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1 files changed, 135 insertions, 0 deletions

diff --git a/node_modules/which/which.js b/node_modules/which/which.js
new file mode 100644
index 00000000..4347f91a
--- /dev/null
+++ b/node_modules/which/which.js
@@ -0,0 +1,135 @@
+module.exports = which
+which.sync = whichSync
+
+var isWindows = process.platform === 'win32' ||
+    process.env.OSTYPE === 'cygwin' ||
+    process.env.OSTYPE === 'msys'
+
+var path = require('path')
+var COLON = isWindows ? ';' : ':'
+var isexe = require('isexe')
+
+function getNotFoundError (cmd) {
+  var er = new Error('not found: ' + cmd)
+  er.code = 'ENOENT'
+
+  return er
+}
+
+function getPathInfo (cmd, opt) {
+  var colon = opt.colon || COLON
+  var pathEnv = opt.path || process.env.PATH || ''
+  var pathExt = ['']
+
+  pathEnv = pathEnv.split(colon)
+
+  var pathExtExe = ''
+  if (isWindows) {
+    pathEnv.unshift(process.cwd())
+    pathExtExe = (opt.pathExt || process.env.PATHEXT || '.EXE;.CMD;.BAT;.COM')
+    pathExt = pathExtExe.split(colon)
+
+
+    // Always test the cmd itself first.  isexe will check to make sure
+    // it's found in the pathExt set.
+    if (cmd.indexOf('.') !== -1 && pathExt[0] !== '')
+      pathExt.unshift('')
+  }
+
+  // If it has a slash, then we don't bother searching the pathenv.
+  // just check the file itself, and that's it.
+  if (cmd.match(/\//) || isWindows && cmd.match(/\\/))
+    pathEnv = ['']
+
+  return {
+    env: pathEnv,
+    ext: pathExt,
+    extExe: pathExtExe
+  }
+}
+
+function which (cmd, opt, cb) {
+  if (typeof opt === 'function') {
+    cb = opt
+    opt = {}
+  }
+
+  var info = getPathInfo(cmd, opt)
+  var pathEnv = info.env
+  var pathExt = info.ext
+  var pathExtExe = info.extExe
+  var found = []
+
+  ;(function F (i, l) {
+    if (i === l) {
+      if (opt.all && found.length)
+        return cb(null, found)
+      else
+        return cb(getNotFoundError(cmd))
+    }
+
+    var pathPart = pathEnv[i]
+    if (pathPart.charAt(0) === '"' && pathPart.slice(-1) === '"')
+      pathPart = pathPart.slice(1, -1)
+
+    var p = path.join(pathPart, cmd)
+    if (!pathPart && (/^\.[\\\/]/).test(cmd)) {
+      p = cmd.slice(0, 2) + p
+    }
+    ;(function E (ii, ll) {
+      if (ii === ll) return F(i + 1, l)
+      var ext = pathExt[ii]
+      isexe(p + ext, { pathExt: pathExtExe }, function (er, is) {
+        if (!er && is) {
+          if (opt.all)
+            found.push(p + ext)
+          else
+            return cb(null, p + ext)
+        }
+        return E(ii + 1, ll)
+      })
+    })(0, pathExt.length)
+  })(0, pathEnv.length)
+}
+
+function whichSync (cmd, opt) {
+  opt = opt || {}
+
+  var info = getPathInfo(cmd, opt)
+  var pathEnv = info.env
+  var pathExt = info.ext
+  var pathExtExe = info.extExe
+  var found = []
+
+  for (var i = 0, l = pathEnv.length; i < l; i ++) {
+    var pathPart = pathEnv[i]
+    if (pathPart.charAt(0) === '"' && pathPart.slice(-1) === '"')
+      pathPart = pathPart.slice(1, -1)
+
+    var p = path.join(pathPart, cmd)
+    if (!pathPart && /^\.[\\\/]/.test(cmd)) {
+      p = cmd.slice(0, 2) + p
+    }
+    for (var j = 0, ll = pathExt.length; j < ll; j ++) {
+      var cur = p + pathExt[j]
+      var is
+      try {
+        is = isexe.sync(cur, { pathExt: pathExtExe })
+        if (is) {
+          if (opt.all)
+            found.push(cur)
+          else
+            return cur
+        }
+      } catch (ex) {}
+    }
+  }
+
+  if (opt.all && found.length)
+    return found
+
+  if (opt.nothrow)
+    return null
+
+  throw getNotFoundError(cmd)
+}