cdk/.github/workflows/docker-publish-arm.yml

name: Publish Docker Image ARM64

on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag to build and publish'
        required: true
        default: 'latest'

env:
  REGISTRY: docker.io
  IMAGE_NAME: cashubtc/mintd

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4

      - 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: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest,enable=${{ github.event_name == 'release' }}
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=ref,event=branch
            type=ref,event=pr
            type=sha
            ${{ github.event.inputs.tag != '' && github.event.inputs.tag || '' }}

      # Build and push ARM64 image with architecture suffix
      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          platforms: linux/arm64
          file: ./Dockerfile.arm
          tags: ${{ steps.meta.outputs.tags }}-arm64
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max

      # Create and push multi-arch manifest if both images exist
      - name: Create and push multi-arch manifest
        run: |
          # For each tag in the metadata output
          echo "${{ steps.meta.outputs.tags }}" | while read -r tag; do
            # Check if AMD64 image exists
            if docker manifest inspect $tag-amd64 >/dev/null 2>&1; then
              # Create manifest
              docker manifest create $tag \
                $tag-amd64 \
                $tag-arm64

              # Annotate the manifest with architecture specific information
              docker manifest annotate $tag $tag-amd64 --arch amd64
              docker manifest annotate $tag $tag-arm64 --arch arm64

              # Push the manifest
              docker manifest push $tag
            else
              echo "AMD64 image not found for $tag, skipping manifest creation"
            fi
          done