action: use the most recent python from tool cache to run the GitHub Action

.github/workflows/test.yml

@@ -66,6 +66,19 @@ jobs:
         name: sample_wheels
         path: wheelhouse
 
+    - name: Get some sample wheels (GitHub Action)
+      uses: ./
+      with:
+        package-dir: sample_proj
+        output-dir: wheelhouse_action
+      env:
+        CIBW_ARCHS_MACOS: x86_64 universal2 arm64
+
+    - uses: actions/upload-artifact@v3
+      with:
+        name: sample_wheels_action
+        path: wheelhouse_action
+
     - name: Test cibuildwheel
       run: |
         python ./bin/run_tests.py

action.yml

@@ -20,10 +20,17 @@ branding:
 runs:
   using: composite
   steps:
+    # Set up a non-EOL, cibuildwheel & pipx supported Python version
+    - uses: actions/setup-python@766e8c60885ef280a3e447209d1f1083b3c7039d
+      id: python
+      with:
+        python-version: "3.7 - 3.10"
+        update-environment: false
 
     # Redirecting stderr to stdout to fix interleaving issue in Actions.
     - run: >
         pipx run
+        --python '${{ steps.python.outputs.python-path }}'
         --spec '${{ github.action_path }}'
         cibuildwheel
         ${{ inputs.package-dir }}