which@2.0.2

47 files changed, 2951 insertions, 113 deletions

diff --git a/node_modules/cross-spawn/node_modules/.bin/which b/node_modules/cross-spawn/node_modules/.bin/which
new file mode 120000
index 000000000..f62471c85
--- /dev/null
+++ b/node_modules/cross-spawn/node_modules/.bin/which
@@ -0,0 +1 @@
+../which/bin/which
\ No newline at end of file
diff --git a/node_modules/cross-spawn/node_modules/which/CHANGELOG.md b/node_modules/cross-spawn/node_modules/which/CHANGELOG.md
new file mode 100644
index 000000000..3d83d2694
--- /dev/null
+++ b/node_modules/cross-spawn/node_modules/which/CHANGELOG.md
@@ -0,0 +1,152 @@
+# Changes
+
+
+## 1.3.1
+
+* update deps
+* update travis
+
+## v1.3.0
+
+* Add nothrow option to which.sync
+* update tap
+
+## v1.2.14
+
+* appveyor: drop node 5 and 0.x
+* travis-ci: add node 6, drop 0.x
+
+## v1.2.13
+
+* test: Pass missing option to pass on windows
+* update tap
+* update isexe to 2.0.0
+* neveragain.tech pledge request
+
+## v1.2.12
+
+* Removed unused require
+
+## v1.2.11
+
+* Prevent changelog script from being included in package
+
+## v1.2.10
+
+* Use env.PATH only, not env.Path
+
+## v1.2.9
+
+* fix for paths starting with ../
+* Remove unused `is-absolute` module
+
+## v1.2.8
+
+* bullet items in changelog that contain (but don't start with) #
+
+## v1.2.7
+
+* strip 'update changelog' changelog entries out of changelog
+
+## v1.2.6
+
+* make the changelog bulleted
+
+## v1.2.5
+
+* make a changelog, and keep it up to date
+* don't include tests in package
+* Properly handle relative-path executables
+* appveyor
+* Attach error code to Not Found error
+* Make tests pass on Windows
+
+## v1.2.4
+
+* Fix typo
+
+## v1.2.3
+
+* update isexe, fix regression in pathExt handling
+
+## v1.2.2
+
+* update deps, use isexe module, test windows
+
+## v1.2.1
+
+* Sometimes windows PATH entries are quoted
+* Fixed a bug in the check for group and user mode bits. This bug was introduced during refactoring for supporting strict mode.
+* doc cli
+
+## v1.2.0
+
+* Add support for opt.all and -as cli flags
+* test the bin
+* update travis
+* Allow checking for multiple programs in bin/which
+* tap 2
+
+## v1.1.2
+
+* travis
+* Refactored and fixed undefined error on Windows
+* Support strict mode
+
+## v1.1.1
+
+* test +g exes against secondary groups, if available
+* Use windows exe semantics on cygwin & msys
+* cwd should be first in path on win32, not last
+* Handle lower-case 'env.Path' on Windows
+* Update docs
+* use single-quotes
+
+## v1.1.0
+
+* Add tests, depend on is-absolute
+
+## v1.0.9
+
+* which.js: root is allowed to execute files owned by anyone
+
+## v1.0.8
+
+* don't use graceful-fs
+
+## v1.0.7
+
+* add license to package.json
+
+## v1.0.6
+
+* isc license
+
+## 1.0.5
+
+* Awful typo
+
+## 1.0.4
+
+* Test for path absoluteness properly
+* win: Allow '' as a pathext if cmd has a . in it
+
+## 1.0.3
+
+* Remove references to execPath
+* Make `which.sync()` work on Windows by honoring the PATHEXT variable.
+* Make `isExe()` always return true on Windows.
+* MIT
+
+## 1.0.2
+
+* Only files can be exes
+
+## 1.0.1
+
+* Respect the PATHEXT env for win32 support
+* should 0755 the bin
+* binary
+* guts
+* package
+* 1st
diff --git a/node_modules/cross-spawn/node_modules/which/LICENSE b/node_modules/cross-spawn/node_modules/which/LICENSE
new file mode 100644
index 000000000..19129e315
--- /dev/null
+++ b/node_modules/cross-spawn/node_modules/which/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/cross-spawn/node_modules/which/README.md b/node_modules/cross-spawn/node_modules/which/README.md
new file mode 100644
index 000000000..8c0b0cbf7
--- /dev/null
+++ b/node_modules/cross-spawn/node_modules/which/README.md
@@ -0,0 +1,51 @@
+# 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')
+
+// if nothrow option is used, returns null if not found
+resolved = which.sync('node', {nothrow: true})
+
+// 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)
+})
+```
+
+## CLI USAGE
+
+Same as the BSD `which(1)` binary.
+
+```
+usage: which [-as] program ...
+```
+
+## OPTIONS
+
+You may pass an options object as the second argument.
+
+- `path`: Use instead of the `PATH` environment variable.
+- `pathExt`: Use instead of the `PATHEXT` environment variable.
+- `all`: Return all matches, instead of just the first one.  Note that
+  this means the function returns an array of strings instead of a
+  single string.
