which@1.1.1

* path can be passed in instead of using process.env.PATH
* better support for mingw and cygwin
* better docs
* tests

12 files changed, 564 insertions, 73 deletions

diff --git a/node_modules/which/README.md b/node_modules/which/README.md
index ff1eb531a..d5571528a 100644
--- a/node_modules/which/README.md
+++ b/node_modules/which/README.md
@@ -1,5 +1,34 @@
-The "which" util from npm's guts.
+# which
+
+Like the unix `which` utility.
 
 Finds the first instance of a specified executable in the PATH
 environment variable.  Does not cache the results, so `hash -r` is not
 needed when the PATH changes.
+
+## USAGE
+
+```javascript
+var which = require('which')
+
+// async usage
+which('node', function (er, resolvedPath) {
+  // er is returned if no "node" is found on the PATH
+  // if it is found, then the absolute path to the exec is returned
+})
+
+// sync usage
+// throws if not found
+var resolved = which.sync('node')
+
+// Pass options to override the PATH and PATHEXT environment vars.
+which('node', { path: someOtherPath }, function (er, resolved) {
+  if (er)
+    throw er
+  console.log('found at %j', resolved)
+})
+```
+
+## OPTIONS
+
+If you pass in options, then `path` and `pathExt` are relevant.
diff --git a/node_modules/which/node_modules/is-absolute/LICENSE b/node_modules/which/node_modules/is-absolute/LICENSE
new file mode 100644
index 000000000..904ab073b
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014-2015, Jon Schlinkert.Copyright (c) 2009-2015, TJ Holowaychuk.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/node_modules/which/node_modules/is-absolute/README.md b/node_modules/which/node_modules/is-absolute/README.md
new file mode 100644
index 000000000..768f4b833
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/README.md
@@ -0,0 +1,53 @@
+# is-absolute [![NPM version](https://badge.fury.io/js/is-absolute.svg)](http://badge.fury.io/js/is-absolute)  [![Build Status](https://travis-ci.org/jonschlinkert/is-absolute.svg)](https://travis-ci.org/jonschlinkert/is-absolute) 
+
+> Return true if a file path is absolute.
+
+Based on the `isAbsolute` utility method in [express](https://github.com/visionmedia/express).
+
+## Install with [npm](npmjs.org)
+
+```bash
+npm i is-absolute --save
+```
+
+## Usage
+
+```js
+var isAbsolute = require('is-absolute');
+console.log(isAbsolute('a/b/c.js'));
+//=> 'false';
+```
+
+## Running tests
+Install dev dependencies.
+
+```bash
+npm i -d && npm test
+```
+
+
+## Contributing
+Pull requests and stars are always welcome. For bugs and feature requests, [please create an issue](https://github.com/jonschlinkert/is-absolute/issues)
+
+
+## Other projects
+* [is-relative](https://github.com/jonschlinkert/is-relative): Returns `true` if the path appears to be relative.
+* [is-dotfile](https://github.com/regexps/is-dotfile): Return true if a file path is (or has) a dotfile.
+* [is-glob](https://github.com/jonschlinkert/is-glob): Returns `true` if the given string looks like a glob pattern.
+* [cwd](https://github.com/jonschlinkert/cwd): Node.js util for easily getting the current working directory of a project based on package.json or the given path.
+* [git-config-path](https://github.com/jonschlinkert/git-config-path): Resolve the path to the user's global .gitconfig.
+
+## Author
+
+**Jon Schlinkert**
+ 
++ [github/jonschlinkert](https://github.com/jonschlinkert)
++ [twitter/jonschlinkert](http://twitter.com/jonschlinkert) 
+
+## License
+Copyright (c) 2014-2015 Jon Schlinkert  
+Released under the MIT license
+
+***
+
+_This file was generated by [verb-cli](https://github.com/assemble/verb-cli) on March 05, 2015._
diff --git a/node_modules/which/node_modules/is-absolute/index.js b/node_modules/which/node_modules/is-absolute/index.js
