Publish manifest for multiple runners

.github/workflows/publish-image.yaml

@@ -5,16 +5,16 @@ on:
     tags-ignore:
       - "invoiceninja-*"
 
+env:
+  REGISTRY_IMAGE: invoiceninja/invoiceninja-debian
+
 jobs:
-  docker:
+  build:
     runs-on: ${{ startsWith(matrix.platforms, 'linux/arm') && 'ubuntu-24.04-arm' || 'ubuntu-latest' }}
     strategy:
       fail-fast: false
       matrix:
         platform: ["linux/amd64", "linux/arm64"]
-        include:
-          - image: invoiceninja/invoiceninja-debian
-            context: debian
 
     steps:
       - name: Checkout
@@ -23,7 +23,10 @@ jobs:
       - name: Prepare
         id: prep
         run: |
-          DOCKER_IMAGE=${{ matrix.image }}
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
+
+          DOCKER_IMAGE=${{ env.REGISTRY_IMAGE }}
           VERSION=edge
           if [[ $GITHUB_REF == refs/tags/* ]]; then
             VERSION=${GITHUB_REF#refs/tags/}
@@ -43,32 +46,93 @@ jobs:
           echo "version=${VERSION}" >> $GITHUB_OUTPUT
           echo "major=${MAJOR}" >> $GITHUB_OUTPUT
 
-      - name: Set up Docker Buildx
-        id: buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
 
       - name: Login to DockerHub
-        if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
 
-      - name: Build and push
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push by digest
         id: docker_build
         uses: docker/build-push-action@v6
         with:
-          context: ${{ matrix.context }}
+          context: debian
           build-args: INVOICENINJA_VERSION=${{ steps.prep.outputs.version }}
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.prep.outputs.tags }}
+          outputs: type=image,push-by-digest=true,name-canonical=true
           cache-from: type=gha
           cache-to: type=gha,mode=max
 
-      - name: Image digest
-        run: echo ${{ steps.docker_build.outputs.digest }}
+      - name: Export digest
+        run: |
+          mkdir -p ${{ runner.temp }}/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "${{ runner.temp }}/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: ${{ runner.temp }}/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+
+      - name: Create manifest list and push
+        working-directory: ${{ runner.temp }}/digests
+        if: ${{ github.event_name != 'pull_request' }}
+        run: |
+          docker buildx imagetools create $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}
 
   Description:
+    if: ${{ github.event_name != 'pull_request' }}
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
@@ -81,4 +145,4 @@ jobs:
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_PASSWORD }}
-          repository: invoiceninja/invoiceninja-debian
+          repository: ${{ env.REGISTRY_IMAGE }}