By default connect to existing MIDI port in repl

musique/main.cc

@@ -178,11 +178,15 @@ struct Runner
 				std::cout << "Connected MIDI output to port " << *output_port << ". Ready to play!" << std::endl;
 			}
 		} else {
-			midi.connect_output();
+			bool connected_to_existing_port = midi.connect_or_create_output();
 			if (!quiet_mode) {
+				if (connected_to_existing_port) {
+					std::cout << "Connected MIDI output to port " << midi.output->getPortName(0) << std::endl;
+				} else {
 					std::cout << "Created new MIDI output port 'Musique'. Ready to play!" << std::endl;
 				}
 			}
+		}
 
 		Env::global->force_define("say", +[](Interpreter &interpreter, std::vector<Value> args) -> Result<Value> {
 			for (auto it = args.begin(); it != args.end(); ++it) {

musique/midi/midi.hh

@@ -26,6 +26,8 @@ namespace midi
 	{
 		~Rt_Midi() override = default;
 
+		bool connect_or_create_output();
+
 		/// Connect with MIDI virtual port
 		void connect_output();
 
@@ -35,6 +37,7 @@ namespace midi
 		/// List available ports
 		void list_ports(std::ostream &out) const;
 
+
 		bool supports_output() const override;
 
 		void send_note_on (uint8_t channel, uint8_t note_number, uint8_t velocity) override;

musique/midi/rt_midi.cc

@@ -34,6 +34,22 @@ try {
 	std::exit(33);
 }
 
+bool midi::Rt_Midi::connect_or_create_output()
+try {
+	output.emplace();
+	if (auto pc = output->getPortCount()) {
+		output->openPort(0);
+		return true;
+	}
+	output->openVirtualPort("Musique");
+	return false;
+}
+catch (RtMidiError &error) {
+	// TODO(error)
+	std::cerr << "Failed to use MIDI connection: " << error.getMessage() << std::endl;
+	std::exit(33);
+}
+
 void midi::Rt_Midi::connect_output()
 try {
 	ensure(not output.has_value(), "Reconeccting is not supported yet");