diff --git a/node_modules/which/bin/which b/node_modules/cross-spawn/node_modules/which/bin/which
index 7cee3729e..7cee3729e 100755
--- a/node_modules/which/bin/which
+++ b/node_modules/cross-spawn/node_modules/which/bin/which
diff --git a/node_modules/cross-spawn/node_modules/which/package.json b/node_modules/cross-spawn/node_modules/which/package.json
new file mode 100644
index 000000000..6a22cf78c
--- /dev/null
+++ b/node_modules/cross-spawn/node_modules/which/package.json
@@ -0,0 +1,65 @@
+{
+  "_from": "which@^1.2.9",
+  "_id": "which@1.3.1",
+  "_inBundle": false,
+  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_location": "/cross-spawn/which",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "which@^1.2.9",
+    "name": "which",
+    "escapedName": "which",
+    "rawSpec": "^1.2.9",
+    "saveSpec": null,
+    "fetchSpec": "^1.2.9"
+  },
+  "_requiredBy": [
+    "/cross-spawn"
+  ],
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
+  "_spec": "which@^1.2.9",
+  "_where": "/Users/claudiahdz/npm/cli/node_modules/cross-spawn",
+  "author": {
+    "name": "Isaac Z. Schlueter",
+    "email": "i@izs.me",
+    "url": "http://blog.izs.me"
+  },
+  "bin": {
+    "which": "bin/which"
+  },
+  "bugs": {
+    "url": "https://github.com/isaacs/node-which/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "isexe": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.1"
+  },
+  "files": [
+    "which.js",
+    "bin/which"
+  ],
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "license": "ISC",
+  "main": "which.js",
+  "name": "which",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-which.git"
+  },
+  "scripts": {
+    "changelog": "bash gen-changelog.sh",
+    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
+    "test": "tap test/*.js --cov"
+  },
+  "version": "1.3.1"
+}
diff --git a/node_modules/cross-spawn/node_modules/which/which.js b/node_modules/cross-spawn/node_modules/which/which.js
new file mode 100644
index 000000000..4347f91a1
--- /dev/null
+++ b/node_modules/cross-spawn/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)
+}
diff --git a/node_modules/libnpx/node_modules/.bin/which b/node_modules/libnpx/node_modules/.bin/which
new file mode 120000
index 000000000..f62471c85
--- /dev/null
+++ b/node_modules/libnpx/node_modules/.bin/which
@@ -0,0 +1 @@
+../which/bin/which
\ No newline at end of file
diff --git a/node_modules/libnpx/node_modules/which/CHANGELOG.md b/node_modules/libnpx/node_modules/which/CHANGELOG.md
new file mode 100644
index 000000000..3d83d2694
--- /dev/null
+++ b/node_modules/libnpx/node_modules/which/CHANGELOG.md
@@ -0,0 +1,152 @@
+# Changes
+
+
+## 1.3.1
+
+* update deps
+* update travis
+
+## v1.3.0
+
+* Add nothrow option to which.sync
+* update tap
+
+## v1.2.14
+
+* appveyor: drop node 5 and 0.x
+* travis-ci: add node 6, drop 0.x
+
+## v1.2.13
+
+* test: Pass missing option to pass on windows
+* update tap
+* update isexe to 2.0.0
+* neveragain.tech pledge request
+
+## v1.2.12
+
+* Removed unused require
+
+## v1.2.11
+
+* Prevent changelog script from being included in package
+
+## v1.2.10
+
+* Use env.PATH only, not env.Path
+
+## v1.2.9
+
+* fix for paths starting with ../
+* Remove unused `is-absolute` module
+
+## v1.2.8
+
+* bullet items in changelog that contain (but don't start with) #
+
+## v1.2.7
+
+* strip 'update changelog' changelog entries out of changelog
+
+## v1.2.6
+
+* make the changelog bulleted
+
+## v1.2.5
+
+* make a changelog, and keep it up to date
+* don't include tests in package
+* Properly handle relative-path executables
+* appveyor
+* Attach error code to Not Found error
+* Make tests pass on Windows
+
+## v1.2.4
+
+* Fix typo
+
+## v1.2.3
+
+* update isexe, fix regression in pathExt handling
+
+## v1.2.2
+
+* update deps, use isexe module, test windows
+
+## v1.2.1
+
+* Sometimes windows PATH entries are quoted
+* Fixed a bug in the check for group and user mode bits. This bug was introduced during refactoring for supporting strict mode.
+* doc cli
+
+## v1.2.0
+
+* Add support for opt.all and -as cli flags
+* test the bin
+* update travis
+* Allow checking for multiple programs in bin/which
+* tap 2
+
+## v1.1.2
+
+* travis
+* Refactored and fixed undefined error on Windows
+* Support strict mode
+
+## v1.1.1
+
+* test +g exes against secondary groups, if available
+* Use windows exe semantics on cygwin & msys
+* cwd should be first in path on win32, not last
+* Handle lower-case 'env.Path' on Windows
+* Update docs
+* use single-quotes
+
+## v1.1.0
+
+* Add tests, depend on is-absolute
+
+## v1.0.9
+
+* which.js: root is allowed to execute files owned by anyone
+
+## v1.0.8
+
+* don't use graceful-fs
+
+## v1.0.7
+
+* add license to package.json
+
+## v1.0.6
+
+* isc license
+
+## 1.0.5
+
+* Awful typo
+
+## 1.0.4
+
+* Test for path absoluteness properly
+* win: Allow '' as a pathext if cmd has a . in it
+
+## 1.0.3
+
+* Remove references to execPath
+* Make `which.sync()` work on Windows by honoring the PATHEXT variable.
+* Make `isExe()` always return true on Windows.
+* MIT
+
+## 1.0.2
+
+* Only files can be exes
+
+## 1.0.1
+
+* Respect the PATHEXT env for win32 support
+* should 0755 the bin
+* binary
+* guts
+* package
+* 1st
diff --git a/node_modules/libnpx/node_modules/which/LICENSE b/node_modules/libnpx/node_modules/which/LICENSE
new file mode 100644
index 000000000..19129e315
--- /dev/null
+++ b/node_modules/libnpx/node_modules/which/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/libnpx/node_modules/which/README.md b/node_modules/libnpx/node_modules/which/README.md
new file mode 100644
index 000000000..8c0b0cbf7
--- /dev/null
+++ b/node_modules/libnpx/node_modules/which/README.md
@@ -0,0 +1,51 @@
+# 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')
+
+// if nothrow option is used, returns null if not found
+resolved = which.sync('node', {nothrow: true})
+
+// 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)
+})
+```
+
+## CLI USAGE
+
+Same as the BSD `which(1)` binary.
+
+```
+usage: which [-as] program ...
+```
+
+## OPTIONS
+
+You may pass an options object as the second argument.
+
+- `path`: Use instead of the `PATH` environment variable.
+- `pathExt`: Use instead of the `PATHEXT` environment variable.
+- `all`: Return all matches, instead of just the first one.  Note that
+  this means the function returns an array of strings instead of a
+  single string.
diff --git a/node_modules/libnpx/node_modules/which/bin/which b/node_modules/libnpx/node_modules/which/bin/which
new file mode 100755
index 000000000..7cee3729e
--- /dev/null
+++ b/node_modules/libnpx/node_modules/which/bin/which
@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+var which = require("../")
+if (process.argv.length < 3)
+  usage()
+
+function usage () {
+  console.error('usage: which [-as] program ...')
