on:
  workflow_call:
    inputs:
      subimage:
        required: true
        type: string
      tags:
        required: true
        type: string
    secrets:
      DOCKERHUB_USERNAME:
        required: true
      DOCKERHUB_TOKEN:
        required: true


jobs:
  build-subimage-job:
    runs-on: ubuntu-latest
    steps:
      -
        name: Checkout
        uses: actions/checkout@v3
        # We are checking out explicitly, so build-push-action isn't trying
        # to checkout the (unreachable) submodule. (Using "context" there.)
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2
      -
        name: Login to Docker Hub
        uses: docker/login-action@v2
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Build ${{ inputs.subimage }}
        uses: docker/build-push-action@v4
        with:
          context: .
          file: Dockerfile-${{ inputs.subimage }}
          build-args:
            DRONE_COMMIT=${{ github.sha }}
          tags: ${{ inputs.tags }}
          push: true