refactor: Trim tox configuration

- Run mypy through pre-commit
- Run Python test workflow through uv
- Use Python dependency groups standard

Author: kieran-ryan

.github/workflows/test-python.yml

@@ -21,32 +21,33 @@ on:
 
 jobs:
   build:
-
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
         include:
-          # Test latest python on Windows / macOS
+          # Test latest python on Windows and macOS
           - { os: 'windows-latest', python-version: '3.13' }
           - { os: 'macos-latest', python-version: '3.13' }
         os: ['ubuntu-latest']
         python-version: ['3.9', '3.10', '3.11', '3.12', '3.13', 'pypy3.9', 'pypy3.10']
-
+    defaults:
+      run:
+        working-directory: python
     steps:
       - uses: actions/checkout@v5
-      - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v6
+
+      - name: Install uv and set the python version
+        uses: astral-sh/setup-uv@v6
         with:
+          enable-cache: true
           python-version: ${{ matrix.python-version }}
-      - name: Install dependencies
-        run: |
-          python -m pip install --upgrade pip
-          pip install tox tox-gh-actions codecov
-      - name: Test with tox
-        working-directory: ./python
-        run: |
-          tox
+          version: "0.8.17"
+
+      - name: Linting and testing
+        run: uv run tox -e="lint,${{ matrix.python-version }}"
+
       - name: Gather codecov report
-        working-directory: ./python
-        run: |
-          codecov
+        run: uvx codecov
+
+      - name: Build package
+        run: uv build

python/pyproject.toml

@@ -2,6 +2,15 @@
 build-backend = "uv_build"
 requires = ["uv_build>=0.8.4,<0.9.0"]
 
+[dependency-groups]
+dev = [
+  "coverage>=7.2",
+  "pytest>=6.1",
+  "GitPython",
+  "packaging",
+  "tox>=4.22"
+]
+
 [project]
 authors = [
   {name = "Cucumber Limited", email = "[email protected]"}
@@ -37,20 +46,6 @@ readme = "README.md"
 requires-python = ">=3.9"
 version = "29.0.1"
 
-[project.optional-dependencies]
-test = [
-  # local
-  "cucumber-messages[test-coverage]",
-  # external; Must be in sync with [tool.tox]
-  "tox>=4.2"
-]
-test-coverage = [
-  "coverage",
-  "GitPython",
-  "packaging",
-  "pytest"
-]
-
 [project.urls]
 Changelog = "https://github.com/cucumber/messages/releases"
 Download = "https://pypi.org/project/cucumber-messages"
@@ -88,46 +83,17 @@ extend-select = [
 # TODO: Evaluate whether to use wildcard (removing need for updates) or explicit imports
 "src/cucumber_messages/__init__.py" = ["F403"]
 
-# Once https://github.com/tox-dev/tox/issues/999 is released and available, migrate to the new tox approach
 [tool.tox]
-# language=INI
-legacy_tox_ini = """
-[tox]
-requires =
-    tox>=4.2
-env_list =
-    py{313, 312, 311, 310, 39}-lint-lin
-    py{py310, py39, 313, 312, 311, 310, 39}-pytest-coverage-lin
-    py313-pytest-coverage-{win, mac}
-distshare = {homedir}/.tox/distshare
+env_list = ["lint", "3.13", "3.12", "3.11", "3.10", "3.9", "pypy310", "pypy39"]
+requires = ["tox>=4.22"]
 
-[testenv]
-platform =
-    lin: linux
-    mac: darwin
-    win: win32
+[tool.tox.env.lint]
+commands = [["pre-commit", "run", "--all-files", "--show-diff-on-failure"]]
+deps = ["pre-commit-uv>=4.1.1"]
+description = "Run linting and formatting checks (and auto-fixes)"
 
-[testenv:py{313, 312, 311, 310, 39}-lint-lin]
-skip_install = true
-description = run code formatter and linter (auto-fix)
-deps =
-    pre-commit-uv>=4.1.1
-commands =
-    pre-commit run --all-files --show-diff-on-failure
-
-[testenv:py{py310, py39, 313, 312, 311, 310, 39}-pytest-coverage-{lin, win, mac}]
-deps =
-    .[test-coverage]
-commands =
-    coverage run --append -m pytest -vvl
-
-[gh-actions]
-python =
-    3.9: py39
-    3.10: py310
-    3.11: py311
-    3.12: py312
-    3.13: py313
-    pypy-3.9: pypy39
-    pypy-3.10: pypy310
-"""
+[tool.tox.env_run_base]
+commands = [["coverage", "run", "--append", "-m", "pytest", "-vvl"]]
+dependency_groups = [
+  "dev"
+]