+  process.exit(1)
+}
+
+var all = false
+var silent = false
+var dashdash = false
+var args = process.argv.slice(2).filter(function (arg) {
+  if (dashdash || !/^-/.test(arg))
+    return true
+
+  if (arg === '--') {
+    dashdash = true
+    return false
+  }
+
+  var flags = arg.substr(1).split('')
+  for (var f = 0; f < flags.length; f++) {
+    var flag = flags[f]
+    switch (flag) {
+      case 's':
+        silent = true
+        break
+      case 'a':
+        all = true
+        break
+      default:
+        console.error('which: illegal option -- ' + flag)
+        usage()
+    }
+  }
+  return false
+})
+
+process.exit(args.reduce(function (pv, current) {
+  try {
+    var f = which.sync(current, { all: all })
+    if (all)
+      f = f.join('\n')
+    if (!silent)
+      console.log(f)
+    return pv;
+  } catch (e) {
+    return 1;
+  }
+}, 0))
diff --git a/node_modules/libnpx/node_modules/which/package.json b/node_modules/libnpx/node_modules/which/package.json
new file mode 100644
index 000000000..39add93f8
--- /dev/null
+++ b/node_modules/libnpx/node_modules/which/package.json
@@ -0,0 +1,65 @@
+{
+  "_from": "which@^1.3.0",
+  "_id": "which@1.3.1",
+  "_inBundle": false,
+  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_location": "/libnpx/which",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "which@^1.3.0",
+    "name": "which",
+    "escapedName": "which",
+    "rawSpec": "^1.3.0",
+    "saveSpec": null,
+    "fetchSpec": "^1.3.0"
+  },
+  "_requiredBy": [
+    "/libnpx"
+  ],
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
+  "_spec": "which@^1.3.0",
+  "_where": "/Users/claudiahdz/npm/cli/node_modules/libnpx",
+  "author": {
+    "name": "Isaac Z. Schlueter",
+    "email": "i@izs.me",
+    "url": "http://blog.izs.me"
+  },
+  "bin": {
+    "which": "bin/which"
+  },
+  "bugs": {
+    "url": "https://github.com/isaacs/node-which/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "isexe": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.1"
+  },
+  "files": [
+    "which.js",
+    "bin/which"
+  ],
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "license": "ISC",
+  "main": "which.js",
+  "name": "which",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-which.git"
+  },
+  "scripts": {
+    "changelog": "bash gen-changelog.sh",
+    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
+    "test": "tap test/*.js --cov"
+  },
+  "version": "1.3.1"
+}
diff --git a/node_modules/libnpx/node_modules/which/which.js b/node_modules/libnpx/node_modules/which/which.js
new file mode 100644
index 000000000..4347f91a1
--- /dev/null
+++ b/node_modules/libnpx/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)
+}
diff --git a/node_modules/node-gyp/node_modules/.bin/which b/node_modules/node-gyp/node_modules/.bin/which
new file mode 120000
index 000000000..f62471c85
--- /dev/null
+++ b/node_modules/node-gyp/node_modules/.bin/which
@@ -0,0 +1 @@
+../which/bin/which
\ No newline at end of file
diff --git a/node_modules/node-gyp/node_modules/which/CHANGELOG.md b/node_modules/node-gyp/node_modules/which/CHANGELOG.md
new file mode 100644
index 000000000..3d83d2694
--- /dev/null
+++ b/node_modules/node-gyp/node_modules/which/CHANGELOG.md
@@ -0,0 +1,152 @@
+# Changes
+
+
+## 1.3.1
+
+* update deps
+* update travis
+
+## v1.3.0
+
+* Add nothrow option to which.sync
+* update tap
+
+## v1.2.14
+
+* appveyor: drop node 5 and 0.x
+* travis-ci: add node 6, drop 0.x
+
+## v1.2.13
+
+* test: Pass missing option to pass on windows
+* update tap
+* update isexe to 2.0.0
+* neveragain.tech pledge request
+
+## v1.2.12
+
+* Removed unused require
+
+## v1.2.11
+
+* Prevent changelog script from being included in package
+
+## v1.2.10
+
+* Use env.PATH only, not env.Path
+
+## v1.2.9
+
+* fix for paths starting with ../
+* Remove unused `is-absolute` module
+
+## v1.2.8
+
+* bullet items in changelog that contain (but don't start with) #
+
+## v1.2.7
+
+* strip 'update changelog' changelog entries out of changelog
+
+## v1.2.6
+
+* make the changelog bulleted
+
+## v1.2.5
+
+* make a changelog, and keep it up to date
+* don't include tests in package
+* Properly handle relative-path executables
+* appveyor
+* Attach error code to Not Found error
+* Make tests pass on Windows
+
+## v1.2.4
+
+* Fix typo
+
+## v1.2.3
+
+* update isexe, fix regression in pathExt handling
+
+## v1.2.2
+
+* update deps, use isexe module, test windows
+
+## v1.2.1
+
+* Sometimes windows PATH entries are quoted
+* Fixed a bug in the check for group and user mode bits. This bug was introduced during refactoring for supporting strict mode.
+* doc cli
+
+## v1.2.0
+
+* Add support for opt.all and -as cli flags
+* test the bin
+* update travis
+* Allow checking for multiple programs in bin/which
+* tap 2
+
+## v1.1.2
+
+* travis
+* Refactored and fixed undefined error on Windows
+* Support strict mode
+
+## v1.1.1
+
+* test +g exes against secondary groups, if available
+* Use windows exe semantics on cygwin & msys
+* cwd should be first in path on win32, not last
+* Handle lower-case 'env.Path' on Windows
+* Update docs
+* use single-quotes
+
+## v1.1.0
+
+* Add tests, depend on is-absolute
+
+## v1.0.9
+
+* which.js: root is allowed to execute files owned by anyone
+
+## v1.0.8
+
+* don't use graceful-fs
+
+## v1.0.7
+
+* add license to package.json
+
+## v1.0.6
+
+* isc license
+
+## 1.0.5
+
+* Awful typo
+
+## 1.0.4
+
+* Test for path absoluteness properly
+* win: Allow '' as a pathext if cmd has a . in it
+
+## 1.0.3
+
+* Remove references to execPath
+* Make `which.sync()` work on Windows by honoring the PATHEXT variable.
+* Make `isExe()` always return true on Windows.
