Start refactoring client socket handling out into a gen_server

elibs/git_client.erl

@@ -0,0 +1,65 @@
+-module(git_client).
+-behaviour(gen_server).
+
+-record(state, {
+    socket
+  }).
+
+%% ------------------------------------------------------------------
+%% API Function Exports
+%% ------------------------------------------------------------------
+
+-export([start_link/1]).
+
+%% ------------------------------------------------------------------
+%% gen_server Function Exports
+%% ------------------------------------------------------------------
+
+-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
+
+%% ------------------------------------------------------------------
+%% API Function Definitions
+%% ------------------------------------------------------------------
+
+start_link(Socket) ->
+  gen_server:start(?MODULE, [Socket], []).
+
+%% ------------------------------------------------------------------
+%% gen_server Function Definitions
+%% ------------------------------------------------------------------
+
+init([Socket]) ->
+  inet:setopts(Socket, [{active, once}]),
+  {ok, #state{socket = Socket}}.
+
+handle_call(_Request, _From, State) ->
+  {noreply, ok, State}.
+
+handle_cast(_Msg, State) ->
+  {noreply, State}.
+
+handle_info({_SocketType, Socket, Packet}, #state{socket = Socket} = State) ->
+  case Packet of
+    <<_:4/binary, "git", _:1/binary, Rest/binary>> ->
+      [Command, Args] = binary:split(Rest, <<" ">>),
+      io:format("git command ~p; args ~p~n", [Command, Args]),
+      {noreply, State};
+    _ ->
+      gen_tcp:send(Socket, "Invalid method declaration. Upgrade to the latest git.\n"),
+      gen_tcp:close(Socket),
+      {stop, normal, State}
+  end;
+handle_info(_Info, State) ->
+  io:format("unhandled info ~p~n", [_Info]),
+  {noreply, State}.
+
+terminate(_Reason, _State) ->
+  ok.
+
+code_change(_OldVsn, State, _Extra) ->
+  {ok, State}.
+
+%% ------------------------------------------------------------------
+%% Internal Function Definitions
+%% ------------------------------------------------------------------
+