Container: Build ARM in native runner instead of QEMU, merge and clean

.github/workflows/container.yml

@@ -15,9 +15,17 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  container:
-    name: Container
-    runs-on: ubuntu-22.04
+
+  build:
+    runs-on: ubuntu-24.04${{ matrix.suffix }}
+    strategy:
+      matrix:
+        platform: [amd64, arm64]
+        include:
+          - platform: amd64
+            suffix:
+          - platform: arm64
+            suffix: -arm
     permissions:
       packages: write
     steps:
@@ -32,8 +40,7 @@ jobs:
           repository: processone/ejabberd-contrib
           path: .ejabberd-modules/sources/ejabberd-contrib
 
-      - name: Log in to the Container registry
-        uses: docker/login-action@v3
+      - uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
@@ -43,24 +50,19 @@ jobs:
         id: gitdescribe
         run: echo "ver=$(git describe --tags)" >> $GITHUB_OUTPUT
 
-      - name: Extract metadata (tags, labels) for Docker
+      - uses: docker/metadata-action@v5
         id: meta
-        uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          flavor: suffix=--${{ matrix.platform }},latest=false
           labels: |
             org.opencontainers.image.revision=${{ steps.gitdescribe.outputs.ver }}
             org.opencontainers.image.licenses=GPL-2.0
             org.opencontainers.image.vendor=ProcessOne
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+      - uses: docker/setup-buildx-action@v3
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Build and push Docker image
-        uses: docker/build-push-action@v6
+      - uses: docker/build-push-action@v6
         with:
           build-args: |
             VERSION=${{ steps.gitdescribe.outputs.ver }}
@@ -69,6 +71,38 @@ jobs:
           context: .
           file: .github/container/Dockerfile
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: linux/amd64,linux/arm64
+          platforms: linux/${{ matrix.platform }}
           push: true
           tags: ${{ steps.meta.outputs.tags }}
+
+  merge:
+    needs: [build]
+    runs-on: ubuntu-24.04
+    outputs:
+      image-uri: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@${{ steps.merge.outputs.digest }}
+    steps:
+      - uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - uses: docker/metadata-action@v5
+        id: metadata
+        with:
+          images: ghcr.io/${{ github.repository }}
+      - uses: int128/docker-manifest-create-action@v2
+        id: merge
+        with:
+          index-annotations: ${{ steps.metadata.outputs.labels }}
+          tags: ${{ steps.metadata.outputs.tags }}
+          sources: |
+            ${{ steps.metadata.outputs.tags }}--amd64
+            ${{ steps.metadata.outputs.tags }}--arm64
+      - uses: dataaxiom/ghcr-cleanup-action@v1
+        with:
+          dry-run: true
+          delete-tags: '*--a??64'
+          delete-untagged: true
+          delete-ghost-images: true
+          delete-partial-images: true
+          delete-orphaned-images: true