Added support for webpack stats JSON output

Author: winkerVSbecks

packages/angular-cli/commands/build.ts

@@ -19,6 +19,7 @@ export interface BuildOptions {
   deployUrl?: string;
   outputHashing?: string;
   extractCss?: boolean | null;
+  json?: boolean;
 }
 
 const BuildCommand = Command.extend({
@@ -54,7 +55,8 @@ const BuildCommand = Command.extend({
       values: ['none', 'all', 'media', 'bundles'],
       description: 'define the output filename cache-busting hashing mode'
     },
-    { name: 'extract-css',    type: Boolean, default: true }
+    { name: 'extract-css',    type: Boolean, default: true },
+    { name: 'json',           type: Boolean, default: false },
   ],
 
   run: function (commandOptions: BuildOptions) {

packages/angular-cli/tasks/build-webpack.ts

@@ -6,6 +6,7 @@ import { BuildOptions } from '../commands/build';
 import { NgCliWebpackConfig } from '../models/webpack-config';
 import { getWebpackStatsConfig } from '../models/';
 import { CliConfig } from '../models/config';
+const fs = require('fs');
 
 
 export default Task.extend({
@@ -51,6 +52,15 @@ export default Task.extend({
           return;
         }
 
+        if (!runTaskOptions.watch && runTaskOptions.json) {
+          const jsonStats = stats.toJson('verbose');
+
+          fs.writeFileSync(
+            path.resolve(project.root, outputDir, 'stats.json'),
+            JSON.stringify(jsonStats, null, 2)
+          );
+        }
+
         if (stats.hasErrors()) {
           reject();
         } else {

tests/e2e/tests/build/json.ts

@@ -0,0 +1,10 @@
+import {ng} from '../../utils/process';
+import {expectFileToExist} from '../../utils/fs';
+import {expectGitToBeClean} from '../../utils/git';
+
+
+export default function() {
+  return ng('build', '--json')
+    .then(() => expectFileToExist('./dist/stats.json'))
+    .then(() => expectGitToBeClean());
+}