+* MIT
+
+## 1.0.2
+
+* Only files can be exes
+
+## 1.0.1
+
+* Respect the PATHEXT env for win32 support
+* should 0755 the bin
+* binary
+* guts
+* package
+* 1st
diff --git a/node_modules/node-gyp/node_modules/which/LICENSE b/node_modules/node-gyp/node_modules/which/LICENSE
new file mode 100644
index 000000000..19129e315
--- /dev/null
+++ b/node_modules/node-gyp/node_modules/which/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/node-gyp/node_modules/which/README.md b/node_modules/node-gyp/node_modules/which/README.md
new file mode 100644
index 000000000..8c0b0cbf7
--- /dev/null
+++ b/node_modules/node-gyp/node_modules/which/README.md
@@ -0,0 +1,51 @@
+# 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')
+
+// if nothrow option is used, returns null if not found
+resolved = which.sync('node', {nothrow: true})
+
+// 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)
+})
+```
+
+## CLI USAGE
+
+Same as the BSD `which(1)` binary.
+
+```
+usage: which [-as] program ...
+```
+
+## OPTIONS
+
+You may pass an options object as the second argument.
+
+- `path`: Use instead of the `PATH` environment variable.
+- `pathExt`: Use instead of the `PATHEXT` environment variable.
+- `all`: Return all matches, instead of just the first one.  Note that
+  this means the function returns an array of strings instead of a
+  single string.
diff --git a/node_modules/node-gyp/node_modules/which/bin/which b/node_modules/node-gyp/node_modules/which/bin/which
new file mode 100755
index 000000000..7cee3729e
--- /dev/null
+++ b/node_modules/node-gyp/node_modules/which/bin/which
@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+var which = require("../")
+if (process.argv.length < 3)
+  usage()
+
+function usage () {
+  console.error('usage: which [-as] program ...')
+  process.exit(1)
+}
+
+var all = false
+var silent = false
+var dashdash = false
+var args = process.argv.slice(2).filter(function (arg) {
+  if (dashdash || !/^-/.test(arg))
+    return true
+
+  if (arg === '--') {
+    dashdash = true
+    return false
+  }
+
+  var flags = arg.substr(1).split('')
+  for (var f = 0; f < flags.length; f++) {
+    var flag = flags[f]
+    switch (flag) {
+      case 's':
+        silent = true
+        break
+      case 'a':
+        all = true
+        break
+      default:
+        console.error('which: illegal option -- ' + flag)
+        usage()
+    }
+  }
+  return false
+})
+
+process.exit(args.reduce(function (pv, current) {
+  try {
+    var f = which.sync(current, { all: all })
+    if (all)
+      f = f.join('\n')
+    if (!silent)
+      console.log(f)
+    return pv;
+  } catch (e) {
+    return 1;
+  }
+}, 0))
diff --git a/node_modules/node-gyp/node_modules/which/package.json b/node_modules/node-gyp/node_modules/which/package.json
new file mode 100644
index 000000000..06b35d7b7
--- /dev/null
+++ b/node_modules/node-gyp/node_modules/which/package.json
@@ -0,0 +1,65 @@
+{
+  "_from": "which@^1.3.1",
+  "_id": "which@1.3.1",
+  "_inBundle": false,
+  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_location": "/node-gyp/which",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "which@^1.3.1",
+    "name": "which",
+    "escapedName": "which",
+    "rawSpec": "^1.3.1",
+    "saveSpec": null,
+    "fetchSpec": "^1.3.1"
+  },
+  "_requiredBy": [
+    "/node-gyp"
+  ],
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
+  "_spec": "which@^1.3.1",
+  "_where": "/Users/claudiahdz/npm/cli/node_modules/node-gyp",
+  "author": {
+    "name": "Isaac Z. Schlueter",
+    "email": "i@izs.me",
+    "url": "http://blog.izs.me"
+  },
+  "bin": {
+    "which": "bin/which"
+  },
+  "bugs": {
+    "url": "https://github.com/isaacs/node-which/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "isexe": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.1"
+  },
+  "files": [
+    "which.js",
+    "bin/which"
+  ],
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "license": "ISC",
+  "main": "which.js",
+  "name": "which",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-which.git"
+  },
+  "scripts": {
+    "changelog": "bash gen-changelog.sh",
+    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
+    "test": "tap test/*.js --cov"
+  },
+  "version": "1.3.1"
+}
diff --git a/node_modules/node-gyp/node_modules/which/which.js b/node_modules/node-gyp/node_modules/which/which.js
new file mode 100644
index 000000000..4347f91a1
--- /dev/null
+++ b/node_modules/node-gyp/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)
+}
diff --git a/node_modules/npm-lifecycle/node_modules/.bin/which b/node_modules/npm-lifecycle/node_modules/.bin/which
new file mode 120000
index 000000000..f62471c85
--- /dev/null
+++ b/node_modules/npm-lifecycle/node_modules/.bin/which
@@ -0,0 +1 @@
+../which/bin/which
\ No newline at end of file
diff --git a/node_modules/npm-lifecycle/node_modules/which/CHANGELOG.md b/node_modules/npm-lifecycle/node_modules/which/CHANGELOG.md
new file mode 100644
index 000000000..3d83d2694
--- /dev/null
+++ b/node_modules/npm-lifecycle/node_modules/which/CHANGELOG.md
@@ -0,0 +1,152 @@
+# Changes
+
+
+## 1.3.1
+
+* update deps
+* update travis
+
+## v1.3.0
+
+* Add nothrow option to which.sync
+* update tap
+
+## v1.2.14
+
+* appveyor: drop node 5 and 0.x
+* travis-ci: add node 6, drop 0.x
+
+## v1.2.13
+
+* test: Pass missing option to pass on windows
+* update tap
+* update isexe to 2.0.0
+* neveragain.tech pledge request
+
+## v1.2.12
+
+* Removed unused require
+
+## v1.2.11
+
+* Prevent changelog script from being included in package
+
+## v1.2.10
+
+* Use env.PATH only, not env.Path
+
+## v1.2.9
+
+* fix for paths starting with ../
+* Remove unused `is-absolute` module
+
+## v1.2.8
+
+* bullet items in changelog that contain (but don't start with) #
+
+## v1.2.7
+
+* strip 'update changelog' changelog entries out of changelog
+
+## v1.2.6
+
+* make the changelog bulleted
+
+## v1.2.5
+
+* make a changelog, and keep it up to date
+* don't include tests in package
+* Properly handle relative-path executables
+* appveyor
+* Attach error code to Not Found error
+* Make tests pass on Windows
+
+## v1.2.4
+
+* Fix typo
+
+## v1.2.3
+
+* update isexe, fix regression in pathExt handling
+
+## v1.2.2
+
+* update deps, use isexe module, test windows
+
+## v1.2.1
+
+* Sometimes windows PATH entries are quoted
+* Fixed a bug in the check for group and user mode bits. This bug was introduced during refactoring for supporting strict mode.
