Add final-status for CI jobs (#2725)

Author: nedtwigg

.github/workflows/ci.yml

@@ -103,3 +103,19 @@ jobs:
           check_name: JUnit ${{ matrix.kind }} ${{ matrix.jre }} ${{ matrix.os }}
           report_paths: '*/build/test-results/*/TEST-*.xml'
           check_retries: true
+
+  # Status check that is required in branch protection rules.
+  final-status:
+    needs:
+      - build
+    runs-on: ubuntu-latest
+    if: always()
+    steps:
+      - name: Check
+        run: |
+          results=$(tr -d '\n' <<< '${{ toJSON(needs.*.result) }}')
+          if ! grep -q -v -E '(failure|cancelled)' <<< "$results"; then
+            echo "One or more required jobs failed"
+            exit 1
+          fi
+          echo "All required jobs completed successfully."