feat: lib.externals support.

integration/sample_core/ng-package.json

@@ -1,6 +1,9 @@
 {
   "$schema": "../../ng-package.schema.json",
   "lib": {
-    "entryFile": "public_api.ts"
+    "entryFile": "public_api.ts",
+    "externals": {
+      "rxjs/operator/map": "Rx.Observable.prototype"
+    }
   }
 }

integration/sample_core/src/angular.service.ts

@@ -3,21 +3,22 @@ import { Http, Response } from '@angular/http';
 import { Observable } from 'rxjs/Observable';
 import { Subject } from 'rxjs/Subject';
 import { ReplaySubject } from 'rxjs/ReplaySubject';
-import 'rxjs/add/operator/map';
+import { map } from 'rxjs/operator/map';
 
 @Injectable()
 export class AngularService {
-  
+
   private _subject: Subject<any> = new ReplaySubject<any>(1);
 
   constructor(
     private http: Http
   ) {}
 
   public foo(): Observable<string> {
-
-    return this.http.get('/foo/bar')
-      .map((res: Response) => `${res.ok}`);
+    return map.call(
+      this.http.get('/foo/bar'),
+      (res: Response) => `${res.ok}`
+    );
   }
 
   public get bar(): Observable<any> {

lib/model/ng-package.ts

@@ -17,10 +17,9 @@ export class NgPackage {
     if (!ngPackageJson.src) this.ngPackageJson.src = '.';
     if (!ngPackageJson.dest) this.ngPackageJson.dest = 'dist';
     if (!ngPackageJson.workingDirectory) this.ngPackageJson.workingDirectory = '.ng_build';
-    if (ngPackageJson.lib) {
-      if (!ngPackageJson.lib.entryFile) this.ngPackageJson.lib.entryFile = 'src/public_api.ts';
-      //if (!ngPackageJson.lib.flatModuleFile) this.ngPackageJson.lib.flatModuleFile = 'index';
-    }
+    if (!ngPackageJson.lib) this.ngPackageJson.lib = {};
+    if (!ngPackageJson.lib.entryFile) this.ngPackageJson.lib.entryFile = 'src/public_api.ts';
+    //if (!ngPackageJson.lib.flatModuleFile) this.ngPackageJson.lib.flatModuleFile = 'index';
   }
 
   public get dest(): string {
@@ -39,6 +38,10 @@ export class NgPackage {
     return path.basename(this.ngPackageJson.lib.flatModuleFile || this.meta.name || 'index');
   }
 
+  public get libExternals(): Object {
+    return this.ngPackageJson.lib.externals || {};
+  }
+
   /** Package meta information */
   public get meta(): { name: string, scope?: string } {
     // split into name and scope (`@<scope>/<name>`)

lib/ng-packagr.ts

@@ -66,7 +66,8 @@ export const ngPackage = (opts: NgPackagrCliArguments): Promise<any> => {
         moduleName: ngPkg.meta.name,
         entry: es2015EntryFile,
         format: 'es',
-        dest: `${ngPkg.workingDirectory}/${ngPkg.artefacts.es2015}`
+        dest: `${ngPkg.workingDirectory}/${ngPkg.artefacts.es2015}`,
+        externals: ngPkg.libExternals
       })
       // XX ... rollup generates relative paths in sourcemaps. It would be nice to re-locate source map files
       // so that `@scope/name/foo/bar.ts` shows up as path in the browser...
@@ -85,7 +86,8 @@ export const ngPackage = (opts: NgPackagrCliArguments): Promise<any> => {
         moduleName: ngPkg.meta.name,
         entry: `${ngPkg.workingDirectory}/${ngPkg.artefacts.module}`,
         format: 'umd',
-        dest: `${ngPkg.workingDirectory}/${ngPkg.artefacts.main}`
+        dest: `${ngPkg.workingDirectory}/${ngPkg.artefacts.main}`,
+        externals: ngPkg.libExternals
       })
       .then(() => remapSourcemap(`${ngPkg.workingDirectory}/${ngPkg.artefacts.main}`))
     )

lib/steps/rollup.ts

@@ -6,7 +6,8 @@ export interface RollupOptions {
   moduleName: string,
   entry: string,
   format: string,
-  dest: string
+  dest: string,
+  externals: Object,
 }
 
 /**
@@ -161,7 +162,8 @@ export const rollup = (opts: RollupOptions) => {
     'rxjs/add/operator/windowWhen':     'Rx.Observable.prototype',
     'rxjs/add/operator/withLatestFrom': 'Rx.Observable.prototype',
     'rxjs/add/operator/zipAll':         'Rx.Observable.prototype',
-    'rxjs/add/operator/zipProto':       'Rx.Observable.prototype'
+    'rxjs/add/operator/zipProto':       'Rx.Observable.prototype',
+    ...opts.externals,
   };
 
   let bundleOptions = {