add webpack bundle analyzer to production output

1 files changed, 14 insertions, 0 deletions

diff --git a/config/webpack.config.js b/config/webpack.config.js
index 15899993874..e754f68553a 100644
--- a/config/webpack.config.js
+++ b/config/webpack.config.js
@@ -5,12 +5,14 @@ var path = require('path');
 var webpack = require('webpack');
 var StatsPlugin = require('stats-webpack-plugin');
 var CompressionPlugin = require('compression-webpack-plugin');
+var BundleAnalyzerPlugin = require('webpack-bundle-analyzer').BundleAnalyzerPlugin;
 
 var ROOT_PATH = path.resolve(__dirname, '..');
 var IS_PRODUCTION = process.env.NODE_ENV === 'production';
 var IS_DEV_SERVER = process.argv[1].indexOf('webpack-dev-server') !== -1;
 var DEV_SERVER_PORT = parseInt(process.env.DEV_SERVER_PORT, 10) || 3808;
 var DEV_SERVER_LIVERELOAD = process.env.DEV_SERVER_LIVERELOAD !== 'false';
+var WEBPACK_REPORT = process.env.WEBPACK_REPORT;
 
 var config = {
   context: path.join(ROOT_PATH, 'app/assets/javascripts'),
@@ -120,4 +122,16 @@ if (IS_DEV_SERVER) {
   config.output.publicPath = '//localhost:' + DEV_SERVER_PORT + config.output.publicPath;
 }
 
+if (WEBPACK_REPORT) {
+  config.plugins.push(
+    new BundleAnalyzerPlugin({
+      analyzerMode: 'static',
+      generateStatsFile: true,
+      openAnalyzer: false,
+      reportFilename: path.join(ROOT_PATH, 'webpack-report/index.html'),
+      statsFilename: path.join(ROOT_PATH, 'webpack-report/stats.json'),
+    })
+  );
+}
+
 module.exports = config;