name: Docker Build + Image Push

on:
  push:
    branches:
      - master
  pull_request:


jobs:
  build:
    name: Build Image
    runs-on: ubuntu-latest
    env:
        REGISTRY: ghcr.io
        IMAGE_TAG: ghcr.io/tdlight-team/tdlightbotapi

    steps:
      - name: Checkout current repo
        uses: actions/checkout@v2
        with:
            submodules: "recursive"

      - name: Get version
        run: |
          # Get latest commit short hash
          HASH_VERSION=$(git rev-parse --short HEAD)

          # Strip git ref prefix from version
          VERSION=$(echo "${{ github.ref }}" | sed -e 's,.*/\(.*\),\1,')
        
          # Strip "v" prefix from tag name
          [[ "${{ github.ref }}" == "refs/tags/"* ]] && VERSION=$(echo $VERSION | sed -e 's/^v//')
        
          # Use Docker `latest` tag convention
          [ "$VERSION" == "master" ] && VERSION=latest
 
          # Convert IMAGE_ID and VERSION to lowercase (repository name must be lowercase)
          IMAGE_ID=$(echo "$IMAGE_ID" | awk '{print tolower($0)}')
          HASH_VERSION=$(echo "$HASH_VERSION" | awk '{print tolower($0)}')
          VERSION=$(echo "$VERSION" | awk '{print tolower($0)}')

          # Store variable for future use
          echo "HASH_VERSION=$HASH_VERSION" >> $GITHUB_ENV
          echo "VERSION=$VERSION" >> $GITHUB_ENV

          # Print debug info
          echo "hash version: $HASH_VERSION"
          echo "version: $VERSION"

      - name: Build image
        run: |
          docker build \
            --cache-from $IMAGE_TAG:latest \
            --tag $IMAGE_TAG:$HASH_VERSION \
            --tag $IMAGE_TAG:$VERSION \
            .

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

      - name: Push images
        run: |
          docker push $IMAGE_TAG:$VERSION
          docker push $IMAGE_TAG:$HASH_VERSION

      - name: Logout from registry
        run: |
          docker logout $REGISTRY