name: Build and Publish Docker Image

on:
  push:
    branches:
      - main

env:
  REGISTRY: stackit-solutions.git.onstackit.cloud
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push:
    runs-on: lxc
    permissions:
      packages: write
      contents: read
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Docker
        run: |
          curl -fsSL https://get.docker.com -o get-docker.sh
          sudo sh get-docker.sh

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Log in to Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract base image version
        id: version
        run: |
          VERSION=$(sed -n 's/^FROM .*:\(.*\)$/\1/p' Dockerfile)
          echo "version=$VERSION" >> $GITHUB_OUTPUT

      - name: Build and push Docker image
        id: push
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.version.outputs.version }}