Use dependency groups

.github/CONTRIBUTING.md

@@ -76,7 +76,7 @@ test -d .venv || uv venv --python python$(cat .python-version-default)
 Change into the newly created directory and after activating a virtual environment, install an editable version of this project along with its tests requirements:
 
 ```console
-$ pip install -e .[dev]  # or `uv pip install -e .[dev]`
+$ pip install -e . --group dev  # or `uv pip install -e . --group dev`
 ```
 
 Now you can run the test suite:

.github/workflows/ci.yml

@@ -209,7 +209,7 @@ jobs:
       - uses: hynek/setup-cached-uv@v2
 
       - run: uv venv
-      - run: uv pip install -e .[dev]
+      - run: uv pip install -e . --group dev
 
       - run: .venv/bin/python -Ic 'import structlog; print(structlog.__version__)'
         if: runner.os != 'Windows'

pyproject.toml

@@ -39,7 +39,7 @@ Mastodon = "https://mastodon.social/@hynek"
 Bluesky = "https://bsky.app/profile/hynek.me"
 Twitter = "https://twitter.com/hynek"
 
-[project.optional-dependencies]
+[dependency-groups]
 tests = [
     "freezegun>=0.2.8",
     "pretend",
@@ -60,7 +60,10 @@ docs = [
     "sphinxext-opengraph",
     "twisted",
 ]
-dev = ["structlog[tests,typing]"]
+dev = [
+    {include-group = "tests"},
+    {include-group = "typing"},
+]
 
 
 [tool.hatch.version]
@@ -140,7 +143,6 @@ ignore = [
     "PLR2004", # numbers are sometimes fine
     "PLW2901", # overwriting a loop var can be useful
     "RUF001",  # leave my smart characters alone
-    "RUF001",  # leave my smart characters alone
     "SLF001",  # private members are accessed by friendly functions
     "T201",    # prints are fine
     "TC",      # TYPE_CHECKING blocks break autodocs

tox.ini

@@ -12,7 +12,7 @@ env_list =
 [testenv]
 package = wheel
 wheel_build_env = .pkg
-extras =
+dependency_groups =
     tests: tests
     mypy: typing
 commands =
@@ -46,7 +46,7 @@ commands =
 [testenv:docs-{build,doctests,linkcheck}]
 # Keep base_python in sync with ci.yml/docs and .readthedocs.yaml.
 base_python = py313
-extras = docs
+dependency_groups = docs
 commands =
     build: sphinx-build -n -T -W -b html -d {envtmpdir}/doctrees docs {posargs:docs/_build/}html
     doctests: sphinx-build -n -T -W -b doctest -d {envtmpdir}/doctrees docs {posargs:docs/_build/}html
@@ -55,7 +55,7 @@ commands =
 [testenv:docs-watch]
 package = editable
 base_python = {[testenv:docs-build]base_python}
-extras = {[testenv:docs-build]extras}
+dependency_groups = {[testenv:docs-build]dependency_groups}
 deps = watchfiles
 commands =
     watchfiles \
@@ -77,13 +77,13 @@ commands = pre-commit run --all-files
 
 
 [testenv:mypy-pkg]
-extras = typing
+dependency_groups = typing
 commands = mypy src
 
 
 [testenv:pyright]
 deps = pyright
-extras = typing
+dependency_groups = typing
 commands = pyright tests/typing
 
 
@@ -101,7 +101,7 @@ commands = python -c "import structlog; structlog.get_logger().warning('should b
 
 [testenv:docset]
 deps = doc2dash
-extras = docs
+dependency_groups = docs
 allowlist_externals =
     rm
     cp