experiment: use uv and dependency-groups in build pipelines

This is an experimental change to modernize the build infrastructure:

- Add uv.lock for reproducible dependency resolution
- Migrate from optional-dependencies to dependency-groups (PEP 735)
- Configure tox to use tox-uv for faster dependency installation
- Update all GitHub Actions workflows to install tox-uv
- Update minimum version pins to sensible modern values:
  - iniconfig>=2, packaging>=24, pygments>=2.15, tomli>=2
  - attrs>=23.1, hypothesis>=6.75, numpy>=1.26, pytest-xdist>=3.5
  - coverage>=7.5, pexpect>=4.9, pre-commit>=4
- Remove py library from dev deps (pytest vendors its own minimal version)

Usage:
  uv sync --group dev    # Install with dev dependencies
  uv run pytest          # Run tests
  uvx --with tox-uv tox  # Run tox with uv backend

Co-authored-by: Cursor AI <ai@cursor.sh>
Co-authored-by: Anthropic Claude <claude@anthropic.com>

Author: 3 people

.github/workflows/deploy.yml

@@ -55,7 +55,7 @@ jobs:
     - name: Install tox
       run: |
         python -m pip install --upgrade pip
-        pip install tox
+        pip install tox tox-uv
 
     - name: Generate release notes
       env:

.github/workflows/doc-check-links.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Install tox
         run: |
           python -m pip install --upgrade pip
-          pip install tox
+          pip install tox tox-uv
 
       - name: Run sphinx linkcheck via tox
         run: tox -e docs-checklinks

.github/workflows/prepare-release-pr.yml

@@ -41,7 +41,7 @@ jobs:
     - name: Install tox
       run: |
         python -m pip install --upgrade pip
-        pip install tox
+        pip install tox tox-uv
 
     - name: Prepare release PR (minor/patch release)
       if: github.event.inputs.major == 'no'

.github/workflows/test.yml

@@ -291,7 +291,7 @@ jobs:
     - name: Install tox
       run: |
         python -m pip install --upgrade pip
-        pip install tox
+        pip install tox tox-uv
 
     - name: Test without coverage
       if: "! matrix.use_coverage"

.github/workflows/update-plugin-list.yml

@@ -51,7 +51,7 @@ jobs:
       - name: Install tox
         run: |
           python -m pip install --upgrade pip
-          pip install tox
+          pip install tox tox-uv
 
       - name: Update Plugin List
         run: tox -e update-plugin-list

pyproject.toml

@@ -49,16 +49,16 @@ dynamic = [
 dependencies = [
     "colorama>=0.4; sys_platform=='win32'",
     "exceptiongroup>=1; python_version<'3.11'",
-    "iniconfig>=1.0.1",
-    "packaging>=22",
+    "iniconfig>=2",
+    "packaging>=24",
     "pluggy>=1.5,<2",
-    "pygments>=2.7.2",
-    "tomli>=1; python_version<'3.11'",
+    "pygments>=2.15",
+    "tomli>=2; python_version<'3.11'",
 ]
 optional-dependencies.dev = [
     "argcomplete",
-    "attrs>=19.2",
-    "hypothesis>=3.56",
+    "attrs>=23.1",
+    "hypothesis>=6.75",
     "mock",
     "requests",
     "setuptools",
@@ -73,6 +73,26 @@ urls.Tracker = "https://github.com/pytest-dev/pytest/issues"
 scripts."py.test" = "_pytest.config:_console_main"
 scripts.pytest = "_pytest.config:_console_main"
 
+[dependency-groups]
+dev = [
+    # Core test dependencies
+    "argcomplete",
+    "asynctest; python_version<'3.11'",
+    "attrs>=23.1",
+    # Test execution and coverage
+    "coverage>=7.5",
+    "hypothesis>=6.75",
+    "mock",
+    "numpy>=1.26",
+    "pexpect>=4.9",
+    "pytest-xdist>=3.5",
+    # Additional test dependencies
+    "pyyaml",
+    "requests",
+    "setuptools",
+    "xmlschema",
+]
+
 [tool.setuptools.package-data]
 "_pytest" = [
     "py.typed",

