ci-docker.yaml

---
name: Build Docker Image

on: [push, workflow_dispatch]

jobs:
  downstream:
    # This job reads $DOCKER_BUILDS to look for any downstream docker containers that
    # depend on this branch and adds matrix jobs to build them in parallel.
    runs-on: ubuntu-latest
    outputs:
      matrix: ${{ steps.set-matrix.outputs.matrix }}
    steps:
      - id: set-matrix
        run: |
          echo "matrix={\"include\":$(echo "${{ vars.DOCKER_BUILDS }}" | yq -o=json -I 0 e '.branches.${{ github.ref_name }} // [{"name":"magfest/ubersystem:${{ github.ref_name }}", "plugins":[]}]' -)}" >> $GITHUB_OUTPUT
          cat $GITHUB_OUTPUT

  build_downstream:
    needs: downstream
    strategy:
      matrix: ${{ fromJson(needs.downstream.outputs.matrix) }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Code
        uses: actions/checkout@v1

      - name: Login to GHCR
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - run: |
          echo -n "plugins=" >> $GITHUB_ENV
          echo '${{ toJSON(matrix.plugins) }}' | jq -c >> $GITHUB_ENV

      - name: Build and Push Docker Image
        uses: docker/build-push-action@v4
        with:
          build-args: PLUGINS=${{ env.plugins }}
          context: "."
          push: true
          tags: ghcr.io/${{ matrix.name }}

  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Code
        uses: actions/checkout@v1

      - name: Login to GHCR
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Build and Push Docker Image
        uses: docker/build-push-action@v2
        with:
          context: "."
          push: true
          tags: ghcr.io/${{ github.repository }}:${{ github.ref_name }}