From ff956d87fce80cfa373065d0cb328a5aaed27900 Mon Sep 17 00:00:00 2001
From: isaacs <i@izs.me>
Date: Sat, 9 May 2015 21:12:37 -0700
Subject: [PATCH] Handle lower-case 'env.Path' on Windows

---
 which.js | 30 ++++++++++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/which.js b/which.js
index 2a1ac92..889940f 100644
--- a/which.js
+++ b/which.js
@@ -27,9 +27,22 @@ function which (cmd, opt, cb) {
   }
 
   var colon = opt.colon || COLON
-  var pathEnv = (opt.path || process.env.PATH || '').split(colon)
+  var pathEnv = opt.path || process.env.PATH || ''
   var pathExt = ['']
 
+  // On windows, env.Path is common.
+  if (process.platform === 'win32' && !pathEnv) {
+    var k = Object.keys(process.env)
+    for (var p = 0; p < k.length; p++) {
+      if (p.toLowerCase() === 'path') {
+        pathEnv = process.env[p]
+        break
+      }
+    }
+  }
+
+  pathEnv = pathEnv.split(colon)
+
   if (process.platform === 'win32') {
     pathEnv.push(process.cwd())
     pathExt = opt.pathExt || (process.env.PATHEXT || '.EXE').split(colon)
@@ -66,9 +79,22 @@ function whichSync (cmd, opt) {
 
   var colon = opt.colon || COLON
 
-  var pathEnv = (opt.path || process.env.PATH || '').split(colon)
+  var pathEnv = opt.path || process.env.PATH || ''
   var pathExt = ['']
 
+  // On windows, env.Path is common.
+  if (process.platform === 'win32' && !pathEnv) {
+    var k = Object.keys(process.env)
+    for (var p = 0; p < k.length; p++) {
+      if (p.toLowerCase() === 'path') {
+        pathEnv = process.env[p]
+        break
+      }
+    }
+  }
+
+  pathEnv = pathEnv.split(colon)
+
   if (process.platform === 'win32') {
     pathEnv.push(process.cwd())
     pathExt = (opt.pathExt || process.env.PATHEXT || '.EXE').split(colon)