name: Docker image build

on:
  push:
    branches: [ "main" ]
    # Publish semver tags as releases.
    paths:
      - '**.php'
      - 'composer.*'
      - 'config/**'
      - '.github/**'
      - 'Procfile'
      - 'project.toml'
  pull_request:
    branches: [ "main" ]

env:
  PACK_VERSION: "0.27.0"
  COMPOSER_AUTH: "{\"github-oauth\":{\"github.com\":\"${{ secrets.HVG_DEV_GH_TOKEN }}\"}}"

jobs:
  pack-example:
    name: Pack Build and Publish!
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v1
    - uses: andrioid/setup-pack@v1.0.1
    - name: Docker registry login
      uses: docker/login-action@v1
      with:
        registry: ghcr.io/hvg
        username: hvg-dev
        password: ${{ secrets.HVG_DEV_GH_TOKEN }}
    - name: Set build environment
      run: |
        year=$(date +%Y);
        month=$(date +%m);
        ref="${GITHUB_REF#refs/*/}";
        echo "REF=$ref" >> $GITHUB_ENV;
        tag="${GITHUB_REF#tags/*/}";
        [[ $tag == '' ]] || tag="${year}.${month}.${{ github.run_number }}";
        echo "TAG=$tag" >> $GITHUB_ENV;
    - name: Setup Pack
      run: |
        echo "Installing pack ${PACK_VERSION}"
        mkdir -p "${PWD}/bin"
        curl \
          --show-error \
          --silent \
          --location \
          --fail \
          --retry 3 \
          --connect-timeout 5 \
          --max-time 60 \
          "https://github.com/buildpacks/pack/releases/download/v${PACK_VERSION}/pack-v${PACK_VERSION}-linux.tgz" \
        | tar -C "${PWD}/bin" -xz pack
    - name: Build Image with pack
      run: |
        bin/pack build "ghcr.io/hvg/blog:$TAG" \
          --builder heroku/buildpacks:20 \
          --descriptor project.toml \
          --workspace /app \
          --env COMPOSER_AUTH=$COMPOSER_AUTH;
    - name: Tag Docker image to ref
      run: |
        docker tag ghcr.io/hvg/blog:$TAG ghcr.io/hvg/blog:$REF
    - name: Docker push
      run: |
        docker push ghcr.io/hvg/blog:$TAG
        docker push ghcr.io/hvg/blog:$REF