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| 1 | +"""Command-line interface: read a compose document and emit the pod script.""" |
| 2 | + |
| 3 | +import argparse |
| 4 | +import contextlib |
| 5 | +import json |
| 6 | +import re |
| 7 | +import sys |
| 8 | +from pathlib import Path |
| 9 | +from types import ModuleType |
| 10 | +from typing import Any |
| 11 | + |
| 12 | +from compose2pod.emit import EmitOptions, emit_script |
| 13 | +from compose2pod.exceptions import UnsupportedComposeError |
| 14 | +from compose2pod.parsing import validate |
| 15 | + |
| 16 | + |
| 17 | +_yaml: ModuleType | None = None |
| 18 | +with contextlib.suppress(ImportError): # the optional [yaml] extra is not installed |
| 19 | + import yaml as _yaml |
| 20 | + |
| 21 | + |
| 22 | +POD_NAME_PATTERN = re.compile(r"^[A-Za-z0-9][A-Za-z0-9_.-]*$") |
| 23 | + |
| 24 | + |
| 25 | +def _load_yaml(text: str) -> Any: # noqa: ANN401 - returns arbitrary parsed compose data |
| 26 | + if _yaml is None: |
| 27 | + msg = "YAML input requires the 'yaml' extra: pip install compose2pod[yaml] (or pipe JSON via yq)" |
| 28 | + raise UnsupportedComposeError(msg) |
| 29 | + try: |
| 30 | + return _yaml.safe_load(text) |
| 31 | + except _yaml.YAMLError as error: |
| 32 | + msg = f"invalid YAML: {error}" |
| 33 | + raise UnsupportedComposeError(msg) from error |
| 34 | + |
| 35 | + |
| 36 | +def _read_compose(text: str, fmt: str) -> Any: # noqa: ANN401 - returns arbitrary parsed compose data |
| 37 | + if fmt == "json": |
| 38 | + return json.loads(text) |
| 39 | + if fmt == "yaml": |
| 40 | + return _load_yaml(text) |
| 41 | + try: |
| 42 | + return json.loads(text) |
| 43 | + except json.JSONDecodeError: |
| 44 | + return _load_yaml(text) |
| 45 | + |
| 46 | + |
| 47 | +def main(argv: list[str] | None = None) -> int: |
| 48 | + parser = argparse.ArgumentParser( |
| 49 | + prog="compose2pod", |
| 50 | + description="Convert a Docker Compose document to a podman-pod run script (stdout).", |
| 51 | + ) |
| 52 | + parser.add_argument("file", nargs="?", help="compose file to read (default: stdin)") |
| 53 | + parser.add_argument("--target", required=True, help="service to run in the foreground with --command") |
| 54 | + parser.add_argument("--image", required=True, help="CI image replacing services that have a build section") |
| 55 | + parser.add_argument("--project-dir", default=".", help="host path relative volume/env_file sources resolve to") |
| 56 | + parser.add_argument("--command", default="", help="shell command overriding the target service command") |
| 57 | + parser.add_argument("--pod-name", default="test-pod") |
| 58 | + parser.add_argument("--format", choices=("auto", "json", "yaml"), default="auto") |
| 59 | + parser.add_argument( |
| 60 | + "--artifact", |
| 61 | + action="append", |
| 62 | + default=[], |
| 63 | + metavar="SRC:DST", |
| 64 | + help="file to podman-cp out of the target container after it exits", |
| 65 | + ) |
| 66 | + parser.add_argument( |
| 67 | + "--allow-exit-code", |
| 68 | + type=int, |
| 69 | + action="append", |
| 70 | + default=[], |
| 71 | + help="target exit code treated as success in addition to 0", |
| 72 | + ) |
| 73 | + args = parser.parse_args(argv) |
| 74 | + if not POD_NAME_PATTERN.match(args.pod_name): |
| 75 | + sys.stderr.write(f"compose2pod: error: invalid pod name {args.pod_name!r}\n") |
| 76 | + return 2 |
| 77 | + if args.file: |
| 78 | + try: |
| 79 | + text = Path(args.file).read_text() |
| 80 | + except OSError as error: |
| 81 | + sys.stderr.write(f"compose2pod: error: could not read file: {error}\n") |
| 82 | + return 2 |
| 83 | + else: |
| 84 | + text = sys.stdin.read() |
| 85 | + try: |
| 86 | + compose = _read_compose(text, args.format) |
| 87 | + except (json.JSONDecodeError, UnsupportedComposeError) as error: |
| 88 | + sys.stderr.write(f"compose2pod: error: could not parse compose input: {error}\n") |
| 89 | + return 2 |
| 90 | + try: |
| 91 | + warnings = validate(compose) |
| 92 | + script = emit_script( |
| 93 | + compose=compose, |
| 94 | + options=EmitOptions( |
| 95 | + target=args.target, |
| 96 | + ci_image=args.image, |
| 97 | + command=args.command, |
| 98 | + pod=args.pod_name, |
| 99 | + project_dir=args.project_dir, |
| 100 | + artifacts=args.artifact, |
| 101 | + allow_exit_codes=args.allow_exit_code, |
| 102 | + ), |
| 103 | + ) |
| 104 | + except UnsupportedComposeError as error: |
| 105 | + sys.stderr.write(f"compose2pod: error: {error}\n") |
| 106 | + return 2 |
| 107 | + for warning in warnings: |
| 108 | + sys.stderr.write(f"compose2pod: {warning}\n") |
| 109 | + sys.stdout.write(script) |
| 110 | + return 0 |
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