name: release-containers
on:
  release:
    types:
      - "published"

jobs:
  publish-container-images:
    name: publish-container-images
    runs-on: ubuntu-latest
    strategy:
      matrix:
        base-image:
          - erlang
          - erlang-slim
          - erlang-alpine
          - elixir
          - elixir-slim
          - elixir-alpine
          - node
          - node-slim
          - node-alpine

    steps: 
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Authenticate with GitHub container registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: lpil
          password: ${{ secrets.CONTAINER_REGISTRY_PERSONAL_ACCESS_TOKEN }}

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Build version and tags
        id: versions
        run: |
          # Strip git ref prefix from version
          V_VERSION=$(echo "${{ github.ref }}" | sed -e 's|.*/\(.*\)|\1|')

          # Strip `v` prefix from version
          BARE_VERSION=$(echo "$V_VERSION" | sed -e 's|^v/\(.*\)|\1|')

          # Build version with platform
          PLATFORM_VERSION=$BARE_VERSION-${{ matrix.base-image }}

          # Build container tag
          TAG=ghcr.io/${{ github.repository }}:$PLATFORM_VERSION

          echo "::set-output name=v_version::$V_VERSION"
          echo "::set-output name=bare_version::$BARE_VERSION"
          echo "::set-output name=platform_version::$PLATFORM_VERSION"
          echo "::set-output name=container_tag::$TAG"

      - name: Download Gleam archive from GitHub release
        run: |
          VERSION=${{ steps.versions.outputs.v_version }}
          URL=https://github.com/${{ github.repository }}/releases/download/$VERSION/gleam-$VERSION-linux-amd64.tar.gz
          echo Downloading $URL
          curl -Lo gleam.tar.gz $URL

      - name: Unpack Gleam binary from archive
        run: tar xf gleam.tar.gz

      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          file: containers/${{ matrix.base-image }}.dockerfile
          push: true
          tags: ${{ steps.versions.outputs.container_tag }}
          labels: |
            org.opencontainers.image.title=gleam
            org.opencontainers.image.url=https://gleam.run
            org.opencontainers.image.source=https://github.com/gleam-lang/gleam
            org.opencontainers.image.version=${{ steps.versions.outputs.platform_version }}
            org.opencontainers.image.licenses=Apache-2.0