[ANGULAR-TYPSCRIPT] Error during template compile of 'SwaggerModule' Only initialized variables and constants can be referenced in decorators because the value of this variable is needed by the template compiler in 'BASE_PATH' 'BASE_PATH' references 'BASE_PATH' 'BASE_PATH' is not initialized at

Description

We generate an Typscripte Api client for Angular with this Mavenplugin https://github.com/swagger-api/swagger-codegen/tree/master/modules/swagger-codegen-maven-plugin . After that we publish the generated client code to a private npm repro. Then we integrate it into an Angular project and embed like in this tutorial: https://angular.schule/blog/2018-04-swagger-codegen .

after building the project with the folowing command
ng serve --prod

We get the follwing error:

Error during template compile of 'SwaggerModule' Only initialized variables and constants can be referenced in decorators because the value of this variable is needed by the template compiler in 'BASE_PATH' 'BASE_PATH' references 'BASE_PATH' 'BASE_PATH' is not initialized at ..

ng serve without production works totaly fine.

Swagger-codegen version

2.31

Swagger declaration file content or url

Command line used for generation

<language>typescript-angular</language> 
<output>...</output>                               
<configOptions>
         <packageName>labcom.agriportal</packageName>
          <npmName>@swagger/AgriportalProxy</npmName>
          <npmVersion>0.0.4</npmVersion>
          <snapshot>true</snapshot>    
          <ngVersion>5.2.10</ngVersion>
          <npmRepository>... </npmRepository>
</configOptions>

Steps to reproduce

1. generate Typscript Api Client for Angular 5.2.10
2. publish to npm
3. import it into an plain angular project
4. Set BASE_PATH in the AppModule like:
   import { ApiModule, BASE_PATH } from 'swaggerPackage ... providers: [{ provide: BASE_PATH, useValue: environment.API_BASE_PATH }], '
5. Build project in production mode with:
   ng serve --prod

Related issues/PRs

Suggest a fix/enhancement

Start by generating the TypeScript Angular client with swagger-codegen 2.31 using ngVersion 5.2.10, then reproduce the failure with ng serve --prod. Inspect the generated SwaggerModule and BASE_PATH usage referenced by the error, comparing production and non-production builds. Done means the generated client builds in production while still allowing BASE_PATH to be provided from the AppModule.