LiveSync support

[teobugslayer]

We will be enabling LiveSync support for NativeScript application and we plan to roll this out in a couple of stages.

v1.2

LiveSync commands

• livesync - This command will update all your app files and will restart the app on the device.
• livesync --watch - This command will watch for file system changes, sync only the changed files on the device and finally restart the app after the sync.
  In the 1.2 time frame we plan to have first-stage LiveSync implementation. To work, it will restart the application.

Technical details

• The following location will be used for storing and updating the app files:
  • Android - /data/local/tmp/...and /data/data/....
  • iOS - ~/Library/Application Support/LiveSync.
• We need to restart the app in order to guarantee that the application state will not be corrupted. This is highly critical on iOS because it relies on singleton instances of many application level objects.

[ligaz]

Thanks for your feedback @NathanaelA. Here are my comments:

1. Saving the current frame might work for some applications but will not work for others that depend on state. For example imagine an app that has a login screen. The ideal case will be for users to specify what kind of sync they want: restart, refresh (hard reload) or reload.
2. That will be a good optimization we can apply in one of the next iterations. I have added it to the list.

[ligaz]

Yes this feature is already available in master and the v1.2 scope for will be publicly available when we officially release v1.2.

[nmladenov]

reopening due to these issues: #654