Allow upload without specifing port, even if the board requires 1200-bps-touch...

Allow upload without specifing port, even if the board requires 1200-bps-touch on the serial port (#1263)

commands/upload/upload.go

@@ -296,9 +296,8 @@ func runProgramAction(pm *packagemanager.PackageManager,
 		// Perform reset via 1200bps touch if requested
 		if uploadProperties.GetBoolean("upload.use_1200bps_touch") {
 			if port == "" {
-				return fmt.Errorf("no upload port provided")
-			}
-
+				outStream.Write([]byte(fmt.Sprintln("Skipping 1200-bps touch reset: no serial port selected!")))
+			} else {
 				ports, err := serial.GetPortsList()
 				if err != nil {
 					return fmt.Errorf("cannot get serial port list: %s", err)
@@ -318,6 +317,7 @@ func runProgramAction(pm *packagemanager.PackageManager,
 					}
 				}
 			}
+		}
 
 		// Wait for upload port if requested
 		if uploadProperties.GetBoolean("upload.wait_for_upload_port") {