feat: add GitHub Actions workflow for releasing Helm charts to OCI

Author: sk31337

.github/workflows/helm-charts-release-to-gh-oci.yml

@@ -0,0 +1,47 @@
+name: Release Charts
+
+on:
+  workflow_dispatch: {}
+  push:
+    branches:
+      - main
+
+jobs:
+  release:
+    permissions:
+      contents: write
+      packages: write
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "[email protected]"
+
+      - name: Run chart-releaser
+        uses: helm/[email protected]
+        with:
+          charts_dir: helm/charts
+        env:
+          CR_GENERATE_RELEASE_NOTES: true
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Run chart-releaser for umbrella charts
+        uses: helm/[email protected]
+        with:
+          charts_dir: helm/umbrella/blueprints
+        env:
+          CR_GENERATE_RELEASE_NOTES: true
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+
+      - name: Upload to OCI-based registry
+        run: |
+          if [ -d ".cr-release-packages" ]; then
+            helm registry login ghcr.io -u ${{ github.actor }} -p ${{ secrets.GITHUB_TOKEN }}
+            find .cr-release-packages/ -name *.tgz -exec helm push {} oci://ghcr.io/openmcp-project \;
+          fi