+* doc cli
+
+## v1.2.0
+
+* Add support for opt.all and -as cli flags
+* test the bin
+* update travis
+* Allow checking for multiple programs in bin/which
+* tap 2
+
+## v1.1.2
+
+* travis
+* Refactored and fixed undefined error on Windows
+* Support strict mode
+
+## v1.1.1
+
+* test +g exes against secondary groups, if available
+* Use windows exe semantics on cygwin & msys
+* cwd should be first in path on win32, not last
+* Handle lower-case 'env.Path' on Windows
+* Update docs
+* use single-quotes
+
+## v1.1.0
+
+* Add tests, depend on is-absolute
+
+## v1.0.9
+
+* which.js: root is allowed to execute files owned by anyone
+
+## v1.0.8
+
+* don't use graceful-fs
+
+## v1.0.7
+
+* add license to package.json
+
+## v1.0.6
+
+* isc license
+
+## 1.0.5
+
+* Awful typo
+
+## 1.0.4
+
+* Test for path absoluteness properly
+* win: Allow '' as a pathext if cmd has a . in it
+
+## 1.0.3
+
+* Remove references to execPath
+* Make `which.sync()` work on Windows by honoring the PATHEXT variable.
+* Make `isExe()` always return true on Windows.
+* MIT
+
+## 1.0.2
+
+* Only files can be exes
+
+## 1.0.1
+
+* Respect the PATHEXT env for win32 support
+* should 0755 the bin
+* binary
+* guts
+* package
+* 1st
diff --git a/node_modules/npm-lifecycle/node_modules/which/LICENSE b/node_modules/npm-lifecycle/node_modules/which/LICENSE
new file mode 100644
index 000000000..19129e315
--- /dev/null
+++ b/node_modules/npm-lifecycle/node_modules/which/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/npm-lifecycle/node_modules/which/README.md b/node_modules/npm-lifecycle/node_modules/which/README.md
new file mode 100644
index 000000000..8c0b0cbf7
--- /dev/null
+++ b/node_modules/npm-lifecycle/node_modules/which/README.md
@@ -0,0 +1,51 @@
+# 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')
+
+// if nothrow option is used, returns null if not found
+resolved = which.sync('node', {nothrow: true})
+
+// 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)
+})
+```
+
+## CLI USAGE
+
+Same as the BSD `which(1)` binary.
+
+```
+usage: which [-as] program ...
+```
+
+## OPTIONS
+
+You may pass an options object as the second argument.
+
+- `path`: Use instead of the `PATH` environment variable.
+- `pathExt`: Use instead of the `PATHEXT` environment variable.
+- `all`: Return all matches, instead of just the first one.  Note that
+  this means the function returns an array of strings instead of a
+  single string.
diff --git a/node_modules/npm-lifecycle/node_modules/which/bin/which b/node_modules/npm-lifecycle/node_modules/which/bin/which
new file mode 100755
index 000000000..7cee3729e
--- /dev/null
+++ b/node_modules/npm-lifecycle/node_modules/which/bin/which
@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+var which = require("../")
+if (process.argv.length < 3)
+  usage()
+
+function usage () {
+  console.error('usage: which [-as] program ...')
+  process.exit(1)
+}
+
+var all = false
+var silent = false
+var dashdash = false
+var args = process.argv.slice(2).filter(function (arg) {
+  if (dashdash || !/^-/.test(arg))
+    return true
+
+  if (arg === '--') {
+    dashdash = true
+    return false
+  }
+
+  var flags = arg.substr(1).split('')
+  for (var f = 0; f < flags.length; f++) {
+    var flag = flags[f]
+    switch (flag) {
+      case 's':
+        silent = true
+        break
+      case 'a':
+        all = true
+        break
+      default:
+        console.error('which: illegal option -- ' + flag)
+        usage()
+    }
+  }
+  return false
+})
+
+process.exit(args.reduce(function (pv, current) {
+  try {
+    var f = which.sync(current, { all: all })
+    if (all)
+      f = f.join('\n')
+    if (!silent)
+      console.log(f)
+    return pv;
+  } catch (e) {
+    return 1;
+  }
+}, 0))
diff --git a/node_modules/npm-lifecycle/node_modules/which/package.json b/node_modules/npm-lifecycle/node_modules/which/package.json
new file mode 100644
index 000000000..a08065b2d
--- /dev/null
+++ b/node_modules/npm-lifecycle/node_modules/which/package.json
@@ -0,0 +1,65 @@
+{
+  "_from": "which@^1.3.1",
+  "_id": "which@1.3.1",
+  "_inBundle": false,
+  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_location": "/npm-lifecycle/which",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "which@^1.3.1",
+    "name": "which",
+    "escapedName": "which",
+    "rawSpec": "^1.3.1",
+    "saveSpec": null,
+    "fetchSpec": "^1.3.1"
+  },
+  "_requiredBy": [
+    "/npm-lifecycle"
+  ],
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
+  "_spec": "which@^1.3.1",
+  "_where": "/Users/claudiahdz/npm/cli/node_modules/npm-lifecycle",
+  "author": {
+    "name": "Isaac Z. Schlueter",
+    "email": "i@izs.me",
+    "url": "http://blog.izs.me"
+  },
+  "bin": {
+    "which": "bin/which"
+  },
+  "bugs": {
+    "url": "https://github.com/isaacs/node-which/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "isexe": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.1"
+  },
+  "files": [
+    "which.js",
+    "bin/which"
+  ],
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "license": "ISC",
+  "main": "which.js",
+  "name": "which",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-which.git"
+  },
