Merge pull request #127 from npmSteven/refactor/multi-platform

Approved: Solid multi-platform Docker workflow using digest-merge pattern. Enables ARM64 support.

.github/workflows/docker-publish.yml

@@ -8,9 +8,65 @@ permissions:
   contents: read
 
 jobs:
-  docker:
-    name: Build & Push Docker Image
+  build:
+    name: Build (${{ matrix.platform }})
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            platform_pair: linux-amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            platform_pair: linux-arm64
+            runner: ubuntu-24.04-arm
+    env:
+      IMAGE_NAME: diegosouzapw/omniroute
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          target: runner-base
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,name=${{ env.IMAGE_NAME }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=omniroute-runner-base-${{ matrix.platform_pair }}
+          cache-to: type=gha,mode=max,scope=omniroute-runner-base-${{ matrix.platform_pair }}
+
+      - 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-${{ matrix.platform_pair }}
+          path: ${{ runner.temp }}/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    name: Merge manifest and publish tags
     runs-on: ubuntu-latest
+    needs: build
+    env:
+      IMAGE_NAME: diegosouzapw/omniroute
     steps:
       - name: Checkout
         uses: actions/checkout@v6
@@ -23,8 +79,12 @@ jobs:
           echo "version=$VERSION" >> "$GITHUB_OUTPUT"
           echo "Publishing Docker image version: $VERSION"
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - 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
@@ -32,18 +92,20 @@ jobs:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
-      - name: Build and push
-        uses: docker/build-push-action@v6
-        with:
-          context: .
-          target: runner-base
-          push: true
-          tags: |
-            diegosouzapw/omniroute:${{ steps.version.outputs.version }}
-            diegosouzapw/omniroute:latest
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          platforms: linux/amd64
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Create manifest list and push
+        working-directory: ${{ runner.temp }}/digests
+        run: |
+          docker buildx imagetools create \
+            -t "${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }}" \
+            -t "${{ env.IMAGE_NAME }}:latest" \
+            $(printf '${{ env.IMAGE_NAME }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect "${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }}"
 
       - name: Update Docker Hub description
         uses: peter-evans/dockerhub-description@v5