Fix workflows for PRs coming from forked repositories

.github/workflows/build-test.yml

@@ -33,28 +33,23 @@ jobs:
         id: build
         run: mvn -B -U "-Dsurefire.rerunFailingTestsCount=5" clean install
 
-      - name: Archive Test Results on Failure
+      - name: Archive Test Results
         uses: actions/upload-artifact@v2
         if: always()
         with:
           name: Unit Test Results ${{ matrix.os }}
           path: target/surefire-reports/
           retention-days: 7
 
-  publish-test-results:
-      name: Publish Unit Test Results
-      runs-on: ubuntu-latest
-      needs: build-and-test
-      if: always()
-
-      steps:
-        - name: Download Artifacts
-          uses: actions/download-artifact@v2
-          with:
-            path: artifacts
-
-        - name: Publish Unit Test Results
-          uses: EnricoMi/publish-unit-test-result-action@v1.26
-          with:
-            files: artifacts/**/*.xml
-
+# We need to upload the event file as an artifact in order to support publishing the results of
+# forked repositories (https://github.com/EnricoMi/publish-unit-test-result-action#support-fork-repositories-and-dependabot-branches)
+  event_file:
+    name: "Event File"
+    runs-on: ubuntu-latest
+    steps:
+      - name: Upload
+        uses: actions/upload-artifact@v2
+        with:
+          name: Event File
+          path: ${{ github.event_path }}
+          retention-days: 1

.github/workflows/publish-test-results.yml

@@ -0,0 +1,37 @@
+# Publishing of unit test results has to be a separate workflow in order to support forked PRs
+# See https://github.com/EnricoMi/publish-unit-test-result-action#support-fork-repositories-and-dependabot-branches
+name: Publish Unit Test Results
+on:
+  workflow_run:
+    workflows: [Build and test]
+    types:
+      - completed
+jobs:
+  unit-test-results:
+    name: Unit Test Results
+    runs-on: ubuntu-latest
+    if: github.event.workflow_run.conclusion != 'skipped'
+
+    steps:
+      - name: Download and Extract Artifacts
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+        run: |
+          mkdir -p artifacts && cd artifacts
+
+          artifacts_url=${{ github.event.workflow_run.artifacts_url }}
+
+          gh api "$artifacts_url" -q '.artifacts[] | [.name, .archive_download_url] | @tsv' | while read artifact
+          do
+            IFS=$'\t' read name url <<< "$artifact"
+            gh api $url > "$name.zip"
+            unzip -d "$name" "$name.zip"
+          done
+
+      - name: Publish Unit Test Results
+        uses: EnricoMi/publish-unit-test-result-action@v1
+        with:
+          commit: ${{ github.event.workflow_run.head_sha }}
+          event_file: artifacts/Event File/event.json
+          event_name: ${{ github.event.workflow_run.event }}
+          files: "artifacts/**/*.xml"