transfer.sh/.github/workflow/buildx.yml

# ref: https://github.com/crazy-max/diun/blob/master/.github/workflows/build.yml

name: Docker
on: [push]
jobs:
  build:
    runs-on: ubuntu-18.04
    steps:
      - name: Prepare
        id: prepare
        run: |
          if [[ $GITHUB_REF == refs/tags/* ]]; then
            echo ::set-output name=version::${GITHUB_REF#refs/tags/v}
          elif [[ $GITHUB_REF == refs/heads/master ]]; then
            echo ::set-output name=version::latest
          elif [[ $GITHUB_REF == refs/heads/* ]]; then
            echo ::set-output name=version::${GITHUB_REF#refs/heads/}
          else
            echo ::set-output name=version::snapshot
          fi
          echo ::set-output name=docker_platforms::linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64/v8,linux/386
          echo ::set-output name=docker_image::${{ secrets.DOCKER_USERNAME }}/${{ github.event.repository.name }}
        # https://github.com/crazy-max/ghaction-docker-buildx
      - name: Set up Docker Buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v1
        with:
          version: latest

      - name: Environment
        run: |
          echo home=$HOME
          echo git_ref=$GITHUB_REF
          echo git_sha=$GITHUB_SHA
          echo version=${{ steps.prepare.outputs.version }}
          echo image=${{ steps.prepare.outputs.docker_image }}
          echo platforms=${{ steps.prepare.outputs.docker_platforms }}
          echo avail_platforms=${{ steps.buildx.outputs.platforms }}
        # https://github.com/actions/checkout
      - name: Checkout
        uses: actions/checkout@v2

      - name: Docker Buildx (no push)
        run: |
          docker buildx bake \
            --set ${{ github.event.repository.name }}.platform=${{ steps.prepare.outputs.docker_platforms }} \
            --set ${{ github.event.repository.name }}.output=type=image,push=false \
            --set ${{ github.event.repository.name }}.tags="${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}" \
            --file Dockerfile
      - name: Docker Login
        if: success()
        env:
          DOCKER_PASSWORD: ${{ secrets.DOCKER_PASSWORD }}
        run: |
          echo "${DOCKER_PASSWORD}" | docker login --username "${{ secrets.DOCKER_USERNAME }}" --password-stdin
      - name: Docker Buildx (push)
        if: success()
        run: |
          docker buildx bake \
            --set ${{ github.event.repository.name }}.platform=${{ steps.prepare.outputs.docker_platforms }} \
            --set ${{ github.event.repository.name }}.output=type=image,push=true \
            --set ${{ github.event.repository.name }}.tags="${{ steps.prepare.outputs.docker_image }}:${{ steps.prepare.outputs.version }}" \
            --file docker-compose.yaml
      - name: Clear
        if: always()
        run: |
          rm -f ${HOME}/.docker/config.json