule_search_locations = the portions) onto mod. Like // the file path it defers when importlib.util is not importable yet. diff --git a/imp/shadowing.go b/imp/shadowing.go index c736dd42..37058341 100644 --- a/imp/shadowing.go +++ b/imp/shadowing.go @@ -61,6 +61,26 @@ func SpecIsInitializing(spec objects.Object) (bool, error) { return objects.IsTrue(v), nil } +// SpecIsUninitializedSubmodule ports _PyModuleSpec_IsUninitializedSubmodule: +// name is currently mid-import as a submodule, i.e. it appears in +// spec._uninitialized_submodules. A missing list reads as "not a submodule". +// +// CPython: Objects/moduleobject.c:876 _PyModuleSpec_IsUninitializedSubmodule +func SpecIsUninitializedSubmodule(spec objects.Object, name string) (bool, error) { + if spec == nil || objects.IsNone(spec) { + return false, nil + } + v, found, err := optionalAttr(spec, "_uninitialized_submodules") + if err != nil || !found { + return false, err + } + contains, err := objects.Contains(v, objects.NewStr(name)) + if err != nil { + return false, err + } + return contains, nil +} + // ModuleIsPossiblyShadowing ports _PyModule_IsPossiblyShadowing: the // module at origin could shadow a same-named module later on the search // path. The check is: not sys.flags.safe_path and @@ -251,9 +271,21 @@ func moduleGetattrError(m *objects.Module, name string) error { case initializing: return fmt.Errorf("AttributeError: partially initialized module %s has no attribute %s (most likely due to a circular import)", modQ, nameQ) - default: - return fmt.Errorf("AttributeError: module %s has no attribute %s", modQ, nameQ) } + + // Not initializing: the miss is a circular import only if the name is a + // submodule currently mid-load (tracked on spec._uninitialized_submodules). + // + // CPython: Objects/moduleobject.c:1116 _PyModuleSpec_IsUninitializedSubmodule + uninit, uerr := SpecIsUninitializedSubmodule(spec, name) + if uerr != nil { + return uerr + } + if uninit { + return fmt.Errorf("AttributeError: cannot access submodule %s of module %s (most likely due to a circular import)", + nameQ, modQ) + } + return fmt.Errorf("AttributeError: module %s has no attribute %s", modQ, nameQ) } // unicodeContents returns the string contents of a str (or str subclass) From 4dc612e9c5002f3939b674de462f17bc52948299 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 12:09:29 +0700 Subject: [PATCH 37/84] sys: make version_info a named struct-sequence with major/minor/micro fields --- module/sys/sys.go | 25 ++++++++++++++++++++----- module/sys/sys_test.go | 5 +++-- 2 files changed, 23 insertions(+), 7 deletions(-) diff --git a/module/sys/sys.go b/module/sys/sys.go index cf9d623f..52ccd642 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -237,13 +237,28 @@ func maxsize() int64 { return 1<<31 - 1 } -// versionInfo returns sys.version_info as a five-tuple -// (major, minor, micro, releaselevel, serial). The struct-sequence -// named-tuple lands with 1651-sys-C; v0.7 uses a plain tuple. +// versionInfoType is the struct-sequence type behind sys.version_info: +// a five-field named tuple (major, minor, micro, releaselevel, serial) +// whose type repr reads sys.version_info(major=3, minor=14, ...). It +// subclasses tuple so isinstance(sys.version_info, tuple) holds and the +// values stay index-addressable, while sys.version_info.minor and the +// other named members resolve through the struct-sequence members. +// +// CPython: Python/sysmodule.c:850 version_info_type / make_version_info +var versionInfoType = objects.NewStructSeqType("sys.version_info", []objects.StructSeqField{ + {Name: "major", Doc: "Major release number"}, + {Name: "minor", Doc: "Minor release number"}, + {Name: "micro", Doc: "Patch release number"}, + {Name: "releaselevel", Doc: "'alpha', 'beta', 'candidate', or 'final'"}, + {Name: "serial", Doc: "Serial release number"}, +}) + +// versionInfo returns sys.version_info as the named struct-sequence +// (major, minor, micro, releaselevel, serial). // // CPython: Python/sysmodule.c:3884 make_version_info -func versionInfo() *objects.Tuple { - return objects.NewTuple([]objects.Object{ +func versionInfo() *objects.StructSeq { + return objects.NewStructSeq(versionInfoType, []objects.Object{ objects.NewInt(int64(build.PythonMajorVersion)), objects.NewInt(int64(build.PythonMinorVersion)), objects.NewInt(0), diff --git a/module/sys/sys_test.go b/module/sys/sys_test.go index f44fbe1d..b4f826f9 100644 --- a/module/sys/sys_test.go +++ b/module/sys/sys_test.go @@ -42,10 +42,11 @@ func TestInitVersionInfoShape(t *testing.T) { if err != nil { t.Fatalf("GetItem(version_info): %v", err) } - tup, ok := v.(*objects.Tuple) + ss, ok := v.(*objects.StructSeq) if !ok { - t.Fatalf("version_info is %T, want *Tuple", v) + t.Fatalf("version_info is %T, want *StructSeq", v) } + tup := ss.AsTuple() if tup.Len() != 5 { t.Fatalf("version_info has %d items, want 5", tup.Len()) } From aa8dbd935ea9dc0ff48b5d35f0ca9e40456ff8e9 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 12:30:19 +0700 Subject: [PATCH 38/84] imp: write and read __pycache__ bytecode caches Source loaders now persist compiled code to __pycache__/..pyc and read it back on the next import, validating the timestamp header against the source mtime and size. A cached pyc whose co_filename was set by py_compile's dfile gets rewritten to the real source path on load, matching _imp._fix_co_filename. Flipped sys.dont_write_bytecode back to its CPython default of False so the cache actually gets written, and fixed open() to create files with 0o666 (letting the umask reduce it) instead of a hardcoded 0o600, so the .pyc inherits the source's permission bits. __import__ with an empty fromlist now returns the top-level package and runs _handle_fromlist for a non-empty one, and path-based __file__ / __path__ / __cached__ are absolutized the way spec_from_file_location does. marshal grew Complex/Bytes/Tuple const handling so Python-side code objects round-trip through the pyc writer. --- imp/pathfinder.go | 34 +++++- imp/writepyc.go | 265 ++++++++++++++++++++++++++++++++++++++++++++ marshal/code.go | 10 ++ marshal/marshal.go | 14 +++ module/io/module.go | 2 +- module/sys/sys.go | 7 +- vm/builtins_hook.go | 32 +++++- 7 files changed, 351 insertions(+), 13 deletions(-) create mode 100644 imp/writepyc.go diff --git a/imp/pathfinder.go b/imp/pathfinder.go index e4264152..86ab3784 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -163,6 +163,18 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er if dir == "" { dir = "." } + // spec_from_file_location runs the resolved location through + // _path_abspath, so every __file__, __path__ and __cached__ a + // path-based import produces is absolute even when the sys.path + // entry is relative ('', '.', or a relative directory). Absolutize + // the directory up front so the file paths joined below, the + // bytecode-cache path, and the spec origin all agree and match + // CPython's absolute strings. + // + // CPython: Lib/importlib/_bootstrap_external.py:782 spec_from_file_location (_path_abspath) + if abs, err := filepath.Abs(dir); err == nil { + dir = abs + } // A sys.path entry that is not a directory (a zip archive, or a // path that points inside one) is handled by a custom importer // registered on sys.path_hooks, exactly as CPython's PathFinder @@ -592,9 +604,14 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam if err != nil { return nil, fmt.Errorf("imp: loadAsPackage %q: %w", name, err) } - code, err := compiler(src, initFile) - if err != nil { - return nil, fmt.Errorf("imp: loadAsPackage %q: compile: %w", name, err) + code, ok := readBytecodeCache(initFile) + if !ok { + var cerr error + code, cerr = compiler(src, initFile) + if cerr != nil { + return nil, fmt.Errorf("imp: loadAsPackage %q: compile: %w", name, cerr) + } + writeBytecodeCache(initFile, code) } setSpecInitializing(mod, true) _, execErr := exec.ExecCode(code, mod) @@ -764,9 +781,14 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str if err != nil { return nil, fmt.Errorf("imp: loadAsModule %q: %w", name, err) } - code, err := compiler(src, file) - if err != nil { - return nil, fmt.Errorf("imp: loadAsModule %q: compile: %w", name, err) + code, ok := readBytecodeCache(file) + if !ok { + var cerr error + code, cerr = compiler(src, file) + if cerr != nil { + return nil, fmt.Errorf("imp: loadAsModule %q: compile: %w", name, cerr) + } + writeBytecodeCache(file, code) } setSpecInitializing(mod, true) _, execErr := exec.ExecCode(code, mod) diff --git a/imp/writepyc.go b/imp/writepyc.go new file mode 100644 index 00000000..a2fbb574 --- /dev/null +++ b/imp/writepyc.go @@ -0,0 +1,265 @@ +// Bytecode-cache writing for the source loaders. After a .py file is +// compiled, SourceFileLoader.exec_module writes the resulting code +// object to a PEP 3147 __pycache__/..pyc file so the next +// import skips recompilation. gopy's import runs Go-side, so the write +// path is reimplemented here against the marshal .pyc writer. +// +// CPython: Lib/importlib/_bootstrap_external.py:1129 SourceFileLoader.get_code +// CPython: Lib/importlib/_bootstrap_external.py:1185 SourceFileLoader.set_data +package imp + +import ( + "bytes" + "os" + "path/filepath" + "strconv" + "strings" + + "github.com/tamnd/gopy/marshal" + "github.com/tamnd/gopy/objects" +) + +// pycacheDir is the PEP 3147 cache subdirectory name. +// +// CPython: Lib/importlib/_bootstrap_external.py:60 _PYCACHE +const pycacheDir = "__pycache__" + +// dontWriteBytecode reports sys.dont_write_bytecode. When True the +// source loaders skip the cache write entirely, exactly like CPython's +// SourceFileLoader.get_code (the `not sys.dont_write_bytecode` guard). +// +// CPython: Lib/importlib/_bootstrap_external.py:1167 source_to_code cache guard +func dontWriteBytecode() bool { + sysMod, ok := GetModule("sys") + if !ok { + return true + } + v, err := objects.GetAttr(sysMod, objects.NewStr("dont_write_bytecode")) + if err != nil { + return true + } + return objects.IsTrue(v) +} + +// cacheTag returns sys.implementation.cache_tag, the per-interpreter +// bytecode-cache discriminator (e.g. "gopy-3140"). The empty string +// signals a missing tag, in which case the caller skips caching the +// same way cache_from_source raises NotImplementedError. +// +// CPython: Lib/importlib/_bootstrap_external.py:480 cache_from_source (tag read) +func cacheTag() string { + sysMod, ok := GetModule("sys") + if !ok { + return "" + } + impl, err := objects.GetAttr(sysMod, objects.NewStr("implementation")) + if err != nil { + return "" + } + tag, err := objects.GetAttr(impl, objects.NewStr("cache_tag")) + if err != nil { + return "" + } + t, ok := tag.(*objects.Unicode) + if !ok { + return "" + } + return t.Value() +} + +// pycachePrefix returns sys.pycache_prefix as (value, set). When set, +// caches live under that root directory mirroring the source's absolute +// path instead of an adjacent __pycache__. +// +// CPython: Lib/importlib/_bootstrap_external.py:490 cache_from_source (prefix branch) +func pycachePrefix() (string, bool) { + sysMod, ok := GetModule("sys") + if !ok { + return "", false + } + v, err := objects.GetAttr(sysMod, objects.NewStr("pycache_prefix")) + if err != nil || objects.IsNone(v) { + return "", false + } + p, ok := v.(*objects.Unicode) + if !ok { + return "", false + } + return p.Value(), true +} + +// cacheFromSource computes the .pyc path for a source file, matching +// importlib.util.cache_from_source so the path gopy writes is the same +// one spec_from_file_location records as __cached__ and the loader reads +// back. Only the optimization=” (sys.flags.optimize == 0) case is +// produced; gopy never runs at -O. +// +// CPython: Lib/importlib/_bootstrap_external.py:466 cache_from_source +func cacheFromSource(sourcePath string) string { + tag := cacheTag() + if tag == "" { + return "" + } + head, tail := filepath.Split(sourcePath) + base := tail + sep := "" + if dot := strings.LastIndex(tail, "."); dot >= 0 { + base, sep = tail[:dot], "." + if base == "" { + // A leading-dot name like ".pyc" keeps the whole tail as base. + base = tail + sep = "" + } + } + almost := base + sep + tag + filename := almost + ".pyc" + if prefix, ok := pycachePrefix(); ok { + // CPython rebuilds the source's absolute directory under the prefix, + // dropping the volume separator so the tree nests cleanly. + absHead, err := filepath.Abs(head) + if err != nil { + absHead = head + } + absHead = strings.TrimPrefix(absHead, string(filepath.Separator)) + return filepath.Join(prefix, absHead, filename) + } + return filepath.Join(filepath.Clean(head), pycacheDir, filename) +} + +// readBytecodeCache returns the cached code object for sourcePath when a +// fresh, valid .pyc exists under __pycache__. "Fresh" means the .pyc +// magic matches and its timestamp-mode header records exactly the +// source's current mtime and size, the same staleness test +// SourceFileLoader.get_code applies before trusting the cache. A hash- +// mode .pyc (PEP 552) is only trusted when its hash bit is unchecked; +// any other condition (missing, stale, unreadable, checked-hash) returns +// ok=false so the caller recompiles from source. +// +// CPython: Lib/importlib/_bootstrap_external.py:1129 SourceFileLoader.get_code +// CPython: Lib/importlib/_bootstrap_external.py:585 _validate_timestamp_pyc +func readBytecodeCache(sourcePath string) (*objects.Code, bool) { + dest := cacheFromSource(sourcePath) + if dest == "" { + return nil, false + } + info, err := os.Stat(sourcePath) + if err != nil { + return nil, false + } + f, err := os.Open(dest) //nolint:gosec // dest is cacheFromSource of a trusted source path. + if err != nil { + return nil, false + } + defer f.Close() + code, hdr, err := marshal.ReadPyc(f) + if err != nil { + return nil, false + } + if hdr.Flags&0x1 != 0 { + // Hash-based .pyc: an unchecked-hash cache is trusted unconditionally, + // a checked-hash cache would need the source hash recomputed, which + // the timestamp fast path does not do, so fall back to recompiling. + // + // CPython: Lib/importlib/_bootstrap_external.py:609 _validate_hash_pyc + if hdr.Flags&0x2 != 0 { + return code, true + } + return nil, false + } + mtime := uint32(info.ModTime().Unix()) + size := uint32(info.Size()) + if hdr.Mtime != mtime || hdr.SourceSize != size { + return nil, false + } + // The cached code object carries whatever co_filename it was compiled + // with (py_compile's dfile can differ from the real source). When the + // source still exists the loader rewrites co_filename to the actual + // path, recursing into nested code consts, exactly like _compile_bytecode + // calling _imp._fix_co_filename. + // + // CPython: Lib/importlib/_bootstrap_external.py:809 _compile_bytecode + // CPython: Python/import.c:1276 _imp__fix_co_filename_impl + fixCoFilename(code, code.Filename, sourcePath) + return code, true +} + +// fixCoFilename rewrites co_filename on code and every nested code const +// whose filename matches oldname, mirroring CPython's recursive +// update_code_filenames. Only matching consts are touched so that a code +// object compiled against a different file is left alone. +// +// CPython: Python/import.c:1243 update_code_filenames +func fixCoFilename(code *objects.Code, oldname, newname string) { + if code.Filename != oldname { + return + } + code.Filename = newname + for _, c := range code.Consts { + if nested, ok := c.(*objects.Code); ok { + fixCoFilename(nested, oldname, newname) + } + } + code.SyncConstObjs() +} + +// writeBytecodeCache writes code to the .pyc cache for sourcePath unless +// sys.dont_write_bytecode is set. The header records the source file's +// mtime and size so a stale cache is detected on the next import. A +// write failure is swallowed: CPython's set_data treats a NotADirectory +// or permission error as non-fatal (the import still succeeds from +// source), and so does gopy. +// +// CPython: Lib/importlib/_bootstrap_external.py:1167 get_code (cache write) +// CPython: Lib/importlib/_bootstrap_external.py:1185 set_data (atomic write) +func writeBytecodeCache(sourcePath string, code *objects.Code) { + if dontWriteBytecode() { + return + } + dest := cacheFromSource(sourcePath) + if dest == "" { + return + } + info, err := os.Stat(sourcePath) + if err != nil { + return + } + mtime := uint32(info.ModTime().Unix()) + size := uint32(info.Size()) + + var buf bytes.Buffer + if err := marshal.WritePyc(&buf, code, mtime, size); err != nil { + return + } + if err := os.MkdirAll(filepath.Dir(dest), 0o777); err != nil { + return + } + // The cache inherits the source's permission bits plus write access, so a + // read-only .py still yields a rewritable .pyc. + // + // CPython: Lib/importlib/_bootstrap_external.py:438 _calc_mode + mode := os.FileMode(info.Mode().Perm()) | 0o200 + + // Write atomically the way _write_atomic does: a uniquely-suffixed temp + // file in the cache directory opened O_EXCL with the computed mode, then + // rename over the target. The temp name is keyed off the pid so concurrent + // writers do not collide. + // + // CPython: Lib/importlib/_bootstrap_external.py:184 _write_atomic + tmp := dest + "." + strconv.Itoa(os.Getpid()) + ".tmp" + f, err := os.OpenFile(tmp, os.O_EXCL|os.O_CREATE|os.O_WRONLY, mode&0o666) //nolint:gosec // tmp derives from a trusted cache path. + if err != nil { + return + } + if _, err := f.Write(buf.Bytes()); err != nil { + _ = f.Close() + _ = os.Remove(tmp) + return + } + if err := f.Close(); err != nil { + _ = os.Remove(tmp) + return + } + if err := os.Rename(tmp, dest); err != nil { + _ = os.Remove(tmp) + } +} diff --git a/marshal/code.go b/marshal/code.go index 899b2ac2..0faf66cd 100644 --- a/marshal/code.go +++ b/marshal/code.go @@ -424,6 +424,16 @@ func splitLocalsplusnames(names []any, kinds []byte) (varnames []string, cellvar // CPython: Objects/codeobject.c:203 intern_constants // CPython: Python/marshal.c:391 w_ref interned check. func wrapConstStrings(v any) any { + // A code object that round-tripped through Python (marshal.load then + // code.replace) carries co_consts as objects.Object values rather than + // the native Go consts a freshly-compiled gopy Code holds. Normalize + // those to the native marshal value set first so the rest of this + // function (and writeBody) sees ints, strings, tuples and code objects. + if obj, ok := v.(objects.Object); ok { + if n, err := fromObject(obj); err == nil { + v = n + } + } switch x := v.(type) { case string: if shouldInternString(x) { diff --git a/marshal/marshal.go b/marshal/marshal.go index 309d4936..b0acd1f1 100644 --- a/marshal/marshal.go +++ b/marshal/marshal.go @@ -859,6 +859,20 @@ func fromObject(obj objects.Object) (any, error) { return x, nil case *objects.Code: return x, nil + case *objects.Complex: + return x.Complex128(), nil + case *objects.Bytes: + return x.Bytes(), nil + case *objects.Tuple: + out := make([]any, x.Len()) + for i := 0; i < x.Len(); i++ { + n, err := fromObject(x.Item(i)) + if err != nil { + return nil, err + } + out[i] = n + } + return out, nil } // None and str use unexported concrete types; dispatch via type slots. if obj.Type() == objects.NoneType() { diff --git a/module/io/module.go b/module/io/module.go index 1d3dcf55..688c31c4 100644 --- a/module/io/module.go +++ b/module/io/module.go @@ -442,7 +442,7 @@ func ioOpen(a *ioOpenArgs) (objects.Object, error) { clearGoFinalizer(f) raw = NewFileIO(f, a.file, rawMode, readable, writable) } else { - f, err := os.OpenFile(a.file, flag, 0o600) + f, err := os.OpenFile(a.file, flag, 0o666) if err != nil { // Preserve the os.PathError chain (errno + filename) with %w // so the unwind path builds a FileNotFoundError / diff --git a/module/sys/sys.go b/module/sys/sys.go index 52ccd642..4d4ecff3 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -133,11 +133,12 @@ func Init() (*objects.Dict, error) { // Import-system state the runtime exposes at the top level. CPython // stamps these in PySys_Create / the import bootstrap; runpy and // pkgutil read them directly. gopy's import is Go-side so the hooks - // list and the importer cache stay empty, and bytecode is never - // written, but the attributes must exist with the right types. + // list and the importer cache stay empty, but the source loaders do + // write __pycache__/..pyc files, so the default matches + // CPython: bytecode writing is on unless -B / PYTHONDONTWRITEBYTECODE. // // CPython: Python/sysmodule.c _PySys_AddObject path_hooks/path_importer_cache - if err := setItem(d, "dont_write_bytecode", objects.NewBool(true)); err != nil { + if err := setItem(d, "dont_write_bytecode", objects.NewBool(false)); err != nil { return nil, err } // pycache_prefix controls where the import machinery writes .pyc diff --git a/vm/builtins_hook.go b/vm/builtins_hook.go index c6295ad5..fceed148 100644 --- a/vm/builtins_hook.go +++ b/vm/builtins_hook.go @@ -10,6 +10,7 @@ import ( "errors" "fmt" "os" + "strings" "github.com/tamnd/gopy/builtins" pyerrors "github.com/tamnd/gopy/errors" @@ -614,7 +615,7 @@ func currentEvaluator(code *objects.Code, globals, locals, closure objects.Objec // likewise drops it pending fromlist-driven submodule discovery. // // CPython: Python/import.c:1561 PyImport_ImportModuleLevelObject -func currentImporter(name, pkgname string, level int, _ []string) (objects.Object, error) { +func currentImporter(name, pkgname string, level int, fromlist []string) (objects.Object, error) { ts := currentThread() if ts == nil { ts = state.NewThread() @@ -624,8 +625,9 @@ func currentImporter(name, pkgname string, level int, _ []string) (objects.Objec // // CPython: Python/import.c:1759 import_name reads interp->builtins_module. var b objects.Object - if f := frameStackFor(ts).Top(); f != nil { - b = callerBuiltins(f) + topFrame := frameStackFor(ts).Top() + if topFrame != nil { + b = callerBuiltins(topFrame) } exec := &vmExecutor{ts: ts, builtins: b} mod, err := imp.ImportModuleLevel(exec, name, pkgname, level) @@ -642,5 +644,29 @@ func currentImporter(name, pkgname string, level int, _ []string) (objects.Objec } return nil, err } + // _handle_fromlist / head-of-dotted-name selection, exactly like the + // IMPORT_NAME opcode path in importName: a non-empty fromlist forces + // the named submodules and returns the deepest module, while an empty + // fromlist for a dotted import returns the top-level package. + // + // CPython: Python/bltinmodule.c:259 builtin___import___impl + // CPython: Lib/importlib/_bootstrap.py:1463 _handle_fromlist + e := &evalState{ts: ts, f: topFrame} + if len(fromlist) > 0 { + items := make([]objects.Object, len(fromlist)) + for i, s := range fromlist { + items[i] = objects.NewStr(s) + } + if herr := e.handleFromlist(mod, objects.NewList(items), false); herr != nil { + return nil, herr + } + return mod, nil + } + if strings.Contains(name, ".") { + top := name[:strings.IndexByte(name, '.')] + if tm, ok := imp.GetModule(top); ok { + return tm, nil + } + } return mod, nil } From bdf4c6d2b2e0386732f659164076f694cd887cfb Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 15:48:31 +0700 Subject: [PATCH 39/84] import: route flat and package imports through _frozen_importlib.__import__ Stop short-circuiting IMPORT_NAME in the Go driver. tryImport now delegates to the live _frozen_importlib.__import__ once the bootstrap is installed, so flat and package imports run through the real importlib machinery and pick up SourceFileLoader, find_spec, and the frozen traceback frames. Fixing the routing surfaced several gaps that the old shortcut hid: - marshal: an argument that a nested function closes over carries both CO_FAST_LOCAL and CO_FAST_CELL, and CPython lists it in both co_varnames and co_cellvars. splitLocalsplusnames routed it to cellvars only, dropping it from co_varnames and shifting the keyword-only-arg name slice the frame reads. namedtuple tripped this on the second run (reading its own .pyc), reporting a local as a missing kwonly argument. Select each bucket by an independent bit test, matching get_localsplus_names. - bootstrap: the importlib package and its bootstrap submodules are loaded by the Go driver before the machinery is live, so they reached sys.modules without a __spec__. CPython freezes them and _setup hands them frozen specs. Rebuild a SourceFileLoader spec for every still-spec-less module that has a __file__, so `import importlib.util` no longer dies on a missing parent __spec__. - is_builtin and builtin_module_names must agree. Centralize the set of pure-Python stdlib modules gopy keeps in the inittab as bootstrap shortcuts (os, warnings, dataclasses, difflib, fnmatch) so BuiltinImporter declines them and PathFinder loads the vendored source. - sys._clear_type_descriptors: dataclasses calls it in _add_slots before rebuilding a class with __slots__ (gh-135228). Port it. - type version tags: VersionTag now assigns tags to all bases before its own, so a type holds a valid tag only when every base does. That invariant is what lets InvalidateVersionTag early-return on a zero tag, which was letting a stale specialized LOAD_METHOD survive a monkeypatch-after-warmup. - marshal: add Ellipsis so the SourceFileLoader .pyc writer can round-trip it. --- cmd/gopy/main.go | 22 +++++++++++++++- imp/inittab.go | 37 ++++++++++++++++++++++++++ marshal/code.go | 23 +++++++++++----- marshal/marshal.go | 35 ++++++++++++++++++++++++ module/_imp/module.go | 2 +- module/sys/sys.go | 49 +++++++++++++++++++++++----------- objects/type_specialize.go | 15 ++++++++++- vm/builtins_hook.go | 24 +++++++++++++++++ vm/eval_import.go | 23 ++++++++++++++++ vm/import_delegate.go | 54 ++++++++++++++++++++++++++++++++++++++ 10 files changed, 258 insertions(+), 26 deletions(-) create mode 100644 vm/import_delegate.go diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 4f74416b..eabb8beb 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -371,7 +371,27 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File " import zipimport\n" + " sys.path_hooks.insert(0, zipimport.zipimporter)\n" + "except ImportError:\n" + - " pass\n" + " pass\n" + + // CPython freezes importlib._bootstrap[_external] and the importlib + // package, so _setup gives them a __spec__ via the frozen loader + // before any user import runs. gopy loads these as plain .py files + // through the Go-side driver during this bootstrap, before the + // machinery is live, so they reach sys.modules without __spec__. + // Rebuild a SourceFileLoader spec for every still-spec-less module + // that carries a __file__ (importlib, importlib._bootstrap, + // _bootstrap_external, importlib.util), matching the spec PathFinder + // would have produced. Without __spec__ on the importlib package, + // `import importlib.util` raises AttributeError at _bootstrap.py:1325. + // + // CPython: Lib/importlib/_bootstrap.py:1517 _setup (spec fix-up loop) + "for _n in list(sys.modules):\n" + + " _m = sys.modules[_n]\n" + + " if getattr(_m, '__spec__', None) is None and getattr(_m, '__file__', None):\n" + + " try:\n" + + " _sp = _bootstrap_external.spec_from_file_location(_n, _m.__file__)\n" + + " _bootstrap._init_module_attrs(_sp, _m, override=True)\n" + + " except Exception:\n" + + " pass\n" if _, err := pythonrun.RunString(ts, install, "", parser.ModeFile, globals, nil); err != nil { fmt.Fprintln(stderr, "preload importlib:", err) return 1 diff --git a/imp/inittab.go b/imp/inittab.go index fc207f13..b4c57511 100644 --- a/imp/inittab.go +++ b/imp/inittab.go @@ -64,6 +64,43 @@ func ExtendInittab(entries []InittabEntry) error { return nil } +// shadowedByStdlib lists inittab names that CPython ships as pure-Python +// stdlib modules (.py files on sys.path), so they never appear in +// CPython's PyImport_Inittab. gopy keeps a Go implementation in the +// inittab as an early-bootstrap import shortcut, but the live import +// machinery must treat them as not-built-in: BuiltinImporter declines +// them and PathFinder loads the vendored source, so e.g. +// 'fnmatch' in sys.builtin_module_names stays False as on a normal +// CPython build, and is_builtin agrees with builtin_module_names. +var shadowedByStdlib = map[string]bool{ + "os": true, + "warnings": true, + "dataclasses": true, + "difflib": true, + "fnmatch": true, +} + +// ShadowedByStdlib reports whether name is registered in the inittab only +// as a bootstrap shortcut while CPython ships it as pure-Python stdlib, +// so it must be reported as not-built-in by is_builtin and excluded from +// sys.builtin_module_names. +func ShadowedByStdlib(name string) bool { + return shadowedByStdlib[name] +} + +// IsBuiltinName reports whether name resolves to a statically linked +// built-in module, the membership test behind both _imp.is_builtin and +// sys.builtin_module_names. Names shadowed by a pure-Python stdlib module +// are excluded so they load from source the way they do on CPython. +// +// CPython: Python/import.c:4720 _imp_is_builtin_impl +func IsBuiltinName(name string) bool { + if shadowedByStdlib[name] { + return false + } + return FindInitFunc(name) != nil +} + // FindInitFunc returns the InitFunc registered for name, or nil if the // module is not in the built-in table. // diff --git a/marshal/code.go b/marshal/code.go index 0faf66cd..7e677b3f 100644 --- a/marshal/code.go +++ b/marshal/code.go @@ -391,21 +391,30 @@ func boolCount(b bool) int { } // splitLocalsplusnames reconstructs varnames/cellvars/freevars from -// the wire-format combined array. +// the wire-format combined array. The three buckets are not disjoint: +// an argument that is also closed over by a nested function carries +// both CO_FAST_LOCAL and CO_FAST_CELL, and CPython lists it in both +// co_varnames and co_cellvars. Routing it to cellvars only would drop +// it from co_varnames and shift the argument-name slice the frame uses +// to report keyword-only arguments. Match get_localsplus_names: select +// each bucket by an independent bit test. +// +// CPython: Objects/codeobject.c:424 get_localsplus_names func splitLocalsplusnames(names []any, kinds []byte) (varnames []string, cellvars []string, freevars []string) { for i, n := range names { s, _ := n.(string) if i >= len(kinds) { break } - switch { - case kinds[i]&coFastFree != 0: - freevars = append(freevars, s) - case kinds[i]&coFastCell != 0: - cellvars = append(cellvars, s) - default: + if kinds[i]&coFastLocal != 0 { varnames = append(varnames, s) } + if kinds[i]&coFastCell != 0 { + cellvars = append(cellvars, s) + } + if kinds[i]&coFastFree != 0 { + freevars = append(freevars, s) + } } return varnames, cellvars, freevars } diff --git a/marshal/marshal.go b/marshal/marshal.go index b0acd1f1..8ec11881 100644 --- a/marshal/marshal.go +++ b/marshal/marshal.go @@ -19,6 +19,7 @@ import ( "math/big" "unsafe" + "github.com/tamnd/gopy/ast" "github.com/tamnd/gopy/objects" ) @@ -330,6 +331,14 @@ func (e *encoder) write(v any) error { } return e.writeByte(typeFalse) } + // The Ellipsis singleton (the `...` const) is short-circuited before + // the FLAG_REF memo, exactly like None / True / False. gopy spells the + // const as ast.EllipsisType; the runtime ellipsis object maps here too. + // + // CPython: Python/marshal.c:476 w_object (v == Py_Ellipsis) + if isEllipsisValue(v) { + return e.writeByte(typeEllipsis) + } e.depth++ defer func() { e.depth-- }() @@ -632,6 +641,13 @@ func (d *decoder) decodeTag(tag byte) (any, error) { return true, nil case typeFalse: return false, nil + case typeEllipsis: + // Decode to ast.EllipsisType, the same `...` const the compiler + // emits, so a marshalled-then-loaded code object round-trips + // identically to a freshly compiled one. + // + // CPython: Python/marshal.c r_object TYPE_ELLIPSIS + return ast.Ellipsis, nil case typeInt: v, err := d.readInt32() return int64(v), err @@ -835,12 +851,31 @@ func toObject(v any) (objects.Object, error) { return objects.NewFloat(x), nil case string: return objects.NewStr(x), nil + case ast.EllipsisType: + return objects.Ellipsis(), nil case objects.Object: return x, nil } return nil, fmt.Errorf("marshal: cannot convert %T to Object", v) } +// isEllipsisValue reports whether v is the marshalable Ellipsis const, +// in either of the two spellings gopy uses: the compiler emits the +// ast.EllipsisType node for a `...` literal, while a code object built +// at runtime (e.g. via code.replace) may carry the runtime ellipsis +// singleton instead. Both serialize to TYPE_ELLIPSIS. +// +// CPython: Python/marshal.c:476 w_object (v == Py_Ellipsis) +func isEllipsisValue(v any) bool { + if _, ok := v.(ast.EllipsisType); ok { + return true + } + if obj, ok := v.(objects.Object); ok { + return obj == objects.Ellipsis() + } + return false +} + // fromObject converts an objects.Object back to a plain Go marshal // value so that set and frozenset items can pass through write(). func fromObject(obj objects.Object) (any, error) { diff --git a/module/_imp/module.go b/module/_imp/module.go index 9708bebb..05ed9d7f 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -207,7 +207,7 @@ func isBuiltin(args []objects.Object, _ map[string]objects.Object) (objects.Obje if err != nil { return nil, err } - if imp.FindInitFunc(name) != nil { + if imp.IsBuiltinName(name) { return objects.NewInt(1), nil } return objects.NewInt(0), nil diff --git a/module/sys/sys.go b/module/sys/sys.go index 4d4ecff3..46cfd18f 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -16,6 +16,7 @@ package sys import ( + "fmt" "sort" "strconv" @@ -130,6 +131,34 @@ func Init() (*objects.Dict, error) { return nil, err } + // Private helper that strips the __dict__ and __weakref__ descriptors + // from a mutable type's dict and refreshes its caches. dataclasses + // calls it in _add_slots before rebuilding the class with __slots__, + // so the original (descriptor-bearing) class can be garbage collected + // (gh-135228). Immutable types are rejected. + // + // CPython: Python/sysmodule.c:2658 sys__clear_type_descriptors_impl + if err := setItem(d, "_clear_type_descriptors", objects.NewBuiltinFunction("_clear_type_descriptors", func(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: _clear_type_descriptors() takes exactly one argument (%d given)", len(args)) + } + t, ok := args[0].(*objects.Type) + if !ok { + return nil, fmt.Errorf("TypeError: _clear_type_descriptors() argument 1 must be type, not %s", args[0].Type().Name) + } + if t.TpFlags&objects.TpFlagImmutable != 0 { + return nil, fmt.Errorf("TypeError: argument is immutable") + } + objects.DelTypeDescr(t, "__dict__") + objects.DelTypeDescr(t, "__weakref__") + // Fire PyType_Modified unconditionally, matching CPython which + // calls it after the pops even when neither descriptor was present. + t.InvalidateVersionTag() + return objects.None(), nil + })); err != nil { + return nil, err + } + // Import-system state the runtime exposes at the top level. CPython // stamps these in PySys_Create / the import bootstrap; runpy and // pkgutil read them directly. gopy's import is Go-side so the hooks @@ -302,31 +331,19 @@ func implementation() *objects.Namespace { return n } -// notStaticallyLinked lists modules that gopy keeps in its inittab as a -// Go-side import shortcut but that CPython ships as pure-Python stdlib -// (.py files on sys.path), so they never appear in CPython's -// PyImport_Inittab. They are filtered out of builtin_module_names so -// that, e.g., 'os' in sys.builtin_module_names stays False as on a -// normal CPython build. -var notStaticallyLinked = map[string]bool{ - "os": true, - "warnings": true, - "dataclasses": true, - "difflib": true, - "fnmatch": true, -} - // builtinModuleNames returns the sorted tuple of module names compiled // into the interpreter. CPython builds this directly from // PyImport_Inittab; gopy statically links every extension module into // the binary, so the table is the inittab snapshot minus the handful of -// pure-Python modules gopy registers there only as an import shortcut. +// pure-Python modules gopy registers there only as an import shortcut +// (imp.ShadowedByStdlib), keeping this list in lockstep with +// _imp.is_builtin. // // CPython: Python/sysmodule.c:3859 list_builtin_module_names func builtinModuleNames() *objects.Tuple { names := make([]string, 0, 64) for _, e := range imp.InittabSnapshot() { - if notStaticallyLinked[e.Name] { + if imp.ShadowedByStdlib(e.Name) { continue } names = append(names, e.Name) diff --git a/objects/type_specialize.go b/objects/type_specialize.go index 65f76d73..789a96a8 100644 --- a/objects/type_specialize.go +++ b/objects/type_specialize.go @@ -6,11 +6,24 @@ package objects // 32-bit version on first call. Returns 0 when the global counter // has wrapped (the specializer treats this as "give up"). // -// CPython: Python/typeobject.c:L312 _PyType_AssignVersionTag +// To respect the invariant that a type carries a valid version tag +// only when every one of its bases does, the tag is first assigned to +// all super classes. If any base cannot be assigned one (counter +// wrapped), this type gives up too. The invariant is what lets +// InvalidateVersionTag early-return on a zero tag: a base with tag 0 +// can have no subclass holding a live tag, so there is nothing cached +// to clear. +// +// CPython: Objects/typeobject.c:1344 assign_version_tag func (t *Type) VersionTag() uint32 { if t.versionTag != 0 { return t.versionTag } + for _, b := range t.Bases { + if b != nil && b.VersionTag() == 0 { + return 0 + } + } v := allocTypeVersionTag() if v == 0 { return 0 diff --git a/vm/builtins_hook.go b/vm/builtins_hook.go index fceed148..2ecf3f5e 100644 --- a/vm/builtins_hook.go +++ b/vm/builtins_hook.go @@ -629,6 +629,30 @@ func currentImporter(name, pkgname string, level int, fromlist []string) (object if topFrame != nil { b = callerBuiltins(topFrame) } + + // Prefer the live Python importlib, matching CPython where the builtin + // __import__ IS _frozen_importlib.__import__. It performs fromlist / + // dotted-head handling and registers in the shared sys.modules, so the + // manual logic below only runs during early bootstrap before + // _bootstrap._install has wired the frozen importer. + // + // CPython: Python/bltinmodule.c:259 builtin___import___impl + var callerGlobals objects.Object + if topFrame != nil { + callerGlobals = topFrame.Globals + } + flItems := make([]objects.Object, len(fromlist)) + for i, s := range fromlist { + flItems[i] = objects.NewStr(s) + } + var fl objects.Object = objects.None() + if len(flItems) > 0 { + fl = objects.NewTuple(flItems) + } + if mod, ok, derr := delegateImport(name, callerGlobals, objects.None(), fl, level); ok { + return mod, derr + } + exec := &vmExecutor{ts: ts, builtins: b} mod, err := imp.ImportModuleLevel(exec, name, pkgname, level) if err != nil { diff --git a/vm/eval_import.go b/vm/eval_import.go index 6523f7df..93f5f3ce 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -201,6 +201,29 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo } pkgname := globalName(e.f.Globals) + // Route through the live Python importlib the way CPython's + // import_name calls the builtin __import__ (= + // _frozen_importlib.__import__). _bootstrap.__import__ runs + // _find_and_load / _handle_fromlist and returns the head of a dotted + // name for an empty fromlist, so the module pushed here is already + // the one CPython would push. Delegating keeps a single import path + // so a patched loader.exec_module fires and the traceback carries the + // frames. Only when the bootstrap is not yet + // installed (early startup) does the Go driver below run. + // + // CPython: Python/ceval.c:2898 import_name + dlocals := e.f.Locals + if dlocals == nil { + dlocals = e.f.Globals + } + if mod, ok, derr := delegateImport(modname, orNone(e.f.Globals), orNone(dlocals), orNone(fromlistObj), level); ok { + if derr != nil { + return 0, true, derr + } + e.pushObject(mod) + return e.advance(), true, nil + } + exec := &vmExecutor{ts: e.ts, builtins: builtinsNS} mod, ierr := imp.ImportModuleLevelObject(exec, modname, pkgname, level) if ierr != nil { diff --git a/vm/import_delegate.go b/vm/import_delegate.go new file mode 100644 index 00000000..6a8e25a8 --- /dev/null +++ b/vm/import_delegate.go @@ -0,0 +1,54 @@ +package vm + +import ( + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/objects" +) + +// delegateImport routes an import through the live Python importlib +// machinery, the same way CPython's import_name looks up __import__ from +// the frame builtins and calls import_func(name, globals, locals, +// fromlist, level). The builtin __import__ resolves to +// _frozen_importlib.__import__ (interp->import_func, wired at bootstrap), +// which runs _find_and_load / _handle_fromlist and registers the result +// in the shared sys.modules. Delegating here keeps a single import path +// so a monkeypatched loader.exec_module fires and the traceback carries +// the frozen importlib frames. +// +// The returned ok is false when _frozen_importlib is not yet installed +// (early bootstrap, before _bootstrap._install has run), so the caller +// falls back to the Go import driver to load the bootstrap itself. +// +// CPython: Python/ceval.c:2898 import_name +// CPython: Lib/importlib/_bootstrap.py:1390 __import__ +func delegateImport(name string, globals, locals, fromlist objects.Object, level int) (objects.Object, bool, error) { + frozen, ok := imp.GetModule("_frozen_importlib") + if !ok { + return nil, false, nil + } + importFunc, err := objects.GetAttr(frozen, objects.NewStr("__import__")) + if err != nil { + return nil, false, nil //nolint:nilerr // missing __import__ means fall back to the Go driver. + } + if globals == nil { + globals = objects.None() + } + if locals == nil { + locals = objects.None() + } + if fromlist == nil { + fromlist = objects.None() + } + args := objects.NewTuple([]objects.Object{ + objects.NewStr(name), + globals, + locals, + fromlist, + objects.NewInt(int64(level)), + }) + mod, callErr := objects.Call(importFunc, args, nil) + if callErr != nil { + return nil, true, callErr + } + return mod, true, nil +} From 2e768d7798183debd06857aa98927c0ae358222b Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 16:28:13 +0700 Subject: [PATCH 40/84] import: trim importlib frames from tracebacks via frozen co_filename Port remove_importlib_frames so an import that fails hides the import machinery from the user traceback the way CPython does. The two bootstrap modules now compile under the synthetic / co_filename (they are frozen in CPython), and the trimmer matches those names: an ImportError drops every importlib chunk, anything else only drops chunks ending in _call_with_frames_removed, so a bug planted inside the machinery still shows up. Clears all of ImportTracebackTests. --- cmd/gopy/main.go | 24 ++++++++++++++ vm/eval_import.go | 4 +++ vm/import_delegate.go | 73 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 101 insertions(+) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index eabb8beb..4ad7abc1 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -500,6 +500,15 @@ func gopyCompile(src []byte, filename string) (*objects.Code, error) { if len(src) == 0 || src[len(src)-1] != '\n' { src = append(src, '\n') } + // CPython freezes importlib._bootstrap[_external], so the code objects of + // the import machinery carry the synthetic co_filename + // "" rather than a source path. gopy loads + // them from source; stamp the same frozen name so tracebacks that pass + // through the machinery read identically (test_import_bug) and + // remove_importlib_frames can recognise them. + // + // CPython: Python/pylifecycle.c:1041 init_importlib (frozen modules) + filename = frozenImportlibName(filename) mod, err := parser.ParseBytes(src, filename, parser.ModeFile) if err != nil { return nil, err @@ -534,6 +543,21 @@ func gopyCompile(src []byte, filename string) (*objects.Code, error) { return out, nil } +// frozenImportlibName maps the source paths of the two importlib bootstrap +// modules to the synthetic co_filename CPython gives their frozen code +// objects. Any other path is returned unchanged. +// +// CPython: Python/import.c:3501 remove_importlib_frames (frozen names) +func frozenImportlibName(filename string) string { + switch { + case strings.HasSuffix(filename, "importlib/_bootstrap_external.py"): + return "" + case strings.HasSuffix(filename, "importlib/_bootstrap.py"): + return "" + } + return filename +} + // runSource is the gopy -c entry. It dispatches to // pythonrun.RunSimpleString, the port of CPython's // PyRun_SimpleStringFlags. diff --git a/vm/eval_import.go b/vm/eval_import.go index 93f5f3ce..4f148838 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -218,6 +218,10 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo } if mod, ok, derr := delegateImport(modname, orNone(e.f.Globals), orNone(dlocals), orNone(fromlistObj), level); ok { if derr != nil { + // CPython: Python/import.c:3959 import_name trims the importlib + // machinery frames off the traceback before the calling frame is + // recorded on the way out. + removeImportlibFrames(e.ts) return 0, true, derr } e.pushObject(mod) diff --git a/vm/import_delegate.go b/vm/import_delegate.go index 6a8e25a8..a4297107 100644 --- a/vm/import_delegate.go +++ b/vm/import_delegate.go @@ -1,8 +1,11 @@ package vm import ( + pyerrors "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/objects" + "github.com/tamnd/gopy/state" + "github.com/tamnd/gopy/traceback" ) // delegateImport routes an import through the live Python importlib @@ -52,3 +55,73 @@ func delegateImport(name string, globals, locals, fromlist objects.Object, level } return mod, true, nil } + +// importVerbose reports whether the interpreter runs with -v, which +// suppresses the importlib frame trimming so the full machinery shows. +// +// CPython: Python/import.c:3522 _PyInterpreterState_GetConfig(...)->verbose +func importVerbose() bool { + sysMod, ok := imp.GetModule("sys") + if !ok { + return false + } + flags, err := objects.GetAttr(sysMod, objects.NewStr("flags")) + if err != nil { + return false + } + v, err := objects.GetAttr(flags, objects.NewStr("verbose")) + if err != nil { + return false + } + if i, ok := v.(*objects.Int); ok { + n, _ := i.Int64() + return n != 0 + } + return false +} + +// removeImportlibFrames strips importlib frames from the traceback of the +// exception currently on the thread. If it is an ImportError, every +// importlib chunk is trimmed; otherwise only chunks that end with a call +// to _call_with_frames_removed are trimmed. Matches CPython's behaviour of +// hiding the import machinery from user tracebacks. +// +// CPython: Python/import.c:3500 remove_importlib_frames +func removeImportlibFrames(ts *state.Thread) { + exc := pyerrors.Occurred(ts) + if exc == nil || importVerbose() { + return + } + const ( + removeFrames = "_call_with_frames_removed" + bootstrapFile = "" + externalFile = "" + ) + alwaysTrim := exc.ExcType != nil && objects.IsSubtype(exc.ExcType, pyerrors.PyExc_ImportError) + + // A dummy head node lets *outerLink overwrite the chain head uniformly, + // the way CPython threads prev_link/outer_link through PyObject** slots. + var dummy traceback.Traceback + dummy.Next = exc.TB + prevLink := &dummy.Next + var outerLink **traceback.Traceback + inImportlib := false + for tb := exc.TB; tb != nil; { + next := tb.Next + fn := tb.Entry.File + nowInImportlib := fn == bootstrapFile || fn == externalFile + if nowInImportlib && !inImportlib { + outerLink = prevLink + } + inImportlib = nowInImportlib + + if nowInImportlib && (alwaysTrim || tb.Entry.Name == removeFrames) { + *outerLink = next + prevLink = outerLink + } else { + prevLink = &tb.Next + } + tb = next + } + exc.TB = dummy.Next +} From 37942f1b528f2884d9185174b59fa9caa4187734 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 17:43:16 +0700 Subject: [PATCH 41/84] vm: own the const reference in LOAD_CONST LOAD_CONST was pushing the bare const object onto the stack without taking a reference, so the slot held a borrowed pointer where every other opcode assumes it owns what it popped. CALL_KW's DECREF_INPUTS then decref'd the kwnames tuple it consumed, and since the tuple lives in co_consts and was loaded by LOAD_CONST, each call drove its refcount down by one. Under a trace hook the import machinery calls _get_spec enough times per import that spec_from_file_location's kwnames const ('loader', 'submodule_search_locations') eventually hit zero and got cleared in place, after which the call bound both keyword args as positional and raised "takes from 1 to 2 positional arguments but 4 were given". It also corrupted unittest's consts badly enough that importing it blew up with a missing __code__. Push a new owned reference instead, matching PyStackRef_FromPyObjectNew in bytecodes.c. While here, fold the marshal co_code private-copy fix and the monitor base-opcode walk that the same investigation surfaced: unmarshalCode now copies co_code so the marshal reference table can't hand two code objects the same mutable slice (instrumenting one would rewrite the other), and the instrumentation/line walks compute the base opcode via _Py_GetBaseCodeUnit so they stay aligned over already-instrumented code. --- marshal/code.go | 28 +++++++++---- monitor/basecode.go | 70 +++++++++++++++++++++++++++++++++ monitor/install.go | 3 +- monitor/line.go | 3 +- vm/eval_dispatch_handwritten.go | 11 +++++- 5 files changed, 102 insertions(+), 13 deletions(-) create mode 100644 monitor/basecode.go diff --git a/marshal/code.go b/marshal/code.go index 7e677b3f..c1af528d 100644 --- a/marshal/code.go +++ b/marshal/code.go @@ -13,6 +13,7 @@ import ( "encoding/binary" "fmt" + "github.com/tamnd/gopy/monitor" "github.com/tamnd/gopy/objects" "github.com/tamnd/gopy/specialize" ) @@ -68,16 +69,20 @@ func marshalCode(enc *encoder, c *objects.Code, flag byte) error { } } // Mirror CPython's _PyCode_GetCode pre-write deopt: walk every - // codeunit and rewrite specialized opcodes back to their adaptive - // parent, then zero each trailing cache cell. Without this step a - // .pyc would carry whatever specialization state the in-memory Code - // happened to warm by marshal time, which is non-deterministic - // across runs and breaks byte-equality with the cpython oracle. + // codeunit and recover the base opcode, rewriting specialized + // opcodes back to their adaptive parent AND stripping the + // INSTRUMENTED_ markers (and the INSTRUMENTED_LINE side table) + // that sys.settrace / sys.monitoring leave in the live bytecode, + // then zero each trailing cache cell. Without this a .pyc would + // carry whatever specialization or monitoring state the in-memory + // Code happened to warm by marshal time: non-deterministic across + // runs, and on reload an INSTRUMENTED_LINE with no monitoring data + // behind it would dispatch a NOP in place of the real opcode. // specialize.Enable on unmarshalCode re-runs Quicken so adaptive // counters get reseeded on load. // // CPython: Objects/codeobject.c:2310 _PyCode_GetCode (deopts before write) - if err := enc.writeCachedBytes(specialize.DeoptCode(c.Code), true); err != nil { + if err := enc.writeCachedBytes(monitor.BaseCode(c), true); err != nil { return err } consts := make([]any, len(c.Consts)) @@ -169,7 +174,16 @@ func unmarshalCode(d *decoder) (*objects.Code, error) { if !ok { return nil, fmt.Errorf("marshal: code.code expected bytes, got %T", codeObj) } - c.Code = code + // PyCode_New copies co_code into the per-code co_code_adaptive + // buffer that specialization and instrumentation mutate in place; + // the immutable co_code bytes object is never touched. gopy keeps + // one slice for both roles, so it must own a private copy here. + // Otherwise marshal's reference table, which dedups byte-identical + // co_code across sibling functions, hands two code objects the same + // backing array and an in-place rewrite on one corrupts the other. + // + // CPython: Objects/codeobject.c:117 _PyCode_New (co_code_adaptive copy) + c.Code = append([]byte(nil), code...) // consts tuple constsObj, err := d.read() diff --git a/monitor/basecode.go b/monitor/basecode.go new file mode 100644 index 00000000..d8c669e1 --- /dev/null +++ b/monitor/basecode.go @@ -0,0 +1,70 @@ +// Recovering the underlying bytecode from a live code object. The +// interpreter rewrites bytecode in place for both specialization +// (quickening) and instrumentation (the INSTRUMENTED_ markers plus +// the INSTRUMENTED_LINE side table). marshal needs the original, +// un-instrumented, un-specialized bytes so a .pyc never captures the +// transient monitoring state of the process that wrote it. +// +// CPython: Python/instrumentation.c:637 _Py_GetBaseCodeUnit +// CPython: Objects/codeobject.c:2293 deopt_code + +package monitor + +import ( + "github.com/tamnd/gopy/compile" + "github.com/tamnd/gopy/objects" + "github.com/tamnd/gopy/specialize" +) + +// GetBaseCodeUnit returns the underlying opcode at codeunit i, stripping +// both specialization and instrumentation. The oparg byte is returned +// unchanged for the common case; instrumentation markers carry no oparg +// rewrite (ENTER_EXECUTOR, the only opcode that does, is JIT-only and +// never appears in gopy bytecode). +// +// CPython: Python/instrumentation.c:637 _Py_GetBaseCodeUnit +func GetBaseCodeUnit(code *objects.Code, i int) compile.Opcode { + opcode := compile.Opcode(code.Code[2*i]) + + // Below the instrumented range it is purely a specialized opcode: + // deopt to the adaptive parent and we are done. + if !IsInstrumented(opcode) { + return specialize.Deopt(opcode) + } + + data := CoMonitoring(code) + if opcode == compile.INSTRUMENTED_LINE && data != nil && data.Lines != nil { + opcode = compile.Opcode(getOriginalOpcode(data.Lines, i)) + } + if opcode == compile.INSTRUMENTED_INSTRUCTION && data != nil && i < len(data.PerInstructionOpcodes) { + opcode = compile.Opcode(data.PerInstructionOpcodes[i]) + } + if base := deinstrument[opcode]; base != 0 { + return base + } + return specialize.Deopt(opcode) +} + +// BaseCode returns a fresh slice holding code's bytecode with all +// specialization and instrumentation removed and every inline cache +// cell zeroed. This is the byte sequence marshal must write so .pyc +// output is independent of the warming/monitoring state of the +// process. On load specialize.Enable re-quickens the adaptive form. +// +// CPython: Objects/codeobject.c:2293 deopt_code (via _PyCode_GetCode) +func BaseCode(code *objects.Code) []byte { + out := make([]byte, len(code.Code)) + copy(out, code.Code) + size := len(out) / 2 + for i := 0; i < size; i++ { + base := GetBaseCodeUnit(code, i) + out[2*i] = byte(base) + caches := specialize.CacheCount(base) + for j := 1; j <= caches && i+j < size; j++ { + out[2*(i+j)] = 0 + out[2*(i+j)+1] = 0 + } + i += caches + } + return out +} diff --git a/monitor/install.go b/monitor/install.go index 74787f60..b76fcfaa 100644 --- a/monitor/install.go +++ b/monitor/install.go @@ -62,8 +62,7 @@ func forceInstrument(code *objects.Code, interp *InterpState) error { } for instr := 0; instr < len(data.Tools); { - op := compile.Opcode(byteAt(code.Code, instr)) - base := DeInstrument(specialize.Deopt(op)) + base := GetBaseCodeUnit(code, instr) if !OpcodeHasEvent(base) { instr += 1 + cacheCount(base, code) continue diff --git a/monitor/line.go b/monitor/line.go index 57994462..df85b88d 100644 --- a/monitor/line.go +++ b/monitor/line.go @@ -136,8 +136,7 @@ func initializeLines(code *objects.Code, line *LineInstrumentationData) { codeLen := instructionCount(code) currentLine := -1 for i := 0; i < codeLen; { - op := compile.Opcode(byteAt(code.Code, i)) - base := DeInstrument(specialize.Deopt(op)) + base := GetBaseCodeUnit(code, i) line2 := LineForOffset(code, i) setLineDelta(line, i, computeLineDelta(code, line2)) length := 1 + cacheCount(base, code) diff --git a/vm/eval_dispatch_handwritten.go b/vm/eval_dispatch_handwritten.go index 092e0d5c..224564cb 100644 --- a/vm/eval_dispatch_handwritten.go +++ b/vm/eval_dispatch_handwritten.go @@ -217,13 +217,20 @@ func deriveGroupHere(src *pyerrors.Exception, subset []*pyerrors.Exception) *pye return pyerrors.New(src.ExcType, objects.NewTuple([]objects.Object{message, leaves})) } -// CPython: Python/bytecodes.c LOAD_CONST: (-- value) reads from frame->code->co_consts[oparg]. +// LOAD_CONST pushes a NEW (owned) reference to co_consts[oparg]: the +// const stays alive in the code object, so the stack slot must own its +// own strong reference. Otherwise an opcode that decrefs its inputs +// (CALL_KW decrefing the kwnames const, BUILD_* consuming a const, +// etc.) drives the shared const's refcount to zero and frees an object +// the code object still references. Mirrors PyStackRef_FromPyObjectNew. +// +// CPython: Python/bytecodes.c LOAD_CONST (value = PyStackRef_FromPyObjectNew(GETITEM(...))) func (e *evalState) opLOAD_CONST(oparg uint32) (next int, ok bool, err error) { co := e.f.Code if int(oparg) >= len(co.Consts) { return 0, true, fmt.Errorf("vm: LOAD_CONST index %d out of range", oparg) } - e.pushObject(e.constAt(int(oparg))) + e.push(stackref.FromObjectNew(e.constAt(int(oparg)))) return e.advance(), true, nil } From 543b2a69bccfa0c1fb9ed89ddeda155354cd39d5 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 17:43:23 +0700 Subject: [PATCH 42/84] import: re-stamp nested co_filename and add _thread._excepthook _imp._fix_co_filename only rewrote the top-level code object's filename, so functions defined inside a module loaded from a .pyc with a stale dfile kept the old path. Walk co_consts and re-stamp every nested code object that still carries the original name, matching update_code_filenames in import.c. Also expose _thread._excepthook and the _ExceptHookArgs struct sequence that threading.excepthook unpacks, so the threading shutdown path has the hook it expects. --- module/_imp/module.go | 21 ++++- module/_thread/excepthook.go | 167 +++++++++++++++++++++++++++++++++++ module/_thread/module.go | 8 ++ 3 files changed, 195 insertions(+), 1 deletion(-) create mode 100644 module/_thread/excepthook.go diff --git a/module/_imp/module.go b/module/_imp/module.go index 05ed9d7f..a4ba9587 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -421,10 +421,29 @@ func fixCoFilename(args []objects.Object, _ map[string]objects.Object) (objects. if !ok { return nil, fmt.Errorf("TypeError: _fix_co_filename() argument 2 must be str, not '%T'", args[1]) } - code.Filename = path.Value() + updateCodeFilenames(code, code.Filename, path.Value()) return objects.None(), nil } +// updateCodeFilenames rewrites co_filename to newname on co and on every +// nested code object reachable through co_consts that still carries the +// original oldname. A code compiled with a stale dfile (the .pyc records +// it) gets re-stamped to the real source path on import, including the +// code objects of the functions it defines. +// +// CPython: Python/import.c:4291 update_code_filenames +func updateCodeFilenames(co *objects.Code, oldname, newname string) { + if co.Filename != oldname { + return + } + co.Filename = newname + for _, c := range co.Consts { + if nested, ok := c.(*objects.Code); ok { + updateCodeFilenames(nested, oldname, newname) + } + } +} + // sourceHash mirrors _imp.source_hash(key, source). It hashes the // source buffer with SipHash-1-3 keyed by `key` and returns the result // as 8 little-endian bytes. diff --git a/module/_thread/excepthook.go b/module/_thread/excepthook.go new file mode 100644 index 00000000..7f5aa924 --- /dev/null +++ b/module/_thread/excepthook.go @@ -0,0 +1,167 @@ +// _thread._excepthook and the _ExceptHookArgs struct-sequence back +// threading.excepthook. When a Thread.run() lets an exception escape, +// threading._bootstrap_inner builds an _ExceptHookArgs(exc_type, +// exc_value, exc_traceback, thread) and hands it to threading.excepthook, +// whose C default is _thread._excepthook. The default prints +// "Exception in thread {name}:" followed by the traceback to the thread's +// stderr. +// +// CPython: Modules/_threadmodule.c:2275 thread_excepthook +package _thread + +import ( + "fmt" + + "github.com/tamnd/gopy/errors" + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/objects" +) + +// exceptHookArgsType is the _thread._ExceptHookArgs struct-sequence type. +// +// CPython: Modules/_threadmodule.c:2266 ExceptHookArgs_desc +var exceptHookArgsType = objects.NewStructSeqTypeDesc(objects.StructSeqDesc{ + Name: "_thread._ExceptHookArgs", + Fields: []objects.StructSeqField{ + {Name: "exc_type", Doc: "Exception type"}, + {Name: "exc_value", Doc: "Exception value"}, + {Name: "exc_traceback", Doc: "Exception traceback"}, + {Name: "thread", Doc: "Thread"}, + }, + NInSequence: 4, +}) + +// threadExceptHook is the default threading.excepthook. It expects a +// single _ExceptHookArgs and reports the uncaught thread exception. +// +// CPython: Modules/_threadmodule.c:2275 thread_excepthook +func threadExceptHook(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: _thread._excepthook expected 1 argument") + } + hookArgs, ok := args[0].(*objects.StructSeq) + if !ok || hookArgs.Type() != exceptHookArgsType { + return nil, fmt.Errorf( + "TypeError: _thread.excepthook argument type must be ExceptHookArgs") + } + items := hookArgs.Items() + + // Silently ignore SystemExit, matching the C default. + excType := items[0] + if t, ok := excType.(*objects.Type); ok && objects.IsSubtype(t, errors.PyExc_SystemExit) { + return objects.None(), nil + } + + excValue := items[1] + thread := items[3] + + // Resolve the destination stream: sys.stderr, else thread._stderr. + // + // CPython: Modules/_threadmodule.c:2298 _PySys_GetOptionalAttr(stderr) + file := optionalSysStderr() + if file == nil || file == objects.None() { + if thread == objects.None() { + return objects.None(), nil + } + f, err := objects.GetAttr(thread, objects.NewStr("_stderr")) + if err != nil { + return nil, err + } + if f == objects.None() { + return objects.None(), nil + } + file = f + } + + if err := threadExceptHookFile(file, excValue, thread); err != nil { + return nil, err + } + return objects.None(), nil +} + +// threadExceptHookFile writes the thread name header and the traceback to +// file, then flushes it. +// +// CPython: Modules/_threadmodule.c:2197 thread_excepthook_file +func threadExceptHookFile(file, excValue, thread objects.Object) error { + if err := fileWriteString(file, "Exception in thread "); err != nil { + return err + } + + name := objects.Object(nil) + if thread != objects.None() { + n, err := objects.GetAttr(thread, objects.NewStr("name")) + if err == nil { + name = n + } + } + if name != nil { + s, err := objects.Str(name) + if err != nil { + return err + } + if err := fileWriteString(file, s); err != nil { + return err + } + } else { + if err := fileWriteString(file, ""); err != nil { + return err + } + } + + if err := fileWriteString(file, ":\n"); err != nil { + return err + } + + // Display the traceback through the same formatter sys.excepthook uses. + // + // CPython: Modules/_threadmodule.c:2241 _PyErr_Display + text := "" + if exc, ok := excValue.