name: Publish Docker image
on:
  push:
    branches:
      - 'main'
      - 'develop'
    tags:
      - 'v*'
  pull_request:
    branches:
      - 'main'
      - 'develop'

jobs:
  publish:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
      - name: Log in to Docker registry
        uses: docker/login-action@v3.3.0
        with:
          username: ${{ secrets.DOCKER_REGISTRY_USERNAME }}
          password: ${{ secrets.DOCKER_REGISTRY_PASSWORD }}
          registry: ${{ var.REGISTRY }}
      - uses: cachix/install-nix-action@v27
        with:
          nix_path: nixpkgs=channel:nixos-unstable
      - name: Build Docker image
        run: nix develop --command -- just backend build-docker
      - name: Load Docker image
        run: docker load < result
      - name: Docker Metadata action
        uses: docker/metadata-action@v5.6.1
        with:
          image: gejdr-backend:latest
          tags:
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha
          labels: |
            org.opencontainers.image.title=Backend GéJDR
            org.opencontainers.image.description=Backend for GéJDR
            org.opencontainers.image.vendor=Lucien Cartier-Tilet <lucien@phundrak.com>