fix(@schematics/angular): npm install at the end of ng g universal

Author: vikerman

packages/schematics/angular/universal/index.ts

@@ -25,6 +25,9 @@ import {
   template,
   url,
 } from '@angular-devkit/schematics';
+import {
+  NodePackageInstallTask,
+} from '@angular-devkit/schematics/tasks';
 import * as ts from 'typescript';
 import { findNode, getDecoratorMetadata } from '../utility/ast-utils';
 import { InsertChange } from '../utility/change';
@@ -208,6 +211,11 @@ export default function (options: UniversalOptions): Rule {
     const clientArchitect = getClientArchitect(host, options);
     const outDir = getTsConfigOutDir(host, clientArchitect);
     const tsConfigExtends = basename(clientArchitect.build.options.tsConfig);
+
+    if (!options.skipInstall) {
+      context.addTask(new NodePackageInstallTask());
+    }
+
     const templateSource = apply(url('./files'), [
       template({
         ...strings,

packages/schematics/angular/universal/index_spec.ts

@@ -109,4 +109,11 @@ describe('Universal Schematic', () => {
     const contents = tree.readContent(filePath);
     expect(contents).toMatch(/document.addEventListener\('DOMContentLoaded', \(\) => {/);
   });
+
+  it('should install npm dependencies', () => {
+    schematicRunner.runSchematic('universal', defaultOptions, appTree);
+    expect(schematicRunner.tasks.length).toBe(1);
+    expect(schematicRunner.tasks[0].name).toBe('node-package');
+    expect((schematicRunner.tasks[0].options as {command: string}).command).toBe('install');
+  });
 });

packages/schematics/angular/universal/schema.d.ts

@@ -43,4 +43,8 @@ export interface Schema {
      * The name of the root module class.
      */
     rootModuleClassName?: string;
+    /**
+     * Skip installing dependency packages.
+     */
+    skipInstall?: boolean;
 }

packages/schematics/angular/universal/schema.json

@@ -52,6 +52,11 @@
       "type": "string",
       "description": "The name of the root module class.",
       "default": "AppServerModule"
+    },
+    "skipInstall": {
+      "description": "Skip installing dependency packages.",
+      "type": "boolean",
+      "default": false
     }
   },
   "required": [