(*errors.Exception); ok { + text = errors.FormatException(exc) + } else { + repr, err := objects.Str(excValue) + if err == nil { + text = excValue.Type().Name + ": " + repr + "\n" + } else { + text = excValue.Type().Name + "\n" + } + } + if err := fileWriteString(file, text); err != nil { + return err + } + + // file.flush(), best effort. + if flush, err := objects.GetAttr(file, objects.NewStr("flush")); err == nil { + _, _ = objects.Call(flush, objects.NewTuple(nil), nil) + } + return nil +} + +// fileWriteString writes s through file.write, mirroring PyFile_WriteString. +// +// CPython: Objects/fileobject.c PyFile_WriteString +func fileWriteString(file objects.Object, s string) error { + write, err := objects.GetAttr(file, objects.NewStr("write")) + if err != nil { + return err + } + _, err = objects.Call(write, objects.NewTuple([]objects.Object{objects.NewStr(s)}), nil) + return err +} + +// optionalSysStderr returns sys.stderr, or nil if sys or its stderr is +// unavailable. +// +// CPython: Python/sysmodule.c _PySys_GetOptionalAttr +func optionalSysStderr() objects.Object { + sysMod, ok := imp.GetModule("sys") + if !ok { + return nil + } + f, err := objects.GetAttr(sysMod, objects.NewStr("stderr")) + if err != nil { + return nil + } + return f +} diff --git a/module/_thread/module.go b/module/_thread/module.go index d676101f..2f85106a 100644 --- a/module/_thread/module.go +++ b/module/_thread/module.go @@ -50,6 +50,7 @@ func buildModule() (*objects.Module, error) { {"_is_main_interpreter", threadIsMainInterpreter}, {"stack_size", threadStackSize}, {"_count", threadCount}, + {"_excepthook", threadExceptHook}, } for _, e := range entries { bf := objects.NewBuiltinFunction(e.name, e.fn) @@ -97,6 +98,13 @@ func buildModule() (*objects.Module, error) { return nil, err } + // _ExceptHookArgs: struct-sequence threading.excepthook receives. + // + // CPython: Modules/_threadmodule.c:2710 PyStructSequence_NewType + if err := d.SetItem(objects.NewStr("_ExceptHookArgs"), exceptHookArgsType); err != nil { + return nil, err + } + // error is the module-level exception class. errCls := objects.NewType("_thread.error", []*objects.Type{objects.ObjectType()}) if err := d.SetItem(objects.NewStr("error"), errCls); err != nil { From d9dc3f67b5d9c604f846f8beeab792e972bf0311 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 17:58:09 +0700 Subject: [PATCH 43/84] import: align os/sys unit tests with posix.environ bytes keys and live inittab The os module now mirrors posix.environ (bytes keys on POSIX); update TestEnviron to look the key up as bytes. builtin_module_names is derived from the live inittab, so register a builtins stub in the sys test rather than relying on a hardcoded list. globalName follows _calc___package__, so a top-level module anchors to the empty package; widen the helper test to cover the submodule and package cases too. Also clean up the import-surface lint: propagate swallowed errors in the path-hook and shadowing helpers, split FindModule's per-entry scan into scanEntry/scanDir, and tidy a few misspellings and redundant conversions. --- cmd/gopy/main.go | 2 +- imp/pathfinder.go | 212 +++++++++++++++++++----------------- imp/shadowing.go | 7 +- imp/writepyc.go | 6 +- marshal/marshal.go | 2 +- module/io/module.go | 4 +- module/os/module_test.go | 12 +- module/sys/sys_test.go | 10 ++ objects/function_builtin.go | 7 +- vm/builtins_hook.go | 2 +- vm/eval_import.go | 28 ++--- vm/eval_import_test.go | 28 ++++- vm/import_delegate.go | 2 +- 13 files changed, 191 insertions(+), 131 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 4ad7abc1..50e331fb 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -505,7 +505,7 @@ func gopyCompile(src []byte, filename string) (*objects.Code, error) { // "" rather than a source path. gopy loads // them from source; stamp the same frozen name so tracebacks that pass // through the machinery read identically (test_import_bug) and - // remove_importlib_frames can recognise them. + // remove_importlib_frames can recognize them. // // CPython: Python/pylifecycle.c:1041 init_importlib (frozen modules) filename = frozenImportlibName(filename) diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 86ab3784..430edb41 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -159,114 +159,128 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er // (namespace portion path) / Lib/importlib/_bootstrap.py:1167 PathFinder var namespacePortions []string for _, entry := range search { - dir := entry - if dir == "" { - dir = "." - } - // spec_from_file_location runs the resolved location through - // _path_abspath, so every __file__, __path__ and __cached__ a - // path-based import produces is absolute even when the sys.path - // entry is relative ('', '.', or a relative directory). Absolutize - // the directory up front so the file paths joined below, the - // bytecode-cache path, and the spec origin all agree and match - // CPython's absolute strings. - // - // CPython: Lib/importlib/_bootstrap_external.py:782 spec_from_file_location (_path_abspath) - if abs, err := filepath.Abs(dir); err == nil { - dir = abs + mod, err := p.scanEntry(exec, entry, name, parent, tail, &namespacePortions) + if err != nil { + return nil, err } - // A sys.path entry that is not a directory (a zip archive, or a - // path that points inside one) is handled by a custom importer - // registered on sys.path_hooks, exactly as CPython's PathFinder - // routes such entries through zipimport.zipimporter. Only consult - // the hooks for non-directories so the directory scan below stays - // the fast path for the common case. - // - // CPython: Lib/importlib/_bootstrap_external.py:1236 _path_importer_cache - if !isDir(dir) { - spec, handled, herr := pathHookSpec(exec, entry, name) - if herr != nil { - return nil, herr - } - if !handled { - continue - } - // A namespace spec from the importer (loader None, search - // locations set) is a PEP 420 portion: collect it and keep - // scanning, exactly as CPython's PathFinder extends - // namespace_path instead of returning. A spec with a real - // loader is a concrete module, so load and return it. - // - // CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder._get_spec - if portions, isNS := namespacePortionsOf(spec); isNS { - namespacePortions = append(namespacePortions, portions...) - continue - } - mod, lerr := loadFromSpec(exec, name, spec) - if lerr != nil { - return nil, lerr - } - bindOnParent(parent, tail, mod) + if mod != nil { return mod, nil } - // Package case: //__init__.py. - // CPython: Lib/importlib/_bootstrap_external.py:1378 cache_module in cache - pkgDir := filepath.Join(dir, tail) - pkgInit := filepath.Join(pkgDir, "__init__.py") - if isFile(pkgInit) && caseOK(pkgDir) { - mod, err := loadAsPackage(exec, p.Compiler, pkgInit, pkgDir, name) - if err != nil { - return nil, err - } - bindOnParent(parent, tail, mod) - return mod, nil - } - // Sourceless package: //__init__.pyc. CPython's - // FileFinder walks its loader suffixes for __init__, so the - // bytecode loader is tried after the source loader. - // CPython: Lib/importlib/_bootstrap_external.py:1424 __init__ suffix loop - pkgInitPyc := filepath.Join(pkgDir, "__init__.pyc") - if isFile(pkgInitPyc) && caseOK(pkgDir) { - mod, err := loadAsPackageBytecode(exec, pkgInitPyc, pkgDir, name) - if err != nil { - return nil, err - } - bindOnParent(parent, tail, mod) - return mod, nil + } + if len(namespacePortions) > 0 { + mod := loadAsNamespace(exec, name, parent, namespacePortions) + bindOnParent(parent, tail, mod) + return mod, nil + } + return nil, fmt.Errorf("%w: %s", errFinderMiss, name) +} + +// scanEntry searches one sys.path entry for name. It returns (mod, nil) +// when the module was found and loaded, (nil, nil) when this entry did +// not match (FindModule should keep scanning), or (nil, err) on a load +// failure that must propagate. A PEP 420 namespace portion contributed +// by this entry is appended to *namespacePortions, leaving the module +// unresolved so the caller can fall back to a namespace package. +// +// CPython: Lib/importlib/_bootstrap_external.py:1357 FileFinder.find_spec +func (p *PathFinder) scanEntry(exec Executor, entry, name, parent, tail string, namespacePortions *[]string) (*objects.Module, error) { + dir := entry + if dir == "" { + dir = "." + } + // spec_from_file_location runs the resolved location through + // _path_abspath, so every __file__, __path__ and __cached__ a + // path-based import produces is absolute even when the sys.path + // entry is relative ('', '.', or a relative directory). Absolutize + // the directory up front so the file paths joined below, the + // bytecode-cache path, and the spec origin all agree and match + // CPython's absolute strings. + // + // CPython: Lib/importlib/_bootstrap_external.py:782 spec_from_file_location (_path_abspath) + if abs, err := filepath.Abs(dir); err == nil { + dir = abs + } + // A sys.path entry that is not a directory (a zip archive, or a + // path that points inside one) is handled by a custom importer + // registered on sys.path_hooks, exactly as CPython's PathFinder + // routes such entries through zipimport.zipimporter. Only consult + // the hooks for non-directories so the directory scan below stays + // the fast path for the common case. + // + // CPython: Lib/importlib/_bootstrap_external.py:1236 _path_importer_cache + if !isDir(dir) { + spec, handled, herr := pathHookSpec(exec, entry, name) + if herr != nil { + return nil, herr } - // Module case: /.py. - // CPython: Lib/importlib/_bootstrap_external.py:1391 suffix loop - modFile := filepath.Join(dir, tail+".py") - if isFile(modFile) && caseOK(modFile) { - mod, err := loadAsModule(exec, p.Compiler, modFile, name, parent) - if err != nil { - return nil, err - } - bindOnParent(parent, tail, mod) - return mod, nil + if !handled { + return nil, nil } - // Sourceless module: /.pyc, loaded by the bytecode - // loader once the source suffix has missed. - // CPython: Lib/importlib/_bootstrap_external.py:1215 SourcelessFileLoader - modPyc := filepath.Join(dir, tail+".pyc") - if isFile(modPyc) && caseOK(modPyc) { - mod, err := loadAsModuleBytecode(exec, modPyc, name, parent) - if err != nil { - return nil, err - } - bindOnParent(parent, tail, mod) - return mod, nil + // A namespace spec from the importer (loader None, search + // locations set) is a PEP 420 portion: collect it and keep + // scanning, exactly as CPython's PathFinder extends + // namespace_path instead of returning. A spec with a real + // loader is a concrete module, so load and return it. + // + // CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder._get_spec + if portions, isNS := namespacePortionsOf(spec); isNS { + *namespacePortions = append(*namespacePortions, portions...) + return nil, nil } - if isDir(pkgDir) && caseOK(pkgDir) { - namespacePortions = append(namespacePortions, pkgDir) + mod, lerr := loadFromSpec(exec, name, spec) + if lerr != nil { + return nil, lerr } + bindOnParent(parent, tail, mod) + return mod, nil } - if len(namespacePortions) > 0 { - mod := loadAsNamespace(exec, name, parent, namespacePortions) + return p.scanDir(exec, dir, name, parent, tail, namespacePortions) +} + +// scanDir searches a single directory sys.path entry for name, trying +// the source package, sourceless package, source module, and sourceless +// module loaders in CPython's suffix order. It returns the loaded module, +// (nil, nil) for a miss, or (nil, err) on a load failure. A bare package +// directory with no loadable __init__ is recorded as a PEP 420 portion. +// +// CPython: Lib/importlib/_bootstrap_external.py:1391 FileFinder suffix loop +func (p *PathFinder) scanDir(exec Executor, dir, name, parent, tail string, namespacePortions *[]string) (*objects.Module, error) { + pkgDir := filepath.Join(dir, tail) + // (suffix file, loader) tried in CPython's order: source package, + // sourceless package, source module, sourceless module. + loaders := []struct { + file string + base string // case-sensitivity check target + load func() (*objects.Module, error) + }{ + {filepath.Join(pkgDir, "__init__.py"), pkgDir, func() (*objects.Module, error) { + return loadAsPackage(exec, p.Compiler, filepath.Join(pkgDir, "__init__.py"), pkgDir, name) + }}, + {filepath.Join(pkgDir, "__init__.pyc"), pkgDir, func() (*objects.Module, error) { + return loadAsPackageBytecode(exec, filepath.Join(pkgDir, "__init__.pyc"), pkgDir, name) + }}, + {filepath.Join(dir, tail+".py"), filepath.Join(dir, tail+".py"), func() (*objects.Module, error) { + return loadAsModule(exec, p.Compiler, filepath.Join(dir, tail+".py"), name, parent) + }}, + {filepath.Join(dir, tail+".pyc"), filepath.Join(dir, tail+".pyc"), func() (*objects.Module, error) { + return loadAsModuleBytecode(exec, filepath.Join(dir, tail+".pyc"), name, parent) + }}, + } + for _, l := range loaders { + if !isFile(l.file) || !caseOK(l.base) { + continue + } + mod, err := l.load() + if err != nil { + return nil, err + } bindOnParent(parent, tail, mod) return mod, nil } - return nil, fmt.Errorf("%w: %s", errFinderMiss, name) + if isDir(pkgDir) && caseOK(pkgDir) { + *namespacePortions = append(*namespacePortions, pkgDir) + } + return nil, nil } // pathHookSpec consults sys.path_hooks for a custom importer able to load @@ -288,7 +302,7 @@ func pathHookSpec(exec Executor, entry, name string) (spec objects.Object, handl } findSpec, err := objects.GetAttr(importer, objects.NewStr("find_spec")) if err != nil { - return nil, false, nil + return nil, false, err } s, err := objects.Call(findSpec, objects.NewTuple([]objects.Object{objects.NewStr(name)}), nil) if err != nil { @@ -851,7 +865,7 @@ func setSpecInitializing(mod *objects.Module, on bool) { if err != nil || spec == nil || objects.IsNone(spec) { return } - var v objects.Object = objects.False() + v := objects.False() if on { v = objects.True() } diff --git a/imp/shadowing.go b/imp/shadowing.go index 37058341..b17f59c2 100644 --- a/imp/shadowing.go +++ b/imp/shadowing.go @@ -116,7 +116,7 @@ func ModuleIsPossiblyShadowing(originFound bool, origin string) (bool, error) { if sysPath0 == "" { cwd, err := os.Getwd() if err != nil { - return false, nil + return false, err } sysPath0 = cwd } @@ -185,7 +185,10 @@ func StdlibModuleNamesContains(modName objects.Object) (bool, error) { return false, nil } namesObj, found, err := optionalAttr(sysMod, "stdlib_module_names") - if err != nil || !found { + if err != nil { + return false, err + } + if !found { return false, nil } if !anySetCheck(namesObj) { diff --git a/imp/writepyc.go b/imp/writepyc.go index a2fbb574..ada72b9e 100644 --- a/imp/writepyc.go +++ b/imp/writepyc.go @@ -230,14 +230,16 @@ func writeBytecodeCache(sourcePath string, code *objects.Code) { if err := marshal.WritePyc(&buf, code, mtime, size); err != nil { return } - if err := os.MkdirAll(filepath.Dir(dest), 0o777); err != nil { + // 0o777 is CPython's makedirs mode for __pycache__; the umask narrows it. + // CPython: Lib/importlib/_bootstrap_external.py source_to_cache makedirs. + if err := os.MkdirAll(filepath.Dir(dest), 0o777); err != nil { //nolint:gosec // CPython __pycache__ mode, umask-narrowed return } // The cache inherits the source's permission bits plus write access, so a // read-only .py still yields a rewritable .pyc. // // CPython: Lib/importlib/_bootstrap_external.py:438 _calc_mode - mode := os.FileMode(info.Mode().Perm()) | 0o200 + mode := info.Mode().Perm() | 0o200 // Write atomically the way _write_atomic does: a uniquely-suffixed temp // file in the cache directory opened O_EXCL with the computed mode, then diff --git a/marshal/marshal.go b/marshal/marshal.go index 8ec11881..3d4db315 100644 --- a/marshal/marshal.go +++ b/marshal/marshal.go @@ -643,7 +643,7 @@ func (d *decoder) decodeTag(tag byte) (any, error) { return false, nil case typeEllipsis: // Decode to ast.EllipsisType, the same `...` const the compiler - // emits, so a marshalled-then-loaded code object round-trips + // emits, so a marshaled-then-loaded code object round-trips // identically to a freshly compiled one. // // CPython: Python/marshal.c r_object TYPE_ELLIPSIS diff --git a/module/io/module.go b/module/io/module.go index 688c31c4..37b1115d 100644 --- a/module/io/module.go +++ b/module/io/module.go @@ -442,7 +442,9 @@ func ioOpen(a *ioOpenArgs) (objects.Object, error) { clearGoFinalizer(f) raw = NewFileIO(f, a.file, rawMode, readable, writable) } else { - f, err := os.OpenFile(a.file, flag, 0o666) + // 0o666 is CPython's default create mode for open(); the process + // umask narrows it. CPython: Modules/_io/fileio.c _io_FileIO___init___impl. + f, err := os.OpenFile(a.file, flag, 0o666) //nolint:gosec // CPython open() default mode, umask-narrowed if err != nil { // Preserve the os.PathError chain (errno + filename) with %w // so the unwind path builds a FileNotFoundError / diff --git a/module/os/module_test.go b/module/os/module_test.go index a4bccb24..4c99b666 100644 --- a/module/os/module_test.go +++ b/module/os/module_test.go @@ -119,13 +119,21 @@ func TestEnviron(t *testing.T) { if !ok { t.Fatalf("environ is %T, want *Dict", env) } + // On POSIX, posix.environ holds bytes keys/values (Lib/os.py decodes + // them); the nt build keeps str. Look the key up the same way. + keyObj := func(s string) objects.Object { + if runtime.GOOS == "windows" { + return objects.NewStr(s) + } + return objects.NewBytes([]byte(s)) + } pathKey := "PATH" if runtime.GOOS == "windows" { - if _, err2 := envDict.GetItem(objects.NewStr("Path")); err2 == nil { + if _, err2 := envDict.GetItem(keyObj("Path")); err2 == nil { pathKey = "Path" } } - v, err := envDict.GetItem(objects.NewStr(pathKey)) + v, err := envDict.GetItem(keyObj(pathKey)) if err != nil { t.Fatalf("environ[%q]: %v", pathKey, err) } diff --git a/module/sys/sys_test.go b/module/sys/sys_test.go index b4f826f9..63071436 100644 --- a/module/sys/sys_test.go +++ b/module/sys/sys_test.go @@ -4,6 +4,7 @@ import ( "strings" "testing" + "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/objects" ) @@ -137,6 +138,15 @@ func TestInitMaxsizePositive(t *testing.T) { // builtins and sys are static-init, so they are advertised here. // Once 1623 lands the import system, this list grows. func TestInitBuiltinModuleNamesIncludesSys(t *testing.T) { + // builtin_module_names mirrors the live inittab. The full binary + // links the builtins module; register a stub here so the snapshot + // advertises it without importing module/builtins (which would form + // an import cycle through builtins -> module/sys). + if !imp.IsBuiltinName("builtins") { + _ = imp.AppendInittab("builtins", func() (*objects.Module, error) { + return objects.NewModule("builtins"), nil + }) + } d, err := Init() if err != nil { t.Fatalf("Init: %v", err) diff --git a/objects/function_builtin.go b/objects/function_builtin.go index 1485f9de..2e411e7b 100644 --- a/objects/function_builtin.go +++ b/objects/function_builtin.go @@ -395,11 +395,12 @@ func builtinFunctionHash(o Object) (int64, error) { } var y int64 var err error - if bf.boundDescr != nil { + switch { + case bf.boundDescr != nil: y, err = identityHash(bf.boundDescr) - } else if bf.methOrigin != nil { + case bf.methOrigin != nil: y, err = identityHash(bf.methOrigin) - } else { + default: y, err = identityHash(bf) } if err != nil { diff --git a/vm/builtins_hook.go b/vm/builtins_hook.go index 2ecf3f5e..5c9ea101 100644 --- a/vm/builtins_hook.go +++ b/vm/builtins_hook.go @@ -645,7 +645,7 @@ func currentImporter(name, pkgname string, level int, fromlist []string) (object for i, s := range fromlist { flItems[i] = objects.NewStr(s) } - var fl objects.Object = objects.None() + fl := objects.None() if len(flItems) > 0 { fl = objects.NewTuple(flItems) } diff --git a/vm/eval_import.go b/vm/eval_import.go index 4f148838..864e4cfd 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -45,11 +45,11 @@ func callerBuiltins(f *frame.Frame) objects.Object { // the mapping lacks the key, and (nil, false, err) for a real failure. // // CPython: Python/ceval.c:2805 PyMapping_GetOptionalItemString(f_builtins, "__import__") -func optionalImportFunc(builtins objects.Object) (objects.Object, bool, error) { - if builtins == nil { +func optionalImportFunc(builtinsMap objects.Object) (objects.Object, bool, error) { + if builtinsMap == nil { return nil, false, nil } - return objects.MappingGetOptionalItem(builtins, objects.NewStr("__import__")) + return objects.MappingGetOptionalItem(builtinsMap, objects.NewStr("__import__")) } // isDefaultImport reports whether fn is the built-in __import__ the @@ -272,7 +272,7 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo // // CPython: Python/bytecodes.c IMPORT_NAME comment "return the // head of the dotted name" when fromlist is empty. - result := objects.Object(mod) + result := mod if isEmptyFromlist(fromlistObj) && strings.Contains(modname, ".") { top := strings.SplitN(modname, ".", 2)[0] if tm, ok := imp.GetModule(top); ok { @@ -460,8 +460,8 @@ func checkPackageType(globals objects.Object) error { if !ok { return nil } - v, err := d.GetItem(objects.NewStr("__package__")) - if err != nil || v == nil || objects.IsNone(v) { + v, _ := d.GetItem(objects.NewStr("__package__")) + if v == nil || objects.IsNone(v) { return nil } if _, isStr := v.(*objects.Unicode); !isStr { @@ -655,11 +655,11 @@ func (e *evalState) importFromError(v objects.Object, name string, modNameObj ob } shadowingStdlib := false if shadowing { - if c, cerr := imp.StdlibModuleNamesContains(modNameOrUnknownObj); cerr != nil { + c, cerr := imp.StdlibModuleNamesContains(modNameOrUnknownObj) + if cerr != nil { return cerr - } else { - shadowingStdlib = c } + shadowingStdlib = c } // Fall back to __file__ for diagnostics when the spec carries no @@ -753,8 +753,8 @@ func (e *evalState) handleFromlist(mod objects.Object, fromlist objects.Object, return fmt.Errorf("TypeError: Item in %s must be str, not %s", where, item.Type().Name) } entry := x.Value() - switch { - case entry == "*": + switch entry { + case "*": if !recursive { if allObj, present, _ := getOptionalAttr(e, mod, "__all__"); present && allObj != nil { if rerr := e.handleFromlist(mod, allObj, true); rerr != nil { @@ -763,9 +763,11 @@ func (e *evalState) handleFromlist(mod objects.Object, fromlist objects.Object, } } default: - if _, present, gerr := getOptionalAttr(e, mod, entry); gerr != nil { + _, present, gerr := getOptionalAttr(e, mod, entry) + if gerr != nil { return gerr - } else if present { + } + if present { continue } fromName := modName + "." + entry diff --git a/vm/eval_import_test.go b/vm/eval_import_test.go index bdfec5b9..abe40cd3 100644 --- a/vm/eval_import_test.go +++ b/vm/eval_import_test.go @@ -217,7 +217,11 @@ func TestImportLevelHelper(t *testing.T) { } } -// TestGlobalNameHelper pins globalName for nil, non-dict, and a dict with __name__. +// TestGlobalNameHelper pins globalName for nil, non-dict, and the +// __name__ anchoring rules. globalName computes the package anchor the +// way _calc___package__ does: a plain module strips its final dotted +// component, while a package (one carrying __path__) anchors at its own +// name. func TestGlobalNameHelper(t *testing.T) { if got := globalName(nil); got != "" { t.Errorf("globalName(nil) = %q, want \"\"", got) @@ -225,9 +229,23 @@ func TestGlobalNameHelper(t *testing.T) { if got := globalName(objects.NewStr("x")); got != "" { t.Errorf("globalName(str) = %q, want \"\"", got) } - d := objects.NewDict() - _ = d.SetItem(objects.NewStr("__name__"), objects.NewStr("mypkg")) - if got := globalName(d); got != "mypkg" { - t.Errorf("globalName(dict) = %q, want \"mypkg\"", got) + // A top-level module rpartitions to the empty package. + mod := objects.NewDict() + _ = mod.SetItem(objects.NewStr("__name__"), objects.NewStr("mypkg")) + if got := globalName(mod); got != "" { + t.Errorf("globalName(module) = %q, want \"\"", got) + } + // A submodule strips its final component. + sub := objects.NewDict() + _ = sub.SetItem(objects.NewStr("__name__"), objects.NewStr("mypkg.sub")) + if got := globalName(sub); got != "mypkg" { + t.Errorf("globalName(submodule) = %q, want \"mypkg\"", got) + } + // A package (carrying __path__) anchors at its own name. + pkg := objects.NewDict() + _ = pkg.SetItem(objects.NewStr("__name__"), objects.NewStr("mypkg")) + _ = pkg.SetItem(objects.NewStr("__path__"), objects.NewList(nil)) + if got := globalName(pkg); got != "mypkg" { + t.Errorf("globalName(package) = %q, want \"mypkg\"", got) } } diff --git a/vm/import_delegate.go b/vm/import_delegate.go index a4297107..45acd544 100644 --- a/vm/import_delegate.go +++ b/vm/import_delegate.go @@ -83,7 +83,7 @@ func importVerbose() bool { // removeImportlibFrames strips importlib frames from the traceback of the // exception currently on the thread. If it is an ImportError, every // importlib chunk is trimmed; otherwise only chunks that end with a call -// to _call_with_frames_removed are trimmed. Matches CPython's behaviour of +// to _call_with_frames_removed are trimmed. Matches CPython's behavior of // hiding the import machinery from user tracebacks. // // CPython: Python/import.c:3500 remove_importlib_frames From ffbb4cd760b7663929c46485fc42b1841dd7fc05 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 18:07:45 +0700 Subject: [PATCH 44/84] debug: trace _bootstrap_external resolution on windows --- imp/pathfinder.go | 15 +++++++++++++++ vm/eval_import.go | 4 ++++ 2 files changed, 19 insertions(+) diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 430edb41..645b7515 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -93,6 +93,9 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er } parent, tail := splitParent(name) + if strings.Contains(name, "_bootstrap_external") { + fmt.Fprintf(os.Stderr, "DBG FindModule name=%q parent=%q tail=%q paths=%v\n", name, parent, tail, p.Paths) + } search := p.Paths if parent == "" && LivePathHook != nil { if live := LivePathHook(); live != nil { @@ -136,8 +139,14 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er } paths, err := readPackagePath(parentMod) if err != nil { + if strings.Contains(name, "_bootstrap_external") { + fmt.Fprintf(os.Stderr, "DBG readPackagePath err=%v\n", err) + } return nil, err } + if strings.Contains(name, "_bootstrap_external") { + fmt.Fprintf(os.Stderr, "DBG readPackagePath paths=%v\n", paths) + } search = paths // Track this child on the parent spec for the duration of the load so a @@ -267,6 +276,9 @@ func (p *PathFinder) scanDir(exec Executor, dir, name, parent, tail string, name }}, } for _, l := range loaders { + if strings.Contains(name, "_bootstrap_external") { + fmt.Fprintf(os.Stderr, "DBG scanDir candidate file=%q base=%q isFile=%v caseOK=%v\n", l.file, l.base, isFile(l.file), caseOK(l.base)) + } if !isFile(l.file) || !caseOK(l.base) { continue } @@ -808,6 +820,9 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str _, execErr := exec.ExecCode(code, mod) setSpecInitializing(mod, false) if execErr != nil { + if strings.Contains(name, "_bootstrap_external") { + fmt.Fprintf(os.Stderr, "DBG loadAsModule %q exec err=%v\n", name, execErr) + } RemoveModule(name) return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } diff --git a/vm/eval_import.go b/vm/eval_import.go index 864e4cfd..78f706ef 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -11,6 +11,7 @@ package vm import ( "errors" "fmt" + "os" "strings" "github.com/tamnd/gopy/builtins" @@ -773,6 +774,9 @@ func (e *evalState) handleFromlist(mod objects.Object, fromlist objects.Object, fromName := modName + "." + entry exec := &vmExecutor{ts: e.ts, builtins: callerBuiltins(e.f)} if _, ierr := imp.ImportModuleLevel(exec, fromName, "", 0); ierr != nil { + if strings.Contains(fromName, "_bootstrap_external") { + fmt.Fprintf(os.Stderr, "DBG handleFromlist import %q err=%v\n", fromName, ierr) + } // Backwards-compatibility: ignore a fromlist-triggered import // of a submodule that simply does not exist, but only when the // miss is for exactly this submodule. From a8f0eed04e43be2a8e8bc3c85bb2e88006181fc9 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 18:23:37 +0700 Subject: [PATCH 45/84] winreg: register the constant surface so _bootstrap_external imports on Windows importlib._bootstrap_external does 'import winreg' at module top level when sys.platform == 'win32', so on Windows the bootstrap failed with ModuleNotFoundError: No module named 'winreg'. Register a constant-only winreg module on every platform, the same way _winapi is wired: the HKEY_* predefined handles, the KEY_*/REG_* access and value-type constants, and the error alias of OSError. Those are all WindowsRegistryFinder reads at find_spec time, and that finder is deprecated and not on the default meta_path, so the unported registry functions are never reached. Also drop the temporary import-trace prints from pathfinder and eval_import that pinned this down. --- imp/pathfinder.go | 15 ----- module/winreg/module.go | 136 ++++++++++++++++++++++++++++++++++++++++ stdlibinit/registry.go | 7 +++ vm/eval_import.go | 4 -- 4 files changed, 143 insertions(+), 19 deletions(-) create mode 100644 module/winreg/module.go diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 645b7515..430edb41 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -93,9 +93,6 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er } parent, tail := splitParent(name) - if strings.Contains(name, "_bootstrap_external") { - fmt.Fprintf(os.Stderr, "DBG FindModule name=%q parent=%q tail=%q paths=%v\n", name, parent, tail, p.Paths) - } search := p.Paths if parent == "" && LivePathHook != nil { if live := LivePathHook(); live != nil { @@ -139,14 +136,8 @@ func (p *PathFinder) FindModule(exec Executor, name string) (*objects.Module, er } paths, err := readPackagePath(parentMod) if err != nil { - if strings.Contains(name, "_bootstrap_external") { - fmt.Fprintf(os.Stderr, "DBG readPackagePath err=%v\n", err) - } return nil, err } - if strings.Contains(name, "_bootstrap_external") { - fmt.Fprintf(os.Stderr, "DBG readPackagePath paths=%v\n", paths) - } search = paths // Track this child on the parent spec for the duration of the load so a @@ -276,9 +267,6 @@ func (p *PathFinder) scanDir(exec Executor, dir, name, parent, tail string, name }}, } for _, l := range loaders { - if strings.Contains(name, "_bootstrap_external") { - fmt.Fprintf(os.Stderr, "DBG scanDir candidate file=%q base=%q isFile=%v caseOK=%v\n", l.file, l.base, isFile(l.file), caseOK(l.base)) - } if !isFile(l.file) || !caseOK(l.base) { continue } @@ -820,9 +808,6 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str _, execErr := exec.ExecCode(code, mod) setSpecInitializing(mod, false) if execErr != nil { - if strings.Contains(name, "_bootstrap_external") { - fmt.Fprintf(os.Stderr, "DBG loadAsModule %q exec err=%v\n", name, execErr) - } RemoveModule(name) return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } diff --git a/module/winreg/module.go b/module/winreg/module.go new file mode 100644 index 00000000..896c6537 --- /dev/null +++ b/module/winreg/module.go @@ -0,0 +1,136 @@ +// Package winreg is the gopy port of CPython's PC/winreg.c. +// CPython only registers winreg on Windows. gopy registers it on every +// platform so importlib._bootstrap_external (which does `import winreg` +// at module top level under `if sys.platform == 'win32'`) imports +// regardless; stdlib consumers gate their use behind a win32 check so the +// module is only actually loaded on Windows. The exposed surface is the +// HKEY_*/KEY_*/REG_* integer constants and the `error` alias that +// _bootstrap_external's WindowsRegistryFinder reads at find_spec time. +// The function surface (OpenKey, QueryValue, EnumKey, CreateKey, the PyHKEY +// type, etc.) is not yet ported: it requires the Windows registry syscalls +// (advapi32), which gopy has no host binding for, and the default meta_path +// never installs WindowsRegistryFinder, so those names are never reached. +// Attribute lookups for the unported names raise AttributeError; that +// surfaces at call time on Windows for the deprecated registry finder only. +// +// CPython: PC/winreg.c:1 winreg module +// CPython: PC/winreg.c:2121 exec_module (constant registration) +package winreg + +import ( + "math/big" + + "github.com/tamnd/gopy/errors" + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/objects" +) + +func init() { + _ = imp.AppendInittab("winreg", buildModule) +} + +// buildModule constructs the winreg module dict with the constants +// CPython's exec_module registers. The HKEY_* predefined handles are the +// sign-extended 64-bit pointer values PyLong_FromVoidPtr yields on a 64-bit +// build (e.g. HKEY_CLASSES_ROOT == (HKEY)0x80000000 widened to +// 0xFFFFFFFF80000000). The KEY_*/REG_* access and value-type constants are +// the documented Windows SDK (winnt.h, winreg.h) literals inskey/ADD_INT +// register. +// +// CPython: PC/winreg.c:2121 exec_module +func buildModule() (*objects.Module, error) { + m := objects.NewModule("winreg") + d := m.Dict() + + // Predefined HKEY handles. CPython: PC/winreg.c:2125-2132 inskey. + // On a 64-bit build PyLong_FromVoidPtr sign-extends the (HKEY)0x8000000N + // pointer to a 64-bit value that overflows int64, so they are built from + // big.Int. + hkeys := map[string]uint64{ + "HKEY_CLASSES_ROOT": 0xFFFFFFFF80000000, + "HKEY_CURRENT_USER": 0xFFFFFFFF80000001, + "HKEY_LOCAL_MACHINE": 0xFFFFFFFF80000002, + "HKEY_USERS": 0xFFFFFFFF80000003, + "HKEY_PERFORMANCE_DATA": 0xFFFFFFFF80000004, + "HKEY_CURRENT_CONFIG": 0xFFFFFFFF80000005, + "HKEY_DYN_DATA": 0xFFFFFFFF80000006, + } + for name, value := range hkeys { + b := new(big.Int).SetUint64(value) + if err := d.SetItem(objects.NewStr(name), objects.NewIntFromBig(b)); err != nil { + return nil, err + } + } + + // Access-right and value-type constants. CPython: PC/winreg.c:2135-2210 + // ADD_INT. Values are the winnt.h / winreg.h public literals. + consts := map[string]int64{ + // Registry access rights (winnt.h). + "KEY_QUERY_VALUE": 0x0001, + "KEY_SET_VALUE": 0x0002, + "KEY_CREATE_SUB_KEY": 0x0004, + "KEY_ENUMERATE_SUB_KEYS": 0x0008, + "KEY_NOTIFY": 0x0010, + "KEY_CREATE_LINK": 0x0020, + "KEY_WOW64_64KEY": 0x0100, + "KEY_WOW64_32KEY": 0x0200, + "KEY_READ": 0x20019, + "KEY_WRITE": 0x20006, + "KEY_EXECUTE": 0x20019, + "KEY_ALL_ACCESS": 0xF003F, + + // RegCreateKeyEx / RegOpenKeyEx options (winnt.h). + "REG_OPTION_RESERVED": 0x0000, + "REG_OPTION_NON_VOLATILE": 0x0000, + "REG_OPTION_VOLATILE": 0x0001, + "REG_OPTION_CREATE_LINK": 0x0002, + "REG_OPTION_BACKUP_RESTORE": 0x0004, + "REG_OPTION_OPEN_LINK": 0x0008, + "REG_LEGAL_OPTION": 0x000F, + + // RegCreateKeyEx disposition (winnt.h). + "REG_CREATED_NEW_KEY": 0x00000001, + "REG_OPENED_EXISTING_KEY": 0x00000002, + + // RegRestoreKey / RegReplaceKey flags (winnt.h). + "REG_WHOLE_HIVE_VOLATILE": 0x00000001, + "REG_REFRESH_HIVE": 0x00000002, + "REG_NO_LAZY_FLUSH": 0x00000004, + + // RegNotifyChangeKeyValue filter (winnt.h). + "REG_NOTIFY_CHANGE_NAME": 0x00000001, + "REG_NOTIFY_CHANGE_ATTRIBUTES": 0x00000002, + "REG_NOTIFY_CHANGE_LAST_SET": 0x00000004, + "REG_NOTIFY_CHANGE_SECURITY": 0x00000008, + "REG_LEGAL_CHANGE_FILTER": 0x0000000F, + + // Registry value types (winnt.h). + "REG_NONE": 0, + "REG_SZ": 1, + "REG_EXPAND_SZ": 2, + "REG_BINARY": 3, + "REG_DWORD": 4, + "REG_DWORD_LITTLE_ENDIAN": 4, + "REG_DWORD_BIG_ENDIAN": 5, + "REG_LINK": 6, + "REG_MULTI_SZ": 7, + "REG_RESOURCE_LIST": 8, + "REG_FULL_RESOURCE_DESCRIPTOR": 9, + "REG_RESOURCE_REQUIREMENTS_LIST": 10, + "REG_QWORD": 11, + "REG_QWORD_LITTLE_ENDIAN": 11, + } + for name, value := range consts { + if err := d.SetItem(objects.NewStr(name), objects.NewInt(value)); err != nil { + return nil, err + } + } + + // winreg.error is an alias of OSError. CPython: PC/winreg.c:2218 + // (st->PyHKEY_Type aside, the module sets error = PyExc_OSError). + if err := d.SetItem(objects.NewStr("error"), errors.PyExc_OSError); err != nil { + return nil, err + } + + return m, nil +} diff --git a/stdlibinit/registry.go b/stdlibinit/registry.go index 7e47064d..51123664 100644 --- a/stdlibinit/registry.go +++ b/stdlibinit/registry.go @@ -318,6 +318,13 @@ import ( // CPython: Modules/_winapi.c:3023 _winapi_exec _ "github.com/tamnd/gopy/module/_winapi" + // Built-in module: winreg. Registers itself via module/winreg/ + // module.go init(). Exposes the HKEY_*/KEY_*/REG_* constants and the + // error alias that importlib._bootstrap_external imports at module top + // level on Windows. + // CPython: PC/winreg.c:2121 exec_module + _ "github.com/tamnd/gopy/module/winreg" + // Built-in module: _hashlib. Registers itself via // module/_hashlib/module.go init(). Backs Lib/hashlib.py with the // HASH object type and openssl_* convenience constructors using diff --git a/vm/eval_import.go b/vm/eval_import.go index 78f706ef..864e4cfd 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -11,7 +11,6 @@ package vm import ( "errors" "fmt" - "os" "strings" "github.com/tamnd/gopy/builtins" @@ -774,9 +773,6 @@ func (e *evalState) handleFromlist(mod objects.Object, fromlist objects.Object, fromName := modName + "." + entry exec := &vmExecutor{ts: e.ts, builtins: callerBuiltins(e.f)} if _, ierr := imp.ImportModuleLevel(exec, fromName, "", 0); ierr != nil { - if strings.Contains(fromName, "_bootstrap_external") { - fmt.Fprintf(os.Stderr, "DBG handleFromlist import %q err=%v\n", fromName, ierr) - } // Backwards-compatibility: ignore a fromlist-triggered import // of a submodule that simply does not exist, but only when the // miss is for exactly this submodule. From 093146db71293b728452c81786b227a66fbfa837 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 18:41:05 +0700 Subject: [PATCH 46/84] os: port _path_splitroot for the Windows import bootstrap importlib._bootstrap_external reimplements os.path.join and os.path.isabs on Windows with nt._path_splitroot, so the path-based finder cannot start without it. Port the posixmodule.c accelerator following ntpath.splitroot and register it only on Windows, matching the #ifdef MS_WINDOWS gate. Also consume an EXTENDED_ARG prefix that surfaces from the dispatch loop when an instrumented line resolves back to a prefixed instruction, so traced code with wide args no longer trips the not-implemented path. --- module/os/module.go | 2 +- module/os/posix_unix.go | 12 ++++ module/os/posix_windows.go | 139 +++++++++++++++++++++++++++++++++++++ vm/dispatch.go | 28 ++++++++ 4 files changed, 180 insertions(+), 1 deletion(-) diff --git a/module/os/module.go b/module/os/module.go index 2d4b9de5..93740f9b 100644 --- a/module/os/module.go +++ b/module/os/module.go @@ -449,7 +449,7 @@ func buildOS() (*objects.Module, error) { for _, group := range [][]struct { name string val objects.Object - }{entries, posixIdentityEntries()} { + }{entries, posixIdentityEntries(), winPathEntries()} { for _, e := range group { if err := d.SetItem(objects.NewStr(e.name), e.val); err != nil { return nil, err diff --git a/module/os/posix_unix.go b/module/os/posix_unix.go index f427a071..d8e9a868 100644 --- a/module/os/posix_unix.go +++ b/module/os/posix_unix.go @@ -280,3 +280,15 @@ func posixIdentityEntries() []struct { {"getgroups", objects.NewBuiltinFunction("getgroups", osGetgroups)}, } } + +// winPathEntries is empty on POSIX: posixmodule.c registers _path_splitroot +// and the listdrives family only inside its #ifdef MS_WINDOWS block, so on +// POSIX os._path_splitroot raises AttributeError just like CPython. +// +// CPython: Modules/posixmodule.c:4707 #ifdef MS_WINDOWS +func winPathEntries() []struct { + name string + val objects.Object +} { + return nil +} diff --git a/module/os/posix_windows.go b/module/os/posix_windows.go index 189fe8b5..d78f4c43 100644 --- a/module/os/posix_windows.go +++ b/module/os/posix_windows.go @@ -289,3 +289,142 @@ func osUmask(args []objects.Object, _ map[string]objects.Object) (objects.Object } return objects.NewInt(0), nil } + +// winPathEntries returns the Windows-only path helpers posixmodule.c registers +// inside its #ifdef MS_WINDOWS block. Only _path_splitroot is needed by the +// stdlib bootstrap; the rest of the listdrives/_path_* family is unported. +// +// CPython: Modules/posixmodule.c:4707 #ifdef MS_WINDOWS +func winPathEntries() []struct { + name string + val objects.Object +} { + return []struct { + name string + val objects.Object + }{ + {"_path_splitroot", objects.NewBuiltinFunction("_path_splitroot", osPathSplitroot)}, + } +} + +// osPathSplitroot splits a Windows path into (root, rest), where root is +// everything up to and including the leading separator after a drive or UNC +// share. importlib._bootstrap_external uses it to reimplement os.path.join and +// os.path.isabs without importing ntpath at bootstrap time. +// +// The C accelerator runs PathCchSkipRoot over a copy with forward slashes +// folded to backslashes, then slices the original (unfolded) path at the root +// length. That is exactly the drive+root prefix ntpath.splitroot computes, so +// this port follows the ntpath.splitroot algorithm and joins its (drive, root) +// halves into the single root element the 2-tuple form returns. +// +// CPython: Modules/posixmodule.c:5230 os__path_splitroot_impl +// CPython: Lib/ntpath.py:172 splitroot +func osPathSplitroot(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: _path_splitroot() takes exactly one argument (%d given)", len(args)) + } + s, err := objects.Str(args[0]) + if err != nil { + return nil, err + } + root, rest := splitrootWindows(s) + return objects.NewTuple([]objects.Object{objects.NewStr(root), objects.NewStr(rest)}), nil +} + +// splitrootWindows is the ntpath.splitroot algorithm folded to the 2-tuple +// (drive+root, tail) shape os._path_splitroot returns. It indexes by rune to +// preserve Python str (code-point) slicing semantics. +// +// CPython: Lib/ntpath.py:172 splitroot +func splitrootWindows(p string) (root, tail string) { + const ( + sep = '\\' + alt = '/' + colon = ':' + ) + r := []rune(p) + n := len(r) + // normp = p.replace('/', '\\'); only used for the structural tests. + at := func(i int) rune { + if i < 0 || i >= n { + return 0 + } + c := r[i] + if c == alt { + return sep + } + return c + } + slice := func(a, b int) string { + if a < 0 { + a = 0 + } + if b > n { + b = n + } + if a >= b { + return "" + } + return string(r[a:b]) + } + // normp.find(sep, start) over the slash-folded view. + findSep := func(start int) int { + for i := start; i < n; i++ { + if at(i) == sep { + return i + } + } + return -1 + } + uncPrefixUpper := func() bool { + // normp[:8].upper() == '\\\\?\\UNC\\' + want := []rune{sep, sep, '?', sep, 'U', 'N', 'C', sep} + if n < 8 { + return false + } + for i := 0; i < 8; i++ { + c := at(i) + if c >= 'a' && c <= 'z' { + c -= 'a' - 'A' + } + if c != want[i] { + return false + } + } + return true + } + + switch { + case at(0) == sep: + if at(1) == sep { + // UNC or device drive, e.g. \\server\share or \\?\UNC\server\share. + start := 2 + if uncPrefixUpper() { + start = 8 + } + index := findSep(start) + if index == -1 { + return p, "" + } + index2 := findSep(index + 1) + if index2 == -1 { + return p, "" + } + // drive=p[:index2], root=p[index2:index2+1], tail=p[index2+1:]. + return slice(0, index2+1), slice(index2+1, n) + } + // Relative path with root, e.g. \Windows: drive="", root=p[:1]. + return slice(0, 1), slice(1, n) + case at(1) == colon: + if at(2) == sep { + // Absolute drive-letter path, e.g. X:\Windows. + return slice(0, 3), slice(3, n) + } + // Relative path with drive, e.g. X:Windows: drive=p[:2], root="". + return slice(0, 2), slice(2, n) + default: + // Relative path, e.g. Windows. + return "", p + } +} diff --git a/vm/dispatch.go b/vm/dispatch.go index f96604ae..55b3337f 100644 --- a/vm/dispatch.go +++ b/vm/dispatch.go @@ -66,6 +66,34 @@ func (e *evalState) dispatch(op compile.Opcode, oparg uint32) (next int, err err op = instrumentedToBase[op] } afterInstrument: + // EXTENDED_ARG never reaches dispatch from the straight-line fetch + // path (fetch consumes the prefix run and hands dispatch the trailing + // real opcode). It only lands here when the instrumented-line handler + // above resolved INSTRUMENTED_LINE back to an original EXTENDED_ARG: + // the line started on a prefixed instruction. Consume the prefix the + // way fetch would, then dispatch the real opcode with the accumulated + // arg. fetchExtended scans forward from the byte after the instrumented + // slot, so it reads the un-shadowed trailing opcodes. + // + // CPython: Python/ceval.c TARGET(EXTENDED_ARG) + if op == compile.EXTENDED_ARG { + realOp, realArg, ok := e.fetchExtended(e.f.InstrPtr, oparg) + if !ok { + return 0, opcodeNotImplemented(op) + } + op, oparg = realOp, realArg + // The trailing real opcode may itself be instrumented (the jump or + // call the prefix feeds is a monitored site), and the top + // instrumentation block already ran for the EXTENDED_ARG slot. Fire + // its event and rebase here, mirroring CPython dispatching from + // TARGET(EXTENDED_ARG) straight into TARGET(INSTRUMENTED_*). + if instrumentedRewrite[op] { + if err := e.fireInstrumented(op, oparg); err != nil { + return 0, err + } + op = instrumentedToBase[op] + } + } // Specializer routing: only Quickened code carries inline-cache // counters and specialized variants; non-Quickened code (raw // compile output before specialize.Quicken) skips the entire From b093f9d245e59f02607c7a570e6bd772b845892f Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 18:47:37 +0700 Subject: [PATCH 47/84] vm,os: lift splitroot helpers and instrumentation preamble out of line Keeps golangci-lint happy: the EXTENDED_ARG handling moved into applyInstrumentation / resolveExtendedArgPrefix so dispatch stays under the cyclomatic-complexity limit, and the ntpath.splitroot port uses package-level helpers instead of nested closures. --- module/os/posix_windows.go | 164 +++++++++++++++++++------------------ vm/dispatch.go | 114 ++++++++++++++------------ 2 files changed, 148 insertions(+), 130 deletions(-) diff --git a/module/os/posix_windows.go b/module/os/posix_windows.go index d78f4c43..89185022 100644 --- a/module/os/posix_windows.go +++ b/module/os/posix_windows.go @@ -332,97 +332,105 @@ func osPathSplitroot(args []objects.Object, _ map[string]objects.Object) (object return objects.NewTuple([]objects.Object{objects.NewStr(root), objects.NewStr(rest)}), nil } -// splitrootWindows is the ntpath.splitroot algorithm folded to the 2-tuple -// (drive+root, tail) shape os._path_splitroot returns. It indexes by rune to -// preserve Python str (code-point) slicing semantics. -// -// CPython: Lib/ntpath.py:172 splitroot -func splitrootWindows(p string) (root, tail string) { - const ( - sep = '\\' - alt = '/' - colon = ':' - ) - r := []rune(p) - n := len(r) - // normp = p.replace('/', '\\'); only used for the structural tests. - at := func(i int) rune { - if i < 0 || i >= n { - return 0 - } - c := r[i] - if c == alt { - return sep - } - return c +const ( + srSep = '\\' + srAlt = '/' + srColon = ':' +) + +// srAt reads the slash-folded rune at index i (out-of-range yields 0), so the +// structural tests run over the normp = p.replace('/', '\\') view. +func srAt(r []rune, i int) rune { + if i < 0 || i >= len(r) { + return 0 } - slice := func(a, b int) string { - if a < 0 { - a = 0 - } - if b > n { - b = n - } - if a >= b { - return "" - } - return string(r[a:b]) - } - // normp.find(sep, start) over the slash-folded view. - findSep := func(start int) int { - for i := start; i < n; i++ { - if at(i) == sep { - return i - } + if r[i] == srAlt { + return srSep + } + return r[i] +} + +// srSlice returns string(r[a:b]) clamped to bounds, the Python p[a:b] slice. +func srSlice(r []rune, a, b int) string { + if a < 0 { + a = 0 + } + if b > len(r) { + b = len(r) + } + if a >= b { + return "" + } + return string(r[a:b]) +} + +// srFindSep is normp.find('\\', start) over the slash-folded view. +func srFindSep(r []rune, start int) int { + for i := start; i < len(r); i++ { + if srAt(r, i) == srSep { + return i } - return -1 } - uncPrefixUpper := func() bool { - // normp[:8].upper() == '\\\\?\\UNC\\' - want := []rune{sep, sep, '?', sep, 'U', 'N', 'C', sep} - if n < 8 { - return false + return -1 +} + +// srHasUNCPrefix reports normp[:8].upper() == '\\\\?\\UNC\\'. +func srHasUNCPrefix(r []rune) bool { + want := [8]rune{srSep, srSep, '?', srSep, 'U', 'N', 'C', srSep} + if len(r) < 8 { + return false + } + for i := 0; i < 8; i++ { + c := srAt(r, i) + if c >= 'a' && c <= 'z' { + c -= 'a' - 'A' } - for i := 0; i < 8; i++ { - c := at(i) - if c >= 'a' && c <= 'z' { - c -= 'a' - 'A' - } - if c != want[i] { - return false - } + if c != want[i] { + return false } - return true } + return true +} +// srSplitUNC handles \\server\share or \\?\UNC\server\share roots. +func srSplitUNC(p string, r []rune) (string, string) { + start := 2 + if srHasUNCPrefix(r) { + start = 8 + } + index := srFindSep(r, start) + if index == -1 { + return p, "" + } + index2 := srFindSep(r, index+1) + if index2 == -1 { + return p, "" + } + // drive=p[:index2], root=p[index2:index2+1], tail=p[index2+1:]. + return srSlice(r, 0, index2+1), srSlice(r, index2+1, len(r)) +} + +// splitrootWindows is the ntpath.splitroot algorithm folded to the 2-tuple +// (drive+root, tail) shape os._path_splitroot returns. It indexes by rune to +// preserve Python str (code-point) slicing semantics. +// +// CPython: Lib/ntpath.py:172 splitroot +func splitrootWindows(p string) (root, tail string) { + r := []rune(p) switch { - case at(0) == sep: - if at(1) == sep { - // UNC or device drive, e.g. \\server\share or \\?\UNC\server\share. - start := 2 - if uncPrefixUpper() { - start = 8 - } - index := findSep(start) - if index == -1 { - return p, "" - } - index2 := findSep(index + 1) - if index2 == -1 { - return p, "" - } - // drive=p[:index2], root=p[index2:index2+1], tail=p[index2+1:]. - return slice(0, index2+1), slice(index2+1, n) + case srAt(r, 0) == srSep: + if srAt(r, 1) == srSep { + return srSplitUNC(p, r) } // Relative path with root, e.g. \Windows: drive="", root=p[:1]. - return slice(0, 1), slice(1, n) - case at(1) == colon: - if at(2) == sep { + return srSlice(r, 0, 1), srSlice(r, 1, len(r)) + case srAt(r, 1) == srColon: + if srAt(r, 2) == srSep { // Absolute drive-letter path, e.g. X:\Windows. - return slice(0, 3), slice(3, n) + return srSlice(r, 0, 3), srSlice(r, 3, len(r)) } // Relative path with drive, e.g. X:Windows: drive=p[:2], root="". - return slice(0, 2), slice(2, n) + return srSlice(r, 0, 2), srSlice(r, 2, len(r)) default: // Relative path, e.g. Windows. return "", p diff --git a/vm/dispatch.go b/vm/dispatch.go index 55b3337f..197b1645 100644 --- a/vm/dispatch.go +++ b/vm/dispatch.go @@ -29,8 +29,6 @@ import ( // - otherwise: the loop sets InstrPtr = next and continues. // // CPython: Python/ceval.c switch over op -// -//nolint:gocognit // mirrors CPython's ceval.c per-opcode dispatch; complexity is the surface, not algorithmic branching func (e *evalState) dispatch(op compile.Opcode, oparg uint32) (next int, err error) { // CPython: Python/ceval_macros.h:63 INSTRUCTION_STATS. Bumps the // per-opcode counter + pair counter before any specializer / fast @@ -38,61 +36,18 @@ func (e *evalState) dispatch(op compile.Opcode, oparg uint32) (next int, err err // INSTRUCTION_STATS(op) just before the TARGET label). e.recordOpcode(op) // Instrumentation routing: the common case (op is not an - // INSTRUMENTED_ variant) bails on a single [256]bool load. Only - // when op is one of the 21 INSTRUMENTED_ opcodes do we route - // through the LINE handler / PEP 669 callback fire / base-rewrite - // sequence. Pre-D1, monitor.IsInstrumented was called for every - // dispatch and burned ~6% of CPU on the tight bench just on the - // non-instrumented path. + // INSTRUMENTED_ variant) bails on a single [256]bool load inside + // applyInstrumentation. Only when op is one of the 21 INSTRUMENTED_ + // opcodes do we route through the LINE handler / PEP 669 callback fire + // / base-rewrite / EXTENDED_ARG-prefix sequence. // // CPython: Python/ceval.c TARGET(INSTRUMENTED_*) labels are // reached directly via the computed-goto table, so the // non-instrumented path costs zero. Mirrored here by the // instrumentedRewrite gate. - if instrumentedRewrite[op] { - if op == compile.INSTRUMENTED_LINE { - newOp, err := e.handleInstrumentedLine() - if err != nil { - return 0, err - } - op = newOp - if !instrumentedRewrite[op] { - goto afterInstrument - } - } - if err := e.fireInstrumented(op, oparg); err != nil { - return 0, err - } - op = instrumentedToBase[op] - } -afterInstrument: - // EXTENDED_ARG never reaches dispatch from the straight-line fetch - // path (fetch consumes the prefix run and hands dispatch the trailing - // real opcode). It only lands here when the instrumented-line handler - // above resolved INSTRUMENTED_LINE back to an original EXTENDED_ARG: - // the line started on a prefixed instruction. Consume the prefix the - // way fetch would, then dispatch the real opcode with the accumulated - // arg. fetchExtended scans forward from the byte after the instrumented - // slot, so it reads the un-shadowed trailing opcodes. - // - // CPython: Python/ceval.c TARGET(EXTENDED_ARG) - if op == compile.EXTENDED_ARG { - realOp, realArg, ok := e.fetchExtended(e.f.InstrPtr, oparg) - if !ok { - return 0, opcodeNotImplemented(op) - } - op, oparg = realOp, realArg - // The trailing real opcode may itself be instrumented (the jump or - // call the prefix feeds is a monitored site), and the top - // instrumentation block already ran for the EXTENDED_ARG slot. Fire - // its event and rebase here, mirroring CPython dispatching from - // TARGET(EXTENDED_ARG) straight into TARGET(INSTRUMENTED_*). - if instrumentedRewrite[op] { - if err := e.fireInstrumented(op, oparg); err != nil { - return 0, err - } - op = instrumentedToBase[op] - } + op, oparg, err = e.applyInstrumentation(op, oparg) + if err != nil { + return 0, err } // Specializer routing: only Quickened code carries inline-cache // counters and specialized variants; non-Quickened code (raw @@ -175,6 +130,61 @@ afterInstrument: return 0, opcodeNotImplemented(op) } +// applyInstrumentation runs the INSTRUMENTED_ routing for op (LINE handler, +// PEP 669 callback fire, base rewrite) and then resolves any EXTENDED_ARG +// prefix the rewrite exposed, returning the real opcode and accumulated arg the +// generic dispatch body should run. The non-instrumented path is a single +// [256]bool load plus the EXTENDED_ARG fast-out. +// +// CPython: Python/ceval.c TARGET(INSTRUMENTED_*) +func (e *evalState) applyInstrumentation(op compile.Opcode, oparg uint32) (compile.Opcode, uint32, error) { + if instrumentedRewrite[op] { + if op == compile.INSTRUMENTED_LINE { + newOp, err := e.handleInstrumentedLine() + if err != nil { + return 0, 0, err + } + op = newOp + if !instrumentedRewrite[op] { + return e.resolveExtendedArgPrefix(op, oparg) + } + } + if err := e.fireInstrumented(op, oparg); err != nil { + return 0, 0, err + } + op = instrumentedToBase[op] + } + return e.resolveExtendedArgPrefix(op, oparg) +} + +// resolveExtendedArgPrefix consumes an EXTENDED_ARG prefix that surfaced from +// the instrumented-line handler (the line started on a prefixed instruction) +// and returns the trailing real opcode and accumulated arg; for any other +// opcode it is a pass-through. EXTENDED_ARG never reaches here from the +// straight-line fetch path, which consumes the prefix run before dispatch. The +// trailing opcode may itself be instrumented (the jump or call the prefix feeds +// is a monitored site), and the instrumentation block already ran for the +// EXTENDED_ARG slot, so its event is fired and rebased here. This mirrors +// CPython dispatching from TARGET(EXTENDED_ARG) straight into TARGET(INSTRUMENTED_*). +// +// CPython: Python/ceval.c TARGET(EXTENDED_ARG) +func (e *evalState) resolveExtendedArgPrefix(op compile.Opcode, oparg uint32) (compile.Opcode, uint32, error) { + if op != compile.EXTENDED_ARG { + return op, oparg, nil + } + realOp, realArg, ok := e.fetchExtended(e.f.InstrPtr, oparg) + if !ok { + return 0, 0, opcodeNotImplemented(compile.EXTENDED_ARG) + } + if instrumentedRewrite[realOp] { + if err := e.fireInstrumented(realOp, realArg); err != nil { + return 0, 0, err + } + realOp = instrumentedToBase[realOp] + } + return realOp, realArg, nil +} + // opcodeNotImplemented wraps ErrNotImplemented with the offending op. func opcodeNotImplemented(op compile.Opcode) error { return ¬Implemented{op: op} From c1ef53050828ce74260ff6ac0332839cc80232d1 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 19:00:09 +0700 Subject: [PATCH 48/84] sys: expose winver on Windows so site can build the user path site._get_path reads sys.winver under os.name == 'nt' to assemble the per-user site-packages directory, and the preload of site runs before any user code, so the attribute has to exist on Windows. Set it to the major.minor DLL id string the way sysmodule does. --- module/sys/sys.go | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/module/sys/sys.go b/module/sys/sys.go index 46cfd18f..196c0e62 100644 --- a/module/sys/sys.go +++ b/module/sys/sys.go @@ -17,6 +17,7 @@ package sys import ( "fmt" + "runtime" "sort" "strconv" @@ -54,6 +55,18 @@ func Init() (*objects.Dict, error) { if err := setStr(d, "float_repr_style", "short"); err != nil { return nil, err } + // sys.winver is the Windows-only DLL version string (MS_DLL_ID, the + // major.minor "3.14"). site._get_path reads it to build the per-user + // site-packages path under os.name == 'nt', so the bootstrap needs it + // before site runs. CPython sets it only on Windows. + // + // CPython: Python/sysmodule.c:3869 SET_SYS_FROM_STRING("winver", PyWin_DLLVersionString) + if runtime.GOOS == "windows" { + winver := strconv.Itoa(build.PythonMajorVersion) + "." + strconv.Itoa(build.PythonMinorVersion) + if err := setStr(d, "winver", winver); err != nil { + return nil, err + } + } if err := setInt(d, "hexversion", hexVersion()); err != nil { return nil, err From 5d21ff69d95e24ed7d107732dd1d700727002f8e Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 19:21:00 +0700 Subject: [PATCH 49/84] TEMP DEBUG: probe Windows flat-module import at boot --- cmd/gopy/main.go | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 50e331fb..980965ec 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -400,6 +400,32 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File fmt.Fprintln(stderr, "preload encodings:", err) return 1 } + // TEMP DEBUG (revert): probe flat-module import on Windows to capture why + // io/dis fail post-boot while packages like encodings load fine. + probe := "import sys\n" + + "if sys.platform == 'win32':\n" + + " import nt\n" + + " sys.stderr.write('IMPDBG path=%r\\n' % (list(sys.path),))\n" + + " sys.stderr.write('IMPDBG meta=%r\\n' % ([getattr(m,'__name__',m) for m in sys.meta_path],))\n" + + " sys.stderr.write('IMPDBG hooks=%r\\n' % (sys.path_hooks,))\n" + + " for _e in sys.path:\n" + + " try: _c = nt.listdir(_e or '.')\n" + + " except Exception as _x:\n" + + " sys.stderr.write('IMPDBG listdir %r ERR %r\\n' % (_e, _x)); continue\n" + + " if 'dis.py' in _c:\n" + + " sys.stderr.write('IMPDBG found dis.py in %r; hasio=%r\\n' % (_e, 'io.py' in _c))\n" + + " _ff = sys.path_importer_cache.get(_e)\n" + + " sys.stderr.write('IMPDBG finder=%r cache=%r\\n' % (_ff, getattr(_ff,'_path_cache',None)))\n" + + " from importlib.machinery import PathFinder as _PF\n" + + " sys.stderr.write('IMPDBG dis spec=%r\\n' % (_PF.find_spec('dis'),))\n" + + " try:\n" + + " import dis\n" + + " sys.stderr.write('IMPDBG import dis OK %r\\n' % (getattr(dis,'__file__',None),))\n" + + " except Exception as _x:\n" + + " import traceback; sys.stderr.write('IMPDBG import dis FAIL %r\\n' % (_x,)); traceback.print_exc()\n" + if _, err := pythonrun.RunString(ts, probe, "", parser.ModeFile, globals, nil); err != nil { + fmt.Fprintln(stderr, "IMPDBG probe error:", err) + } return 0 } From d4bd63be62e138a39edc83b932759a8e752cff14 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 19:36:34 +0700 Subject: [PATCH 50/84] debug: move Windows import probe to post-site gate context --- cmd/gopy/main.go | 50 +++++++++++++++++++++++------------------------- 1 file changed, 24 insertions(+), 26 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 980965ec..17eddff1 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -400,32 +400,6 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File fmt.Fprintln(stderr, "preload encodings:", err) return 1 } - // TEMP DEBUG (revert): probe flat-module import on Windows to capture why - // io/dis fail post-boot while packages like encodings load fine. - probe := "import sys\n" + - "if sys.platform == 'win32':\n" + - " import nt\n" + - " sys.stderr.write('IMPDBG path=%r\\n' % (list(sys.path),))\n" + - " sys.stderr.write('IMPDBG meta=%r\\n' % ([getattr(m,'__name__',m) for m in sys.meta_path],))\n" + - " sys.stderr.write('IMPDBG hooks=%r\\n' % (sys.path_hooks,))\n" + - " for _e in sys.path:\n" + - " try: _c = nt.listdir(_e or '.')\n" + - " except Exception as _x:\n" + - " sys.stderr.write('IMPDBG listdir %r ERR %r\\n' % (_e, _x)); continue\n" + - " if 'dis.py' in _c:\n" + - " sys.stderr.write('IMPDBG found dis.py in %r; hasio=%r\\n' % (_e, 'io.py' in _c))\n" + - " _ff = sys.path_importer_cache.get(_e)\n" + - " sys.stderr.write('IMPDBG finder=%r cache=%r\\n' % (_ff, getattr(_ff,'_path_cache',None)))\n" + - " from importlib.machinery import PathFinder as _PF\n" + - " sys.stderr.write('IMPDBG dis spec=%r\\n' % (_PF.find_spec('dis'),))\n" + - " try:\n" + - " import dis\n" + - " sys.stderr.write('IMPDBG import dis OK %r\\n' % (getattr(dis,'__file__',None),))\n" + - " except Exception as _x:\n" + - " import traceback; sys.stderr.write('IMPDBG import dis FAIL %r\\n' % (_x,)); traceback.print_exc()\n" - if _, err := pythonrun.RunString(ts, probe, "", parser.ModeFile, globals, nil); err != nil { - fmt.Fprintln(stderr, "IMPDBG probe error:", err) - } return 0 } @@ -690,6 +664,30 @@ func runFile(path string, stdout, stderr *os.File) int { return rc } prependSysPath0() + // TEMP DEBUG (revert): probe flat-module import on Windows after site + + // prependSysPath0, the exact state the gate script's `import io` sees. + { + probe := "import sys\n" + + "if sys.platform == 'win32':\n" + + " import nt\n" + + " sys.stderr.write('IMPDBG2 path=%r\\n' % (list(sys.path),))\n" + + " sys.stderr.write('IMPDBG2 cache=%r\\n' % (list(sys.path_importer_cache),))\n" + + " for _e in list(sys.path):\n" + + " try: _c = nt.listdir(_e or '.')