name: docker

on:
  push:
    branches: [main]
  workflow_dispatch:

env:
  REGISTRY: git.jfritzsche.de
  IMAGE_PREFIX: git.jfritzsche.de/${{ github.repository_owner }}

jobs:
  docker:
    name: Docker – Build & Push (Packages)
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: An der Gitea-Container-Registry anmelden
        run: >
          echo "${{ secrets.REGISTRY_TOKEN }}" |
          docker login "$REGISTRY" -u "${{ github.repository_owner }}" --password-stdin

      - name: Image bauen
        run: >
          docker build .
          -t "$IMAGE_PREFIX/jf-homepage:latest"
          -t "$IMAGE_PREFIX/jf-homepage:${{ github.sha }}"

      - name: Image in die Registry pushen
        run: |
          docker push "$IMAGE_PREFIX/jf-homepage:latest"
          docker push "$IMAGE_PREFIX/jf-homepage:${{ github.sha }}"

      - name: Veraltete Image-Tags auf dem Runner aufräumen
        run: >
          docker images --format '{{.Repository}}:{{.Tag}}'
          | grep "^$IMAGE_PREFIX/jf-homepage:"
          | grep -v -e ':latest$' -e ':${{ github.sha }}$'
          | xargs -r docker rmi
          || true

      - name: Logout
        run: docker logout "$REGISTRY"