Generate stats.json for Webpack Analyser (http://webpack.github.io/an…

…alyse/)

[closes #790]

.gitignore

@@ -6,3 +6,4 @@ database.sqlite
 node_modules
 ncp-debug.log
 npm-debug.log
+stats.json

package.json

@@ -208,6 +208,7 @@
     "deploy": "babel-node tools/run deploy",
     "render": "babel-node tools/run render",
     "serve": "babel-node tools/run runServer",
-    "start": "babel-node tools/run start"
+    "start": "babel-node tools/run start",
+    "stats": "babel-node tools/run stats"
   }
 }

tools/stats.js

@@ -0,0 +1,47 @@
+/**
+ * React Starter Kit (https://www.reactstarterkit.com/)
+ *
+ * Copyright © 2014-present Kriasoft, LLC. All rights reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE.txt file in the root directory of this source tree.
+ */
+
+import webpack from 'webpack';
+import { writeFile } from 'fs';
+import { open } from 'openurl';
+import webpackConfig from './webpack.config';
+
+const WEBPACK_ANALYSER_URL = 'http://webpack.github.io/analyse/';
+/**
+ * Creates application stats for client bundle.
+ */
+function clientStats() {
+  return new Promise((resolve, reject) => {
+    const clientConfig = {
+      ...webpackConfig[0],
+      profile: true,
+    };
+
+    webpack(clientConfig).run((err, stats) => {
+      if (err) {
+        reject(err);
+        return;
+      }
+
+      const statsJson = JSON.stringify(stats.toJson(), null, 2);
+      writeFile('stats.json', statsJson, 'utf-8', (saveErr) => {
+        if (saveErr) {
+          console.error(saveErr.message);
+          reject(saveErr);
+          return;
+        }
+        console.log(`Now you can load \`stats.json\` into page at ${WEBPACK_ANALYSER_URL}`);
+        open(WEBPACK_ANALYSER_URL);
+        resolve(stats);
+      });
+    });
+  });
+}
+
+export default clientStats;