Add pull request workflow

.forgejo/workflows/pull_request.yml

@@ -0,0 +1,74 @@
+name: Build & Test
+
+on:
+  pull_request:
+  push:
+    branches: [ main ]
+
+jobs:
+  validate:
+    runs-on: ubuntu-latest
+    name: Validate
+    steps:
+      - uses: actions/checkout@v4
+      - name: set up JDK
+        uses: https://git.wbrawner.com/actions/setup-java@v4
+        with:
+          distribution: 'zulu'
+          java-version: '17'
+      - name: Validate Gradle Wrapper
+        uses: https://git.wbrawner.com/gradle/actions/wrapper-validation@v4
+  unit_tests:
+    name: Run Unit Tests
+    runs-on: ubuntu-latest
+    needs:
+      - validate
+    steps:
+      - uses: actions/checkout@v4
+      - name: set up JDK
+        uses: https://git.wbrawner.com/actions/setup-java@v4
+        with:
+          distribution: 'zulu'
+          java-version: '17'
+      - name: Setup Android SDK
+        uses: https://git.wbrawner.com/android-actions/setup-android@v3
+      - name: Setup Gradle
+        uses: https://git.wbrawner.com/gradle/actions/setup-gradle@v4
+      - name: Run checks
+        run: ./gradlew check
+# TODO: Uncomment the following once I get unit tests written
+#      - name: Publish JUnit Results
+#        uses: actions/upload-artifact@v3
+#        if: always()
+#        with:
+#          name: Unit Test Results
+#          path: "*/build/reports/*"
+#          if-no-files-found: error
+# TODO: Uncomment the following once I get UI tests written
+#  ui_tests:
+#    runs-on: ubuntu-latest
+#    name: Run UI Tests
+#    needs:
+#      - validate
+#    steps:
+#      - uses: actions/checkout@v2
+#      - name: set up JDK
+#        uses: https://git.wbrawner.com/actions/setup-java@v3
+#        with:
+#          distribution: 'zulu'
+#          java-version: '17'
+#      - name: Build with Gradle
+#        uses: https://git.wbrawner.com/gradle/gradle-build-action@v2
+#        with:
+#          arguments: assembleDebug assembleDebugAndroidTest
+#      - name: Grant execute permission for flank_auth.sh
+#        run: chmod +x flank_auth.sh
+#      - name: Add auth for flank
+#        env:
+#          GCLOUD_KEY: ${{ secrets.GCLOUD_KEY }}
+#        run: |
+#          ./flank_auth.sh
+#      - name: Run UI tests
+#        uses: https://git.wbrawner.com/gradle/gradle-build-action@v2
+#        with:
+#          arguments: runFlank