name: Docker

on:
  push:
    branches:
    - "handmade"
  pull_request:
    branches:
    - "handmade"
  release:
    types:
    - published

permissions:
    contents: read

jobs:
    # Builds the shared base image: the whole Rust workspace compiled once.
    # Every service image (currently only pushd) is derived from this so the
    # workspace is built a single time per release. On non-release events this
    # still runs as a compile check, but nothing is pushed.
    base:
        runs-on: ubuntu-latest
        steps:
            - name: Checkout
              uses: actions/checkout@v4
            - name: Set up Docker Buildx
              uses: docker/setup-buildx-action@v3
            - name: Resolve registry host and owner
              id: registry
              # Owner is lowercased: Docker repository names must be lowercase.
              run: |
                  echo "host=${GITHUB_SERVER_URL#*://}" >> "$GITHUB_OUTPUT"
                  echo "owner=$(echo "$GITHUB_REPOSITORY_OWNER" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
            - name: Base image ref
              id: base
              run: echo "image=${{ steps.registry.outputs.host }}/${{ steps.registry.outputs.owner }}/handmade-revolt-base" >> "$GITHUB_OUTPUT"
            - name: Login to registry
              uses: docker/login-action@v3
              if: github.event_name == 'release'
              with:
                  registry: ${{ steps.registry.outputs.host }}
                  username: ${{ secrets.PACKAGE_PUBLISH_USERNAME }}
                  password: ${{ secrets.PACKAGE_PUBLISH_TOKEN }}
            - name: Build base image
              uses: docker/build-push-action@v6
              with:
                  context: .
                  file: Dockerfile
                  push: ${{ github.event_name == 'release' }}
                  platforms: linux/amd64
                  # Pinned to the commit so the publish job below consumes this
                  # exact base.
                  tags: |
                      ${{ steps.base.outputs.image }}:latest
                      ${{ steps.base.outputs.image }}:${{ github.sha }}

    # Builds individual service images from the base. Only runs on release.
    publish:
        needs: [base]
        runs-on: ubuntu-latest
        if: github.event_name == 'release'
        strategy:
            matrix:
                # Only pushd is built. To add more services later, add
                # entries here (paths/images mirror the upstream revolt layout):
                #   - { project: delta,   path: crates/delta,            image: handmade-revolt-server  }
                #   - { project: bonfire, path: crates/bonfire,          image: handmade-revolt-bonfire }
                #   - { project: autumn,  path: crates/services/autumn,  image: handmade-revolt-autumn  }
                #   - { project: january, path: crates/services/january, image: handmade-revolt-january }
                #   - { project: crond,   path: crates/daemons/crond,    image: handmade-revolt-crond   }
                include:
                    - { project: pushd, path: crates/daemons/pushd, image: handmade-revolt-pushd }
        name: Build ${{ matrix.project }} image
        steps:
            - name: Checkout
              uses: actions/checkout@v4
            - name: Set up Docker Buildx
              uses: docker/setup-buildx-action@v3
            - name: Resolve registry host and owner
              id: registry
              # Owner is lowercased: Docker repository names must be lowercase,
              # but the org (e.g. HMC) may be uppercase.
              run: |
                  echo "host=${GITHUB_SERVER_URL#*://}" >> "$GITHUB_OUTPUT"
                  echo "owner=$(echo "$GITHUB_REPOSITORY_OWNER" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
            - name: Docker meta
              id: meta
              uses: docker/metadata-action@v5
              with:
                  images: ${{ steps.registry.outputs.host }}/${{ steps.registry.outputs.owner }}/${{ matrix.image }}
                  tags: |
                      type=semver,pattern={{version}}
                      type=semver,pattern={{major}}.{{minor}}
                      type=raw,value=latest
              env:
                  DOCKER_METADATA_ANNOTATIONS_LEVELS: manifest,index
            - name: Login to registry
              uses: docker/login-action@v3
              with:
                  registry: ${{ steps.registry.outputs.host }}
                  username: ${{ secrets.PACKAGE_PUBLISH_USERNAME }}
                  password: ${{ secrets.PACKAGE_PUBLISH_TOKEN }}
            - name: Build and publish
              uses: docker/build-push-action@v6
              with:
                  context: .
                  file: ${{ matrix.path }}/Dockerfile
                  push: true
                  platforms: linux/amd64
                  build-args: |
                      BASE_IMAGE=${{ steps.registry.outputs.host }}/${{ steps.registry.outputs.owner }}/handmade-revolt-base:${{ github.sha }}
                  tags: ${{ steps.meta.outputs.tags }}
                  annotations: ${{ steps.meta.outputs.annotations }}
                  labels: ${{ steps.meta.outputs.labels }}