Issue nestjs#45 fix - export custom component

Author: kamil.mysliwiec

example/modules/users/users.module.ts

@@ -8,7 +8,7 @@ import { ChatGateway } from './chat.gateway';
 @Module({
     controllers: [ UsersController ],
     components: [
-        { provide: 'UsersService', useClass: UsersService },
+        UsersService,
         ChatGateway,
     ],
 })

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nest.js",
-  "version": "1.0.5",
+  "version": "1.0.6",
   "description": "Modern, fast, powerful node.js web framework",
   "main": "index.js",
   "scripts": {

src/core/injector/module.ts

@@ -138,7 +138,7 @@ export class Module {
         });
     }
 
-    public addCustomFactory(component: CustomFactory){
+    public addCustomFactory(component: CustomFactory) {
         const { provide, name, useFactory: factory, inject } = component;
         this._components.set(name, {
             name,
@@ -150,13 +150,21 @@ export class Module {
         });
     }
 
-    public addExportedComponent(exportedComponent: Metatype<Injectable>) {
+    public addExportedComponent(exportedComponent: ComponentMetatype) {
+        if (this.isCustomComponent(exportedComponent)) {
+            this.addCustomExportedComponent(exportedComponent);
+            return;
+        }
         if (!this._components.get(exportedComponent.name)) {
             throw new UnknownExportException(exportedComponent.name);
         }
         this._exports.add(exportedComponent.name);
     }
 
+    public addCustomExportedComponent(exportedComponent: CustomFactory | CustomValue | CustomClass) {
+        this._exports.add(exportedComponent.provide);
+    }
+
     public addRoute(route: Metatype<Controller>) {
         this._routes.set(route.name, {
             name: route.name,