ci: remove setup-python (#1409)

* ci: remove setup-python where possible

* Remove more

.github/workflows/ci.yml

@@ -54,10 +54,6 @@ jobs:
           name: Packages
           path: dist
       - run: tar xf dist/*.tar.gz --strip-components=1
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-          allow-prereleases: true
       - uses: hynek/setup-cached-uv@v2
 
       - name: Prepare tox
@@ -116,10 +112,6 @@ jobs:
       - run: |
           tar xf dist/*.tar.gz --strip-components=1
           rm -rf src  # ensure tests run against wheel
-      - uses: actions/setup-python@v5
-        with:
-          python-version: ${{ matrix.python-version }}
-          allow-prereleases: true
       - uses: hynek/setup-cached-uv@v2
 
       - run: >
@@ -140,9 +132,6 @@ jobs:
           name: Packages
           path: dist
       - run: tar xf dist/*.tar.gz --strip-components=1
-      - uses: actions/setup-python@v5
-        with:
-          python-version-file: .python-version-default
       - uses: hynek/setup-cached-uv@v2
 
       - name: Download coverage data
@@ -153,7 +142,7 @@ jobs:
 
       - name: Combine coverage & fail if it's <100%.
         run: |
-          uv tool install coverage
+          uv tool install --python $(cat .python-version-default) coverage
 
           coverage combine
           coverage html --skip-covered --skip-empty
@@ -182,10 +171,6 @@ jobs:
           name: Packages
           path: dist
       - run: tar xf dist/*.tar.gz --strip-components=1
-      - uses: actions/setup-python@v5
-        with:
-          # Keep in sync with tox/docs and .readthedocs.yaml.
-          python-version: "3.13"
       - uses: hynek/setup-cached-uv@v2
 
       - run: uvx --with=tox-uv tox run -e docs-doctests,changelog
@@ -197,12 +182,12 @@ jobs:
       - uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version-file: .python-version-default
       - uses: hynek/setup-cached-uv@v2
 
-      - run: uvx --with=tox-uv tox run -e pyright
+      - run: >
+          uvx --with=tox-uv
+          --python $(cat .python-version-default)
+          tox run -e pyright
 
   install-dev:
     name: Verify dev env
@@ -212,9 +197,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - uses: actions/setup-python@v5
-        with:
-          python-version-file: .python-version-default
       - uses: hynek/setup-cached-uv@v2
 
       - run: uv venv --python $(cat .python-version-default)

.readthedocs.yaml

@@ -4,7 +4,7 @@ version: 2
 build:
   os: ubuntu-lts-latest
   tools:
-    # Keep version in sync with tox.ini/docs and ci.yml/docs.
+    # Keep version in sync with tox.ini/docs.
     python: "3.13"
   jobs:
     create_environment:

tox.ini

@@ -65,7 +65,7 @@ commands = pytest --codspeed -n auto bench/test_benchmarks.py
 
 
 [testenv:docs-{build,doctests,linkcheck}]
-# Keep base_python in sync with ci.yml/docs and .readthedocs.yaml.
+# Keep base_python in sync with .readthedocs.yaml.
 base_python = py313
 extras = docs
 commands =