From ba1a27c90f6d18b7f3c824903f9d6c0447db74da Mon Sep 17 00:00:00 2001
From: Sebastian McKenzie <sebmck@gmail.com>
Date: Mon, 29 Sep 2014 20:38:26 +1000
Subject: [PATCH] exclude node_modules by default with register method

---
 lib/6to5/node.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/6to5/node.js b/lib/6to5/node.js
index 4f6fdf9ea5..9903b24c18 100644
--- a/lib/6to5/node.js
+++ b/lib/6to5/node.js
@@ -5,8 +5,14 @@ var _         = require("lodash");
 exports.browserify = require("./browserify");
 exports.middleware = require("./middleware");
 
-exports.register = function () {
+exports.register = function (includeNodeModules) {
+  var old = require.extensions[".js"];
+
   require.extensions[".js"] = function (m, filename) {
+    if (!includeNodeModules && filename.indexOf("node_modules") >= 0) {
+      return old.apply(this, arugments);
+    }
+
     m._compile(exports.transformFileSync(filename, {
       sourceMap: true
     }), filename);