Add test coverage workflow

.github/workflows/test_coverage.yml

@@ -0,0 +1,79 @@
+name: test_coverage
+
+on:
+  pull_request:
+    # open will be triggered when a pull request is created.
+    # synchronize will be triggered when a pull request has new commits.
+    # closed will be triggered when a pull request is closed.
+    types: [opened, synchronize, closed]
+
+env:
+  METRICS_SERVICE_SECRET: ${{ secrets.GHASecretsGPGPassphrase1 }}
+
+jobs:
+  pod_lib_lint:
+    if: github.repository == 'google/GoogleDataTransport' && (github.event.action == 'synchronize' || github.event.action == 'opened' || github.event.pull_request.merged)
+    runs-on: macos-latest
+    strategy:
+      matrix:
+        target: [ios]
+    steps:
+    - uses: actions/checkout@v2
+    - name: Setup Scripts Directory
+      run: ./setup-scripts.sh
+    - name: Setup Bundler
+      run: ./scripts/setup_bundler.sh
+    - name: PodLibLint DataTransport
+      run: |
+        scripts/code_coverage_report/pod_test_code_coverage_report.sh --sdk=GoogleDataTransport --platform=${{ matrix.target }} --test_spec="Tests-Unit"
+    - uses: actions/upload-artifact@v2
+      with:
+        name: codecoverage
+        path: /Users/runner/*.xcresult
+  manage_test_results:
+    if: github.repository == 'google/GoogleDataTransport' && (github.event.action == 'synchronize' || github.event.action == 'opened' || github.event.pull_request.merged)
+    needs: pod_lib_lint
+    runs-on: macOS-latest
+    steps:
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - uses: actions/download-artifact@v2
+      id: download
+      with:
+        path: /Users/runner/test
+    - name: Setup Scripts Directory
+      run: ./setup-scripts.sh
+    - name: Access to Metrics Service
+      if:  ${{ env.METRICS_SERVICE_SECRET }}
+      run: |
+        # Install gcloud sdk
+        curl https://sdk.cloud.google.com > install.sh
+        bash install.sh --disable-prompts
+        echo "${HOME}/google-cloud-sdk/bin/" >> $GITHUB_PATH
+        export PATH="${HOME}/google-cloud-sdk/bin/:${PATH}"
+
+        # Activate the service account for Metrics Service.
+        scripts/decrypt_gha_secret.sh scripts/gha-encrypted/metrics_service_access.json.gpg \
+        metrics-access.json "${{ env.METRICS_SERVICE_SECRET }}"
+        gcloud auth activate-service-account --key-file metrics-access.json
+    - name: Build code coverage tool
+      run: |
+        cd firebase-ios-sdk/scripts/code_coverage_report/generate_code_coverage_report/
+        swift build
+    - name: Generate report
+      if: github.event_name == 'pull_request' && ${{ env.METRICS_SERVICE_SECRET }}
+      env:
+        pr_branch: ${{ github.event.pull_request.head.ref }}
+      run: |
+        common_commit=$(git merge-base remotes/origin/${pr_branch} remotes/origin/main)
+        GITHUB_SHA=$(cat $GITHUB_EVENT_PATH | jq -r .pull_request.head.sha)
+        if [ -d "${{steps.download.outputs.download-path}}" ]; then
+        firebase-ios-sdk/scripts/code_coverage_report/generate_code_coverage_report/.build/debug/CoverageReportGenerator --presubmit "Google/GoogleDataTransport" --commit "${GITHUB_SHA}" --token $(gcloud auth print-identity-token) --xcresult-dir "${{steps.download.outputs.download-path}}/codecoverage" --log-link "https://github.com/firebase/firebase-ios-sdk/actions/runs/${GITHUB_RUN_ID}" --pull-request-num ${{github.event.pull_request.number}} --base-commit "$common_commit"
+        fi
+    - name: Update New Coverage Data
+      if: github.event.pull_request.merged == true && ${{ env.METRICS_SERVICE_SECRET }}
+      run: |
+        if [ -d "${{steps.download.outputs.download-path}}" ]; then
+        firebase-ios-sdk/scripts/code_coverage_report/generate_code_coverage_report/.build/debug/CoverageReportGenerator --merge "Google/GoogleDataTransport" --commit "${GITHUB_SHA}" --token $(gcloud auth print-identity-token) --xcresult-dir "${{steps.download.outputs.download-path}}/codecoverage" --log-link "https://github.com/firebase/firebase-ios-sdk/actions/runs/${GITHUB_RUN_ID}" --branch "${GITHUB_REF##*/}"
+        fi