new file mode 100644
index 000000000..e7a40dd73
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/index.js
@@ -0,0 +1,27 @@
+/*!
+ * is-absolute <https://github.com/jonschlinkert/is-absolute>
+ *
+ * Copyright (c) 2014-2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+var isRelative = require('is-relative');
+
+module.exports = function isAbsolute(filepath) {
+  if ('/' === filepath[0]) {
+    return true;
+  }
+  if (':' === filepath[1] && '\\' === filepath[2]) {
+    return true;
+  }
+  // Microsoft Azure absolute filepath
+  if ('\\\\' == filepath.substring(0, 2)) {
+    return true;
+  }
+  if (!isRelative(filepath)) {
+    return true;
+  }
+};
+
diff --git a/node_modules/which/node_modules/is-absolute/node_modules/is-relative/LICENSE-MIT b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/LICENSE-MIT
new file mode 100644
index 000000000..b576e8d48
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/LICENSE-MIT
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2014 Jon Schlinkert
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/node_modules/which/node_modules/is-absolute/node_modules/is-relative/README.md b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/README.md
new file mode 100644
index 000000000..760be8d06
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/README.md
@@ -0,0 +1,38 @@
+# is-relative [![NPM version](https://badge.fury.io/js/is-relative.svg)](http://badge.fury.io/js/is-relative)
+
+> Returns `true` if the path appears to be relative.
+
+## Install
+### Install with [npm](npmjs.org)
+
+```bash
+npm i is-relative --save
+```
+
+## Usage
+### [isRelative](index.js#L16)
+
+* `filepath` **{String}**: Path to test.    
+* `returns`: {Boolean}  
+
+```js
+var isRelative = require('is-relative');
+isRelative('README.md');
+//=> true
+```
+
+
+## Author
+
+**Jon Schlinkert**
+ 
++ [github/jonschlinkert](https://github.com/jonschlinkert)
++ [twitter/jonschlinkert](http://twitter.com/jonschlinkert) 
+
+## License
+Copyright (c) 2014 Jon Schlinkert  
+Released under the MIT license
+
+***
+
+_This file was generated by [verb](https://github.com/assemble/verb) on November 17, 2014._
\ No newline at end of file
diff --git a/node_modules/which/node_modules/is-absolute/node_modules/is-relative/index.js b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/index.js
new file mode 100644
index 000000000..ffc760a82
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/index.js
@@ -0,0 +1,21 @@
+'use strict';
+
+/**
+ * ```js
+ * var isRelative = require('is-relative');
+ * isRelative('README.md');
+ * //=> true
+ * ```
+ *
+ * @name isRelative
+ * @param {String} `filepath` Path to test.
+ * @return {Boolean}
+ * @api public
+ */
+
+module.exports = function isRelative(filepath) {
+  if (typeof filepath !== 'string') {
+    throw new Error('isRelative expects a string.');
+  }
+  return !/^([a-z]+:)?[\\\/]/i.test(filepath);
+};
\ No newline at end of file
diff --git a/node_modules/which/node_modules/is-absolute/node_modules/is-relative/package.json b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/package.json
new file mode 100644
index 000000000..d582081dd
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/node_modules/is-relative/package.json
@@ -0,0 +1,76 @@
+{
+  "name": "is-relative",
+  "description": "Returns `true` if the path appears to be relative.",
+  "version": "0.1.3",
+  "homepage": "https://github.com/jonschlinkert/is-relative",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/is-relative.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/is-relative/issues"
+  },
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "https://github.com/jonschlinkert/is-relative/blob/master/LICENSE-MIT"
+    }
+  ],
+  "keywords": [
+    "absolute",
+    "check",
