Move from Poetry to uv

.github/dependabot.yml

@@ -3,7 +3,7 @@
 
 version: 2
 updates:
-  # Monitor pip dependencies (Poetry uses pip under the hood)
+  # Monitor pip dependencies (uv uses pip under the hood)
   - package-ecosystem: "pip"
     directory: "/"
     schedule:

.github/workflows/action.yml

@@ -7,30 +7,26 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ["3.11", "3.12", "3.13"]
-        poetry-version: ["2.3.1"]
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/setup-python@v6
+      - name: Install uv
+        uses: astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Install poetry
-        run: pip install poetry==${{ matrix.poetry-version }}
-      - name: View poetry --help
-        run: poetry --help
-      - name: Run poetry install
-        run: poetry install
+      - name: Install dependencies
+        run: uv sync
       - name: lint
-        run: poetry run ruff check .
+        run: uv run ruff check .
       - name: format check
-        run: poetry run black --check .
+        run: uv run black --check .
       - name: sort-check
-        run: poetry run isort --check-only .
+        run: uv run isort --check-only .
       - name: typecheck
-        run: poetry run mypy l9format
+        run: uv run mypy l9format
       - name: test
-        run: poetry run pytest
+        run: uv run pytest
       - name: security-audit
-        run: poetry run pip-audit
+        run: uv run pip-audit
 

.gitignore

@@ -129,4 +129,4 @@ dmypy.json
 .pyre/
 
 .idea
-poetry.lock
+uv.lock

CHANGELOG.md

@@ -14,6 +14,9 @@ and this project adheres to
 - Bump ruff dev dependency from `^0.14.14` to `>=0.14.14,<0.16.0` ([ac8a1db], [#50])
 - Bump isort dev dependency from `^7.0.0` to `>=7,<9` to allow isort 8.x
   ([4464bfd], [#51])
+- Migrate from Poetry to uv: update `pyproject.toml` to PEP 621 format with
+  `hatchling` build backend, replace `poetry run` with `uv run` in Makefile,
+  and switch CI to `astral-sh/setup-uv` ([5f4fc51], [#56])
 
 ## [1.4.0] - 2026-02-09
 
@@ -161,6 +164,7 @@ and this project adheres to
 <!-- Commit links -->
 
 [6c9eecd]: https://github.com/LeakIX/l9format-python/commit/6c9eecd
+[5f4fc51]: https://github.com/LeakIX/l9format-python/commit/5f4fc51
 [ac8a1db]: https://github.com/LeakIX/l9format-python/commit/ac8a1db
 [4464bfd]: https://github.com/LeakIX/l9format-python/commit/4464bfd
 [ac4744e]: https://github.com/LeakIX/l9format-python/commit/ac4744e
@@ -248,5 +252,6 @@ and this project adheres to
 [#32]: https://github.com/LeakIX/l9format-python/issues/32
 [#49]: https://github.com/LeakIX/l9format-python/pull/49
 [#50]: https://github.com/LeakIX/l9format-python/pull/50
-[#43]: https://github.com/LeakIX/l9format-python/issues/43
 [#51]: https://github.com/LeakIX/l9format-python/pull/51
+[#56]: https://github.com/LeakIX/l9format-python/pull/56
+[#43]: https://github.com/LeakIX/l9format-python/issues/43

Makefile

@@ -1,6 +1,6 @@
 # Makefile for l9format-python project
 
-VERSION := $(shell poetry version -s)
+VERSION := $(shell python -c "import tomllib; print(tomllib.load(open('pyproject.toml', 'rb'))['project']['version'])")
 
 UNAME_S := $(shell uname -s)
 ifeq ($(UNAME_S),Darwin)
@@ -24,43 +24,43 @@ all: format sort lint typecheck test security-check ## Run all quality checks
 
 .PHONY: test
 test: ## Run tests using pytest
-	poetry run pytest
+	uv run pytest
 
 .PHONY: format
 format: ## Format code using black
-	poetry run black .
+	uv run black .
 
 .PHONY: check-format
 check-format: ## Check code formatting with black
-	poetry run black --check .
+	uv run black --check .
 
 .PHONY: sort
 sort: ## Sort imports using isort
-	poetry run isort .
+	uv run isort .
 
