# This is a GitHub workflow defining a set of jobs with a set of steps.
# ref: https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions
#
name: Publish

on:
  pull_request:
    paths-ignore:
      - "docs/**"
      - "**.md"
      - "**.rst"
      - ".github/workflows/*"
      - "!.github/workflows/release.yml"
      - ".pre-commit-config.yaml"
  push:
    paths-ignore:
      - "docs/**"
      - "**.md"
      - "**.rst"
      - ".github/workflows/*"
      - "!.github/workflows/release.yml"
      - ".pre-commit-config.yaml"
    branches-ignore:
      - "dependabot/**"
      - "pre-commit-ci-update-config"
    tags:
      - "**"
  workflow_dispatch:

jobs:
  build-n-publish:
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-python@v4
        with:
          python-version: "3.9"

      - name: install build requirements
        run: |
          pip install build
          pip freeze

      - name: build release
        run: |
          python -m build --sdist --wheel .
          ls -l dist

      # ref: https://github.com/actions/upload-artifact#readme
      - uses: actions/upload-artifact@v3
        with:
          name: repo2docker-${{ github.sha }}
          path: "dist/*"
          if-no-files-found: error

      # 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@v1.6.4
        with:
          password: ${{ secrets.PYPI_PASSWORD }}

  publish-docker:
    runs-on: ubuntu-22.04
    env:
      DEFAULT_REGISTRY: quay.io
      IMAGE_NAME: jupyterhub/repo2docker

    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 [ "${{ startsWith(github.ref, 'refs/tags/') || (github.ref == 'refs/heads/main') }}" = "true" ]; then
              REGISTRY=$DEFAULT_REGISTRY
          else
              REGISTRY=localhost:5000
          fi
          echo "REGISTRY=$REGISTRY" >> $GITHUB_ENV
          echo "Publishing to $REGISTRY"

      # versioneer requires the full git history for non-tags
      - uses: actions/checkout@v3
        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@v2

      - name: Set up Docker Buildx (for multi-arch builds)
        uses: docker/setup-buildx-action@v2
        with:
          # Allows pushing to registry on localhost:5000
          driver-opts: network=host

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

      # 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 }}/${{ env.IMAGE_NAME }}:$VERSION"
          if [ "${{ github.ref }}" == "refs/heads/main" ]; then
            TAGS="$TAGS,${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:main"
          fi
          if [ "${{ startsWith(github.ref, 'refs/tags/') }}" = "true" ]; then
            TAGS="$TAGS,${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest"
          fi

          echo "TAGS=$TAGS"
          echo "TAGS=$TAGS" >> $GITHUB_ENV

      - name: Build and push repo2docker
        uses: docker/build-push-action@v3
        with:
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ env.TAGS }}