Added support for webpack stats JSON output

Author: winkerVSbecks

packages/@angular/cli/commands/build.ts

@@ -31,10 +31,26 @@ export const baseBuildCommandOptions: any = [
     description: 'define the output filename cache-busting hashing mode',
     aliases: ['oh']
   },
+  { name: 'json', type: Boolean, default: false },
 ];
 
 export interface BuildTaskOptions extends BuildOptions {
   watch?: boolean;
+  watcher?: string;
+  supressSizes: boolean;
+  baseHref?: string;
+  aot?: boolean;
+  sourcemap?: boolean;
+  vendorChunk?: boolean;
+  verbose?: boolean;
+  progress?: boolean;
+  i18nFile?: string;
+  i18nFormat?: string;
+  locale?: string;
+  deployUrl?: string;
+  outputHashing?: string;
+  extractCss?: boolean | null;
+  json?: boolean;
 }
 
 const BuildCommand = Command.extend({

packages/@angular/cli/tasks/build.ts

@@ -7,6 +7,7 @@ import { BuildTaskOptions } from '../commands/build';
 import { NgCliWebpackConfig } from '../models/webpack-config';
 import { getWebpackStatsConfig } from '../models/webpack-configs/utils';
 import { CliConfig } from '../models/config';
+const fs = require('fs');
 
 
 export default Task.extend({
@@ -36,6 +37,15 @@ export default Task.extend({
           return;
         }
 
+        if (!runTaskOptions.watch && runTaskOptions.json) {
+          const jsonStats = stats.toJson('verbose');
+
+          fs.writeFileSync(
+            path.resolve(project.root, outputPath, '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());
+}