Enable Bazel caching in GCS.

PiperOrigin-RevId: 446718586

.github/workflows/bazel_tests.yml

@@ -13,6 +13,8 @@ jobs:
 
   ubuntu:
     runs-on: ${{ matrix.os }}
+    env:
+      BAZEL_CACHE: --remote_cache=https://storage.googleapis.com/protobuf-bazel-cache --google_default_credentials
 
     strategy:
       fail-fast: false   # Don't cancel all jobs if one fails.
@@ -29,10 +31,15 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - name: Set up Cloud SDK
+        uses: google-github-actions/auth@v0
+        with:
+          credentials_json: ${{ secrets.GOOGLE_CREDENTIALS }}
+          export_environment_variables: true
       - name: Setup Python venv
         run: rm -rf /tmp/venv && python3 -m venv /tmp/venv
       - name: Install dependencies
         run: sudo apt update && sudo apt install -y ${{ matrix.install }}
         if: matrix.install != ''
       - name: Run tests
-        run: cd ${{ github.workspace }} && PATH=/tmp/venv/bin:$PATH CC=${{ matrix.CC }} bazel test --test_output=errors ... ${{ matrix.flags }}
+        run: cd ${{ github.workspace }} && PATH=/tmp/venv/bin:$PATH CC=${{ matrix.CC }} bazel test --test_output=errors $BAZEL_CACHE ... ${{ matrix.flags }}

.github/workflows/python_tests.yml

@@ -15,23 +15,23 @@ jobs:
     runs-on: ubuntu-latest
     env:
       DOCKER_IMAGE: gcr.io/protobuf-build/bazel/linux@sha256:05a41edee21f620445ca01c46b9d33be2e4d06c3d8adced4341ac5abea754baa
+      BAZEL_CACHE: --remote_cache=https://storage.googleapis.com/protobuf-bazel-cache --google_default_credentials
 
     steps:
+      - uses: actions/checkout@v2
       - name: Set up Cloud SDK
         uses: google-github-actions/auth@v0
         with:
           credentials_json: ${{ secrets.GOOGLE_CREDENTIALS }}
           export_environment_variables: true
-
       - name: Use gcloud CLI
         run: gcloud info
       - name: Configure Docker
         run: gcloud auth configure-docker
       - name: Pull Docker Image
         run: docker pull $DOCKER_IMAGE
-      - uses: actions/checkout@v2
       - name: Build Wheels
-        run: cd ${{ github.workspace }} && docker run -v$PWD:/workspace $DOCKER_IMAGE build --crosstool_top=@com_google_protobuf//toolchain:clang_suite --symlink_prefix=/ -c dbg python/dist python/dist:test_wheel
+        run: cd ${{ github.workspace }} && docker run -e GOOGLE_APPLICATION_CREDENTIALS=/workspace/$(basename $GOOGLE_APPLICATION_CREDENTIALS) -v$PWD:/workspace $DOCKER_IMAGE build $BAZEL_CACHE --crosstool_top=@com_google_protobuf//toolchain:clang_suite --symlink_prefix=/ -c dbg python/dist python/dist:test_wheel
       - name: Move Wheels
         run: mkdir wheels && find _build/out -name 'protobuf*.whl' -exec mv '{}' wheels ';'
       - uses: actions/upload-artifact@v3