Theia Cloud Image for ARM64 #403

Author: jfaltermeier

.github/workflows/reusable-docker.yml

@@ -12,6 +12,10 @@ on:
       docker_file:
         required: true
         type: string
+      platforms:
+        required: false
+        type: string
+        default: "linux/amd64,linux/arm64"
     secrets:
       dockerhub_username:
         required: true
@@ -73,10 +77,23 @@ jobs:
             echo "latest_tag=${{ inputs.docker_org }}/${{ inputs.docker_image }}:latest" >> $GITHUB_OUTPUT
           fi
 
-      # Only build when we will publish, so either a main merge with next-version or a release
-      - name: Build Docker image
-        if: github.event_name == 'push' && steps.version_check.outputs.is_next_version == 'true' || github.event_name == 'release'
-        run: docker build -t ${{ steps.get_tags.outputs.version_tag }} -f ${{ inputs.docker_file }} .
+      # Set up QEMU for multi-architecture builds
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@49b3bc8e6bdd4a60e6116a5414239cba5943d3cf # v3.2.0
+
+      # Set up Docker Buildx for multi-architecture builds
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@c47758b77c9736f4b2ef4073d4d51994fabfe349 # v3.7.1
+        with:
+          install: true
+          driver: docker-container
+          driver-opts: |
+            image=moby/buildkit:latest
+            network=host
+
+      # List available platforms
+      - name: List docker buildx available platforms
+        run: docker buildx inspect --bootstrap
 
       # Only log in to dockerhub when we will publish, so either a main merge with next-version or a release
       - name: Login to DockerHub
@@ -86,20 +103,41 @@ jobs:
           username: ${{ secrets.dockerhub_username }}
           password: ${{ secrets.dockerhub_token }}
 
-      # Push for main merges with next version
-      - name: Push Docker tags (for push events with next version)
+      # Build (and push) for main merges with next version
+      - name: Build and push Docker image (push event)
         if: github.event_name == 'push' && steps.version_check.outputs.is_next_version == 'true'
-        run: |
-          docker push ${{ steps.get_tags.outputs.version_tag }}
-          docker tag ${{ steps.get_tags.outputs.version_tag }} ${{ steps.get_tags.outputs.sha_tag }}
-          docker push ${{ steps.get_tags.outputs.sha_tag }}
+        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355 # v6.10.0
+        with:
+          context: .
+          file: ${{ inputs.docker_file }}
+          push: true
+          tags: |
+            ${{ steps.get_tags.outputs.version_tag }}
+            ${{ steps.get_tags.outputs.sha_tag }}
+          platforms: ${{ inputs.platforms }}
 
-      # Push for releases
-      - name: Push Docker tags (for release events)
+      # Build (and push) for releases
+      - name: Build and push Docker image (release event)
         if: github.event_name == 'release'
-        run: |
-          docker push ${{ steps.get_tags.outputs.version_tag }}
-          docker tag ${{ steps.get_tags.outputs.version_tag }} ${{ steps.get_tags.outputs.latest_tag }}
-          docker push ${{ steps.get_tags.outputs.latest_tag }}
-          docker tag ${{ steps.get_tags.outputs.version_tag }} ${{ steps.get_tags.outputs.next_tag }}
-          docker push ${{ steps.get_tags.outputs.next_tag }}
+        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355 # v6.10.0
+        with:
+          context: .
+          file: ${{ inputs.docker_file }}
+          push: true
+          tags: |
+            ${{ steps.get_tags.outputs.version_tag }}
+            ${{ steps.get_tags.outputs.latest_tag }}
+            ${{ steps.get_tags.outputs.next_tag }}
+          platforms: ${{ inputs.platforms }}
+
+      # Build for verification
+      - name: Build Docker image (verification)
+        if: github.event_name == 'push' && steps.version_check.outputs.is_next_version == 'false'
+        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355 # v6.10.0
+        with:
+          context: .
+          file: ${{ inputs.docker_file }}
+          push: false
+          tags: |
+            ${{ steps.get_tags.outputs.version_tag }}
+          platforms: linux/amd64 # only verify for fastest platform