GenServers depends on starting another genserver (cross app)

Hello there,

I have a little follow up question for mi previous question referencing here. For small recap:

I was triing to make one library supervisor free for sake of reducing complexity, what worked quite well. The main problem was that it was used in ambrela where some applications were starting some server from lib and some were not and I need to awoid process already started while keep ability to take service and run it on its own. (server are quite memory heavy)

So today problem is that that memory heavy servers now need a start one server, server should by started of group of aplication in umbrella start at least one of the mentioned memory heavy servers. From mi point of view, the easiest solution would by to just make every memory heavy server supervisor which would start self and the dependent server, which would have name and would also use the already_started Process link trick:

def start_link(_ \\ nil) do
    __MODULE__
    |> GenServer.start_link(:ok, name: __MODULE__)
    |> start_link_response()
end

defp start_link_response({:error, {:already_started, pid}}) do
    true = Process.link(pid)
    {:ok, pid}
  end

defp start_link_response(response), do: response

Bat it seems somehow smelly, is there any more elixirish solution?