name: Cloud Hypervisor's Docker image update

on:
  push:
    branches: main
    paths: resources/Dockerfile
  pull_request:
    paths: resources/Dockerfile

jobs:
  main:
    runs-on: ubuntu-latest
    steps:
      - name: Code checkout
        uses: actions/checkout@v2

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v1

      - name: Login to DockerHub
        if: ${{ github.event_name == 'push' }}
        uses: docker/login-action@v1 
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v3
        with:
          # list of Docker images to use as base name for tags
          images: cloudhypervisor/dev
          # generate Docker tags based on the following events/attributes
          tags: |
            type=raw,value={{date 'YYYYMMDD'}}-0
            type=sha

      - name: Build and push
        if: ${{ github.event_name == 'push' }}
        uses: docker/build-push-action@v2
        with:
          file: ./resources/Dockerfile
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}

      - name: Build only
        if: ${{ github.event_name == 'pull_request' }}
        uses: docker/build-push-action@v2
        with:
          file: ./resources/Dockerfile
          platforms: linux/amd64,linux/arm64
          tags: ${{ steps.meta.outputs.tags }}

      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}