tox.ini

@@ -1,6 +1,7 @@
 [tox]
 requires =
     tox >= 4
+    tox-uv >= 1.25
 envlist =
     linting
     py310
@@ -98,19 +99,13 @@ setenv =
     lsof: _PYTEST_TOX_POSARGS_LSOF=--lsof
 
     xdist: _PYTEST_TOX_POSARGS_XDIST=-n auto
-extras = dev
+dependency_groups = dev
 deps =
-    coverage: coverage>=7.10
-    doctesting: PyYAML
-    exceptiongroup: exceptiongroup>=1.0.0rc8
-    numpy: numpy>=1.19.4
-    pexpect: pexpect>=4.8.0
+    exceptiongroup: exceptiongroup>=1.2
     pluggymain: pluggy @ git+https://github.com/pytest-dev/pluggy.git
-    pylib: py>=1.8.2
+    pylib: py>=1.11
     twisted24: twisted<25
     twisted25: twisted>=25
-    asynctest: asynctest
-    xdist: pytest-xdist>=2.1.0
 # Can use the same wheel for all environments.
 package = wheel
 wheel_build_env = .pkg
@@ -119,7 +114,8 @@ wheel_build_env = .pkg
 description =
     run pre-commit-defined linters under `{basepython}`
 skip_install = True
-deps = pre-commit>=2.9.3
+dependency_groups =
+deps = pre-commit>=4
 commands = pre-commit run --all-files --show-diff-on-failure {posargs:}
 setenv =
     # pre-commit and tools it launches are not clean of this warning.
@@ -131,6 +127,7 @@ description =
     `{toxinidir}{/}doc{/}en{/}_build{/}html` with `{basepython}`
 basepython = python3.14 # Sync with .readthedocs.yaml to get errors.
 usedevelop = True
+dependency_groups =
 deps =
     -r{toxinidir}/doc/en/requirements.txt
 commands =
@@ -148,6 +145,7 @@ description =
     check the links in the documentation with `{basepython}`
 usedevelop = True
 changedir = doc/en
+dependency_groups =
 deps = -r{toxinidir}/doc/en/requirements.txt
 commands =
     sphinx-build -W -q --keep-going -b linkcheck . _build
@@ -159,6 +157,7 @@ setenv =
 description =
     regenerate documentation examples under `{basepython}`
 changedir = doc/en
+dependency_groups =
 deps =
     PyYAML
     regendoc>=0.8.1
@@ -181,12 +180,13 @@ description =
 # use latest versions of all plugins, including pre-releases
 pip_pre=true
 changedir = testing/plugins_integration
+dependency_groups =
 deps = -rtesting/plugins_integration/requirements.txt
 allowlist_externals = pip
 setenv =
     PYTHONPATH=.
 commands =
-    pip check
+    uv pip check
     pytest bdd_wallet.py
     pytest --cov=. simple_integration.py
     pytest --ds=django_settings simple_integration.py
@@ -203,6 +203,7 @@ commands =
 description =
     test pytest frozen with `pyinstaller` under `{basepython}`
 changedir = testing/freeze
+dependency_groups =
 deps =
     pyinstaller
 commands =
@@ -213,6 +214,7 @@ commands =
 description = do a release, required posarg of the version number
 usedevelop = True
 passenv = *
+dependency_groups =
 deps =
     colorama
     pre-commit>=2.9.3
@@ -223,19 +225,22 @@ commands = python scripts/release.py {posargs}
 description = prepare a release PR from a manual trigger in GitHub actions
 usedevelop = {[testenv:release]usedevelop}
 passenv = {[testenv:release]passenv}
+dependency_groups = {[testenv:release]dependency_groups}
 deps = {[testenv:release]deps}
 commands = python scripts/prepare-release-pr.py {posargs}
 
 [testenv:generate-gh-release-notes]
 description = generate release notes that can be published as GitHub Release
 usedevelop = True
+dependency_groups =
 deps =
     pypandoc_binary
 commands = python scripts/generate-gh-release-notes.py {posargs}
 
 [testenv:update-plugin-list]
 description = update the plugin list
 skip_install = True
+dependency_groups =
 deps =
     packaging
     requests