name: Push
on:
  push:

jobs:
  build-and-push-container-image:
    runs-on: ubuntu-latest
    env:
      REGISTRY: ghcr.io
    steps:
      - uses: actions/checkout@v2

      - name: Set environment variables
        run: |
          echo "IMAGE_NAME=$(echo "$REGISTRY/$GITHUB_REPOSITORY" | tr '[:upper:]' '[:lower:]')" >> $GITHUB_ENV
          echo "GIT_SHA=$(echo ${{ github.sha }} | cut -c1-7)" >> $GITHUB_ENV
          if [[ "${{ github.ref }}" == "refs/heads/"* ]]; then
            GIT_REF=$(echo "${{ github.ref }}" | cut -d/ -f3)
          else
            GIT_REF=$(echo "${{ github.ref }}" | cut -d/ -f3)
          fi
          echo "GIT_REF=${GIT_REF}" >> $GITHUB_ENV
          echo "IMAGE_TAG=${GIT_REF}-${GIT_SHA}" >> $GITHUB_ENV

      - name: Docker Build
        run: docker build --tag ${IMAGE_NAME}:${IMAGE_TAG} --build-arg BUILD_ENV=github --build-arg GIT_REF=${GIT_REF} --build-arg GIT_SHA=${GIT_SHA} .

      - name: Docker Login
        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login $REGISTRY -u "${{ github.actor }}" --password-stdin

      - name: Docker Push (Tagged)
        run: docker push ${IMAGE_NAME}:${IMAGE_TAG}

      - name: Tag image as latest
        run: docker tag ${IMAGE_NAME}:${IMAGE_TAG} ${IMAGE_NAME}:latest

      - name: Docker Push (Latest)
        run: docker push ${IMAGE_NAME}:latest