name: Docker
on:
  push:
    branches:
      - main
  pull_request:
    paths:
      - 'Dockerfile'
      - 'docker/**'
      - '.github/workflows/docker.yml'

jobs:
  buildx:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v2
      - name: Set up QEMU
        id: qemu
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Buildx
        id: buildx
        uses: docker/setup-buildx-action@v1
        with:
          config-inline: |
            [worker.oci]
              max-parallelism = 2
      - name: Inspect builder
        run: |
          echo "Name:      ${{ steps.buildx.outputs.name }}"
          echo "Endpoint:  ${{ steps.buildx.outputs.endpoint }}"
          echo "Status:    ${{ steps.buildx.outputs.status }}"
          echo "Flags:     ${{ steps.buildx.outputs.flags }}"
          echo "Platforms: ${{ steps.buildx.outputs.platforms }}"
      - name: Build images on pull requests
        if: ${{ github.event_name == 'pull_request' }}
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/amd64,linux/arm64,linux/arm/v7
      - name: Login to Docker Hub
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
        uses: docker/login-action@v1
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Login to GitHub Container registry
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}
      - name: Build and push images on commits to main
        if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/main' }}
        uses: docker/build-push-action@v2
        with:
          context: .
          platforms: linux/amd64,linux/arm64,linux/arm/v7
          push: true
          tags: |
            gogs/gogs:latest
            ghcr.io/gogs/gogs:latest