name: docker

on:
  push:
    branches:
      - "main"
  release:
    types: [published]

jobs:
  docker:
    if: github.repository == 'psf/black'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

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

      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Check + set version tag
        run:
          echo "GIT_TAG=$(git describe --candidates=0 --tags 2> /dev/null || echo
          latest_non_release)" >> $GITHUB_ENV

      - name: Build and push
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: pyfound/black:latest,pyfound/black:${{ env.GIT_TAG }}

      - name: Build and push latest_release tag
        if: ${{ github.event_name == 'release' && github.event.action == 'created' }}
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: pyfound/black:latest_release

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}