Build multi-platform docker images (#139)

Author: keynmol

.github/workflows/ci.yml

@@ -10,6 +10,7 @@ env:
   JAVA_OPTS: "-Xmx4G"
   JVM_OPTS: "-Xmx4G"
   SBT_OPTS: "-Xmx4G"
+  REGISTRY_IMAGE: keynmol/sn-vcpkg
 
 jobs:
   build:
@@ -144,38 +145,113 @@ jobs:
           SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
           SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
 
-  release_docker:
-    name: Push Docker image to Docker Hub
-    needs: [build]
-    if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
+  docker:
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+    if: github.event_name == 'pull_request' 
     steps:
-      - name: Check out the repo
+      - name: Checkout
         uses: actions/checkout@v3
-      
-      - name: Log in to Docker Hub
-        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+
+      - name: Build
+        id: build
+        uses: docker/build-push-action@v4
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_PASSWORD }}
-      
-      - name: Extract metadata (tags, labels) for Docker
+          push: false
+          file: ./modules/sn-vcpkg-docker/Dockerfile
+          context: .
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }}
+
+  docker_release_build:
+    runs-on: ubuntu-latest
+    if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Docker meta
         id: meta
-        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        uses: docker/metadata-action@v4
         with:
-          images: |
-            keynmol/sn-vcpkg
-          tags: |
-            type=ref,event=branch
-            type=ref,event=pr
-            type=semver,pattern={{version}}
-            type=sha
-      
-      - name: Build and push Docker image
-        uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671
+          images: ${{ env.REGISTRY_IMAGE }}
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v4
         with:
           context: .
           file: ./modules/sn-vcpkg-docker/Dockerfile
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
+          platforms: ${{ matrix.platform }}
           labels: ${{ steps.meta.outputs.labels }}
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},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@v3
+        with:
+          name: digests
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+  
+  docker_release_merge:
+    runs-on: ubuntu-latest
+    needs: [docker_release_build]
+    if: github.event_name != 'pull_request' && (startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main')
+    steps:
+      -
+        name: Download digests
+        uses: actions/download-artifact@v3
+        with:
+          name: digests
+          path: /tmp/digests
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+      -
+        name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_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") \
+            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)          
+      -
+        name: Inspect image
+        run: |
+          docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}