+  "scripts": {
+    "changelog": "bash gen-changelog.sh",
+    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
+    "test": "tap test/*.js --cov"
+  },
+  "version": "1.3.1"
+}
diff --git a/node_modules/npm-lifecycle/node_modules/which/which.js b/node_modules/npm-lifecycle/node_modules/which/which.js
new file mode 100644
index 000000000..4347f91a1
--- /dev/null
+++ b/node_modules/npm-lifecycle/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)
+}
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/.bin/which b/node_modules/os-locale/node_modules/cross-spawn/node_modules/.bin/which
new file mode 120000
index 000000000..f62471c85
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/node_modules/.bin/which
@@ -0,0 +1 @@
+../which/bin/which
\ No newline at end of file
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/CHANGELOG.md b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/CHANGELOG.md
new file mode 100644
index 000000000..3d83d2694
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/CHANGELOG.md
@@ -0,0 +1,152 @@
+# Changes
+
+
+## 1.3.1
+
+* update deps
+* update travis
+
+## v1.3.0
+
+* Add nothrow option to which.sync
+* update tap
+
+## v1.2.14
+
+* appveyor: drop node 5 and 0.x
+* travis-ci: add node 6, drop 0.x
+
+## v1.2.13
+
+* test: Pass missing option to pass on windows
+* update tap
+* update isexe to 2.0.0
+* neveragain.tech pledge request
+
+## v1.2.12
+
+* Removed unused require
+
+## v1.2.11
+
+* Prevent changelog script from being included in package
+
+## v1.2.10
+
+* Use env.PATH only, not env.Path
+
+## v1.2.9
+
+* fix for paths starting with ../
+* Remove unused `is-absolute` module
+
+## v1.2.8
+
+* bullet items in changelog that contain (but don't start with) #
+
+## v1.2.7
+
+* strip 'update changelog' changelog entries out of changelog
+
+## v1.2.6
+
+* make the changelog bulleted
+
+## v1.2.5
+
+* make a changelog, and keep it up to date
+* don't include tests in package
+* Properly handle relative-path executables
+* appveyor
+* Attach error code to Not Found error
+* Make tests pass on Windows
+
+## v1.2.4
+
+* Fix typo
+
+## v1.2.3
+
+* update isexe, fix regression in pathExt handling
+
+## v1.2.2
+
+* update deps, use isexe module, test windows
+
+## v1.2.1
+
+* Sometimes windows PATH entries are quoted
+* Fixed a bug in the check for group and user mode bits. This bug was introduced during refactoring for supporting strict mode.
+* doc cli
+
+## v1.2.0
+
+* Add support for opt.all and -as cli flags
+* test the bin
+* update travis
+* Allow checking for multiple programs in bin/which
+* tap 2
+
+## v1.1.2
+
+* travis
+* Refactored and fixed undefined error on Windows
+* Support strict mode
+
+## v1.1.1
+
+* test +g exes against secondary groups, if available
+* Use windows exe semantics on cygwin & msys
+* cwd should be first in path on win32, not last
+* Handle lower-case 'env.Path' on Windows
+* Update docs
+* use single-quotes
+
+## v1.1.0
+
+* Add tests, depend on is-absolute
+
+## v1.0.9
+
+* which.js: root is allowed to execute files owned by anyone
+
+## v1.0.8
+
+* don't use graceful-fs
+
+## v1.0.7
+
+* add license to package.json
+
+## v1.0.6
+
+* isc license
+
+## 1.0.5
+
+* Awful typo
+
+## 1.0.4
+
+* Test for path absoluteness properly
+* win: Allow '' as a pathext if cmd has a . in it
+
+## 1.0.3
+
+* Remove references to execPath
+* Make `which.sync()` work on Windows by honoring the PATHEXT variable.
+* Make `isExe()` always return true on Windows.
+* MIT
+
+## 1.0.2
+
+* Only files can be exes
+
+## 1.0.1
+
+* Respect the PATHEXT env for win32 support
+* should 0755 the bin
+* binary
+* guts
+* package
+* 1st
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/LICENSE b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/LICENSE
new file mode 100644
index 000000000..19129e315
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/README.md b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/README.md
new file mode 100644
index 000000000..8c0b0cbf7
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/README.md
@@ -0,0 +1,51 @@
+# 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')
+
+// if nothrow option is used, returns null if not found
+resolved = which.sync('node', {nothrow: true})
+
+// 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)
+})
+```
+
+## CLI USAGE
+
+Same as the BSD `which(1)` binary.
+
+```
+usage: which [-as] program ...
+```
+
+## OPTIONS
+
+You may pass an options object as the second argument.
+
+- `path`: Use instead of the `PATH` environment variable.
+- `pathExt`: Use instead of the `PATHEXT` environment variable.
+- `all`: Return all matches, instead of just the first one.  Note that
+  this means the function returns an array of strings instead of a
+  single string.
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/bin/which b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/bin/which
new file mode 100755
index 000000000..7cee3729e
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/bin/which
@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+var which = require("../")
+if (process.argv.length < 3)
+  usage()
+
+function usage () {
+  console.error('usage: which [-as] program ...')