 .PHONY: check-sort
 check-sort: ## Check import sorting with isort
-	poetry run isort --check-only .
+	uv run isort --check-only .
 
 .PHONY: lint
 lint: ## Lint code using ruff
-	poetry run ruff check .
+	uv run ruff check .
 
 .PHONY: lint-fix
 lint-fix: ## Lint and fix code using ruff
-	poetry run ruff check --fix .
+	uv run ruff check --fix .
 
 .PHONY: lint-shell
 lint-shell: ## Lint shell scripts using shellcheck
 	shellcheck .github/scripts/*.sh
 
 .PHONY: typecheck
 typecheck: ## Run mypy type checker
-	poetry run mypy l9format
+	uv run mypy l9format
 
 .PHONY: security-check
 security-check: ## Check for vulnerable dependencies using pip-audit
-	poetry run pip-audit
+	uv run pip-audit
 
 .PHONY: fix-trailing-whitespace
 fix-trailing-whitespace: ## Remove trailing whitespaces from all files
@@ -97,12 +97,12 @@ check-trailing-whitespace: ## Check for trailing whitespaces in source files
 	fi
 
 .PHONY: install
-install: ## Install dependencies with Poetry
-	poetry install
+install: ## Install dependencies with uv
+	uv sync
 
 .PHONY: build
 build: clean-dist ## Build package for distribution
-	poetry build
+	uv build
 
 .PHONY: publish-dry-run
 publish-dry-run: build ## Dry-run: show what would be published
@@ -111,11 +111,11 @@ publish-dry-run: build ## Dry-run: show what would be published
 	@echo "Would create GitHub release: v$(VERSION)"
 	@echo "Package contents:"
 	@ls -lh dist/
-	poetry publish --dry-run
+	uv publish --dry-run
 
 .PHONY: publish
 publish: build ## Publish to PyPI, tag and create GitHub release
-	poetry publish
+	uv publish
 	git tag -a "v$(VERSION)" -m "Release v$(VERSION)"
 	git push origin "v$(VERSION)"
 	gh release create "v$(VERSION)" dist/* \

pyproject.toml

@@ -1,34 +1,36 @@
-[tool.poetry]
+[project]
 name = "l9format"
 version = "1.4.0"
-license = "MIT"
+license = {text = "MIT"}
 description = "l9format is a schema declaration targeted at interoperability between network recon tools used at LeakIX"
-authors = ["Danny Willems <danny@leakix.net>"]
-maintainers = ["Danny Willems <danny@leakix.net>"]
+authors = [{name = "Danny Willems", email = "danny@leakix.net"}]
+maintainers = [{name = "Danny Willems", email = "danny@leakix.net"}]
 readme = "README.md"
-homepage = "https://github.com/leakix/l9format-python"
-repository = "https://github.com/leakix/l9format-python"
-documentation = "https://github.com/leakix/l9format-python"
-
-[tool.poetry.dependencies]
-python = "^3.11"
-serde = "^0.9.0"
-
-[tool.poetry.group.dev.dependencies]
-black = "^26.1.0"
-fire = "^0.7.1"
-isort = ">=7,<9"
-mypy = "^1.19.0"
-pip-audit = "^2.10.0"
-pytest = "^9.0.2"
-ruff = ">=0.14.14,<0.16.0"
+requires-python = ">=3.11"
+dependencies = [
+    "serde>=0.9.0",
+]
+
+[project.urls]
+Homepage = "https://github.com/leakix/l9format-python"
+Repository = "https://github.com/leakix/l9format-python"
+Documentation = "https://github.com/leakix/l9format-python"
+"Bug Tracker" = "https://github.com/leakix/l9format-python/issues"
 
-[build-system]
-requires = ["poetry-core>=1.0.0"]
-build-backend = "poetry.core.masonry.api"
+[dependency-groups]
+dev = [
+    "black>=26.1.0",
+    "fire>=0.7.1",
+    "isort>=7,<9",
+    "mypy>=1.19.0",
+    "pip-audit>=2.10.0",
+    "pytest>=9.0.2",
+    "ruff>=0.14.14,<0.16.0",
+]
 
-[tool.poetry.urls]
-"Bug Tracker" = "https://github.com/leakix/l9format-python/issues"
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
 
 [tool.ruff]
 line-length = 80