name: Build check (reusable)

# Build-only `docker build` sanity check for ONE app domain, reused via
# `uses:` by pr-build.yml and the deploy-dev workflows -- the monorepo port of
# each app repo's build.yml. Still deliberately NOT a live boot+healthz check:
# that was tried in the split repos and repeatedly hit this runner's own
# environment quirks (bridge-IP reachability, non-unique $$, squatted host
# ports) without ever going reliably green. Image boot is verified by hand
# instead (docker run + alembic + /healthz 200 + a real /api/v2/place 200).
#
# Monorepo port: the domain (backend|frontend) arrives as a workflow_call
# input, and the build CONTEXT is that domain's subdirectory -- so each
# Dockerfile sees exactly the tree it saw when its domain was a repo root,
# byte-for-byte the same build as the split era.

on:
  workflow_call:
    inputs:
      domain:
        description: "App domain to build: backend | frontend"
        required: true
        type: string

jobs:
  build:
    runs-on: docker
    steps:
      - uses: actions/checkout@v4

      - name: Install Docker CLI
        run: |
          apt-get update -qq
          apt-get install -y -qq docker.io

      - name: Build
        run: docker build -t thermograph-${{ inputs.domain }}:ci ${{ inputs.domain }}/