+    "file",
+    "filepath",
+    "is",
+    "normalize",
+    "path",
+    "path.relative",
+    "relative",
+    "resolve",
+    "slash",
+    "slashes",
+    "uri",
+    "url"
+  ],
+  "main": "index.js",
+  "files": [
+    "index.js",
+    "LICENSE-MIT"
+  ],
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha -R spec"
+  },
+  "devDependencies": {
+    "mocha": "*",
+    "verb": ">= 0.2.6",
+    "verb-tag-jscomments": "^0.1.4"
+  },
+  "_id": "is-relative@0.1.3",
+  "_shasum": "905fee8ae86f45b3ec614bc3c15c869df0876e82",
+  "_from": "is-relative@>=0.1.0 <0.2.0",
+  "_npmVersion": "1.4.9",
+  "_npmUser": {
+    "name": "jonschlinkert",
+    "email": "github@sellside.com"
+  },
+  "maintainers": [
+    {
+      "name": "jonschlinkert",
+      "email": "github@sellside.com"
+    }
+  ],
+  "dist": {
+    "shasum": "905fee8ae86f45b3ec614bc3c15c869df0876e82",
+    "tarball": "http://registry.npmjs.org/is-relative/-/is-relative-0.1.3.tgz"
+  },
+  "directories": {},
+  "_resolved": "https://registry.npmjs.org/is-relative/-/is-relative-0.1.3.tgz",
+  "readme": "ERROR: No README data found!"
+}
diff --git a/node_modules/which/node_modules/is-absolute/package.json b/node_modules/which/node_modules/is-absolute/package.json
new file mode 100644
index 000000000..4f954b855
--- /dev/null
+++ b/node_modules/which/node_modules/is-absolute/package.json
@@ -0,0 +1,76 @@
+{
+  "name": "is-absolute",
+  "description": "Return true if a file path is absolute.",
+  "version": "0.1.7",
+  "homepage": "https://github.com/jonschlinkert/is-absolute",
+  "author": {
+    "name": "Jon Schlinkert",
+    "url": "https://github.com/jonschlinkert"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/jonschlinkert/is-absolute.git"
+  },
+  "bugs": {
+    "url": "https://github.com/jonschlinkert/is-absolute/issues"
+  },
+  "license": {
+    "type": "MIT",
+    "url": "https://github.com/jonschlinkert/is-absolute/blob/master/LICENSE"
+  },
+  "files": [
+    "index.js"
+  ],
+  "main": "index.js",
+  "engines": {
+    "node": ">=0.10.0"
+  },
+  "scripts": {
+    "test": "mocha"
+  },
+  "dependencies": {
+    "is-relative": "^0.1.0"
+  },
+  "devDependencies": {
+    "mocha": "*"
+  },
+  "keywords": [
+    "absolute",
+    "check",
+    "file",
+    "filepath",
+    "is",
+    "normalize",
+    "path",
+    "path.relative",
+    "relative",
+    "resolve",
+    "slash",
+    "slashes",
+    "uri",
+    "url"
+  ],
+  "gitHead": "90cca7b671620bf28b778a61fddc8a986a2e1095",
+  "_id": "is-absolute@0.1.7",
+  "_shasum": "847491119fccb5fb436217cc737f7faad50f603f",
+  "_from": "is-absolute@>=0.1.7 <0.2.0",
+  "_npmVersion": "2.5.1",
+  "_nodeVersion": "0.12.0",
+  "_npmUser": {
+    "name": "jonschlinkert",
+    "email": "github@sellside.com"
+  },
+  "maintainers": [
+    {
+      "name": "jonschlinkert",
+      "email": "github@sellside.com"
+    }
+  ],
+  "dist": {
+    "shasum": "847491119fccb5fb436217cc737f7faad50f603f",
+    "tarball": "http://registry.npmjs.org/is-absolute/-/is-absolute-0.1.7.tgz"
+  },
+  "directories": {},
+  "_resolved": "https://registry.npmjs.org/is-absolute/-/is-absolute-0.1.7.tgz",
+  "readme": "ERROR: No README data found!"
+}
diff --git a/node_modules/which/package.json b/node_modules/which/package.json
index d2b7b166f..8cffb7986 100644
--- a/node_modules/which/package.json
+++ b/node_modules/which/package.json
@@ -6,7 +6,7 @@
   },
   "name": "which",
   "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
-  "version": "1.0.9",
+  "version": "1.1.1",
   "repository": {
     "type": "git",
     "url": "git://github.com/isaacs/node-which.git"
@@ -16,20 +16,34 @@
     "which": "./bin/which"
   },
   "license": "ISC",
-  "gitHead": "df3d52a0ecd5f366d550e0f14d67ca4d5e621bad",
+  "dependencies": {