+  process.exit(1)
+}
+
+var all = false
+var silent = false
+var dashdash = false
+var args = process.argv.slice(2).filter(function (arg) {
+  if (dashdash || !/^-/.test(arg))
+    return true
+
+  if (arg === '--') {
+    dashdash = true
+    return false
+  }
+
+  var flags = arg.substr(1).split('')
+  for (var f = 0; f < flags.length; f++) {
+    var flag = flags[f]
+    switch (flag) {
+      case 's':
+        silent = true
+        break
+      case 'a':
+        all = true
+        break
+      default:
+        console.error('which: illegal option -- ' + flag)
+        usage()
+    }
+  }
+  return false
+})
+
+process.exit(args.reduce(function (pv, current) {
+  try {
+    var f = which.sync(current, { all: all })
+    if (all)
+      f = f.join('\n')
+    if (!silent)
+      console.log(f)
+    return pv;
+  } catch (e) {
+    return 1;
+  }
+}, 0))
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/package.json b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/package.json
new file mode 100644
index 000000000..8d301e587
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/package.json
@@ -0,0 +1,65 @@
+{
+  "_from": "which@^1.2.9",
+  "_id": "which@1.3.1",
+  "_inBundle": false,
+  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_location": "/os-locale/cross-spawn/which",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "which@^1.2.9",
+    "name": "which",
+    "escapedName": "which",
+    "rawSpec": "^1.2.9",
+    "saveSpec": null,
+    "fetchSpec": "^1.2.9"
+  },
+  "_requiredBy": [
+    "/os-locale/cross-spawn"
+  ],
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
+  "_spec": "which@^1.2.9",
+  "_where": "/Users/claudiahdz/npm/cli/node_modules/os-locale/node_modules/cross-spawn",
+  "author": {
+    "name": "Isaac Z. Schlueter",
+    "email": "i@izs.me",
+    "url": "http://blog.izs.me"
+  },
+  "bin": {
+    "which": "bin/which"
+  },
+  "bugs": {
+    "url": "https://github.com/isaacs/node-which/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "isexe": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.1"
+  },
+  "files": [
+    "which.js",
+    "bin/which"
+  ],
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "license": "ISC",
+  "main": "which.js",
+  "name": "which",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-which.git"
+  },
+  "scripts": {
+    "changelog": "bash gen-changelog.sh",
+    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
+    "test": "tap test/*.js --cov"
+  },
+  "version": "1.3.1"
+}
diff --git a/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/which.js b/node_modules/os-locale/node_modules/cross-spawn/node_modules/which/which.js
new file mode 100644
index 000000000..4347f91a1
--- /dev/null
+++ b/node_modules/os-locale/node_modules/cross-spawn/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)
+}
diff --git a/node_modules/pacote/node_modules/.bin/which b/node_modules/pacote/node_modules/.bin/which
new file mode 120000
index 000000000..f62471c85
--- /dev/null
+++ b/node_modules/pacote/node_modules/.bin/which
@@ -0,0 +1 @@
+../which/bin/which
\ No newline at end of file
diff --git a/node_modules/pacote/node_modules/which/CHANGELOG.md b/node_modules/pacote/node_modules/which/CHANGELOG.md
new file mode 100644
index 000000000..3d83d2694
--- /dev/null
+++ b/node_modules/pacote/node_modules/which/CHANGELOG.md
@@ -0,0 +1,152 @@
+# Changes
+
+
+## 1.3.1
+
+* update deps
+* update travis
+
+## v1.3.0
+
+* Add nothrow option to which.sync
+* update tap
+
+## v1.2.14
+
+* appveyor: drop node 5 and 0.x
+* travis-ci: add node 6, drop 0.x
+
+## v1.2.13
+
+* test: Pass missing option to pass on windows
+* update tap
+* update isexe to 2.0.0
+* neveragain.tech pledge request
+
+## v1.2.12
+
+* Removed unused require
+
+## v1.2.11
+
+* Prevent changelog script from being included in package
+
+## v1.2.10
+
+* Use env.PATH only, not env.Path
+
+## v1.2.9
+
+* fix for paths starting with ../
+* Remove unused `is-absolute` module
+
+## v1.2.8
+
+* bullet items in changelog that contain (but don't start with) #
+
+## v1.2.7
+
+* strip 'update changelog' changelog entries out of changelog
+
+## v1.2.6
+
+* make the changelog bulleted
+
+## v1.2.5
+
+* make a changelog, and keep it up to date
+* don't include tests in package
+* Properly handle relative-path executables
+* appveyor
+* Attach error code to Not Found error
+* Make tests pass on Windows
+
+## v1.2.4
+
+* Fix typo
+
+## v1.2.3
+
+* update isexe, fix regression in pathExt handling
+
+## v1.2.2
+
+* update deps, use isexe module, test windows
+
+## v1.2.1
+
+* Sometimes windows PATH entries are quoted
+* Fixed a bug in the check for group and user mode bits. This bug was introduced during refactoring for supporting strict mode.
+* doc cli
+
+## v1.2.0
+
+* Add support for opt.all and -as cli flags
+* test the bin
+* update travis
+* Allow checking for multiple programs in bin/which
+* tap 2
+
+## v1.1.2
+
+* travis
+* Refactored and fixed undefined error on Windows
+* Support strict mode
+
+## v1.1.1
+
+* test +g exes against secondary groups, if available
+* Use windows exe semantics on cygwin & msys
+* cwd should be first in path on win32, not last
+* Handle lower-case 'env.Path' on Windows
+* Update docs
+* use single-quotes
+
+## v1.1.0
+
+* Add tests, depend on is-absolute
+
+## v1.0.9
+
+* which.js: root is allowed to execute files owned by anyone
+
+## v1.0.8
+
+* don't use graceful-fs
+
+## v1.0.7
+
+* add license to package.json
+
+## v1.0.6
+
+* isc license
+
+## 1.0.5
+
+* Awful typo
+
+## 1.0.4
+
+* Test for path absoluteness properly
+* win: Allow '' as a pathext if cmd has a . in it
+
+## 1.0.3
+
+* Remove references to execPath
+* Make `which.sync()` work on Windows by honoring the PATHEXT variable.
+* Make `isExe()` always return true on Windows.
+* MIT
+
+## 1.0.2
+
+* Only files can be exes
+
+## 1.0.1
+
+* Respect the PATHEXT env for win32 support
+* should 0755 the bin
+* binary
+* guts
+* package
+* 1st
diff --git a/node_modules/pacote/node_modules/which/LICENSE b/node_modules/pacote/node_modules/which/LICENSE
new file mode 100644
index 000000000..19129e315
--- /dev/null
+++ b/node_modules/pacote/node_modules/which/LICENSE
@@ -0,0 +1,15 @@
+The ISC License
+
+Copyright (c) Isaac Z. Schlueter and Contributors
+
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
+IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/node_modules/pacote/node_modules/which/README.md b/node_modules/pacote/node_modules/which/README.md
new file mode 100644
index 000000000..8c0b0cbf7
--- /dev/null
+++ b/node_modules/pacote/node_modules/which/README.md
@@ -0,0 +1,51 @@
+# 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')
+
+// if nothrow option is used, returns null if not found
+resolved = which.sync('node', {nothrow: true})
+
+// 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)
+})
+```
+
+## CLI USAGE
+
+Same as the BSD `which(1)` binary.
+
+```
+usage: which [-as] program ...
+```
+
+## OPTIONS
+
+You may pass an options object as the second argument.
+
+- `path`: Use instead of the `PATH` environment variable.
+- `pathExt`: Use instead of the `PATHEXT` environment variable.
