name: ytld-sub Docker Build

on:
  push:
    # Publish `master` as Docker `latest` image.
    branches:
      - master

    # Publish `v1.2.3` tags as releases.
    tags:
      - v*

  # Run tests for any PRs.
  pull_request:

env:
  IMAGE_NAME: ytdl-sub

jobs:
  # Push image to GitHub Packages.
  # See also https://docs.docker.com/docker-hub/builds/
  push:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: [ "3.10" ]

    permissions:
      packages: write
      contents: read

    steps:
      - uses: actions/checkout@v3

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v3
        with:
          python-version: ${{ matrix.python-version }}

      - name: Build Wheel
        run: |
          pip install -e .[build]
          python setup.py bdist_wheel
          cp dist/*.whl docker/root

      - name: Build Docker Image
        run: docker build --tag $IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}" docker/

      - name: login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Push image on master or release
        run: |
          if [[ ${{ github.ref }} =~ ^refs\/heads\/master|^refs\/tags\/v.* ]]; then
            IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME

            # Change all uppercase to lowercase
            IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
            # Strip git ref prefix from version
            VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
            # Strip "v" prefix from tag name
            [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
            # Use Docker `latest` tag convention
            [ "$VERSION" == "master" ] && VERSION=latest
            echo IMAGE_ID=$IMAGE_ID
            echo VERSION=$VERSION
            docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
            docker push $IMAGE_ID:$VERSION
          else
            echo "Skipped on PRs"
          fi