\n" + + " except Exception as _x:\n" + + " sys.stderr.write('IMPDBG2 listdir %r ERR %r\\n' % (_e, _x)); continue\n" + + " sys.stderr.write('IMPDBG2 entry %r hasio=%r finder=%r\\n' % (_e, 'io.py' in _c, sys.path_importer_cache.get(_e)))\n" + + " from importlib.machinery import PathFinder as _PF\n" + + " sys.stderr.write('IMPDBG2 io spec=%r\\n' % (_PF.find_spec('io'),))\n" + + " try:\n" + + " import io\n" + + " sys.stderr.write('IMPDBG2 import io OK %r\\n' % (getattr(io,'__file__',None),))\n" + + " except Exception as _x:\n" + + " import traceback; sys.stderr.write('IMPDBG2 import io FAIL %r\\n' % (_x,)); traceback.print_exc()\n" + if _, err := pythonrun.RunString(ts, probe, "", parser.ModeFile, mainGlobals, nil); err != nil { + fmt.Fprintln(stderr, "IMPDBG2 probe error:", err) + } + } // A vendored test runs under "test."; regrtest imports it as a // normal module, so its __spec__ is a real ModuleSpec. Build the same // file-location spec here so code that resolves the module by name and From 6840b14d6554418da365de2a648265db3d604768 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 19:49:34 +0700 Subject: [PATCH 51/84] os: register posixmodule under one platform name (nt on Windows, posix elsewhere) Lib/os.py picks ntpath vs posixpath by testing which name is in sys.builtin_module_names. gopy registered 'posix' unconditionally and also 'nt' on Windows, so os.path resolved to posixpath on Windows and mangled drive-absolute paths (site.removeduppaths turned the stdlib entry into cwd + '/' + path, dropping it from sys.path). Match CPython, which compiles posixmodule.c under a single MODNAME per platform. --- cmd/gopy/main.go | 24 ------------------------ module/os/module.go | 22 +++++++++++++++++----- 2 files changed, 17 insertions(+), 29 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 17eddff1..50e331fb 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -664,30 +664,6 @@ func runFile(path string, stdout, stderr *os.File) int { return rc } prependSysPath0() - // TEMP DEBUG (revert): probe flat-module import on Windows after site + - // prependSysPath0, the exact state the gate script's `import io` sees. - { - probe := "import sys\n" + - "if sys.platform == 'win32':\n" + - " import nt\n" + - " sys.stderr.write('IMPDBG2 path=%r\\n' % (list(sys.path),))\n" + - " sys.stderr.write('IMPDBG2 cache=%r\\n' % (list(sys.path_importer_cache),))\n" + - " for _e in list(sys.path):\n" + - " try: _c = nt.listdir(_e or '.')\n" + - " except Exception as _x:\n" + - " sys.stderr.write('IMPDBG2 listdir %r ERR %r\\n' % (_e, _x)); continue\n" + - " sys.stderr.write('IMPDBG2 entry %r hasio=%r finder=%r\\n' % (_e, 'io.py' in _c, sys.path_importer_cache.get(_e)))\n" + - " from importlib.machinery import PathFinder as _PF\n" + - " sys.stderr.write('IMPDBG2 io spec=%r\\n' % (_PF.find_spec('io'),))\n" + - " try:\n" + - " import io\n" + - " sys.stderr.write('IMPDBG2 import io OK %r\\n' % (getattr(io,'__file__',None),))\n" + - " except Exception as _x:\n" + - " import traceback; sys.stderr.write('IMPDBG2 import io FAIL %r\\n' % (_x,)); traceback.print_exc()\n" - if _, err := pythonrun.RunString(ts, probe, "", parser.ModeFile, mainGlobals, nil); err != nil { - fmt.Fprintln(stderr, "IMPDBG2 probe error:", err) - } - } // A vendored test runs under "test."; regrtest imports it as a // normal module, so its __spec__ is a real ModuleSpec. Build the same // file-location spec here so code that resolves the module by name and diff --git a/module/os/module.go b/module/os/module.go index 93740f9b..8b156af3 100644 --- a/module/os/module.go +++ b/module/os/module.go @@ -206,12 +206,18 @@ func osTimes(_ []objects.Object, _ map[string]objects.Object) (objects.Object, e } func init() { - _ = imp.AppendInittab("posix", buildPosixModule) - // On Windows, Lib/os.py does `from nt import *`; register the same - // syscall surface under the "nt" name so `import nt` resolves. - // CPython: Modules/posixmodule.c posixmodule_init (registers as "nt" on Windows) + // CPython compiles posixmodule.c under a single name per platform: "nt" + // on Windows, "posix" everywhere else (Modules/posixmodule.c builds with + // MODNAME = "nt" when MS_WINDOWS). Lib/os.py then selects ntpath vs + // posixpath by testing which name is in sys.builtin_module_names, so + // registering both on Windows makes os.py pick posixpath and mangle + // drive-absolute paths. Mirror CPython: one name, gated on the platform. + // + // CPython: Modules/posixmodule.c posixmodule_init (MODNAME "nt" on Windows) if runtime.GOOS == "windows" { _ = imp.AppendInittab("nt", buildPosixModule) + } else { + _ = imp.AppendInittab("posix", buildPosixModule) } _ = imp.AppendInittab("os.path", buildOSPath) // posixpath and ntpath now load from stdlib/ via PathFinder. @@ -228,7 +234,13 @@ func buildPosixModule() (*objects.Module, error) { if err != nil { return nil, err } - posix := objects.NewModule("posix") + // The compiled module is named "nt" on Windows, "posix" elsewhere, + // matching the single MODNAME CPython's posixmodule.c builds with. + modName := "posix" + if runtime.GOOS == "windows" { + modName = "nt" + } + posix := objects.NewModule(modName) pd := posix.Dict() md := m.Dict() for _, k := range md.Keys() { From 00b576d628595c9f634b001bc9b28e8eb969a2c6 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 20:07:14 +0700 Subject: [PATCH 52/84] os: translate Windows error codes to POSIX errno for OSError On Windows, Go's syscall.Errno carries the raw WinAPI error code (e.g. ERROR_ALREADY_EXISTS 183), not a POSIX errno. The OSError synthesizer keyed exc.errno on that raw value, so errnomap never promoted to the right subclass and `except FileExistsError` slipped past, e.g. in py_compile.makedirs over an existing __pycache__. Port PC/errmap.h winerror_to_errno and route buildOSErrorFromGo and promoteOSErrorByErrno through it. No-op on non-Windows. --- vm/eval_unwind.go | 10 +-- vm/oserrno_other.go | 7 ++ vm/oserrno_windows.go | 159 ++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 171 insertions(+), 5 deletions(-) create mode 100644 vm/oserrno_other.go create mode 100644 vm/oserrno_windows.go diff --git a/vm/eval_unwind.go b/vm/eval_unwind.go index ba40d9c8..cb424ef0 100644 --- a/vm/eval_unwind.go +++ b/vm/eval_unwind.go @@ -309,7 +309,7 @@ func buildOSErrorFromGo(err error) *pyerrors.Exception { if errno == 0 { return nil } - return pyerrors.NewOSError(int(errno), strerrorString(errno), filename, filename2) + return pyerrors.NewOSError(winerrorToErrno(int(errno)), strerrorString(errno), filename, filename2) } // strerrorString renders the errno's message the way CPython's @@ -346,26 +346,26 @@ func promoteOSErrorByErrno(typ *objects.Type, err error) *objects.Type { if errors.As(err, &pathErr) { var errno syscall.Errno if errors.As(pathErr.Err, &errno) { - return pyerrors.ErrnoSubclass(int(errno)) + return pyerrors.ErrnoSubclass(winerrorToErrno(int(errno))) } } var linkErr *os.LinkError if errors.As(err, &linkErr) { var errno syscall.Errno if errors.As(linkErr.Err, &errno) { - return pyerrors.ErrnoSubclass(int(errno)) + return pyerrors.ErrnoSubclass(winerrorToErrno(int(errno))) } } var sysErr *os.SyscallError if errors.As(err, &sysErr) { var errno syscall.Errno if errors.As(sysErr.Err, &errno) { - return pyerrors.ErrnoSubclass(int(errno)) + return pyerrors.ErrnoSubclass(winerrorToErrno(int(errno))) } } var errno syscall.Errno if errors.As(err, &errno) { - return pyerrors.ErrnoSubclass(int(errno)) + return pyerrors.ErrnoSubclass(winerrorToErrno(int(errno))) } return typ } diff --git a/vm/oserrno_other.go b/vm/oserrno_other.go new file mode 100644 index 00000000..85015512 --- /dev/null +++ b/vm/oserrno_other.go @@ -0,0 +1,7 @@ +//go:build !windows + +package vm + +// winerrorToErrno is the identity on non-Windows platforms: Go's +// syscall.Errno already carries the POSIX errno there. +func winerrorToErrno(errno int) int { return errno } diff --git a/vm/oserrno_windows.go b/vm/oserrno_windows.go new file mode 100644 index 00000000..453869a4 --- /dev/null +++ b/vm/oserrno_windows.go @@ -0,0 +1,159 @@ +//go:build windows + +package vm + +// winerrorToErrno maps a Windows system error code to the POSIX errno +// CPython stores in OSError.errno (OSError.winerror keeps the raw code). +// Go's syscall.Errno on Windows carries the raw WinAPI error, so without +// this translation `except FileNotFoundError` / `except FileExistsError` +// would never match (errnomap is keyed on POSIX errno). +// +// CPython: PC/errmap.h winerror_to_errno +func winerrorToErrno(winerror int) int { + // Unwrap FACILITY_WIN32 HRESULT errors. + if winerror&0xFFFF0000 == 0x80070000 { + winerror &= 0x0000FFFF + } + + // Winsock error codes (10000-11999) are errno values. + if winerror >= 10000 && winerror < 12000 { + switch winerror { + case 10004, // WSAEINTR + 10009, // WSAEBADF + 10013, // WSAEACCES + 10014, // WSAEFAULT + 10022, // WSAEINVAL + 10024: // WSAEMFILE + return winerror - 10000 + default: + return winerror + } + } + + switch winerror { + case 2, // ERROR_FILE_NOT_FOUND + 3, // ERROR_PATH_NOT_FOUND + 15, // ERROR_INVALID_DRIVE + 18, // ERROR_NO_MORE_FILES + 53, // ERROR_BAD_NETPATH + 67, // ERROR_BAD_NET_NAME + 161, // ERROR_BAD_PATHNAME + 206: // ERROR_FILENAME_EXCED_RANGE + return errENOENT + case 10: // ERROR_BAD_ENVIRONMENT + return errE2BIG + case 11, // ERROR_BAD_FORMAT + 188, // ERROR_INVALID_STARTING_CODESEG + 189, // ERROR_INVALID_STACKSEG + 190, // ERROR_INVALID_MODULETYPE + 191, // ERROR_INVALID_EXE_SIGNATURE + 192, // ERROR_EXE_MARKED_INVALID + 193, // ERROR_BAD_EXE_FORMAT + 194, // ERROR_ITERATED_DATA_EXCEEDS_64k + 195, // ERROR_INVALID_MINALLOCSIZE + 196, // ERROR_DYNLINK_FROM_INVALID_RING + 197, // ERROR_IOPL_NOT_ENABLED + 198, // ERROR_INVALID_SEGDPL + 199, // ERROR_AUTODATASEG_EXCEEDS_64k + 200, // ERROR_RING2SEG_MUST_BE_MOVABLE + 201, // ERROR_RELOC_CHAIN_XEEDS_SEGLIM + 202: // ERROR_INFLOOP_IN_RELOC_CHAIN + return errENOEXEC + case 6, // ERROR_INVALID_HANDLE + 114, // ERROR_INVALID_TARGET_HANDLE + 130: // ERROR_DIRECT_ACCESS_HANDLE + return errEBADF + case 128, // ERROR_WAIT_NO_CHILDREN + 129: // ERROR_CHILD_NOT_COMPLETE + return errECHILD + case 89, // ERROR_NO_PROC_SLOTS + 164, // ERROR_MAX_THRDS_REACHED + 215: // ERROR_NESTING_NOT_ALLOWED + return errEAGAIN + case 7, // ERROR_ARENA_TRASHED + 8, // ERROR_NOT_ENOUGH_MEMORY + 9, // ERROR_INVALID_BLOCK + 1816: // ERROR_NOT_ENOUGH_QUOTA + return errENOMEM + case 5, // ERROR_ACCESS_DENIED + 16, // ERROR_CURRENT_DIRECTORY + 19, // ERROR_WRITE_PROTECT + 20, // ERROR_BAD_UNIT + 21, // ERROR_NOT_READY + 22, // ERROR_BAD_COMMAND + 23, // ERROR_CRC + 24, // ERROR_BAD_LENGTH + 25, // ERROR_SEEK + 26, // ERROR_NOT_DOS_DISK + 27, // ERROR_SECTOR_NOT_FOUND + 28, // ERROR_OUT_OF_PAPER + 29, // ERROR_WRITE_FAULT + 30, // ERROR_READ_FAULT + 31, // ERROR_GEN_FAILURE + 32, // ERROR_SHARING_VIOLATION + 33, // ERROR_LOCK_VIOLATION + 34, // ERROR_WRONG_DISK + 36, // ERROR_SHARING_BUFFER_EXCEEDED + 65, // ERROR_NETWORK_ACCESS_DENIED + 82, // ERROR_CANNOT_MAKE + 83, // ERROR_FAIL_I24 + 108, // ERROR_DRIVE_LOCKED + 132, // ERROR_SEEK_ON_DEVICE + 158, // ERROR_NOT_LOCKED + 167, // ERROR_LOCK_FAILED + 35: // 35 (undefined) + return errEACCES + case 80, // ERROR_FILE_EXISTS + 183: // ERROR_ALREADY_EXISTS + return errEEXIST + case 17: // ERROR_NOT_SAME_DEVICE + return errEXDEV + case 267: // ERROR_DIRECTORY (bpo-12802) + return errENOTDIR + case 4: // ERROR_TOO_MANY_OPEN_FILES + return errEMFILE + case 112: // ERROR_DISK_FULL + return errENOSPC + case 109, // ERROR_BROKEN_PIPE + 232: // ERROR_NO_DATA (bpo-13063) + return errEPIPE + case 145: // ERROR_DIR_NOT_EMPTY + return errENOTEMPTY + case 1113: // ERROR_NO_UNICODE_TRANSLATION + return errEILSEQ + case 258: // WAIT_TIMEOUT + return errETIMEDOUT + case 1, // ERROR_INVALID_FUNCTION + 12, // ERROR_INVALID_ACCESS + 13, // ERROR_INVALID_DATA + 87, // ERROR_INVALID_PARAMETER + 131: // ERROR_NEGATIVE_SEEK + return errEINVAL + default: + return errEINVAL + } +} + +// POSIX errno values CPython maps Windows errors onto. Hard-coded to the +// standard POSIX numbers (not Go's Windows-side syscall constants, which +// are fabricated) so they line up with module/errno and errnomap. +const ( + errENOENT = 2 + errE2BIG = 7 + errENOEXEC = 8 + errEBADF = 9 + errECHILD = 10 + errEAGAIN = 11 + errENOMEM = 12 + errEACCES = 13 + errEEXIST = 17 + errEXDEV = 18 + errENOTDIR = 20 + errEINVAL = 22 + errEMFILE = 24 + errENOSPC = 28 + errEPIPE = 32 + errENOTEMPTY = 41 + errEILSEQ = 42 + errETIMEDOUT = 110 +) From efb780b341057e3be1f7a86aef3512c832b634e8 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 20:23:14 +0700 Subject: [PATCH 53/84] errno: use CRT errno values on Windows so OSError promotes correctly Go's syscall package fabricates its E* constants on Windows as 1<<29+iota, which neither matches the Universal CRT errno values CPython exposes (EEXIST is 17) nor the small codes the winerror translation produces. That left errnomap keyed on the fabricated values, so a translated EEXIST (17) found no entry and OSError never promoted to FileExistsError, e.g. py_compile's makedirs over an existing __pycache__. Key errnomap and the errno module table on the ucrt values directly and keep the POSIX syscall values on every other platform. --- errors/errnocodes_other.go | 33 ++++++++ errors/errnocodes_windows.go | 35 +++++++++ errors/exc_os.go | 46 ++++++----- module/errno/entries_windows.go | 131 +++++++++++++++++++++----------- vm/oserrno_windows.go | 2 +- 5 files changed, 181 insertions(+), 66 deletions(-) create mode 100644 errors/errnocodes_other.go create mode 100644 errors/errnocodes_windows.go diff --git a/errors/errnocodes_other.go b/errors/errnocodes_other.go new file mode 100644 index 00000000..1ed57101 --- /dev/null +++ b/errors/errnocodes_other.go @@ -0,0 +1,33 @@ +//go:build !windows + +package errors + +import "syscall" + +// errno codes for the errnomap promotion table. On non-Windows +// platforms Go's syscall package carries the real POSIX values, which +// vary across systems (ETIMEDOUT is 110 on Linux, 60 on macOS), so we +// take them from syscall rather than hard-coding. +// +// CPython: Objects/exceptions.c:4470 _PyExc_InitState ADD_ERRNO panel +var ( + errEAGAIN = int(syscall.EAGAIN) + errEALREADY = int(syscall.EALREADY) + errEINPROGRESS = int(syscall.EINPROGRESS) + errEWOULDBLOCK = int(syscall.EWOULDBLOCK) + errEPIPE = int(syscall.EPIPE) + errESHUTDOWN = int(syscall.ESHUTDOWN) + errECHILD = int(syscall.ECHILD) + errECONNABORTED = int(syscall.ECONNABORTED) + errECONNREFUSED = int(syscall.ECONNREFUSED) + errECONNRESET = int(syscall.ECONNRESET) + errEEXIST = int(syscall.EEXIST) + errENOENT = int(syscall.ENOENT) + errEISDIR = int(syscall.EISDIR) + errENOTDIR = int(syscall.ENOTDIR) + errEINTR = int(syscall.EINTR) + errEACCES = int(syscall.EACCES) + errEPERM = int(syscall.EPERM) + errESRCH = int(syscall.ESRCH) + errETIMEDOUT = int(syscall.ETIMEDOUT) +) diff --git a/errors/errnocodes_windows.go b/errors/errnocodes_windows.go new file mode 100644 index 00000000..5d5b5a08 --- /dev/null +++ b/errors/errnocodes_windows.go @@ -0,0 +1,35 @@ +//go:build windows + +package errors + +// errno codes for the errnomap promotion table on Windows. Go's +// syscall package fabricates E* constants as 1<<29+iota there, so we +// hard-code the Universal CRT values CPython actually uses +// (EEXIST == 17). These line up with the winerror->errno translation +// the VM applies before promotion and with the errno module's table. +// ESHUTDOWN has no ucrt definition, so CPython omits it on Windows; the +// negative sentinel makes errnomap skip it. +// +// CPython: Objects/exceptions.c:4470 _PyExc_InitState ADD_ERRNO panel +// (values from ucrt ) +const ( + errEAGAIN = 11 + errEALREADY = 103 + errEINPROGRESS = 112 + errEWOULDBLOCK = 140 + errEPIPE = 32 + errESHUTDOWN = -1 + errECHILD = 10 + errECONNABORTED = 106 + errECONNREFUSED = 107 + errECONNRESET = 108 + errEEXIST = 17 + errENOENT = 2 + errEISDIR = 21 + errENOTDIR = 20 + errEINTR = 4 + errEACCES = 13 + errEPERM = 1 + errESRCH = 3 + errETIMEDOUT = 138 +) diff --git a/errors/exc_os.go b/errors/exc_os.go index af61fe3a..8630c1d6 100644 --- a/errors/exc_os.go +++ b/errors/exc_os.go @@ -1,8 +1,6 @@ package errors import ( - "syscall" - "github.com/tamnd/gopy/objects" ) @@ -43,29 +41,35 @@ var errnomap = map[int]*objects.Type{} func init() { add := func(code int, t *objects.Type) { + // Codes a platform does not define arrive as a negative + // sentinel from the errnocodes table; skip them so they never + // collide with a real errno (errnos are always positive). + if code < 0 { + return + } if _, dup := errnomap[code]; !dup { errnomap[code] = t } } - add(int(syscall.EAGAIN), PyExc_BlockingIOError) - add(int(syscall.EALREADY), PyExc_BlockingIOError) - add(int(syscall.EINPROGRESS), PyExc_BlockingIOError) - add(int(syscall.EWOULDBLOCK), PyExc_BlockingIOError) - add(int(syscall.EPIPE), PyExc_BrokenPipeError) - add(int(syscall.ESHUTDOWN), PyExc_BrokenPipeError) - add(int(syscall.ECHILD), PyExc_ChildProcessError) - add(int(syscall.ECONNABORTED), PyExc_ConnectionAbortedError) - add(int(syscall.ECONNREFUSED), PyExc_ConnectionRefusedError) - add(int(syscall.ECONNRESET), PyExc_ConnectionResetError) - add(int(syscall.EEXIST), PyExc_FileExistsError) - add(int(syscall.ENOENT), PyExc_FileNotFoundError) - add(int(syscall.EISDIR), PyExc_IsADirectoryError) - add(int(syscall.ENOTDIR), PyExc_NotADirectoryError) - add(int(syscall.EINTR), PyExc_InterruptedError) - add(int(syscall.EACCES), PyExc_PermissionError) - add(int(syscall.EPERM), PyExc_PermissionError) - add(int(syscall.ESRCH), PyExc_ProcessLookupError) - add(int(syscall.ETIMEDOUT), PyExc_TimeoutError) + add(errEAGAIN, PyExc_BlockingIOError) + add(errEALREADY, PyExc_BlockingIOError) + add(errEINPROGRESS, PyExc_BlockingIOError) + add(errEWOULDBLOCK, PyExc_BlockingIOError) + add(errEPIPE, PyExc_BrokenPipeError) + add(errESHUTDOWN, PyExc_BrokenPipeError) + add(errECHILD, PyExc_ChildProcessError) + add(errECONNABORTED, PyExc_ConnectionAbortedError) + add(errECONNREFUSED, PyExc_ConnectionRefusedError) + add(errECONNRESET, PyExc_ConnectionResetError) + add(errEEXIST, PyExc_FileExistsError) + add(errENOENT, PyExc_FileNotFoundError) + add(errEISDIR, PyExc_IsADirectoryError) + add(errENOTDIR, PyExc_NotADirectoryError) + add(errEINTR, PyExc_InterruptedError) + add(errEACCES, PyExc_PermissionError) + add(errEPERM, PyExc_PermissionError) + add(errESRCH, PyExc_ProcessLookupError) + add(errETIMEDOUT, PyExc_TimeoutError) } // ErrnoSubclass returns the OSError subclass that CPython would pick diff --git a/module/errno/entries_windows.go b/module/errno/entries_windows.go index d498916b..53cd0e86 100644 --- a/module/errno/entries_windows.go +++ b/module/errno/entries_windows.go @@ -1,56 +1,99 @@ -// Windows errno table. The Windows C runtime defines a smaller subset -// of POSIX E* codes than Linux; this list mirrors the ones exposed by -// Go's syscall package on windows/amd64. +// Windows errno table. CPython's errno module on Windows exposes the +// codes the Universal CRT's defines, with the CRT's small +// POSIX-style values (EEXIST == 17), NOT Go's syscall package, which +// fabricates E* constants as 1<<29+iota on Windows. Hard-code the CRT +// values so errno.EEXIST and friends match CPython exactly and line up +// with the winerror->errno translation the VM applies to OSError. // -// CPython: Modules/errnomodule.c:121 add_errcode block (MS_WINDOWS arms) +// CPython: Modules/errnomodule.c add_errcode block (values from ucrt +// ; the classic 1-42 range plus the POSIX-2008 100-140 range) package errno -import "syscall" - // errnoEntries returns every (name, code) pair the errno module exposes // on Windows. // // CPython: Modules/errnomodule.c:88 errno_exec (Windows slice) func errnoEntries() []errnoEntry { return []errnoEntry{ - {"EPERM", int(syscall.EPERM)}, - {"ENOENT", int(syscall.ENOENT)}, - {"ESRCH", int(syscall.ESRCH)}, - {"EINTR", int(syscall.EINTR)}, - {"EIO", int(syscall.EIO)}, - {"ENXIO", int(syscall.ENXIO)}, - {"E2BIG", int(syscall.E2BIG)}, - {"ENOEXEC", int(syscall.ENOEXEC)}, - {"EBADF", int(syscall.EBADF)}, - {"ECHILD", int(syscall.ECHILD)}, - {"EAGAIN", int(syscall.EAGAIN)}, - {"ENOMEM", int(syscall.ENOMEM)}, - {"EACCES", int(syscall.EACCES)}, - {"EFAULT", int(syscall.EFAULT)}, - {"EBUSY", int(syscall.EBUSY)}, - {"EEXIST", int(syscall.EEXIST)}, - {"EXDEV", int(syscall.EXDEV)}, - {"ENODEV", int(syscall.ENODEV)}, - {"ENOTDIR", int(syscall.ENOTDIR)}, - {"EISDIR", int(syscall.EISDIR)}, - {"EINVAL", int(syscall.EINVAL)}, - {"ENFILE", int(syscall.ENFILE)}, - {"EMFILE", int(syscall.EMFILE)}, - {"ENOTTY", int(syscall.ENOTTY)}, - {"EFBIG", int(syscall.EFBIG)}, - {"ENOSPC", int(syscall.ENOSPC)}, - {"ESPIPE", int(syscall.ESPIPE)}, - {"EROFS", int(syscall.EROFS)}, - {"EMLINK", int(syscall.EMLINK)}, - {"EPIPE", int(syscall.EPIPE)}, - {"EDOM", int(syscall.EDOM)}, - {"ERANGE", int(syscall.ERANGE)}, - {"EDEADLK", int(syscall.EDEADLK)}, - {"ENAMETOOLONG", int(syscall.ENAMETOOLONG)}, - {"ENOLCK", int(syscall.ENOLCK)}, - {"ENOSYS", int(syscall.ENOSYS)}, - {"ENOTEMPTY", int(syscall.ENOTEMPTY)}, - {"EILSEQ", int(syscall.EILSEQ)}, + {"EPERM", 1}, + {"ENOENT", 2}, + {"ESRCH", 3}, + {"EINTR", 4}, + {"EIO", 5}, + {"ENXIO", 6}, + {"E2BIG", 7}, + {"ENOEXEC", 8}, + {"EBADF", 9}, + {"ECHILD", 10}, + {"EAGAIN", 11}, + {"ENOMEM", 12}, + {"EACCES", 13}, + {"EFAULT", 14}, + {"EBUSY", 16}, + {"EEXIST", 17}, + {"EXDEV", 18}, + {"ENODEV", 19}, + {"ENOTDIR", 20}, + {"EISDIR", 21}, + {"EINVAL", 22}, + {"ENFILE", 23}, + {"EMFILE", 24}, + {"ENOTTY", 25}, + {"EFBIG", 27}, + {"ENOSPC", 28}, + {"ESPIPE", 29}, + {"EROFS", 30}, + {"EMLINK", 31}, + {"EPIPE", 32}, + {"EDOM", 33}, + {"ERANGE", 34}, + {"EDEADLK", 36}, + {"EDEADLOCK", 36}, + {"ENAMETOOLONG", 38}, + {"ENOLCK", 39}, + {"ENOSYS", 40}, + {"ENOTEMPTY", 41}, + {"EILSEQ", 42}, + {"EADDRINUSE", 100}, + {"EADDRNOTAVAIL", 101}, + {"EAFNOSUPPORT", 102}, + {"EALREADY", 103}, + {"EBADMSG", 104}, + {"ECANCELED", 105}, + {"ECONNABORTED", 106}, + {"ECONNREFUSED", 107}, + {"ECONNRESET", 108}, + {"EDESTADDRREQ", 109}, + {"EHOSTUNREACH", 110}, + {"EIDRM", 111}, + {"EINPROGRESS", 112}, + {"EISCONN", 113}, + {"ELOOP", 114}, + {"EMSGSIZE", 115}, + {"ENETDOWN", 116}, + {"ENETRESET", 117}, + {"ENETUNREACH", 118}, + {"ENOBUFS", 119}, + {"ENODATA", 120}, + {"ENOLINK", 121}, + {"ENOMSG", 122}, + {"ENOPROTOOPT", 123}, + {"ENOSR", 124}, + {"ENOSTR", 125}, + {"ENOTCONN", 126}, + {"ENOTRECOVERABLE", 127}, + {"ENOTSOCK", 128}, + {"ENOTSUP", 129}, + {"EOPNOTSUPP", 130}, + {"EOVERFLOW", 132}, + {"EOWNERDEAD", 133}, + {"EPROTO", 134}, + {"EPROTONOSUPPORT", 135}, + {"EPROTOTYPE", 136}, + {"ETIME", 137}, + {"ETIMEDOUT", 138}, + {"ETXTBSY", 139}, + {"EWOULDBLOCK", 140}, } } diff --git a/vm/oserrno_windows.go b/vm/oserrno_windows.go index 453869a4..49f755ed 100644 --- a/vm/oserrno_windows.go +++ b/vm/oserrno_windows.go @@ -155,5 +155,5 @@ const ( errEPIPE = 32 errENOTEMPTY = 41 errEILSEQ = 42 - errETIMEDOUT = 110 + errETIMEDOUT = 138 ) From 0e58c475378b43e0a52ecba284be677ea605b8dd Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 20:32:55 +0700 Subject: [PATCH 54/84] errors: drive ErrnoSubclass test off the platform errno table The test fed int(syscall.E*) inputs, which on Windows are the fabricated 1<<29+iota codes that no longer key errnomap. Move the test internal so it uses the same errEEXIST-style codes errnomap is built from, matching the values that reach ErrnoSubclass at runtime on every platform. --- errors/exc_os_internal_test.go | 40 ++++++++++++++++++++++++++++++++++ errors/exc_os_test.go | 30 ------------------------- 2 files changed, 40 insertions(+), 30 deletions(-) create mode 100644 errors/exc_os_internal_test.go diff --git a/errors/exc_os_internal_test.go b/errors/exc_os_internal_test.go new file mode 100644 index 00000000..dd9763f1 --- /dev/null +++ b/errors/exc_os_internal_test.go @@ -0,0 +1,40 @@ +package errors + +import ( + "testing" + + "github.com/tamnd/gopy/objects" +) + +// TestErrnoSubclass drives ErrnoSubclass off the same platform errno +// codes errnomap is built from (errEEXIST and friends), so the mapping +// is exercised with the values that actually reach it at runtime: real +// POSIX numbers on Unix, ucrt numbers on Windows. +func TestErrnoSubclass(t *testing.T) { + cases := []struct { + errno int + want *objects.Type + }{ + {errENOENT, PyExc_FileNotFoundError}, + {errEEXIST, PyExc_FileExistsError}, + {errEACCES, PyExc_PermissionError}, + {errEPERM, PyExc_PermissionError}, + {errEINTR, PyExc_InterruptedError}, + {errEPIPE, PyExc_BrokenPipeError}, + {errECHILD, PyExc_ChildProcessError}, + {errEISDIR, PyExc_IsADirectoryError}, + {errENOTDIR, PyExc_NotADirectoryError}, + {errECONNREFUSED, PyExc_ConnectionRefusedError}, + {errECONNRESET, PyExc_ConnectionResetError}, + {errECONNABORTED, PyExc_ConnectionAbortedError}, + {errESRCH, PyExc_ProcessLookupError}, + {errETIMEDOUT, PyExc_TimeoutError}, + {0, PyExc_OSError}, + {99999, PyExc_OSError}, + } + for _, c := range cases { + if got := ErrnoSubclass(c.errno); got != c.want { + t.Errorf("ErrnoSubclass(%d) = %v, want %v", c.errno, got, c.want) + } + } +} diff --git a/errors/exc_os_test.go b/errors/exc_os_test.go index b2e79c9d..6fb6a9ba 100644 --- a/errors/exc_os_test.go +++ b/errors/exc_os_test.go @@ -1,7 +1,6 @@ package errors_test import ( - "syscall" "testing" "github.com/tamnd/gopy/errors" @@ -39,32 +38,3 @@ func TestOSErrorHierarchy(t *testing.T) { t.Fatal("BrokenPipeError must inherit from ConnectionError") } } - -func TestErrnoSubclass(t *testing.T) { - cases := []struct { - errno int - want *objects.Type - }{ - {int(syscall.ENOENT), errors.PyExc_FileNotFoundError}, - {int(syscall.EEXIST), errors.PyExc_FileExistsError}, - {int(syscall.EACCES), errors.PyExc_PermissionError}, - {int(syscall.EPERM), errors.PyExc_PermissionError}, - {int(syscall.EINTR), errors.PyExc_InterruptedError}, - {int(syscall.EPIPE), errors.PyExc_BrokenPipeError}, - {int(syscall.ECHILD), errors.PyExc_ChildProcessError}, - {int(syscall.EISDIR), errors.PyExc_IsADirectoryError}, - {int(syscall.ENOTDIR), errors.PyExc_NotADirectoryError}, - {int(syscall.ECONNREFUSED), errors.PyExc_ConnectionRefusedError}, - {int(syscall.ECONNRESET), errors.PyExc_ConnectionResetError}, - {int(syscall.ECONNABORTED), errors.PyExc_ConnectionAbortedError}, - {int(syscall.ESRCH), errors.PyExc_ProcessLookupError}, - {int(syscall.ETIMEDOUT), errors.PyExc_TimeoutError}, - {0, errors.PyExc_OSError}, - {99999, errors.PyExc_OSError}, - } - for _, c := range cases { - if got := errors.ErrnoSubclass(c.errno); got != c.want { - t.Errorf("ErrnoSubclass(%d) = %v, want %v", c.errno, got, c.want) - } - } -} From 226d9cfb0fec428419a4dc476c3635f0de8bbf98 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 21:18:18 +0700 Subject: [PATCH 55/84] frozen: register __hello__/__phello__ test modules and honor frozen override test_frozen imports the toy frozen modules CPython compiles into the interpreter (__hello__, __phello__ and the alias entries). Wire them up: - imp.FrozenModule grows Source/OrigName so an entry can carry its .py text and compile lazily through FrozenCompiler, plus an alias origin for find_frozen. - _imp honors the frozen-modules override that import_helper toggles via _override_frozen_modules_for_tests, so the frozen/disk split the tests exercise actually flips. - sys._stdlib_dir is exposed so FrozenImporter._resolve_filename can find the on-disk copy of a frozen module, letting an unfrozen submodule load when its parent was imported frozen. - vendor Lib/__hello__.py and Lib/__phello__/ for the disk path. test_frozen now passes 3/3, matching CPython. --- cmd/gopy/main.go | 14 ++++ imp/frozen.go | 104 +++++++++++++++++++++++++++++- imp/frozen_test_modules.go | 65 +++++++++++++++++++ module/_imp/module.go | 55 ++++++++++++---- module/sys/module.go | 29 +++++++++ stdlib/__hello__.py | 16 +++++ stdlib/__phello__/__init__.py | 7 ++ stdlib/__phello__/ham/__init__.py | 0 stdlib/__phello__/ham/eggs.py | 0 stdlib/__phello__/spam.py | 7 ++ 10 files changed, 285 insertions(+), 12 deletions(-) create mode 100644 imp/frozen_test_modules.go create mode 100644 stdlib/__hello__.py create mode 100644 stdlib/__phello__/__init__.py create mode 100644 stdlib/__phello__/ham/__init__.py create mode 100644 stdlib/__phello__/ham/eggs.py create mode 100644 stdlib/__phello__/spam.py diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 50e331fb..37287ec6 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -273,6 +273,14 @@ func installPathFinder(scriptPath string) { } if root := findStdlibRoot(); root != "" { paths = append(paths, root) + // Expose the resolved stdlib root as sys._stdlib_dir so + // FrozenImporter._resolve_filename can compute __file__ and a + // frozen package's __path__ against the on-disk Lib copy, letting + // an unfrozen submodule (e.g. __phello__.spam from disk) be found + // when its parent was loaded frozen. + // + // CPython: Lib/importlib/_bootstrap.py:1108 _resolve_filename + sys.SetStdlibDir(root) // Pin the resolved root into the environment so any subprocess // this interpreter spawns through sys.executable bootstraps from // the same stdlib, even when it runs in an unrelated cwd (e.g. @@ -289,6 +297,12 @@ func installPathFinder(scriptPath string) { Paths: paths, Compiler: gopyCompile, }) + // Frozen test modules (__hello__, __phello__ and friends) keep their + // source verbatim and compile lazily through the same compiler the + // path finder uses. + // + // CPython: Python/frozen.c _PyImport_FrozenModules + imp.FrozenCompiler = gopyCompile sys.SetPath(paths) // Wire the meta-path finder to consult the live sys.path so // `sys.path.insert(0, x)` from user code is honored on the next diff --git a/imp/frozen.go b/imp/frozen.go index 134d338f..207962ab 100644 --- a/imp/frozen.go +++ b/imp/frozen.go @@ -9,7 +9,9 @@ package imp import ( + "errors" "sync" + "sync/atomic" "github.com/tamnd/gopy/objects" ) @@ -22,17 +24,117 @@ import ( type FrozenModule struct { // Name is the dotted module name, e.g. "importlib._bootstrap". Name string - // Code is the precompiled code object. nil for placeholder entries. + // Code is the precompiled code object. nil for placeholder entries + // and for source-backed entries (compiled lazily from Source). Code *objects.Code + // Source is the canonical .py source for entries whose bytecode is + // produced lazily by FrozenCompiler rather than pre-embedded. This + // stands in for CPython's marshalled frozen blob: gopy stores the + // source text (vendored verbatim) and compiles it on first use. + Source string + // OrigName is the name find_frozen reports for the entry. Frozen + // aliases (e.g. __phello_alias__ -> __hello__) point at a different + // source module; FrozenImporter._resolve_filename keys the on-disk + // __file__ off this. Empty means the entry is its own origin. + // + // CPython: Python/frozen.c _PyImport_FrozenAliases + OrigName string // IsPackage is true when the frozen module is a package (has __path__). IsPackage bool + + compileMu sync.Mutex + compiled *objects.Code + compileErr error + didCompile bool +} + +// FrozenCompiler turns frozen module source into a code object. It is +// installed once at interpreter startup (cmd/gopy wires gopyCompile) +// so the imp package need not depend on parser/compile directly, +// mirroring the SourceCompiler indirection used for path imports. +// +// CPython: Python/pythonrun.c:1102 Py_CompileStringExFlags +var FrozenCompiler func(src []byte, filename string) (*objects.Code, error) + +// CodeObject returns the entry's code object, compiling Source on first +// use. It returns (nil, nil) for a pure placeholder (no Code, no +// Source). The compiled result is cached so repeated imports reuse one +// code object, matching CPython's single marshalled blob per entry. +func (m *FrozenModule) CodeObject() (*objects.Code, error) { + if m.Code != nil { + return m.Code, nil + } + if m.Source == "" { + return nil, nil + } + m.compileMu.Lock() + defer m.compileMu.Unlock() + if m.didCompile { + return m.compiled, m.compileErr + } + m.didCompile = true + if FrozenCompiler == nil { + m.compileErr = errors.New("imp: frozen compiler not installed") + return nil, m.compileErr + } + m.compiled, m.compileErr = FrozenCompiler([]byte(m.Source), "") + return m.compiled, m.compileErr +} + +// HasCode reports whether the entry can yield a code object, either +// pre-embedded or compilable from Source. Placeholder entries (the +// importlib bootstrap stubs, which gopy loads from disk) return false. +func (m *FrozenModule) HasCode() bool { + return m.Code != nil || m.Source != "" +} + +// Origin returns the name find_frozen reports for the entry: OrigName +// when set, otherwise the entry's own Name. +func (m *FrozenModule) Origin() string { + if m.OrigName != "" { + return m.OrigName + } + return m.Name } var ( frozenMu sync.RWMutex frozenModules = map[string]*FrozenModule{} + + // frozenOverride mirrors PyConfig.use_frozen_modules under the test + // override: >0 forces frozen on, <0 forces it off, 0 uses the + // default. test.support.import_helper toggles it via + // _imp._override_frozen_modules_for_tests. + // + // CPython: Python/import.c:2821 use_frozen + frozenOverride atomic.Int32 ) +// SetFrozenOverride records the test override for frozen-module lookup +// and returns the previous value. +// +// CPython: Python/import.c:5034 _imp__override_frozen_modules_for_tests_impl +func SetFrozenOverride(v int) int { + return int(frozenOverride.Swap(int32(v))) +} + +// UseFrozen reports whether frozen-module lookup is currently enabled. +// gopy's default (override 0) is on, matching CPython's release-build +// PyConfig.use_frozen_modules default; entries without embedded code +// still fall through to the path finder via HasCode. +// +// CPython: Python/import.c:2821 use_frozen +func UseFrozen() bool { + switch v := frozenOverride.Load(); { + case v > 0: + return true + case v < 0: + return false + default: + return true + } +} + // RegisterFrozen adds or replaces a frozen module in the table. It is // safe to call from multiple goroutines and from init(). // diff --git a/imp/frozen_test_modules.go b/imp/frozen_test_modules.go new file mode 100644 index 00000000..06a5af57 --- /dev/null +++ b/imp/frozen_test_modules.go @@ -0,0 +1,65 @@ +// Frozen test-module registrations. CPython compiles a handful of toy +// modules (__hello__, __phello__ and friends) into the interpreter so +// the import machinery has frozen targets to exercise without touching +// the filesystem. test_frozen and the importlib frozen tests import +// them through FrozenImporter. +// +// gopy keeps the source text (vendored verbatim from CPython's Lib/) +// rather than a marshalled blob and compiles it lazily via +// FrozenCompiler. The same modules are also vendored on disk under the +// stdlib root so the "frozen disabled" code paths can load them through +// the path finder, exactly as CPython ships Lib/__hello__.py alongside +// the frozen copy. +// +// CPython: Python/frozen.c:98 _PyImport_FrozenModules test entries +package imp + +// Canonical source for the frozen test modules. These mirror +// Lib/__hello__.py and the Lib/__phello__/ package byte-for-byte. +// +// CPython: Lib/__hello__.py +const frozenHelloSource = `initialized = True + +class TestFrozenUtf8_1: + """\u00b6""" + +class TestFrozenUtf8_2: + """\u03c0""" + +class TestFrozenUtf8_4: + """\U0001f600""" + +def main(): + print("Hello world!") + +if __name__ == '__main__': + main() +` + +// CPython: Lib/__phello__/__init__.py and Lib/__phello__/spam.py (same body) +const frozenPhelloSource = `initialized = True + +def main(): + print("Hello world!") + +if __name__ == '__main__': + main() +` + +func init() { + // __hello__ and its aliases share one source module; the alias + // entries report __hello__ as their origin so FrozenImporter resolves + // the on-disk __file__ against Lib/__hello__.py. + // + // CPython: Python/frozen.c:98 / _PyImport_FrozenAliases + RegisterFrozen(&FrozenModule{Name: "__hello__", Source: frozenHelloSource}) + RegisterFrozen(&FrozenModule{Name: "__hello_alias__", Source: frozenHelloSource, OrigName: "__hello__"}) + RegisterFrozen(&FrozenModule{Name: "__phello_alias__", Source: frozenHelloSource, OrigName: "__hello__", IsPackage: true}) + RegisterFrozen(&FrozenModule{Name: "__phello_alias__.spam", Source: frozenHelloSource, OrigName: "__hello__"}) + + // __phello__ is a real frozen package with a frozen submodule (spam). + // + // CPython: Python/frozen.c:102 + RegisterFrozen(&FrozenModule{Name: "__phello__", Source: frozenPhelloSource, IsPackage: true}) + RegisterFrozen(&FrozenModule{Name: "__phello__.spam", Source: frozenPhelloSource}) +} diff --git a/module/_imp/module.go b/module/_imp/module.go index a4ba9587..63a5a50d 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -165,15 +165,20 @@ func buildModule() (*objects.Module, error) { return nil, err } // _override_frozen_modules_for_tests / _override_multi_interp_extensions_check: - // test.support.import_helper toggles these around test runs. gopy - // keeps them as no-ops returning a sentinel int matching CPython's - // previous-value convention. + // test.support.import_helper toggles these around test runs. + // _override_frozen_modules_for_tests records the override that + // use_frozen() consults (>0 on, <0 off, 0 default) and returns the + // previous value, matching the C impl. // // CPython: Python/import.c:5034 _imp__override_frozen_modules_for_tests_impl // CPython: Python/import.c:5052 _imp__override_multi_interp_extensions_check_impl if err := d.SetItem(objects.NewStr("_override_frozen_modules_for_tests"), - objects.NewBuiltinFunction("_override_frozen_modules_for_tests", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { - return objects.None(), nil + objects.NewBuiltinFunction("_override_frozen_modules_for_tests", func(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + override, err := signedIntArg(args, "_override_frozen_modules_for_tests") + if err != nil { + return nil, err + } + return objects.NewInt(int64(imp.SetFrozenOverride(override))), nil })); err != nil { return nil, err } @@ -199,6 +204,21 @@ func nameArg(fn string, args []objects.Object) (string, error) { return u.Value(), nil } +// signedIntArg pulls a single int positional out of args for the +// override toggles, which take one C int. A missing argument defaults +// to 0 (the "use default" override state). +func signedIntArg(args []objects.Object, fn string) (int, error) { + if len(args) < 1 { + return 0, nil + } + v, ok := args[0].(*objects.Int) + if !ok { + return 0, fmt.Errorf("TypeError: %s() argument must be int, not '%T'", fn, args[0]) + } + n, _ := v.Int64() + return int(n), nil +} + // isBuiltin implements _imp.is_builtin(name). // // CPython: Python/import.c:4720 _imp_is_builtin_impl @@ -222,8 +242,11 @@ func isFrozen(args []objects.Object, _ map[string]objects.Object) (objects.Objec if err != nil { return nil, err } + if !imp.UseFrozen() { + return objects.NewBool(false), nil + } fm, ok := imp.FindFrozen(name) - return objects.NewBool(ok && fm.Code != nil), nil + return objects.NewBool(ok && fm.HasCode()), nil } // isFrozenPackage implements _imp.is_frozen_package(name). @@ -235,7 +258,7 @@ func isFrozenPackage(args []objects.Object, _ map[string]objects.Object) (object return nil, err } fm, ok := imp.FindFrozen(name) - if !ok || fm.Code == nil { + if !ok || !fm.HasCode() { return nil, fmt.Errorf("ImportError: No such frozen object named %s", name) } return objects.NewBool(fm.IsPackage), nil @@ -253,14 +276,17 @@ func findFrozen(args []objects.Object, _ map[string]objects.Object) (objects.Obj if err != nil { return nil, err } + if !imp.UseFrozen() { + return objects.None(), nil + } fm, ok := imp.FindFrozen(name) - if !ok || fm.Code == nil { + if !ok || !fm.HasCode() { return objects.None(), nil } return objects.NewTuple([]objects.Object{ objects.None(), objects.NewBool(fm.IsPackage), - objects.NewStr(name), + objects.NewStr(fm.Origin()), }), nil } @@ -286,10 +312,17 @@ func getFrozenObject(args []objects.Object, _ map[string]objects.Object) (object } fm, ok := imp.FindFrozen(name) - if !ok || fm.Code == nil { + if !ok || !fm.HasCode() { + return nil, fmt.Errorf("ImportError: No such frozen object named %s", name) + } + code, err := fm.CodeObject() + if err != nil { + return nil, err + } + if code == nil { return nil, fmt.Errorf("ImportError: No such frozen object named %s", name) } - return fm.Code, nil + return code, nil } // unmarshalFrozenData ports unmarshal_frozen_code for the explicit-data diff --git a/module/sys/module.go b/module/sys/module.go index ec3fd1ab..b2dcd483 100644 --- a/module/sys/module.go +++ b/module/sys/module.go @@ -88,6 +88,26 @@ func SetPath(path []string) { } } +// pendingStdlibDir records the stdlib root the next sys-module build +// should expose as sys._stdlib_dir. FrozenImporter._resolve_filename +// reads it to locate the on-disk copy of a frozen module. SetStdlibDir +// also refreshes the live attribute when sys is already imported. +// +// CPython: Python/sysmodule.c:3951 _PySys_UpdateConfig (stdlib_dir) +var pendingStdlibDir string + +// SetStdlibDir records the stdlib root and exposes it as +// sys._stdlib_dir, refreshing the live attribute when sys is already +// imported. +// +// CPython: Python/sysmodule.c:3951 _PySys_UpdateConfig (stdlib_dir) +func SetStdlibDir(dir string) { + pendingStdlibDir = dir + if md := liveSysDict(); md != nil { + _ = md.SetItem(objects.NewStr("_stdlib_dir"), objects.NewStr(dir)) + } +} + // pendingSafePath records the safe_path flag supplied on the command // line (-P / -I / PYTHONSAFEPATH) before sys is built. buildModule // reads it when stamping sys.flags; SetSafePath also refreshes the live @@ -365,6 +385,15 @@ func buildModule() (*objects.Module, error) { return nil, err } } + // sys._stdlib_dir lets FrozenImporter._resolve_filename find the + // on-disk copy of a frozen module. + // + // CPython: Python/sysmodule.c:3951 _PySys_UpdateConfig (stdlib_dir) + if pendingStdlibDir != "" { + if err := setStr(md, "_stdlib_dir", pendingStdlibDir); err != nil { + return nil, err + } + } // sys.exc_info reads the per-thread handled-exception slot the vm // maintains across PUSH_EXC_INFO / POP_EXCEPT. unittest's // _Outcome.testPartExecutor and traceback.format_exc both call it diff --git a/stdlib/__hello__.py b/stdlib/__hello__.py new file mode 100644 index 00000000..c09d6a4f --- /dev/null +++ b/stdlib/__hello__.py @@ -0,0 +1,16 @@ +initialized = True + +class TestFrozenUtf8_1: + """\u00b6""" + +class TestFrozenUtf8_2: + """\u03c0""" + +class TestFrozenUtf8_4: + """\U0001f600""" + +def main(): + print("Hello world!") + +if __name__ == '__main__': + main() diff --git a/stdlib/__phello__/__init__.py b/stdlib/__phello__/__init__.py new file mode 100644 index 00000000..d37bd276 --- /dev/null +++ b/stdlib/__phello__/__init__.py @@ -0,0 +1,7 @@ +initialized = True + +def main(): + print("Hello world!") + +if __name__ == '__main__': + main() diff --git a/stdlib/__phello__/ham/__init__.py b/stdlib/__phello__/ham/__init__.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/__phello__/ham/eggs.py b/stdlib/__phello__/ham/eggs.py new file mode 100644 index 00000000..e69de29b diff --git a/stdlib/__phello__/spam.py b/stdlib/__phello__/spam.py new file mode 100644 index 00000000..d37bd276 --- /dev/null +++ b/stdlib/__phello__/spam.py @@ -0,0 +1,7 @@ +initialized = True + +def main(): + print("Hello world!") + +if __name__ == '__main__': + main() From 49519a3f5d02314d7a6847f0ece2b940890fae47 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 21:26:00 +0700 Subject: [PATCH 56/84] spec 1731: mark test_frozen green in audit table and checklist --- website/docs/specs/1700/1731_modules_imports_panel.md | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md index fd157486..11be8fea 100644 --- a/website/docs/specs/1700/1731_modules_imports_panel.md +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -40,7 +40,7 @@ runs all of the non-interpreter files green. | `test_pyclbr` | OK | `ModuleNotFoundError: pyclbr` | | `test_pkgimport` | (covered by `test_import/`) | no flat file | | `test_runpy` | OK | 3 ERROR | -| `test_frozen` | OK | `ModuleNotFoundError: __hello__` (frozen module) | +| `test_frozen` | OK | **OK (3/3)** — frozen test modules + override + `sys._stdlib_dir` shipped | | `test_zipimport` | OK | **OK (91 tests, 4 skipped)** | | `test_zipimport_support` | OK | needs vendored `test.test_doctest` (doctest) | | `test_zipapp` | OK | `ModuleNotFoundError: zipapp` | @@ -105,7 +105,7 @@ CPython 3.14.5 (counts and `-v` lists). - [ ] P2: vendor `zipapp` - [x] `test_zipimport` green (91 tests): `func_getattro` incref + `config_get` port - [x] `test_module/` green (39 tests) -- [ ] P3: frozen `__hello__` + frozen module table for `test_frozen` +- [x] P3: frozen `__hello__`/`__phello__` + aliases, frozen override, `sys._stdlib_dir` — `test_frozen` green (3/3) - [ ] P4: `test_runpy` package-init exception path - [ ] P5: re-audit `test_import/`, `test_importlib/`, `test_module/` - [ ] P7: live importlib finders on `sys.meta_path` + `_imp` C functions (architectural) From ca2f9ddc1c904752a16bea12a6b8a250e00c9770 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 21:31:21 +0700 Subject: [PATCH 57/84] frozen: fix marshalled spelling flagged by misspell linter --- imp/frozen.go | 4 ++-- imp/frozen_test_modules.go | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/imp/frozen.go b/imp/frozen.go index 207962ab..282e719c 100644 --- a/imp/frozen.go +++ b/imp/frozen.go @@ -29,7 +29,7 @@ type FrozenModule struct { Code *objects.Code // Source is the canonical .py source for entries whose bytecode is // produced lazily by FrozenCompiler rather than pre-embedded. This - // stands in for CPython's marshalled frozen blob: gopy stores the + // stands in for CPython's marshaled frozen blob: gopy stores the // source text (vendored verbatim) and compiles it on first use. Source string // OrigName is the name find_frozen reports for the entry. Frozen @@ -59,7 +59,7 @@ var FrozenCompiler func(src []byte, filename string) (*objects.Code, error) // CodeObject returns the entry's code object, compiling Source on first // use. It returns (nil, nil) for a pure placeholder (no Code, no // Source). The compiled result is cached so repeated imports reuse one -// code object, matching CPython's single marshalled blob per entry. +// code object, matching CPython's single marshaled blob per entry. func (m *FrozenModule) CodeObject() (*objects.Code, error) { if m.Code != nil { return m.Code, nil diff --git a/imp/frozen_test_modules.go b/imp/frozen_test_modules.go index 06a5af57..abdd9be2 100644 --- a/imp/frozen_test_modules.go +++ b/imp/frozen_test_modules.go @@ -5,7 +5,7 @@ // them through FrozenImporter. // // gopy keeps the source text (vendored verbatim from CPython's Lib/) -// rather than a marshalled blob and compiles it lazily via +// rather than a marshaled blob and compiles it lazily via // FrozenCompiler. The same modules are also vendored on disk under the // stdlib root so the "frozen disabled" code paths can load them through // the path finder, exactly as CPython ships Lib/__hello__.py alongside From 931b46ab9be2f2b4f2805ff527fe2681516b3479 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 21:50:45 +0700 Subject: [PATCH 58/84] io: accept any bytes-like object in BufferedWriter.write BufferedWriter.write only matched *Bytes and *ByteArray, so writing a memoryview (what pathlib.Path.write_bytes hands it) raised TypeError. CPython runs the data through PyObject_GetBuffer, accepting any contiguous buffer. Route through objects.AsBytesLike to match. --- module/io/bufferedio.go | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/module/io/bufferedio.go b/module/io/bufferedio.go index 31f392cb..b00e8839 100644 --- a/module/io/bufferedio.go +++ b/module/io/bufferedio.go @@ -884,13 +884,8 @@ func (b *Buffered) bufferedWrite(args []objects.Object) (objects.Object, error) if len(args) < 1 { return nil, fmt.Errorf("TypeError: write() requires a data argument") } - var data []byte - switch v := args[0].(type) { - case *objects.Bytes: - data = v.Bytes() - case *objects.ByteArray: - data = v.Bytes() - default: + data, ok := objects.AsBytesLike(args[0]) + if !ok { return nil, fmt.Errorf("TypeError: a bytes-like object is required, not %s", args[0].Type().Name) } written := 0 From d6fdaabc508dc57b4dc061ff50481ed938c1517c Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 22:11:06 +0700 Subject: [PATCH 59/84] instance: drop inline-values fast path once __dict__ is exposed A class with a class-level attribute plus an __init__ that writes through vars(self).update(kwargs) was reading the class default instead of the per-instance value on the second and later instances built in a loop. objectGetDict materialized and exposed the instance dict but left inlineValid set, so LOAD_ATTR_NONDESCRIPTOR_WITH_VALUES kept serving the cached class attribute even after a direct dict store shadowed it. Once Python code holds the dict it can store without routing through instanceSetAttr, so the cached-keys tracking can't stay in sync. Flip inlineValid off on exposure, matching make_dict_from_instance_attributes clearing values->valid, so the WITH_VALUES arms deopt and re-read the dict. Also route defaultdict.__getitem__ through a type-level __missing__ lookup so a subclass that overrides __missing__ (FreezableDefaultDict) is honored instead of always inserting via the default factory. --- module/_collections/module.go | 13 ++++++++++++- objects/object.go | 12 ++++++++++++ 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/module/_collections/module.go b/module/_collections/module.go index f2411a2d..9eab9fd8 100644 --- a/module/_collections/module.go +++ b/module/_collections/module.go @@ -1486,7 +1486,18 @@ func defaultDictGetItem(o, key objects.Object) (objects.Object, error) { if err == nil { return v, nil } - // Key absent: call __missing__. + // Key absent: dict_subscript looks up __missing__ at the type level, so + // a defaultdict subclass that overrides it (and declines to insert) is + // honoured instead of always running defdict_missing. + // + // CPython: Objects/dictobject.c:2229 dict_subscript + missingFn, merr := objects.LookupSpecial(o, "__missing__") + if merr != nil { + return nil, merr + } + if missingFn != nil { + return objects.CallOneArg(missingFn, key) + } res, merr := defaultDictMissing([]objects.Object{o, key}, nil) if merr != nil { return nil, merr diff --git a/objects/object.go b/objects/object.go index 7e75b664..caa746e1 100644 --- a/objects/object.go +++ b/objects/object.go @@ -1005,6 +1005,18 @@ func objectGetDict(o Object) (Object, error) { // managed dict over the inline values, leaving them to be detached // in _PyObject_FreeInstanceAttributes at dealloc. v.dictExposed = true + // Handing the dict to Python code drops the inline-values fast + // path: code can now store straight into the mapping (e.g. + // vars(self).update(...)) without routing through instanceSetAttr, + // so gopy can no longer keep the type's cached keys in sync. CPython + // materializes a combined dict here and clears values->valid, which + // deopts the LOAD_ATTR_*_WITH_VALUES arms; mirror that by flipping + // inlineValid so a class attribute can no longer be served from the + // cache while a direct instance store shadows it. + // + // CPython: Objects/dictobject.c:6857 make_dict_from_instance_attributes + // (PyDictValues stops being valid once the dict is built) + v.inlineValid = false return v.dict, nil case *Int: // The builtin int type has no tp_dictoffset, so (42).__dict__ From 4e956bc68407b1737d09af339de5cf67461965b4 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 22:16:17 +0700 Subject: [PATCH 60/84] module: install __dict__ getset on ModuleType so subclasses resolve it generically A ModuleType subclass (importlib.util._LazyModule) reaches its namespace via object.__getattribute__(self, '__dict__'). type_new skips installing the __dict__ getset on the subclass because the dict slot is inherited, and ModuleType never carried one, so the generic getattr path found no descriptor and raised AttributeError. Install the getset on ModuleType itself and let objectGetDict hand back md_dict for a *Module. --- objects/module.go | 10 ++++++++++ objects/object.go | 10 ++++++++++ 2 files changed, 20 insertions(+) diff --git a/objects/module.go b/objects/module.go index d3922f4f..8869dfd5 100644 --- a/objects/module.go +++ b/objects/module.go @@ -41,6 +41,16 @@ func init() { // // CPython: Objects/moduleobject.c:1416 PyModule_Type (tp_dictoffset set) ModuleType.HasDict = true + // PyModule_Type ships a __dict__ getset in module_getset. A bare module + // answers __dict__ through moduleGetattr, but a ModuleType subclass that + // reaches __dict__ via the generic path (importlib.util._LazyModule does + // `object.__getattribute__(self, '__dict__')`) needs the descriptor in + // the MRO. type_new_descriptors skips installing one on the subclass + // because the dict slot is inherited, so the descriptor must live on + // ModuleType itself. + // + // CPython: Objects/moduleobject.c:728 module_getset (__dict__ getset) + installInstanceDictDescr(ModuleType) // A module also carries md_weaklist (a non-zero tp_weaklistoffset), so // a subclass inherits the weakref slot rather than adding its own. This // keeps a ModuleType subclass layout-compatible with module, which diff --git a/objects/object.go b/objects/object.go index caa746e1..6fffff3f 100644 --- a/objects/object.go +++ b/objects/object.go @@ -986,6 +986,16 @@ func objectGetWeakref(o Object) (Object, error) { func objectGetDict(o Object) (Object, error) { switch v := o.(type) { + case *Module: + // A module always carries md_dict, even a user subclass of + // ModuleType that never sets tp_dictoffset (HasDict false). The + // generic object.__getattribute__ path reaches here for + // `object.__getattribute__(mod, '__dict__')` (importlib's + // _LazyModule does exactly this), so return md_dict directly + // rather than gating on HasDict like the AttrDictHolder arm below. + // + // CPython: Objects/moduleobject.c module_dict getset (md_dict) + return v.Dict(), nil case *Instance: if v.dict == nil { if !v.Type().HasDict { From 75737efa8252d8a487a13d9a13ff1e29fb7c91ee Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 22:22:01 +0700 Subject: [PATCH 61/84] _thread: release GIL while RLock.acquire blocks on the gate rlock_acquire held the GIL while blocking on the gate mutex, so a thread waiting to acquire an RLock owned by another thread would pin the GIL and deadlock every other Python thread (intermittent hang across test_importlib). Wrap the blocking gate.Lock and the timed poll in AllowThreads, matching the non-reentrant lock path and CPython's Py_BEGIN_ALLOW_THREADS around the lock wait. compile() also now accepts an os.PathLike filename (PyUnicode_FSDecoder), so importlib source loaders that pass a pathlib.Path compile instead of raising TypeError. --- builtins/compile.go | 26 +++++++++++++++++++++++++- module/_thread/rlock.go | 40 ++++++++++++++++++++++++++++------------ 2 files changed, 53 insertions(+), 13 deletions(-) diff --git a/builtins/compile.go b/builtins/compile.go index 6eb19867..90114ae4 100644 --- a/builtins/compile.go +++ b/builtins/compile.go @@ -109,7 +109,7 @@ func parseCompileArgs(args []objects.Object, kwargs map[string]objects.Object) ( return compileArgs{}, err } } - filename, err := stringArg(bound[1], "filename") + filename, err := compileFilenameArg(bound[1]) if err != nil { return compileArgs{}, err } @@ -150,6 +150,30 @@ func parseCompileArgs(args []objects.Object, kwargs map[string]objects.Object) ( }, nil } +// compileFilenameArg decodes the filename argument. compile() runs it +// through PyUnicode_FSDecoder, which accepts str, bytes, or any +// os.PathLike (pathlib.Path) by invoking __fspath__. importlib's source +// loaders pass a pathlib.Path here, so a bare str check is too strict. +// +// CPython: Python/bltinmodule.c builtin_compile (filename: object, +// PyUnicode_FSDecoder) and Objects/unicodeobject.c PyOS_FSPath +func compileFilenameArg(o objects.Object) (string, error) { + switch v := o.(type) { + case *objects.Unicode: + return v.Value(), nil + case *objects.Bytes: + return string(v.Bytes()), nil + } + if fspath, err := objects.GetAttr(o, objects.NewStr("__fspath__")); err == nil { + result, callErr := objects.CallNoArgs(fspath) + if callErr != nil { + return "", callErr + } + return compileFilenameArg(result) + } + return "", fmt.Errorf("TypeError: compile() filename must be str, bytes or os.PathLike, not %s", o.Type().Name) +} + // compileSourceArg accepts the first positional argument to compile(). // str routes through ParseString. bytes / bytearray route through // ParseBytes so the PEP 263 coding cookie controls the decode. AST diff --git a/module/_thread/rlock.go b/module/_thread/rlock.go index f4a162ef..ffae1ca0 100644 --- a/module/_thread/rlock.go +++ b/module/_thread/rlock.go @@ -213,7 +213,15 @@ func rlockAcquire(r *rlockObject, args []objects.Object, kwargs map[string]objec } if timeoutSecs < 0 { - r.gate.Lock() + // Block indefinitely on the gate. Drop the GIL while parked so the + // owning thread can run far enough to release the gate; holding the + // GIL here would deadlock the owner (and any other Python thread) + // against this goroutine. lockAcquire does the same for non-reentrant + // locks. + // + // CPython: Modules/_threadmodule.c:1083 rlock_acquire releases the GIL + // (ACQUIRE_LOCK runs under Py_BEGIN_ALLOW_THREADS) + objects.AllowThreads(func() { r.gate.Lock() }) r.mu.Lock() r.owner = me r.count = 1 @@ -222,19 +230,27 @@ func rlockAcquire(r *rlockObject, args []objects.Object, kwargs map[string]objec } deadline := time.Now().Add(time.Duration(timeoutSecs * float64(time.Second))) - for { - if r.gate.TryLock() { - r.mu.Lock() - r.owner = me - r.count = 1 - r.mu.Unlock() - return objects.True(), nil - } - if time.Now().After(deadline) { - return objects.False(), nil + acquired := false + objects.AllowThreads(func() { + for { + if r.gate.TryLock() { + acquired = true + return + } + if time.Now().After(deadline) { + return + } + time.Sleep(100 * time.Microsecond) } - time.Sleep(100 * time.Microsecond) + }) + if acquired { + r.mu.Lock() + r.owner = me + r.count = 1 + r.mu.Unlock() + return objects.True(), nil } + return objects.False(), nil } // rlockRelease decrements the recursion counter; when it hits zero the From bfbc54ed1e57453d2984948e91ba6d3bb39ced53 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 22:37:59 +0700 Subject: [PATCH 62/84] imp: survive a fresh importlib re-import without crashing the spec builder import_helper.import_fresh_module blocks _frozen_importlib and re-imports importlib from scratch. Two things broke during that fresh load: - The eager Go-side spec builder force-imported importlib.util while the importlib package was still mid-bootstrap, so spec_from_file_location ran against an unwired _bootstrap_external (_bootstrap=None) and crashed. Defer spec attachment until the package finishes initializing, then drain the queue post-exec, mirroring importlib's own do-not-import-until-bootstrapped rule. - A blocked None entry surfaced as a bare, name-less ImportError, so importlib/abc.py's 'except ImportError as exc: if exc.name != ...' guard re-raised. Raise the proper ModuleNotFoundError carrying name= instead. --- errors/api.go | 14 ++++++++ imp/import.go | 15 +++++++-- imp/pathfinder.go | 86 +++++++++++++++++++++++++++++++++++++++++++++-- vm/eval_import.go | 8 ++++- 4 files changed, 118 insertions(+), 5 deletions(-) diff --git a/errors/api.go b/errors/api.go index e6c82ce2..aa932215 100644 --- a/errors/api.go +++ b/errors/api.go @@ -48,6 +48,20 @@ func SetModuleNotFound(ts *state.Thread, name string) { Raise(ts, exc) } +// SetModuleNotFoundHalted raises ModuleNotFoundError(f'import of {name} +// halted; None in sys.modules', name=name), the exact exception CPython's +// _bootstrap._find_and_load produces when sys.modules[name] is None. The +// `name` member is what importlib/abc.py reads to recognize a blocked +// _frozen_importlib import. +// +// CPython: Lib/importlib/_bootstrap.py:1387 _find_and_load (None sentinel) +func SetModuleNotFoundHalted(ts *state.Thread, name string) { + msg := "import of " + name + " halted; None in sys.modules" + exc := New(PyExc_ModuleNotFoundError, objects.NewTuple([]objects.Object{objects.NewStr(msg)})) + _ = exc.EnsureAttrDict().SetItem(objects.NewStr("name"), objects.NewStr(name)) + Raise(ts, exc) +} + // SetImportErrorWithNameFrom raises ImportError(msg, name=modName, // path=origin, name_from=nameFrom), stamping the three members the // IMPORT_FROM diagnostic promises so a caught exception exposes diff --git a/imp/import.go b/imp/import.go index c2a31c22..844eef51 100644 --- a/imp/import.go +++ b/imp/import.go @@ -18,6 +18,17 @@ import ( // ErrModuleNotFound is returned when no finder can locate the named module. var ErrModuleNotFound = fmt.Errorf("imp: ModuleNotFoundError") +// ErrBlockedNone tags the case where sys.modules[name] is None, the +// sentinel test.support.import_helper.import_fresh_module installs to block +// a module. CPython's _bootstrap raises ModuleNotFoundError(f'import of +// {name} halted; None in sys.modules', name=name); the `name` member is what +// importlib/abc.py inspects (`except ImportError as exc: if exc.name != ...`), +// so the VM must synthesize a typed error carrying it rather than a bare +// ImportError. It wraps ErrModuleNotFound so existing not-found checks match. +// +// CPython: Lib/importlib/_bootstrap.py:1387 _find_and_load (None sentinel) +var ErrBlockedNone = fmt.Errorf("%w: blocked None in sys.modules", ErrModuleNotFound) + // ImportWarnHook routes an ImportWarning through the live _warnings // machinery so it walks the filter list and any recording context // manager (catch_warnings / assertWarns). It is nil until module @@ -59,7 +70,7 @@ func ImportModuleLevelObject(exec Executor, name, pkgname string, level int) (ob } if raw, present := GetModuleRaw(absName); present { if objects.IsNone(raw) { - return nil, fmt.Errorf("ImportError: import of %q halted; None in sys.modules", absName) + return nil, fmt.Errorf("%w: %q", ErrBlockedNone, absName) } if _, ok := raw.(*objects.Module); !ok { // A non-module cached entry: return it verbatim. @@ -98,7 +109,7 @@ func ImportModuleLevel(exec Executor, name, pkgname string, level int) (*objects // CPython: Python/import.c:L1613 sys_modules_get_dict if raw, present := GetModuleRaw(absName); present { if objects.IsNone(raw) { - return nil, fmt.Errorf("ImportError: import of %q halted; None in sys.modules", absName) + return nil, fmt.Errorf("%w: %q", ErrBlockedNone, absName) } if mod, ok := raw.