name: Build and publish Docker image

on:
  push:
    branches: master

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2
      - name: Checkout submodules
        run: git submodule update --init --recursive
      - name: Set up docker buildx
        id: buildx
        uses: crazy-max/ghaction-docker-buildx@v3
        with:
          buildx-version: latest
          qemu-version: latest
      - name: Login to docker registry
        run: |
          docker login --username ${{ secrets.DOCKER_USERNAME }} --password ${{ secrets.DOCKER_TOKEN }}
      - name: Run buildx
        run: |
          docker buildx build \
            --tag berthubert/galmon \
            --platform linux/386,linux/amd64,linux/arm/v7,linux/arm64/v8 \
            --output "type=registry" \
            --build-arg MAKE_FLAGS=-j1 \
            --file Dockerfile \
            .