Speed up Android CI with parallel checks (#83)

Co-authored-by: Developer <dev@example.com>

.github/actions/flutter-ci-setup/action.yml

@@ -0,0 +1,36 @@
+name: Flutter CI setup
+description: Set up Flutter dependencies and restore build_runner state for CI jobs.
+
+inputs:
+  setup-java:
+    description: Whether this job needs the pinned Java toolchain.
+    required: false
+    default: 'false'
+  build-runner-cache-key:
+    description: Cache key for build_runner state.
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Set up Java
+      if: inputs.setup-java == 'true'
+      uses: actions/setup-java@v5
+      with:
+        distribution: temurin
+        java-version: ${{ env.JAVA_VERSION }}
+        cache: gradle
+    - name: Set up Flutter
+      uses: subosito/flutter-action@v2
+      with:
+        flutter-version: ${{ env.FLUTTER_VERSION }}
+        channel: stable
+        cache: true
+    - name: Get dependencies
+      shell: bash
+      run: flutter pub get
+    - name: Restore build_runner state
+      uses: actions/cache@v4
+      with:
+        path: .dart_tool/build
+        key: ${{ inputs.build-runner-cache-key }}

.github/workflows/android-build.yml

@@ -49,8 +49,54 @@ jobs:
           HEAD_SHA: ${{ github.event.pull_request.head.sha || github.sha }}
         run: node .github/scripts/detect-android-changes.cjs
 
-  analyze-and-build:
-    name: Analyze, test and debug build
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    needs: detect
+    if: github.event_name == 'workflow_dispatch' || needs.detect.outputs.android_changed == 'true'
+    permissions:
+      contents: read
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+      - name: Set up Flutter CI
+        uses: ./.github/actions/flutter-ci-setup
+        with:
+          build-runner-cache-key: ${{ runner.os }}-build-runner-${{ hashFiles('pubspec.lock', 'lib/database/**') }}
+      - name: Generate Drift sources
+        run: dart run build_runner build --delete-conflicting-outputs
+      - name: Analyze
+        run: flutter analyze --no-fatal-infos
+
+  test:
+    name: Tests (shard ${{ matrix.shard }}/4)
+    runs-on: ubuntu-latest
+    needs: detect
+    if: github.event_name == 'workflow_dispatch' || needs.detect.outputs.android_changed == 'true'
+    permissions:
+      contents: read
+    strategy:
+      fail-fast: false
+      matrix:
+        shard: [0, 1, 2, 3]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
+      - name: Set up Flutter CI
+        uses: ./.github/actions/flutter-ci-setup
+        with:
+          build-runner-cache-key: ${{ runner.os }}-build-runner-${{ hashFiles('pubspec.lock', 'lib/database/**') }}
+      - name: Generate Drift sources
+        run: dart run build_runner build --delete-conflicting-outputs
+      - name: Run test shard
+        run: flutter test --total-shards 4 --shard-index ${{ matrix.shard }}
+
+  debug-apk:
+    name: Debug APK build
     runs-on: ubuntu-latest
     needs: detect
     if: github.event_name == 'workflow_dispatch' || needs.detect.outputs.android_changed == 'true'
@@ -61,18 +107,11 @@ jobs:
         uses: actions/checkout@v6
         with:
           fetch-depth: 1
-      - name: Set up Java
-        uses: actions/setup-java@v5
+      - name: Set up Flutter CI
+        uses: ./.github/actions/flutter-ci-setup
         with:
-          distribution: temurin
-          java-version: ${{ env.JAVA_VERSION }}
-          cache: gradle
-      - name: Set up Flutter
-        uses: subosito/flutter-action@v2
-        with:
-          flutter-version: ${{ env.FLUTTER_VERSION }}
-          channel: stable
-          cache: true
+          setup-java: 'true'
+          build-runner-cache-key: ${{ runner.os }}-build-runner-${{ hashFiles('pubspec.lock', 'lib/database/**') }}
       - name: Free runner disk space
         shell: bash
         run: |
@@ -130,8 +169,6 @@ jobs:
           flutter --version
           flutter doctor -v
           java -version
-      - name: Get dependencies
-        run: flutter pub get
       - name: Generate Drift sources
         run: dart run build_runner build --delete-conflicting-outputs
       - name: Commit regenerated Drift sources
@@ -148,10 +185,6 @@ jobs:
           git add lib/database/database.g.dart
           git commit -m 'Regenerate Drift database source'
           git push origin HEAD:${GITHUB_REF_NAME}
-      - name: Analyze
-        run: flutter analyze --no-fatal-infos
-      - name: Run tests
-        run: flutter test
       - name: Build debug APK
         shell: bash
         run: flutter build apk --debug
@@ -184,6 +217,26 @@ jobs:
           if-no-files-found: error
           retention-days: 3
 
+  analyze-and-build:
+    name: Analyze, test and debug build
+    runs-on: ubuntu-latest
+    needs: [detect, analyze, test, debug-apk]
+    if: always() && (github.event_name == 'workflow_dispatch' || needs.detect.outputs.android_changed == 'true')
+    permissions:
+      contents: read
+    steps:
+      - name: Require all Android CI jobs to pass
+        env:
+          ANALYZE_RESULT: ${{ needs.analyze.result }}
+          TEST_RESULT: ${{ needs.test.result }}
+          DEBUG_APK_RESULT: ${{ needs.debug-apk.result }}
+        shell: bash
+        run: |
+          set -euo pipefail
+          test "$ANALYZE_RESULT" = success
+          test "$TEST_RESULT" = success
+          test "$DEBUG_APK_RESULT" = success
+
   release:
     name: Build signed release APK and AAB
     runs-on: ubuntu-latest