(*objects.Module); ok { return mod, nil diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 430edb41..1922d224 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -634,6 +634,9 @@ func loadAsPackage(exec Executor, compiler SourceCompiler, initFile, pkgDir, nam RemoveModule(name) return nil, fmt.Errorf("imp: loadAsPackage %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } + // Executing this package may have completed importlib's self-bootstrap, + // which unblocks the deferred spec queue (see maybeFlushPendingSpecs). + maybeFlushPendingSpecs(exec) // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so an `__init__.py` that reassigns its own entry // (rare for packages, but the same shape as decimal/_pydecimal). @@ -811,6 +814,9 @@ func loadAsModule(exec Executor, compiler SourceCompiler, file, name, parent str RemoveModule(name) return nil, fmt.Errorf("imp: loadAsModule %q: exec: %w: %w", name, execErr, ErrModuleExecFailed) } + // A freshly executed importlib submodule may have completed the package + // bootstrap; drain any specs deferred while it was incomplete. + maybeFlushPendingSpecs(exec) // CPython: Python/import.c:2715 exec_code_in_module re-reads // sys.modules so a module body that reassigns its own entry // (`sys.modules[__name__] = other`, e.g. decimal/_pydecimal) wins. @@ -963,6 +969,24 @@ var ( pendingSpecs []pendingSpec ) +// maybeFlushPendingSpecs drains the deferred-spec queue if anything is +// queued and importlib.util has become usable. Modules whose specs were +// deferred during importlib's bootstrap (importlib itself, _bootstrap, +// _bootstrap_external) are picked up here the moment the package finishes +// initializing, so a follow-up `import importlib.abc` finds a __spec__ on +// its parent package. +func maybeFlushPendingSpecs(exec Executor) { + pendingMu.Lock() + n := len(pendingSpecs) + pendingMu.Unlock() + if n == 0 { + return + } + if util, ok := ensureImportlibUtil(exec); ok { + flushPendingSpecs(util) + } +} + // flushPendingSpecs drains the deferred-spec queue, building each // module's spec now that importlib.util is available. func flushPendingSpecs(util *objects.Module) { @@ -1080,9 +1104,31 @@ func ensureImportlibUtil(exec Executor) (*objects.Module, bool) { // lookup sees the module without spec_from_file_location yet. // Treat that partial state as "not ready" so the caller defers // rather than flushing the pending queue against a stub. - if _, err := util.Dict().GetItem(objects.NewStr("spec_from_file_location")); err == nil { - return util, true + if _, err := util.Dict().GetItem(objects.NewStr("spec_from_file_location")); err != nil { + return nil, false + } + // spec_from_file_location dereferences importlib._bootstrap_external's + // module-global `_bootstrap` (wired by _set_bootstrap_module). A fresh + // importlib re-import (test.support.import_helper.import_fresh_module) + // can leave util importable while that global is still None, so verify + // the builder is wired before reporting util ready. + if !specBuilderReady() { + return nil, false } + return util, true + } + // Until importlib's package bootstrap finishes, importing importlib.util + // would pull in a fresh importlib._bootstrap_external whose module-global + // `_bootstrap` is still None (it is wired by _set_bootstrap_module at + // importlib/__init__.py:37). spec_from_file_location dereferences that + // global at _bootstrap_external.py:596, so building a spec mid-bootstrap + // crashes. Defer: the module loads without a spec now and the pending + // queue is flushed once importlib is fully initialized. This mirrors + // importlib's own rule ("Until bootstrapping is complete, DO NOT import + // any modules that attempt to import importlib._bootstrap"). + // + // CPython: Lib/importlib/__init__.py:6 (bootstrap-complete guard) + if !importlibBootstrapComplete() { return nil, false } specBootstrapMu.Lock() @@ -1102,6 +1148,42 @@ func ensureImportlibUtil(exec Executor) (*objects.Module, bool) { return util, true } +// importlibBootstrapComplete reports whether the importlib package has +// finished its self-bootstrap. importlib/__init__.py defines import_module +// only after wiring _bootstrap / _bootstrap_external (lines 16-48), so the +// presence of that attribute is a reliable "bootstrap done" sentinel. When +// importlib is not loaded at all (very early startup), report complete so the +// legacy lazy-import path is preserved. +// +// CPython: Lib/importlib/__init__.py:71 def import_module +func importlibBootstrapComplete() bool { + mod, ok := GetModule("importlib") + if !ok { + return true + } + _, err := mod.Dict().GetItem(objects.NewStr("import_module")) + return err == nil +} + +// specBuilderReady reports whether importlib._bootstrap_external is wired to +// importlib._bootstrap. spec_from_file_location dereferences the module-global +// `_bootstrap` (set by _set_bootstrap_module), so a fresh re-import that has +// not run that wiring yet must not be asked to build a spec. +// +// CPython: Lib/importlib/_bootstrap_external.py:1552 _set_bootstrap_module +func specBuilderReady() bool { + be, ok := GetModule("importlib._bootstrap_external") + if !ok { + // Not yet loaded: util will pull it in wired, so treat as ready. + return true + } + v, err := be.Dict().GetItem(objects.NewStr("_bootstrap")) + if err != nil || v == nil { + return false + } + return !objects.IsNone(v) +} + // isFile reports whether path exists and is a regular file. It is the // gopy stand-in for importlib's _path_isfile helper. // diff --git a/vm/eval_import.go b/vm/eval_import.go index 864e4cfd..6d91e494 100644 --- a/vm/eval_import.go +++ b/vm/eval_import.go @@ -247,7 +247,13 @@ func (e *evalState) tryImport(op compile.Opcode, oparg uint32) (next int, ok boo // // CPython: Python/import.c:1759 import_name only sets the error // when PyImport_ImportModuleLevelObject returns NULL without one. - if errors.Is(ierr, imp.ErrModuleNotFound) && !errors.Is(ierr, imp.ErrModuleExecFailed) { + if errors.Is(ierr, imp.ErrBlockedNone) { + // sys.modules[name] is None: raise the halted ModuleNotFoundError + // with name set, so `except ImportError as exc: exc.name` works. + // A blocked sentinel is always an absolute name (level 0), so + // modname is already the resolved key in sys.modules. + pyerrors.SetModuleNotFoundHalted(e.ts, modname) + } else if errors.Is(ierr, imp.ErrModuleNotFound) && !errors.Is(ierr, imp.ErrModuleExecFailed) { pyerrors.SetModuleNotFound(e.ts, modname) } return 0, true, ierr From a3174ac76ca1e7621aa83a003f6c0498f3cb7728 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 22:47:01 +0700 Subject: [PATCH 63/84] import: faithful object setattr, built-in module loaders, winreg platform gate object() attribute assignment now raises AttributeError (object inherits PyObject_GenericSetAttr / GenericGetAttr like PyBaseObject_Type) instead of a bare TypeError, so importlib's legacy-attribute fallbacks catch it. Built-in modules carry __loader__ = BuiltinImporter again. _setup wires the right spec during bootstrap; the deferred spec flush no longer clobbers it, and the builtin-spec builder falls back to importlib._bootstrap for the importer class when importlib.machinery is not imported yet. winreg is only registered on Windows, matching CPython, so import_module skips test_windows on other platforms. --- imp/pathfinder.go | 38 ++++++++++++++++++++++++++++++++++++-- module/winreg/module.go | 10 ++++++++++ objects/object.go | 11 +++++++++++ 3 files changed, 57 insertions(+), 2 deletions(-) diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 1922d224..869246bd 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -1006,11 +1006,25 @@ func flushPendingSpecs(util *objects.Module) { // // CPython: Lib/importlib/_bootstrap.py:516 _init_module_attrs func applySpec(util *objects.Module, p pendingSpec) { + d := p.mod.Dict() + // importlib._bootstrap._setup already walks sys.modules and gives every + // built-in module a spec whose loader is BuiltinImporter. When that has + // run before this deferred flush, a freshly-built spec here would carry + // loader=None (importlib.machinery may not be importable yet) and clobber + // the correct __loader__. Leave _setup's work in place. + // + // CPython: Lib/importlib/_bootstrap.py:1517 _setup (built-in spec set-up) + if p.builtin { + if existing, err := d.GetItem(objects.NewStr("__spec__")); err == nil && existing != nil && !objects.IsNone(existing) { + if loader, lerr := objects.GetAttr(existing, objects.NewStr("loader")); lerr == nil && loader != nil && !objects.IsNone(loader) { + return + } + } + } spec := buildSpec(util, p) if spec == nil { return } - d := p.mod.Dict() _ = d.SetItem(objects.NewStr("__spec__"), spec) if loader, lerr := objects.GetAttr(spec, objects.NewStr("loader")); lerr == nil { _ = d.SetItem(objects.NewStr("__loader__"), loader) @@ -1058,9 +1072,29 @@ func buildSpec(util *objects.Module, p pendingSpec) objects.Object { if err != nil { return nil } + // CPython's BuiltinImporter.find_spec passes the importer class + // itself as the loader, so every built-in module's __loader__ is + // BuiltinImporter, not None. Mirror that: a None loader would fail + // test_importlib's test_everyone_has___loader__. + // + // CPython: Lib/importlib/_bootstrap.py:760 BuiltinImporter.find_spec + loader := objects.Object(objects.None()) + // importlib.machinery re-exports _bootstrap.BuiltinImporter, but it + // may not be imported yet when a built-in module loads early. Fall + // back to importlib._bootstrap, which is always live by this point. + for _, modName := range []string{"importlib.machinery", "importlib._bootstrap"} { + m, ok := GetModule(modName) + if !ok { + continue + } + if bi, lerr := m.Dict().GetItem(objects.NewStr("BuiltinImporter")); lerr == nil && bi != nil { + loader = bi + break + } + } kwargs := objects.NewDict() _ = kwargs.SetItem(objects.NewStr("origin"), objects.NewStr("built-in")) - args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.None()}) + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), loader}) spec, cerr := objects.Call(fn, args, kwargs) if cerr != nil || spec == objects.None() { return nil diff --git a/module/winreg/module.go b/module/winreg/module.go index 896c6537..048829ff 100644 --- a/module/winreg/module.go +++ b/module/winreg/module.go @@ -19,6 +19,7 @@ package winreg import ( "math/big" + "runtime" "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/imp" @@ -26,6 +27,15 @@ import ( ) func init() { + // CPython only builds winreg on Windows (it lives in PC/winreg.c and is + // registered through PC/config.c's _PyImport_Inittab only for the + // Windows build). _bootstrap_external imports it solely under + // `if sys.platform == 'win32'`, so on other platforms the name must stay + // absent: test.support.import_helper.import_module('winreg') then raises + // SkipTest, exactly as it does on CPython/macOS. + if runtime.GOOS != "windows" { + return + } _ = imp.AppendInittab("winreg", buildModule) } diff --git a/objects/object.go b/objects/object.go index 6fffff3f..f62d61c3 100644 --- a/objects/object.go +++ b/objects/object.go @@ -38,6 +38,17 @@ func init() { objectType.Repr = objectRepr objectType.Str = objectStr objectType.Hash = identityHash + // tp_getattro / tp_setattro. PyBaseObject_Type wires both to the + // generic implementations, so every type that does not override them + // inherits GenericGetAttr / GenericSetAttr. A plain object() therefore + // raises AttributeError ("'object' object has no attribute %r and no + // __dict__ for setting new attributes") on attribute assignment, not a + // bare TypeError. + // + // CPython: Objects/typeobject.c:7970 PyBaseObject_Type (tp_getattro = + // PyObject_GenericGetAttr, tp_setattro = PyObject_GenericSetAttr) + objectType.Getattro = GenericGetAttr + objectType.Setattro = GenericSetAttr // object_methods table. // From 8250423557918e71ccdbe8b7978ec3e065045412 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 23:02:25 +0700 Subject: [PATCH 64/84] os: carry nanosecond mtime/atime/ctime in stat_result; vendor _pyio The FileFinder caches directory listings keyed on the directory's st_mtime and only refills when the mtime changes. gopy's os.stat truncated every timestamp to whole seconds, so a directory entry created in the same second as the cache fill was never noticed and find_spec kept returning None for a freshly written submodule. Thread full nanosecond precision through newStatResult and the per-platform stat field extractors: the integer slot floors to seconds, the float slot carries the fraction, and the *_ns slot keeps the raw nanoseconds, matching _pystat_fromstructstat's fill_time. _pyio is vendored unmodified so test_importlib.test_util's atomic-write tests can swap io.FileIO for the pure-Python implementation. --- module/os/module.go | 48 +- module/os/stat_darwin.go | 11 +- module/os/stat_linux.go | 6 +- module/os/stat_other.go | 2 +- module/os/stat_windows.go | 6 +- stdlib/_pyio.py | 2754 +++++++++++++++++++++++++++++++++++++ 6 files changed, 2798 insertions(+), 29 deletions(-) create mode 100644 stdlib/_pyio.py diff --git a/module/os/module.go b/module/os/module.go index 8b156af3..d0c81649 100644 --- a/module/os/module.go +++ b/module/os/module.go @@ -102,14 +102,26 @@ func goFileModeToStMode(m goos.FileMode) int64 { return mode } -// newStatResult assembles an os.stat_result from the second-resolution -// components gathered by the platform stat helpers. The visible integer -// time slots truncate the float seconds; the hidden float and nanosecond -// timestamps and block fields follow the CPython layout. +// newStatResult assembles an os.stat_result from the nanosecond-resolution +// components gathered by the platform stat helpers. CPython derives three +// views from the same struct timespec: the visible integer slot is the +// floor-second, the hidden float slot is sec + 1e-9*nsec, and the hidden +// *_ns slot is the full nanosecond count. The block fields trail the +// timestamps in the CPython layout. atimeNs/mtimeNs/ctimeNs are full +// nanoseconds since the epoch. // // CPython: Modules/posixmodule.c:2456 _pystat_fromstructstat -func newStatResult(mode, ino, dev, nlink, uid, gid, size, atime, mtime, ctime, blksize, blocks, rdev int64) *objects.StructSeq { - ns := func(sec int64) objects.Object { return objects.NewInt(sec * 1_000_000_000) } +func newStatResult(mode, ino, dev, nlink, uid, gid, size, atimeNs, mtimeNs, ctimeNs, blksize, blocks, rdev int64) *objects.StructSeq { + // fillTime mirrors fill_time: the integer field floors toward negative + // infinity, the float field carries the fractional second. + // CPython: Modules/posixmodule.c:2417 fill_time + floorSec := func(ns int64) int64 { + sec := ns / 1_000_000_000 + if ns%1_000_000_000 != 0 && ns < 0 { + sec-- + } + return sec + } return objects.NewStructSeq(statResultType, []objects.Object{ objects.NewInt(mode), objects.NewInt(ino), @@ -118,15 +130,15 @@ func newStatResult(mode, ino, dev, nlink, uid, gid, size, atime, mtime, ctime, b objects.NewInt(uid), objects.NewInt(gid), objects.NewInt(size), - objects.NewInt(atime), // unnamed: integer st_atime - objects.NewInt(mtime), // unnamed: integer st_mtime - objects.NewInt(ctime), // unnamed: integer st_ctime - objects.NewFloat(float64(atime)), - objects.NewFloat(float64(mtime)), - objects.NewFloat(float64(ctime)), - ns(atime), - ns(mtime), - ns(ctime), + objects.NewInt(floorSec(atimeNs)), // unnamed: integer st_atime + objects.NewInt(floorSec(mtimeNs)), // unnamed: integer st_mtime + objects.NewInt(floorSec(ctimeNs)), // unnamed: integer st_ctime + objects.NewFloat(float64(atimeNs) / 1e9), + objects.NewFloat(float64(mtimeNs) / 1e9), + objects.NewFloat(float64(ctimeNs) / 1e9), + objects.NewInt(atimeNs), + objects.NewInt(mtimeNs), + objects.NewInt(ctimeNs), objects.NewInt(blksize), objects.NewInt(blocks), objects.NewInt(rdev), @@ -902,7 +914,7 @@ func stat(args []objects.Object, _ map[string]objects.Object) (objects.Object, e ino, dev, nlink, uid, gid, atime, ctime := statSysFields(info) blksize, blocks, rdev := statBlockFields(info) return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), - int64(uid), int64(gid), info.Size(), atime, info.ModTime().Unix(), ctime, + int64(uid), int64(gid), info.Size(), atime, info.ModTime().UnixNano(), ctime, blksize, blocks, rdev), nil } @@ -1385,7 +1397,7 @@ func osLstat(args []objects.Object, _ map[string]objects.Object) (objects.Object return nil, fmt.Errorf("OSError: %w", serr) } ino, dev, nlink, uid, gid, atime, ctime := statSysFields(info) - mtime := info.ModTime().Unix() + mtime := info.ModTime().UnixNano() blksize, blocks, rdev := statBlockFields(info) return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), int64(uid), int64(gid), info.Size(), atime, mtime, ctime, blksize, blocks, rdev), nil } @@ -1411,7 +1423,7 @@ func osFstat(args []objects.Object, _ map[string]objects.Object) (objects.Object return nil, fmt.Errorf("OSError: %w", err) } ino, dev, nlink, uid, gid, atime, ctime := statSysFields(info) - mtime := info.ModTime().Unix() + mtime := info.ModTime().UnixNano() blksize, blocks, rdev := statBlockFields(info) return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), int64(uid), int64(gid), info.Size(), atime, mtime, ctime, blksize, blocks, rdev), nil } diff --git a/module/os/stat_darwin.go b/module/os/stat_darwin.go index 007ddccf..35c5798c 100644 --- a/module/os/stat_darwin.go +++ b/module/os/stat_darwin.go @@ -13,10 +13,13 @@ import ( ) // statSysFields extracts platform fields from a FileInfo's syscall.Stat_t. -// Darwin/FreeBSD carry atime/ctime in Atimespec/Ctimespec. +// Darwin/FreeBSD carry atime/ctime in Atimespec/Ctimespec. The returned +// atime/ctime are full nanoseconds since the epoch so stat_result keeps +// the sub-second precision CPython's FileFinder relies on for cache +// invalidation. // CPython: Modules/posixmodule.c:3238 os_stat_impl func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, atime, ctime int64) { - mtime := info.ModTime().Unix() + mtime := info.ModTime().UnixNano() atime = mtime ctime = mtime sys, ok := info.Sys().(*syscall.Stat_t) @@ -28,8 +31,8 @@ func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, nlink = uint64(sys.Nlink) uid = sys.Uid gid = sys.Gid - atime = sys.Atimespec.Sec - ctime = sys.Ctimespec.Sec + atime = sys.Atimespec.Sec*1_000_000_000 + sys.Atimespec.Nsec + ctime = sys.Ctimespec.Sec*1_000_000_000 + sys.Ctimespec.Nsec return } diff --git a/module/os/stat_linux.go b/module/os/stat_linux.go index 95c11adb..691bea18 100644 --- a/module/os/stat_linux.go +++ b/module/os/stat_linux.go @@ -16,7 +16,7 @@ import ( // Linux carries atime/ctime in Atim/Ctim. // CPython: Modules/posixmodule.c:3238 os_stat_impl func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, atime, ctime int64) { - mtime := info.ModTime().Unix() + mtime := info.ModTime().UnixNano() atime = mtime ctime = mtime sys, ok := info.Sys().(*syscall.Stat_t) @@ -28,8 +28,8 @@ func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, nlink = uint64(sys.Nlink) //nolint:unconvert // Nlink is uint32 on linux/arm64 uid = sys.Uid gid = sys.Gid - atime = sys.Atim.Sec - ctime = sys.Ctim.Sec + atime = sys.Atim.Sec*1_000_000_000 + int64(sys.Atim.Nsec) + ctime = sys.Ctim.Sec*1_000_000_000 + int64(sys.Ctim.Nsec) return } diff --git a/module/os/stat_other.go b/module/os/stat_other.go index 2d45ff1d..5d340924 100644 --- a/module/os/stat_other.go +++ b/module/os/stat_other.go @@ -14,7 +14,7 @@ import ( // statSysFields returns minimal values on unsupported platforms. // CPython: Modules/posixmodule.c:3238 os_stat_impl func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, atime, ctime int64) { - mtime := info.ModTime().Unix() + mtime := info.ModTime().UnixNano() return 0, 0, 1, 0, 0, mtime, mtime } diff --git a/module/os/stat_windows.go b/module/os/stat_windows.go index c751cd9f..f115ea2d 100644 --- a/module/os/stat_windows.go +++ b/module/os/stat_windows.go @@ -21,7 +21,7 @@ import ( // // CPython: Modules/posixmodule.c:1924 win32_stat func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, atime, ctime int64) { - mtime := info.ModTime().Unix() + mtime := info.ModTime().UnixNano() atime = mtime ctime = mtime nlink = 1 @@ -29,8 +29,8 @@ func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, if !ok || sys == nil { return } - atime = sys.LastAccessTime.Nanoseconds() / 1e9 - ctime = sys.CreationTime.Nanoseconds() / 1e9 + atime = sys.LastAccessTime.Nanoseconds() + ctime = sys.CreationTime.Nanoseconds() return } diff --git a/stdlib/_pyio.py b/stdlib/_pyio.py new file mode 100644 index 00000000..116ce4f3 --- /dev/null +++ b/stdlib/_pyio.py @@ -0,0 +1,2754 @@ +""" +Python implementation of the io module. +""" + +import os +import abc +import codecs +import errno +import stat +import sys +# Import _thread instead of threading to reduce startup cost +from _thread import allocate_lock as Lock +if sys.platform in {'win32', 'cygwin'}: + from msvcrt import setmode as _setmode +else: + _setmode = None + +import io +from io import (__all__, SEEK_SET, SEEK_CUR, SEEK_END, Reader, Writer) # noqa: F401 + +valid_seek_flags = {0, 1, 2} # Hardwired values +if hasattr(os, 'SEEK_HOLE') : + valid_seek_flags.add(os.SEEK_HOLE) + valid_seek_flags.add(os.SEEK_DATA) + +# open() uses max(min(blocksize, 8 MiB), DEFAULT_BUFFER_SIZE) +# when the device block size is available. +DEFAULT_BUFFER_SIZE = 128 * 1024 # bytes + +# NOTE: Base classes defined here are registered with the "official" ABCs +# defined in io.py. We don't use real inheritance though, because we don't want +# to inherit the C implementations. + +# Rebind for compatibility +BlockingIOError = BlockingIOError + +# Does open() check its 'errors' argument? +_CHECK_ERRORS = (hasattr(sys, "gettotalrefcount") or sys.flags.dev_mode) + + +def text_encoding(encoding, stacklevel=2): + """ + A helper function to choose the text encoding. + + When encoding is not None, this function returns it. + Otherwise, this function returns the default text encoding + (i.e. "locale" or "utf-8" depends on UTF-8 mode). + + This function emits an EncodingWarning if *encoding* is None and + sys.flags.warn_default_encoding is true. + + This can be used in APIs with an encoding=None parameter + that pass it to TextIOWrapper or open. + However, please consider using encoding="utf-8" for new APIs. + """ + if encoding is None: + if sys.flags.utf8_mode: + encoding = "utf-8" + else: + encoding = "locale" + if sys.flags.warn_default_encoding: + import warnings + warnings.warn("'encoding' argument not specified.", + EncodingWarning, stacklevel + 1) + return encoding + + +# Wrapper for builtins.open +# +# Trick so that open() won't become a bound method when stored +# as a class variable (as dbm.dumb does). +# +# See init_set_builtins_open() in Python/pylifecycle.c. +@staticmethod +def open(file, mode="r", buffering=-1, encoding=None, errors=None, + newline=None, closefd=True, opener=None): + + r"""Open file and return a stream. Raise OSError upon failure. + + file is either a text or byte string giving the name (and the path + if the file isn't in the current working directory) of the file to + be opened or an integer file descriptor of the file to be + wrapped. (If a file descriptor is given, it is closed when the + returned I/O object is closed, unless closefd is set to False.) + + mode is an optional string that specifies the mode in which the file is + opened. It defaults to 'r' which means open for reading in text mode. Other + common values are 'w' for writing (truncating the file if it already + exists), 'x' for exclusive creation of a new file, and 'a' for appending + (which on some Unix systems, means that all writes append to the end of the + file regardless of the current seek position). In text mode, if encoding is + not specified the encoding used is platform dependent. (For reading and + writing raw bytes use binary mode and leave encoding unspecified.) The + available modes are: + + ========= =============================================================== + Character Meaning + --------- --------------------------------------------------------------- + 'r' open for reading (default) + 'w' open for writing, truncating the file first + 'x' create a new file and open it for writing + 'a' open for writing, appending to the end of the file if it exists + 'b' binary mode + 't' text mode (default) + '+' open a disk file for updating (reading and writing) + ========= =============================================================== + + The default mode is 'rt' (open for reading text). For binary random + access, the mode 'w+b' opens and truncates the file to 0 bytes, while + 'r+b' opens the file without truncation. The 'x' mode implies 'w' and + raises an `FileExistsError` if the file already exists. + + Python distinguishes between files opened in binary and text modes, + even when the underlying operating system doesn't. Files opened in + binary mode (appending 'b' to the mode argument) return contents as + bytes objects without any decoding. In text mode (the default, or when + 't' is appended to the mode argument), the contents of the file are + returned as strings, the bytes having been first decoded using a + platform-dependent encoding or using the specified encoding if given. + + buffering is an optional integer used to set the buffering policy. + Pass 0 to switch buffering off (only allowed in binary mode), 1 to select + line buffering (only usable in text mode), and an integer > 1 to indicate + the size of a fixed-size chunk buffer. When no buffering argument is + given, the default buffering policy works as follows: + + * Binary files are buffered in fixed-size chunks; the size of the buffer + is max(min(blocksize, 8 MiB), DEFAULT_BUFFER_SIZE) + when the device block size is available. + On most systems, the buffer will typically be 128 kilobytes long. + + * "Interactive" text files (files for which isatty() returns True) + use line buffering. Other text files use the policy described above + for binary files. + + encoding is the str name of the encoding used to decode or encode the + file. This should only be used in text mode. The default encoding is + platform dependent, but any encoding supported by Python can be + passed. See the codecs module for the list of supported encodings. + + errors is an optional string that specifies how encoding errors are to + be handled---this argument should not be used in binary mode. Pass + 'strict' to raise a ValueError exception if there is an encoding error + (the default of None has the same effect), or pass 'ignore' to ignore + errors. (Note that ignoring encoding errors can lead to data loss.) + See the documentation for codecs.register for a list of the permitted + encoding error strings. + + newline is a string controlling how universal newlines works (it only + applies to text mode). It can be None, '', '\n', '\r', and '\r\n'. It works + as follows: + + * On input, if newline is None, universal newlines mode is + enabled. Lines in the input can end in '\n', '\r', or '\r\n', and + these are translated into '\n' before being returned to the + caller. If it is '', universal newline mode is enabled, but line + endings are returned to the caller untranslated. If it has any of + the other legal values, input lines are only terminated by the given + string, and the line ending is returned to the caller untranslated. + + * On output, if newline is None, any '\n' characters written are + translated to the system default line separator, os.linesep. If + newline is '', no translation takes place. If newline is any of the + other legal values, any '\n' characters written are translated to + the given string. + + closedfd is a bool. If closefd is False, the underlying file descriptor will + be kept open when the file is closed. This does not work when a file name is + given and must be True in that case. + + The newly created file is non-inheritable. + + A custom opener can be used by passing a callable as *opener*. The + underlying file descriptor for the file object is then obtained by calling + *opener* with (*file*, *flags*). *opener* must return an open file + descriptor (passing os.open as *opener* results in functionality similar to + passing None). + + open() returns a file object whose type depends on the mode, and + through which the standard file operations such as reading and writing + are performed. When open() is used to open a file in a text mode ('w', + 'r', 'wt', 'rt', etc.), it returns a TextIOWrapper. When used to open + a file in a binary mode, the returned class varies: in read binary + mode, it returns a BufferedReader; in write binary and append binary + modes, it returns a BufferedWriter, and in read/write mode, it returns + a BufferedRandom. + + It is also possible to use a string or bytearray as a file for both + reading and writing. For strings StringIO can be used like a file + opened in a text mode, and for bytes a BytesIO can be used like a file + opened in a binary mode. + """ + if not isinstance(file, int): + file = os.fspath(file) + if not isinstance(file, (str, bytes, int)): + raise TypeError("invalid file: %r" % file) + if not isinstance(mode, str): + raise TypeError("invalid mode: %r" % mode) + if not isinstance(buffering, int): + raise TypeError("invalid buffering: %r" % buffering) + if encoding is not None and not isinstance(encoding, str): + raise TypeError("invalid encoding: %r" % encoding) + if errors is not None and not isinstance(errors, str): + raise TypeError("invalid errors: %r" % errors) + modes = set(mode) + if modes - set("axrwb+t") or len(mode) > len(modes): + raise ValueError("invalid mode: %r" % mode) + creating = "x" in modes + reading = "r" in modes + writing = "w" in modes + appending = "a" in modes + updating = "+" in modes + text = "t" in modes + binary = "b" in modes + if text and binary: + raise ValueError("can't have text and binary mode at once") + if creating + reading + writing + appending > 1: + raise ValueError("can't have read/write/append mode at once") + if not (creating or reading or writing or appending): + raise ValueError("must have exactly one of read/write/append mode") + if binary and encoding is not None: + raise ValueError("binary mode doesn't take an encoding argument") + if binary and errors is not None: + raise ValueError("binary mode doesn't take an errors argument") + if binary and newline is not None: + raise ValueError("binary mode doesn't take a newline argument") + if binary and buffering == 1: + import warnings + warnings.warn("line buffering (buffering=1) isn't supported in binary " + "mode, the default buffer size will be used", + RuntimeWarning, 2) + raw = FileIO(file, + (creating and "x" or "") + + (reading and "r" or "") + + (writing and "w" or "") + + (appending and "a" or "") + + (updating and "+" or ""), + closefd, opener=opener) + result = raw + try: + line_buffering = False + if buffering == 1 or buffering < 0 and raw._isatty_open_only(): + buffering = -1 + line_buffering = True + if buffering < 0: + buffering = max(min(raw._blksize, 8192 * 1024), DEFAULT_BUFFER_SIZE) + if buffering < 0: + raise ValueError("invalid buffering size") + if buffering == 0: + if binary: + return result + raise ValueError("can't have unbuffered text I/O") + if updating: + buffer = BufferedRandom(raw, buffering) + elif creating or writing or appending: + buffer = BufferedWriter(raw, buffering) + elif reading: + buffer = BufferedReader(raw, buffering) + else: + raise ValueError("unknown mode: %r" % mode) + result = buffer + if binary: + return result + encoding = text_encoding(encoding) + text = TextIOWrapper(buffer, encoding, errors, newline, line_buffering) + result = text + text.mode = mode + return result + except: + result.close() + raise + +# Define a default pure-Python implementation for open_code() +# that does not allow hooks. Warn on first use. Defined for tests. +def _open_code_with_warning(path): + """Opens the provided file with mode ``'rb'``. This function + should be used when the intent is to treat the contents as + executable code. + + ``path`` should be an absolute path. + + When supported by the runtime, this function can be hooked + in order to allow embedders more control over code files. + This functionality is not supported on the current runtime. + """ + import warnings + warnings.warn("_pyio.open_code() may not be using hooks", + RuntimeWarning, 2) + return open(path, "rb") + +try: + open_code = io.open_code +except AttributeError: + open_code = _open_code_with_warning + + +# In normal operation, both `UnsupportedOperation`s should be bound to the +# same object. +try: + UnsupportedOperation = io.UnsupportedOperation +except AttributeError: + class UnsupportedOperation(OSError, ValueError): + pass + + +class IOBase(metaclass=abc.ABCMeta): + + """The abstract base class for all I/O classes. + + This class provides dummy implementations for many methods that + derived classes can override selectively; the default implementations + represent a file that cannot be read, written or seeked. + + Even though IOBase does not declare read or write because + their signatures will vary, implementations and clients should + consider those methods part of the interface. Also, implementations + may raise UnsupportedOperation when operations they do not support are + called. + + The basic type used for binary data read from or written to a file is + bytes. Other bytes-like objects are accepted as method arguments too. + Text I/O classes work with str data. + + Note that calling any method (even inquiries) on a closed stream is + undefined. Implementations may raise OSError in this case. + + IOBase (and its subclasses) support the iterator protocol, meaning + that an IOBase object can be iterated over yielding the lines in a + stream. + + IOBase also supports the :keyword:`with` statement. In this example, + fp is closed after the suite of the with statement is complete: + + with open('spam.txt', 'r') as fp: + fp.write('Spam and eggs!') + """ + + ### Internal ### + + def _unsupported(self, name): + """Internal: raise an OSError exception for unsupported operations.""" + raise UnsupportedOperation("%s.%s() not supported" % + (self.__class__.__name__, name)) + + ### Positioning ### + + def seek(self, pos, whence=0): + """Change stream position. + + Change the stream position to byte offset pos. Argument pos is + interpreted relative to the position indicated by whence. Values + for whence are ints: + + * 0 -- start of stream (the default); offset should be zero or positive + * 1 -- current stream position; offset may be negative + * 2 -- end of stream; offset is usually negative + Some operating systems / file systems could provide additional values. + + Return an int indicating the new absolute position. + """ + self._unsupported("seek") + + def tell(self): + """Return an int indicating the current stream position.""" + return self.seek(0, 1) + + def truncate(self, pos=None): + """Truncate file to size bytes. + + Size defaults to the current IO position as reported by tell(). Return + the new size. + """ + self._unsupported("truncate") + + ### Flush and close ### + + def flush(self): + """Flush write buffers, if applicable. + + This is not implemented for read-only and non-blocking streams. + """ + self._checkClosed() + # XXX Should this return the number of bytes written??? + + __closed = False + + def close(self): + """Flush and close the IO object. + + This method has no effect if the file is already closed. + """ + if not self.__closed: + try: + self.flush() + finally: + self.__closed = True + + def __del__(self): + """Destructor. Calls close().""" + try: + closed = self.closed + except AttributeError: + # If getting closed fails, then the object is probably + # in an unusable state, so ignore. + return + + if closed: + return + + if dealloc_warn := getattr(self, "_dealloc_warn", None): + dealloc_warn(self) + + # If close() fails, the caller logs the exception with + # sys.unraisablehook. close() must be called at the end at __del__(). + self.close() + + ### Inquiries ### + + def seekable(self): + """Return a bool indicating whether object supports random access. + + If False, seek(), tell() and truncate() will raise OSError. + This method may need to do a test seek(). + """ + return False + + def _checkSeekable(self, msg=None): + """Internal: raise UnsupportedOperation if file is not seekable + """ + if not self.seekable(): + raise UnsupportedOperation("File or stream is not seekable." + if msg is None else msg) + + def readable(self): + """Return a bool indicating whether object was opened for reading. + + If False, read() will raise OSError. + """ + return False + + def _checkReadable(self, msg=None): + """Internal: raise UnsupportedOperation if file is not readable + """ + if not self.readable(): + raise UnsupportedOperation("File or stream is not readable." + if msg is None else msg) + + def writable(self): + """Return a bool indicating whether object was opened for writing. + + If False, write() and truncate() will raise OSError. + """ + return False + + def _checkWritable(self, msg=None): + """Internal: raise UnsupportedOperation if file is not writable + """ + if not self.writable(): + raise UnsupportedOperation("File or stream is not writable." + if msg is None else msg) + + @property + def closed(self): + """closed: bool. True iff the file has been closed. + + For backwards compatibility, this is a property, not a predicate. + """ + return self.__closed + + def _checkClosed(self, msg=None): + """Internal: raise a ValueError if file is closed + """ + if self.closed: + raise ValueError("I/O operation on closed file." + if msg is None else msg) + + ### Context manager ### + + def __enter__(self): # That's a forward reference + """Context management protocol. Returns self (an instance of IOBase).""" + self._checkClosed() + return self + + def __exit__(self, *args): + """Context management protocol. Calls close()""" + self.close() + + ### Lower-level APIs ### + + # XXX Should these be present even if unimplemented? + + def fileno(self): + """Returns underlying file descriptor (an int) if one exists. + + An OSError is raised if the IO object does not use a file descriptor. + """ + self._unsupported("fileno") + + def isatty(self): + """Return a bool indicating whether this is an 'interactive' stream. + + Return False if it can't be determined. + """ + self._checkClosed() + return False + + ### Readline[s] and writelines ### + + def readline(self, size=-1): + r"""Read and return a line of bytes from the stream. + + If size is specified, at most size bytes will be read. + Size should be an int. + + The line terminator is always b'\n' for binary files; for text + files, the newlines argument to open can be used to select the line + terminator(s) recognized. + """ + # For backwards compatibility, a (slowish) readline(). + if hasattr(self, "peek"): + def nreadahead(): + readahead = self.peek(1) + if not readahead: + return 1 + n = (readahead.find(b"\n") + 1) or len(readahead) + if size >= 0: + n = min(n, size) + return n + else: + def nreadahead(): + return 1 + if size is None: + size = -1 + else: + try: + size_index = size.__index__ + except AttributeError: + raise TypeError(f"{size!r} is not an integer") + else: + size = size_index() + res = bytearray() + while size < 0 or len(res) < size: + b = self.read(nreadahead()) + if not b: + break + res += b + if res.endswith(b"\n"): + break + return bytes(res) + + def __iter__(self): + self._checkClosed() + return self + + def __next__(self): + line = self.readline() + if not line: + raise StopIteration + return line + + def readlines(self, hint=None): + """Return a list of lines from the stream. + + hint can be specified to control the number of lines read: no more + lines will be read if the total size (in bytes/characters) of all + lines so far exceeds hint. + """ + if hint is None or hint <= 0: + return list(self) + n = 0 + lines = [] + for line in self: + lines.append(line) + n += len(line) + if n >= hint: + break + return lines + + def writelines(self, lines): + """Write a list of lines to the stream. + + Line separators are not added, so it is usual for each of the lines + provided to have a line separator at the end. + """ + self._checkClosed() + for line in lines: + self.write(line) + +io.IOBase.register(IOBase) + + +class RawIOBase(IOBase): + + """Base class for raw binary I/O.""" + + # The read() method is implemented by calling readinto(); derived + # classes that want to support read() only need to implement + # readinto() as a primitive operation. In general, readinto() can be + # more efficient than read(). + + # (It would be tempting to also provide an implementation of + # readinto() in terms of read(), in case the latter is a more suitable + # primitive operation, but that would lead to nasty recursion in case + # a subclass doesn't implement either.) + + def read(self, size=-1): + """Read and return up to size bytes, where size is an int. + + Returns an empty bytes object on EOF, or None if the object is + set not to block and has no data to read. + """ + if size is None: + size = -1 + if size < 0: + return self.readall() + b = bytearray(size.__index__()) + n = self.readinto(b) + if n is None: + return None + if n < 0 or n > len(b): + raise ValueError(f"readinto returned {n} outside buffer size {len(b)}") + del b[n:] + return bytes(b) + + def readall(self): + """Read until EOF, using multiple read() call.""" + res = bytearray() + while data := self.read(DEFAULT_BUFFER_SIZE): + res += data + if res: + return bytes(res) + else: + # b'' or None + return data + + def readinto(self, b): + """Read bytes into a pre-allocated bytes-like object b. + + Returns an int representing the number of bytes read (0 for EOF), or + None if the object is set not to block and has no data to read. + """ + self._unsupported("readinto") + + def write(self, b): + """Write the given buffer to the IO stream. + + Returns the number of bytes written, which may be less than the + length of b in bytes. + """ + self._unsupported("write") + +io.RawIOBase.register(RawIOBase) + + +class BufferedIOBase(IOBase): + + """Base class for buffered IO objects. + + The main difference with RawIOBase is that the read() method + supports omitting the size argument, and does not have a default + implementation that defers to readinto(). + + In addition, read(), readinto() and write() may raise + BlockingIOError if the underlying raw stream is in non-blocking + mode and not ready; unlike their raw counterparts, they will never + return None. + + A typical implementation should not inherit from a RawIOBase + implementation, but wrap one. + """ + + def read(self, size=-1): + """Read and return up to size bytes, where size is an int. + + If the argument is omitted, None, or negative, reads and + returns all data until EOF. + + If the argument is positive, and the underlying raw stream is + not 'interactive', multiple raw reads may be issued to satisfy + the byte count (unless EOF is reached first). But for + interactive raw streams (XXX and for pipes?), at most one raw + read will be issued, and a short result does not imply that + EOF is imminent. + + Returns an empty bytes array on EOF. + + Raises BlockingIOError if the underlying raw stream has no + data at the moment. + """ + self._unsupported("read") + + def read1(self, size=-1): + """Read up to size bytes with at most one read() system call, + where size is an int. + """ + self._unsupported("read1") + + def readinto(self, b): + """Read bytes into a pre-allocated bytes-like object b. + + Like read(), this may issue multiple reads to the underlying raw + stream, unless the latter is 'interactive'. + + Returns an int representing the number of bytes read (0 for EOF). + + Raises BlockingIOError if the underlying raw stream has no + data at the moment. + """ + + return self._readinto(b, read1=False) + + def readinto1(self, b): + """Read bytes into buffer *b*, using at most one system call + + Returns an int representing the number of bytes read (0 for EOF). + + Raises BlockingIOError if the underlying raw stream has no + data at the moment. + """ + + return self._readinto(b, read1=True) + + def _readinto(self, b, read1): + if not isinstance(b, memoryview): + b = memoryview(b) + b = b.cast('B') + + if read1: + data = self.read1(len(b)) + else: + data = self.read(len(b)) + n = len(data) + + b[:n] = data + + return n + + def write(self, b): + """Write the given bytes buffer to the IO stream. + + Return the number of bytes written, which is always the length of b + in bytes. + + Raises BlockingIOError if the buffer is full and the + underlying raw stream cannot accept more data at the moment. + """ + self._unsupported("write") + + def detach(self): + """ + Separate the underlying raw stream from the buffer and return it. + + After the raw stream has been detached, the buffer is in an unusable + state. + """ + self._unsupported("detach") + +io.BufferedIOBase.register(BufferedIOBase) + + +class _BufferedIOMixin(BufferedIOBase): + + """A mixin implementation of BufferedIOBase with an underlying raw stream. + + This passes most requests on to the underlying raw stream. It + does *not* provide implementations of read(), readinto() or + write(). + """ + + def __init__(self, raw): + self._raw = raw + + ### Positioning ### + + def seek(self, pos, whence=0): + new_position = self.raw.seek(pos, whence) + if new_position < 0: + raise OSError("seek() returned an invalid position") + return new_position + + def tell(self): + pos = self.raw.tell() + if pos < 0: + raise OSError("tell() returned an invalid position") + return pos + + def truncate(self, pos=None): + self._checkClosed() + self._checkWritable() + + # Flush the stream. We're mixing buffered I/O with lower-level I/O, + # and a flush may be necessary to synch both views of the current + # file state. + self.flush() + + if pos is None: + pos = self.tell() + # XXX: Should seek() be used, instead of passing the position + # XXX directly to truncate? + return self.raw.truncate(pos) + + ### Flush and close ### + + def flush(self): + if self.closed: + raise ValueError("flush on closed file") + self.raw.flush() + + def close(self): + if self.raw is not None and not self.closed: + try: + # may raise BlockingIOError or BrokenPipeError etc + self.flush() + finally: + self.raw.close() + + def detach(self): + if self.raw is None: + raise ValueError("raw stream already detached") + self.flush() + raw = self._raw + self._raw = None + return raw + + ### Inquiries ### + + def seekable(self): + return self.raw.seekable() + + @property + def raw(self): + return self._raw + + @property + def closed(self): + return self.raw.closed + + @property + def name(self): + return self.raw.name + + @property + def mode(self): + return self.raw.mode + + def __getstate__(self): + raise TypeError(f"cannot pickle {self.__class__.__name__!r} object") + + def __repr__(self): + modname = self.__class__.__module__ + clsname = self.__class__.__qualname__ + try: + name = self.name + except AttributeError: + return "<{}.{}>".format(modname, clsname) + else: + return "<{}.{} name={!r}>".format(modname, clsname, name) + + def _dealloc_warn(self, source): + if dealloc_warn := getattr(self.raw, "_dealloc_warn", None): + dealloc_warn(source) + + ### Lower-level APIs ### + + def fileno(self): + return self.raw.fileno() + + def isatty(self): + return self.raw.isatty() + + +class BytesIO(BufferedIOBase): + + """Buffered I/O implementation using an in-memory bytes buffer.""" + + # Initialize _buffer as soon as possible since it's used by __del__() + # which calls close() + _buffer = None + + def __init__(self, initial_bytes=None): + buf = bytearray() + if initial_bytes is not None: + buf += initial_bytes + self._buffer = buf + self._pos = 0 + + def __getstate__(self): + if self.closed: + raise ValueError("__getstate__ on closed file") + return self.__dict__.copy() + + def getvalue(self): + """Return the bytes value (contents) of the buffer + """ + if self.closed: + raise ValueError("getvalue on closed file") + return bytes(self._buffer) + + def getbuffer(self): + """Return a readable and writable view of the buffer. + """ + if self.closed: + raise ValueError("getbuffer on closed file") + return memoryview(self._buffer) + + def close(self): + if self._buffer is not None: + self._buffer.clear() + super().close() + + def read(self, size=-1): + if self.closed: + raise ValueError("read from closed file") + if size is None: + size = -1 + else: + try: + size_index = size.__index__ + except AttributeError: + raise TypeError(f"{size!r} is not an integer") + else: + size = size_index() + if size < 0: + size = len(self._buffer) + if len(self._buffer) <= self._pos: + return b"" + newpos = min(len(self._buffer), self._pos + size) + b = self._buffer[self._pos : newpos] + self._pos = newpos + return bytes(b) + + def read1(self, size=-1): + """This is the same as read. + """ + return self.read(size) + + def write(self, b): + if isinstance(b, str): + raise TypeError("can't write str to binary stream") + with memoryview(b) as view: + if self.closed: + raise ValueError("write to closed file") + + n = view.nbytes # Size of any bytes-like object + if n == 0: + return 0 + + pos = self._pos + if pos > len(self._buffer): + # Pad buffer to pos with null bytes. + self._buffer.resize(pos) + self._buffer[pos:pos + n] = view + self._pos += n + return n + + def seek(self, pos, whence=0): + if self.closed: + raise ValueError("seek on closed file") + try: + pos_index = pos.__index__ + except AttributeError: + raise TypeError(f"{pos!r} is not an integer") + else: + pos = pos_index() + if whence == 0: + if pos < 0: + raise ValueError("negative seek position %r" % (pos,)) + self._pos = pos + elif whence == 1: + self._pos = max(0, self._pos + pos) + elif whence == 2: + self._pos = max(0, len(self._buffer) + pos) + else: + raise ValueError("unsupported whence value") + return self._pos + + def tell(self): + if self.closed: + raise ValueError("tell on closed file") + return self._pos + + def truncate(self, pos=None): + if self.closed: + raise ValueError("truncate on closed file") + if pos is None: + pos = self._pos + else: + try: + pos_index = pos.__index__ + except AttributeError: + raise TypeError(f"{pos!r} is not an integer") + else: + pos = pos_index() + if pos < 0: + raise ValueError("negative truncate position %r" % (pos,)) + del self._buffer[pos:] + return pos + + def readable(self): + if self.closed: + raise ValueError("I/O operation on closed file.") + return True + + def writable(self): + if self.closed: + raise ValueError("I/O operation on closed file.") + return True + + def seekable(self): + if self.closed: + raise ValueError("I/O operation on closed file.") + return True + + +class BufferedReader(_BufferedIOMixin): + + """BufferedReader(raw[, buffer_size]) + + A buffer for a readable, sequential BaseRawIO object. + + The constructor creates a BufferedReader for the given readable raw + stream and buffer_size. If buffer_size is omitted, DEFAULT_BUFFER_SIZE + is used. + """ + + def __init__(self, raw, buffer_size=DEFAULT_BUFFER_SIZE): + """Create a new buffered reader using the given readable raw IO object. + """ + if not raw.readable(): + raise OSError('"raw" argument must be readable.') + + _BufferedIOMixin.__init__(self, raw) + if buffer_size <= 0: + raise ValueError("invalid buffer size") + self.buffer_size = buffer_size + self._reset_read_buf() + self._read_lock = Lock() + + def readable(self): + return self.raw.readable() + + def _reset_read_buf(self): + self._read_buf = b"" + self._read_pos = 0 + + def read(self, size=None): + """Read size bytes. + + Returns exactly size bytes of data unless the underlying raw IO + stream reaches EOF or if the call would block in non-blocking + mode. If size is negative, read until EOF or until read() would + block. + """ + if size is not None and size < -1: + raise ValueError("invalid number of bytes to read") + with self._read_lock: + return self._read_unlocked(size) + + def _read_unlocked(self, n=None): + nodata_val = b"" + empty_values = (b"", None) + buf = self._read_buf + pos = self._read_pos + + # Special case for when the number of bytes to read is unspecified. + if n is None or n == -1: + self._reset_read_buf() + if hasattr(self.raw, 'readall'): + chunk = self.raw.readall() + if chunk is None: + return buf[pos:] or None + else: + return buf[pos:] + chunk + chunks = [buf[pos:]] # Strip the consumed bytes. + current_size = 0 + while True: + # Read until EOF or until read() would block. + chunk = self.raw.read() + if chunk in empty_values: + nodata_val = chunk + break + current_size += len(chunk) + chunks.append(chunk) + return b"".join(chunks) or nodata_val + + # The number of bytes to read is specified, return at most n bytes. + avail = len(buf) - pos # Length of the available buffered data. + if n <= avail: + # Fast path: the data to read is fully buffered. + self._read_pos += n + return buf[pos:pos+n] + # Slow path: read from the stream until enough bytes are read, + # or until an EOF occurs or until read() would block. + chunks = [buf[pos:]] + wanted = max(self.buffer_size, n) + while avail < n: + chunk = self.raw.read(wanted) + if chunk in empty_values: + nodata_val = chunk + break + avail += len(chunk) + chunks.append(chunk) + # n is more than avail only when an EOF occurred or when + # read() would have blocked. + n = min(n, avail) + out = b"".join(chunks) + self._read_buf = out[n:] # Save the extra data in the buffer. + self._read_pos = 0 + return out[:n] if out else nodata_val + + def peek(self, size=0): + """Returns buffered bytes without advancing the position. + + The argument indicates a desired minimal number of bytes; we + do at most one raw read to satisfy it. We never return more + than self.buffer_size. + """ + self._checkClosed("peek of closed file") + with self._read_lock: + return self._peek_unlocked(size) + + def _peek_unlocked(self, n=0): + want = min(n, self.buffer_size) + have = len(self._read_buf) - self._read_pos + if have < want or have <= 0: + to_read = self.buffer_size - have + current = self.raw.read(to_read) + if current: + self._read_buf = self._read_buf[self._read_pos:] + current + self._read_pos = 0 + return self._read_buf[self._read_pos:] + + def read1(self, size=-1): + """Reads up to size bytes, with at most one read() system call.""" + # Returns up to size bytes. If at least one byte is buffered, we + # only return buffered bytes. Otherwise, we do one raw read. + self._checkClosed("read of closed file") + if size < 0: + size = self.buffer_size + if size == 0: + return b"" + with self._read_lock: + self._peek_unlocked(1) + return self._read_unlocked( + min(size, len(self._read_buf) - self._read_pos)) + + # Implementing readinto() and readinto1() is not strictly necessary (we + # could rely on the base class that provides an implementation in terms of + # read() and read1()). We do it anyway to keep the _pyio implementation + # similar to the io implementation (which implements the methods for + # performance reasons). + def _readinto(self, buf, read1): + """Read data into *buf* with at most one system call.""" + + self._checkClosed("readinto of closed file") + + # Need to create a memoryview object of type 'b', otherwise + # we may not be able to assign bytes to it, and slicing it + # would create a new object. + if not isinstance(buf, memoryview): + buf = memoryview(buf) + if buf.nbytes == 0: + return 0 + buf = buf.cast('B') + + written = 0 + with self._read_lock: + while written < len(buf): + + # First try to read from internal buffer + avail = min(len(self._read_buf) - self._read_pos, len(buf)) + if avail: + buf[written:written+avail] = \ + self._read_buf[self._read_pos:self._read_pos+avail] + self._read_pos += avail + written += avail + if written == len(buf): + break + + # If remaining space in callers buffer is larger than + # internal buffer, read directly into callers buffer + if len(buf) - written > self.buffer_size: + n = self.raw.readinto(buf[written:]) + if not n: + break # eof + written += n + + # Otherwise refill internal buffer - unless we're + # in read1 mode and already got some data + elif not (read1 and written): + if not self._peek_unlocked(1): + break # eof + + # In readinto1 mode, return as soon as we have some data + if read1 and written: + break + + return written + + def tell(self): + # GH-95782: Keep return value non-negative + return max(_BufferedIOMixin.tell(self) - len(self._read_buf) + self._read_pos, 0) + + def seek(self, pos, whence=0): + if whence not in valid_seek_flags: + raise ValueError("invalid whence value") + self._checkClosed("seek of closed file") + with self._read_lock: + if whence == 1: + pos -= len(self._read_buf) - self._read_pos + pos = _BufferedIOMixin.seek(self, pos, whence) + self._reset_read_buf() + return pos + +class BufferedWriter(_BufferedIOMixin): + + """A buffer for a writeable sequential RawIO object. + + The constructor creates a BufferedWriter for the given writeable raw + stream. If the buffer_size is not given, it defaults to + DEFAULT_BUFFER_SIZE. + """ + + def __init__(self, raw, buffer_size=DEFAULT_BUFFER_SIZE): + if not raw.writable(): + raise OSError('"raw" argument must be writable.') + + _BufferedIOMixin.__init__(self, raw) + if buffer_size <= 0: + raise ValueError("invalid buffer size") + self.buffer_size = buffer_size + self._write_buf = bytearray() + self._write_lock = Lock() + + def writable(self): + return self.raw.writable() + + def write(self, b): + if isinstance(b, str): + raise TypeError("can't write str to binary stream") + with self._write_lock: + if self.closed: + raise ValueError("write to closed file") + # XXX we can implement some more tricks to try and avoid + # partial writes + if len(self._write_buf) > self.buffer_size: + # We're full, so let's pre-flush the buffer. (This may + # raise BlockingIOError with characters_written == 0.) + self._flush_unlocked() + before = len(self._write_buf) + self._write_buf.extend(b) + written = len(self._write_buf) - before + if len(self._write_buf) > self.buffer_size: + try: + self._flush_unlocked() + except BlockingIOError as e: + if len(self._write_buf) > self.buffer_size: + # We've hit the buffer_size. We have to accept a partial + # write and cut back our buffer. + overage = len(self._write_buf) - self.buffer_size + written -= overage + self._write_buf = self._write_buf[:self.buffer_size] + raise BlockingIOError(e.errno, e.strerror, written) + return written + + def truncate(self, pos=None): + with self._write_lock: + self._flush_unlocked() + if pos is None: + pos = self.raw.tell() + return self.raw.truncate(pos) + + def flush(self): + with self._write_lock: + self._flush_unlocked() + + def _flush_unlocked(self): + if self.closed: + raise ValueError("flush on closed file") + while self._write_buf: + try: + n = self.raw.write(self._write_buf) + except BlockingIOError: + raise RuntimeError("self.raw should implement RawIOBase: it " + "should not raise BlockingIOError") + if n is None: + raise BlockingIOError( + errno.EAGAIN, + "write could not complete without blocking", 0) + if n > len(self._write_buf) or n < 0: + raise OSError("write() returned incorrect number of bytes") + del self._write_buf[:n] + + def tell(self): + return _BufferedIOMixin.tell(self) + len(self._write_buf) + + def seek(self, pos, whence=0): + if whence not in valid_seek_flags: + raise ValueError("invalid whence value") + with self._write_lock: + self._flush_unlocked() + return _BufferedIOMixin.seek(self, pos, whence) + + def close(self): + with self._write_lock: + if self.raw is None or self.closed: + return + # We have to release the lock and call self.flush() (which will + # probably just re-take the lock) in case flush has been overridden in + # a subclass or the user set self.flush to something. This is the same + # behavior as the C implementation. + try: + # may raise BlockingIOError or BrokenPipeError etc + self.flush() + finally: + with self._write_lock: + self.raw.close() + + +class BufferedRWPair(BufferedIOBase): + + """A buffered reader and writer object together. + + A buffered reader object and buffered writer object put together to + form a sequential IO object that can read and write. This is typically + used with a socket or two-way pipe. + + reader and writer are RawIOBase objects that are readable and + writeable respectively. If the buffer_size is omitted it defaults to + DEFAULT_BUFFER_SIZE. + """ + + # XXX The usefulness of this (compared to having two separate IO + # objects) is questionable. + + def __init__(self, reader, writer, buffer_size=DEFAULT_BUFFER_SIZE): + """Constructor. + + The arguments are two RawIO instances. + """ + if not reader.readable(): + raise OSError('"reader" argument must be readable.') + + if not writer.writable(): + raise OSError('"writer" argument must be writable.') + + self.reader = BufferedReader(reader, buffer_size) + self.writer = BufferedWriter(writer, buffer_size) + + def read(self, size=-1): + if size is None: + size = -1 + return self.reader.read(size) + + def readinto(self, b): + return self.reader.readinto(b) + + def write(self, b): + return self.writer.write(b) + + def peek(self, size=0): + return self.reader.peek(size) + + def read1(self, size=-1): + return self.reader.read1(size) + + def readinto1(self, b): + return self.reader.readinto1(b) + + def readable(self): + return self.reader.readable() + + def writable(self): + return self.writer.writable() + + def flush(self): + return self.writer.flush() + + def close(self): + try: + self.writer.close() + finally: + self.reader.close() + + def isatty(self): + return self.reader.isatty() or self.writer.isatty() + + @property + def closed(self): + return self.writer.closed + + +class BufferedRandom(BufferedWriter, BufferedReader): + + """A buffered interface to random access streams. + + The constructor creates a reader and writer for a seekable stream, + raw, given in the first argument. If the buffer_size is omitted it + defaults to DEFAULT_BUFFER_SIZE. + """ + + def __init__(self, raw, buffer_size=DEFAULT_BUFFER_SIZE): + raw._checkSeekable() + BufferedReader.__init__(self, raw, buffer_size) + BufferedWriter.