implement custom require ignore regex - closes #72

lib/6to5/index.js

@@ -5,7 +5,7 @@ var _         = require("lodash");
 exports.util = require("./util");
 
 exports.register = function () {
-  require("./register");
+  return require("./register");
 };
 
 exports.polyfill = function () {

lib/6to5/register.js

@@ -6,9 +6,11 @@ var old  = require.extensions[".js"];
 
 // TODO: source maps - Error.prepareStackTrace override
 
+var ignoreRegex = /node_modules/;
+
 require.extensions[".js"] =
 require.extensions[".es6"] = function (m, filename) {
-  if (filename.indexOf("node_modules") >= 0) {
+  if (ignoreRegex && ignoreRegex.test(filename)) {
     return old.apply(this, arguments);
   }
 
@@ -20,3 +22,7 @@ require.extensions[".es6"] = function (m, filename) {
 
   m._compile(result.code, filename);
 };
+
+module.exports = function (_ignoreRegex) {
+  ignoreRegex = _ignoreRegex;
+};