add CI comment on PR

.github/workflows/CI.yml

@@ -29,4 +29,5 @@ jobs:
         uses: actions/upload-artifact@v3
         with:
           name: ${{ github.sha }}_PDF_EXAMPLE
-          path: example/example.pdf
+          path: example/example.pdf
+          if-no-files-found: error

.github/workflows/post-result-CI.yml

@@ -0,0 +1,74 @@
+name: Comment Artifact URL on PR
+
+on:
+  workflow_run:
+    types:
+      - "completed"
+    workflows:
+      - "Build example"
+
+jobs:
+  comment-on-pr:
+    if: github.event.workflow_run.conclusion == 'success'
+    runs-on: ubuntu-latest
+    steps:
+
+      - name: Get Artifact URL & PR Info
+        env:
+          GH_TOKEN: ${{ secrets.token }}
+          OWNER: ${{ github.repository_owner }}
+          REPO: ${{ github.event.repository.name }}
+          WORKFLOW_RUN_EVENT_OBJ: ${{ toJSON(github.event.workflow_run) }}
+        run: |
+
+          PREVIOUS_JOB_ID=$(jq -r '.id' <<< "$WORKFLOW_RUN_EVENT_OBJ")
+          echo "Previous Job ID: $PREVIOUS_JOB_ID"
+          echo "PREVIOUS_JOB_ID=$PREVIOUS_JOB_ID" >> "$GITHUB_ENV"
+
+          ARTIFACT_URL=$(gh api "/repos/$OWNER/$REPO/actions/artifacts" \
+            --jq ".artifacts.[] |
+            select(.workflow_run.id==${PREVIOUS_JOB_ID}) |
+            select(.expired==false) |
+            .archive_download_url")
+
+          echo "ARTIFACT URL: $ARTIFACT_URL"
+          echo "ARTIFACT_URL=$ARTIFACT_URL" >> "$GITHUB_ENV"
+
+          PR_NUMBER=$(jq -r '.pull_requests[0].number' \
+            <<< "$WORKFLOW_RUN_EVENT_OBJ")
+
+          echo "PR Number: $PR_NUMBER"
+          echo "PR_NUMBER=$PR_NUMBER" >> "$GITHUB_ENV"
+
+          HEAD_SHA=$(jq -r '.pull_requests[0].head.sha' \
+            <<< "$WORKFLOW_RUN_EVENT_OBJ")
+
+          echo "Head sha: $HEAD_SHA"
+          echo "HEAD_SHA=$HEAD_SHA" >> "$GITHUB_ENV"
+
+      - name: Update Comment
+        env:
+          JOB_PATH: "${{ github.server_url }}/${{ github.repository }}/actions/\
+            runs/${{ env.PREVIOUS_JOB_ID }}"
+          HEAD_SHA: ${{ env.HEAD_SHA }}
+        uses: peter-evans/create-or-update-comment@v2
+        with:
+          issue-number: ${{ env.PR_NUMBER }}
+          body: |-
+            ## Build Preview
+
+            [![badge]]($JOB_PATH)
+
+            You can find files attached to the below linked Workflow Run URL (Logs).
+
+            Please note that files only stay for around 90 days!
+
+            | Name      | Link
+            --------------------------------------------------------------------
+            | Commit    | ${{ env.HEAD_SHA }}
+
+            | Logs      | ${{ env.JOB_PATH }}
+
+            | Exemple build with ${{ env.PR_NUMBER }} | ${{ env. ARTIFACT_URL }}
+
+            [badge]: https://img.shields.io/badge/Build-Success!-3fb950?logo=github&style=for-the-badge