add check for helm chart before publishing

Author: loitly

.github/workflows/build_publish.yml

@@ -104,12 +104,15 @@ jobs:
       # Package and push Helm chart to GHCR
       # ------------------------------------------------------------
       - name: Set up Helm
-        if: github.event_name == 'release' || inputs.push_image
         uses: azure/setup-helm@v4
 
       - name: Publish Helm chart
         if: github.event_name == 'release' || inputs.push_image
         run: |
+          if [[ ! -f firefly/helm/Chart.yaml ]]; then
+            echo "No Helm chart found, skipping."
+            exit 0
+          fi
           # align chart appVersion with the image tag
           sed -i "s/^appVersion:.*/appVersion: \"${{ steps.resolve_tags.outputs.tag }}\"/" firefly/helm/Chart.yaml
           helm package firefly/helm/