name: Docker Image CI

on:
  push:
    branches:
      - master

jobs:

  build:
 
    runs-on: ubuntu-latest
 
    steps:
    - uses: actions/checkout@v1
    - name: Build the Docker image
      run: docker build . --file Dockerfile --tag backup-server:latest
    - name: Login to GitHub Package Repository
      env:
        GH_TOKEN: ${{ secrets.GITHUB_PAT }}
      run: docker login docker.pkg.github.com -u amdavidson -p ${GH_TOKEN}
    - name: Tag the Docker image
      run: |
        docker tag backup-server:latest docker.pkg.github.com/amdavidson/backup-server/backup-server:$(date +%s)
        docker tag backup-server:latest docker.pkg.github.com/amdavidson/backup-server/backup-server:${GITHUB_SHA:0:39}
    - name: Push the Docker image
      run: docker push docker.pkg.github.com/amdavidson/backup-server/backup-server
    - name: Tag latest if master
      if: github.ref == 'refs/heads/master'
      run: |
        # we push latest separate so it shows up as latest in the UI
        docker tag backup-server:latest docker.pkg.github.com/amdavidson/backup-server/backup-server:latest
        docker push docker.pkg.github.com/amdavidson/backup-server/backup-server:latest