Fix pr test job submission

.github/workflows/build-yocto.yml

@@ -10,6 +10,7 @@ on:
 env:
   CACHE_DIR: /srv/gh-runners/quic-yocto
   KAS_REPO_REF_DIR: /srv/gh-runners/quic-yocto/kas-mirrors
+  BASE_ARTIFACT_URL: "https://quic-yocto-fileserver-1029608027416.us-central1.run.app/${{ github.run_id }}"
 
 jobs:
   kas-lock:
@@ -107,7 +108,7 @@ jobs:
           mv ../kas/build/tmp/deploy/images/${{matrix.machine}} $img_dir
 
           # Instruct our file server to make these files available for download
-          url="https://quic-yocto-fileserver-1029608027416.us-central1.run.app/${GITHUB_RUN_ID}/${{ matrix.machine }}/"
+          url="${BASE_ARTIFACT_URL}/${{ matrix.machine }}/"
 
           retries=8
           okay=0
@@ -142,5 +143,11 @@ jobs:
       - name: "Print output"
         id: print-output
         run: |
-          echo "Downloads URL: https://quic-yocto-fileserver-1029608027416.us-central1.run.app/${GITHUB_RUN_ID}/"
-          echo "url=\"https://quic-yocto-fileserver-1029608027416.us-central1.run.app/${GITHUB_RUN_ID}/\"" >> $GITHUB_OUTPUT
+          echo "Downloads URL: ${BASE_ARTIFACT_URL}"
+          echo "url=\"${BASE_ARTIFACT_URL}\"" >> $GITHUB_OUTPUT
+          echo "${BASE_ARTIFACT_URL}" > build_url
+      - name: Upload build URL
+        uses: actions/upload-artifact@v4
+        with:
+          name: build_url
+          path: build_url

.github/workflows/test-pr.yml

@@ -1,16 +1,58 @@
 name: Test PR build
 
+run-name: "Tests triggered by PR: ${{ github.event.workflow_run.display_title }}"
+
 on:
   workflow_run:
     workflows: ["Build on PR"]
     types:
       - completed
 
 jobs:
+  retrieve-build-url:
+    runs-on: ubuntu-latest
+    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    outputs:
+      url: ${{ steps.set-build-url.outputs.url }}
+    steps:
+      - name: 'Download build URL'
+        uses: actions/github-script@v6
+        with:
+          script: |
+            let allArtifacts = await github.rest.actions.listWorkflowRunArtifacts({
+               owner: context.repo.owner,
+               repo: context.repo.repo,
+               run_id: context.payload.workflow_run.id,
+            });
+            let matchArtifact = allArtifacts.data.artifacts.filter((artifact) => {
+              return artifact.name == "build_url"
+            })[0];
+            let download = await github.rest.actions.downloadArtifact({
+               owner: context.repo.owner,
+               repo: context.repo.repo,
+               artifact_id: matchArtifact.id,
+               archive_format: 'zip',
+            });
+            const fs = require('fs');
+            const path = require('path');
+            const temp = '${{ runner.temp }}/artifacts';
+            if (!fs.existsSync(temp)){
+              fs.mkdirSync(temp);
+            }
+            fs.writeFileSync(path.join(temp, 'build_url.zip'), Buffer.from(download.data));
+
+      - name: 'Setup build URL'
+        id: set-build-url
+        run: |
+          unzip "${{ runner.temp }}/artifacts/build_url.zip"
+          BUILD_URL=$(cat build_url)
+          echo "Build URL: ${BUILD_URL}"
+          echo "url=${BUILD_URL}" >> $GITHUB_OUTPUT
+
   test:
     uses: ./.github/workflows/test.yml
     secrets: inherit
-    if: ${{ github.event.workflow_run.conclusion == 'success' }}
+    needs: retrieve-build-url
     with:
-      url: ${{ github.event.workflow_run.outputs.artifacts_url }}
+      url: ${{ needs.retrieve-build-url.outputs.url }}