+    "is-absolute": "^0.1.7"
+  },
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.3.3",
+    "tap": "^1.0.2"
+  },
+  "scripts": {
+    "test": "tap test/*.js"
+  },
+  "gitHead": "c80a08e9f8cf7a5c0f39c2e2f87f18f153b118a8",
   "bugs": {
     "url": "https://github.com/isaacs/node-which/issues"
   },
-  "homepage": "https://github.com/isaacs/node-which",
-  "_id": "which@1.0.9",
-  "scripts": {},
-  "_shasum": "460c1da0f810103d0321a9b633af9e575e64486f",
-  "_from": "which@>=1.0.9 <1.1.0",
-  "_npmVersion": "2.6.0",
-  "_nodeVersion": "1.1.0",
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "_id": "which@1.1.1",
+  "_shasum": "9ce512459946166e12c083f08ec073380fc8cbbb",
+  "_from": "which@>=1.1.1 <1.2.0",
+  "_npmVersion": "2.9.1",
+  "_nodeVersion": "2.0.1",
   "_npmUser": {
     "name": "isaacs",
-    "email": "i@izs.me"
+    "email": "isaacs@npmjs.com"
+  },
+  "dist": {
+    "shasum": "9ce512459946166e12c083f08ec073380fc8cbbb",
+    "tarball": "http://registry.npmjs.org/which/-/which-1.1.1.tgz"
   },
   "maintainers": [
     {
@@ -37,11 +51,6 @@
       "email": "i@izs.me"
     }
   ],
-  "dist": {
-    "shasum": "460c1da0f810103d0321a9b633af9e575e64486f",
-    "tarball": "http://registry.npmjs.org/which/-/which-1.0.9.tgz"
-  },
   "directories": {},
-  "_resolved": "https://registry.npmjs.org/which/-/which-1.0.9.tgz",
-  "readme": "ERROR: No README data found!"
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.1.1.tgz"
 }
diff --git a/node_modules/which/test/basic.js b/node_modules/which/test/basic.js
new file mode 100644
index 000000000..189ca6d0a
--- /dev/null
+++ b/node_modules/which/test/basic.js
@@ -0,0 +1,84 @@
+var t = require('tap')
+var fs = require('fs')
+var rimraf = require('rimraf')
+var mkdirp = require('mkdirp')
+var fixture = __dirname + '/fixture'
+var which = require('../which.js')
+var path = require('path')
+
+var isWindows = process.platform === 'win32' ||
+    process.env.OSTYPE === 'cygwin' ||
+    process.env.OSTYPE === 'msys'
+
+var skip = { skip: isWindows ? 'not relevant on windows' : false }
+
+t.test('setup', function (t) {
+  rimraf.sync(fixture)
+  mkdirp.sync(fixture)
+  fs.writeFileSync(fixture + '/foo.sh', 'echo foo\n')
+  t.end()
+})
+
+t.test('does not find non-executable', skip, function (t) {
+  t.plan(2)
+
+  t.test('absolute', function (t) {
+    t.plan(2)
+    which(fixture + '/foo.sh', function (er) {
+      t.isa(er, Error)
+    })
+
+    t.throws(function () {
+      which.sync(fixture + '/foo.sh')
+    })
+  })
+
+  t.test('with path', function (t) {
+    t.plan(2)
+    which('foo.sh', { path: fixture }, function (er) {
+      t.isa(er, Error)
+    })
+
+    t.throws(function () {
+      which.sync('foo.sh', { path: fixture })
+    })
+  })
+})
+
+t.test('make executable', function (t) {
+  fs.chmodSync(fixture + '/foo.sh', '0755')
+  t.end()
+})
+
+t.test('find when executable', function (t) {
+  t.plan(2)
+  var opt = { pathExt: '.sh' }
+  var expect = path.resolve(fixture, 'foo.sh').toLowerCase()
+
+  t.test('absolute', function (t) {
+    t.plan(2)
+    runTest(t)
+  })
+
+  function runTest(t) {
+    which(fixture + '/foo.sh', opt, function (er, found) {
+      if (er)
+        throw er
+      t.equal(found.toLowerCase(), expect)
+    })
+
+    var found = which.sync(fixture + '/foo.sh', opt).toLowerCase()
+    t.equal(found, expect)
+  }
+
+  t.test('with path', function (t) {
+    t.plan(2)
+    opt.path = fixture
+    runTest(t)
+  })
+})
+
+t.test('clean', function (t) {
+  rimraf.sync(fixture)
+  t.end()
+})
diff --git a/node_modules/which/which.js b/node_modules/which/which.js
index 2a45417da..13fc26dcf 100644
--- a/node_modules/which/which.js
+++ b/node_modules/which/which.js
@@ -1,54 +1,83 @@
 module.exports = which
 which.sync = whichSync
 
