Does setup-python's cache look at the checked out repository?

.github/workflows/ci.yml

@@ -18,27 +18,11 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python: ['pypy-3.10', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python: ['pypy-3.10']
         arch: ['x86', 'x64']
         lsp: ['']
         lsp_extract_file: ['']
         extra_name: ['']
-        include:
-          - python: '3.8'
-            arch: 'x64'
-            lsp: 'https://raw.githubusercontent.com/python-trio/trio-ci-assets/master/komodia-based-vpn-setup.zip'
-            lsp_extract_file: 'komodia-based-vpn-setup.exe'
-            extra_name: ', with Komodia LSP'
-          - python: '3.8'
-            arch: 'x64'
-            lsp: 'https://www.proxifier.com/download/legacy/ProxifierSetup342.exe'
-            lsp_extract_file: ''
-            extra_name: ', with IFS LSP'
-          #- python: '3.8'
-          #  arch: 'x64'
-          #  lsp: 'http://download.pctools.com/mirror/updates/9.0.0.2308-SDavfree-lite_en.exe'
-          #  lsp_extract_file: ''
-          #  extra_name: ', with non-IFS LSP'
     continue-on-error: >-
       ${{
         (
@@ -49,8 +33,6 @@ jobs:
         || false
       }}
     steps:
-      - name: Checkout
-        uses: actions/checkout@v4
       - name: Setup python
         uses: actions/setup-python@v5
         with:
@@ -66,172 +48,8 @@ jobs:
           architecture: '${{ matrix.arch }}'
           # Caching can lead to issues with constraints on PyPy as in #3076.
           # This is probably a bug in the cache key, but I'm not sure.
-          # cache: pip
-          # cache-dependency-path: test-requirements.txt
-      - name: Run tests
-        run: ./ci.sh
-        shell: bash
-        env:
-          LSP: '${{ matrix.lsp }}'
-          LSP_EXTRACT_FILE: '${{ matrix.lsp_extract_file }}'
-      - if: always()
-        uses: codecov/codecov-action@v3
-        with:
-          directory: empty
-          token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
-          name: Windows (${{ matrix.python }}, ${{ matrix.arch }}${{ matrix.extra_name }})
-          flags: Windows,${{ matrix.python }}
-
-  Ubuntu:
-    name: 'Ubuntu (${{ matrix.python }}${{ matrix.extra_name }})'
-    timeout-minutes: 10
-    runs-on: 'ubuntu-latest'
-    strategy:
-      fail-fast: false
-      matrix:
-        python: ['pypy-3.10', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
-        check_formatting: ['0']
-        no_test_requirements: ['0']
-        extra_name: ['']
-        include:
-          - python: '3.12'
-            check_formatting: '1'
-            extra_name: ', check formatting'
-          # separate test run that doesn't install test-requirements.txt
-          - python: '3.8'
-            no_test_requirements: '1'
-            extra_name: ', no test-requirements'
-    continue-on-error: >-
-      ${{
-        (
-          endsWith(matrix.python, '-dev')
-          || endsWith(matrix.python, '-nightly')
-        )
-        && true
-        || false
-      }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v5
-        if: "!endsWith(matrix.python, '-dev')"
-        with:
-          python-version: ${{ fromJSON(format('["{0}", "{1}"]', format('{0}.0-alpha - {0}.X', matrix.python), matrix.python))[startsWith(matrix.python, 'pypy')] }}
-          cache: pip
-          cache-dependency-path: test-requirements.txt
-      - name: Setup python (dev)
-        uses: deadsnakes/action@v2.0.2
-        if: endsWith(matrix.python, '-dev')
-        with:
-          python-version: '${{ matrix.python }}'
-      - name: Run tests
-        run: ./ci.sh
-        env:
-          CHECK_FORMATTING: '${{ matrix.check_formatting }}'
-          NO_TEST_REQUIREMENTS: '${{ matrix.no_test_requirements }}'
-      - if: always()
-        uses: codecov/codecov-action@v3
-        with:
-          directory: empty
-          token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
-          name: Ubuntu (${{ matrix.python }}${{ matrix.extra_name }})
-          flags: Ubuntu,${{ matrix.python }}
-
-  macOS:
-    name: 'macOS (${{ matrix.python }})'
-    timeout-minutes: 15
-    runs-on: 'macos-latest'
-    strategy:
-      fail-fast: false
-      matrix:
-        python: ['pypy-3.10', '3.8', '3.9', '3.10', '3.11', '3.12']
-    continue-on-error: >-
-      ${{
-        (
-          endsWith(matrix.python, '-dev')
-          || endsWith(matrix.python, '-nightly')
-        )
-        && true
-        || false
-      }}
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v5
-        with:
-          python-version: ${{ fromJSON(format('["{0}", "{1}"]', format('{0}.0-alpha - {0}.X', matrix.python), matrix.python))[startsWith(matrix.python, 'pypy')] }}
           cache: pip
           cache-dependency-path: test-requirements.txt
-      - name: Run tests
-        run: ./ci.sh
-      - if: always()
-        uses: codecov/codecov-action@v3
-        with:
-          directory: empty
-          token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
-          name: macOS (${{ matrix.python }})
-          flags: macOS,${{ matrix.python }}
-
-  # run CI on a musl linux
-  Alpine:
-    name: "Alpine"
-    runs-on: ubuntu-latest
-    container: alpine
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Install necessary packages
-        # can't use setup-python because that python doesn't seem to work;
-        # `python3-dev` (rather than `python:alpine`) for some ctypes reason,
-        # `nodejs` for pyright (`node-env` pulls in nodejs but that takes a while and can time out the test).
-        run: apk update && apk add python3-dev bash nodejs
-      - name: Enter virtual environment
-        run: python -m venv .venv
-      - name: Run tests
-        run: source .venv/bin/activate && ./ci.sh
-      - if: always()
-        uses: codecov/codecov-action@v3
-        with:
-          directory: empty
-          token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
-          name: Alpine
-          flags: Alpine,3.12
-
-  Cython:
-    name: "Cython"
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        python: ['3.8', '3.12']
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-      - name: Setup python
-        uses: actions/setup-python@v5
-        with:
-            python-version: '${{ matrix.python }}'
-            cache: pip
-        # setuptools is needed to get distutils on 3.12, which cythonize requires
-      - name: install trio and setuptools
-        run: python -m pip install --upgrade pip . setuptools
-
-      - name: install cython<3
-        run: python -m pip install "cython<3"
-      - name: compile pyx file
-        run: cythonize -i tests/cython/test_cython.pyx
-      - name: import & run module
-        run: python -c 'import tests.cython.test_cython'
-
-      - name: install cython>=3
-        run: python -m pip install "cython>=3"
-      - name: compile pyx file
-        # different cython version should trigger a re-compile, but --force just in case
-        run: cythonize --inplace --force tests/cython/test_cython.pyx
-      - name: import & run module
-        run: python -c 'import tests.cython.test_cython'
 
   # https://github.com/marketplace/actions/alls-green#why
   check:  # This job does nothing and is only used for the branch protection
@@ -240,10 +58,6 @@ jobs:
 
     needs:
       - Windows
-      - Ubuntu
-      - macOS
-      - Alpine
-      - Cython
 
     runs-on: ubuntu-latest