build-image.yml

name: Build image

on:
  push:
    branches:
      - main
    tags:
      - v*

env:
  GITHUB_CONTAINER_REGISTRY_IMAGE: ghcr.io/marp-team/marp-cli
  DOCKER_HUB_REGISTRY_IMAGE: marpteam/marp-cli

jobs:
  build:
    runs-on: ${{ matrix.runner }}

    strategy:
      fail-fast: false
      matrix:
        include:
          - runner: ubuntu-latest
            platform: linux/amd64

          # TODO: Change to ARM64 runner for open-sourced project if available (M1 Mac cannot run Docker due to lack of nested virtualization)
          - runner: ubuntu-latest
            platform: linux/arm64

    steps:
      - name: Prepare
        run: |
          platform=${{ matrix.platform }}
          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

      - uses: actions/checkout@v4

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.GITHUB_CONTAINER_REGISTRY_IMAGE }}
            ${{ env.DOCKER_HUB_REGISTRY_IMAGE }}

      # TODO: It is removable if ARM64 runner is available
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_PASSWORD }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and push by digest
        id: build
        uses: docker/build-push-action@v6
        with:
          platforms: ${{ matrix.platform }}
          labels: ${{ steps.meta.outputs.labels }}
          outputs: 'type=registry,"name=${{ env.GITHUB_CONTAINER_REGISTRY_IMAGE }},${{ env.DOCKER_HUB_REGISTRY_IMAGE }}",push-by-digest=true,name-canonical=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: Download digests
        uses: actions/download-artifact@v4
        with:
          path: /tmp/digests
          pattern: digests-*
          merge-multiple: true

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: |
            ${{ env.GITHUB_CONTAINER_REGISTRY_IMAGE }}
            ${{ env.DOCKER_HUB_REGISTRY_IMAGE }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_HUB_USERNAME }}
          password: ${{ secrets.DOCKER_HUB_PASSWORD }}

      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Create manifest list and push
        working-directory: /tmp/digests
        run: |
          docker buildx imagetools create $(jq -cr '.tags | map(select(startswith("${{ env.GITHUB_CONTAINER_REGISTRY_IMAGE }}")) | "-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.GITHUB_CONTAINER_REGISTRY_IMAGE }}@sha256:%s ' *)
          docker buildx imagetools create $(jq -cr '.tags | map(select(startswith("${{ env.DOCKER_HUB_REGISTRY_IMAGE }}")) | "-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
            $(printf '${{ env.DOCKER_HUB_REGISTRY_IMAGE }}@sha256:%s ' *)

      - name: Inspect image
        run: |
          docker buildx imagetools inspect ${{ env.GITHUB_CONTAINER_REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}
          docker buildx imagetools inspect ${{ env.DOCKER_HUB_REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}