-var path = require("path")
-  , fs
-  , COLON = process.platform === "win32" ? ";" : ":"
-  , isExe
-  , fs = require("fs")
+var isWindows = process.platform === 'win32' ||
+    process.env.OSTYPE === 'cygwin' ||
+    process.env.OSTYPE === 'msys'
 
-if (process.platform == "win32") {
+var path = require('path')
+var COLON = isWindows ? ';' : ':'
+var isExe
+var fs = require('fs')
+var isAbsolute = require('is-absolute')
+
+if (isWindows) {
   // On windows, there is no good way to check that a file is executable
   isExe = function isExe () { return true }
 } else {
   isExe = function isExe (mod, uid, gid) {
-    //console.error(mod, uid, gid);
-    //console.error("isExe?", (mod & 0111).toString(8))
     var ret = (mod & 0001)
         || (mod & 0010) && process.getgid && gid === process.getgid()
-        || (mod & 0010) && process.getuid && 0   === process.getuid()
         || (mod & 0100) && process.getuid && uid === process.getuid()
-        || (mod & 0100) && process.getuid && 0   === process.getuid()
-    //console.error("isExe?", ret)
+        || (mod & 0110) && process.getuid && 0   === process.getuid()
+
+    if (process.getgroups && (mod & 0010)) {
+      var groups = process.getgroups()
+      for (var g = 0; g < groups.length; g++) {
+        if (groups[g] === gid)
+          return true
+      }
+    }
+
     return ret
   }
 }
 