__init__(self, raw, buffer_size) + + def seek(self, pos, whence=0): + if whence not in valid_seek_flags: + raise ValueError("invalid whence value") + self.flush() + if self._read_buf: + # Undo read ahead. + with self._read_lock: + self.raw.seek(self._read_pos - len(self._read_buf), 1) + # First do the raw seek, then empty the read buffer, so that + # if the raw seek fails, we don't lose buffered data forever. + pos = self.raw.seek(pos, whence) + with self._read_lock: + self._reset_read_buf() + if pos < 0: + raise OSError("seek() returned invalid position") + return pos + + def tell(self): + if self._write_buf: + return BufferedWriter.tell(self) + else: + return BufferedReader.tell(self) + + def truncate(self, pos=None): + if pos is None: + pos = self.tell() + # Use seek to flush the read buffer. + return BufferedWriter.truncate(self, pos) + + def read(self, size=None): + if size is None: + size = -1 + self.flush() + return BufferedReader.read(self, size) + + def readinto(self, b): + self.flush() + return BufferedReader.readinto(self, b) + + def peek(self, size=0): + self.flush() + return BufferedReader.peek(self, size) + + def read1(self, size=-1): + self.flush() + return BufferedReader.read1(self, size) + + def readinto1(self, b): + self.flush() + return BufferedReader.readinto1(self, b) + + def write(self, b): + if self._read_buf: + # Undo readahead + with self._read_lock: + self.raw.seek(self._read_pos - len(self._read_buf), 1) + self._reset_read_buf() + return BufferedWriter.write(self, b) + + +def _new_buffersize(bytes_read): + # Parallels _io/fileio.c new_buffersize + if bytes_read > 65536: + addend = bytes_read >> 3 + else: + addend = 256 + bytes_read + if addend < DEFAULT_BUFFER_SIZE: + addend = DEFAULT_BUFFER_SIZE + return bytes_read + addend + + +class FileIO(RawIOBase): + _fd = -1 + _created = False + _readable = False + _writable = False + _appending = False + _seekable = None + _closefd = True + + def __init__(self, file, mode='r', closefd=True, opener=None): + """Open a file. The mode can be 'r' (default), 'w', 'x' or 'a' for reading, + writing, exclusive creation or appending. The file will be created if it + doesn't exist when opened for writing or appending; it will be truncated + when opened for writing. A FileExistsError will be raised if it already + exists when opened for creating. Opening a file for creating implies + writing so this mode behaves in a similar way to 'w'. Add a '+' to the mode + to allow simultaneous reading and writing. A custom opener can be used by + passing a callable as *opener*. The underlying file descriptor for the file + object is then obtained by calling opener with (*name*, *flags*). + *opener* must return an open file descriptor (passing os.open as *opener* + results in functionality similar to passing None). + """ + if self._fd >= 0: + # Have to close the existing file first. + self._stat_atopen = None + try: + if self._closefd: + os.close(self._fd) + finally: + self._fd = -1 + + if isinstance(file, float): + raise TypeError('integer argument expected, got float') + if isinstance(file, int): + if isinstance(file, bool): + import warnings + warnings.warn("bool is used as a file descriptor", + RuntimeWarning, stacklevel=2) + file = int(file) + fd = file + if fd < 0: + raise ValueError('negative file descriptor') + else: + fd = -1 + + if not isinstance(mode, str): + raise TypeError('invalid mode: %s' % (mode,)) + if not set(mode) <= set('xrwab+'): + raise ValueError('invalid mode: %s' % (mode,)) + if sum(c in 'rwax' for c in mode) != 1 or mode.count('+') > 1: + raise ValueError('Must have exactly one of create/read/write/append ' + 'mode and at most one plus') + + if 'x' in mode: + self._created = True + self._writable = True + flags = os.O_EXCL | os.O_CREAT + elif 'r' in mode: + self._readable = True + flags = 0 + elif 'w' in mode: + self._writable = True + flags = os.O_CREAT | os.O_TRUNC + elif 'a' in mode: + self._writable = True + self._appending = True + flags = os.O_APPEND | os.O_CREAT + + if '+' in mode: + self._readable = True + self._writable = True + + if self._readable and self._writable: + flags |= os.O_RDWR + elif self._readable: + flags |= os.O_RDONLY + else: + flags |= os.O_WRONLY + + flags |= getattr(os, 'O_BINARY', 0) + + noinherit_flag = (getattr(os, 'O_NOINHERIT', 0) or + getattr(os, 'O_CLOEXEC', 0)) + flags |= noinherit_flag + + owned_fd = None + try: + if fd < 0: + if not closefd: + raise ValueError('Cannot use closefd=False with file name') + if opener is None: + fd = os.open(file, flags, 0o666) + else: + fd = opener(file, flags) + if not isinstance(fd, int): + raise TypeError('expected integer from opener') + if fd < 0: + # bpo-27066: Raise a ValueError for bad value. + raise ValueError(f'opener returned {fd}') + owned_fd = fd + if not noinherit_flag: + os.set_inheritable(fd, False) + + self._closefd = closefd + self._stat_atopen = os.fstat(fd) + try: + if stat.S_ISDIR(self._stat_atopen.st_mode): + raise IsADirectoryError(errno.EISDIR, + os.strerror(errno.EISDIR), file) + except AttributeError: + # Ignore the AttributeError if stat.S_ISDIR or errno.EISDIR + # don't exist. + pass + + if _setmode: + # don't translate newlines (\r\n <=> \n) + _setmode(fd, os.O_BINARY) + + self.name = file + if self._appending: + # For consistent behaviour, we explicitly seek to the + # end of file (otherwise, it might be done only on the + # first write()). + try: + os.lseek(fd, 0, SEEK_END) + except OSError as e: + if e.errno != errno.ESPIPE: + raise + except: + self._stat_atopen = None + if owned_fd is not None: + os.close(owned_fd) + raise + self._fd = fd + + def _dealloc_warn(self, source): + if self._fd >= 0 and self._closefd and not self.closed: + import warnings + warnings.warn(f'unclosed file {source!r}', ResourceWarning, + stacklevel=2, source=self) + + def __getstate__(self): + raise TypeError(f"cannot pickle {self.__class__.__name__!r} object") + + def __repr__(self): + class_name = '%s.%s' % (self.__class__.__module__, + self.__class__.__qualname__) + if self.closed: + return '<%s [closed]>' % class_name + try: + name = self.name + except AttributeError: + return ('<%s fd=%d mode=%r closefd=%r>' % + (class_name, self._fd, self.mode, self._closefd)) + else: + return ('<%s name=%r mode=%r closefd=%r>' % + (class_name, name, self.mode, self._closefd)) + + @property + def _blksize(self): + if self._stat_atopen is None: + return DEFAULT_BUFFER_SIZE + + blksize = getattr(self._stat_atopen, "st_blksize", 0) + # WASI sets blsize to 0 + if not blksize: + return DEFAULT_BUFFER_SIZE + return blksize + + def _checkReadable(self): + if not self._readable: + raise UnsupportedOperation('File not open for reading') + + def _checkWritable(self, msg=None): + if not self._writable: + raise UnsupportedOperation('File not open for writing') + + def read(self, size=None): + """Read at most size bytes, returned as bytes. + + If size is less than 0, read all bytes in the file making + multiple read calls. See ``FileIO.readall``. + + Attempts to make only one system call, retrying only per + PEP 475 (EINTR). This means less data may be returned than + requested. + + In non-blocking mode, returns None if no data is available. + Return an empty bytes object at EOF. + """ + self._checkClosed() + self._checkReadable() + if size is None or size < 0: + return self.readall() + try: + return os.read(self._fd, size) + except BlockingIOError: + return None + + def readall(self): + """Read all data from the file, returned as bytes. + + Reads until either there is an error or read() returns size 0 + (indicates EOF). If the file is already at EOF, returns an + empty bytes object. + + In non-blocking mode, returns as much data as could be read + before EAGAIN. If no data is available (EAGAIN is returned + before bytes are read) returns None. + """ + self._checkClosed() + self._checkReadable() + if self._stat_atopen is None or self._stat_atopen.st_size <= 0: + bufsize = DEFAULT_BUFFER_SIZE + else: + # In order to detect end of file, need a read() of at least 1 + # byte which returns size 0. Oversize the buffer by 1 byte so the + # I/O can be completed with two read() calls (one for all data, one + # for EOF) without needing to resize the buffer. + bufsize = self._stat_atopen.st_size + 1 + + if self._stat_atopen.st_size > 65536: + try: + pos = os.lseek(self._fd, 0, SEEK_CUR) + if self._stat_atopen.st_size >= pos: + bufsize = self._stat_atopen.st_size - pos + 1 + except OSError: + pass + + result = bytearray(bufsize) + bytes_read = 0 + try: + while n := os.readinto(self._fd, memoryview(result)[bytes_read:]): + bytes_read += n + if bytes_read >= len(result): + result.resize(_new_buffersize(bytes_read)) + except BlockingIOError: + if not bytes_read: + return None + + assert len(result) - bytes_read >= 1, \ + "os.readinto buffer size 0 will result in erroneous EOF / returns 0" + result.resize(bytes_read) + return bytes(result) + + def readinto(self, buffer): + """Same as RawIOBase.readinto().""" + self._checkClosed() + self._checkReadable() + try: + return os.readinto(self._fd, buffer) + except BlockingIOError: + return None + + def write(self, b): + """Write bytes b to file, return number written. + + Only makes one system call, so not all of the data may be written. + The number of bytes actually written is returned. In non-blocking mode, + returns None if the write would block. + """ + self._checkClosed() + self._checkWritable() + try: + return os.write(self._fd, b) + except BlockingIOError: + return None + + def seek(self, pos, whence=SEEK_SET): + """Move to new file position. + + Argument offset is a byte count. Optional argument whence defaults to + SEEK_SET or 0 (offset from start of file, offset should be >= 0); other values + are SEEK_CUR or 1 (move relative to current position, positive or negative), + and SEEK_END or 2 (move relative to end of file, usually negative, although + many platforms allow seeking beyond the end of a file). + + Note that not all file objects are seekable. + """ + if isinstance(pos, float): + raise TypeError('an integer is required') + self._checkClosed() + return os.lseek(self._fd, pos, whence) + + def tell(self): + """tell() -> int. Current file position. + + Can raise OSError for non seekable files.""" + self._checkClosed() + return os.lseek(self._fd, 0, SEEK_CUR) + + def truncate(self, size=None): + """Truncate the file to at most size bytes. + + Size defaults to the current file position, as returned by tell(). + The current file position is changed to the value of size. + """ + self._checkClosed() + self._checkWritable() + if size is None: + size = self.tell() + os.ftruncate(self._fd, size) + self._stat_atopen = None + return size + + def close(self): + """Close the file. + + A closed file cannot be used for further I/O operations. close() may be + called more than once without error. + """ + if not self.closed: + self._stat_atopen = None + try: + if self._closefd and self._fd >= 0: + os.close(self._fd) + finally: + super().close() + + def seekable(self): + """True if file supports random-access.""" + self._checkClosed() + if self._seekable is None: + try: + self.tell() + except OSError: + self._seekable = False + else: + self._seekable = True + return self._seekable + + def readable(self): + """True if file was opened in a read mode.""" + self._checkClosed() + return self._readable + + def writable(self): + """True if file was opened in a write mode.""" + self._checkClosed() + return self._writable + + def fileno(self): + """Return the underlying file descriptor (an integer).""" + self._checkClosed() + return self._fd + + def isatty(self): + """True if the file is connected to a TTY device.""" + self._checkClosed() + return os.isatty(self._fd) + + def _isatty_open_only(self): + """Checks whether the file is a TTY using an open-only optimization. + + TTYs are always character devices. If the interpreter knows a file is + not a character device when it would call ``isatty``, can skip that + call. Inside ``open()`` there is a fresh stat result that contains that + information. Use the stat result to skip a system call. Outside of that + context TOCTOU issues (the fd could be arbitrarily modified by + surrounding code). + """ + if (self._stat_atopen is not None + and not stat.S_ISCHR(self._stat_atopen.st_mode)): + return False + return os.isatty(self._fd) + + @property + def closefd(self): + """True if the file descriptor will be closed by close().""" + return self._closefd + + @property + def mode(self): + """String giving the file mode""" + if self._created: + if self._readable: + return 'xb+' + else: + return 'xb' + elif self._appending: + if self._readable: + return 'ab+' + else: + return 'ab' + elif self._readable: + if self._writable: + return 'rb+' + else: + return 'rb' + else: + return 'wb' + + +class TextIOBase(IOBase): + + """Base class for text I/O. + + This class provides a character and line based interface to stream + I/O. + """ + + def read(self, size=-1): + """Read at most size characters from stream, where size is an int. + + Read from underlying buffer until we have size characters or we hit EOF. + If size is negative or omitted, read until EOF. + + Returns a string. + """ + self._unsupported("read") + + def write(self, s): + """Write string s to stream and returning an int.""" + self._unsupported("write") + + def truncate(self, pos=None): + """Truncate size to pos, where pos is an int.""" + self._unsupported("truncate") + + def readline(self): + """Read until newline or EOF. + + Returns an empty string if EOF is hit immediately. + """ + self._unsupported("readline") + + def detach(self): + """ + Separate the underlying buffer from the TextIOBase and return it. + + After the underlying buffer has been detached, the TextIO is in an + unusable state. + """ + self._unsupported("detach") + + @property + def encoding(self): + """Subclasses should override.""" + return None + + @property + def newlines(self): + """Line endings translated so far. + + Only line endings translated during reading are considered. + + Subclasses should override. + """ + return None + + @property + def errors(self): + """Error setting of the decoder or encoder. + + Subclasses should override.""" + return None + +io.TextIOBase.register(TextIOBase) + + +class IncrementalNewlineDecoder(codecs.IncrementalDecoder): + r"""Codec used when reading a file in universal newlines mode. It wraps + another incremental decoder, translating \r\n and \r into \n. It also + records the types of newlines encountered. When used with + translate=False, it ensures that the newline sequence is returned in + one piece. + """ + def __init__(self, decoder, translate, errors='strict'): + codecs.IncrementalDecoder.__init__(self, errors=errors) + self.translate = translate + self.decoder = decoder + self.seennl = 0 + self.pendingcr = False + + def decode(self, input, final=False): + # decode input (with the eventual \r from a previous pass) + if self.decoder is None: + output = input + else: + output = self.decoder.decode(input, final=final) + if self.pendingcr and (output or final): + output = "\r" + output + self.pendingcr = False + + # retain last \r even when not translating data: + # then readline() is sure to get \r\n in one pass + if output.endswith("\r") and not final: + output = output[:-1] + self.pendingcr = True + + # Record which newlines are read + crlf = output.count('\r\n') + cr = output.count('\r') - crlf + lf = output.count('\n') - crlf + self.seennl |= (lf and self._LF) | (cr and self._CR) \ + | (crlf and self._CRLF) + + if self.translate: + if crlf: + output = output.replace("\r\n", "\n") + if cr: + output = output.replace("\r", "\n") + + return output + + def getstate(self): + if self.decoder is None: + buf = b"" + flag = 0 + else: + buf, flag = self.decoder.getstate() + flag <<= 1 + if self.pendingcr: + flag |= 1 + return buf, flag + + def setstate(self, state): + buf, flag = state + self.pendingcr = bool(flag & 1) + if self.decoder is not None: + self.decoder.setstate((buf, flag >> 1)) + + def reset(self): + self.seennl = 0 + self.pendingcr = False + if self.decoder is not None: + self.decoder.reset() + + _LF = 1 + _CR = 2 + _CRLF = 4 + + @property + def newlines(self): + return (None, + "\n", + "\r", + ("\r", "\n"), + "\r\n", + ("\n", "\r\n"), + ("\r", "\r\n"), + ("\r", "\n", "\r\n") + )[self.seennl] + + +class TextIOWrapper(TextIOBase): + + r"""Character and line based layer over a BufferedIOBase object, buffer. + + encoding gives the name of the encoding that the stream will be + decoded or encoded with. It defaults to locale.getencoding(). + + errors determines the strictness of encoding and decoding (see the + codecs.register) and defaults to "strict". + + newline can be None, '', '\n', '\r', or '\r\n'. It controls the + handling of line endings. If it is None, universal newlines is + enabled. With this enabled, on input, the lines endings '\n', '\r', + or '\r\n' are translated to '\n' before being returned to the + caller. Conversely, on output, '\n' is translated to the system + default line separator, os.linesep. If newline is any other of its + legal values, that newline becomes the newline when the file is read + and it is returned untranslated. On output, '\n' is converted to the + newline. + + If line_buffering is True, a call to flush is implied when a call to + write contains a newline character. + """ + + _CHUNK_SIZE = 2048 + + # Initialize _buffer as soon as possible since it's used by __del__() + # which calls close() + _buffer = None + + # The write_through argument has no effect here since this + # implementation always writes through. The argument is present only + # so that the signature can match the signature of the C version. + def __init__(self, buffer, encoding=None, errors=None, newline=None, + line_buffering=False, write_through=False): + self._check_newline(newline) + encoding = text_encoding(encoding) + + if encoding == "locale": + encoding = self._get_locale_encoding() + + if not isinstance(encoding, str): + raise ValueError("invalid encoding: %r" % encoding) + + if not codecs.lookup(encoding)._is_text_encoding: + msg = "%r is not a text encoding" + raise LookupError(msg % encoding) + + if errors is None: + errors = "strict" + else: + if not isinstance(errors, str): + raise ValueError("invalid errors: %r" % errors) + if _CHECK_ERRORS: + codecs.lookup_error(errors) + + self._buffer = buffer + self._decoded_chars = '' # buffer for text returned from decoder + self._decoded_chars_used = 0 # offset into _decoded_chars for read() + self._snapshot = None # info for reconstructing decoder state + self._seekable = self._telling = self.buffer.seekable() + self._has_read1 = hasattr(self.buffer, 'read1') + self._configure(encoding, errors, newline, + line_buffering, write_through) + + def _check_newline(self, newline): + if newline is not None and not isinstance(newline, str): + raise TypeError("illegal newline type: %r" % (type(newline),)) + if newline not in (None, "", "\n", "\r", "\r\n"): + raise ValueError("illegal newline value: %r" % (newline,)) + + def _configure(self, encoding=None, errors=None, newline=None, + line_buffering=False, write_through=False): + self._encoding = encoding + self._errors = errors + self._encoder = None + self._decoder = None + self._b2cratio = 0.0 + + self._readuniversal = not newline + self._readtranslate = newline is None + self._readnl = newline + self._writetranslate = newline != '' + self._writenl = newline or os.linesep + + self._line_buffering = line_buffering + self._write_through = write_through + + # don't write a BOM in the middle of a file + if self._seekable and self.writable(): + position = self.buffer.tell() + if position != 0: + try: + self._get_encoder().setstate(0) + except LookupError: + # Sometimes the encoder doesn't exist + pass + + # self._snapshot is either None, or a tuple (dec_flags, next_input) + # where dec_flags is the second (integer) item of the decoder state + # and next_input is the chunk of input bytes that comes next after the + # snapshot point. We use this to reconstruct decoder states in tell(). + + # Naming convention: + # - "bytes_..." for integer variables that count input bytes + # - "chars_..." for integer variables that count decoded characters + + def __repr__(self): + result = "<{}.{}".format(self.__class__.__module__, + self.__class__.__qualname__) + try: + name = self.name + except AttributeError: + pass + else: + result += " name={0!r}".format(name) + try: + mode = self.mode + except AttributeError: + pass + else: + result += " mode={0!r}".format(mode) + return result + " encoding={0!r}>".format(self.encoding) + + @property + def encoding(self): + return self._encoding + + @property + def errors(self): + return self._errors + + @property + def line_buffering(self): + return self._line_buffering + + @property + def write_through(self): + return self._write_through + + @property + def buffer(self): + return self._buffer + + def reconfigure(self, *, + encoding=None, errors=None, newline=Ellipsis, + line_buffering=None, write_through=None): + """Reconfigure the text stream with new parameters. + + This also flushes the stream. + """ + if (self._decoder is not None + and (encoding is not None or errors is not None + or newline is not Ellipsis)): + raise UnsupportedOperation( + "It is not possible to set the encoding or newline of stream " + "after the first read") + + if errors is None: + if encoding is None: + errors = self._errors + else: + errors = 'strict' + elif not isinstance(errors, str): + raise TypeError("invalid errors: %r" % errors) + + if encoding is None: + encoding = self._encoding + else: + if not isinstance(encoding, str): + raise TypeError("invalid encoding: %r" % encoding) + if encoding == "locale": + encoding = self._get_locale_encoding() + + if newline is Ellipsis: + newline = self._readnl + self._check_newline(newline) + + if line_buffering is None: + line_buffering = self.line_buffering + if write_through is None: + write_through = self.write_through + + self.flush() + self._configure(encoding, errors, newline, + line_buffering, write_through) + + def seekable(self): + if self.closed: + raise ValueError("I/O operation on closed file.") + return self._seekable + + def readable(self): + return self.buffer.readable() + + def writable(self): + return self.buffer.writable() + + def flush(self): + self.buffer.flush() + self._telling = self._seekable + + def close(self): + if self.buffer is not None and not self.closed: + try: + self.flush() + finally: + self.buffer.close() + + @property + def closed(self): + return self.buffer.closed + + @property + def name(self): + return self.buffer.name + + def fileno(self): + return self.buffer.fileno() + + def isatty(self): + return self.buffer.isatty() + + def write(self, s): + 'Write data, where s is a str' + if self.closed: + raise ValueError("write to closed file") + if not isinstance(s, str): + raise TypeError("can't write %s to text stream" % + s.__class__.__name__) + length = len(s) + haslf = (self._writetranslate or self._line_buffering) and "\n" in s + if haslf and self._writetranslate and self._writenl != "\n": + s = s.replace("\n", self._writenl) + encoder = self._encoder or self._get_encoder() + # XXX What if we were just reading? + b = encoder.encode(s) + self.buffer.write(b) + if self._line_buffering and (haslf or "\r" in s): + self.flush() + if self._snapshot is not None: + self._set_decoded_chars('') + self._snapshot = None + if self._decoder: + self._decoder.reset() + return length + + def _get_encoder(self): + make_encoder = codecs.getincrementalencoder(self._encoding) + self._encoder = make_encoder(self._errors) + return self._encoder + + def _get_decoder(self): + make_decoder = codecs.getincrementaldecoder(self._encoding) + decoder = make_decoder(self._errors) + if self._readuniversal: + decoder = IncrementalNewlineDecoder(decoder, self._readtranslate) + self._decoder = decoder + return decoder + + # The following three methods implement an ADT for _decoded_chars. + # Text returned from the decoder is buffered here until the client + # requests it by calling our read() or readline() method. + def _set_decoded_chars(self, chars): + """Set the _decoded_chars buffer.""" + self._decoded_chars = chars + self._decoded_chars_used = 0 + + def _get_decoded_chars(self, n=None): + """Advance into the _decoded_chars buffer.""" + offset = self._decoded_chars_used + if n is None: + chars = self._decoded_chars[offset:] + else: + chars = self._decoded_chars[offset:offset + n] + self._decoded_chars_used += len(chars) + return chars + + def _get_locale_encoding(self): + try: + import locale + except ImportError: + # Importing locale may fail if Python is being built + return "utf-8" + else: + return locale.getencoding() + + def _rewind_decoded_chars(self, n): + """Rewind the _decoded_chars buffer.""" + if self._decoded_chars_used < n: + raise AssertionError("rewind decoded_chars out of bounds") + self._decoded_chars_used -= n + + def _read_chunk(self): + """ + Read and decode the next chunk of data from the BufferedReader. + """ + + # The return value is True unless EOF was reached. The decoded + # string is placed in self._decoded_chars (replacing its previous + # value). The entire input chunk is sent to the decoder, though + # some of it may remain buffered in the decoder, yet to be + # converted. + + if self._decoder is None: + raise ValueError("no decoder") + + if self._telling: + # To prepare for tell(), we need to snapshot a point in the + # file where the decoder's input buffer is empty. + + dec_buffer, dec_flags = self._decoder.getstate() + # Given this, we know there was a valid snapshot point + # len(dec_buffer) bytes ago with decoder state (b'', dec_flags). + + # Read a chunk, decode it, and put the result in self._decoded_chars. + if self._has_read1: + input_chunk = self.buffer.read1(self._CHUNK_SIZE) + else: + input_chunk = self.buffer.read(self._CHUNK_SIZE) + eof = not input_chunk + decoded_chars = self._decoder.decode(input_chunk, eof) + self._set_decoded_chars(decoded_chars) + if decoded_chars: + self._b2cratio = len(input_chunk) / len(self._decoded_chars) + else: + self._b2cratio = 0.0 + + if self._telling: + # At the snapshot point, len(dec_buffer) bytes before the read, + # the next input to be decoded is dec_buffer + input_chunk. + self._snapshot = (dec_flags, dec_buffer + input_chunk) + + return not eof + + def _pack_cookie(self, position, dec_flags=0, + bytes_to_feed=0, need_eof=False, chars_to_skip=0): + # The meaning of a tell() cookie is: seek to position, set the + # decoder flags to dec_flags, read bytes_to_feed bytes, feed them + # into the decoder with need_eof as the EOF flag, then skip + # chars_to_skip characters of the decoded result. For most simple + # decoders, tell() will often just give a byte offset in the file. + return (position | (dec_flags<<64) | (bytes_to_feed<<128) | + (chars_to_skip<<192) | bool(need_eof)<<256) + + def _unpack_cookie(self, bigint): + rest, position = divmod(bigint, 1<<64) + rest, dec_flags = divmod(rest, 1<<64) + rest, bytes_to_feed = divmod(rest, 1<<64) + need_eof, chars_to_skip = divmod(rest, 1<<64) + return position, dec_flags, bytes_to_feed, bool(need_eof), chars_to_skip + + def tell(self): + if not self._seekable: + raise UnsupportedOperation("underlying stream is not seekable") + if not self._telling: + raise OSError("telling position disabled by next() call") + self.flush() + position = self.buffer.tell() + decoder = self._decoder + if decoder is None or self._snapshot is None: + if self._decoded_chars: + # This should never happen. + raise AssertionError("pending decoded text") + return position + + # Skip backward to the snapshot point (see _read_chunk). + dec_flags, next_input = self._snapshot + position -= len(next_input) + + # How many decoded characters have been used up since the snapshot? + chars_to_skip = self._decoded_chars_used + if chars_to_skip == 0: + # We haven't moved from the snapshot point. + return self._pack_cookie(position, dec_flags) + + # Starting from the snapshot position, we will walk the decoder + # forward until it gives us enough decoded characters. + saved_state = decoder.getstate() + try: + # Fast search for an acceptable start point, close to our + # current pos. + # Rationale: calling decoder.decode() has a large overhead + # regardless of chunk size; we want the number of such calls to + # be O(1) in most situations (common decoders, sensible input). + # Actually, it will be exactly 1 for fixed-size codecs (all + # 8-bit codecs, also UTF-16 and UTF-32). + skip_bytes = int(self._b2cratio * chars_to_skip) + skip_back = 1 + assert skip_bytes <= len(next_input) + while skip_bytes > 0: + decoder.setstate((b'', dec_flags)) + # Decode up to temptative start point + n = len(decoder.decode(next_input[:skip_bytes])) + if n <= chars_to_skip: + b, d = decoder.getstate() + if not b: + # Before pos and no bytes buffered in decoder => OK + dec_flags = d + chars_to_skip -= n + break + # Skip back by buffered amount and reset heuristic + skip_bytes -= len(b) + skip_back = 1 + else: + # We're too far ahead, skip back a bit + skip_bytes -= skip_back + skip_back = skip_back * 2 + else: + skip_bytes = 0 + decoder.setstate((b'', dec_flags)) + + # Note our initial start point. + start_pos = position + skip_bytes + start_flags = dec_flags + if chars_to_skip == 0: + # We haven't moved from the start point. + return self._pack_cookie(start_pos, start_flags) + + # Feed the decoder one byte at a time. As we go, note the + # nearest "safe start point" before the current location + # (a point where the decoder has nothing buffered, so seek() + # can safely start from there and advance to this location). + bytes_fed = 0 + need_eof = False + # Chars decoded since `start_pos` + chars_decoded = 0 + for i in range(skip_bytes, len(next_input)): + bytes_fed += 1 + chars_decoded += len(decoder.decode(next_input[i:i+1])) + dec_buffer, dec_flags = decoder.getstate() + if not dec_buffer and chars_decoded <= chars_to_skip: + # Decoder buffer is empty, so this is a safe start point. + start_pos += bytes_fed + chars_to_skip -= chars_decoded + start_flags, bytes_fed, chars_decoded = dec_flags, 0, 0 + if chars_decoded >= chars_to_skip: + break + else: + # We didn't get enough decoded data; signal EOF to get more. + chars_decoded += len(decoder.decode(b'', final=True)) + need_eof = True + if chars_decoded < chars_to_skip: + raise OSError("can't reconstruct logical file position") + + # The returned cookie corresponds to the last safe start point. + return self._pack_cookie( + start_pos, start_flags, bytes_fed, need_eof, chars_to_skip) + finally: + decoder.setstate(saved_state) + + def truncate(self, pos=None): + self.flush() + if pos is None: + pos = self.tell() + return self.buffer.truncate(pos) + + def detach(self): + if self.buffer is None: + raise ValueError("buffer is already detached") + self.flush() + buffer = self._buffer + self._buffer = None + return buffer + + def seek(self, cookie, whence=0): + def _reset_encoder(position): + """Reset the encoder (merely useful for proper BOM handling)""" + try: + encoder = self._encoder or self._get_encoder() + except LookupError: + # Sometimes the encoder doesn't exist + pass + else: + if position != 0: + encoder.setstate(0) + else: + encoder.reset() + + if self.closed: + raise ValueError("tell on closed file") + if not self._seekable: + raise UnsupportedOperation("underlying stream is not seekable") + if whence == SEEK_CUR: + if cookie != 0: + raise UnsupportedOperation("can't do nonzero cur-relative seeks") + # Seeking to the current position should attempt to + # sync the underlying buffer with the current position. + whence = 0 + cookie = self.tell() + elif whence == SEEK_END: + if cookie != 0: + raise UnsupportedOperation("can't do nonzero end-relative seeks") + self.flush() + position = self.buffer.seek(0, whence) + self._set_decoded_chars('') + self._snapshot = None + if self._decoder: + self._decoder.reset() + _reset_encoder(position) + return position + if whence != 0: + raise ValueError("unsupported whence (%r)" % (whence,)) + if cookie < 0: + raise ValueError("negative seek position %r" % (cookie,)) + self.flush() + + # The strategy of seek() is to go back to the safe start point + # and replay the effect of read(chars_to_skip) from there. + start_pos, dec_flags, bytes_to_feed, need_eof, chars_to_skip = \ + self._unpack_cookie(cookie) + + # Seek back to the safe start point. + self.buffer.seek(start_pos) + self._set_decoded_chars('') + self._snapshot = None + + # Restore the decoder to its state from the safe start point. + if cookie == 0 and self._decoder: + self._decoder.reset() + elif self._decoder or dec_flags or chars_to_skip: + self._decoder = self._decoder or self._get_decoder() + self._decoder.setstate((b'', dec_flags)) + self._snapshot = (dec_flags, b'') + + if chars_to_skip: + # Just like _read_chunk, feed the decoder and save a snapshot. + input_chunk = self.buffer.read(bytes_to_feed) + self._set_decoded_chars( + self._decoder.decode(input_chunk, need_eof)) + self._snapshot = (dec_flags, input_chunk) + + # Skip chars_to_skip of the decoded characters. + if len(self._decoded_chars) < chars_to_skip: + raise OSError("can't restore logical file position") + self._decoded_chars_used = chars_to_skip + + _reset_encoder(cookie) + return cookie + + def read(self, size=None): + self._checkReadable() + if size is None: + size = -1 + else: + try: + size_index = size.__index__ + except AttributeError: + raise TypeError(f"{size!r} is not an integer") + else: + size = size_index() + decoder = self._decoder or self._get_decoder() + if size < 0: + chunk = self.buffer.read() + if chunk is None: + raise BlockingIOError("Read returned None.") + # Read everything. + result = (self._get_decoded_chars() + + decoder.decode(chunk, final=True)) + if self._snapshot is not None: + self._set_decoded_chars('') + self._snapshot = None + return result + else: + # Keep reading chunks until we have size characters to return. + eof = False + result = self._get_decoded_chars(size) + while len(result) < size and not eof: + eof = not self._read_chunk() + result += self._get_decoded_chars(size - len(result)) + return result + + def __next__(self): + self._telling = False + line = self.readline() + if not line: + self._snapshot = None + self._telling = self._seekable + raise StopIteration + return line + + def readline(self, size=None): + if self.closed: + raise ValueError("read from closed file") + if size is None: + size = -1 + else: + try: + size_index = size.__index__ + except AttributeError: + raise TypeError(f"{size!r} is not an integer") + else: + size = size_index() + + # Grab all the decoded text (we will rewind any extra bits later). + line = self._get_decoded_chars() + + start = 0 + # Make the decoder if it doesn't already exist. + if not self._decoder: + self._get_decoder() + + pos = endpos = None + while True: + if self._readtranslate: + # Newlines are already translated, only search for \n + pos = line.find('\n', start) + if pos >= 0: + endpos = pos + 1 + break + else: + start = len(line) + + elif self._readuniversal: + # Universal newline search. Find any of \r, \r\n, \n + # The decoder ensures that \r\n are not split in two pieces + + # In C we'd look for these in parallel of course. + nlpos = line.find("\n", start) + crpos = line.find("\r", start) + if crpos == -1: + if nlpos == -1: + # Nothing found + start = len(line) + else: + # Found \n + endpos = nlpos + 1 + break + elif nlpos == -1: + # Found lone \r + endpos = crpos + 1 + break + elif nlpos < crpos: + # Found \n + endpos = nlpos + 1 + break + elif nlpos == crpos + 1: + # Found \r\n + endpos = crpos + 2 + break + else: + # Found \r + endpos = crpos + 1 + break + else: + # non-universal + pos = line.find(self._readnl) + if pos >= 0: + endpos = pos + len(self._readnl) + break + + if size >= 0 and len(line) >= size: + endpos = size # reached length size + break + + # No line ending seen yet - get more data' + while self._read_chunk(): + if self._decoded_chars: + break + if self._decoded_chars: + line += self._get_decoded_chars() + else: + # end of file + self._set_decoded_chars('') + self._snapshot = None + return line + + if size >= 0 and endpos > size: + endpos = size # don't exceed size + + # Rewind _decoded_chars to just after the line ending we found. + self._rewind_decoded_chars(len(line) - endpos) + return line[:endpos] + + @property + def newlines(self): + return self._decoder.newlines if self._decoder else None + + def _dealloc_warn(self, source): + if dealloc_warn := getattr(self.buffer, "_dealloc_warn", None): + dealloc_warn(source) + + +class StringIO(TextIOWrapper): + """Text I/O implementation using an in-memory buffer. + + The initial_value argument sets the value of object. The newline + argument is like the one of TextIOWrapper's constructor. + """ + + def __init__(self, initial_value="", newline="\n"): + super(StringIO, self).__init__(BytesIO(), + encoding="utf-8", + errors="surrogatepass", + newline=newline) + # Issue #5645: make universal newlines semantics the same as in the + # C version, even under Windows. + if newline is None: + self._writetranslate = False + if initial_value is not None: + if not isinstance(initial_value, str): + raise TypeError("initial_value must be str or None, not {0}" + .format(type(initial_value).__name__)) + self.write(initial_value) + self.seek(0) + + def getvalue(self): + self.flush() + decoder = self._decoder or self._get_decoder() + old_state = decoder.getstate() + decoder.reset() + try: + return decoder.decode(self.buffer.getvalue(), final=True) + finally: + decoder.setstate(old_state) + + def __repr__(self): + # TextIOWrapper tells the encoding in its repr. In StringIO, + # that's an implementation detail. + return object.__repr__(self) + + @property + def errors(self): + return None + + @property + def encoding(self): + return None + + def detach(self): + # This doesn't make sense on StringIO. + self._unsupported("detach") From 2734c7aa6f6f368e65f41c118b4eae4c942a9bab Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 23:25:40 +0700 Subject: [PATCH 65/84] import: thread the raw fromlist object into _handle_fromlist The builtin __import__ was flattening fromlist into a []string and rejecting any non-str entry up front with its own message. CPython never type-checks fromlist there: builtin___import___impl hands the object straight to _handle_fromlist, which iterates it and raises the "Item in ``from list'' must be str" TypeError itself, and happily walks an arbitrary iterable. Pass the object through unchanged so the error text and the iterable handling match. This is what test_fromlist's test_invalid_type checks (both the bytes-in-a-list and the iter([bytes]) cases). Also routes the builtin's dotted-head / fromlist selection through the PyImport_ImportModuleLevelObject port instead of stringifying. --- builtins/import.go | 71 +++++-------- builtins/import_test.go | 49 +++++++-- vm/builtins_hook.go | 51 +++++----- vm/import_level.go | 219 ++++++++++++++++++++++++++++++++++++++++ 4 files changed, 310 insertions(+), 80 deletions(-) create mode 100644 vm/import_level.go diff --git a/builtins/import.go b/builtins/import.go index 5b6d08e8..332a680c 100644 --- a/builtins/import.go +++ b/builtins/import.go @@ -20,15 +20,22 @@ import ( ) // Importer resolves a module by name, with pkgname as the anchor for -// relative imports and level as the dot-count. fromlist is empty for -// `import a.b.c` and non-empty for `from a.b import c, d`. The hook -// returns the resolved module along with the same chain CPython hands -// back: when fromlist is empty the caller wants the top-level package, -// when fromlist is non-empty the caller wants the deepest module so +// relative imports and level as the dot-count. fromlist is the raw +// object the caller passed (None for `import a.b.c`, a sequence for +// `from a.b import c, d`); it is handed to _handle_fromlist unchanged, +// so a non-str entry surfaces as the TypeError _handle_fromlist raises +// rather than an early gopy-only rejection, and an arbitrary iterable +// is iterated the same way CPython iterates it. globals is the dict the +// caller handed to __import__ (or nil); the live importlib re-derives +// the package anchor from it via _calc___package__, so it must be the +// caller's explicit globals, not the running frame's. The hook returns +// the resolved module along with the same chain CPython hands back: +// when fromlist is empty the caller wants the top-level package, when +// fromlist is non-empty the caller wants the deepest module so // IMPORT_FROM can grab attributes off it. // // CPython: Python/import.c:1561 PyImport_ImportModuleLevelObject -type Importer func(name, pkgname string, level int, fromlist []string) (objects.Object, error) +type Importer func(name, pkgname string, level int, fromlist objects.Object, globals objects.Object) (objects.Object, error) var currentImporter Importer @@ -73,13 +80,13 @@ func Import(args []objects.Object, kwargs map[string]objects.Object) (objects.Ob } } pkgname := pkgnameFromGlobals(parsed.globals) - return currentImporter(parsed.name, pkgname, parsed.level, parsed.fromlist) + return currentImporter(parsed.name, pkgname, parsed.level, parsed.fromlist, parsed.globals) } type importArgs struct { name string globals objects.Object - fromlist []string + fromlist objects.Object level int } @@ -130,9 +137,15 @@ func parseImportArgs(args []objects.Object, kwargs map[string]objects.Object) (i return importArgs{}, fmt.Errorf("ValueError: level must be >= 0") } } - fromlist, err := fromlistArg(bound[3]) - if err != nil { - return importArgs{}, err + // fromlist reaches the import machinery untouched. CPython's + // builtin___import___impl performs no type or element check; an empty + // tuple stands in for a missing argument, and _handle_fromlist raises + // the TypeError for any non-str entry or iterates a custom iterable. + // + // CPython: Python/bltinmodule.c:259 builtin___import___impl + fromlist := bound[3] + if fromlist == nil { + fromlist = objects.NewTuple(nil) } return importArgs{ name: name, @@ -142,42 +155,6 @@ func parseImportArgs(args []objects.Object, kwargs map[string]objects.Object) (i }, nil } -// fromlistArg unpacks the fromlist argument into a flat []string. -// None and missing both mean "empty"; a tuple or list is iterated; any -// other type is a TypeError. The element check matches CPython's -// import.c which rejects non-str entries before lookup. -// -// CPython: Python/import.c:1726 import_from -func fromlistArg(o objects.Object) ([]string, error) { - if o == nil || objects.IsNone(o) { - return nil, nil - } - var raw []objects.Object - switch v := o.(type) { - case *objects.Tuple: - raw = make([]objects.Object, v.Len()) - for i := range raw { - raw[i] = v.Item(i) - } - case *objects.List: - raw = make([]objects.Object, v.Len()) - for i := range raw { - raw[i] = v.Item(i) - } - default: - return nil, fmt.Errorf("TypeError: fromlist must be a tuple or list") - } - out := make([]string, 0, len(raw)) - for _, item := range raw { - s, err := stringArg(item, "fromlist item") - if err != nil { - return nil, err - } - out = append(out, s) - } - return out, nil -} - // stringArg coerces o to a Go string, raising TypeError when o isn't a // Python str. The label is the argument name used in the error. func stringArg(o objects.Object, label string) (string, error) { diff --git a/builtins/import_test.go b/builtins/import_test.go index f01b80b4..2bc5a292 100644 --- a/builtins/import_test.go +++ b/builtins/import_test.go @@ -15,17 +15,40 @@ type importCall struct { fromlist []string } +// fromlistStrings flattens the raw fromlist object the hook now +// receives into the []string the assertions below compare against. It +// mirrors how _handle_fromlist iterates the object, stopping at the +// first non-str entry (none of these tests pass one). +func fromlistStrings(o objects.Object) []string { + var out []string + switch v := o.(type) { + case *objects.Tuple: + for i := 0; i < v.Len(); i++ { + if u, ok := v.Item(i).(*objects.Unicode); ok { + out = append(out, u.Value()) + } + } + case *objects.List: + for i := 0; i < v.Len(); i++ { + if u, ok := v.Item(i).(*objects.Unicode); ok { + out = append(out, u.Value()) + } + } + } + return out +} + func captureImporter(t *testing.T, mod objects.Object, returnErr error) *importCall { t.Helper() prev := currentImporter t.Cleanup(func() { SetImporter(prev) }) got := &importCall{} - SetImporter(func(name, pkgname string, level int, fromlist []string) (objects.Object, error) { + SetImporter(func(name, pkgname string, level int, fromlist objects.Object, _ objects.Object) (objects.Object, error) { got.name = name got.pkgname = pkgname got.level = level - got.fromlist = fromlist + got.fromlist = fromlistStrings(fromlist) return mod, returnErr }) return got @@ -198,16 +221,26 @@ func TestImportNegativeLevel(t *testing.T) { } } -func TestImportFromlistRejectsString(t *testing.T) { - captureImporter(t, nil, nil) - _, err := Import([]objects.Object{ +func TestImportFromlistPassesThroughRawObject(t *testing.T) { + // CPython's builtin___import__ never type-checks fromlist; it hands the + // object straight to _handle_fromlist, which iterates it. A str is a + // valid (if unusual) fromlist, so __import__ must not reject it early. + mod := objects.NewModule("a") + got := captureImporter(t, mod, nil) + out, err := Import([]objects.Object{ objects.NewStr("a"), objects.None(), objects.None(), - objects.NewStr("notalist"), + objects.NewStr("xy"), }, nil) - if err == nil || !strings.Contains(err.Error(), "fromlist must be a tuple or list") { - t.Fatalf("__import__: err=%v, want fromlist TypeError", err) + if err != nil { + t.Fatalf("__import__: %v", err) + } + if out != mod { + t.Fatalf("__import__ returned %v, want %v", out, mod) + } + if got.name != "a" { + t.Fatalf("hook name = %q, want a", got.name) } } diff --git a/vm/builtins_hook.go b/vm/builtins_hook.go index 5c9ea101..aab4d13f 100644 --- a/vm/builtins_hook.go +++ b/vm/builtins_hook.go @@ -610,12 +610,13 @@ func currentEvaluator(code *objects.Code, globals, locals, closure objects.Objec // currentImporter is the hook builtins.__import__ delegates to. It // reuses vmExecutor so the import can run frozen / built-in module -// init code, then forwards to imp.ImportModuleLevel. fromlist is -// accepted for signature parity; the existing IMPORT_NAME arm -// likewise drops it pending fromlist-driven submodule discovery. +// init code. fromlist is the raw object the caller passed, threaded +// untouched into _handle_fromlist so a non-str entry raises the same +// TypeError CPython raises and a custom iterable is iterated the same +// way. // // CPython: Python/import.c:1561 PyImport_ImportModuleLevelObject -func currentImporter(name, pkgname string, level int, fromlist []string) (objects.Object, error) { +func currentImporter(name, pkgname string, level int, fromlist objects.Object, globals objects.Object) (objects.Object, error) { ts := currentThread() if ts == nil { ts = state.NewThread() @@ -631,25 +632,29 @@ func currentImporter(name, pkgname string, level int, fromlist []string) (object } // Prefer the live Python importlib, matching CPython where the builtin - // __import__ IS _frozen_importlib.__import__. It performs fromlist / - // dotted-head handling and registers in the shared sys.modules, so the - // manual logic below only runs during early bootstrap before + // __import__ IS PyImport_ImportModuleLevelObject. That C body resolves + // the name, drives _gcd_import / _find_and_load, and performs the + // fromlist / dotted-head selection itself. importModuleLevelObject ports + // it; the manual Go driver below only runs during early bootstrap before // _bootstrap._install has wired the frozen importer. // // CPython: Python/bltinmodule.c:259 builtin___import___impl - var callerGlobals objects.Object - if topFrame != nil { - callerGlobals = topFrame.Globals - } - flItems := make([]objects.Object, len(fromlist)) - for i, s := range fromlist { - flItems[i] = objects.NewStr(s) - } - fl := objects.None() - if len(flItems) > 0 { - fl = objects.NewTuple(flItems) + // CPython: Python/import.c:3798 PyImport_ImportModuleLevelObject + // + // The globals handed in must be the dict the caller passed to + // __import__, because resolve_name / _calc___package__ derives the + // relative-import anchor from it. A frame-globals fallback would anchor + // a bare __import__('', {'__package__': 'pkg'}, level=2) against the + // caller's own package; a missing globals must reach _calc___package__ + // as None so it raises the same KeyError("'__name__' not in globals"). + // + // CPython: Python/import.c:3576 resolve_name + // CPython: Lib/importlib/_bootstrap.py:1349 _calc___package__ + callerGlobals := globals + if callerGlobals == nil { + callerGlobals = objects.None() } - if mod, ok, derr := delegateImport(name, callerGlobals, objects.None(), fl, level); ok { + if mod, ok, derr := importModuleLevelObject(name, callerGlobals, fromlist, level); ok { return mod, derr } @@ -676,12 +681,8 @@ func currentImporter(name, pkgname string, level int, fromlist []string) (object // CPython: Python/bltinmodule.c:259 builtin___import___impl // CPython: Lib/importlib/_bootstrap.py:1463 _handle_fromlist e := &evalState{ts: ts, f: topFrame} - if len(fromlist) > 0 { - items := make([]objects.Object, len(fromlist)) - for i, s := range fromlist { - items[i] = objects.NewStr(s) - } - if herr := e.handleFromlist(mod, objects.NewList(items), false); herr != nil { + if !isEmptyFromlist(fromlist) { + if herr := e.handleFromlist(mod, fromlist, false); herr != nil { return nil, herr } return mod, nil diff --git a/vm/import_level.go b/vm/import_level.go new file mode 100644 index 00000000..9566da4b --- /dev/null +++ b/vm/import_level.go @@ -0,0 +1,219 @@ +package vm + +import ( + "fmt" + "strings" + + pyerrors "github.com/tamnd/gopy/errors" + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/objects" +) + +// importModuleLevelObject ports PyImport_ImportModuleLevelObject, the C +// body behind the builtin __import__. CPython describes it as +// "importlib.__import__() & _gcd_import(), ported to C for added +// performance": it resolves the absolute name, drives the live importlib +// _gcd_import / _find_and_load to load it, then performs the fromlist / +// dotted-head selection in C rather than in _bootstrap.__import__. +// +// Routing the builtin through this port (instead of calling +// _frozen_importlib.__import__ wholesale) matters for the dotted-head +// selection: the C code slices the standalone abs_name and re-reads +// sys.modules, raising KeyError("%R not in sys.modules as expected") when +// the entry is missing. The Python mirror instead reads module.__name__, +// which raises AttributeError when a caller has stuffed a non-module +// object into sys.modules (the test_malicious_relative_import regression +// guard, gh-134100). +// +// The returned ok is false when _frozen_importlib is not installed yet +// (early bootstrap), so currentImporter falls back to the Go driver. +// +// CPython: Python/import.c:3798 PyImport_ImportModuleLevelObject +func importModuleLevelObject(name string, globals objects.Object, fromlist objects.Object, level int) (objects.Object, bool, error) { + frozen, ok := imp.GetModule("_frozen_importlib") + if !ok { + return nil, false, nil + } + + // CPython: Python/import.c:3829 resolve_name / abs_name selection. + // _gcd_import runs _sanity_check + _resolve_name itself, so we hand it + // the original (name, package, level); we recompute abs_name here only + // to slice the dotted head below, mirroring the C standalone abs_name. + var packageStr string + var module objects.Object + if level > 0 { + // _bootstrap.__import__: globals_ = globals if globals is not None + // else {}. _calc___package__ runs the __package__/__spec__/__name__ + // fallback (and its DeprecationWarning / ImportWarning / KeyError / + // TypeError) against that dict. + // + // CPython: Lib/importlib/_bootstrap.py:1487 __import__ + g := globals + if g == nil || objects.IsNone(g) { + g = objects.NewDict() + } + calc, err := objects.GetAttr(frozen, objects.NewStr("_calc___package__")) + if err != nil { + return nil, true, err + } + pkgObj, err := objects.Call(calc, objects.NewTuple([]objects.Object{g}), nil) + if err != nil { + return nil, true, err + } + if u, isStr := pkgObj.(*objects.Unicode); isStr { + packageStr = u.Value() + } + gcd, err := objects.GetAttr(frozen, objects.NewStr("_gcd_import")) + if err != nil { + return nil, true, err + } + module, err = objects.Call(gcd, objects.NewTuple([]objects.Object{ + objects.NewStr(name), pkgObj, objects.NewInt(int64(level)), + }), nil) + if err != nil { + return nil, true, err + } + } else { + // CPython: Python/import.c:3835 level == 0 requires a non-empty name. + if name == "" { + return nil, true, fmt.Errorf("ValueError: Empty module name") + } + gcd, err := objects.GetAttr(frozen, objects.NewStr("_gcd_import")) + if err != nil { + return nil, true, err + } + module, err = objects.Call(gcd, objects.NewTuple([]objects.Object{objects.NewStr(name)}), nil) + if err != nil { + return nil, true, err + } + } + + // CPython: Python/import.c:3881 has_from = PyObject_IsTrue(fromlist). + hasFrom := false + if fromlist != nil && !objects.IsNone(fromlist) { + t, err := objects.IsTruthy(fromlist) + if err != nil { + return nil, true, err + } + hasFrom = t + } + if !hasFrom { + return headSelection(name, packageStr, level, module) + } + return fromlistSelection(frozen, module, fromlist) +} + +// headSelection mirrors the !has_from branch of +// PyImport_ImportModuleLevelObject: an absolute dotted import returns the +// top-level package, while a relative dotted import re-reads the +// already-loaded head from sys.modules by slicing the resolved abs_name. +// +// CPython: Python/import.c:3887 (!has_from branch) +func headSelection(name, packageStr string, level int, module objects.Object) (objects.Object, bool, error) { + if level != 0 && len(name) == 0 { + // CPython: Python/import.c:3895 (elif !name: final_mod = mod). + return module, true, nil + } + runes := []rune(name) + dot := indexRune(runes, '.') + if dot < 0 { + // CPython: Python/import.c:3897 (no dot, simple exit). + return module, true, nil + } + if level == 0 { + // CPython: Python/import.c:3903 re-import the front absolutely. + front := string(runes[:dot]) + return importModuleLevelObject(front, objects.None(), nil, 0) + } + // CPython: Python/import.c:3912 slice abs_name to its first `dot` + // components and re-read sys.modules. abs_name is the standalone + // resolved name, not module.__name__, so a non-module sys.modules entry + // surfaces as the KeyError below rather than an AttributeError. + absName := resolveImportName(name, packageStr, level) + absRunes := []rune(absName) + cutOff := len(runes) - dot + toReturn := string(absRunes[:len(absRunes)-cutOff]) + mod, err := imp.SysModules().GetItem(objects.NewStr(toReturn)) + if err != nil || mod == nil { + // CPython: Python/import.c:3924 KeyError "%R not in sys.modules + // as expected". + r, rerr := objects.Repr(objects.NewStr(toReturn)) + if rerr != nil { + r = "'" + toReturn + "'" + } + msg := fmt.Sprintf("%s not in sys.modules as expected", r) + exc := pyerrors.New(pyerrors.PyExc_KeyError, objects.NewTuple([]objects.Object{objects.NewStr(msg)})) + return nil, true, objects.NewRaisedError(exc, "KeyError: "+msg) + } + return mod, true, nil +} + +// fromlistSelection mirrors the has_from branch: when the loaded module is +// a package (carries __path__) defer to importlib._handle_fromlist to +// force-import each requested submodule, otherwise return the module +// untouched. +// +// CPython: Python/import.c:3939 (has_from branch) +func fromlistSelection(frozen objects.Object, module objects.Object, fromlist objects.Object) (objects.Object, bool, error) { + hasPath, err := objects.HasAttrString(module, "__path__") + if err != nil { + return nil, true, err + } + if !hasPath { + return module, true, nil + } + // _bootstrap.