Add publish actions

.github/workflows/publish.yaml

@@ -15,6 +15,23 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
+
+      # Validate that the Image is published with a tag that is a valid SemVer, required by Helm chart
+      - name: Validate SemVer2 version compliance
+        if: startsWith(github.ref, 'refs/tags/')
+        env:
+          SEMVER_REGEX: ^v?(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?(\+[0-9A-Za-z-]+(\.[0-9A-Za-z-]+)*)?$
+
+        run: |
+          ref="${{ github.ref_name }}"
+          my_regex="${{env.SEMVER_REGEX}}"
+          if [[ "$ref" =~ $my_regex ]]; then
+            echo "SemVer compliant version: $ref"
+          else
+            echo "Invalid SemVer version: $ref"
+            exit 1
+          fi
+
       - name: Checkout
         uses: actions/checkout@v4
 
@@ -59,3 +76,33 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           annotations: ${{ steps.meta.outputs.annotations }}
           push: true
+
+
+  build-and-publish-chart:
+    runs-on: ubuntu-latest
+    needs: build-and-push-image
+    steps:
+      - name: checkout repo
+        uses: actions/checkout@v3
+
+      - name: install helm
+        uses: Azure/setup-helm@v3
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+        id: install
+
+      - name: login to gcr using helm
+        run: |
+          echo ${{ secrets.GITHUB_TOKEN }} | helm registry login ${{ env.GCR_IMAGE }} --username ${{ github.repository_owner }} --password-stdin
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@57396166ad8aefe6098280995947635806a0e6ea
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=ref,event=tag
+      - name: package chart and push it
+        run: |
+          helm dependencies update helm/numtracker
+          helm package helm/numtracker --version ${GITHUB_REF##*/?(v)} --app-version ${GITHUB_REF##*/} -d /tmp/
+          helm push /tmp/numtracker-${GITHUB_REF##*/?(v)}.tgz oci://ghcr.io/diamondlightsource/charts