name: docker-build

on:
  push:
    branches:
      - '**'
    paths:
      - .github/workflows/labrinth-docker.yml
      - 'apps/labrinth/**'
      - Cargo.toml
      - Cargo.lock
  pull_request:
    types: [opened, synchronize]
    paths:
      - .github/workflows/labrinth-docker.yml
      - 'apps/labrinth/**'
      - Cargo.toml
      - Cargo.lock
  merge_group:
    types: [checks_requested]

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: 📥 Check out code
        uses: actions/checkout@v4

      - name: 🧰 Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: ⚙️ Generate Docker image metadata
        id: docker_meta
        uses: docker/metadata-action@v5
        env:
          # GitHub Packages requires annotations metadata in at least the index descriptor to show them
          # up properly in its UI it seems, but it's not clear about it, because the docs refer to the
          # image manifest only. See:
          # https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#adding-a-description-to-multi-arch-images
          DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
        with:
          images: ghcr.io/modrinth/labrinth
          labels: |
            org.opencontainers.image.title=labrinth
            org.opencontainers.image.description=Modrinth API
            org.opencontainers.image.licenses=AGPL-3.0-only
          annotations: |
            org.opencontainers.image.title=labrinth
            org.opencontainers.image.description=Modrinth API
            org.opencontainers.image.licenses=AGPL-3.0-only

      - name: 🔑 Login to GitHub Packages
        uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: 🔨 Build and push
        uses: docker/build-push-action@v6
        with:
          file: ./apps/labrinth/Dockerfile
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.docker_meta.outputs.tags }}
          labels: ${{ steps.docker_meta.outputs.labels }}
          annotations: ${{ steps.docker_meta.outputs.annotations }}
          build-args: |
            GIT_HASH=${{ fromJSON(steps.docker_meta.outputs.json).labels['org.opencontainers.image.revision'] }}
          cache-from: type=registry,ref=ghcr.io/modrinth/labrinth:main
          cache-to: type=inline