Pipe http response straight to file

local-cli/bundle.js

@@ -3,24 +3,21 @@ var fs = require('fs');
 
 var OUT_PATH = 'iOS/main.jsbundle';
 
-function getBundle(flags, callback) {
+function getBundle(flags) {
   var options = {
     host: 'localhost',
     port: 8081,
     path: '/index.ios.bundle?dev=' + flags.dev + '&minify=' + flags.minify
   };
 
+  var file = fs.createWriteStream(OUT_PATH);
+
   console.log('Requesting bundle from local server');
   var req = http.request(options, function(res) {
-    var bundle = '';
-
-    res.on('data', function (chunk) {
-      bundle += chunk;
-    });
+    res.pipe(file);
 
     res.on('end', function () {
-      console.log('Got bundle');
-      callback(bundle);
+      console.log('Successfully saved bundle to ' + OUT_PATH);
     });
   });
 
@@ -55,14 +52,7 @@ module.exports = {
     if (flags.help) {
       showHelp();
     } else {
-      getBundle(flags, function(bundle) {
-        fs.writeFile(OUT_PATH, bundle, function(err) {
-          if(err) {
-            return console.err('Error writing bundle to file', err);
-          }
-          console.log('Successfully saved bundle to ' + OUT_PATH);
-        });
-      });
+      getBundle(flags);
     }
   }
 }