name: Manual Docker release

on:
  workflow_dispatch:
    inputs:
      tag:
        name: tag name
        required: true
        default: latest
        description: Tag under which the images should be published.
      is-latest:
        name: "is latest?"
        required: true
        default: false
        description: Whether the build is also the latest version.

jobs:
  docker:
    name: Docker release
    runs-on: ubuntu-18.04
    strategy:
      fail-fast: false
      matrix:
        distro:
          - ubuntu
          - alpine
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Create Docker image
        run: |
          docker build \
              --tag pandocscholar/${{ matrix.distro }}:latest \
              --file docker/${{ matrix.distro }}.Dockerfile \
              .

      - name: Run Docker on example
        run: |
          docker run --rm \
                 --user "$(id -u):$(id -g)" \
                 --volume "$(pwd)/example:/data" \
                 pandocscholar/${{ matrix.distro }}:latest

      - name: Login to Docker Hub
        run: >-
          echo "${{ secrets.DOCKER_HUB_TOKEN }}" |
            docker login -u ${{ secrets.DOCKER_HUB_USERNAME }} --password-stdin

      - name: Push image as latest
        if: github.event.inputs.is-latest != false
        run: docker push pandocscholar/${{ matrix.distro }}:latest

      - name: Push image as tag
        run: |
          docker tag \
              pandocscholar/${{ matrix.distro }}:latest \
              pandocscholar/${{ matrix.distro }}:${{ github.event.inputs.tag }}
          docker push pandocscholar/${{ matrix.distro }}:${{ github.event.inputs.tag }}