Add helm chart linting & publishing to CI

.github/workflows/_helm.yml

@@ -0,0 +1,59 @@
+on:
+  workflow_call:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v4.1.2
+        with:
+          fetch-depth: 0
+
+      - name: Setup Helm
+        uses: azure/setup-helm@v3.5
+
+      - name: Setup chart-testing
+        uses: helm/chart-testing-action@v2.6.1
+
+      - name: Lint
+        run: >
+          ct
+          lint
+          --target-branch=${{ github.event.repository.default_branch }}
+          --validate-maintainers=false
+
+  build_publish:
+    needs:
+      - lint
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout source
+        uses: actions/checkout@v4.1.2
+
+      - name: Retrieve chart dependencies
+        working-directory: charts/energy-scan
+        run: helm dependency update
+
+      - name: Package chart
+        working-directory: charts/energy-scan
+        run: helm package .
+
+      - name: Generate Image Name
+        run: echo IMAGE_REPOSITORY=oci://ghcr.io/$(echo "${{ github.repository }}-chart" | tr '[:upper:]' '[:lower:]' | tr '[_]' '[\-]') >> $GITHUB_ENV
+
+      - name: Log in to GitHub Docker Registry
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v3.1.0
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Publish chart
+        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags')
+        working-directory: charts/energy-scan
+        run: helm push $(ls energy-scan-*.tgz) ${{ env.IMAGE_REPOSITORY }}

.github/workflows/ci.yml

@@ -43,6 +43,14 @@ jobs:
       contents: read
       packages: write
 
+  helm:
+    needs: check
+    if: needs.check.outputs.branch-pr == ''
+    uses: ./.github/workflows/_helm.yml
+    permissions:
+        contents: read
+        packages: write
+
   dist:
     needs: check
     if: needs.check.outputs.branch-pr == ''