__import__ passes _gcd_import as the import callable so + // _handle_fromlist loads `pkg.sub` by absolute name. fromlist reaches + // _handle_fromlist untouched: it iterates the object and raises the + // "Item in ``from list'' must be str" TypeError for a non-str entry, + // matching the C body which never pre-validates the elements. + // + // CPython: Lib/importlib/_bootstrap.py:1505 _handle_fromlist(module, + // fromlist, _gcd_import) + gcd, err := objects.GetAttr(frozen, objects.NewStr("_gcd_import")) + if err != nil { + return nil, true, err + } + handle, err := objects.GetAttr(frozen, objects.NewStr("_handle_fromlist")) + if err != nil { + return nil, true, err + } + res, err := objects.Call(handle, objects.NewTuple([]objects.Object{ + module, fromlist, gcd, + }), nil) + if err != nil { + return nil, true, err + } + return res, true, nil +} + +// resolveImportName mirrors _bootstrap._resolve_name: strip the trailing +// (level-1) dotted components from package, then re-attach name. It +// recomputes the abs_name that _gcd_import derived internally so +// headSelection can slice it. +// +// CPython: Lib/importlib/_bootstrap.py _resolve_name +func resolveImportName(name, pkg string, level int) string { + for i := 1; i < level; i++ { + dot := strings.LastIndexByte(pkg, '.') + if dot < 0 { + break + } + pkg = pkg[:dot] + } + if name == "" { + return pkg + } + return pkg + "." + name +} + +// indexRune returns the index of the first occurrence of r in runes, or +// -1. Matches PyUnicode_FindChar(..., direction=1) on code points. +func indexRune(runes []rune, r rune) int { + for i, c := range runes { + if c == r { + return i + } + } + return -1 +} From c89dae0f99aa322cb341bfc494607f5d142c939b Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Mon, 15 Jun 2026 23:37:57 +0700 Subject: [PATCH 66/84] io: honor errors= in TextIOWrapper decoders and reject directories at open TextIOWrapper's incremental decoders hard-coded strict error handling and ignored the errors argument, so open(path, errors='ignore').read() raised UnicodeDecodeError instead of applying the handler. Thread errors through every decoder and delegate the byte decode to the codecs package, which applies the named handler the same way bytes.decode does. Also reject opening a directory: open() succeeds on a directory on Unix, but a file object must never wrap one. fstat the descriptor and raise IsADirectoryError at construction time the way CPython does, rather than deferring the failure to the first read. --- module/io/fileio.go | 15 ++++ module/io/module.go | 14 ++++ module/io/textio_codec.go | 163 +++++++++++++++++++------------------- 3 files changed, 109 insertions(+), 83 deletions(-) diff --git a/module/io/fileio.go b/module/io/fileio.go index bf736b0e..e33e969c 100644 --- a/module/io/fileio.go +++ b/module/io/fileio.go @@ -15,6 +15,7 @@ import ( "io" stdos "os" "runtime" + "syscall" "github.com/tamnd/gopy/objects" ) @@ -330,6 +331,20 @@ func fileIOCall(_ objects.Object, args []objects.Object, kwargs map[string]objec return nil, fmt.Errorf("OSError: %w", err) } } + // open() succeeds on a directory on Unix, but a FileIO must never wrap + // one: fstat the descriptor and raise IsADirectoryError (EISDIR) when it + // names a directory, the way CPython rejects it at construction time + // rather than deferring the failure to the first read. + // + // CPython: Modules/_io/fileio.c:478 _io_FileIO___init___impl (S_ISDIR check) + if info, statErr := f.Stat(); statErr == nil && info.IsDir() { + _ = f.Close() + return nil, fmt.Errorf("OSError: %w", &stdos.PathError{ + Op: "open", + Path: name, + Err: syscall.EISDIR, + }) + } fi := &FileIO{ f: f, name: name, diff --git a/module/io/module.go b/module/io/module.go index 37b1115d..7b5e7fae 100644 --- a/module/io/module.go +++ b/module/io/module.go @@ -15,6 +15,7 @@ import ( "fmt" "os" "strings" + "syscall" "github.com/tamnd/gopy/errors" "github.com/tamnd/gopy/imp" @@ -455,6 +456,19 @@ func ioOpen(a *ioOpenArgs) (objects.Object, error) { // CPython: Modules/_io/fileio.c:451 _io_FileIO___init___impl return nil, fmt.Errorf("OSError: %w", err) } + // open() succeeds on a directory on Unix; reject it at construction + // with IsADirectoryError (EISDIR) so the failure surfaces here rather + // than on the first read. + // + // CPython: Modules/_io/fileio.c:478 _io_FileIO___init___impl (S_ISDIR check) + if info, statErr := f.Stat(); statErr == nil && info.IsDir() { + _ = f.Close() + return nil, fmt.Errorf("OSError: %w", &os.PathError{ + Op: "open", + Path: a.file, + Err: syscall.EISDIR, + }) + } raw = NewFileIO(f, a.file, rawMode, readable, writable) } diff --git a/module/io/textio_codec.go b/module/io/textio_codec.go index f4f70e9c..1e19e386 100644 --- a/module/io/textio_codec.go +++ b/module/io/textio_codec.go @@ -14,8 +14,6 @@ package io import ( "encoding/binary" "fmt" - "unicode/utf16" - "unicode/utf8" "github.com/tamnd/gopy/codecs" ) @@ -48,47 +46,51 @@ type IncrementalEncoder interface { Reset() } -// getIncrementalDecoder returns a fresh decoder for encoding. errors -// is the error-handling strategy ("strict", "replace", "ignore"); only -// "strict" is implemented today, matching the current one-shot -// `decodeBytes` behavior. Unknown encodings return a LookupError-shaped -// Go error so the caller can surface it to Python. +// getIncrementalDecoder returns a fresh decoder for encoding. errors is +// the error-handling strategy ("strict", "replace", "ignore", +// "backslashreplace", ...); the decoders carry it and hand the complete +// portion of each chunk to the shared codecs package, which applies the +// named handler exactly as bytes.decode does. Unknown encodings return a +// LookupError-shaped Go error so the caller can surface it to Python. // // CPython: Modules/_io/textio.c:912 _textiowrapper_set_decoder // (calls _PyCodecInfo_GetIncrementalDecoder). -func getIncrementalDecoder(encoding, _ string) (IncrementalDecoder, error) { +func getIncrementalDecoder(encoding, errors string) (IncrementalDecoder, error) { + if errors == "" { + errors = "strict" + } switch normalizeCodec(encoding) { case "utf-8": - return &utf8Decoder{}, nil + return &utf8Decoder{errors: errors}, nil case "ascii": - return &asciiDecoder{}, nil + return &asciiDecoder{errors: errors}, nil case "latin-1": - return &latin1Decoder{}, nil + return &latin1Decoder{errors: errors}, nil case "utf-16": - return &utf16Decoder{variant: ""}, nil + return &utf16Decoder{variant: "", errors: errors}, nil case "utf-16-le": - return &utf16Decoder{variant: "le"}, nil + return &utf16Decoder{variant: "le", errors: errors}, nil case "utf-16-be": - return &utf16Decoder{variant: "be"}, nil + return &utf16Decoder{variant: "be", errors: errors}, nil case "utf-32": - return &utf32Decoder{variant: ""}, nil + return &utf32Decoder{variant: "", errors: errors}, nil case "utf-32-le": - return &utf32Decoder{variant: "le"}, nil + return &utf32Decoder{variant: "le", errors: errors}, nil case "utf-32-be": - return &utf32Decoder{variant: "be"}, nil + return &utf32Decoder{variant: "be", errors: errors}, nil case "cp1252": - return &charmapDecoder{table: &cp1252Table.decode, name: "cp1252"}, nil + return &charmapDecoder{table: &cp1252Table.decode, name: "cp1252", errors: errors}, nil case "cp1250": - return &charmapDecoder{table: &cp1250Table.decode, name: "cp1250"}, nil + return &charmapDecoder{table: &cp1250Table.decode, name: "cp1250", errors: errors}, nil case "cp1251": - return &charmapDecoder{table: &cp1251Table.decode, name: "cp1251"}, nil + return &charmapDecoder{table: &cp1251Table.decode, name: "cp1251", errors: errors}, nil case "cp437": - return &charmapDecoder{table: &cp437Table.decode, name: "cp437"}, nil + return &charmapDecoder{table: &cp437Table.decode, name: "cp437", errors: errors}, nil case "mac-roman": - return &charmapDecoder{table: &macRomanTable.decode, name: "mac-roman"}, nil + return &charmapDecoder{table: &macRomanTable.decode, name: "mac-roman", errors: errors}, nil } if ci, err := codecs.Lookup(encoding); err == nil { - return ®istryDecoder{ci: ci}, nil + return ®istryDecoder{ci: ci, errors: errors}, nil } return nil, fmt.Errorf("LookupError: unknown encoding: %s", encoding) } @@ -143,7 +145,8 @@ func getIncrementalEncoder(encoding, _ string) (IncrementalEncoder, error) { // incomplete multi-byte sequence. CPython's utf-8 incremental decoder // keeps the same window because a code point spans at most four bytes. type utf8Decoder struct { - buf []byte + buf []byte + errors string } func (d *utf8Decoder) Decode(input []byte, final bool) (string, error) { @@ -154,28 +157,20 @@ func (d *utf8Decoder) Decode(input []byte, final bool) (string, error) { src = append(append([]byte{}, d.buf...), input...) d.buf = d.buf[:0] } - // Walk back from the end to find the longest tail that is either - // a complete utf-8 sequence or an incomplete (but valid so-far) - // prefix. RuneStart marks the first byte of a sequence. - keep := 0 - if !final && len(src) > 0 { - for i := len(src) - 1; i >= 0 && i >= len(src)-4; i-- { - if utf8.RuneStart(src[i]) { - if !utf8.FullRune(src[i:]) { - keep = len(src) - i - } - break - } - } - } - complete := src[:len(src)-keep] - if !utf8.Valid(complete) { - return "", fmt.Errorf("UnicodeDecodeError: invalid utf-8 sequence") + // DecodeUTF8Incremental holds back an incomplete trailing sequence + // when final is false and applies the configured error handler to + // the complete portion, so an invalid byte under "ignore" / + // "replace" / "backslashreplace" is repaired instead of raising. + // + // CPython: Objects/unicodeobject.c:4756 PyUnicode_DecodeUTF8Stateful + out, remaining, err := codecs.DecodeUTF8Incremental(src, d.errors, final) + if err != nil { + return "", err } - if keep > 0 { - d.buf = append(d.buf[:0], src[len(src)-keep:]...) + if len(remaining) > 0 { + d.buf = append(d.buf[:0], remaining...) } - return string(complete), nil + return out, nil } func (d *utf8Decoder) GetState() ([]byte, int64) { return append([]byte{}, d.buf...), 0 } @@ -187,15 +182,11 @@ func (d *utf8Decoder) Reset() { d.buf = d.buf[:0] } // --- ascii / latin-1 ------------------------------------------------------- -type asciiDecoder struct{} +type asciiDecoder struct{ errors string } -func (asciiDecoder) Decode(input []byte, _ bool) (string, error) { - for _, b := range input { - if b > 127 { - return "", fmt.Errorf("UnicodeDecodeError: ordinal not in range(128)") - } - } - return string(input), nil +func (d asciiDecoder) Decode(input []byte, _ bool) (string, error) { + out, _, err := codecs.Decode(input, "ascii", d.errors) + return out, err } func (asciiDecoder) GetState() ([]byte, int64) { return nil, 0 } func (asciiDecoder) SetState([]byte, int64) error { return nil } @@ -210,14 +201,13 @@ func encodeASCII(s string) ([]byte, error) { return []byte(s), nil } -type latin1Decoder struct{} +type latin1Decoder struct{ errors string } -func (latin1Decoder) Decode(input []byte, _ bool) (string, error) { - runes := make([]rune, len(input)) - for i, b := range input { - runes[i] = rune(b) - } - return string(runes), nil +func (d latin1Decoder) Decode(input []byte, _ bool) (string, error) { + // latin-1 maps every byte to a code point, so the error handler is + // never invoked, but route through codecs for uniformity. + out, _, err := codecs.Decode(input, "latin-1", d.errors) + return out, err } func (latin1Decoder) GetState() ([]byte, int64) { return nil, 0 } func (latin1Decoder) SetState([]byte, int64) error { return nil } @@ -242,6 +232,7 @@ func encodeLatin1(s string) ([]byte, error) { type utf16Decoder struct { variant string // "", "le", or "be" buf []byte + errors string // flags encodes endianness for tell/seek snapshots. // 0 = undecided (auto-variant before BOM sniff) // 1 = little-endian @@ -294,18 +285,21 @@ func (d *utf16Decoder) Decode(input []byte, final bool) (string, error) { } } keep := len(src) % 2 - if final && keep != 0 { - return "", fmt.Errorf("UnicodeDecodeError: utf-16 truncated (odd byte count)") + if final { + // A trailing half code unit on the final chunk is a truncation + // the error handler must see; hand the whole tail to codecs. + keep = 0 } body := src[:len(src)-keep] if keep > 0 { d.buf = append(d.buf, src[len(src)-keep:]...) } - units := make([]uint16, len(body)/2) - for i := range units { - units[i] = bo.Uint16(body[2*i:]) + name := "utf-16-le" + if bo == binary.BigEndian { + name = "utf-16-be" } - return string(utf16.Decode(units)), nil + out, _, err := codecs.Decode(body, name, d.errors) + return out, err } func (d *utf16Decoder) GetState() ([]byte, int64) { @@ -328,6 +322,7 @@ func (d *utf16Decoder) Reset() { type utf32Decoder struct { variant string buf []byte + errors string flags int64 } @@ -372,22 +367,21 @@ func (d *utf32Decoder) Decode(input []byte, final bool) (string, error) { } } keep := len(src) % 4 - if final && keep != 0 { - return "", fmt.Errorf("UnicodeDecodeError: utf-32 truncated (length %% 4 != 0)") + if final { + // A trailing partial code unit on the final chunk is a + // truncation the error handler must see. + keep = 0 } body := src[:len(src)-keep] if keep > 0 { d.buf = append(d.buf, src[len(src)-keep:]...) } - runes := make([]rune, 0, len(body)/4) - for i := 0; i < len(body); i += 4 { - cp := bo.Uint32(body[i:]) - if cp > 0x10FFFF || (cp >= 0xD800 && cp <= 0xDFFF) { - return "", fmt.Errorf("UnicodeDecodeError: invalid utf-32 codepoint U+%X", cp) - } - runes = append(runes, rune(cp)) + name := "utf-32-le" + if bo == binary.BigEndian { + name = "utf-32-be" } - return string(runes), nil + out, _, err := codecs.Decode(body, name, d.errors) + return out, err } func (d *utf32Decoder) GetState() ([]byte, int64) { @@ -408,12 +402,14 @@ func (d *utf32Decoder) Reset() { // --- charmap (single-byte) ------------------------------------------------- type charmapDecoder struct { - table *[256]rune - name string + table *[256]rune + name string + errors string } func (d *charmapDecoder) Decode(input []byte, _ bool) (string, error) { - return charmapDecode(input, d.table, d.name) + out, _, err := codecs.Decode(input, d.name, d.errors) + return out, err } func (d *charmapDecoder) GetState() ([]byte, int64) { return nil, 0 } func (d *charmapDecoder) SetState([]byte, int64) error { return nil } @@ -466,14 +462,15 @@ func (e *bomEncoder) Reset() { e.state = 0 } // // CPython: Python/codecs.c:570 _PyCodecInfo_GetIncrementalDecoder type registryDecoder struct { - ci *codecs.CodecInfo - buf []byte - out string + ci *codecs.CodecInfo + buf []byte + out string + errors string } func (d *registryDecoder) Decode(input []byte, final bool) (string, error) { d.buf = append(d.buf, input...) - s, _, err := d.ci.Decode(d.buf, "strict") + s, _, err := d.ci.Decode(d.buf, d.errors) if err != nil { // Allow buffering when not final: a trailing incomplete sequence // may complete on the next chunk. @@ -497,7 +494,7 @@ func (d *registryDecoder) SetState(buffer []byte, _ int64) error { if len(buffer) == 0 { return nil } - s, _, err := d.ci.Decode(d.buf, "strict") + s, _, err := d.ci.Decode(d.buf, d.errors) if err == nil { d.out = s } From 5b988fd81f6d32e6b19d62480c2b968a9d30fb5d Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 00:03:04 +0700 Subject: [PATCH 67/84] thread: release the GIL in time.sleep and publish child ident before enter time.sleep parked the interpreter with the GIL held, so a thread that slept starved every other Python thread. Wrap the sleep in AllowThreads, the gopy spelling of Py_BEGIN_ALLOW_THREADS that time_sleep uses, so siblings run while one thread waits. This is what unblocked test_importlib/test_locks, which spins up nine threads that each sleep between contended _ModuleLock acquires. start_new_thread also handed the child its ident only after enter() took the GIL. The parent still held the GIL and blocked waiting on that ident, so the child could never make progress. Publish the ident before enter() so the parent gets to its next allow-threads point. Vendor lock_tests and test_py_compile so test_locks and the source loader tests import their helpers. --- module/_thread/module.go | 14 +- module/_time/module.go | 6 +- stdlib/test/lock_tests.py | 1260 ++++++++++++++++++++++++++++++++ stdlib/test/test_py_compile.py | 310 ++++++++ 4 files changed, 1588 insertions(+), 2 deletions(-) create mode 100644 stdlib/test/lock_tests.py create mode 100644 stdlib/test/test_py_compile.py diff --git a/module/_thread/module.go b/module/_thread/module.go index 2f85106a..422efa68 100644 --- a/module/_thread/module.go +++ b/module/_thread/module.go @@ -499,9 +499,21 @@ func threadStartNewThread(args []objects.Object, kwargs map[string]objects.Objec go func() { defer atomic.AddInt64(&activeThreadCount, -1) if enter != nil { + // The identity is already known synchronously (the spawn hook + // returned it on the parent goroutine), so hand it back before + // enter() takes the GIL. enter() blocks until the GIL is free, + // and the parent is the holder: it only releases the lock once + // it returns from start_new_thread and later blocks (on a join, + // lock, or sleep) through Py_BEGIN_ALLOW_THREADS. Sending the id + // first lets the parent get that far instead of deadlocking + // against a child that cannot publish its id until it owns a GIL + // the parent still holds. + // + // CPython: Modules/_threadmodule.c:1166 thread_PyThread_start_new_thread + // returns the ident before the bootstrap thread runs. + idCh <- ident enter() defer leave() - idCh <- ident } else { idCh <- goid() } diff --git a/module/_time/module.go b/module/_time/module.go index 685b82e4..498e6179 100644 --- a/module/_time/module.go +++ b/module/_time/module.go @@ -355,7 +355,11 @@ func sleep(args []objects.Object, _ map[string]objects.Object) (objects.Object, return nil, fmt.Errorf("ValueError: sleep length must be non-negative") } if secs > 0 { - gotime.Sleep(gotime.Duration(secs * float64(gotime.Second))) + // Release the GIL while parked so other Python threads run. + // CPython: Modules/timemodule.c:394 time_sleep (Py_BEGIN_ALLOW_THREADS) + objects.AllowThreads(func() { + gotime.Sleep(gotime.Duration(secs * float64(gotime.Second))) + }) } return objects.None(), nil } diff --git a/stdlib/test/lock_tests.py b/stdlib/test/lock_tests.py new file mode 100644 index 00000000..fb11f482 --- /dev/null +++ b/stdlib/test/lock_tests.py @@ -0,0 +1,1260 @@ +""" +Various tests for synchronization primitives. +""" + +import gc +import sys +import time +from _thread import start_new_thread, TIMEOUT_MAX +import threading +import unittest +import weakref + +from test import support +from test.support import threading_helper + + +requires_fork = unittest.skipUnless(support.has_fork_support, + "platform doesn't support fork " + "(no _at_fork_reinit method)") + + +def wait_threads_blocked(nthread): + # Arbitrary sleep to wait until N threads are blocked, + # like waiting for a lock. + time.sleep(0.010 * nthread) + + +class Bunch(object): + """ + A bunch of threads. + """ + def __init__(self, func, nthread, wait_before_exit=False): + """ + Construct a bunch of `nthread` threads running the same function `func`. + If `wait_before_exit` is True, the threads won't terminate until + do_finish() is called. + """ + self.func = func + self.nthread = nthread + self.started = [] + self.finished = [] + self.exceptions = [] + self._can_exit = not wait_before_exit + self._wait_thread = None + + def task(self): + tid = threading.get_ident() + self.started.append(tid) + try: + self.func() + except BaseException as exc: + self.exceptions.append(exc) + finally: + self.finished.append(tid) + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if self._can_exit: + break + + def __enter__(self): + self._wait_thread = threading_helper.wait_threads_exit(support.SHORT_TIMEOUT) + self._wait_thread.__enter__() + + try: + for _ in range(self.nthread): + start_new_thread(self.task, ()) + except: + self._can_exit = True + raise + + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(self.started) >= self.nthread: + break + + return self + + def __exit__(self, exc_type, exc_value, traceback): + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(self.finished) >= self.nthread: + break + + # Wait until threads completely exit according to _thread._count() + self._wait_thread.__exit__(None, None, None) + + # Break reference cycle + exceptions = self.exceptions + self.exceptions = None + if exceptions: + raise ExceptionGroup(f"{self.func} threads raised exceptions", + exceptions) + + def do_finish(self): + self._can_exit = True + + +class BaseTestCase(unittest.TestCase): + def setUp(self): + self._threads = threading_helper.threading_setup() + + def tearDown(self): + threading_helper.threading_cleanup(*self._threads) + support.reap_children() + + def assertTimeout(self, actual, expected): + # The waiting and/or time.monotonic() can be imprecise, which + # is why comparing to the expected value would sometimes fail + # (especially under Windows). + self.assertGreaterEqual(actual, expected * 0.6) + # Test nothing insane happened + self.assertLess(actual, expected * 10.0) + + +class BaseLockTests(BaseTestCase): + """ + Tests for both recursive and non-recursive locks. + """ + + def wait_phase(self, phase, expected): + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(phase) >= expected: + break + self.assertEqual(len(phase), expected) + + def test_constructor(self): + lock = self.locktype() + del lock + + def test_repr(self): + lock = self.locktype() + self.assertRegex(repr(lock), "") + del lock + + def test_locked_repr(self): + lock = self.locktype() + lock.acquire() + self.assertRegex(repr(lock), "") + del lock + + def test_acquire_destroy(self): + lock = self.locktype() + lock.acquire() + del lock + + def test_acquire_release(self): + lock = self.locktype() + lock.acquire() + lock.release() + del lock + + def test_try_acquire(self): + lock = self.locktype() + self.assertTrue(lock.acquire(False)) + lock.release() + + def test_try_acquire_contended(self): + lock = self.locktype() + lock.acquire() + result = [] + def f(): + result.append(lock.acquire(False)) + with Bunch(f, 1): + pass + self.assertFalse(result[0]) + lock.release() + + def test_acquire_contended(self): + lock = self.locktype() + lock.acquire() + def f(): + lock.acquire() + lock.release() + + N = 5 + with Bunch(f, N) as bunch: + # Threads block on lock.acquire() + wait_threads_blocked(N) + self.assertEqual(len(bunch.finished), 0) + + # Threads unblocked + lock.release() + + self.assertEqual(len(bunch.finished), N) + + def test_with(self): + lock = self.locktype() + def f(): + lock.acquire() + lock.release() + + def with_lock(err=None): + with lock: + if err is not None: + raise err + + # Acquire the lock, do nothing, with releases the lock + with lock: + pass + + # Check that the lock is unacquired + with Bunch(f, 1): + pass + + # Acquire the lock, raise an exception, with releases the lock + with self.assertRaises(TypeError): + with lock: + raise TypeError + + # Check that the lock is unacquired even if after an exception + # was raised in the previous "with lock:" block + with Bunch(f, 1): + pass + + def test_thread_leak(self): + # The lock shouldn't leak a Thread instance when used from a foreign + # (non-threading) thread. + lock = self.locktype() + def f(): + lock.acquire() + lock.release() + + # We run many threads in the hope that existing threads ids won't + # be recycled. + with Bunch(f, 15): + pass + + def test_timeout(self): + lock = self.locktype() + # Can't set timeout if not blocking + self.assertRaises(ValueError, lock.acquire, False, 1) + # Invalid timeout values + self.assertRaises(ValueError, lock.acquire, timeout=-100) + self.assertRaises(OverflowError, lock.acquire, timeout=1e100) + self.assertRaises(OverflowError, lock.acquire, timeout=TIMEOUT_MAX + 1) + # TIMEOUT_MAX is ok + lock.acquire(timeout=TIMEOUT_MAX) + lock.release() + t1 = time.monotonic() + self.assertTrue(lock.acquire(timeout=5)) + t2 = time.monotonic() + # Just a sanity test that it didn't actually wait for the timeout. + self.assertLess(t2 - t1, 5) + results = [] + def f(): + t1 = time.monotonic() + results.append(lock.acquire(timeout=0.5)) + t2 = time.monotonic() + results.append(t2 - t1) + with Bunch(f, 1): + pass + self.assertFalse(results[0]) + self.assertTimeout(results[1], 0.5) + + def test_weakref_exists(self): + lock = self.locktype() + ref = weakref.ref(lock) + self.assertIsNotNone(ref()) + + def test_weakref_deleted(self): + lock = self.locktype() + ref = weakref.ref(lock) + del lock + gc.collect() # For PyPy or other GCs. + self.assertIsNone(ref()) + + +class LockTests(BaseLockTests): + """ + Tests for non-recursive, weak locks + (which can be acquired and released from different threads). + """ + def test_reacquire(self): + # Lock needs to be released before re-acquiring. + lock = self.locktype() + phase = [] + + def f(): + lock.acquire() + phase.append(None) + lock.acquire() + phase.append(None) + + with threading_helper.wait_threads_exit(): + # Thread blocked on lock.acquire() + start_new_thread(f, ()) + self.wait_phase(phase, 1) + + # Thread unblocked + lock.release() + self.wait_phase(phase, 2) + + def test_different_thread(self): + # Lock can be released from a different thread. + lock = self.locktype() + lock.acquire() + def f(): + lock.release() + with Bunch(f, 1): + pass + lock.acquire() + lock.release() + + def test_state_after_timeout(self): + # Issue #11618: check that lock is in a proper state after a + # (non-zero) timeout. + lock = self.locktype() + lock.acquire() + self.assertFalse(lock.acquire(timeout=0.01)) + lock.release() + self.assertFalse(lock.locked()) + self.assertTrue(lock.acquire(blocking=False)) + + @requires_fork + def test_at_fork_reinit(self): + def use_lock(lock): + # make sure that the lock still works normally + # after _at_fork_reinit() + lock.acquire() + lock.release() + + # unlocked + lock = self.locktype() + lock._at_fork_reinit() + use_lock(lock) + + # locked: _at_fork_reinit() resets the lock to the unlocked state + lock2 = self.locktype() + lock2.acquire() + lock2._at_fork_reinit() + use_lock(lock2) + + +class RLockTests(BaseLockTests): + """ + Tests for recursive locks. + """ + def test_repr_count(self): + # see gh-134322: check that count values are correct: + # when a rlock is just created, + # in a second thread when rlock is acquired in the main thread. + lock = self.locktype() + self.assertIn("count=0", repr(lock)) + self.assertIn("") + evt.set() + self.assertRegex(repr(evt), r"<\w+\.Event at .*: set>") + + +class ConditionTests(BaseTestCase): + """ + Tests for condition variables. + """ + + def test_acquire(self): + cond = self.condtype() + # Be default we have an RLock: the condition can be acquired multiple + # times. + cond.acquire() + cond.acquire() + cond.release() + cond.release() + lock = threading.Lock() + cond = self.condtype(lock) + cond.acquire() + self.assertFalse(lock.acquire(False)) + cond.release() + self.assertTrue(lock.acquire(False)) + self.assertFalse(cond.acquire(False)) + lock.release() + with cond: + self.assertFalse(lock.acquire(False)) + + def test_unacquired_wait(self): + cond = self.condtype() + self.assertRaises(RuntimeError, cond.wait) + + def test_unacquired_notify(self): + cond = self.condtype() + self.assertRaises(RuntimeError, cond.notify) + + def _check_notify(self, cond): + # Note that this test is sensitive to timing. If the worker threads + # don't execute in a timely fashion, the main thread may think they + # are further along then they are. The main thread therefore issues + # wait_threads_blocked() statements to try to make sure that it doesn't + # race ahead of the workers. + # Secondly, this test assumes that condition variables are not subject + # to spurious wakeups. The absence of spurious wakeups is an implementation + # detail of Condition Variables in current CPython, but in general, not + # a guaranteed property of condition variables as a programming + # construct. In particular, it is possible that this can no longer + # be conveniently guaranteed should their implementation ever change. + ready = [] + results1 = [] + results2 = [] + phase_num = 0 + def f(): + cond.acquire() + ready.append(phase_num) + result = cond.wait() + + cond.release() + results1.append((result, phase_num)) + + cond.acquire() + ready.append(phase_num) + + result = cond.wait() + cond.release() + results2.append((result, phase_num)) + + N = 5 + with Bunch(f, N): + # first wait, to ensure all workers settle into cond.wait() before + # we continue. See issues #8799 and #30727. + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(ready) >= N: + break + + ready.clear() + self.assertEqual(results1, []) + + # Notify 3 threads at first + count1 = 3 + cond.acquire() + cond.notify(count1) + wait_threads_blocked(count1) + + # Phase 1 + phase_num = 1 + cond.release() + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(results1) >= count1: + break + + self.assertEqual(results1, [(True, 1)] * count1) + self.assertEqual(results2, []) + + # Wait until awaken workers are blocked on cond.wait() + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(ready) >= count1 : + break + + # Notify 5 threads: they might be in their first or second wait + cond.acquire() + cond.notify(5) + wait_threads_blocked(N) + + # Phase 2 + phase_num = 2 + cond.release() + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(results1) + len(results2) >= (N + count1): + break + + count2 = N - count1 + self.assertEqual(results1, [(True, 1)] * count1 + [(True, 2)] * count2) + self.assertEqual(results2, [(True, 2)] * count1) + + # Make sure all workers settle into cond.wait() + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(ready) >= N: + break + + # Notify all threads: they are all in their second wait + cond.acquire() + cond.notify_all() + wait_threads_blocked(N) + + # Phase 3 + phase_num = 3 + cond.release() + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(results2) >= N: + break + self.assertEqual(results1, [(True, 1)] * count1 + [(True, 2)] * count2) + self.assertEqual(results2, [(True, 2)] * count1 + [(True, 3)] * count2) + + def test_notify(self): + cond = self.condtype() + self._check_notify(cond) + # A second time, to check internal state is still ok. + self._check_notify(cond) + + def test_timeout(self): + cond = self.condtype() + timeout = 0.5 + results = [] + def f(): + cond.acquire() + t1 = time.monotonic() + result = cond.wait(timeout) + t2 = time.monotonic() + cond.release() + results.append((t2 - t1, result)) + + N = 5 + with Bunch(f, N): + pass + self.assertEqual(len(results), N) + + for dt, result in results: + self.assertTimeout(dt, timeout) + # Note that conceptually (that"s the condition variable protocol) + # a wait() may succeed even if no one notifies us and before any + # timeout occurs. Spurious wakeups can occur. + # This makes it hard to verify the result value. + # In practice, this implementation has no spurious wakeups. + self.assertFalse(result) + + def test_waitfor(self): + cond = self.condtype() + state = 0 + def f(): + with cond: + result = cond.wait_for(lambda: state == 4) + self.assertTrue(result) + self.assertEqual(state, 4) + + with Bunch(f, 1): + for i in range(4): + time.sleep(0.010) + with cond: + state += 1 + cond.notify() + + def test_waitfor_timeout(self): + cond = self.condtype() + state = 0 + success = [] + def f(): + with cond: + dt = time.monotonic() + result = cond.wait_for(lambda : state==4, timeout=0.1) + dt = time.monotonic() - dt + self.assertFalse(result) + self.assertTimeout(dt, 0.1) + success.append(None) + + with Bunch(f, 1): + # Only increment 3 times, so state == 4 is never reached. + for i in range(3): + time.sleep(0.010) + with cond: + state += 1 + cond.notify() + + self.assertEqual(len(success), 1) + + +class BaseSemaphoreTests(BaseTestCase): + """ + Common tests for {bounded, unbounded} semaphore objects. + """ + + def test_constructor(self): + self.assertRaises(ValueError, self.semtype, value = -1) + self.assertRaises(ValueError, self.semtype, value = -sys.maxsize) + + def test_acquire(self): + sem = self.semtype(1) + sem.acquire() + sem.release() + sem = self.semtype(2) + sem.acquire() + sem.acquire() + sem.release() + sem.release() + + def test_acquire_destroy(self): + sem = self.semtype() + sem.acquire() + del sem + + def test_acquire_contended(self): + sem_value = 7 + sem = self.semtype(sem_value) + sem.acquire() + + sem_results = [] + results1 = [] + results2 = [] + phase_num = 0 + + def func(): + sem_results.append(sem.acquire()) + results1.append(phase_num) + + sem_results.append(sem.acquire()) + results2.append(phase_num) + + def wait_count(count): + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(results1) + len(results2) >= count: + break + + N = 10 + with Bunch(func, N): + # Phase 0 + count1 = sem_value - 1 + wait_count(count1) + self.assertEqual(results1 + results2, [0] * count1) + + # Phase 1 + phase_num = 1 + for i in range(sem_value): + sem.release() + count2 = sem_value + wait_count(count1 + count2) + self.assertEqual(sorted(results1 + results2), + [0] * count1 + [1] * count2) + + # Phase 2 + phase_num = 2 + count3 = (sem_value - 1) + for i in range(count3): + sem.release() + wait_count(count1 + count2 + count3) + self.assertEqual(sorted(results1 + results2), + [0] * count1 + [1] * count2 + [2] * count3) + # The semaphore is still locked + self.assertFalse(sem.acquire(False)) + + # Final release, to let the last thread finish + count4 = 1 + sem.release() + + self.assertEqual(sem_results, + [True] * (count1 + count2 + count3 + count4)) + + def test_multirelease(self): + sem_value = 7 + sem = self.semtype(sem_value) + sem.acquire() + + results1 = [] + results2 = [] + phase_num = 0 + def func(): + sem.acquire() + results1.append(phase_num) + + sem.acquire() + results2.append(phase_num) + + def wait_count(count): + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if len(results1) + len(results2) >= count: + break + + with Bunch(func, 10): + # Phase 0 + count1 = sem_value - 1 + wait_count(count1) + self.assertEqual(results1 + results2, [0] * count1) + + # Phase 1 + phase_num = 1 + count2 = sem_value + sem.release(count2) + wait_count(count1 + count2) + self.assertEqual(sorted(results1 + results2), + [0] * count1 + [1] * count2) + + # Phase 2 + phase_num = 2 + count3 = sem_value - 1 + sem.release(count3) + wait_count(count1 + count2 + count3) + self.assertEqual(sorted(results1 + results2), + [0] * count1 + [1] * count2 + [2] * count3) + # The semaphore is still locked + self.assertFalse(sem.acquire(False)) + + # Final release, to let the last thread finish + sem.release() + + def test_try_acquire(self): + sem = self.semtype(2) + self.assertTrue(sem.acquire(False)) + self.assertTrue(sem.acquire(False)) + self.assertFalse(sem.acquire(False)) + sem.release() + self.assertTrue(sem.acquire(False)) + + def test_try_acquire_contended(self): + sem = self.semtype(4) + sem.acquire() + results = [] + def f(): + results.append(sem.acquire(False)) + results.append(sem.acquire(False)) + with Bunch(f, 5): + pass + # There can be a thread switch between acquiring the semaphore and + # appending the result, therefore results will not necessarily be + # ordered. + self.assertEqual(sorted(results), [False] * 7 + [True] * 3 ) + + def test_acquire_timeout(self): + sem = self.semtype(2) + self.assertRaises(ValueError, sem.acquire, False, timeout=1.0) + self.assertTrue(sem.acquire(timeout=0.005)) + self.assertTrue(sem.acquire(timeout=0.005)) + self.assertFalse(sem.acquire(timeout=0.005)) + sem.release() + self.assertTrue(sem.acquire(timeout=0.005)) + t = time.monotonic() + self.assertFalse(sem.acquire(timeout=0.5)) + dt = time.monotonic() - t + self.assertTimeout(dt, 0.5) + + def test_default_value(self): + # The default initial value is 1. + sem = self.semtype() + sem.acquire() + def f(): + sem.acquire() + sem.release() + + with Bunch(f, 1) as bunch: + # Thread blocked on sem.acquire() + wait_threads_blocked(1) + self.assertFalse(bunch.finished) + + # Thread unblocked + sem.release() + + def test_with(self): + sem = self.semtype(2) + def _with(err=None): + with sem: + self.assertTrue(sem.acquire(False)) + sem.release() + with sem: + self.assertFalse(sem.acquire(False)) + if err: + raise err + _with() + self.assertTrue(sem.acquire(False)) + sem.release() + self.assertRaises(TypeError, _with, TypeError) + self.assertTrue(sem.acquire(False)) + sem.release() + +class SemaphoreTests(BaseSemaphoreTests): + """ + Tests for unbounded semaphores. + """ + + def test_release_unacquired(self): + # Unbounded releases are allowed and increment the semaphore's value + sem = self.semtype(1) + sem.release() + sem.acquire() + sem.acquire() + sem.release() + + def test_repr(self): + sem = self.semtype(3) + self.assertRegex(repr(sem), r"<\w+\.Semaphore at .*: value=3>") + sem.acquire() + self.assertRegex(repr(sem), r"<\w+\.Semaphore at .*: value=2>") + sem.release() + sem.release() + self.assertRegex(repr(sem), r"<\w+\.Semaphore at .*: value=4>") + + +class BoundedSemaphoreTests(BaseSemaphoreTests): + """ + Tests for bounded semaphores. + """ + + def test_release_unacquired(self): + # Cannot go past the initial value + sem = self.semtype() + self.assertRaises(ValueError, sem.release) + sem.acquire() + sem.release() + self.assertRaises(ValueError, sem.release) + + def test_repr(self): + sem = self.semtype(3) + self.assertRegex(repr(sem), r"<\w+\.BoundedSemaphore at .*: value=3/3>") + sem.acquire() + self.assertRegex(repr(sem), r"<\w+\.BoundedSemaphore at .*: value=2/3>") + + +class BarrierTests(BaseTestCase): + """ + Tests for Barrier objects. + """ + N = 5 + defaultTimeout = 2.0 + + def setUp(self): + self.barrier = self.barriertype(self.N, timeout=self.defaultTimeout) + + def tearDown(self): + self.barrier.abort() + + def run_threads(self, f): + with Bunch(f, self.N): + pass + + def multipass(self, results, n): + m = self.barrier.parties + self.assertEqual(m, self.N) + for i in range(n): + results[0].append(True) + self.assertEqual(len(results[1]), i * m) + self.barrier.wait() + results[1].append(True) + self.assertEqual(len(results[0]), (i + 1) * m) + self.barrier.wait() + self.assertEqual(self.barrier.n_waiting, 0) + self.assertFalse(self.barrier.broken) + + def test_constructor(self): + self.assertRaises(ValueError, self.barriertype, parties=0) + self.assertRaises(ValueError, self.barriertype, parties=-1) + + def test_barrier(self, passes=1): + """ + Test that a barrier is passed in lockstep + """ + results = [[],[]] + def f(): + self.multipass(results, passes) + self.run_threads(f) + + def test_barrier_10(self): + """ + Test that a barrier works for 10 consecutive runs + """ + return self.test_barrier(10) + + def test_wait_return(self): + """ + test the return value from barrier.wait + """ + results = [] + def f(): + r = self.barrier.wait() + results.append(r) + + self.run_threads(f) + self.assertEqual(sum(results), sum(range(self.N))) + + def test_action(self): + """ + Test the 'action' callback + """ + results = [] + def action(): + results.append(True) + barrier = self.barriertype(self.N, action) + def f(): + barrier.wait() + self.assertEqual(len(results), 1) + + self.run_threads(f) + + def test_abort(self): + """ + Test that an abort will put the barrier in a broken state + """ + results1 = [] + results2 = [] + def f(): + try: + i = self.barrier.wait() + if i == self.N//2: + raise RuntimeError + self.barrier.wait() + results1.append(True) + except threading.BrokenBarrierError: + results2.append(True) + except RuntimeError: + self.barrier.abort() + pass + + self.run_threads(f) + self.assertEqual(len(results1), 0) + self.assertEqual(len(results2), self.N-1) + self.assertTrue(self.barrier.broken) + + def test_reset(self): + """ + Test that a 'reset' on a barrier frees the waiting threads + """ + results1 = [] + results2 = [] + results3 = [] + def f(): + i = self.barrier.wait() + if i == self.N//2: + # Wait until the other threads are all in the barrier. + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if self.barrier.n_waiting >= (self.N - 1): + break + self.barrier.reset() + else: + try: + self.barrier.wait() + results1.append(True) + except threading.BrokenBarrierError: + results2.append(True) + # Now, pass the barrier again + self.barrier.wait() + results3.append(True) + + self.run_threads(f) + self.assertEqual(len(results1), 0) + self.assertEqual(len(results2), self.N-1) + self.assertEqual(len(results3), self.N) + + + def test_abort_and_reset(self): + """ + Test that a barrier can be reset after being broken. + """ + results1 = [] + results2 = [] + results3 = [] + barrier2 = self.barriertype(self.N) + def f(): + try: + i = self.barrier.wait() + if i == self.N//2: + raise RuntimeError + self.barrier.wait() + results1.append(True) + except threading.BrokenBarrierError: + results2.append(True) + except RuntimeError: + self.barrier.abort() + pass + # Synchronize and reset the barrier. Must synchronize first so + # that everyone has left it when we reset, and after so that no + # one enters it before the reset. + if barrier2.wait() == self.N//2: + self.barrier.reset() + barrier2.wait() + self.barrier.wait() + results3.append(True) + + self.run_threads(f) + self.assertEqual(len(results1), 0) + self.assertEqual(len(results2), self.N-1) + self.assertEqual(len(results3), self.N) + + def test_timeout(self): + """ + Test wait(timeout) + """ + def f(): + i = self.barrier.wait() + if i == self.N // 2: + # One thread is late! + time.sleep(self.defaultTimeout / 2) + # Default timeout is 2.0, so this is shorter. + self.assertRaises(threading.BrokenBarrierError, + self.barrier.wait, self.defaultTimeout / 4) + self.run_threads(f) + + def test_default_timeout(self): + """ + Test the barrier's default timeout + """ + timeout = 0.100 + barrier = self.barriertype(2, timeout=timeout) + def f(): + self.assertRaises(threading.BrokenBarrierError, + barrier.wait) + + start_time = time.monotonic() + with Bunch(f, 1): + pass + dt = time.monotonic() - start_time + self.assertGreaterEqual(dt, timeout) + + def test_single_thread(self): + b = self.barriertype(1) + b.wait() + b.wait() + + def test_repr(self): + barrier = self.barriertype(3) + timeout = support.LONG_TIMEOUT + self.assertRegex(repr(barrier), r"<\w+\.Barrier at .*: waiters=0/3>") + def f(): + barrier.wait(timeout) + + N = 2 + with Bunch(f, N): + # Threads blocked on barrier.wait() + for _ in support.sleeping_retry(support.SHORT_TIMEOUT): + if barrier.n_waiting >= N: + break + self.assertRegex(repr(barrier), + r"<\w+\.Barrier at .*: waiters=2/3>") + + # Threads unblocked + barrier.wait(timeout) + + self.assertRegex(repr(barrier), + r"<\w+\.Barrier at .*: waiters=0/3>") + + # Abort the barrier + barrier.abort() + self.assertRegex(repr(barrier), + r"<\w+\.Barrier at .*: broken>") diff --git a/stdlib/test/test_py_compile.py b/stdlib/test/test_py_compile.py new file mode 100644 index 00000000..749a877d --- /dev/null +++ b/stdlib/test/test_py_compile.py @@ -0,0 +1,310 @@ +import functools +import importlib.util +import os +import py_compile +import shutil +import stat +import subprocess +import sys +import tempfile +import unittest + +from test import support +from test.support import os_helper, script_helper + + +def without_source_date_epoch(fxn): + """Runs function with SOURCE_DATE_EPOCH unset.""" + @functools.wraps(fxn) + def wrapper(*args, **kwargs): + with os_helper.EnvironmentVarGuard() as env: + env.unset('SOURCE_DATE_EPOCH') + return fxn(*args, **kwargs) + return wrapper + + +def with_source_date_epoch(fxn): + """Runs function with SOURCE_DATE_EPOCH set.""" + @functools.wraps(fxn) + def wrapper(*args, **kwargs): + with os_helper.EnvironmentVarGuard() as env: + env['SOURCE_DATE_EPOCH'] = '123456789' + return fxn(*args, **kwargs) + return wrapper + + +# Run tests with SOURCE_DATE_EPOCH set or unset explicitly. +class SourceDateEpochTestMeta(type(unittest.TestCase)): + def __new__(mcls, name, bases, dct, *, source_date_epoch): + cls = super().__new__(mcls, name, bases, dct) + + for attr in dir(cls): + if attr.startswith('test_'): + meth = getattr(cls, attr) + if source_date_epoch: + wrapper = with_source_date_epoch(meth) + else: + wrapper = without_source_date_epoch(meth) + setattr(cls, attr, wrapper) + + return cls + + +class PyCompileTestsBase: + + def setUp(self): + self.directory = tempfile.mkdtemp(dir=os.getcwd()) + self.source_path = os.path.join(self.directory, '_test.py') + self.pyc_path = self.source_path + 'c' + self.cache_path = importlib.util.cache_from_source(self.source_path) + self.cwd_drive = os.path.splitdrive(os.getcwd())[0] + # In these tests we compute relative paths. When using Windows, the + # current working directory path and the 'self.source_path' might be + # on different drives. Therefore we need to switch to the drive where + # the temporary source file lives. + drive = os.path.splitdrive(self.source_path)[0] + if drive: + os.chdir(drive) + with open(self.source_path, 'w') as file: + file.write('x = 123\n') + + def tearDown(self): + shutil.rmtree(self.directory) + if self.cwd_drive: + os.chdir(self.cwd_drive) + + def test_absolute_path(self): + py_compile.compile(self.source_path, self.pyc_path) + self.assertTrue(os.path.exists(self.pyc_path)) + self.assertFalse(os.path.exists(self.cache_path)) + + def test_do_not_overwrite_symlinks(self): + # In the face of a cfile argument being a symlink, bail out. + # Issue #17222 + try: + os.symlink(self.pyc_path + '.actual', self.pyc_path) + except (NotImplementedError, OSError): + self.skipTest('need to be able to create a symlink for a file') + else: + assert os.path.islink(self.pyc_path) + with self.assertRaises(FileExistsError): + py_compile.compile(self.source_path, self.pyc_path) + + @unittest.skipIf(not os.path.exists(os.devnull) or os.path.isfile(os.devnull), + 'requires os.devnull and for it to be a non-regular file') + def test_do_not_overwrite_nonregular_files(self): + # In the face of a cfile argument being a non-regular file, bail out. + # Issue #17222 + with self.assertRaises(FileExistsError): + py_compile.compile(self.source_path, os.devnull) + + def test_cache_path(self): + py_compile.compile(self.source_path) + self.assertTrue(os.path.exists(self.cache_path)) + + def test_cwd(self): + with os_helper.change_cwd(self.directory): + py_compile.compile(os.path.basename(self.source_path), + os.path.basename(self.pyc_path)) + self.assertTrue(os.path.exists(self.pyc_path)) + self.assertFalse(os.path.exists(self.cache_path)) + + def test_relative_path(self): + py_compile.compile(os.path.relpath(self.source_path), + os.path.relpath(self.pyc_path)) + self.assertTrue(os.path.exists(self.pyc_path)) + self.assertFalse(os.path.exists(self.cache_path)) + + @os_helper.skip_if_dac_override + @unittest.skipIf(os.name == 'nt', + 'cannot control directory permissions on Windows') + @os_helper.skip_unless_working_chmod + def test_exceptions_propagate(self): + # Make sure that exceptions raised thanks to issues with writing + # bytecode. + # http://bugs.python.org/issue17244 + mode = os.stat(self.directory) + os.chmod(self.directory, stat.S_IREAD) + try: + with self.assertRaises(IOError): + py_compile.compile(self.source_path, self.pyc_path) + finally: + os.chmod(self.directory, mode.st_mode) + + def test_bad_coding(self): + bad_coding = os.path.join(os.path.dirname(__file__), + 'tokenizedata', + 'bad_coding2.py') + with support.captured_stderr(): + self.assertIsNone(py_compile.compile(bad_coding, doraise=False)) + self.assertFalse(os.path.exists( + importlib.util.cache_from_source(bad_coding))) + + def test_source_date_epoch(self): + py_compile.compile(self.source_path, self.pyc_path) + self.assertTrue(os.path.exists(self.pyc_path)) + self.assertFalse(os.path.exists(self.cache_path)) + with open(self.pyc_path, 'rb') as fp: + flags = importlib._bootstrap_external._classify_pyc( + fp.read(), 'test', {}) + if os.environ.get('SOURCE_DATE_EPOCH'): + expected_flags = 0b11 + else: + expected_flags = 0b00 + + self.assertEqual(flags, expected_flags) + + @unittest.skipIf(sys.flags.optimize > 0, 'test does not work with -O') + def test_double_dot_no_clobber(self): + # http://bugs.python.org/issue22966 + # py_compile foo.bar.py -> __pycache__/foo.cpython-34.pyc + weird_path = os.path.join(self.directory, 'foo.bar.py') + cache_path = importlib.util.cache_from_source(weird_path) + pyc_path = weird_path + 'c' + head, tail = os.path.split(cache_path) + penultimate_tail = os.path.basename(head) + self.assertEqual( + os.path.join(penultimate_tail, tail), + os.path.join( + '__pycache__', + 'foo.bar.{}.pyc'.format(sys.implementation.cache_tag))) + with open(weird_path, 'w') as file: + file.write('x = 123\n') + py_compile.compile(weird_path) + self.assertTrue(os.path.exists(cache_path)) + self.assertFalse(os.path.exists(pyc_path)) + + def test_optimization_path(self): + # Specifying optimized bytecode should lead to a path reflecting that. + self.assertIn('opt-2', py_compile.compile(self.source_path, optimize=2)) + + def test_invalidation_mode(self): + py_compile.compile( + self.source_path, + invalidation_mode=py_compile.PycInvalidationMode.CHECKED_HASH, + ) + with open(self.cache_path, 'rb') as fp: + flags = importlib._bootstrap_external._classify_pyc( + fp.read(), 'test', {}) + self.assertEqual(flags, 0b11) + py_compile.compile( + self.source_path, + invalidation_mode=py_compile.PycInvalidationMode.UNCHECKED_HASH, + ) + with open(self.cache_path, 'rb') as fp: + flags = importlib._bootstrap_external._classify_pyc( + fp.read(), 'test', {}) + self.assertEqual(flags, 0b1) + + def test_quiet(self): + bad_coding = os.path.join(os.path.dirname(__file__), + 'tokenizedata', + 'bad_coding2.py') + with support.captured_stderr() as stderr: + self.assertIsNone(py_compile.compile(bad_coding, doraise=False, quiet=2)) + self.assertIsNone(py_compile.compile(bad_coding, doraise=True, quiet=2)) + self.assertEqual(stderr.getvalue(), '') + with self.assertRaises(py_compile.PyCompileError): + py_compile.compile(bad_coding, doraise=True, quiet=1) + + def test_utf7_decoded_cr_compiles(self): + with open(self.source_path, 'wb') as file: + file.write(b"#coding=U7+AA0''\n") + + pyc_path = py_compile.compile(self.source_path, self.pyc_path, doraise=True) + self.assertEqual(pyc_path, self.pyc_path) + self.assertTrue(os.path.exists(self.pyc_path)) + + +class PyCompileTestsWithSourceEpoch(PyCompileTestsBase, + unittest.TestCase, + metaclass=SourceDateEpochTestMeta, + source_date_epoch=True): + pass + + +class PyCompileTestsWithoutSourceEpoch(PyCompileTestsBase, + unittest.TestCase, + metaclass=SourceDateEpochTestMeta, + source_date_epoch=False): + pass + + +class PyCompileCLITestCase(unittest.TestCase): + + def setUp(self): + self.directory = tempfile.mkdtemp() + self.source_path = os.path.join(self.directory, '_test.py') + self.cache_path = importlib.util.cache_from_source(self.source_path, + optimization='' if __debug__ else 1) + with open(self.source_path, 'w') as file: + file.write('x = 123\n') + + def tearDown(self): + os_helper.rmtree(self.directory) + + @support.requires_subprocess() + def pycompilecmd(self, *args, **kwargs): + # assert_python_* helpers don't return proc object. We'll just use + # subprocess.run() instead of spawn_python() and its friends to test + # stdin support of the CLI. + opts = '-m' if __debug__ else '-Om' + if args and args[0] == '-' and 'input' in kwargs: + return subprocess.run([sys.executable, opts, 'py_compile', '-'], + input=kwargs['input'].encode(), + capture_output=True) + return script_helper.assert_python_ok(opts, 'py_compile', *args, **kwargs) + + def pycompilecmd_failure(self, *args): + return script_helper.assert_python_failure('-m', 'py_compile', *args) + + def test_stdin(self): + self.assertFalse(os.path.exists(self.cache_path)) + result = self.pycompilecmd('-', input=self.source_path) + self.assertEqual(result.returncode, 0) + self.assertEqual(result.stdout, b'') + self.assertEqual(result.stderr, b'') + self.assertTrue(os.path.exists(self.cache_path)) + + def test_with_files(self): + rc, stdout, stderr = self.pycompilecmd(self.source_path, self.source_path) + self.assertEqual(rc, 0) + self.assertEqual(stdout, b'') + self.assertEqual(stderr, b'') + self.assertTrue(os.path.exists(self.cache_path)) + + def test_bad_syntax(self): + bad_syntax = os.path.join(os.path.dirname(__file__), + 'tokenizedata', + 'badsyntax_3131.py') + rc, stdout, stderr = self.pycompilecmd_failure(bad_syntax) + self.assertEqual(rc, 1) + self.assertEqual(stdout, b'') + self.assertIn(b'SyntaxError', stderr) + + def test_bad_syntax_with_quiet(self): + bad_syntax = os.path.join(os.path.dirname(__file__), + 'tokenizedata', + 'badsyntax_3131.py') + rc, stdout, stderr = self.pycompilecmd_failure('-q', bad_syntax) + self.assertEqual(rc, 1) + self.assertEqual(stdout, b'') + self.assertEqual(stderr, b'') + + def test_file_not_exists(self): + should_not_exists = os.path.join(os.path.dirname(__file__), 'should_not_exists.py') + rc, stdout, stderr = self.pycompilecmd_failure(self.source_path, should_not_exists) + self.assertEqual(rc, 1) + self.assertEqual(stdout, b'') + self.assertIn(b'no such file or directory', stderr.lower()) + + def test_file_not_exists_with_quiet(self): + should_not_exists = os.path.join(os.path.dirname(__file__), 'should_not_exists.py') + rc, stdout, stderr = self.pycompilecmd_failure('-q', self.source_path, should_not_exists) + self.assertEqual(rc, 1) + self.assertEqual(stdout, b'') + self.assertEqual(stderr, b'') + + +if __name__ == "__main__": + unittest.main() From b6e17d2c6fe9f610c3e8a9c686dcefe9d15d333a Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 00:38:44 +0700 Subject: [PATCH 68/84] imp: don't cache .pyc for the frozen importlib bootstrap modules CPython freezes importlib._bootstrap and importlib._bootstrap_external, so their code objects keep the synthetic co_filename for the whole process. gopy loads them from source and was caching a .pyc adjacent to them; on the next import readBytecodeCache ran fixCoFilename and rewrote co_filename to the real disk path. That left the import-machinery frames carrying a real path, so remove_importlib_frames could no longer strip them and the ImportTracebackTests saw extra _bootstrap_external frames. Skip the bytecode cache for these two files, matching CPython where they are never byte-compiled. The source compiler stamps the frozen name on every load. --- imp/writepyc.go | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/imp/writepyc.go b/imp/writepyc.go index ada72b9e..ca5e7ff4 100644 --- a/imp/writepyc.go +++ b/imp/writepyc.go @@ -24,6 +24,20 @@ import ( // CPython: Lib/importlib/_bootstrap_external.py:60 _PYCACHE const pycacheDir = "__pycache__" +// isFrozenBootstrapSource reports whether sourcePath is one of the two +// importlib bootstrap modules CPython freezes (importlib._bootstrap and +// importlib._bootstrap_external). Those are never byte-compiled to a .pyc +// in CPython, so gopy excludes them from the bytecode cache to keep their +// "" co_filename intact. A cached +// .pyc would be rewritten to the real disk path by fixCoFilename, leaving +// the import-machinery frames un-trimmable by remove_importlib_frames. +// +// CPython: Python/pylifecycle.c:1041 init_importlib (frozen modules) +func isFrozenBootstrapSource(sourcePath string) bool { + return strings.HasSuffix(sourcePath, "importlib/_bootstrap.py") || + strings.HasSuffix(sourcePath, "importlib/_bootstrap_external.py") +} + // dontWriteBytecode reports sys.dont_write_bytecode. When True the // source loaders skip the cache write entirely, exactly like CPython's // SourceFileLoader.get_code (the `not sys.dont_write_bytecode` guard). @@ -138,6 +152,19 @@ func cacheFromSource(sourcePath string) string { // CPython: Lib/importlib/_bootstrap_external.py:1129 SourceFileLoader.get_code // CPython: Lib/importlib/_bootstrap_external.py:585 _validate_timestamp_pyc func readBytecodeCache(sourcePath string) (*objects.Code, bool) { + if isFrozenBootstrapSource(sourcePath) { + // CPython freezes importlib._bootstrap[_external] and never loads + // them from a .pyc, so their code objects keep the synthetic + // "" co_filename for the + // life of the process. gopy loads them from source instead; reading + // a cached .pyc would route through fixCoFilename below and rewrite + // that co_filename to the real disk path, leaving the import-machinery + // frames un-trimmable by remove_importlib_frames. Skip the cache so + // the source compiler stamps the frozen name every time. + // + // CPython: Python/import.c:3500 remove_importlib_frames (frozen names) + return nil, false + } dest := cacheFromSource(sourcePath) if dest == "" { return nil, false @@ -212,7 +239,7 @@ func fixCoFilename(code *objects.Code, oldname, newname string) { // CPython: Lib/importlib/_bootstrap_external.py:1167 get_code (cache write) // CPython: Lib/importlib/_bootstrap_external.py:1185 set_data (atomic write) func writeBytecodeCache(sourcePath string, code *objects.Code) { - if dontWriteBytecode() { + if dontWriteBytecode() || isFrozenBootstrapSource(sourcePath) { return } dest := cacheFromSource(sourcePath) From 7b869f224d7a749c5b7fa238e2ddc988a6ba7ca0 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 00:45:01 +0700 Subject: [PATCH 69/84] marshal: raise EOFError on truncated buffers --- marshal/marshal.go | 48 +++++++++++++++++++++++++++++++++++++++- module/marshal/module.go | 6 +++++ 2 files changed, 53 insertions(+), 1 deletion(-) diff --git a/marshal/marshal.go b/marshal/marshal.go index 3d4db315..9813d4e2 100644 --- a/marshal/marshal.go +++ b/marshal/marshal.go @@ -76,6 +76,30 @@ const flagRef = 0x80 // CPython: Python/marshal.c WFERR_UNMARSHALLABLE var ErrUnmarshallable = errors.New("marshal: object cannot be marshaled") +// The three EOF sentinels mirror the EOFError messages CPython's r_object / +// r_byte / r_string raise when the wire data runs out. The marshal module +// surface maps them to EOFError, every other decode error to ValueError. +// +// CPython: Python/marshal.c:833 r_string ("marshal data too short") +// CPython: Python/marshal.c:916 r_byte ("EOF read where not expected") +// CPython: Python/marshal.c:1172 r_object ("EOF read where object expected") +var ( + ErrEOFObjectExpected = errors.New("EOF read where object expected") + ErrEOFNotExpected = errors.New("EOF read where not expected") + ErrDataTooShort = errors.New("marshal data too short") +) + +// IsEOF reports whether err is one of the marshal EOF sentinels (or a raw +// io.EOF / io.ErrUnexpectedEOF that escaped conversion). The module surface +// uses it to choose EOFError over ValueError. +func IsEOF(err error) bool { + return errors.Is(err, ErrEOFObjectExpected) || + errors.Is(err, ErrEOFNotExpected) || + errors.Is(err, ErrDataTooShort) || + errors.Is(err, io.EOF) || + errors.Is(err, io.ErrUnexpectedEOF) +} + // Dump writes v to w in the version-5 wire format. // // CPython: Python/marshal.c PyMarshal_WriteObjectToFile @@ -569,7 +593,16 @@ func (b *byteReader) ReadByte() (byte, error) { } func (d *decoder) readByte() (byte, error) { - return d.r.ReadByte() + b, err := d.r.ReadByte() + if err != nil { + // CPython's r_byte raises EOFError "EOF read where not expected". + // CPython: Python/marshal.c:916 r_byte + if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) { + return 0, ErrEOFNotExpected + } + return 0, err + } + return b, nil } func (d *decoder) readN(n int) ([]byte, error) { @@ -577,6 +610,12 @@ func (d *decoder) readN(n int) ([]byte, error) { for i := 0; i < n; i++ { b, err := d.r.ReadByte() if err != nil { + // CPython reads byte strings through r_string, which raises + // EOFError "marshal data too short" when the buffer underruns. + // CPython: Python/marshal.c:833 r_string + if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) { + return nil, ErrDataTooShort + } return nil, err } out[i] = b @@ -607,6 +646,13 @@ func (d *decoder) readInt64() (int64, error) { func (d *decoder) read() (any, error) { tag, err := d.readByte() if err != nil { + // r_object reads the type code first; an EOF here is reported as + // "EOF read where object expected", distinct from r_byte's own + // "EOF read where not expected" used mid-object. + // CPython: Python/marshal.c:1172 r_object + if errors.Is(err, ErrEOFNotExpected) || errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) { + return nil, ErrEOFObjectExpected + } return nil, err } diff --git a/module/marshal/module.go b/module/marshal/module.go index 92ae5588..16af5ce4 100644 --- a/module/marshal/module.go +++ b/module/marshal/module.go @@ -95,6 +95,12 @@ func loads(args []objects.Object, kwargs map[string]objects.Object) (objects.Obj } val, err := marshal.Load(bytes.NewReader(src)) if err != nil { + // A truncated or empty buffer surfaces as EOFError, mirroring + // r_object/r_byte/r_string; any other decode failure is a ValueError. + // CPython: Python/marshal.c:1922 marshal_loads_impl + if marshal.IsEOF(err) { + return nil, fmt.Errorf("EOFError: %w", err) + } return nil, fmt.Errorf("ValueError: %w", err) } return wrap(val), nil From cd10d1a1beea24c2aec285aaf3f12e2b9d1ab976 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 00:52:52 +0700 Subject: [PATCH 70/84] frozen: register full test module table with alias origins --- imp/frozen.go | 34 +++++++++++++++++++++++++++------- imp/frozen_bootstrap.go | 17 ++++++++++++----- imp/frozen_test_modules.go | 27 ++++++++++++++++++++++++--- module/_imp/module.go | 7 ++++++- 4 files changed, 69 insertions(+), 16 deletions(-) diff --git a/imp/frozen.go b/imp/frozen.go index 282e719c..add356b4 100644 --- a/imp/frozen.go +++ b/imp/frozen.go @@ -39,6 +39,17 @@ type FrozenModule struct { // // CPython: Python/frozen.c _PyImport_FrozenAliases OrigName string + // OrigNone marks an alias entry whose alias target is NULL, so + // find_frozen reports origname None (e.g. __hello_only__). It + // overrides OrigName/Name when reporting the origin. + // + // CPython: Python/frozen.c:123 aliases {"__hello_only__", NULL} + OrigNone bool + // Embedded marks a genuinely frozen entry that always yields a code + // object, even when Source is empty (e.g. the empty __phello__.ham + // package __init__). CPython freezes these as real, non-empty + // marshaled code; gopy compiles the (possibly empty) Source on demand. + Embedded bool // IsPackage is true when the frozen module is a package (has __path__). IsPackage bool @@ -64,7 +75,7 @@ func (m *FrozenModule) CodeObject() (*objects.Code, error) { if m.Code != nil { return m.Code, nil } - if m.Source == "" { + if m.Source == "" && !m.Embedded { return nil, nil } m.compileMu.Lock() @@ -85,16 +96,25 @@ func (m *FrozenModule) CodeObject() (*objects.Code, error) { // pre-embedded or compilable from Source. Placeholder entries (the // importlib bootstrap stubs, which gopy loads from disk) return false. func (m *FrozenModule) HasCode() bool { - return m.Code != nil || m.Source != "" + return m.Code != nil || m.Source != "" || m.Embedded } -// Origin returns the name find_frozen reports for the entry: OrigName -// when set, otherwise the entry's own Name. -func (m *FrozenModule) Origin() string { +// Origin returns the name find_frozen reports for the entry and whether +// that origin is None. CPython seeds origname with the entry's own name, +// then resolve_module_alias overrides it for alias entries (possibly to +// NULL). _imp.find_frozen reports None when the resolved origname is +// NULL or empty. +// +// CPython: Python/import.c:3052 find_frozen (origname seed + alias) +// CPython: Python/import.c:4533 _imp_find_frozen_impl (NULL/empty -> None) +func (m *FrozenModule) Origin() (string, bool) { + if m.OrigNone { + return "", true + } if m.OrigName != "" { - return m.OrigName + return m.OrigName, false } - return m.Name + return m.Name, false } var ( diff --git a/imp/frozen_bootstrap.go b/imp/frozen_bootstrap.go index 0990133c..a92deb46 100644 --- a/imp/frozen_bootstrap.go +++ b/imp/frozen_bootstrap.go @@ -11,19 +11,26 @@ package imp func init() { - // _frozen_importlib — Lib/importlib/_bootstrap.py - // CPython: Python/frozen.c:L56 + // _frozen_importlib — Lib/importlib/_bootstrap.py. gopy loads the + // bootstrap from disk at startup and caches it in sys.modules, so this + // frozen code is never executed; it exists so FrozenImporter.find_spec + // reports the module with origname "importlib._bootstrap", matching + // the build-time frozen alias. + // + // CPython: Python/frozen.c:70 bootstrap_modules / :116 aliases RegisterFrozen(&FrozenModule{ Name: "_frozen_importlib", - Code: nil, + Embedded: true, + OrigName: "importlib._bootstrap", IsPackage: false, }) // _frozen_importlib_external — Lib/importlib/_bootstrap_external.py - // CPython: Python/frozen.c:L63 + // CPython: Python/frozen.c:71 bootstrap_modules / :117 aliases RegisterFrozen(&FrozenModule{ Name: "_frozen_importlib_external", - Code: nil, + Embedded: true, + OrigName: "importlib._bootstrap_external", IsPackage: false, }) diff --git a/imp/frozen_test_modules.go b/imp/frozen_test_modules.go index abdd9be2..2f4c0dac 100644 --- a/imp/frozen_test_modules.go +++ b/imp/frozen_test_modules.go @@ -46,20 +46,41 @@ if __name__ == '__main__': main() ` +// frozenOnlySource is the body frozen as __hello_only__. CPython freezes +// it from Tools/freeze/flag.py, which has no on-disk stdlib copy, so the +// alias table records a NULL origin (loader_state.filename stays None). +// +// CPython: Tools/freeze/flag.py +const frozenOnlySource = `initialized = True +print("Hello world!") +` + func init() { // __hello__ and its aliases share one source module; the alias // entries report __hello__ as their origin so FrozenImporter resolves // the on-disk __file__ against Lib/__hello__.py. // - // CPython: Python/frozen.c:98 / _PyImport_FrozenAliases + // CPython: Python/frozen.c:96 test_modules / :114 aliases RegisterFrozen(&FrozenModule{Name: "__hello__", Source: frozenHelloSource}) RegisterFrozen(&FrozenModule{Name: "__hello_alias__", Source: frozenHelloSource, OrigName: "__hello__"}) RegisterFrozen(&FrozenModule{Name: "__phello_alias__", Source: frozenHelloSource, OrigName: "__hello__", IsPackage: true}) RegisterFrozen(&FrozenModule{Name: "__phello_alias__.spam", Source: frozenHelloSource, OrigName: "__hello__"}) - // __phello__ is a real frozen package with a frozen submodule (spam). + // __phello__ is a real frozen package. Its __init__ alias reports + // the synthetic "<__phello__" origin (the leading "<" tells + // FrozenImporter._resolve_filename to map it to the package __init__). // - // CPython: Python/frozen.c:102 + // CPython: Python/frozen.c:100-107 test_modules / :121 aliases RegisterFrozen(&FrozenModule{Name: "__phello__", Source: frozenPhelloSource, IsPackage: true}) + RegisterFrozen(&FrozenModule{Name: "__phello__.__init__", Source: frozenPhelloSource, OrigName: "<__phello__"}) + RegisterFrozen(&FrozenModule{Name: "__phello__.ham", Embedded: true, IsPackage: true}) + RegisterFrozen(&FrozenModule{Name: "__phello__.ham.__init__", Embedded: true, OrigName: "<__phello__.ham"}) + RegisterFrozen(&FrozenModule{Name: "__phello__.ham.eggs", Embedded: true}) RegisterFrozen(&FrozenModule{Name: "__phello__.spam", Source: frozenPhelloSource}) + + // __hello_only__ is frozen-only (no stdlib source), so its alias + // origin is NULL and find_frozen reports origname None. + // + // CPython: Python/frozen.c:108 test_modules / :123 aliases + RegisterFrozen(&FrozenModule{Name: "__hello_only__", Source: frozenOnlySource, OrigNone: true}) } diff --git a/module/_imp/module.go b/module/_imp/module.go index 63a5a50d..41ed44e6 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -283,10 +283,15 @@ func findFrozen(args []objects.Object, _ map[string]objects.Object) (objects.Obj if !ok || !fm.HasCode() { return objects.None(), nil } + origname, isNone := fm.Origin() + var origObj objects.Object = objects.None() + if !isNone { + origObj = objects.NewStr(origname) + } return objects.NewTuple([]objects.Object{ objects.None(), objects.NewBool(fm.IsPackage), - objects.NewStr(fm.Origin()), + origObj, }), nil } From 6982b4c9b17e13deec50db3524e65f8442e156cd Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 00:59:13 +0700 Subject: [PATCH 71/84] os: accept PathLike in symlink/readlink/link via path_converter --- module/os/posix_extra.go | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/module/os/posix_extra.go b/module/os/posix_extra.go index 2f5e2962..3d924de9 100644 --- a/module/os/posix_extra.go +++ b/module/os/posix_extra.go @@ -77,15 +77,15 @@ func osSymlink(args []objects.Object, _ map[string]objects.Object) (objects.Obje if len(args) < 2 { return nil, fmt.Errorf("TypeError: symlink() requires src and dst") } - src, ok := args[0].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: symlink() src must be str") + src, err := pathStringArg(args[0], "symlink") + if err != nil { + return nil, err } - dst, ok := args[1].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: symlink() dst must be str") + dst, err := pathStringArg(args[1], "symlink") + if err != nil { + return nil, err } - if err := goos.Symlink(src.Value(), dst.Value()); err != nil { + if err := goos.Symlink(src, dst); err != nil { return nil, fmt.Errorf("OSError: %w", err) } return objects.None(), nil @@ -98,11 +98,11 @@ func osReadlink(args []objects.Object, _ map[string]objects.Object) (objects.Obj if len(args) < 1 { return nil, fmt.Errorf("TypeError: readlink() missing path") } - path, ok := args[0].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: readlink() path must be str") + path, err := pathStringArg(args[0], "readlink") + if err != nil { + return nil, err } - target, err := goos.Readlink(path.Value()) + target, err := goos.Readlink(path) if err != nil { return nil, fmt.Errorf("OSError: %w", err) } @@ -116,15 +116,15 @@ func osLink(args []objects.Object, _ map[string]objects.Object) (objects.Object, if len(args) < 2 { return nil, fmt.Errorf("TypeError: link() requires src and dst") } - src, ok := args[0].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: link() src must be str") + src, err := pathStringArg(args[0], "link") + if err != nil { + return nil, err } - dst, ok := args[1].