name: Create a release on pypi.org

on:
  push:
  pull_request:

jobs:
  build-n-publish:
    runs-on: ubuntu-18.04
    steps:
      - uses: actions/checkout@v2

      - name: "Setup Python 3.8"
        uses: actions/setup-python@v2
        with:
          python-version: "3.8"

      - name: "Install dependencies"
        run: |
          pip install --upgrade setuptools pip
          pip install --upgrade -r dev-requirements.txt
          pip freeze

      - name: "Build distribution archives"
        run: |
          python setup.py sdist bdist_wheel

      # This step is only run when a new tag is pushed
      # all previous steps always run in order to exercise them
      - name: Publish distribution to PyPI
        if: startsWith(github.ref, 'refs/tags')
        uses: pypa/gh-action-pypi-publish@master
        with:
          password: ${{ secrets.PYPI_API_TOKEN }}

  publish-docker:
    runs-on: ubuntu-20.04

    services:
      # So that we can test this in PRs/branches
      local-registry:
        image: registry:2
        ports:
          - 5000:5000

    steps:
      - name: Should we push this image to a public registry?
        run: |
          if [ "${{ startsWith(github.ref, 'refs/tags/') || (github.ref == 'refs/heads/master') }}" = "true" ]; then
              # Empty => Docker Hub
              echo "REGISTRY=" >> $GITHUB_ENV
          else
              echo "REGISTRY=localhost:5000/" >> $GITHUB_ENV
          fi

      # versioneer requires the full git history for non-tags
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      # Setup docker to build for multiple platforms, see:
      # https://github.com/docker/build-push-action/tree/v2.4.0#usage
      # https://github.com/docker/build-push-action/blob/v2.4.0/docs/advanced/multi-platform.md

      - name: Set up QEMU (for docker buildx)
        uses: docker/setup-qemu-action@25f0500ff22e406f7191a2a8ba8cda16901ca018

      - name: Set up Docker Buildx (for multi-arch builds)
        uses: docker/setup-buildx-action@2a4b53665e15ce7d7049afb11ff1f70ff1610609
        with:
          # Allows pushing to registry on localhost:5000
          driver-opts: network=host

      - name: Setup push rights to Docker Hub
        if: env.REGISTRY != 'localhost:5000/'
        run: |
          docker login -u "${{ secrets.DOCKERHUB_USERNAME }}" -p "${{ secrets.DOCKERHUB_TOKEN }}"

      # when building jupyter/repo2docker:master
      # also push jupyter/repo2docker:1.2.3-3.abcd1234 (replace + with -)
      - name: Get list of repo2docker docker tags
        run: |
          VERSION=$(python3 -c 'import versioneer; print(versioneer.get_version().replace("+", "-"))')
          TAGS="${{ env.REGISTRY }}jupyter/repo2docker:$VERSION"
          if [ "${{ github.ref }}" == "refs/heads/master" ]; then
            TAGS="$TAGS,${{ env.REGISTRY }}jupyter/repo2docker:master"
          fi
          echo "TAGS=$TAGS"
          echo "TAGS=$TAGS" >> $GITHUB_ENV

      - name: Build and push repo2docker
        uses: docker/build-push-action@e1b7f96249f2e4c8e4ac1519b9608c0d48944a1f
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ env.TAGS }}