Please add a @NgModule annotation in AOT Compilation

Type of Issue

[x] Bug Report
[ ] Feature Request

Description

After compiling the package and runing ng serve --aot , I get this error

ERROR in Error: Unexpected value 'NgProgressModule in .........../ngx-progressbar/node_modules/@ngx-progressbar/core/src/ng-progress.module.d.ts' imported by the module 'AppModule in .............../ngx-progressbar/src/app/app.module.ts'. Please add a @NgModule annotation.

How To Reproduce

The module looks like this

import { NgModule, ModuleWithProviders } from '@angular/core';
import { CommonModule } from '@angular/common';
import { NgProgressBarComponent } from './components/ng-progress-bar/ng-progress-bar.component';
import { NgProgressComponent } from './components/ng-progress/ng-progress.component';
import { NgProgress } from './services/ng-progress.service';

@NgModule({
  declarations: [
    NgProgressComponent,
    NgProgressBarComponent
  ],
  exports: [
    NgProgressComponent
  ],
  imports: [
    CommonModule
  ],
  providers: [
    NgProgress
  ]
})
export class NgProgressModule {
}

Expected Behaviour

Should work as it does in ng serve

Version Information

ng-packagr: v2.0.0-rc.4
node: v8.4.0
@angular: v5.0.0
rxjs: 5.5.x
zone.js: 0.8.14

[JoeQueR]

Don’t know if it helps, but i had the same issue :

Turns out, my generated metadata [library].metadata.json was empty (no modules definitions, exported components was missing, etc…) wich work fines without aot activated… 😦

Does your metadatas contains data to your NgProgressModule ?

My ng-package.json was refering to public_api.ts, which was exporting “barrel” files (index.ts) wich themself was referencing other barrel files. But rather than exporting with the full path to barrel files index.ts, i was exporting the directory :

old public_api.ts : export * from "/my-app/directory"

new public_api.ts : export * from "/my-app/directory/index"

It’s really important to specify explicitly the barrel file, in order to have metadata set correctly. One way to correct it is to simply remove the barrels files and export everithing in public_api.ts

After that, i had problems with cyclic depedencies and barel files… But that’s an another story.

Hope it help !

[SaturnTeam]

You should add this to FAQ. It takes a month to find this solution