fix(ci): do not overwrite android google-services.json when secret is empty

Author: Shimi Dudkin

.github/workflows/release.yml

@@ -154,8 +154,19 @@ jobs:
       - name: Setup Android SDK
         uses: android-actions/setup-android@v3
 
-      - name: Decode google-services.json
-        run: echo "${{ secrets.GOOGLE_SERVICES_JSON }}" | base64 -d > app/google-services.json
+      - name: Provide google-services.json
+        env:
+          GOOGLE_SERVICES_JSON_B64: ${{ secrets.GOOGLE_SERVICES_JSON }}
+        run: |
+          if [ -n "$GOOGLE_SERVICES_JSON_B64" ]; then
+            echo "$GOOGLE_SERVICES_JSON_B64" | base64 -d > app/google-services.json
+            echo "Using google-services.json from secret."
+          elif [ -f "app/google-services.json" ]; then
+            echo "Using checked-in app/google-services.json."
+          else
+            echo "ERROR: app/google-services.json not found and GOOGLE_SERVICES_JSON secret is empty."
+            exit 1
+          fi
 
       - name: Build release APK
         run: ./gradlew assembleRelease