(*objects.Unicode) - if !ok { - return nil, fmt.Errorf("TypeError: link() dst must be str") + dst, err := pathStringArg(args[1], "link") + if err != nil { + return nil, err } - if err := goos.Link(src.Value(), dst.Value()); err != nil { + if err := goos.Link(src, dst); err != nil { return nil, fmt.Errorf("OSError: %w", err) } return objects.None(), nil From ce64822e6f8a61cf36461f04b87c2eba82b6d82d Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 09:47:57 +0700 Subject: [PATCH 72/84] os: fstat/isatty via fstat(2) instead of borrowing the fd in an os.File os.fstat and os.isatty borrowed the descriptor with os.NewFile, cleared the finalizer with runtime.SetFinalizer(f, nil), and called Stat. That clear is a no-op: os.NewFile arms the close finalizer on the inner unexported file handle, not on the *os.File we hold, so a later GC of the throwaway wrapper closed the live descriptor. On macOS the runtime had also registered that fd with the kqueue netpoller, so closing it out from under the runtime crashed with 'kevent failed with 9 / netpoll failed'; elsewhere it surfaced as a spurious EBADF on an unrelated file that had since reused the integer. test_import's threaded settrace path hit this reliably and took the whole interpreter down. fstat the descriptor directly through syscall.Fstat on POSIX and build the stat_result from the syscall.Stat_t, so no finalizer-bearing wrapper is ever created. Windows and the fallback target keep the os.File path, where the kqueue hazard does not apply. isatty now routes through the same helper and tests the char-device bit on the returned mode. Also restore the clearGoFinalizer call on io.open's plain-path branch, which was the one open path missing it. --- module/io/module.go | 1 + module/os/module.go | 20 +++++++------------- module/os/posix_extra.go | 38 +++++++++++++++++--------------------- module/os/stat_darwin.go | 19 +++++++++++++++++++ module/os/stat_linux.go | 19 +++++++++++++++++++ module/os/stat_other.go | 20 ++++++++++++++++++++ module/os/stat_windows.go | 21 +++++++++++++++++++++ objects/file.go | 27 ++++++++++++++++++++++++++- 8 files changed, 130 insertions(+), 35 deletions(-) diff --git a/module/io/module.go b/module/io/module.go index 7b5e7fae..6ac77ebe 100644 --- a/module/io/module.go +++ b/module/io/module.go @@ -469,6 +469,7 @@ func ioOpen(a *ioOpenArgs) (objects.Object, error) { Err: syscall.EISDIR, }) } + clearGoFinalizer(f) raw = NewFileIO(f, a.file, rawMode, readable, writable) } diff --git a/module/os/module.go b/module/os/module.go index d0c81649..0d3b638a 100644 --- a/module/os/module.go +++ b/module/os/module.go @@ -1402,9 +1402,12 @@ func osLstat(args []objects.Object, _ map[string]objects.Object) (objects.Object return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), int64(uid), int64(gid), info.Size(), atime, mtime, ctime, blksize, blocks, rdev), nil } -// osFstat returns the stat of an open file descriptor. -// The underlying fd is not closed; runtime.SetFinalizer is cleared on -// the temporary os.File wrapper so the GC never closes it. +// osFstat returns the stat of an open file descriptor. The work is +// delegated to the platform fstatResult helper, which calls fstat(2) +// directly through syscall rather than borrowing the fd in a temporary +// os.File. An os.File wrapper arms a finalizer on its inner file handle +// that runtime.SetFinalizer on the outer struct cannot clear, so a GC of +// the wrapper would close the live descriptor out from under its owner. // // CPython: Modules/posixmodule.c:3399 os_fstat_impl func osFstat(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { @@ -1416,16 +1419,7 @@ func osFstat(args []objects.Object, _ map[string]objects.Object) (objects.Object return nil, fmt.Errorf("TypeError: an integer is required") } fdVal, _ := fdObj.Int64() - f := goos.NewFile(uintptr(fdVal), "") - runtime.SetFinalizer(f, nil) - info, err := f.Stat() - if err != nil { - return nil, fmt.Errorf("OSError: %w", err) - } - ino, dev, nlink, uid, gid, atime, ctime := statSysFields(info) - mtime := info.ModTime().UnixNano() - blksize, blocks, rdev := statBlockFields(info) - return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), int64(uid), int64(gid), info.Size(), atime, mtime, ctime, blksize, blocks, rdev), nil + return fstatResult(fdVal) } // osReplace atomically renames src to dst, replacing dst if it exists. diff --git a/module/os/posix_extra.go b/module/os/posix_extra.go index 3d924de9..cef9e1a1 100644 --- a/module/os/posix_extra.go +++ b/module/os/posix_extra.go @@ -182,12 +182,17 @@ func osCPUCount(args []objects.Object, _ map[string]objects.Object) (objects.Obj return objects.NewInt(int64(n)), nil } -// osIsatty returns True if fd is a tty. The implementation Stats the -// fd through the goos package and tests the char-device bit, which -// matches what `isatty(3)` reports for the common cases _colorize -// cares about. +// osIsatty returns True if fd is a tty. It fstats the descriptor and +// tests the char-device type bit, which matches what `isatty(3)` reports +// for the common cases _colorize cares about. The stat goes through the +// platform fstatResult helper, which calls fstat(2) directly rather than +// borrowing the fd in a temporary os.File. A borrowed os.File arms a +// finalizer on its inner handle that runtime.SetFinalizer on the outer +// struct cannot clear, so a GC of the wrapper would close a descriptor we +// do not own and unrelated writes would later fail with EBADF. // -// CPython: Modules/posixmodule.c:11947 os_isatty_impl +// CPython: Modules/posixmodule.c:11947 os_isatty_impl borrows the fd +// and never closes it. func osIsatty(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { if len(args) < 1 { return nil, fmt.Errorf("TypeError: isatty() missing required argument: 'fd'") @@ -197,27 +202,18 @@ func osIsatty(args []objects.Object, _ map[string]objects.Object) (objects.Objec return nil, fmt.Errorf("TypeError: an integer is required") } fdVal, _ := fdObj.Int64() - // The fd is owned by the caller (a live file, socket, or one of the - // std streams); this wrapper only borrows it to Stat. Clear Go's - // runtime finalizer so a later GC of the throwaway *os.File never - // closes a descriptor we do not own. Without this, a GC mid-run - // closes a borrowed fd and unrelated writes fail with EBADF. - // - // CPython: Modules/posixmodule.c:11947 os_isatty_impl borrows the fd - // and never closes it. - f := goos.NewFile(uintptr(fdVal), "") - if f == nil { - return objects.NewBool(false), nil - } - runtime.SetFinalizer(f, nil) - info, err := f.Stat() + st, err := fstatResult(fdVal) if err != nil { // CPython os.isatty returns False on any error rather than - // raising; a Stat failure here means the fd is not a real + // raising; a stat failure here means the fd is not a real // device, which is exactly what callers want to know. return objects.NewBool(false), nil //nolint:nilerr // CPython os.isatty parity } - return objects.NewBool((info.Mode() & goos.ModeCharDevice) != 0), nil + // st_mode is the first stat_result slot. S_IFMT masks the file-type + // nibble; S_IFCHR marks a character device. + const sIFMT, sIFCHR = 0o170000, 0o020000 + mode, _ := st.Items()[0].(*objects.Int).Int64() + return objects.NewBool(mode&sIFMT == sIFCHR), nil } // osFsdecode decodes filename from the filesystem encoding (utf-8 on diff --git a/module/os/stat_darwin.go b/module/os/stat_darwin.go index 35c5798c..9bdcf3f2 100644 --- a/module/os/stat_darwin.go +++ b/module/os/stat_darwin.go @@ -63,6 +63,25 @@ func statBlockFields(info goos.FileInfo) (blksize, blocks, rdev int64) { return } +// fstatResult stats an open descriptor via fstat(2) and assembles the +// stat_result directly from the syscall.Stat_t. It never wraps the fd in +// an os.File, so no finalizer is armed that could close the live +// descriptor when the wrapper is garbage-collected. +// +// CPython: Modules/posixmodule.c:3399 os_fstat_impl +func fstatResult(fdVal int64) (*objects.StructSeq, error) { + var st syscall.Stat_t + if err := syscall.Fstat(int(fdVal), &st); err != nil { + return nil, fmt.Errorf("OSError: %w", err) + } + atime := st.Atimespec.Sec*1_000_000_000 + st.Atimespec.Nsec + mtime := st.Mtimespec.Sec*1_000_000_000 + st.Mtimespec.Nsec + ctime := st.Ctimespec.Sec*1_000_000_000 + st.Ctimespec.Nsec + return newStatResult(int64(st.Mode), int64(st.Ino), int64(st.Dev), int64(st.Nlink), + int64(st.Uid), int64(st.Gid), st.Size, atime, mtime, ctime, + int64(st.Blksize), st.Blocks, int64(st.Rdev)), nil +} + // getuid returns the real user ID of the calling process. // CPython: Modules/posixmodule.c:9635 os_getuid_impl func getuid(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { diff --git a/module/os/stat_linux.go b/module/os/stat_linux.go index 691bea18..851bedcb 100644 --- a/module/os/stat_linux.go +++ b/module/os/stat_linux.go @@ -60,6 +60,25 @@ func statBlockFields(info goos.FileInfo) (blksize, blocks, rdev int64) { return } +// fstatResult stats an open descriptor via fstat(2) and assembles the +// stat_result directly from the syscall.Stat_t. It never wraps the fd in +// an os.File, so no finalizer is armed that could close the live +// descriptor when the wrapper is garbage-collected. +// +// CPython: Modules/posixmodule.c:3399 os_fstat_impl +func fstatResult(fdVal int64) (*objects.StructSeq, error) { + var st syscall.Stat_t + if err := syscall.Fstat(int(fdVal), &st); err != nil { + return nil, fmt.Errorf("OSError: %w", err) + } + atime := st.Atim.Sec*1_000_000_000 + int64(st.Atim.Nsec) + mtime := st.Mtim.Sec*1_000_000_000 + int64(st.Mtim.Nsec) + ctime := st.Ctim.Sec*1_000_000_000 + int64(st.Ctim.Nsec) + return newStatResult(int64(st.Mode), int64(st.Ino), int64(st.Dev), int64(st.Nlink), + int64(st.Uid), int64(st.Gid), st.Size, atime, mtime, ctime, + int64(st.Blksize), int64(st.Blocks), int64(st.Rdev)), nil +} + // getuid returns the real user ID of the calling process. // CPython: Modules/posixmodule.c:9635 os_getuid_impl func getuid(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { diff --git a/module/os/stat_other.go b/module/os/stat_other.go index 5d340924..66934d41 100644 --- a/module/os/stat_other.go +++ b/module/os/stat_other.go @@ -7,10 +7,30 @@ package os import ( "fmt" goos "os" + "runtime" "github.com/tamnd/gopy/objects" ) +// fstatResult stats an open descriptor through a temporary os.File on +// platforms without a syscall.Stat_t. SetFinalizer is cleared on a +// best-effort basis; these fallback targets do not run the kqueue +// netpoller that makes the borrowed-fd close fatal on Darwin. +// +// CPython: Modules/posixmodule.c:3399 os_fstat_impl +func fstatResult(fdVal int64) (*objects.StructSeq, error) { + f := goos.NewFile(uintptr(fdVal), "") + runtime.SetFinalizer(f, nil) + info, err := f.Stat() + if err != nil { + return nil, fmt.Errorf("OSError: %w", err) + } + ino, dev, nlink, uid, gid, atime, ctime := statSysFields(info) + mtime := info.ModTime().UnixNano() + blksize, blocks, rdev := statBlockFields(info) + return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), int64(uid), int64(gid), info.Size(), atime, mtime, ctime, blksize, blocks, rdev), nil +} + // statSysFields returns minimal values on unsupported platforms. // CPython: Modules/posixmodule.c:3238 os_stat_impl func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, atime, ctime int64) { diff --git a/module/os/stat_windows.go b/module/os/stat_windows.go index f115ea2d..18877ff4 100644 --- a/module/os/stat_windows.go +++ b/module/os/stat_windows.go @@ -5,12 +5,33 @@ package os import ( + "fmt" goos "os" + "runtime" "syscall" "github.com/tamnd/gopy/objects" ) +// fstatResult stats an open descriptor. Windows resolves the fd through a +// temporary os.File whose Stat goes via GetFileInformationByHandle; the +// netpoll-vs-finalizer hazard that motivates the POSIX raw-syscall path +// does not apply to Windows handles, so the wrapper is reused here. +// +// CPython: Modules/posixmodule.c:3399 os_fstat_impl +func fstatResult(fdVal int64) (*objects.StructSeq, error) { + f := goos.NewFile(uintptr(fdVal), "") + runtime.SetFinalizer(f, nil) + info, err := f.Stat() + if err != nil { + return nil, fmt.Errorf("OSError: %w", err) + } + ino, dev, nlink, uid, gid, atime, ctime := statSysFields(info) + mtime := info.ModTime().UnixNano() + blksize, blocks, rdev := statBlockFields(info) + return newStatResult(statMode(info), int64(ino), int64(dev), int64(nlink), int64(uid), int64(gid), info.Size(), atime, mtime, ctime, blksize, blocks, rdev), nil +} + // statSysFields extracts platform fields from a Windows FileInfo's // Win32FileAttributeData. Windows reports CreationTime / LastAccessTime // / LastWriteTime as FILETIME (100-ns intervals since 1601-01-01); we diff --git a/objects/file.go b/objects/file.go index add0fbbe..4f8a6840 100644 --- a/objects/file.go +++ b/objects/file.go @@ -51,6 +51,16 @@ type File struct { f *os.File rd *bufio.Reader wr io.Writer + + // noCloseFd marks a borrowed descriptor (the standard streams wrap + // os.Stdout/os.Stderr or an inherited pipe). fileno() still reports + // f's fd, but Close() must not close it: tearing down the sys.stdout + // wrapper, or letting a transient wrapper be collected, must leave the + // process's real fd 1/2 open. Mirrors CPython opening the std streams + // with closefd=False. + // + // CPython: Modules/_io/fileio.c:399 _io_FileIO___init___impl (closefd) + noCloseFd bool } // FileType is the type singleton for File. CPython exposes three or @@ -115,6 +125,21 @@ func NewWriterFile(w io.Writer, name, mode string) *File { errors: "strict", wr: w, } + // A caller-supplied writer that is really an *os.File (the normal CLI + // case, where sys.stdout/stderr wrap os.Stdout/os.Stderr, and the + // subprocess case, where they wrap an inherited pipe fd) keeps a live + // descriptor. Record it so fileno() returns the real fd, matching + // CPython's fd-backed standard streams. Writes still pass straight + // through w (no bufio layer) so output ordering is unchanged; only a + // non-fd writer such as a test bytes.Buffer leaves f nil and makes + // fileno() raise io.UnsupportedOperation, as CPython does for a + // stream with no underlying descriptor. + // + // CPython: Python/sysmodule.c:3795 sys_init_streams (fd-backed FileIO) + if osf, ok := w.(*os.File); ok { + fi.f = osf + fi.noCloseFd = true + } fi.init(FileType) return fi } @@ -277,7 +302,7 @@ func (fi *File) Close() error { firstErr = ioErr(err) } } - if fi.f != nil { + if fi.f != nil && !fi.noCloseFd { if err := fi.f.Close(); err != nil && firstErr == nil { firstErr = ioErr(err) } From efaf834722938efbaecfaa0e2d6136b9ed37b598 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 09:48:06 +0700 Subject: [PATCH 73/84] _testcapi: run_in_subinterp runners + builtins.RunInFreshNamespace test_import's subinterpreter tests call _testcapi.run_in_subinterp and _testinternalcapi.run_in_subinterp_with_config to exec a code string in a fresh interpreter and report the exit status. gopy has no separate interpreter state, so these run the source in a fresh module namespace via builtins.RunInFreshNamespace and return 0 on success / non-zero on an uncaught exception, which is the contract the tests check. --- builtins/eval.go | 20 ++++++++++++++++++++ module/_testcapi/module.go | 21 +++++++++++++++++++++ module/_testinternalcapi/module.go | 25 +++++++++++++++++++++++++ 3 files changed, 66 insertions(+) diff --git a/builtins/eval.go b/builtins/eval.go index 7e23c1dd..d6c28351 100644 --- a/builtins/eval.go +++ b/builtins/eval.go @@ -329,3 +329,23 @@ func runCode(code *objects.Code, globals, locals, closure objects.Object) (objec } return currentEvaluator(code, globals, locals, closure) } + +// RunInFreshNamespace compiles and runs source in a brand-new __main__ +// namespace and returns PyRun_SimpleStringFlags's result code: 0 when the +// code runs to completion, -1 when it raises. It backs the subinterpreter +// test entries (_testcapi.run_in_subinterp and +// _testinternalcapi.run_in_subinterp_with_config). Every gopy extension is +// a Go builtin compiled into the runtime (multi-phase by construction), so +// importing one inside a subinterpreter behaves exactly like a fresh- +// namespace exec in the current process; the only observable result the +// callers read is the integer status. +// +// CPython: Python/pythonrun.c:592 PyRun_SimpleStringFlags +func RunInFreshNamespace(source string) int { + ns := objects.NewDict() + _ = ns.SetItem(objects.NewStr("__name__"), objects.NewStr("__main__")) + if _, err := Exec([]objects.Object{objects.NewStr(source), ns}, nil); err != nil { + return -1 + } + return 0 +} diff --git a/module/_testcapi/module.go b/module/_testcapi/module.go index d6a24cb5..15305030 100644 --- a/module/_testcapi/module.go +++ b/module/_testcapi/module.go @@ -17,6 +17,7 @@ import ( "math" "math/big" + "github.com/tamnd/gopy/builtins" "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/objects" ) @@ -243,6 +244,7 @@ func buildModule() (*objects.Module, error) { {"config_get", configGet}, {"config_getint", configGetint}, {"config_names", configNames}, + {"run_in_subinterp", runInSubinterp}, } for _, w := range wrappers { if err := d.SetItem(objects.NewStr(w.name), objects.NewBuiltinFunction(w.name, w.fn)); err != nil { @@ -315,6 +317,25 @@ func buildModule() (*objects.Module, error) { return m, nil } +// runInSubinterp ports _testcapi.run_in_subinterp(code). CPython creates a +// fresh subinterpreter with Py_NewInterpreter, runs code through +// PyRun_SimpleStringFlags, ends the interpreter, and returns the status. +// gopy has no single-phase C extensions to isolate, so the faithful +// behaviour is a fresh-namespace exec returning the PyRun_SimpleString +// status code. +// +// CPython: Modules/_testcapimodule.c:1969 run_in_subinterp +func runInSubinterp(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 1 { + return nil, fmt.Errorf("TypeError: run_in_subinterp() takes exactly one argument (%d given)", len(args)) + } + code, ok := args[0].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: run_in_subinterp() argument must be str, not %s", args[0].Type().Name) + } + return objects.NewInt(int64(builtins.RunInFreshNamespace(code.Value()))), nil +} + // setNomemory ports _testcapi.set_nomemory(start[, stop]). It arms the // allocation-fault injector so the allocation request at ordinal start // (counting from the call) begins failing, continuing until ordinal stop; diff --git a/module/_testinternalcapi/module.go b/module/_testinternalcapi/module.go index 3d1fd187..4e47ef5d 100644 --- a/module/_testinternalcapi/module.go +++ b/module/_testinternalcapi/module.go @@ -11,6 +11,7 @@ package testinternalcapi import ( "fmt" + "github.com/tamnd/gopy/builtins" "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/module/sys" "github.com/tamnd/gopy/objects" @@ -33,6 +34,7 @@ func buildModule() (*objects.Module, error) { {"get_static_builtin_types", getStaticBuiltinTypes}, {"identify_type_slot_wrappers", identifyTypeSlotWrappers}, {"get_recursion_depth", getRecursionDepth}, + {"run_in_subinterp_with_config", runInSubinterpWithConfig}, } for _, f := range fns { if err := d.SetItem(objects.NewStr(f.name), objects.NewBuiltinFunction(f.name, f.fn)); err != nil { @@ -66,6 +68,29 @@ func buildModule() (*objects.Module, error) { return m, nil } +// runInSubinterpWithConfig ports run_in_subinterp_with_config(code, config, +// xi=False). CPython spins up a fresh PyInterpreterState configured by the +// PyInterpreterConfig the test built, runs the code with +// PyRun_SimpleStringFlags, tears the interpreter down, and returns that +// status. gopy compiles every extension into the runtime as a Go builtin +// (multi-phase by construction), so the config's isolation and +// check_multi_interp_extensions fields never reject an import: a faithful +// run is a fresh-namespace exec whose only observable output is the +// PyRun_SimpleString status code. The config object is accepted and +// ignored. +// +// CPython: Modules/_testinternalcapi.c:1816 run_in_subinterp_with_config +func runInSubinterpWithConfig(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) < 1 { + return nil, fmt.Errorf("TypeError: run_in_subinterp_with_config() missing required argument 'code' (pos 1)") + } + code, ok := args[0].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: run_in_subinterp_with_config() argument 'code' must be str, not %s", args[0].Type().Name) + } + return objects.NewInt(int64(builtins.RunInFreshNamespace(code.Value()))), nil +} + // getRecursionDepth returns the Python recursion depth of the caller, // matching tstate->py_recursion_limit - tstate->py_recursion_remaining. // gopy tracks depth by the active interpreter-frame chain, so the count From 063355168d2fdc147ee75e6deb34741fbf1712d0 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 09:49:02 +0700 Subject: [PATCH 74/84] spec 1731: record test_import threaded-crash fix in the checklist --- website/docs/specs/1700/1731_modules_imports_panel.md | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md index 11be8fea..024b30ca 100644 --- a/website/docs/specs/1700/1731_modules_imports_panel.md +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -107,6 +107,7 @@ CPython 3.14.5 (counts and `-v` lists). - [x] `test_module/` green (39 tests) - [x] P3: frozen `__hello__`/`__phello__` + aliases, frozen override, `sys._stdlib_dir` — `test_frozen` green (3/3) - [ ] P4: `test_runpy` package-init exception path -- [ ] P5: re-audit `test_import/`, `test_importlib/`, `test_module/` +- [x] P5: `test_import/` runs all 118 tests without the threaded crash — `os.fstat`/`os.isatty` no longer borrow the fd in a finalizer-bearing `os.File`; remaining 5 errors are the `_testmultiphase`/`_testsinglephase` C-extension subinterpreter tests (P7) +- [ ] P5: re-audit `test_importlib/`, `test_module/` - [ ] P7: live importlib finders on `sys.meta_path` + `_imp` C functions (architectural) - [ ] P6: `test__interpreters` / `test__interpchannels` parity with CPython skip/run From 56e51b97b0f914bff414f041bfe49241305da6b5 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 09:55:53 +0700 Subject: [PATCH 75/84] vm: fix currentImporter test call arity and a gocritic empty-string check --- vm/builtins_hook_test.go | 2 +- vm/import_level.go | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/vm/builtins_hook_test.go b/vm/builtins_hook_test.go index 1e60b009..32d66c6c 100644 --- a/vm/builtins_hook_test.go +++ b/vm/builtins_hook_test.go @@ -82,7 +82,7 @@ func TestCurrentImporterRoutesThroughInittab(t *testing.T) { } defer imp.RemoveModule(name) - got, err := currentImporter(name, "", 0, nil) + got, err := currentImporter(name, "", 0, nil, nil) if err != nil { t.Fatalf("currentImporter: %v", err) } diff --git a/vm/import_level.go b/vm/import_level.go index 9566da4b..36c96137 100644 --- a/vm/import_level.go +++ b/vm/import_level.go @@ -110,7 +110,7 @@ func importModuleLevelObject(name string, globals objects.Object, fromlist objec // // CPython: Python/import.c:3887 (!has_from branch) func headSelection(name, packageStr string, level int, module objects.Object) (objects.Object, bool, error) { - if level != 0 && len(name) == 0 { + if level != 0 && name == "" { // CPython: Python/import.c:3895 (elif !name: final_mod = mod). return module, true, nil } From 59489d1121275ee2c49ff1fbdb8178f22888fa41 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 10:09:09 +0700 Subject: [PATCH 76/84] io: actually disarm the os.File close finalizer on borrowed fds os.NewFile/os.OpenFile arm the close finalizer on the unexported inner *os.file, so SetFinalizer(f, nil) on the outer handle never disarmed it. A leaked borrowed-fd wrapper (subprocess pipes, fdopen) would then close a descriptor whose number had already been reused, surfacing as a spurious 'bad file descriptor' on an unrelated write. test_import's test_module_with_large_stack hit this during its GC-heavy write loop. Reach the inner pointer and clear the finalizer there, behind a shared objects.ClearOSFileFinalizer, and route the io and _posixsubprocess borrows through it. Drop a dead charmapDecode, refactor buildSpec under the complexity gate, and fix the stale fork_exec test that expected a tuple where CPython returns a plain pid. --- builtins/compile.go | 3 +- imp/pathfinder.go | 134 ++++++++++++++----------- module/_posixsubprocess/module.go | 12 +-- module/_posixsubprocess/module_test.go | 70 ++++++------- module/io/codecs.go | 16 --- module/io/fileio.go | 11 +- objects/file.go | 21 ++++ 7 files changed, 141 insertions(+), 126 deletions(-) diff --git a/builtins/compile.go b/builtins/compile.go index 90114ae4..2388516c 100644 --- a/builtins/compile.go +++ b/builtins/compile.go @@ -156,7 +156,8 @@ func parseCompileArgs(args []objects.Object, kwargs map[string]objects.Object) ( // loaders pass a pathlib.Path here, so a bare str check is too strict. // // CPython: Python/bltinmodule.c builtin_compile (filename: object, -// PyUnicode_FSDecoder) and Objects/unicodeobject.c PyOS_FSPath +// +// PyUnicode_FSDecoder) and Objects/unicodeobject.c PyOS_FSPath func compileFilenameArg(o objects.Object) (string, error) { switch v := o.(type) { case *objects.Unicode: diff --git a/imp/pathfinder.go b/imp/pathfinder.go index 869246bd..e5d5ff48 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -1039,68 +1039,86 @@ func applySpec(util *objects.Module, p pendingSpec) { // buildSpec calls the appropriate importlib.util constructor for p. func buildSpec(util *objects.Module, p pendingSpec) objects.Object { - if p.namespace { - // A PEP 420 namespace spec: loader None, origin None, the - // portions as submodule_search_locations. machinery.ModuleSpec - // is the faithful constructor; util re-exports it. - // - // CPython: Lib/importlib/_bootstrap.py:573 module_from_spec - machinery, ok := GetModule("importlib.machinery") - if !ok { - return nil - } - ctor, err := machinery.Dict().GetItem(objects.NewStr("ModuleSpec")) - if err != nil { - return nil - } - kwargs := objects.NewDict() - _ = kwargs.SetItem(objects.NewStr("is_package"), objects.True()) - args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.None()}) - spec, cerr := objects.Call(ctor, args, kwargs) - if cerr != nil || spec == objects.None() { - return nil - } - items := make([]objects.Object, len(p.search)) - for i, s := range p.search { - items[i] = objects.NewStr(s) - } - _ = objects.SetAttr(spec, objects.NewStr("submodule_search_locations"), objects.NewList(items)) - return spec + switch { + case p.namespace: + return buildNamespaceSpec(p) + case p.builtin: + return buildBuiltinSpec(util, p) + default: + return buildFileSpec(util, p) } - if p.builtin { - fn, err := util.Dict().GetItem(objects.NewStr("spec_from_loader")) - if err != nil { - return nil - } - // CPython's BuiltinImporter.find_spec passes the importer class - // itself as the loader, so every built-in module's __loader__ is - // BuiltinImporter, not None. Mirror that: a None loader would fail - // test_importlib's test_everyone_has___loader__. - // - // CPython: Lib/importlib/_bootstrap.py:760 BuiltinImporter.find_spec - loader := objects.Object(objects.None()) - // importlib.machinery re-exports _bootstrap.BuiltinImporter, but it - // may not be imported yet when a built-in module loads early. Fall - // back to importlib._bootstrap, which is always live by this point. - for _, modName := range []string{"importlib.machinery", "importlib._bootstrap"} { - m, ok := GetModule(modName) - if !ok { - continue - } - if bi, lerr := m.Dict().GetItem(objects.NewStr("BuiltinImporter")); lerr == nil && bi != nil { - loader = bi - break - } +} + +// buildNamespaceSpec builds a PEP 420 namespace spec: loader None, origin +// None, the portions as submodule_search_locations. machinery.ModuleSpec is +// the faithful constructor; util re-exports it. +// +// CPython: Lib/importlib/_bootstrap.py:573 module_from_spec +func buildNamespaceSpec(p pendingSpec) objects.Object { + machinery, ok := GetModule("importlib.machinery") + if !ok { + return nil + } + ctor, err := machinery.Dict().GetItem(objects.NewStr("ModuleSpec")) + if err != nil { + return nil + } + kwargs := objects.NewDict() + _ = kwargs.SetItem(objects.NewStr("is_package"), objects.True()) + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.None()}) + spec, cerr := objects.Call(ctor, args, kwargs) + if cerr != nil || spec == objects.None() { + return nil + } + items := make([]objects.Object, len(p.search)) + for i, s := range p.search { + items[i] = objects.NewStr(s) + } + _ = objects.SetAttr(spec, objects.NewStr("submodule_search_locations"), objects.NewList(items)) + return spec +} + +// buildBuiltinSpec builds the spec for a built-in module. CPython's +// BuiltinImporter.find_spec passes the importer class itself as the loader, +// so every built-in module's __loader__ is BuiltinImporter, not None. Mirror +// that: a None loader would fail test_importlib's test_everyone_has___loader__. +// +// CPython: Lib/importlib/_bootstrap.py:760 BuiltinImporter.find_spec +func buildBuiltinSpec(util *objects.Module, p pendingSpec) objects.Object { + fn, err := util.Dict().GetItem(objects.NewStr("spec_from_loader")) + if err != nil { + return nil + } + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), builtinImporterLoader()}) + kwargs := objects.NewDict() + _ = kwargs.SetItem(objects.NewStr("origin"), objects.NewStr("built-in")) + spec, cerr := objects.Call(fn, args, kwargs) + if cerr != nil || spec == objects.None() { + return nil + } + return spec +} + +// builtinImporterLoader returns the BuiltinImporter class to use as a +// built-in module's __loader__. importlib.machinery re-exports +// _bootstrap.BuiltinImporter, but it may not be imported yet when a built-in +// module loads early, so fall back to importlib._bootstrap, which is always +// live by this point. None is the last resort. +func builtinImporterLoader() objects.Object { + for _, modName := range []string{"importlib.machinery", "importlib._bootstrap"} { + m, ok := GetModule(modName) + if !ok { + continue } - kwargs := objects.NewDict() - _ = kwargs.SetItem(objects.NewStr("origin"), objects.NewStr("built-in")) - args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), loader}) - spec, cerr := objects.Call(fn, args, kwargs) - if cerr != nil || spec == objects.None() { - return nil + if bi, lerr := m.Dict().GetItem(objects.NewStr("BuiltinImporter")); lerr == nil && bi != nil { + return bi } - return spec } + return objects.None() +} + +// buildFileSpec builds a file-backed spec via spec_from_file_location. +func buildFileSpec(util *objects.Module, p pendingSpec) objects.Object { fn, err := util.Dict().GetItem(objects.NewStr("spec_from_file_location")) if err != nil { return nil diff --git a/module/_posixsubprocess/module.go b/module/_posixsubprocess/module.go index 7efaaf38..0fc2b140 100644 --- a/module/_posixsubprocess/module.go +++ b/module/_posixsubprocess/module.go @@ -21,7 +21,6 @@ import ( "io" "os" "os/exec" - "runtime" "github.com/tamnd/gopy/imp" "github.com/tamnd/gopy/objects" @@ -140,11 +139,12 @@ func forkExec(args []objects.Object, _ map[string]objects.Object) (objects.Objec // owned by Python's subprocess machinery (subprocess.py closes them // explicitly after fork_exec returns). If Go's GC fires the default // finalizer before Python calls os.close(), the fd is closed out from - // under the caller and subsequent os.close() raises EBADF. - // Pattern mirrors module/os/stat_darwin.go osFstat runtime.SetFinalizer. + // under the caller and subsequent os.close() raises EBADF. The finalizer + // is armed on the inner *os.file, so objects.ClearOSFileFinalizer reaches + // it rather than the outer handle (a SetFinalizer no-op). if p2cread >= 0 { f := os.NewFile(uintptr(p2cread), "pipe:stdin") - runtime.SetFinalizer(f, nil) + objects.ClearOSFileFinalizer(f) cmd.Stdin = f } else { cmd.Stdin = io.NopCloser(os.Stdin) @@ -154,7 +154,7 @@ func forkExec(args []objects.Object, _ map[string]objects.Object) (objects.Objec // CPython: Modules/_posixsubprocess.c:730 dup2(c2pwrite, 1) if c2pwrite >= 0 { f := os.NewFile(uintptr(c2pwrite), "pipe:stdout") - runtime.SetFinalizer(f, nil) + objects.ClearOSFileFinalizer(f) cmd.Stdout = f } else { cmd.Stdout = os.Stdout @@ -164,7 +164,7 @@ func forkExec(args []objects.Object, _ map[string]objects.Object) (objects.Objec // CPython: Modules/_posixsubprocess.c:737 dup2(errwrite, 2) if errwrite >= 0 { f := os.NewFile(uintptr(errwrite), "pipe:stderr") - runtime.SetFinalizer(f, nil) + objects.ClearOSFileFinalizer(f) cmd.Stderr = f } else { cmd.Stderr = os.Stderr diff --git a/module/_posixsubprocess/module_test.go b/module/_posixsubprocess/module_test.go index d08744f6..3bfc753a 100644 --- a/module/_posixsubprocess/module_test.go +++ b/module/_posixsubprocess/module_test.go @@ -59,29 +59,29 @@ func makeArgs(argv []string, executable string, cwd string) []objects.Object { // 23 arguments in CPython clinic order: return []objects.Object{ - argList, // args (process_args) - execList, // executable_list - objects.False(), // close_fds + argList, // args (process_args) + execList, // executable_list + objects.False(), // close_fds objects.NewTuple([]objects.Object{}), // pass_fds - cwdObj, // cwd - objects.None(), // env (inherit) - intObj(-1), // p2cread - intObj(-1), // p2cwrite - intObj(-1), // c2pread - intObj(-1), // c2pwrite - intObj(-1), // errread - intObj(-1), // errwrite - intObj(-1), // errpipe_read - intObj(-1), // errpipe_write - objects.True(), // restore_signals - objects.False(), // call_setsid - intObj(-1), // pgid_to_set - objects.None(), // gid - objects.None(), // extra_groups - objects.None(), // uid - intObj(-1), // child_umask - objects.None(), // preexec_fn - objects.False(), // use_vfork + cwdObj, // cwd + objects.None(), // env (inherit) + intObj(-1), // p2cread + intObj(-1), // p2cwrite + intObj(-1), // c2pread + intObj(-1), // c2pwrite + intObj(-1), // errread + intObj(-1), // errwrite + intObj(-1), // errpipe_read + intObj(-1), // errpipe_write + objects.True(), // restore_signals + objects.False(), // call_setsid + intObj(-1), // pgid_to_set + objects.None(), // gid + objects.None(), // extra_groups + objects.None(), // uid + intObj(-1), // child_umask + objects.None(), // preexec_fn + objects.False(), // use_vfork } } @@ -107,16 +107,11 @@ func TestForkExecTrue(t *testing.T) { if err != nil { t.Fatalf("fork_exec: %v", err) } - tup, ok := result.(*objects.Tuple) + // CPython returns PyLong_FromPid(pid): fork_exec yields the child PID as + // a plain int, not a tuple. subprocess.py assigns self.pid directly. + pidObj, ok := result.(*objects.Int) if !ok { - t.Fatalf("expected tuple, got %T", result) - } - if tup.Len() < 2 { - t.Fatalf("expected at least 2-tuple, got len %d", tup.Len()) - } - pidObj, ok := tup.Item(0).(*objects.Int) - if !ok { - t.Fatalf("pid is not an int: %T", tup.Item(0)) + t.Fatalf("expected int pid, got %T", result) } pid, _ := pidObj.Int64() if pid <= 0 { @@ -137,22 +132,15 @@ func TestForkExecEcho(t *testing.T) { if err != nil { t.Fatalf("fork_exec /bin/echo: %v", err) } - tup, ok := result.(*objects.Tuple) + // CPython: Modules/_posixsubprocess.c:1325 return PyLong_FromPid(pid). + pidObj, ok := result.(*objects.Int) if !ok { - t.Fatalf("expected tuple, got %T", result) - } - pidObj, ok := tup.Item(0).(*objects.Int) - if !ok { - t.Fatalf("pid is not an int: %T", tup.Item(0)) + t.Fatalf("expected int pid, got %T", result) } pid, _ := pidObj.Int64() if pid <= 0 { t.Fatalf("expected positive PID, got %d", pid) } - // Sentinel at index 1 must be None. - if tup.Item(1) != objects.None() { - t.Fatalf("expected None sentinel at index 1, got %v", tup.Item(1)) - } } // TestForkExecMissingArgs verifies that fewer than 23 arguments returns a diff --git a/module/io/codecs.go b/module/io/codecs.go index a99450e8..3a9bbb48 100644 --- a/module/io/codecs.go +++ b/module/io/codecs.go @@ -116,22 +116,6 @@ func encodeUTF32(s, variant string) []byte { // --- 8-bit code pages ------------------------------------------------------- -// charmapDecode decodes data using a 256-entry lookup table. -1 in the -// table means the byte is unmapped and should raise UnicodeDecodeError. -// -// CPython: Modules/_codecs/charmap.c PyUnicode_DecodeCharmap -func charmapDecode(data []byte, table *[256]rune, name string) (string, error) { - runes := make([]rune, len(data)) - for i, b := range data { - r := table[b] - if r < 0 { - return "", fmt.Errorf("UnicodeDecodeError: %s can't decode byte 0x%02x", name, b) - } - runes[i] = r - } - return string(runes), nil -} - // charmapEncode encodes s using the inverse of the 256-entry table. // The map is built once at table-construction time. // diff --git a/module/io/fileio.go b/module/io/fileio.go index e33e969c..5af2be42 100644 --- a/module/io/fileio.go +++ b/module/io/fileio.go @@ -14,7 +14,6 @@ import ( "fmt" "io" stdos "os" - "runtime" "syscall" "github.com/tamnd/gopy/objects" @@ -30,10 +29,14 @@ import ( // // CPython: Modules/_io/fileio.c:159 _io_FileIO_close_impl owns the close; // there is no background reclaim of the fd. +// +// os.NewFile arms the finalizer on the unexported inner *os.file, not on the +// returned *os.File, so runtime.SetFinalizer(f, nil) on the outer handle is a +// no-op and leaves the close finalizer live. os.File is struct{ file *file } +// with the inner pointer at offset 0, so read that pointer and clear the +// finalizer on the object it actually points at. func clearGoFinalizer(f *stdos.File) { - if f != nil { - runtime.SetFinalizer(f, nil) - } + objects.ClearOSFileFinalizer(f) } // SMALLCHUNK / DEFAULT_BUFFER_SIZE / LARGE_BUFFER_CUTOFF_SIZE mirror the diff --git a/objects/file.go b/objects/file.go index 4f8a6840..b2a35cea 100644 --- a/objects/file.go +++ b/objects/file.go @@ -22,8 +22,29 @@ import ( "fmt" "io" "os" + "runtime" + "unsafe" ) +// ClearOSFileFinalizer disarms the close finalizer that os.NewFile / +// os.OpenFile arm on a borrowed descriptor. The finalizer is set on the +// unexported inner *os.file, not on the returned *os.File, so +// runtime.SetFinalizer(f, nil) on the outer handle is a no-op and leaves the +// close live: a later GC then closes a descriptor whose integer was already +// freed and reused by another open file, surfacing as a spurious EBADF +// ("bad file descriptor") on the unrelated file's next write. os.File is +// struct{ file *file } with the inner pointer at offset 0, so read that +// pointer and clear the finalizer on the object it actually points at. +func ClearOSFileFinalizer(f *os.File) { + if f == nil { + return + } + inner := *(*unsafe.Pointer)(unsafe.Pointer(f)) + if inner != nil { + runtime.SetFinalizer((*byte)(inner), nil) + } +} + // File mirrors the union of FileIO + the buffer + TextIOWrapper. The // read/write side is decided at open time and does not change; mixing // '+' modes wires both rd and wr at construction. wr is io.Writer From 47107dba2233b999fbf5029c87689c70664dc8fa Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 10:09:25 +0700 Subject: [PATCH 77/84] spec 1731: record the large-stack fd finalizer fix on the checklist --- website/docs/specs/1700/1731_modules_imports_panel.md | 1 + 1 file changed, 1 insertion(+) diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md index 024b30ca..453645be 100644 --- a/website/docs/specs/1700/1731_modules_imports_panel.md +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -108,6 +108,7 @@ CPython 3.14.5 (counts and `-v` lists). - [x] P3: frozen `__hello__`/`__phello__` + aliases, frozen override, `sys._stdlib_dir` — `test_frozen` green (3/3) - [ ] P4: `test_runpy` package-init exception path - [x] P5: `test_import/` runs all 118 tests without the threaded crash — `os.fstat`/`os.isatty` no longer borrow the fd in a finalizer-bearing `os.File`; remaining 5 errors are the `_testmultiphase`/`_testsinglephase` C-extension subinterpreter tests (P7) +- [x] P5: `test_module_with_large_stack` no longer flakes with `bad file descriptor` — `os.NewFile`/`os.OpenFile` arm the close finalizer on the unexported inner `*os.file`, so `SetFinalizer(f, nil)` on the outer handle was a no-op. A leaked borrowed-fd wrapper (subprocess pipes) would close a reused descriptor mid-write. `objects.ClearOSFileFinalizer` reaches the inner pointer; the `io` and `_posixsubprocess` borrows route through it - [ ] P5: re-audit `test_importlib/`, `test_module/` - [ ] P7: live importlib finders on `sys.meta_path` + `_imp` C functions (architectural) - [ ] P6: `test__interpreters` / `test__interpchannels` parity with CPython skip/run From f57245bb12e24e2f3826075af3a049b3eb9a279c Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 10:15:22 +0700 Subject: [PATCH 78/84] os: annotate cross-arch unconvert in stat_linux fstat path The int64() wraps on Atim/Mtim/Ctim Nsec and on Blksize/Blocks are redundant on linux/amd64 (the CI lint host) but necessary on 32-bit linux where those syscall.Stat_t fields are int32. Match the existing //nolint:unconvert pattern already used for Nlink and Blksize above so the linux lint job stays green without dropping 32-bit portability. --- module/os/stat_linux.go | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/module/os/stat_linux.go b/module/os/stat_linux.go index 851bedcb..7c1d6c9d 100644 --- a/module/os/stat_linux.go +++ b/module/os/stat_linux.go @@ -28,8 +28,8 @@ func statSysFields(info goos.FileInfo) (ino, dev, nlink uint64, uid, gid uint32, nlink = uint64(sys.Nlink) //nolint:unconvert // Nlink is uint32 on linux/arm64 uid = sys.Uid gid = sys.Gid - atime = sys.Atim.Sec*1_000_000_000 + int64(sys.Atim.Nsec) - ctime = sys.Ctim.Sec*1_000_000_000 + int64(sys.Ctim.Nsec) + atime = sys.Atim.Sec*1_000_000_000 + int64(sys.Atim.Nsec) //nolint:unconvert // Nsec is int32 on 32-bit linux + ctime = sys.Ctim.Sec*1_000_000_000 + int64(sys.Ctim.Nsec) //nolint:unconvert // Nsec is int32 on 32-bit linux return } @@ -71,12 +71,12 @@ func fstatResult(fdVal int64) (*objects.StructSeq, error) { if err := syscall.Fstat(int(fdVal), &st); err != nil { return nil, fmt.Errorf("OSError: %w", err) } - atime := st.Atim.Sec*1_000_000_000 + int64(st.Atim.Nsec) - mtime := st.Mtim.Sec*1_000_000_000 + int64(st.Mtim.Nsec) - ctime := st.Ctim.Sec*1_000_000_000 + int64(st.Ctim.Nsec) + atime := st.Atim.Sec*1_000_000_000 + int64(st.Atim.Nsec) //nolint:unconvert // Nsec is int32 on 32-bit linux + mtime := st.Mtim.Sec*1_000_000_000 + int64(st.Mtim.Nsec) //nolint:unconvert // Nsec is int32 on 32-bit linux + ctime := st.Ctim.Sec*1_000_000_000 + int64(st.Ctim.Nsec) //nolint:unconvert // Nsec is int32 on 32-bit linux return newStatResult(int64(st.Mode), int64(st.Ino), int64(st.Dev), int64(st.Nlink), int64(st.Uid), int64(st.Gid), st.Size, atime, mtime, ctime, - int64(st.Blksize), int64(st.Blocks), int64(st.Rdev)), nil + int64(st.Blksize), int64(st.Blocks), int64(st.Rdev)), nil //nolint:unconvert // Blksize/Blocks are int32 on 32-bit linux } // getuid returns the real user ID of the calling process. From c540c7d8e35f4b7dff941f3f5178ad37177001c3 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 10:30:14 +0700 Subject: [PATCH 79/84] gopy: make the importlib bootstrap install idempotent run() reuses one process-wide sys.modules across invocations, while CPython gets a fresh interpreter per process and runs init_importlib exactly once. The cmd/gopy tests call run() several times in a single test binary: the first call installs the import system and aliases _frozen_importlib to the source _bootstrap module (which has no __origname__), and the next call re-ran _bootstrap._install, so _setup re-scanned sys.modules and tripped the frozen fix-up assert ('see PyImport_ImportFrozenModuleObject()') on that aliased module. Guard the install on '_frozen_importlib' not in sys.modules so it runs once, matching CPython. The standalone binary was unaffected (one bootstrap per process) which is why it only surfaced under go test. --- cmd/gopy/main.go | 50 ++++++++++++++++++++++++++++++------------------ 1 file changed, 31 insertions(+), 19 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 37287ec6..85be5dc5 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -363,10 +363,22 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File // FileFinder path hook to sys.path_hooks. // // CPython: Python/pylifecycle.c:1041 init_importlib_external - install := "import importlib, sys, _imp\n" + - "from importlib import _bootstrap, _bootstrap_external\n" + - "_bootstrap._install(sys, _imp)\n" + - "_bootstrap_external._install(_bootstrap)\n" + + // CPython runs init_importlib exactly once, against a fresh per-process + // interpreter. gopy reuses one process-wide sys.modules across every run() + // invocation (the cmd/gopy tests call run() several times in a single + // binary), so the install must be idempotent. Once the import system is + // live, sys.modules already holds _frozen_importlib aliased to the source + // _bootstrap module, which carries no __origname__; re-running + // _bootstrap._install would make _setup re-scan sys.modules and trip the + // frozen fix-up assert on it. Guard the whole install on the first run. + // + // CPython: Python/pylifecycle.c:1041 init_importlib_external + install := "import sys\n" + + "if '_frozen_importlib' not in sys.modules:\n" + + " import importlib, _imp\n" + + " from importlib import _bootstrap, _bootstrap_external\n" + + " _bootstrap._install(sys, _imp)\n" + + " _bootstrap_external._install(_bootstrap)\n" + // CPython's C bootstrap freezes _bootstrap / _bootstrap_external and // publishes them under the _frozen_importlib* names; importlib then // aliases those exact objects to importlib._bootstrap[_external]. gopy @@ -375,17 +387,17 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File // importlib._bootstrap identical (issue #15386 / bootstrap tests). // // CPython: Lib/importlib/__init__.py:50 (_bootstrap aliasing) - "sys.modules['_frozen_importlib'] = _bootstrap\n" + - "sys.modules['_frozen_importlib_external'] = _bootstrap_external\n" + + " sys.modules['_frozen_importlib'] = _bootstrap\n" + + " sys.modules['_frozen_importlib_external'] = _bootstrap_external\n" + // CPython registers the zipimporter path hook ahead of FileFinder // (C-side, _PyImportZip_Init) so a sys.path entry pointing at a zip // archive is claimed before the directory finder rejects it. // CPython: Python/pylifecycle.c init_importlib_external (zipimport) - "try:\n" + - " import zipimport\n" + - " sys.path_hooks.insert(0, zipimport.zipimporter)\n" + - "except ImportError:\n" + - " pass\n" + + " try:\n" + + " import zipimport\n" + + " sys.path_hooks.insert(0, zipimport.zipimporter)\n" + + " except ImportError:\n" + + " pass\n" + // CPython freezes importlib._bootstrap[_external] and the importlib // package, so _setup gives them a __spec__ via the frozen loader // before any user import runs. gopy loads these as plain .py files @@ -398,14 +410,14 @@ func bootstrapEncodings(ts *state.Thread, globals *objects.Dict, stderr *os.File // `import importlib.util` raises AttributeError at _bootstrap.py:1325. // // CPython: Lib/importlib/_bootstrap.py:1517 _setup (spec fix-up loop) - "for _n in list(sys.modules):\n" + - " _m = sys.modules[_n]\n" + - " if getattr(_m, '__spec__', None) is None and getattr(_m, '__file__', None):\n" + - " try:\n" + - " _sp = _bootstrap_external.spec_from_file_location(_n, _m.__file__)\n" + - " _bootstrap._init_module_attrs(_sp, _m, override=True)\n" + - " except Exception:\n" + - " pass\n" + " for _n in list(sys.modules):\n" + + " _m = sys.modules[_n]\n" + + " if getattr(_m, '__spec__', None) is None and getattr(_m, '__file__', None):\n" + + " try:\n" + + " _sp = _bootstrap_external.spec_from_file_location(_n, _m.__file__)\n" + + " _bootstrap._init_module_attrs(_sp, _m, override=True)\n" + + " except Exception:\n" + + " pass\n" if _, err := pythonrun.RunString(ts, install, "", parser.ModeFile, globals, nil); err != nil { fmt.Fprintln(stderr, "preload importlib:", err) return 1 From 8811662d606860d8b9323d0f294ce941703a9dce Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 10:58:31 +0700 Subject: [PATCH 80/84] spec 1731: refresh the imports panel after re-audit test_runpy, test_pkg, test_pkgutil, test_modulefinder, test_pyclbr, and test_zipapp all run green now; record them and narrow the remaining residuals to the test_import C-ext subinterp errors and the two test_importlib GC/threading edge cases. --- .../specs/1700/1731_modules_imports_panel.md | 42 +++++++++++-------- 1 file changed, 25 insertions(+), 17 deletions(-) diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md index 453645be..ecb4a5a7 100644 --- a/website/docs/specs/1700/1731_modules_imports_panel.md +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -29,21 +29,21 @@ tree before porting. The panel is the 12 flat files plus the three directory suites. CPython 3.14.5 runs all of the non-interpreter files green. -| Test | CPython 3.14.5 | gopy (audit 2026-06-15) | +| Test | CPython 3.14.5 | gopy (audit 2026-06-16) | | --- | --- | --- | -| `test_module/` (dir) | OK | OK (39 tests) | -| `test_import/` (dir) | OK | import error: full importlib finders not live | -| `test_importlib/` (dir) | OK | depends on live finders | -| `test_modulefinder` | OK | 17 ERROR: `importlib.machinery.PathFinder` missing | -| `test_pkg` | OK | AssertionError: module `dir()` missing `__cached__`/`__doc__`/`__loader__`/`__spec__` | -| `test_pkgutil` | OK | 7 failures, 1 error | -| `test_pyclbr` | OK | `ModuleNotFoundError: pyclbr` | +| `test_module/` (dir) | OK | **OK (39 tests)** | +| `test_import/` (dir) | OK | 118 tests; 5 errors (`_testsinglephase`/`_testmultiphase` C-ext subinterp, P7), 16 skipped | +| `test_importlib/` (dir) | OK | 1346 tests; 2 failures (module-lock GC lifetime, threaded circular import) + 1 error (incomplete multi-phase C-ext), 63 skipped | +| `test_modulefinder` | OK | **OK (17 tests)** | +| `test_pkg` | OK | **OK (8 tests)** | +| `test_pkgutil` | OK | **OK (21 tests)** | +| `test_pyclbr` | OK | **OK (6 tests)** | | `test_pkgimport` | (covered by `test_import/`) | no flat file | -| `test_runpy` | OK | 3 ERROR | +| `test_runpy` | OK | **OK (40 tests)** | | `test_frozen` | OK | **OK (3/3)** — frozen test modules + override + `sys._stdlib_dir` shipped | | `test_zipimport` | OK | **OK (91 tests, 4 skipped)** | | `test_zipimport_support` | OK | needs vendored `test.test_doctest` (doctest) | -| `test_zipapp` | OK | `ModuleNotFoundError: zipapp` | +| `test_zipapp` | OK | **OK (35 tests)** | | `test__interpchannels` | PEP 554 | deferred (see below) | | `test__interpreters` | PEP 554 | deferred (`_interpreters.run_string` missing) | @@ -98,17 +98,25 @@ CPython 3.14.5 (counts and `-v` lists). ## Checklist -- [ ] P1: `os.altsep` -- [ ] P1: module-object `dir()` surface (`__cached__`, `__doc__`, `__loader__`, `__spec__`) for `test_pkg` -- [ ] P2: vendor `modulefinder` -- [ ] P2: vendor `pyclbr` -- [ ] P2: vendor `zipapp` +- [x] P1: `os.altsep` +- [x] P1: module-object `dir()` surface (`__cached__`, `__doc__`, `__loader__`, `__spec__`) for `test_pkg` — `test_pkg` green (8 tests) +- [x] P2: vendor `modulefinder` — `test_modulefinder` green (17 tests) +- [x] P2: vendor `pyclbr` — `test_pyclbr` green (6 tests) +- [x] P2: vendor `zipapp` — `test_zipapp` green (35 tests) +- [x] P2: `test_pkgutil` green (21 tests) - [x] `test_zipimport` green (91 tests): `func_getattro` incref + `config_get` port - [x] `test_module/` green (39 tests) - [x] P3: frozen `__hello__`/`__phello__` + aliases, frozen override, `sys._stdlib_dir` — `test_frozen` green (3/3) -- [ ] P4: `test_runpy` package-init exception path +- [x] P4: `test_runpy` green (40 tests) — package-init exception path closed - [x] P5: `test_import/` runs all 118 tests without the threaded crash — `os.fstat`/`os.isatty` no longer borrow the fd in a finalizer-bearing `os.File`; remaining 5 errors are the `_testmultiphase`/`_testsinglephase` C-extension subinterpreter tests (P7) - [x] P5: `test_module_with_large_stack` no longer flakes with `bad file descriptor` — `os.NewFile`/`os.OpenFile` arm the close finalizer on the unexported inner `*os.file`, so `SetFinalizer(f, nil)` on the outer handle was a no-op. A leaked borrowed-fd wrapper (subprocess pipes) would close a reused descriptor mid-write. `objects.ClearOSFileFinalizer` reaches the inner pointer; the `io` and `_posixsubprocess` borrows route through it -- [ ] P5: re-audit `test_importlib/`, `test_module/` +- [x] P5: re-audit `test_module/` — green (39 tests) +- [ ] P5: `test_importlib/` residuals — 1346 tests run, down to 2 failures + 1 error. The error + (`test_incomplete_multi_phase_init_module`) is the `_testmultiphase` C-ext path (P7). The two + failures are GC/threading edge cases: `test_all_locks` expects `_bootstrap._module_locks` to drain + to zero after `gc_collect()` (gopy's collector leaves the no-longer-referenced `_ModuleLock` + weakref entries live across the full import sweep, though the isolated `test_lock_lifetime` passes), + and `test_circular_imports` is a threaded-import determinism case. Both overlap the broader + weakref/GC work (see the weakref/gc panel tasks). - [ ] P7: live importlib finders on `sys.meta_path` + `_imp` C functions (architectural) - [ ] P6: `test__interpreters` / `test__interpchannels` parity with CPython skip/run From 2ec1e4b9e821768c8fef5edb8874464835f47b88 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 18:39:18 +0700 Subject: [PATCH 81/84] import: single-phase extension cache, circular import, _gcd_import hook Build out the single-phase-init extension subsystem the test_import panel drives through ExtensionFileLoader: - imp/extension.go: extensions cache keyed by (path, name) with the three module kinds (m_size -1 basic, 0 reinit, >0 with-state), reload via m_copy for basic, modules_by_index per interpreter backing look_up_self, and clear_extension for teardown restore. - _testsinglephase: the basic / basic_wrapper / basic_copy / with_reinit / with_state / check_cache_first / raise_exception / circular variants, matching the PyInit_ entry points the .c module exposes. - _testsinglephase_circular imports its helper from PyInit before adding itself to sys.modules and caches itself in a static var (gh-123950). - PyImport_ImportModule now drives the live importlib _gcd_import so a deeply dotted namespace-package helper resolves with its parents, which the Go-only ImportModule driver did not import. - _testinternalcapi.clear_extension wired to _PyImport_ClearExtension. test.test_import is down to the multi-interpreter isolation cases that need real per-interpreter sys.modules. --- cmd/gopy/main.go | 13 + imp/extension.go | 645 +++++++++++++++++++++++++++++ imp/import.go | 22 + imp/pathfinder.go | 64 +++ module/_imp/module.go | 35 +- module/_interpreters/module.go | 112 ++++- module/_testinternalcapi/module.go | 57 +++ module/_testmultiphase/module.go | 38 +- module/_testsinglephase/module.go | 393 ++++++++++++++++++ stdlibinit/registry.go | 7 + vm/copyreg_hook.go | 15 + 11 files changed, 1390 insertions(+), 11 deletions(-) create mode 100644 imp/extension.go create mode 100644 module/_testsinglephase/module.go diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 85be5dc5..2fc0a1ad 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -273,6 +273,19 @@ func installPathFinder(scriptPath string) { } if root := findStdlibRoot(); root != "" { paths = append(paths, root) + // Materialize the compiled-in extension modules as stub files in a + // lib-dynload directory and add it to sys.path, the gopy analogue of + // CPython's /lib-dynload. The real PathFinder -> FileFinder + // discovers them by suffix and routes them through ExtensionFileLoader + // -> _imp.create_dynamic, so module.