Monitor gRPC now sends a 'success' message to notify open port (#1742)

Author: cmaglie

Diff for: commands/daemon/daemon.go

@@ -509,6 +509,9 @@ func (s *ArduinoCoreServerImpl) Monitor(stream rpc.ArduinoCoreService_MonitorSer
 		return err
 	}
 
+	// Send a message with Success set to true to notify the caller of the port being now active
+	_ = stream.Send(&rpc.MonitorResponse{Success: true})
+
 	go func() {
 		// close port on gRPC call EOF or errors
 		defer portProxy.Close()

Diff for: rpc/cc/arduino/cli/commands/v1/monitor.pb.go

@@ -51,6 +51,9 @@ message MonitorResponse {
   // report the default settings) or after a new port_configuration is sent
   // (to report the new settings applied)
   repeated MonitorPortSetting applied_settings = 3;
+  // A message with this field set to true is sent as soon as the port is
+  // succesfully opened
+  bool success = 4;
 }
 
 message MonitorPortSetting {