feat: SonarQube PR analysis (!21)

Reviewed-on: #21

.gitea/workflows/build-pr.yml

@@ -0,0 +1,45 @@
+name: Build PR
+
+on: # test
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+
+jobs:
+  build:
+    name: Build and analyze
+    runs-on: ubuntu-latest
+    
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: Set up JDK 21
+        uses: actions/setup-java@v1
+        with:
+          java-version: 21
+      - name: Cache SonarQube packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache Gradle packages
+        uses: actions/cache@v4
+        with:
+          path: ~/.gradle/caches
+          key: ${{ runner.os }}-gradle-${{ hashFiles('**/*.gradle') }}
+          restore-keys: ${{ runner.os }}-gradle
+      - name: Coverage
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+        run: ./gradlew test jacocoTestReport sonar
+      - name: Build and analyze
+        env:
+          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+          SONAR_HOST_URL: ${{ secrets.SONAR_HOST_URL }}
+        run: ./gradlew build sonar --info -Dsonar.pullrequest.branch=${{ github.event.pull_request.head.ref }} -Dsonar.pullrequest.base=${{ github.event.pull_request.base.ref }} -Dsonar.pullrequest.key=${{github.event.pull_request.number}}