name: Build Docker image

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  docker:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: true
      matrix:
        arch:
          - amd64
          - arm64
        version:
          - buster
          - bullseye
          - bookworm
        variant:
          - ""
          - -slim
    steps:
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Login to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Build and push
        uses: docker/build-push-action@v5
        with:
          push: true
          tags: eumau/debian:${{ matrix.version }}${{ matrix.variant }}
          platforms: linux/${{ matrix.arch }}
          build-args: |
            TARGET_ARCH=${{ matrix.arch }}