name: Build and Publish Docker Image

on:
  push:
    branches:
      - main

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: docker.io
  IMAGE_NAME: ${{ github.event.repository.name }}

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v3
        with:
          fetch-depth: 0
      - name: Get version
        id: get_version
        run: |
          GIT_VERSION=$(git describe --dirty --always --long --abbrev=7 --tags)
          VERSION="v${GIT_VERSION}"
          IMAGE_PREFIX="${{ env.REGISTRY }}/${{ secrets.DOCKERHUB_USER }}/${{ env.IMAGE_NAME }}"
          LATEST_TAG="${IMAGE_PREFIX}:latest"
          VERSION_TAG="${IMAGE_PREFIX}:${VERSION}"
          echo "VERSION=${VERSION}" >> $GITHUB_ENV
          echo "GIT_VERSION=${GIT_VERSION}" >> $GITHUB_ENV
          echo "LATEST_TAG=${LATEST_TAG}" >> $GITHUB_OUTPUT
          echo "VERSION_TAG=${VERSION_TAG}" >> $GITHUB_OUTPUT
      -
        name: Login to ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ secrets.DOCKERHUB_USER }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      -
        name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      -
        name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      -
        name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: |
            ${{ env.LATEST_TAG }}
            ${{ env.VERSION_TAG }}