context-engine-images.yml

name: Context Engine Images

# Builds and pushes the optional context-engine Docker images (server+worker and
# the one-shot migrate) as multi-arch images to GHCR. Rides the same "Publish"
# event as the app so they're versioned together. The future app-managed engine
# (Phase 6) pulls these by the release tag.
on:
  release:
    types: [published]
  workflow_dispatch:
    inputs:
      version:
        description: "Version tag to publish (e.g. 0.1.0)."
        required: false

permissions:
  contents: read
  packages: write

jobs:
  build-push:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          # server + worker: built from the repo root (needs the root go.mod).
          - name: context-engine
            context: .
            dockerfile: services/context-engine/Dockerfile
          # one-shot Atlas migrations: built from the service dir.
          - name: context-engine-migrate
            context: services/context-engine
            dockerfile: services/context-engine/Dockerfile.migrate
    steps:
      - uses: actions/checkout@v4

      - uses: docker/setup-qemu-action@v3

      - uses: docker/setup-buildx-action@v3

      - uses: docker/login-action@v3
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Image metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ghcr.io/${{ github.repository }}/${{ matrix.name }}
          tags: |
            type=semver,pattern=v{{version}}
            type=raw,value=${{ github.event.inputs.version }},enable=${{ github.event_name == 'workflow_dispatch' && github.event.inputs.version != '' }}
            type=raw,value=latest,enable=${{ github.event_name == 'release' }}
            type=sha,format=short

      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          context: ${{ matrix.context }}
          file: ${{ matrix.dockerfile }}
          platforms: linux/amd64,linux/arm64
          # Push on a real release, or on a manual dispatch only when a version is
          # given. A bare workflow_dispatch is a build-only dry run (nothing pushed).
          push: ${{ github.event_name == 'release' || (github.event_name == 'workflow_dispatch' && github.event.inputs.version != '') }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          cache-from: type=gha
          cache-to: type=gha,mode=max