How can i fix this build error when using the --prod flag for an Angular app(library)?

Forgive me, but I am on a difficult project and don't understand much about it. I have done some research and it has not helped resolve. Given this class:

    import { Injector, Type, InjectionToken, AbstractType, InjectFlags } from '@angular/core';    let _appInjector: Injector;    // The AppInjector would normally consist only of the setAppInjector function and the exportet variable:  //   export let AppInjector: Injector;  // Because Karma/Jasmine unit tests have problems accessing exportet variables, the AppInjector  // implementation is changed into a class with a static "get" method. In that way, unit tests work and  // existing implementations can stay unchanged.    export class AppInjector {    static get<T>(token: Type<T> | InjectionToken<T> | AbstractType<T>, notFoundValue?: T, flags?: InjectFlags): T {      return _appInjector.get(token, notFoundValue, flags);    }  }    export function setAppInjector(injector: Injector): void {    if (_appInjector === undefined) {      _appInjector = injector;    }  }    export function appInjector<T>(    token: Type<T> | InjectionToken<T> | AbstractType<T>,    notFoundValue?: T,    flags?: InjectFlags  ) {    return function (target: any, key: string | symbol) {      const getter = function () {        const injectable = AppInjector.get(token, notFoundValue, flags);        return injectable;      };    const setter = (value: any) => {    console.error('Not allowed to set a decorated app-injector.');  };    Object.defineProperty(target, key, {    get: getter,    set: setter,    enumerable: true,    configurable: true      });    };  }  

I get the following error when building with --prod:

    Building entry point '@dn/vcp-core-lib'  ------------------------------------------------------------------------------  × Compiling TypeScript sources through NGC  ERROR: C:/repo/Diebold/bay-bridge/libs/vcp-core-lib/src/lib/common/app-injector.ts:11:1: Error encountered in metadata generated for exported symbol 'AppInjector':   C:/repo/Diebold/bay-bridge/libs/vcp-core-lib/src/lib/common/app-injector.ts:3:5: Metadata collected contains an error that will be reported at runtime: Reference to a local (non-exported) symbol '_appInjector'. Consider exporting the symbol.    {"__symbolic":"error","message":"Reference to a local symbol","line":2,"character":4,"context":{"name":"_appInjector"}}  C:/repo/Diebold/bay-bridge/libs/vcp-core-lib/src/lib/common/app-injector.ts:11:1: Error encountered in metadata generated for exported symbol 'AppInjector':   C:/repo/Diebold/bay-bridge/libs/vcp-core-lib/src/lib/common/app-injector.ts:3:5: Metadata collected contains an error that will be reported at runtime: Reference to a local (non-exported) symbol '_appInjector'. Consider exporting the symbol.    {"__symbolic":"error","message":"Reference to a local symbol","line":2,"character":4,"context":{"name":"_appInjector"}}  

I tried sinmply exporting _appInjector, but that only leads to another error. It is expecting a value on the initalization of _appInjector. I tried setting its' value to new AppInjector (from angular/core) but that is an abstract class that can't be instantiated. Any ideas or requests for more information are welcome, but I really don't understand what this class is even doing.

https://stackoverflow.com/questions/67236676/how-can-i-fix-this-build-error-when-using-the-prod-flag-for-an-angular-applib April 24, 2021 at 04:49AM