Inaccessible native source code without modulemap

[mbektchiev]

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 6.3.0

Describe the bug
A user reported the following bug:

When building for iOS, we are trying to invoke a class named MiSnapSDKViewController, which inherits from UIViewController.

This class is defined in /src/platforms/ios/src/MiSnapSDKViewController.m

We are able to build, without error (as long as we do not attempt to access this class), as well as able to generate typings without error.

TNS_TYPESCRIPT_DECLARATIONS_PATH="$(pwd)/typings" tns build ios
all of the frameworks are found in the /typings but NOTHING from the /src/platforms/ios/src/ folder.
Also, the class does not appear accessible at run time. But adding the same files to the /demo/App_Resources produces an Xcode error of duplicate classes.

How do we make the MiSnapSDKViewController accessible from Nativescript?

It turned out that they didn't have a module.modulemap file which is necessary for the native code to be picked up by metadata generator and to become callable from JavaScript.

CLI should detect such cases and raise a warning in order to make discovering them much easier and earlier.

[dtopuzov]

Will be shipped with nativescript@6.4.0