name: Docker
# https://www.docker.com/blog/first-docker-github-action-is-here
# https://github.com/docker/build-push-action
on:
  push:
    branches: [master, "release/*"]
  release:
    types: [published]

jobs:
  publish:
    runs-on: ubuntu-20.04
    # only on releases
    if: startsWith(github.ref, 'refs/tags/') || github.event_name == 'release'
    strategy:
      fail-fast: false
      matrix:
        python_version: ["3.7", "3.8", "3.9"]
        pytorch_version: ["1.8", "1.9", "1.10"]
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Get release version
        id: get_version
        run: echo "::set-output name=RELEASE_VERSION::$(echo ${GITHUB_REF##*/})"

      - name: Publish Releases to Docker
        uses: docker/build-push-action@v1.1.0
        with:
          repository: pytorchlightning/pytorch_lightning
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
          dockerfile: dockers/release/Dockerfile
          build_args: PYTHON_VERSION=${{ matrix.python_version }},PYTORCH_VERSION=${{ matrix.pytorch_version }},LIGHTNING_VERSION=${{ steps.get_version.outputs.RELEASE_VERSION }}
          tags: "${{ steps.get_version.outputs.RELEASE_VERSION }}-py${{ matrix.python_version }}-torch${{ matrix.pytorch_version }},latest-py${{ matrix.python_version }}-torch${{ matrix.pytorch_version }}"
        timeout-minutes: 55

      - name: Publish Latest to Docker
        uses: docker/build-push-action@v1.1.0
        # only on releases and latest Python and PyTorch
        if: matrix.python_version == '3.9' && matrix.pytorch_version == '1.10'
        with:
          repository: pytorchlightning/pytorch_lightning
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}
          dockerfile: dockers/release/Dockerfile
          build_args: PYTHON_VERSION=${{ matrix.python_version }},PYTORCH_VERSION=${{ matrix.pytorch_version }},LIGHTNING_VERSION=${{ steps.get_version.outputs.RELEASE_VERSION }}
          tags: "latest"
        timeout-minutes: 55