Fix artifacts handling in CI

.github/workflows/end2end-test.yml

@@ -53,24 +53,41 @@ jobs:
 
             - name: Archive debug artifacts (screenshots, traces)
               uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
-              if: always()
+              if: ${{ !cancelled() }}
               with:
-                  name: failures-artifacts
+                  name: failures-artifacts--${{ matrix.part }}
                   path: artifacts/test-results
                   if-no-files-found: ignore
 
             - name: Archive flaky tests report
               uses: actions/upload-artifact@65462800fd760344b1a7b4382951275a0abb4808 # v4.3.3
-              if: always()
+              if: ${{ !cancelled() }}
               with:
-                  name: flaky-tests-report
+                  name: flaky-tests-report--${{ matrix.part }}
                   path: flaky-tests
                   if-no-files-found: ignore
 
+    merge-artifacts:
+        # Merges all artifacts from all shards into a single zip and
+        # deletes the parts. In case of a rerun, artifacts from the
+        # previous run will be retained by merging them with the new ones.
+        name: Merge Artifacts
+        if: ${{ !cancelled() }}
+        needs: [e2e-playwright]
+        runs-on: ubuntu-latest
+        steps:
+            - name: Merge Artifacts
+              uses: actions/upload-artifact/merge@v4
+              # Don't fail the job if there aren't any artifacts to merge.
+              continue-on-error: true
+              with:
+                  name: failures-artifacts
+                  delete-merged: true
+
     report-to-issues:
         name: Report to GitHub
         needs: [e2e-playwright]
-        if: ${{ always() }}
+        if: ${{ !cancelled() }}
         runs-on: ubuntu-latest
         steps:
             # Checkout defaults to using the branch which triggered the event, which
@@ -81,24 +98,25 @@ jobs:
                   show-progress: ${{ runner.debug == '1' && 'true' || 'false' }}
 
             - uses: actions/[email protected]
-              id: download_artifact
+              id: download-artifact
               # Don't fail the job if there isn't any flaky tests report.
               continue-on-error: true
               with:
-                  name: flaky-tests-report
+                  pattern: flaky-tests-report--*
                   path: flaky-tests
+                  marge-multiple: true
 
             - name: Setup Node.js and install dependencies
-              if: ${{ steps.download_artifact.outcome == 'success' }}
+              if: ${{ steps.download-artifact.outcome == 'success' }}
               uses: ./.github/setup-node
 
             - name: Npm build
-              if: ${{ steps.download_artifact.outcome == 'success' }}
+              if: ${{ steps.download-artifact.outcome == 'success' }}
               # TODO: We don't have to build the entire project, just the action itself.
               run: npm run build:packages
 
             - name: Report flaky tests
-              if: ${{ steps.download_artifact.outcome == 'success' }}
+              if: ${{ steps.download-artifact.outcome == 'success' }}
               uses: ./packages/report-flaky-tests
               with:
                   repo-token: '${{ secrets.GITHUB_TOKEN }}'