def visualize_build_request(build_root, goals, subjects):
scheduler, storage = setup_json_scheduler(build_root)
execution_request = scheduler.build_request(goals, subjects)
# NB: Calls `reduce` independently of `execute`, in order to render a graph before validating it.
engine = LocalSerialEngine(scheduler, storage)
engine.start()
try:
engine.reduce(execution_request)
visualize_execution_graph(scheduler, storage, execution_request)
finally:
engine.close()
