chore: improve docker github action

.github/workflows/main.yml

@@ -1,59 +1,142 @@
 name: Publish Docker image
+
 on:
   workflow_dispatch:
   release:
     types: [published]
+
+env:
+  # Use docker.io for Docker Hub if empty
+  REGISTRY: ghcr.io
+  # github.repository as <account>/<repo>
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
-  push_to_registry:
+  build:
     name: Push Docker image to GitHub Packages
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          #- linux/arm64
     steps:
       -
-        name: Checkout
-        uses: actions/checkout@v3
-      -
-        name: Prepare tags
-        id: prepare_tags
+        name: Prepare
         run: |
-          REPOSITORY=ghcr.io
-          DOCKER_IMAGE=tchapi/davis
-          VERSION=edge
-          if [[ $GITHUB_REF == refs/tags/* ]]; then
-            VERSION=${GITHUB_REF#refs/tags/}
-          fi
-          TAGS="${REPOSITORY}/${DOCKER_IMAGE}:${VERSION}"
-          if [ "${{ github.event_name }}" = "push" ]; then
-            TAGS="$TAGS,${REPOSITORY}/${DOCKER_IMAGE}:sha-${GITHUB_SHA::8}"
-          fi
-          echo "version=${VERSION}" >> $GITHUB_OUTPUT
-          echo "tags=${TAGS}" >> $GITHUB_OUTPUT
-          echo "created=$(date -u +'%Y-%m-%dT%H:%M:%SZ')" >> $GITHUB_OUTPUT
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV 
+      -
+        name: Checkout
+        uses: actions/checkout@v4
+
+      - 
+        name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          context: git
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          # "Push by digest" needs an untagged ref
+          tags: |
+            type=raw,value=
+
       -
         name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@v3
 
       -
         name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: v0.12.0
       -
-        name: Login to GitHub Container Registry
-        uses: docker/login-action@v2
+        name: Login to GitHub Container Registry (${{ env.REGISTRY }})
+        uses: docker/login-action@v3
         with:
-          registry: ghcr.io
-          username: ${{ github.repository_owner }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+
       -
-        name: Build and Push to GitHub Packages
-        id: docker_build
-        uses: docker/build-push-action@v3
+        name: Build and Push by digest
+        id: build
+        uses: docker/build-push-action@v5
         with:
-          platforms: linux/amd64,linux/arm64
+          context: .
           file: docker/Dockerfile
-          pull: true
-          push: true
-          tags: ${{ steps.prepare_tags.outputs.tags }}
-          labels: |
-            org.opencontainers.image.source=${{ github.event.repository.html_url }}
-            org.opencontainers.image.created=${{ steps.prepare_tags.outputs.created }}
-            org.opencontainers.image.version=${{ steps.prepare_tags.outputs.version }}
-            org.opencontainers.image.revision=${{ github.sha }}
+          platforms: ${{ matrix.platform }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          annotations: ${{ steps.meta.outputs.annotations }}
+          outputs: type=image,name=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+
+      -
+        name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"          
+      -
+        name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    runs-on: ubuntu-latest
+    needs:
+      - build
+    steps:
+      -
+        name: Checkout  # needed to get the git information
+        uses: actions/checkout@v4
+
+      -
+        name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+        with:
+          version: v0.12.0
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        # env:
+        #   DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
+        with:
+          context: git
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern=test{{version}}
+            type=edge,branch=${{ github.ref_name }}
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      -
+        name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create \
+            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            --annotation manifest:org.opencontainers.image.created=${{ steps.meta.outputs.annotations['manifest:org.opencontainers.image.created'] }} \
+            --annotation manifest:org.opencontainers.image.description="${{ steps.meta.outputs.annotations['manifest:org.opencontainers.image.description'] }}" \
+            $(printf '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}@sha256:%s ' *)          
+      -
+        name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.version }}