WORKFLOW: enhanced for PR and posting on PR, renamed

.github/workflows/build_retrodeck.yml

@@ -188,6 +188,7 @@ jobs:
       - name: Generate a token for Rekku
         id: generate-rekku-token
         uses: actions/create-github-app-token@v1
+        if: github.event_name != 'pull_request'
         with:
           app-id: ${{ vars.REKKU_APP_ID }}
           private-key: ${{ secrets.REKKU_PRIVATE_KEY }}
@@ -231,7 +232,22 @@ jobs:
             RetroDECK*.flatpak.sha
             RetroDECK*Artifact.tar.gz
 
+      - name: Post PR comment with artifacts
+        if: github.event_name == 'pull_request'
+        uses: marocchino/sticky-pull-request-comment@v2
+        with:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          header: "RetroDECK Build Artifacts"
+          message: |
+            A build for this pull request has completed successfully.
+            Codenname: ${{ steps.version-tag.outputs.TAG }}
+            Here are the artifacts to install and test:
+            - RetroDECK Flatpak: [RetroDECK.flatpak](./retrodeck-artifacts/RetroDECK.flatpak)
+            - SHA256 Checksum: [RetroDECK.flatpak.sha](./retrodeck-artifacts/RetroDECK.flatpak.sha)
+            - Artifact Bundle: [RetroDECKArtifact.tar.gz](./retrodeck-artifacts/RetroDECKArtifact.tar.gz)
+
   GitHub-publish:
+    if: github.event_name != 'pull_request'
     runs-on: ubuntu-latest
     needs: Build_RetroDECK
     env:
@@ -243,6 +259,7 @@ jobs:
       - name: Generate a token for Rekku
         id: generate-rekku-token
         uses: actions/create-github-app-token@v1
+        if: github.event_name != 'pull_request'
         with:
           app-id: ${{ vars.REKKU_APP_ID }}
           private-key: ${{ secrets.REKKU_PRIVATE_KEY }}