Error with LiveSync

[Stefano]

Hi,
I'm debugging on an Android device (Moto G3, Marshmallow) connected via USB, using the CLI, of course, and PHPStorm as IDE. I deploy the app with 'appbuilder deploy android --debug', then (successfully) activate the live sync with 'appbuilder livesync --watch'. Nonetheless, as soon as I save changes on the computer (MAC, El Capitan) I get this error:  

TypeError: Cannot read property 'wait' of null
    at FiberFuture.Future.wait (/usr/local/lib/node_modules/appbuilder/node_modules/fibers/future.js:535:15)
    at /usr/local/lib/node_modules/appbuilder/lib/common/services/usb-livesync-service-base.js:61:42
    at /usr/local/lib/node_modules/appbuilder/lib/common/fiber-bootstrap.js:10:13
    - - - - -
    at /usr/local/lib/node_modules/appbuilder/lib/common/services/usb-livesync-service-base.js:268:68
    at Function.settle (/usr/local/lib/node_modules/appbuilder/node_modules/fibers/future.js:249:26)
    at FiberFuture.Future.wait (/usr/local/lib/node_modules/appbuilder/node_modules/fibers/future.js:534:10)
    at /usr/local/lib/node_modules/appbuilder/lib/common/services/usb-livesync-service-base.js:61:42
    at /usr/local/lib/node_modules/appbuilder/lib/common/fiber-bootstrap.js:10:13

 

Suggestions? Am I doing something wrong?

 

In addition, even if I don't explicitly activate the livesync, when I tap the three fingers on the screen the app updates, but not to the code I've modified on my computer. Where does it take the code then?

Thanks,
Stefano

[Rosen Vladimirov]

Hello Stefano,

Thank you for the shared details. I've successfully reproduced the issue on my side and we plan to release a fix for it in the incoming days. 

Meanwhile you can fix it on your side. Just follow the steps below:
1) Find where your appbuilder-cli is installed - $ ls -l `which appbuilder` could help you.
2) In the installation directory, navigate to lib/common/services and open usb-livesync-service-base.js
3) Navigate to line 305 where you'll find return null and replace the preparePlatformSync with the following code:

UsbLiveSyncServiceBase.prototype.preparePlatformForSync = function (platform) {
    return require("fibers/future").fromResult();
};

Now you'll be able to use the $ appbuilder livesync --watch command.

As per the three-finger livesync, you have to execute $ appbuilder livesync cloud after saving your changes. This will send the files in the cloud and after that you can use three-finger sync on the device. The operation will pull the files from the cloud. You have to call $ appbuilder livesync cloud whenever you save your files.

Once again I would like to thank you for reporting this issue. I've update your Telerik Points as a small sign of our appreciation for your efforts.

Feel free to contact us in case you have any other problems or concerns.

Regards,
Rosen Vladimirov
Telerik