From 6b920fa5e6f4e3ddf0afb78a3764ff86134c5462 Mon Sep 17 00:00:00 2001
From: John-David Dalton <john.david.dalton@gmail.com>
Date: Fri, 12 Apr 2013 13:15:44 -0700
Subject: [PATCH] Don't prefix paths with drive letters with dots in
 `mkdirpSync`. [closes #238]

Former-commit-id: dd0c8d7b1906210e5f26604d4149ba542727c78d
---
 build/util.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/build/util.js b/build/util.js
index d882e9533..851eb55aa 100755
--- a/build/util.js
+++ b/build/util.js
@@ -9,6 +9,9 @@
   /** Load other modules */
   var _ = require('../lodash.js');
 
+  /** Used to indicate if running in Windows */
+  var isWindows = process.platform == 'win32';
+
   /*--------------------------------------------------------------------------*/
 
   /**
@@ -17,7 +20,7 @@
    * @memberOf util.path
    * @type String
    */
-  var sep = path.sep || (process.platform == 'win32' ? '\\' : '/');
+  var sep = path.sep || (isWindows ? '\\' : '/');
 
   /**
    * The escaped path separator used for inclusion in RegExp strings.
@@ -27,6 +30,9 @@
    */
   var sepEscaped = sep.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
 
+  /** Used to determine if a path is prefixed with a drive letter, dot, or slash */
+  var rePrefixed = RegExp('^(?:' + (isWindows ? '[a-zA-Z]:|' : '') + '\\.?)' + sepEscaped);
+
   /*--------------------------------------------------------------------------*/
 
   /**
@@ -39,7 +45,7 @@
    */
   function mkdirpSync(dirname, mode) {
     // ensure relative paths are prefixed with `./`
-    if (!RegExp('^\\.?' + sepEscaped).test(dirname)) {
+    if (!rePrefixed.test(dirname)) {
       dirname = '.' + sep + dirname;
     }
     dirname.split(sep).reduce(function(currPath, segment) {