Explore using sccache instead of ccache in CI.

Author: gpshead

.github/workflows/build.yml

@@ -92,13 +92,23 @@ jobs:
     timeout-minutes: 60
     needs: check_source
     if: needs.check_source.outputs.run_tests == 'true'
+    env:
+      SCCACHE_GHA_ENABLED: "true"
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
           python-version: '3.x'
       - name: Runner image version
         run: echo "IMAGE_VERSION=${ImageVersion}" >> "$GITHUB_ENV"
+      - name: Run sccache-cache
+        uses: mozilla-actions/[email protected]
+        with:
+          version: "v0.8.2"
+      - name: Configure CC and CXX environment variables
+        run: |
+          echo "CC=sccache gcc" >> "$GITHUB_ENV"
+          echo "CXX=sccache gcc" >> "$GITHUB_ENV"
       - name: Restore config.cache
         uses: actions/cache@v4
         with:
@@ -107,12 +117,6 @@ jobs:
           key: ${{ github.job }}-${{ runner.os }}-${{ env.IMAGE_VERSION }}-${{ needs.check_source.outputs.config_hash }}-${{ env.pythonLocation }}
       - name: Install Dependencies
         run: sudo ./.github/workflows/posix-deps-apt.sh
-      - name: Add ccache to PATH
-        run: echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-      - name: Configure ccache action
-        uses: hendrikmuhs/[email protected]
-        with:
-          save: false
       - name: Configure CPython
         run: |
           # Build Python with the libpython dynamic library

.github/workflows/reusable-ubuntu.yml

@@ -26,10 +26,20 @@ jobs:
       OPENSSL_VER: 3.0.15
       PYTHONSTRICTEXTENSIONBUILD: 1
       TERM: linux
+      SCCACHE_GHA_ENABLED: "true"
     steps:
     - uses: actions/checkout@v4
     - name: Register gcc problem matcher
       run: echo "::add-matcher::.github/problem-matchers/gcc.json"
+    - name: Run sccache-cache on push
+      if: github.event_name == 'push'
+      uses: mozilla-actions/[email protected]
+      with:
+        version: "v0.8.2"
+    - name: Configure CC and CXX environment variables
+      run: |
+        echo "CC=sccache gcc" >> "$GITHUB_ENV"
+        echo "CXX=sccache gcc" >> "$GITHUB_ENV"
     - name: Install dependencies
       run: sudo ./.github/workflows/posix-deps-apt.sh
     - name: Configure OpenSSL env vars
@@ -46,14 +56,6 @@ jobs:
     - name: Install OpenSSL
       if: steps.cache-openssl.outputs.cache-hit != 'true'
       run: python3 Tools/ssl/multissltests.py --steps=library --base-directory "$MULTISSL_DIR" --openssl "$OPENSSL_VER" --system Linux
-    - name: Add ccache to PATH
-      run: |
-        echo "PATH=/usr/lib/ccache:$PATH" >> "$GITHUB_ENV"
-    - name: Configure ccache action
-      uses: hendrikmuhs/[email protected]
-      with:
-        save: ${{ github.event_name == 'push' }}
-        max-size: "200M"
     - name: Setup directory envs for out-of-tree builds
       run: |
         echo "CPYTHON_RO_SRCDIR=$(realpath -m "${GITHUB_WORKSPACE}"/../cpython-ro-srcdir)" >> "$GITHUB_ENV"