+function which (cmd, opt, cb) {
+  if (typeof opt === 'function') {
+    cb = opt
+    opt = {}
+  }
 
+  var colon = opt.colon || COLON
+  var pathEnv = opt.path || process.env.PATH || ''
+  var pathExt = ['']
 
-function which (cmd, cb) {
-  if (isAbsolute(cmd)) return cb(null, cmd)
-  var pathEnv = (process.env.PATH || "").split(COLON)
-    , pathExt = [""]
-  if (process.platform === "win32") {
-    pathEnv.push(process.cwd())
-    pathExt = (process.env.PATHEXT || ".EXE").split(COLON)
-    if (cmd.indexOf(".") !== -1) pathExt.unshift("")
+  // On windows, env.Path is common.
+  if (isWindows && !pathEnv) {
+    var k = Object.keys(process.env)
+    for (var p = 0; p < k.length; p++) {
+      if (p.toLowerCase() === 'path') {
+        pathEnv = process.env[p]
+        break
+      }
+    }
   }
-  //console.error("pathEnv", pathEnv)
+
+  pathEnv = pathEnv.split(colon)
+
+  if (isWindows) {
+    pathEnv.unshift(process.cwd())
+    pathExt = (opt.pathExt || process.env.PATHEXT || '.EXE').split(colon)
+    if (cmd.indexOf('.') !== -1 && pathExt[0] !== '')
+      pathExt.unshift('')
+  }
+
+  // If it's absolute, then we don't bother searching the pathenv.
+  // just check the file itself, and that's it.
+  if (isAbsolute(cmd))
+    pathEnv = ['']
+
   ;(function F (i, l) {
-    if (i === l) return cb(new Error("not found: "+cmd))
+    if (i === l) return cb(new Error('not found: '+cmd))
     var p = path.resolve(pathEnv[i], cmd)
     ;(function E (ii, ll) {
       if (ii === ll) return F(i + 1, l)
       var ext = pathExt[ii]
-      //console.error(p + ext)
       fs.stat(p + ext, function (er, stat) {
         if (!er &&
-            stat &&
             stat.isFile() &&
             isExe(stat.mode, stat.uid, stat.gid)) {
-          //console.error("yes, exe!", p + ext)
           return cb(null, p + ext)
         }
         return E(ii + 1, ll)
@@ -57,45 +86,52 @@ function which (cmd, cb) {
   })(0, pathEnv.length)
 }
 
-function whichSync (cmd) {
-  if (isAbsolute(cmd)) return cmd
-  var pathEnv = (process.env.PATH || "").split(COLON)
-    , pathExt = [""]
-  if (process.platform === "win32") {
-    pathEnv.push(process.cwd())
-    pathExt = (process.env.PATHEXT || ".EXE").split(COLON)
-    if (cmd.indexOf(".") !== -1) pathExt.unshift("")
+function whichSync (cmd, opt) {
+  if (!opt)
+    opt = {}
+
+  var colon = opt.colon || COLON
+
+  var pathEnv = opt.path || process.env.PATH || ''
+  var pathExt = ['']
+
+  // On windows, env.Path is common.
+  if (isWindows && !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 (isWindows) {
+    pathEnv.unshift(process.cwd())
+    pathExt = (opt.pathExt || process.env.PATHEXT || '.EXE').split(colon)
+    if (cmd.indexOf('.') !== -1 && pathExt[0] !== '')
+      pathExt.unshift('')
   }
+
+  // If it's absolute, then we don't bother searching the pathenv.
+  // just check the file itself, and that's it.
+  if (isAbsolute(cmd))
+    pathEnv = ['']
+
   for (var i = 0, l = pathEnv.length; i < l; i ++) {
     var p = path.join(pathEnv[i], cmd)
     for (var j = 0, ll = pathExt.length; j < ll; j ++) {
       var cur = p + pathExt[j]
       var stat
-      try { stat = fs.statSync(cur) } catch (ex) {}
-      if (stat &&
-          stat.isFile() &&
-          isExe(stat.mode, stat.uid, stat.gid)) return cur
+      try {
+        stat = fs.statSync(cur)
+        if (stat.isFile() && isExe(stat.mode, stat.uid, stat.gid))
+          return cur
+      } catch (ex) {}
     }
   }
-  throw new Error("not found: "+cmd)
-}
-
-var isAbsolute = process.platform === "win32" ? absWin : absUnix
-
-function absWin (p) {
-  if (absUnix(p)) return true
-  // pull off the device/UNC bit from a windows path.
-  // from node's lib/path.js
-  var splitDeviceRe =
-        /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/][^\\\/]+)?([\\\/])?/
-    , result = splitDeviceRe.exec(p)
-    , device = result[1] || ''
-    , isUnc = device && device.charAt(1) !== ':'
-    , isAbsolute = !!result[2] || isUnc // UNC paths are always absolute
-
-  return isAbsolute
-}
 
-function absUnix (p) {
-  return p.charAt(0) === "/" || p === ""
+  throw new Error('not found: '+cmd)
 }