bouncer/.github/workflows/build-image.yaml

name: Build Docker image
on:
  pull_request:
    branches: ["*"]

env:
  REGISTRY: ghcr.io

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2

      - name: Construct tags / labels for an image
        id: meta
        uses: docker/metadata-action@v3
        with:
          images: |
            ${{ env.REGISTRY }}/${{ github.repository }}            
          tags: |
            type=sha            

      # https://docs.github.com/en/actions/learn-github-actions/workflow-commands-for-github-actions#setting-an-environment-variable
      - name: Update environment variables
        run: grep -v '^#' .env >> $GITHUB_ENV

      - name: Setup Buildx
        uses: docker/setup-buildx-action@v1

      - name: Build Docker image
        uses: docker/build-push-action@v2
        with:
          push: false
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max
          build-args: |
            OTP_VERSION=${{ env.OTP_VERSION }}
            THRIFT_VERSION=${{ env.THRIFT_VERSION }}
            SERVICE_NAME=${{ env.SERVICE_NAME }}