name: Docker build and push

on:
  push:
    branches: [ master ]
  workflow_dispatch:

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Login to ghcr registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ secrets.GH_USERNAME }}
          password: ${{ secrets.GH_ACCESS_TOKEN }}

      - name: Prepare version info
        run: |
          echo "LATEST_COMMIT_SHA=$(git rev-parse --short HEAD)" >> $GITHUB_ENV

      - name: Build and push Docker images
        uses: docker/build-push-action@v2.2.2
        with:
          context: .
          file: ./Dockerfile
          tags: |
            ghcr.io/studentiunimi/overleaf-registration:${{ env.LATEST_COMMIT_SHA }}
            ghcr.io/studentiunimi/overleaf-registration:latest
          push: true