docker-r.yaml

name: Build & Publish R Docker
on:
  push:
    paths:
    - environment/r/Dockerfile
    - environment/r/requirements.txt
    - .github/workflows/docker-r.yaml
jobs:
  docker:
    name: Build & Publish R Docker
    runs-on: ubuntu-latest
    strategy:
      matrix:
        registry:
          - docker.pkg.github.com
    env:
      IMAGE_NAME: '${{ matrix.registry }}/${{ github.repository }}/${{ github.event.repository.name }}-r'
    steps:
    - name: Checkout Repository
      uses: actions/checkout@v2
    - name: Set Environment Variables
      shell: bash
      run: |
        echo "IMAGE_VERSION=$(date --utc --iso-8601)_${GITHUB_SHA::7}" >> $GITHUB_ENV
    - name: Build Docker image
      working-directory: environment/r
      run: |
        docker build \
          --tag ${{ env.IMAGE_NAME }}:latest \
          --tag ${{ env.IMAGE_NAME }}:${{ env.IMAGE_VERSION }} \
          .
    - name: Publish Image
      if: github.ref == 'refs/heads/master' && github.event_name == 'push' && !github.event.repository.fork
      # https://help.github.com/en/packages/using-github-packages-with-your-projects-ecosystem/configuring-docker-for-use-with-github-packages
      run: |
        docker login \
          --username ${{ github.event.repository.name }} \
          --password ${{ secrets.GITHUB_TOKEN }} \
          ${{ matrix.registry }}
        docker push ${{ env.IMAGE_NAME }}:latest
        docker push ${{ env.IMAGE_NAME }}:${{ env.IMAGE_VERSION }}