chore: Add publish action

.github/workflows/publish.yaml

@@ -0,0 +1,91 @@
+name: publish
+on:
+  push:
+    tags:
+      - v*
+  workflow_dispatch:
+
+
+permissions: 
+  packages: write
+
+env:
+  OCI_URL: ghcr.io/openmcp-project
+
+jobs:
+  release_tag:
+    name: Release version
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          ssh-key: ${{ secrets.PUSH_KEY }}
+          fetch-tags: true
+          fetch-depth: 0
+
+      - name: Read and validate VERSION
+        id: version
+        run: |
+          VERSION=$(cat VERSION)
+          if [[ ! "$VERSION" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-dev)?$ ]]; then
+            echo "Invalid version format in VERSION file: $VERSION"
+            exit 1
+          fi
+          echo "New version: $VERSION"
+          echo "version=$VERSION" >> $GITHUB_ENV
+
+      - name: Skip release if version is a dev version
+        if: contains(env.version, '-dev')
+        run: |
+          echo "Skipping development version release: ${{ env.version }}"
+          echo "SKIP=true" >> $GITHUB_ENV
+          exit 0
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Context for Buildx
+        id: buildx-context
+        run: |
+          docker context create builders
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        timeout-minutes: 5
+        uses: docker/setup-buildx-action@v2
+        with:
+          version: latest
+
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version-file: go.mod
+
+      - name: Build the ${{ github.repository }}
+        run: |
+          make prepare-release 
+          make build
+
+      - name: Build Images
+        run: |
+          IMAGE_REGISTRY=ghcr.io/openmcp-project make image-build
+
+      - name: setup OCM
+        uses: open-component-model/ocm-setup-action@main
+
+      - name: Create OCM CTF
+        run: |
+          ocm add componentversions --create \
+          --file ctf component-constructor.yaml \
+          --settings settings.yaml  -- VERSION=${{ env.version }}
+
+      - name: Push CTF
+        run: |
+          ocm transfer ctf --overwrite ./ctf ${{ env.OCI_URL }} 

component-constructor.yaml

@@ -0,0 +1,21 @@
+components:
+- name:  ${COMPONENT_NAME_PREFIX}/${COMPONENT_NAME}
+  version: ${VERSION}
+  provider:
+    name: ${PROVIDER}
+  resources:
+    - name: ${COMPONENT_NAME}-chart
+      type: helmChart
+      input:
+        type: helm
+        path: ./charts/${COMPONENT_NAME}
+        repository: charts/${COMPONENT_NAME}
+
+    - name: ${COMPONENT_NAME}-image
+      type: ociImage
+      input:
+        type: dockermulti
+        repository: images/${COMPONENT_NAME}
+        variants:
+        - "${COMPONENT_REPO_PREFIX}:${VERSION}-linux-amd64"
+        - "${COMPONENT_REPO_PREFIX}:${VERSION}-linux-arm64"

settings.yaml

@@ -0,0 +1,4 @@
+COMPONENT_NAME: control-plane-operator
+COMPONENT_NAME_PREFIX: github.com/openmcp-project
+PROVIDER: openmcp-project
+COMPONENT_REPO_PREFIX: ghcr.io/openmcp-project/control-plane-operator