__spec__.loader is an + // ExtensionFileLoader exactly as for a CPython .so. The stub lives + // outside the vendored stdlib tree so that tree stays pristine. + // + // CPython: Modules/getpath.py (lib-dynload on sys.path) + dynload := filepath.Join(os.TempDir(), "gopy-lib-dynload") + if err := imp.MaterializeExtensions(dynload); err == nil { + paths = append(paths, dynload) + } // Expose the resolved stdlib root as sys._stdlib_dir so // FrozenImporter._resolve_filename can compute __file__ and a // frozen package's __path__ against the on-disk Lib copy, letting diff --git a/imp/extension.go b/imp/extension.go new file mode 100644 index 00000000..cf05b329 --- /dev/null +++ b/imp/extension.go @@ -0,0 +1,645 @@ +package imp + +import ( + "fmt" + "os" + "path/filepath" + "runtime" + "sort" + "sync" + + "github.com/tamnd/gopy/objects" +) + +// This file ports the slice of CPython's extension-module import machinery +// the standard-library test suite drives through _testmultiphase / +// _testsinglephase and the SubinterpImportTests: the PEP 489 "multiple +// interpreters" / per-interpreter-GIL compatibility check and the +// subinterpreter interpreter-state that check consults. +// +// gopy cannot dlopen a compiled C extension, so the extensions are ported +// as Go builtins and registered here keyed by module name, each carrying +// the PEP 489 slot metadata its PyModuleDef declares. _imp.create_dynamic +// dispatches to this registry, applying CheckExtSubinterpCompat exactly the +// way Objects/moduleobject.c:359 PyModule_FromDefAndSpec2 and +// Python/import.c:1555 _PyImport_CheckSubinterpIncompatibleExtensionAllowed +// do before the module body runs. + +// Multiple-interpreters support levels, the Py_mod_multiple_interpreters +// slot values an extension's PyModuleDef may carry. +// +// CPython: Include/moduleobject.h:90 Py_MOD_MULTIPLE_INTERPRETERS_* +const ( + // MultiInterpNotSupported is Py_MOD_MULTIPLE_INTERPRETERS_NOT_SUPPORTED. + MultiInterpNotSupported = iota + // MultiInterpSupported is Py_MOD_MULTIPLE_INTERPRETERS_SUPPORTED, the + // default when a multi-phase module declares no slot. + MultiInterpSupported + // MultiInterpPerInterpreterGIL is Py_MOD_PER_INTERPRETER_GIL_SUPPORTED. + MultiInterpPerInterpreterGIL +) + +// ExtModuleDef is gopy's analogue of a C extension's PyModuleDef plus the +// PEP 489 slot table the loader reads. Init builds the fully populated +// module body (gopy has no separate create / exec phase for builtins, so +// the create_dynamic step runs Init and exec_dynamic is a no-op). +// +// CPython: Include/moduleobject.h:74 PyModuleDef_Slot +type ExtModuleDef struct { + Name string + // SinglePhase marks a legacy single-phase-init module. Such modules + // never support loading under multiple interpreters, so the compat + // check rejects them in any non-main interpreter that enforces it. + SinglePhase bool + // HasMultiInterpSlot records whether the def declared a + // Py_mod_multiple_interpreters slot. When false a multi-phase module + // defaults to MultiInterpSupported. + HasMultiInterpSlot bool + // MultiInterp is the Py_mod_multiple_interpreters slot value. + MultiInterp int + // MSize is the PyModuleDef.m_size of a single-phase module: -1 for a + // "basic" module with no per-module state that does not support repeated + // initialization (its __dict__ is cached in m_copy and copied on reload), + // 0 for a "reinit" module, and >0 for a module that carries its own state. + // Only -1 modules are reloaded from the cached dict; the others re-run + // their init function on every load. + // + // CPython: Python/import.c:920 single-phase init module kinds + MSize int + // DefName is the def's m_name, the module's __name__. It defaults to Name + // but differs for an "indirect" variant whose init function builds a + // module under another def's name (PyInit__testsinglephase_basic_wrapper). + DefName string + // ShareDefWith names a registered module whose def (and thus its + // modules_by_index slot and cached m_copy) this entry reuses, the gopy + // analogue of one init function calling another's. + // + // CPython: Python/import.c:960 "two or more modules share a PyModuleDef" + ShareDefWith string + // CheckCacheFirst marks the *_check_cache_first variants, whose init + // returns PyState_FindModule(def) before creating a fresh module and which + // are never recorded in the extensions cache. + // + // CPython: Modules/_testsinglephase.c:690 _check_cache_first modules + CheckCacheFirst bool + // Init builds the module. A non-nil error models a PyInit function + // that raised before returning its def. + Init func() (*objects.Module, error) +} + +var ( + extMu sync.Mutex + extRegistry = map[string]*ExtModuleDef{} +) + +// RegisterExtModule records an extension module by name. Test-extension +// packages call it from their package init, the gopy stand-in for the +// inittab entry a compiled extension would expose. +func RegisterExtModule(def *ExtModuleDef) { + extMu.Lock() + extRegistry[def.Name] = def + extMu.Unlock() +} + +// FindExtModule returns the registered extension def for name, or nil. +func FindExtModule(name string) *ExtModuleDef { + extMu.Lock() + def := extRegistry[name] + extMu.Unlock() + return def +} + +// ExtModuleNames returns the registered extension-module names, sorted. +func ExtModuleNames() []string { + extMu.Lock() + names := make([]string, 0, len(extRegistry)) + for n := range extRegistry { + names = append(names, n) + } + extMu.Unlock() + sort.Strings(names) + return names +} + +// interpState models the slice of PyInterpreterState the extension compat +// check reads: whether this is the main interpreter, whether it runs with +// its own GIL, and the check_multi_interp_extensions config flag (plus the +// _imp._override_multi_interp_extensions_check override). +// +// CPython: Include/internal/pycore_interp.h PyInterpreterState (ceval.own_gil, +// feature flags) +type interpState struct { + isMain bool + ownGil bool + checkMulti bool + // override is the _imp._override_multi_interp_extensions_check value: + // <0 force-disable, 0 use config, >0 force-enable. + override int + // id is the interpreter id; the main interpreter is 0. It tags the + // extensions-cache entries a single-phase module records so a reload only + // reuses a dict the same interpreter owns. + id int64 + // modByIndex is the interpreter's modules_by_index cache: m_index -> + // module, the table PyState_FindModule / look_up_self consults. + // + // CPython: Include/internal/pycore_interp.h modules_by_index + modByIndex map[int]*objects.Module +} + +var ( + interpMu sync.Mutex + interpStack = []*interpState{{isMain: true, id: 0, modByIndex: map[int]*objects.Module{}}} + nextInterpID int64 +) + +// currentInterp returns the interpreter state on top of the stack. gopy +// runs subinterpreter scripts synchronously on the calling goroutine, so a +// single push/pop stack tracks the active interpreter for the duration of a +// run_in_subinterp_with_config / _interpreters.run_string call. +func currentInterp() *interpState { + interpMu.Lock() + defer interpMu.Unlock() + return interpStack[len(interpStack)-1] +} + +// PushSubinterp pushes a fresh non-main interpreter state for the duration +// of a subinterpreter run. ownGil reflects the config gil ('own' -> true, +// 'shared'/'default' -> false); checkMulti is config.check_multi_interp_extensions. +// +// CPython: Python/pylifecycle.c:586 init_interp_create_gil (own_gil) and +// Python/interpconfig.c:262 check_multi_interp_extensions feature flag. +func PushSubinterp(ownGil, checkMulti bool) { + interpMu.Lock() + nextInterpID++ + interpStack = append(interpStack, &interpState{ + ownGil: ownGil, + checkMulti: checkMulti, + id: nextInterpID, + modByIndex: map[int]*objects.Module{}, + }) + interpMu.Unlock() +} + +// PopSubinterp pops the interpreter state pushed by PushSubinterp. The main +// interpreter at the bottom of the stack is never popped. +func PopSubinterp() { + interpMu.Lock() + if len(interpStack) > 1 { + interpStack = interpStack[:len(interpStack)-1] + } + interpMu.Unlock() +} + +// SetMultiInterpOverride sets the current interpreter's +// check_multi_interp_extensions override and returns the previous value. +// +// CPython: Python/import.c:5052 _imp__override_multi_interp_extensions_check_impl +func SetMultiInterpOverride(override int) int { + interpMu.Lock() + defer interpMu.Unlock() + s := interpStack[len(interpStack)-1] + old := s.override + s.override = override + return old +} + +// checkMultiInterpExtensions reports whether the current interpreter +// enforces the subinterpreter-incompatible-extension check. +// +// CPython: Python/import.c:1538 check_multi_interp_extensions +func checkMultiInterpExtensions(s *interpState) bool { + if s.override < 0 { + return false + } + if s.override > 0 { + return true + } + return s.checkMulti +} + +// CheckExtSubinterpCompat applies the PEP 489 multiple-interpreters / +// per-interpreter-GIL compatibility check to def against the active +// interpreter. It returns an ImportError-tagged error when the module may +// not be loaded in the current subinterpreter, and nil otherwise. +// +// CPython: Objects/moduleobject.c:359 PyModule_FromDefAndSpec2 (slot gate) +// CPython: Python/import.c:1555 _PyImport_CheckSubinterpIncompatibleExtensionAllowed +func CheckExtSubinterpCompat(def *ExtModuleDef) error { + s := currentInterp() + if s.isMain { + return nil + } + // Single-phase-init modules never support multiple interpreters; the + // fresh-import and cached-reload paths both call the check directly. + // + // CPython: Python/import.c:1983 import_find_extension / 2198 import_run_extension + if def.SinglePhase { + if checkMultiInterpExtensions(s) { + return subinterpIncompatible(def.Name) + } + return nil + } + + multi := MultiInterpSupported + if def.HasMultiInterpSlot { + multi = def.MultiInterp + } + switch { + case multi == MultiInterpNotSupported: + if checkMultiInterpExtensions(s) { + return subinterpIncompatible(def.Name) + } + case multi != MultiInterpPerInterpreterGIL && s.ownGil: + // Supported-but-not-per-interpreter-GIL: only rejected when the + // subinterpreter runs with its own GIL. + if checkMultiInterpExtensions(s) { + return subinterpIncompatible(def.Name) + } + } + return nil +} + +// subinterpIncompatible builds the ImportError the compat check raises. The +// message matches CPython byte-for-byte so the SubinterpImportTests' +// equality assertions on str(exc) pass. +// +// CPython: Python/import.c:1560 PyErr_Format(PyExc_ImportError, ...) +func subinterpIncompatible(name string) error { + return fmt.Errorf("ImportError: module %s does not support loading in subinterpreters", name) +} + +// extDef is gopy's analogue of a single PyModuleDef instance: the unit the +// extensions cache and the modules_by_index table key on. Two registry +// entries that share a def (an init function that calls another's) point at +// the same extDef, so they share an m_index (PyState_FindModule / look_up_self) +// and, for a basic module, the cached m_copy. +// +// CPython: Include/internal/pycore_moduleobject.h PyModuleDef_Base +type extDef struct { + name string // m_name; the module's __name__, may differ from the import name + mSize int // PyModuleDef.m_size + index int // m_index into modules_by_index; 0 until assigned on first load +} + +// extCacheKey keys the extensions cache by (filename, name), exactly as +// _PyRuntime.imports.extensions does. +// +// CPython: Python/import.c:1379 _extensions_cache_set +type extCacheKey struct{ path, name string } + +// extCacheValue is the cached single-phase module record: its def, a shallow +// copy of the module __dict__ after the first load (m_copy, basic modules +// only), and the interpreter that owns the copy. +// +// CPython: Python/import.c:1024 struct extensions_cache_value +type extCacheValue struct { + def *extDef + mCopy *objects.Dict + interpid int64 +} + +var ( + extCacheMu sync.Mutex + extCache = map[extCacheKey]*extCacheValue{} + extDefs = map[string]*extDef{} // def name -> shared def + nextModIdx = 0 + modToDef = map[*objects.Module]*extDef{} // built module -> its def +) + +// defFor returns the shared extDef for a registered single-phase module, +// creating it on first use. Entries that name a ShareDefWith reuse the +// referenced module's def so they land in the same modules_by_index slot. +func defFor(def *ExtModuleDef) *extDef { + name := def.DefName + if name == "" { + name = def.Name + } + if def.ShareDefWith != "" { + if shared := FindExtModule(def.ShareDefWith); shared != nil { + sn := shared.DefName + if sn == "" { + sn = shared.Name + } + name = sn + } + } + if ed, ok := extDefs[name]; ok { + return ed + } + ed := &extDef{name: name, mSize: def.MSize} + extDefs[name] = ed + return ed +} + +// CreateExtModule dispatches _imp.create_dynamic to the extension registry. +// It mirrors Python/import.c import_run_extension: a cached single-phase +// module is reloaded from the cache, otherwise the init runs fresh behind the +// PEP 489 compat gate and (for single-phase modules) its result is recorded +// in the extensions cache. path is spec.origin, the extensions-cache key +// alongside name. The caller attaches __file__ / __spec__ / __loader__. +// +// found is false when name is not a registered gopy extension, letting the +// caller fall back to the "gopy cannot dlopen" ImportError. +// +// CPython: Python/import.c:2001 import_run_extension +func CreateExtModule(name, path string) (mod *objects.Module, found bool, err error) { + def := FindExtModule(name) + if def == nil { + return nil, false, nil + } + if !def.SinglePhase { + // Multi-phase modules apply the compat gate as part of + // PyModule_FromDefAndSpec2 (the create step) before the body runs. + if cerr := CheckExtSubinterpCompat(def); cerr != nil { + return nil, true, cerr + } + mod, err = def.Init() + if err != nil { + return nil, true, err + } + return mod, true, nil + } + + ed := func() *extDef { + extCacheMu.Lock() + defer extCacheMu.Unlock() + return defFor(def) + }() + + // import_find_extension: a cached single-phase module is reloaded without + // re-running its init. The *_check_cache_first variants are never cached. + // + // CPython: Python/import.c:1964 import_find_extension + if !def.CheckCacheFirst { + extCacheMu.Lock() + cached, ok := extCache[extCacheKey{path, name}] + extCacheMu.Unlock() + if ok { + return reloadSinglephase(def, ed, cached, name) + } + } + return runSinglephase(def, ed, name, path) +} + +// runSinglephase ports the fresh-load path: it runs the init (on the "main +// interpreter", before the compat gate), applies the subinterpreter compat +// check, then records the module in modules_by_index and the extensions +// cache. A failing init inside a subinterpreter takes the gh-144601 path. +// +// CPython: Python/import.c:2078 import_run_extension +func runSinglephase(def *ExtModuleDef, ed *extDef, name, path string) (*objects.Module, bool, error) { + inSubinterp := !currentInterp().isMain + mod, initErr := def.Init() + if initErr != nil { + if inSubinterp { + // gh-144601: the exception object can't be transferred across + // interpreters. Print it as an unraisable exception, then raise + // a different exception for the calling interpreter. + // + // CPython: Python/import.c:2156 PyErr_FormatUnraisable + if objects.WriteUnraisableHook != nil { + objects.WriteUnraisableHook(nil, "Exception while importing from subinterpreter", initErr) + } + // CPython: Python/import.c:2168 PyErr_SetString(PyExc_ImportError, ...) + return nil, true, fmt.Errorf("ImportError: failed to import from subinterpreter due to exception") + } + return nil, true, initErr + } + if cerr := CheckExtSubinterpCompat(def); cerr != nil { + return nil, true, cerr + } + + s := currentInterp() + extCacheMu.Lock() + if ed.index == 0 { + nextModIdx++ + ed.index = nextModIdx + } + modToDef[mod] = ed + // update_global_state_for_extension caches the def under the main + // interpreter or for any m_size == -1 module; a basic module also stores + // a shallow copy of its dict for later reloads. The *_check_cache_first + // variants are deliberately not cached. + // + // CPython: Python/import.c:1761 update_global_state_for_extension + if !def.CheckCacheFirst && (s.isMain || ed.mSize == -1) { + var mCopy *objects.Dict + if ed.mSize == -1 { + mCopy = snapshotDict(mod.Dict()) + } + extCache[extCacheKey{path, name}] = &extCacheValue{def: ed, mCopy: mCopy, interpid: s.id} + } + extCacheMu.Unlock() + + setModuleByIndex(s, ed.index, mod) + return mod, true, nil +} + +// reloadSinglephase ports reload_singlephase_extension: a basic module +// (m_size == -1) is rebuilt by copying its cached dict into a fresh module +// without re-running init (so its global initialized_count is unchanged); a +// module with state re-runs its init function. +// +// CPython: Python/import.c:1869 reload_singlephase_extension +func reloadSinglephase(def *ExtModuleDef, ed *extDef, cached *extCacheValue, name string) (*objects.Module, bool, error) { + // It may have been imported before in an interpreter that allows legacy + // modules but is barred in the current one. + if cerr := CheckExtSubinterpCompat(def); cerr != nil { + return nil, true, cerr + } + s := currentInterp() + if ed.mSize == -1 { + // import_add_module: reuse the existing sys.modules entry so the + // reloaded module is the same object, then PyDict_Update its dict + // from the cached copy without re-running init. + // + // CPython: Python/import.c:1884 import_add_module / PyDict_Update + mod, ok := GetModule(name) + if !ok { + mod = objects.NewModule(ed.name) + AddModule(name, mod) + } + dst := mod.Dict() + for _, k := range cached.mCopy.Keys() { + v, gerr := cached.mCopy.GetItem(k) + if gerr != nil { + return nil, true, gerr + } + if serr := dst.SetItem(k, v); serr != nil { + return nil, true, serr + } + } + extCacheMu.Lock() + modToDef[mod] = ed + extCacheMu.Unlock() + setModuleByIndex(s, ed.index, mod) + return mod, true, nil + } + // m_size >= 0: re-run the init function. + mod, err := def.Init() + if err != nil { + return nil, true, err + } + extCacheMu.Lock() + modToDef[mod] = ed + extCacheMu.Unlock() + setModuleByIndex(s, ed.index, mod) + return mod, true, nil +} + +// snapshotDict returns a shallow copy of d, the gopy analogue of the m_copy +// the import machinery saves after a basic module is first loaded. +// +// CPython: Python/import.c:1140 fixup_cached_def (def->m_base.m_copy) +func snapshotDict(d *objects.Dict) *objects.Dict { + out := objects.NewDict() + for _, k := range d.Keys() { + if v, err := d.GetItem(k); err == nil { + _ = out.SetItem(k, v) + } + } + return out +} + +// setModuleByIndex records mod in the interpreter's modules_by_index table, +// the slot PyState_FindModule / look_up_self reads. +// +// CPython: Python/import.c:651 _modules_by_index_set +func setModuleByIndex(s *interpState, index int, mod *objects.Module) { + if index <= 0 { + return + } + interpMu.Lock() + if s.modByIndex == nil { + s.modByIndex = map[int]*objects.Module{} + } + s.modByIndex[index] = mod + interpMu.Unlock() +} + +// ModuleSelf returns the module currently cached in modules_by_index for the +// def mod belongs to, the value PyState_FindModule(def) yields. It backs the +// test extension's look_up_self() method. +// +// CPython: Modules/_testsinglephase.c:374 common_look_up_self (PyState_FindModule) +func ModuleSelf(mod *objects.Module) objects.Object { + extCacheMu.Lock() + ed := modToDef[mod] + extCacheMu.Unlock() + if ed == nil || ed.index == 0 { + return objects.None() + } + s := currentInterp() + interpMu.Lock() + found := s.modByIndex[ed.index] + interpMu.Unlock() + if found == nil { + return objects.None() + } + return found +} + +// ClearExtension clears the internally cached data for a single-phase +// extension: its modules_by_index slot, the cached def's m_index/m_copy, and +// the extensions-cache entry. It backs _testinternalcapi.clear_extension. +// +// CPython: Python/import.c:903 _PyImport_ClearExtension +// +// (Python/import.c:2241 clear_singlephase_extension) +func ClearExtension(name, path string) error { + extCacheMu.Lock() + cached, ok := extCache[extCacheKey{path, name}] + if !ok { + extCacheMu.Unlock() + return nil + } + ed := cached.def + index := ed.index + ed.index = 0 + delete(extCache, extCacheKey{path, name}) + extCacheMu.Unlock() + + if index > 0 { + s := currentInterp() + interpMu.Lock() + delete(s.modByIndex, index) + interpMu.Unlock() + } + return nil +} + +// extensionSuffix is the file suffix gopy advertises for its +// (Go-implemented) extension modules. CPython derives it from the ABI tag +// and platform triple; gopy keeps the shape ("..so") so __file__ reads +// like a real extension path and the ExtensionFileLoader path hook matches. +// +// CPython: Lib/importlib/_bootstrap_external.py:_get_supported_file_loaders +func extensionSuffix() string { + return fmt.Sprintf(".gopy-314-%s-%s.so", runtime.GOOS, runtime.GOARCH) +} + +// ExtensionSuffixes returns the extension-module suffixes _imp.extension_suffixes +// reports. A single gopy suffix is enough for the test extensions. +// +// CPython: Python/import.c:4807 _imp_extension_suffixes_impl +func ExtensionSuffixes() []string { + return []string{extensionSuffix()} +} + +var ( + extDirMu sync.Mutex + extDirVal string +) + +// SetExtensionDir records the directory the materialized extension stub +// files live in (the gopy analogue of CPython's lib-dynload). The path +// finder discovers the stubs there and ExtensionOrigin reports __file__ +// against it. +func SetExtensionDir(dir string) { + extDirMu.Lock() + extDirVal = dir + extDirMu.Unlock() +} + +func extensionDir() string { + extDirMu.Lock() + defer extDirMu.Unlock() + return extDirVal +} + +// ExtensionOrigin synthesizes the __file__ path for a Go-implemented +// extension: /, the location a compiled extension +// would occupy. When the extension dir is unset the bare filename is +// returned. +func ExtensionOrigin(name string) string { + suffix := extensionSuffix() + if dir := extensionDir(); dir != "" { + return filepath.Join(dir, name+suffix) + } + return name + suffix +} + +// MaterializeExtensions writes an empty stub file into dir +// for every registered extension module, the gopy stand-in for the +// compiled .so files CPython ships in lib-dynload. The real Python +// PathFinder -> FileFinder discovers these by suffix and hands them to +// ExtensionFileLoader, whose create_module calls _imp.create_dynamic -> +// CreateExtModule. The stub bytes are never read; the Go registry holds +// the actual module body. dir is recorded as the extension dir. +func MaterializeExtensions(dir string) error { + if err := os.MkdirAll(dir, 0o755); err != nil { + return err + } + suffix := extensionSuffix() + for _, name := range ExtModuleNames() { + p := filepath.Join(dir, name+suffix) + if _, err := os.Stat(p); err == nil { + continue + } + if err := os.WriteFile(p, nil, 0o644); err != nil { + return err + } + } + SetExtensionDir(dir) + return nil +} diff --git a/imp/import.go b/imp/import.go index 844eef51..055601fa 100644 --- a/imp/import.go +++ b/imp/import.go @@ -161,6 +161,28 @@ func ImportModuleLevel(exec Executor, name, pkgname string, level int) (*objects return mod, nil } + // 3b. Go-implemented C extension (the test-extension registry). CPython + // reaches these through PathFinder -> ExtensionFileLoader after a + // lib-dynload `.so` matches; gopy ports the extension as a Go builtin + // registered by name and builds it via the same create_dynamic compat + // gate, then attaches the ExtensionFileLoader spec so module.__spec__ + // reads like a real extension. + // + // CPython: Python/import.c:2001 import_run_extension + if ext := FindExtModule(absName); ext != nil { + mod, found, eerr := CreateExtModule(absName, ExtensionOrigin(absName)) + if eerr != nil { + return nil, eerr + } + if found { + AddModule(absName, mod) + AttachExtensionSpec(exec, mod, absName, ExtensionOrigin(absName)) + parent, tail := splitParent(absName) + bindOnParent(parent, tail, mod) + return mod, nil + } + } + // 4. Path-based finder (sys.path). // CPython: Lib/importlib/_bootstrap_external.py:1284 PathFinder.find_spec // diff --git a/imp/pathfinder.go b/imp/pathfinder.go index e5d5ff48..2e15320a 100644 --- a/imp/pathfinder.go +++ b/imp/pathfinder.go @@ -962,6 +962,34 @@ type pendingSpec struct { search []string builtin bool namespace bool + extension bool +} + +// AttachExtensionSpec gives a Go-implemented extension module the +// __spec__ / __loader__ / __file__ surface CPython's ExtensionFileLoader +// installs: an ExtensionFileLoader instance as the loader and the +// synthesized lib-dynload path as origin / __file__. test_import's +// require_extension asserts module.__spec__.loader is ExtensionFileLoader, +// so the loader type must be exactly that. +// +// CPython: Lib/importlib/_bootstrap_external.py:1032 ExtensionFileLoader +func AttachExtensionSpec(exec Executor, mod *objects.Module, name, origin string) { + d := mod.Dict() + docKey := objects.NewStr("__doc__") + if _, err := d.GetItem(docKey); err != nil { + _ = d.SetItem(docKey, objects.None()) + } + _ = d.SetItem(objects.NewStr("__file__"), objects.NewStr(origin)) + p := pendingSpec{mod: mod, name: name, origin: origin, extension: true} + util, ok := ensureImportlibUtil(exec) + if !ok { + pendingMu.Lock() + pendingSpecs = append(pendingSpecs, p) + pendingMu.Unlock() + return + } + applySpec(util, p) + flushPendingSpecs(util) } var ( @@ -1044,11 +1072,47 @@ func buildSpec(util *objects.Module, p pendingSpec) objects.Object { return buildNamespaceSpec(p) case p.builtin: return buildBuiltinSpec(util, p) + case p.extension: + return buildExtensionSpec(util, p) default: return buildFileSpec(util, p) } } +// buildExtensionSpec builds a spec whose loader is an ExtensionFileLoader +// instance, mirroring the spec PathFinder produces for a compiled +// extension. spec_from_file_location with an explicit loader keeps the +// loader type exactly ExtensionFileLoader and records origin as __file__. +// +// CPython: Lib/importlib/_bootstrap_external.py:1546 ExtensionFileLoader path hook +func buildExtensionSpec(util *objects.Module, p pendingSpec) objects.Object { + machinery, ok := GetModule("importlib.machinery") + if !ok { + return nil + } + loaderCls, err := machinery.Dict().GetItem(objects.NewStr("ExtensionFileLoader")) + if err != nil || loaderCls == nil { + return nil + } + loader, lerr := objects.Call(loaderCls, + objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.NewStr(p.origin)}), nil) + if lerr != nil { + return nil + } + fn, err := util.Dict().GetItem(objects.NewStr("spec_from_file_location")) + if err != nil { + return nil + } + kwargs := objects.NewDict() + _ = kwargs.SetItem(objects.NewStr("loader"), loader) + args := objects.NewTuple([]objects.Object{objects.NewStr(p.name), objects.NewStr(p.origin)}) + spec, cerr := objects.Call(fn, args, kwargs) + if cerr != nil || spec == objects.None() { + return nil + } + return spec +} + // buildNamespaceSpec builds a PEP 420 namespace spec: loader None, origin // None, the portions as submodule_search_locations. machinery.ModuleSpec is // the faithful constructor; util re-exports it. diff --git a/module/_imp/module.go b/module/_imp/module.go index 41ed44e6..d1fc26c1 100644 --- a/module/_imp/module.go +++ b/module/_imp/module.go @@ -102,7 +102,12 @@ func buildModule() (*objects.Module, error) { // CPython: Python/import.c:4807 _imp_extension_suffixes_impl if err := d.SetItem(objects.NewStr("extension_suffixes"), objects.NewBuiltinFunction("extension_suffixes", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { - return objects.NewList(nil), nil + suffixes := imp.ExtensionSuffixes() + items := make([]objects.Object, len(suffixes)) + for i, s := range suffixes { + items[i] = objects.NewStr(s) + } + return objects.NewList(items), nil })); err != nil { return nil, err } @@ -152,7 +157,10 @@ func buildModule() (*objects.Module, error) { } if err := d.SetItem(objects.NewStr("exec_dynamic"), objects.NewBuiltinFunction("exec_dynamic", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { - return nil, fmt.Errorf("ImportError: gopy does not support dynamic (C extension) module loading") + // gopy's create_dynamic already ran the module's Init (both the + // PEP 489 create and exec phases), so exec_dynamic is a no-op that + // reports success with 0, matching the C impl's return value. + return objects.NewInt(0), nil })); err != nil { return nil, err } @@ -183,8 +191,12 @@ func buildModule() (*objects.Module, error) { return nil, err } if err := d.SetItem(objects.NewStr("_override_multi_interp_extensions_check"), - objects.NewBuiltinFunction("_override_multi_interp_extensions_check", func(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { - return objects.NewInt(0), nil + objects.NewBuiltinFunction("_override_multi_interp_extensions_check", func(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + override, err := signedIntArg(args, "_override_multi_interp_extensions_check") + if err != nil { + return nil, err + } + return objects.NewInt(int64(imp.SetMultiInterpOverride(override))), nil })); err != nil { return nil, err } @@ -386,6 +398,7 @@ func createDynamic(args []objects.Object, _ map[string]objects.Object) (objects. if err != nil { return nil, err } + origin := "" if !objects.IsNone(originObj) { originStr, ok := originObj.(*objects.Unicode) if !ok { @@ -394,6 +407,20 @@ func createDynamic(args []objects.Object, _ map[string]objects.Object) (objects. if err := checkEmbeddedNull(originStr.Value()); err != nil { return nil, err } + origin = originStr.Value() + } + + // gopy compiles its extension modules into the runtime as Go builtins + // rather than dlopening a shared object. When the spec names a + // registered extension, run its Init (the create+exec phases) behind the + // PEP 489 multiple-interpreters compat check; otherwise fall back to the + // "cannot load a C extension" ImportError. + mod, found, err := imp.CreateExtModule(nameStr.Value(), origin) + if err != nil { + return nil, err + } + if found { + return mod, nil } return nil, fmt.Errorf("ImportError: gopy does not support dynamic (C extension) module loading") diff --git a/module/_interpreters/module.go b/module/_interpreters/module.go index 3ec1432d..ee6049ec 100644 --- a/module/_interpreters/module.go +++ b/module/_interpreters/module.go @@ -67,11 +67,20 @@ type interp struct { whence int refs int64 ns *objects.Dict + // ownGil and checkMulti capture the PyInterpreterConfig the interpreter + // was created with: whether it runs with its own GIL and whether it + // enforces the subinterpreter-incompatible-extension check. The default + // _PyInterpreterConfig_INIT (isolated) sets both, so a bare create() + // produces an interpreter that rejects single-phase extension imports. + // + // CPython: Include/cpython/pylifecycle.h:52 _PyInterpreterConfig_INIT + ownGil bool + checkMulti bool } var ( mu sync.Mutex - registry = map[int64]*interp{} + registry = map[int64]*interp{} nextID int64 = 1 ) @@ -114,17 +123,57 @@ func argInt(args []objects.Object, i int) (int64, error) { // create allocates a new interpreter and returns its id. // // CPython: Modules/_interpretersmodule.c:768 interp_create -func create(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { +func create(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + // The optional config selects the interpreter's isolation. The default + // (_PyInterpreterConfig_INIT) is fully isolated: its own GIL and the + // multi-interpreter extension check enabled. A "legacy" named config or + // an explicit object can relax that. + // + // CPython: Modules/_interpretersmodule.c:404 config_from_object + ownGil, checkMulti := true, true + if len(args) >= 1 && !objects.IsNone(args[0]) { + ownGil, checkMulti = configFromObject(args[0]) + } mu.Lock() defer mu.Unlock() id := nextID nextID++ ns := objects.NewDict() _ = ns.SetItem(objects.NewStr("__name__"), objects.NewStr("__main__")) - registry[id] = &interp{id: id, whence: whenceStdlib, refs: 0, ns: ns} + registry[id] = &interp{id: id, whence: whenceStdlib, refs: 0, ns: ns, ownGil: ownGil, checkMulti: checkMulti} return objects.NewInt(id), nil } +// configFromObject reads the (own_gil, check_multi_interp_extensions) pair +// from a create() config argument: a named-config string or an object whose +// attributes mirror PyInterpreterConfig. +// +// CPython: Python/interpconfig.c:262 _PyInterpreterConfig_InitFromDict +func configFromObject(cfg objects.Object) (ownGil, checkMulti bool) { + if name, ok := cfg.(*objects.Unicode); ok { + switch name.Value() { + case "legacy": + return false, false + case "empty": + return false, false + default: // "default", "isolated", "" + return true, true + } + } + ownGil, checkMulti = true, true + if gilObj, err := objects.GetAttr(cfg, objects.NewStr("gil")); err == nil { + if gilStr, ok := gilObj.(*objects.Unicode); ok { + ownGil = gilStr.Value() == "own" + } + } + if checkObj, err := objects.GetAttr(cfg, objects.NewStr("check_multi_interp_extensions")); err == nil { + if t, terr := objects.IsTruthy(checkObj); terr == nil { + checkMulti = t + } + } + return ownGil, checkMulti +} + // destroy finalizes and removes an interpreter. // // CPython: Modules/_interpretersmodule.c:874 interp_destroy @@ -298,6 +347,15 @@ func execCode(args []objects.Object, _ map[string]objects.Object) (objects.Objec // // CPython: Modules/_interpretersmodule.c _PyXI_excinfo func excinfoFor(err error) objects.Object { + // CPython's _run_in_interpreter consumes the script's exception into the + // excinfo snapshot and clears it from the interpreter, so the failure + // does not leak into later operations (a pending exception otherwise + // surfaces during the next generator finalization). Mirror that clear. + // + // CPython: Python/crossinterp.c:1700 _PyXI_excinfo_InitFromException + if objects.ClearCurrentExceptionHook != nil { + objects.ClearCurrentExceptionHook() + } typeName := "Exception" msg := err.Error() if re, ok := err.(*objects.RaisedError); ok { @@ -309,7 +367,15 @@ func excinfoFor(err error) objects.Object { } } ns := objects.NewNamespace() - _ = objects.SetAttr(ns, objects.NewStr("type"), objects.NewStr(typeName)) + // excinfo.type is itself a namespace carrying the exception type's + // __name__/__qualname__/__module__, the shape _PyXI_excinfo_TypeAsObject + // builds so callers can read exc.type.__name__. + // + // CPython: Python/crossinterp.c:1517 _PyXI_excinfo_TypeAsObject + typeNS := objects.NewNamespace() + _ = objects.SetAttr(typeNS, objects.NewStr("__name__"), objects.NewStr(typeName)) + _ = objects.SetAttr(typeNS, objects.NewStr("__qualname__"), objects.NewStr(typeName)) + _ = objects.SetAttr(ns, objects.NewStr("type"), typeNS) _ = objects.SetAttr(ns, objects.NewStr("msg"), objects.NewStr(msg)) formatted := fmt.Sprintf("%s: %s", typeName, msg) _ = objects.SetAttr(ns, objects.NewStr("formatted"), objects.NewStr(formatted)) @@ -317,6 +383,43 @@ func excinfoFor(err error) objects.Object { return ns } +// runString runs a source string in the interpreter's __main__ namespace. +// Like exec it returns None on success or an excinfo namespace on an +// unhandled exception; the high-level caller decides what to do with it. +// +// CPython: Modules/_interpretersmodule.c:1174 interp_run_string +func runString(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + id, err := argInt(args, 0) + if err != nil { + return nil, err + } + if len(args) < 2 { + return nil, fmt.Errorf("TypeError: run_string() missing 'script'") + } + script, ok := args[1].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: run_string() argument 2 must be a string, not %s", args[1].Type().Name) + } + mu.Lock() + it, err := lookup(id) + mu.Unlock() + if err != nil { + return nil, err + } + // A subinterpreter run is a fresh-namespace exec that pushes a non-main + // interpreter state, so the PEP 489 extension compat check and the + // gh-144601 single-phase failure path observe the subinterpreter the + // same way CPython's switched-to-main init does. + // + // CPython: Modules/_interpretersmodule.c:650 _run_in_interpreter + imp.PushSubinterp(it.ownGil, it.checkMulti) + defer imp.PopSubinterp() + if _, err := builtins.Exec([]objects.Object{script, it.ns}, nil); err != nil { + return excinfoFor(err), nil + } + return objects.None(), nil +} + func isShareable(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { // gopy shares object references directly, so everything is shareable. // @@ -361,6 +464,7 @@ func buildModule() (*objects.Module, error) { {"is_running", fn("is_running", isRunning)}, {"set___main___attrs", fn("set___main___attrs", setMainAttrs)}, {"exec", fn("exec", execCode)}, + {"run_string", fn("run_string", runString)}, {"is_shareable", fn("is_shareable", isShareable)}, } for _, e := range entries { diff --git a/module/_testinternalcapi/module.go b/module/_testinternalcapi/module.go index 4e47ef5d..0b616fa1 100644 --- a/module/_testinternalcapi/module.go +++ b/module/_testinternalcapi/module.go @@ -35,6 +35,7 @@ func buildModule() (*objects.Module, error) { {"identify_type_slot_wrappers", identifyTypeSlotWrappers}, {"get_recursion_depth", getRecursionDepth}, {"run_in_subinterp_with_config", runInSubinterpWithConfig}, + {"clear_extension", clearExtension}, } for _, f := range fns { if err := d.SetItem(objects.NewStr(f.name), objects.NewBuiltinFunction(f.name, f.fn)); err != nil { @@ -88,9 +89,65 @@ func runInSubinterpWithConfig(args []objects.Object, _ map[string]objects.Object if !ok { return nil, fmt.Errorf("TypeError: run_in_subinterp_with_config() argument 'code' must be str, not %s", args[0].Type().Name) } + + // gopy cannot spin up a real OS-level subinterpreter, so the run is a + // fresh-namespace exec. The config's gil and check_multi_interp_extensions + // fields are honoured: they are pushed onto the interpreter-state stack + // the PEP 489 extension compat check (imp.CheckExtSubinterpCompat) reads, + // so importing an incompatible extension from the script raises the same + // ImportError CPython's subinterpreter would. own_gil follows + // config.gil == 'own' (the ISOLATED gil=2 case). + // + // CPython: Python/pylifecycle.c:586 init_interp_create_gil (own_gil) + ownGil, checkMulti := false, false + if len(args) >= 2 && !objects.IsNone(args[1]) { + config := args[1] + if gilObj, err := objects.GetAttr(config, objects.NewStr("gil")); err == nil { + if gilStr, ok := gilObj.(*objects.Unicode); ok { + ownGil = gilStr.Value() == "own" + } + } + if checkObj, err := objects.GetAttr(config, objects.NewStr("check_multi_interp_extensions")); err == nil { + if t, terr := objects.IsTruthy(checkObj); terr == nil { + checkMulti = t + } + } + } + + imp.PushSubinterp(ownGil, checkMulti) + defer imp.PopSubinterp() return objects.NewInt(int64(builtins.RunInFreshNamespace(code.Value()))), nil } +// clearExtension ports clear_extension(name, filename): it clears all +// internally cached data for a single-phase extension module so the test +// suite can re-import it fresh. It delegates to _PyImport_ClearExtension. +// +// CPython: Modules/_testinternalcapi.c:893 clear_extension +// +// (Python/import.c:903 _PyImport_ClearExtension) +func clearExtension(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 2 { + return nil, fmt.Errorf("TypeError: clear_extension() takes exactly 2 arguments (%d given)", len(args)) + } + name, ok := args[0].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: clear_extension() argument 1 must be str, not %s", args[0].Type().Name) + } + path := "" + if !objects.IsNone(args[1]) { + filename, ok := args[1].(*objects.Unicode) + if !ok { + return nil, fmt.Errorf("TypeError: clear_extension() argument 2 must be str, not %s", args[1].Type().Name) + } + path = filename.Value() + } + if err := imp.ClearExtension(name.Value(), path); err != nil { + return nil, err + } + return objects.None(), nil +} + // getRecursionDepth returns the Python recursion depth of the caller, // matching tstate->py_recursion_limit - tstate->py_recursion_remaining. // gopy tracks depth by the active interpreter-frame chain, so the count diff --git a/module/_testmultiphase/module.go b/module/_testmultiphase/module.go index d3fe8043..e10b3c44 100644 --- a/module/_testmultiphase/module.go +++ b/module/_testmultiphase/module.go @@ -27,7 +27,39 @@ import ( ) func init() { - _ = imp.AppendInittab("_testmultiphase", buildModule) + // gopy cannot dlopen a compiled extension, so each PyInit_* entry the C + // extension exposes is registered as a gopy extension module keyed by + // name, carrying the PEP 489 Py_mod_multiple_interpreters slot value its + // PyModuleDef declares. _imp.create_dynamic dispatches here and applies + // the subinterpreter compat check before running the body. + // + // CPython: Modules/_testmultiphase.c:438 main_slots (PER_INTERPRETER_GIL) + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testmultiphase", + HasMultiInterpSlot: true, + MultiInterp: imp.MultiInterpPerInterpreterGIL, + Init: func() (*objects.Module, error) { return buildModule("_testmultiphase") }, + }) + // CPython: Modules/_testmultiphase.c:943 non_isolated_slots (NOT_SUPPORTED) + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_test_non_isolated", + HasMultiInterpSlot: true, + MultiInterp: imp.MultiInterpNotSupported, + Init: func() (*objects.Module, error) { return buildModule("_test_non_isolated") }, + }) + // CPython: Modules/_testmultiphase.c:964 shared_gil_only_slots (SUPPORTED, explicit) + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_test_shared_gil_only", + HasMultiInterpSlot: true, + MultiInterp: imp.MultiInterpSupported, + Init: func() (*objects.Module, error) { return buildModule("_test_shared_gil_only") }, + }) + // CPython: Modules/_testmultiphase.c:980 no_multiple_interpreter_slot_slots (no slot) + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_test_no_multiple_interpreter_slot", + HasMultiInterpSlot: false, + Init: func() (*objects.Module, error) { return buildModule("_test_no_multiple_interpreter_slot") }, + }) } // exampleObject backs _testimportexec.Example: a GC type whose attribute @@ -206,8 +238,8 @@ func init() { // // CPython: Modules/_testmultiphase.c:392 execfunc // CPython: Modules/_testmultiphase.c:444 main_def -func buildModule() (*objects.Module, error) { - m := objects.NewModule("_testmultiphase") +func buildModule(name string) (*objects.Module, error) { + m := objects.NewModule(name) d := m.Dict() // CPython: Modules/_testmultiphase.c:374 testexport_methods diff --git a/module/_testsinglephase/module.go b/module/_testsinglephase/module.go new file mode 100644 index 00000000..716efec0 --- /dev/null +++ b/module/_testsinglephase/module.go @@ -0,0 +1,393 @@ +// Package testsinglephase is the gopy port of CPython's +// Modules/_testsinglephase.c, the legacy single-phase-init extension the +// import test suite drives through ExtensionFileLoader. CPython ships one +// compiled .so exposing several PyInit_ entry points; gopy registers each +// one as an extension module keyed by name, carrying the single-phase +// marker and the PyModuleDef m_size the import machinery reads. +// +// The variants mirror the kinds Python/import.c documents: +// - "basic" (_testsinglephase, m_size == -1): no per-module state, a +// process-global initialized_count, cached, reloaded from m_copy. +// - the indirect (_basic_wrapper) and direct (_basic_copy) basic variants. +// - "reinit" (_with_reinit, m_size == 0): re-runs init, no state. +// - "with state" (_with_state, m_size > 0): per-module state, re-runs init. +// - the *_check_cache_first variants: return PyState_FindModule first. +// - _testsinglephase_raise_exception: PyInit raises and returns NULL. +// +// CPython: Modules/_testsinglephase.c:489 init__testsinglephase_basic +package testsinglephase + +import ( + "fmt" + "sync" + "time" + + pyerrors "github.com/tamnd/gopy/errors" + "github.com/tamnd/gopy/imp" + "github.com/tamnd/gopy/objects" +) + +// variant selects how a registered entry stores its module state. +type variant int + +const ( + vBasic variant = iota // m_size == -1, process-global state + vReinit // m_size == 0, no state + vWithState // m_size > 0, per-module state +) + +func init() { + // gopy cannot dlopen the compiled extension, so each PyInit_ entry the C + // module exposes is registered as a single-phase gopy extension module. + // _imp.create_dynamic dispatches here; the single-phase marker drives the + // subinterpreter compat gate and the m_size selects the reload behaviour. + // + // CPython: Modules/_testsinglephase.c:489 _testsinglephase_basic + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase", + SinglePhase: true, + MSize: -1, + Init: func() (*objects.Module, error) { return buildBasic("_testsinglephase") }, + }) + // PyInit__testsinglephase_basic_wrapper just calls PyInit__testsinglephase, + // so it shares the def (and modules_by_index slot) and builds a module + // named "_testsinglephase". + // + // CPython: Modules/_testsinglephase.c:537 PyInit__testsinglephase_basic_wrapper + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase_basic_wrapper", + SinglePhase: true, + MSize: -1, + DefName: "_testsinglephase", + ShareDefWith: "_testsinglephase", + Init: func() (*objects.Module, error) { return buildBasic("_testsinglephase") }, + }) + // PyInit__testsinglephase_basic_copy has its own def but shares the basic + // methods and the process-global state. + // + // CPython: Modules/_testsinglephase.c:544 PyInit__testsinglephase_basic_copy + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase_basic_copy", + SinglePhase: true, + MSize: -1, + Init: func() (*objects.Module, error) { return buildBasic("_testsinglephase_basic_copy") }, + }) + // CPython: Modules/_testsinglephase.c:582 PyInit__testsinglephase_with_reinit + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase_with_reinit", + SinglePhase: true, + MSize: 0, + Init: func() (*objects.Module, error) { return buildStateful("_testsinglephase_with_reinit", vReinit) }, + }) + // CPython: Modules/_testsinglephase.c:659 PyInit__testsinglephase_with_state + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase_with_state", + SinglePhase: true, + MSize: 42, + Init: func() (*objects.Module, error) { return buildStateful("_testsinglephase_with_state", vWithState) }, + }) + // The *_check_cache_first variants return PyState_FindModule(def) before + // creating a fresh module and are never recorded in the extensions cache. + // + // CPython: Modules/_testsinglephase.c:704 _check_cache_first modules + for _, cc := range []struct { + name string + mSize int + }{ + {"_testsinglephase_check_cache_first", -1}, + {"_testsinglephase_with_reinit_check_cache_first", 0}, + {"_testsinglephase_with_state_check_cache_first", 42}, + } { + name := cc.name + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: name, + SinglePhase: true, + MSize: cc.mSize, + CheckCacheFirst: true, + Init: func() (*objects.Module, error) { return buildCheckCacheFirst(name) }, + }) + } + // CPython: Modules/_testsinglephase.c:805 PyInit__testsinglephase_raise_exception + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase_raise_exception", + SinglePhase: true, + MSize: -1, + Init: raiseException, + }) + // _testsinglephase_circular manages its own static cache (a process-global + // pointer) and imports a helper module from PyInit before adding itself to + // sys.modules, the gh-123950 circular-import fixture. Its def leaves m_size + // unset, so it is the reinit (m_size == 0) kind. + // + // CPython: Modules/_testsinglephase.c:780 PyInit__testsinglephase_circular + imp.RegisterExtModule(&imp.ExtModuleDef{ + Name: "_testsinglephase_circular", + SinglePhase: true, + MSize: 0, + Init: buildCircular, + }) +} + +// errorType is the _testsinglephase.error exception the module installs. +// +// CPython: Modules/_testsinglephase.c:303 PyErr_NewException("_testsinglephase.error") +var errorType = pyerrors.NewExcType("_testsinglephase.error", []*objects.Type{pyerrors.PyExc_Exception}) + +// moduleState mirrors the C module_state: the time the state was +// initialized. A zero initialized time means uninitialized. +// +// CPython: Modules/_testsinglephase.c:174 module_state +type moduleState struct { + initialized time.Time +} + +// notInitialized is global_state.initialized_count's sentinel value before +// the basic module is loaded or after _clear_globals. +// +// CPython: Modules/_testsinglephase.c:229 NOT_INITIALIZED +const notInitialized = -1 + +// globalState mirrors the C global_state shared by the basic module and its +// variants across (sub)interpreters: an initialized count and a single +// module_state. +// +// CPython: Modules/_testsinglephase.c:185 global_state +var globalState = struct { + mu sync.Mutex + initializedCount int64 + module moduleState +}{initializedCount: notInitialized} + +func secondsSinceEpoch(t time.Time) float64 { + if t.IsZero() { + return 0 + } + return float64(t.UnixNano()) / 1e9 +} + +// commonSum ports common_sum: sum(i, j) returns i + j. +// +// CPython: Modules/_testsinglephase.c:396 common_sum +func commonSum(args []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + if len(args) != 2 { + return nil, fmt.Errorf("TypeError: sum() takes exactly 2 arguments (%d given)", len(args)) + } + i, ok := args[0].(*objects.Int) + if !ok { + return nil, fmt.Errorf("TypeError: an integer is required (got type %s)", args[0].Type().Name) + } + j, ok := args[1].(*objects.Int) + if !ok { + return nil, fmt.Errorf("TypeError: an integer is required (got type %s)", args[1].Type().Name) + } + iv, _ := i.Int64() + jv, _ := j.Int64() + return objects.NewInt(iv + jv), nil +} + +// raiseException is PyInit__testsinglephase_raise_exception: it sets +// RuntimeError("evil") and returns NULL, the gh-144601 fixture for a +// PyInit that fails. +// +// CPython: Modules/_testsinglephase.c:805 PyInit__testsinglephase_raise_exception +func raiseException() (*objects.Module, error) { + exc := pyerrors.New(pyerrors.PyExc_RuntimeError, objects.NewTuple([]objects.Object{objects.NewStr("evil")})) + return nil, objects.NewRaisedError(exc, "") +} + +// installCommon installs the methods and constants every variant shares: +// look_up_self, sum, state_initialized, plus the error type and the +// int_const / str_const / _module_initialized attributes init_module sets. +// +// CPython: Modules/_testsinglephase.c:325 init_module +func installCommon(m *objects.Module, st *moduleState, hasState bool) error { + d := m.Dict() + methods := []struct { + name string + fn func([]objects.Object, map[string]objects.Object) (objects.Object, error) + }{ + {"look_up_self", func([]objects.Object, map[string]objects.Object) (objects.Object, error) { + return imp.ModuleSelf(m), nil + }}, + {"sum", commonSum}, + {"state_initialized", func([]objects.Object, map[string]objects.Object) (objects.Object, error) { + // common_state_initialized returns None when the module has no + // state (m_size == 0); otherwise the seconds-since-epoch the + // state was initialized (0.0 once cleared). + if !hasState { + return objects.None(), nil + } + return objects.NewFloat(secondsSinceEpoch(st.initialized)), nil + }}, + } + for _, mm := range methods { + if err := d.SetItem(objects.NewStr(mm.name), objects.NewBuiltinFunction(mm.name, mm.fn)); err != nil { + return err + } + } + // CPython: Modules/_testsinglephase.c:303 state->error + if err := d.SetItem(objects.NewStr("error"), errorType); err != nil { + return err + } + // CPython: Modules/_testsinglephase.c:308 state->int_const 1969 + if err := d.SetItem(objects.NewStr("int_const"), objects.NewInt(1969)); err != nil { + return err + } + // CPython: Modules/_testsinglephase.c:313 state->str_const + if err := d.SetItem(objects.NewStr("str_const"), objects.NewStr("something different")); err != nil { + return err + } + // CPython: Modules/_testsinglephase.c:338 _module_initialized + if err := d.SetItem(objects.NewStr("_module_initialized"), objects.NewFloat(secondsSinceEpoch(st.initialized))); err != nil { + return err + } + return nil +} + +// buildBasic ports init__testsinglephase_basic: the basic module shares the +// process-global module_state and bumps the global initialized_count. +// state_initialized reads that shared state, so it returns 0.0 (not None) +// once the globals are cleared. +// +// CPython: Modules/_testsinglephase.c:497 init__testsinglephase_basic +func buildBasic(defName string) (*objects.Module, error) { + globalState.mu.Lock() + if globalState.initializedCount == notInitialized { + globalState.initializedCount = 0 + } + // clear_state then init_state: stamp the global state's initialized time. + globalState.module.initialized = time.Now() + st := globalState.module + globalState.initializedCount++ + globalState.mu.Unlock() + + m := objects.NewModule(defName) + // state_initialized must read the live global state, not a copy, so the + // closure captures &globalState.module. + if err := installCommon(m, &globalState.module, true); err != nil { + return nil, err + } + // Re-stamp _module_initialized from the snapshot taken under the lock so + // it matches state_initialized at load time. + if err := m.Dict().SetItem(objects.NewStr("_module_initialized"), objects.NewFloat(secondsSinceEpoch(st.initialized))); err != nil { + return nil, err + } + d := m.Dict() + if err := d.SetItem(objects.NewStr("initialized_count"), objects.NewBuiltinFunction("initialized_count", basicInitializedCount)); err != nil { + return nil, err + } + if err := d.SetItem(objects.NewStr("_clear_globals"), objects.NewBuiltinFunction("_clear_globals", basicClearGlobals)); err != nil { + return nil, err + } + return m, nil +} + +// basicInitializedCount ports basic_initialized_count. +// +// CPython: Modules/_testsinglephase.c:416 basic_initialized_count +func basicInitializedCount(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + globalState.mu.Lock() + defer globalState.mu.Unlock() + return objects.NewInt(globalState.initializedCount), nil +} + +// basicClearGlobals ports basic__clear_globals -> clear_global_state: it +// clears the shared module_state and resets initialized_count to +// NOT_INITIALIZED (-1). +// +// CPython: Modules/_testsinglephase.c:434 basic__clear_globals +// +// (Modules/_testsinglephase.c:197 clear_global_state) +func basicClearGlobals(_ []objects.Object, _ map[string]objects.Object) (objects.Object, error) { + globalState.mu.Lock() + defer globalState.mu.Unlock() + globalState.module.initialized = time.Time{} + globalState.initializedCount = notInitialized + return objects.None(), nil +} + +// buildStateful ports the with_reinit (m_size == 0) and with_state +// (m_size > 0) variants: each load runs init fresh against a state that is +// not the process-global one. A reinit module has no readable state +// (state_initialized returns None); a with_state module reads its own. +// +// CPython: Modules/_testsinglephase.c:582 / 659 +func buildStateful(name string, v variant) (*objects.Module, error) { + st := &moduleState{initialized: time.Now()} + m := objects.NewModule(name) + hasState := v == vWithState + if err := installCommon(m, st, hasState); err != nil { + return nil, err + } + if v == vWithState { + // _clear_module_state clears the per-module state. + // + // CPython: Modules/_testsinglephase.c:452 basic__clear_module_state + if err := m.Dict().SetItem(objects.NewStr("_clear_module_state"), + objects.NewBuiltinFunction("_clear_module_state", func([]objects.Object, map[string]objects.Object) (objects.Object, error) { + st.initialized = time.Time{} + return objects.None(), nil + })); err != nil { + return nil, err + } + } + return m, nil +} + +// staticModuleCircular mirrors the C static_module_circular pointer: the +// _testsinglephase_circular module caches itself in a process-global so a +// re-entrant PyInit (the circular import) reuses the same partially built +// object. clear_static_var resets it. +// +// CPython: Modules/_testsinglephase.c:758 static_module_circular +var staticModuleCircular *objects.Module + +// circularHelperName is the module PyInit imports before returning, the +// half of the cycle that imports _testsinglephase_circular back again. +// +// CPython: Modules/_testsinglephase.c:788 helper_mod_name +const circularHelperName = "test.test_import.data.circular_imports.singlephase" + +// buildCircular ports PyInit__testsinglephase_circular: it lazily builds the +// module into a static pointer, imports the helper module (which re-imports +// this module before it is in sys.modules), then records helper_mod_name and +// returns the cached object. +// +// CPython: Modules/_testsinglephase.c:780 PyInit__testsinglephase_circular +func buildCircular() (*objects.Module, error) { + if staticModuleCircular == nil { + m := objects.NewModule("_testsinglephase_circular") + // CPython: Modules/_testsinglephase.c:761 circularmod_clear_static_var + if err := m.Dict().SetItem(objects.NewStr("clear_static_var"), + objects.NewBuiltinFunction("clear_static_var", func([]objects.Object, map[string]objects.Object) (objects.Object, error) { + result := staticModuleCircular + staticModuleCircular = nil + if result == nil { + return objects.None(), nil + } + return result, nil + })); err != nil { + return nil, err + } + staticModuleCircular = m + } + if objects.ImportModuleHook == nil { + return nil, fmt.Errorf("ImportError: import machinery unavailable") + } + if _, err := objects.ImportModuleHook(circularHelperName); err != nil { + return nil, err + } + // CPython: Modules/_testsinglephase.c:795 PyModule_AddStringConstant + if err := staticModuleCircular.Dict().SetItem(objects.NewStr("helper_mod_name"), objects.NewStr(circularHelperName)); err != nil { + return nil, err + } + return staticModuleCircular, nil +} + +// buildCheckCacheFirst ports the *_check_cache_first PyInit functions, which +// only ever load fresh: a bare module carrying its own name. +// +// CPython: Modules/_testsinglephase.c:704 _check_cache_first modules +func buildCheckCacheFirst(name string) (*objects.Module, error) { + return objects.NewModule(name), nil +} diff --git a/stdlibinit/registry.go b/stdlibinit/registry.go index 51123664..73c67c55 100644 --- a/stdlibinit/registry.go +++ b/stdlibinit/registry.go @@ -181,6 +181,13 @@ import ( // CPython: Modules/_testmultiphase.c:447 PyInit__testmultiphase _ "github.com/tamnd/gopy/module/_testmultiphase" + // Built-in module: _testsinglephase. Registers itself via + // module/_testsinglephase/module.go init(). Reproduces the legacy + // single-phase init extension and the gh-144601 raise-on-init fixture + // the SubinterpImportTests drive through ExtensionFileLoader. + // CPython: Modules/_testsinglephase.c:533 PyInit__testsinglephase + _ "github.com/tamnd/gopy/module/_testsinglephase" + // Built-in module: _json. Registers itself via // module/_json/module.go init(). Accelerates json.py with // scanstring and encode_basestring helpers. diff --git a/vm/copyreg_hook.go b/vm/copyreg_hook.go index a477f5a2..21f46676 100644 --- a/vm/copyreg_hook.go +++ b/vm/copyreg_hook.go @@ -79,6 +79,21 @@ func importModuleByName(name string) (objects.Object, error) { if mod, ok := imp.GetModule(name); ok && mod != nil { return mod, nil } + // PyImport_ImportModule drives the live importlib _gcd_import, which + // recurses parent packages and resolves namespace packages (directories + // with no __init__.py). The Go ImportModule driver below resolves only + // the named module against sys.path and does not import the parents, so + // it misses a deeply dotted namespace submodule. Prefer _gcd_import once + // _frozen_importlib is installed; fall back to the Go driver during early + // bootstrap, before importlib is live. + // + // CPython: Python/import.c:1450 PyImport_ImportModule (_gcd_import) + if frozen, ok := imp.GetModule("_frozen_importlib"); ok && frozen != nil { + gcd, err := objects.GetAttr(frozen, objects.NewStr("_gcd_import")) + if err == nil && gcd != nil { + return objects.Call(gcd, objects.NewTuple([]objects.Object{objects.NewStr(name)}), nil) + } + } ts := currentThread() if ts == nil { ts = state.NewThread() From 7f9337d088449eabe403c29f9726e27e485899c4 Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 18:49:18 +0700 Subject: [PATCH 82/84] import: give each subinterpreter its own view of extension modules A fresh subinterpreter starts with an empty sys.modules, so importing an extension there re-runs the import (firing the PEP 489 compat gate) even when the main interpreter already cached it. gopy shares one sys.modules dict across the synchronous subinterpreter stack, so the compat check never saw the re-import and the singlephase tests all returned 'okay'. PushSubinterp now hides the registered extension entries for the duration of a run and PopSubinterp restores them, and run_in_subinterp pushes a legacy interpreter state so its script re-imports through the cache. Gets the SubinterpImportTests compat checks and the basic_multiple_interpreters snapshots to match CPython. --- imp/extension.go | 61 ++++++++++++++++++++++++++++++++++---- module/_testcapi/module.go | 9 ++++++ 2 files changed, 65 insertions(+), 5 deletions(-) diff --git a/imp/extension.go b/imp/extension.go index cf05b329..941be399 100644 --- a/imp/extension.go +++ b/imp/extension.go @@ -144,6 +144,16 @@ type interpState struct { // // CPython: Include/internal/pycore_interp.h modules_by_index modByIndex map[int]*objects.Module + // hiddenExt holds the registered extension-module sys.modules entries + // this subinterpreter shadowed on entry. CPython gives every interpreter + // its own sys.modules, so a subinterpreter re-imports an extension through + // import_find_extension (firing the compat gate) even when the main + // interpreter already cached it. gopy shares one sys.modules dict, so a + // push removes those entries (forcing the re-import) and the matching pop + // restores them. nil on the main interpreter. + // + // CPython: Include/internal/pycore_interp.h imports.modules + hiddenExt map[string]objects.Object } var ( @@ -169,14 +179,16 @@ func currentInterp() *interpState { // CPython: Python/pylifecycle.c:586 init_interp_create_gil (own_gil) and // Python/interpconfig.c:262 check_multi_interp_extensions feature flag. func PushSubinterp(ownGil, checkMulti bool) { - interpMu.Lock() - nextInterpID++ - interpStack = append(interpStack, &interpState{ + s := &interpState{ ownGil: ownGil, checkMulti: checkMulti, - id: nextInterpID, modByIndex: map[int]*objects.Module{}, - }) + hiddenExt: hideExtModules(), + } + interpMu.Lock() + nextInterpID++ + s.id = nextInterpID + interpStack = append(interpStack, s) interpMu.Unlock() } @@ -184,10 +196,49 @@ func PushSubinterp(ownGil, checkMulti bool) { // interpreter at the bottom of the stack is never popped. func PopSubinterp() { interpMu.Lock() + var popped *interpState if len(interpStack) > 1 { + popped = interpStack[len(interpStack)-1] interpStack = interpStack[:len(interpStack)-1] } interpMu.Unlock() + if popped != nil { + restoreExtModules(popped.hiddenExt) + } +} + +// hideExtModules removes every registered extension module's sys.modules +// entry, returning the removed entries so PopSubinterp can restore them. A +// fresh subinterpreter has an empty sys.modules, so its first `import name` +// of an extension misses and re-runs the import (firing the PEP 489 compat +// gate through import_find_extension) instead of returning the main +// interpreter's cached module. gopy shares the one sys.modules dict, so the +// removal models the per-interpreter cache for the duration of the run. +// +// CPython: Python/import.c:1964 import_find_extension +func hideExtModules() map[string]objects.Object { + hidden := map[string]objects.Object{} + for _, name := range ExtModuleNames() { + if v, ok := GetModuleRaw(name); ok { + hidden[name] = v + RemoveModule(name) + } + } + return hidden +} + +// restoreExtModules undoes hideExtModules when a subinterpreter run ends: it +// drops any extension entry the subinterpreter left behind and reinstates the +// main interpreter's originals, so the shared sys.modules looks untouched. +func restoreExtModules(hidden map[string]objects.Object) { + for _, name := range ExtModuleNames() { + RemoveModule(name) + } + for name, v := range hidden { + sysModulesMu.Lock() + _ = sysModules.SetItem(objects.NewStr(name), v) + sysModulesMu.Unlock() + } } // SetMultiInterpOverride sets the current interpreter's diff --git a/module/_testcapi/module.go b/module/_testcapi/module.go index 15305030..eb712811 100644 --- a/module/_testcapi/module.go +++ b/module/_testcapi/module.go @@ -333,6 +333,15 @@ func runInSubinterp(args []objects.Object, _ map[string]objects.Object) (objects if !ok { return nil, fmt.Errorf("TypeError: run_in_subinterp() argument must be str, not %s", args[0].Type().Name) } + // Py_NewInterpreter builds a legacy subinterpreter: it shares the main + // GIL and leaves check_multi_interp_extensions off, and it has its own + // sys.modules so any extension re-imports through import_find_extension. + // Push that interpreter state for the duration of the run so the script's + // "assert name not in sys.modules" holds and the re-import copies m_copy. + // + // CPython: Modules/_testcapimodule.c:1969 run_in_subinterp (Py_NewInterpreter) + imp.PushSubinterp(false, false) + defer imp.PopSubinterp() return objects.NewInt(int64(builtins.RunInFreshNamespace(code.Value()))), nil } From 360da9b2deb2f38840ca46a1ae2fbe58f885ad3f Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 18:51:18 +0700 Subject: [PATCH 83/84] imp: tighten stub-file perms and fix analogue spelling for the lint gate --- cmd/gopy/main.go | 2 +- imp/extension.go | 14 +++++++------- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/cmd/gopy/main.go b/cmd/gopy/main.go index 2fc0a1ad..24bc26b1 100644 --- a/cmd/gopy/main.go +++ b/cmd/gopy/main.go @@ -274,7 +274,7 @@ func installPathFinder(scriptPath string) { if root := findStdlibRoot(); root != "" { paths = append(paths, root) // Materialize the compiled-in extension modules as stub files in a - // lib-dynload directory and add it to sys.path, the gopy analogue of + // lib-dynload directory and add it to sys.path, the gopy analog of // CPython's /lib-dynload. The real PathFinder -> FileFinder // discovers them by suffix and routes them through ExtensionFileLoader // -> _imp.create_dynamic, so module.__spec__.loader is an diff --git a/imp/extension.go b/imp/extension.go index 941be399..b1c2f4bc 100644 --- a/imp/extension.go +++ b/imp/extension.go @@ -39,7 +39,7 @@ const ( MultiInterpPerInterpreterGIL ) -// ExtModuleDef is gopy's analogue of a C extension's PyModuleDef plus the +// ExtModuleDef is gopy's analog of a C extension's PyModuleDef plus the // PEP 489 slot table the loader reads. Init builds the fully populated // module body (gopy has no separate create / exec phase for builtins, so // the create_dynamic step runs Init and exec_dynamic is a no-op). @@ -72,7 +72,7 @@ type ExtModuleDef struct { DefName string // ShareDefWith names a registered module whose def (and thus its // modules_by_index slot and cached m_copy) this entry reuses, the gopy - // analogue of one init function calling another's. + // analog of one init function calling another's. // // CPython: Python/import.c:960 "two or more modules share a PyModuleDef" ShareDefWith string @@ -319,7 +319,7 @@ func subinterpIncompatible(name string) error { return fmt.Errorf("ImportError: module %s does not support loading in subinterpreters", name) } -// extDef is gopy's analogue of a single PyModuleDef instance: the unit the +// extDef is gopy's analog of a single PyModuleDef instance: the unit the // extensions cache and the modules_by_index table key on. Two registry // entries that share a def (an init function that calls another's) point at // the same extDef, so they share an m_index (PyState_FindModule / look_up_self) @@ -538,7 +538,7 @@ func reloadSinglephase(def *ExtModuleDef, ed *extDef, cached *extCacheValue, nam return mod, true, nil } -// snapshotDict returns a shallow copy of d, the gopy analogue of the m_copy +// snapshotDict returns a shallow copy of d, the gopy analog of the m_copy // the import machinery saves after a basic module is first loaded. // // CPython: Python/import.c:1140 fixup_cached_def (def->m_base.m_copy) @@ -643,7 +643,7 @@ var ( ) // SetExtensionDir records the directory the materialized extension stub -// files live in (the gopy analogue of CPython's lib-dynload). The path +// files live in (the gopy analog of CPython's lib-dynload). The path // finder discovers the stubs there and ExtensionOrigin reports __file__ // against it. func SetExtensionDir(dir string) { @@ -678,7 +678,7 @@ func ExtensionOrigin(name string) string { // CreateExtModule. The stub bytes are never read; the Go registry holds // the actual module body. dir is recorded as the extension dir. func MaterializeExtensions(dir string) error { - if err := os.MkdirAll(dir, 0o755); err != nil { + if err := os.MkdirAll(dir, 0o750); err != nil { return err } suffix := extensionSuffix() @@ -687,7 +687,7 @@ func MaterializeExtensions(dir string) error { if _, err := os.Stat(p); err == nil { continue } - if err := os.WriteFile(p, nil, 0o644); err != nil { + if err := os.WriteFile(p, nil, 0o600); err != nil { return err } } From 7237e3df49c36a7e8971e6e44831aaf42298416d Mon Sep 17 00:00:00 2001 From: Tam Nguyen Date: Tue, 16 Jun 2026 18:52:01 +0700 Subject: [PATCH 84/84] spec 1731: record test_import green and the remaining frozen-importlib skip --- website/docs/specs/1700/1731_modules_imports_panel.md | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/website/docs/specs/1700/1731_modules_imports_panel.md b/website/docs/specs/1700/1731_modules_imports_panel.md index ecb4a5a7..307ce563 100644 --- a/website/docs/specs/1700/1731_modules_imports_panel.md +++ b/website/docs/specs/1700/1731_modules_imports_panel.md @@ -32,7 +32,7 @@ runs all of the non-interpreter files green. | Test | CPython 3.14.5 | gopy (audit 2026-06-16) | | --- | --- | --- | | `test_module/` (dir) | OK | **OK (39 tests)** | -| `test_import/` (dir) | OK | 118 tests; 5 errors (`_testsinglephase`/`_testmultiphase` C-ext subinterp, P7), 16 skipped | +| `test_import/` (dir) | OK | **OK (118 tests, 4 skipped)** — 3 platform skips + `test_frozen_compat` (needs a frozen `_frozen_importlib`, P7) | | `test_importlib/` (dir) | OK | 1346 tests; 2 failures (module-lock GC lifetime, threaded circular import) + 1 error (incomplete multi-phase C-ext), 63 skipped | | `test_modulefinder` | OK | **OK (17 tests)** | | `test_pkg` | OK | **OK (8 tests)** | @@ -108,7 +108,8 @@ CPython 3.14.5 (counts and `-v` lists). - [x] `test_module/` green (39 tests) - [x] P3: frozen `__hello__`/`__phello__` + aliases, frozen override, `sys._stdlib_dir` — `test_frozen` green (3/3) - [x] P4: `test_runpy` green (40 tests) — package-init exception path closed -- [x] P5: `test_import/` runs all 118 tests without the threaded crash — `os.fstat`/`os.isatty` no longer borrow the fd in a finalizer-bearing `os.File`; remaining 5 errors are the `_testmultiphase`/`_testsinglephase` C-extension subinterpreter tests (P7) +- [x] P5: `test_import/` runs all 118 tests without the threaded crash — `os.fstat`/`os.isatty` no longer borrow the fd in a finalizer-bearing `os.File` +- [x] P5: `test_import/` green — ported the single-phase extension cache (`_testsinglephase*` variants, `m_size` kinds, the extensions cache + `m_copy` reload), the gh-123950 circular import (`_testsinglephase_circular` via the `_gcd_import` import hook), and per-subinterpreter `sys.modules` isolation so the PEP 489 compat gate fires on re-import. 4 skips remain: 3 platform-specific, plus `test_frozen_compat`, which needs a frozen `_frozen_importlib` (P7) - [x] P5: `test_module_with_large_stack` no longer flakes with `bad file descriptor` — `os.NewFile`/`os.OpenFile` arm the close finalizer on the unexported inner `*os.file`, so `SetFinalizer(f, nil)` on the outer handle was a no-op. A leaked borrowed-fd wrapper (subprocess pipes) would close a reused descriptor mid-write. `objects.ClearOSFileFinalizer` reaches the inner pointer; the `io` and `_posixsubprocess` borrows route through it - [x] P5: re-audit `test_module/` — green (39 tests) - [ ] P5: `test_importlib/` residuals — 1346 tests run, down to 2 failures + 1 error. The error