name: Build and push Docker image upon release

on:
  push:
    branches:
      - 3.x
  release:
    types: [published]

jobs:
  push_to_registry:
    name: Build and push Docker image to Docker Hub
    runs-on: ubuntu-22.04

    steps:
      - name: Check out the repo with the latest code
        uses: actions/checkout@v4

      - 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_PASSWORD }}

      - name: Get the current tag
        id: currentTag
        run: git fetch --prune --unshallow && TAG=$(git describe --tags --abbrev=0) && echo $TAG && echo "TAG="$TAG >> "$GITHUB_ENV"

      - name: Build and push Docker image
        uses: docker/build-push-action@v6
        with:
          context: .
          push: true
          tags: |
            ${{ secrets.DOCKERHUB_REPOSITORY }}:latest
            ${{ secrets.DOCKERHUB_REPOSITORY }}:${{ env.TAG }}