+- `all`: Return all matches, instead of just the first one.  Note that
+  this means the function returns an array of strings instead of a
+  single string.
diff --git a/node_modules/pacote/node_modules/which/bin/which b/node_modules/pacote/node_modules/which/bin/which
new file mode 100755
index 000000000..7cee3729e
--- /dev/null
+++ b/node_modules/pacote/node_modules/which/bin/which
@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+var which = require("../")
+if (process.argv.length < 3)
+  usage()
+
+function usage () {
+  console.error('usage: which [-as] program ...')
+  process.exit(1)
+}
+
+var all = false
+var silent = false
+var dashdash = false
+var args = process.argv.slice(2).filter(function (arg) {
+  if (dashdash || !/^-/.test(arg))
+    return true
+
+  if (arg === '--') {
+    dashdash = true
+    return false
+  }
+
+  var flags = arg.substr(1).split('')
+  for (var f = 0; f < flags.length; f++) {
+    var flag = flags[f]
+    switch (flag) {
+      case 's':
+        silent = true
+        break
+      case 'a':
+        all = true
+        break
+      default:
+        console.error('which: illegal option -- ' + flag)
+        usage()
+    }
+  }
+  return false
+})
+
+process.exit(args.reduce(function (pv, current) {
+  try {
+    var f = which.sync(current, { all: all })
+    if (all)
+      f = f.join('\n')
+    if (!silent)
+      console.log(f)
+    return pv;
+  } catch (e) {
+    return 1;
+  }
+}, 0))
diff --git a/node_modules/pacote/node_modules/which/package.json b/node_modules/pacote/node_modules/which/package.json
new file mode 100644
index 000000000..b2d5b490a
--- /dev/null
+++ b/node_modules/pacote/node_modules/which/package.json
@@ -0,0 +1,65 @@
+{
+  "_from": "which@^1.3.1",
+  "_id": "which@1.3.1",
+  "_inBundle": false,
+  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_location": "/pacote/which",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "which@^1.3.1",
+    "name": "which",
+    "escapedName": "which",
+    "rawSpec": "^1.3.1",
+    "saveSpec": null,
+    "fetchSpec": "^1.3.1"
+  },
+  "_requiredBy": [
+    "/pacote"
+  ],
+  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
+  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
+  "_spec": "which@^1.3.1",
+  "_where": "/Users/claudiahdz/npm/cli/node_modules/pacote",
+  "author": {
+    "name": "Isaac Z. Schlueter",
+    "email": "i@izs.me",
+    "url": "http://blog.izs.me"
+  },
+  "bin": {
+    "which": "bin/which"
+  },
+  "bugs": {
+    "url": "https://github.com/isaacs/node-which/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "isexe": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "Like which(1) unix command. Find the first instance of an executable in the PATH.",
+  "devDependencies": {
+    "mkdirp": "^0.5.0",
+    "rimraf": "^2.6.2",
+    "tap": "^12.0.1"
+  },
+  "files": [
+    "which.js",
+    "bin/which"
+  ],
+  "homepage": "https://github.com/isaacs/node-which#readme",
+  "license": "ISC",
+  "main": "which.js",
+  "name": "which",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/isaacs/node-which.git"
+  },
+  "scripts": {
+    "changelog": "bash gen-changelog.sh",
+    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
+    "test": "tap test/*.js --cov"
+  },
+  "version": "1.3.1"
+}
diff --git a/node_modules/pacote/node_modules/which/which.js b/node_modules/pacote/node_modules/which/which.js
new file mode 100644
index 000000000..4347f91a1
--- /dev/null
+++ b/node_modules/pacote/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)
+}
diff --git a/node_modules/which/CHANGELOG.md b/node_modules/which/CHANGELOG.md
index 3d83d2694..7fb1f2033 100644
--- a/node_modules/which/CHANGELOG.md
+++ b/node_modules/which/CHANGELOG.md
@@ -1,6 +1,20 @@
 # Changes
 
 
+## 2.0.2
+
+* Rename bin to `node-which`
+
+## 2.0.1
+
+* generate changelog and publish on version bump
+* enforce 100% test coverage
+* Promise interface
+
+## 2.0.0
+
+* Parallel tests, modern JavaScript, and drop support for node < 8
+
 ## 1.3.1
 
 * update deps
diff --git a/node_modules/which/README.md b/node_modules/which/README.md
index 8c0b0cbf7..cd833509f 100644
--- a/node_modules/which/README.md
+++ b/node_modules/which/README.md
@@ -17,6 +17,9 @@ which('node', function (er, resolvedPath) {
   // if it is found, then the absolute path to the exec is returned
 })
 
+// or promise
+which('node').then(resolvedPath => { ... }).catch(er => { ... not found ... })
+
 // sync usage
 // throws if not found
 var resolved = which.sync('node')
diff --git a/node_modules/which/bin/node-which b/node_modules/which/bin/node-which
new file mode 100755
index 000000000..7cee3729e
--- /dev/null
+++ b/node_modules/which/bin/node-which
@@ -0,0 +1,52 @@
+#!/usr/bin/env node
+var which = require("../")
+if (process.argv.length < 3)
+  usage()
+
+function usage () {
+  console.error('usage: which [-as] program ...')
+  process.exit(1)
+}
+
+var all = false
+var silent = false
+var dashdash = false
+var args = process.argv.slice(2).filter(function (arg) {
+  if (dashdash || !/^-/.test(arg))
+    return true
+
+  if (arg === '--') {
+    dashdash = true
+    return false
+  }
+
+  var flags = arg.substr(1).split('')
+  for (var f = 0; f < flags.length; f++) {
+    var flag = flags[f]
+    switch (flag) {
+      case 's':
+        silent = true
+        break
+      case 'a':
+        all = true
+        break
+      default:
+        console.error('which: illegal option -- ' + flag)
+        usage()
+    }
+  }
+  return false
+})
+
+process.exit(args.reduce(function (pv, current) {
+  try {
+    var f = which.sync(current, { all: all })
+    if (all)
+      f = f.join('\n')
+    if (!silent)
+      console.log(f)
+    return pv;
+  } catch (e) {
+    return 1;
+  }
+}, 0))
diff --git a/node_modules/which/package.json b/node_modules/which/package.json
index 9a8a8b765..74e41c0da 100644
--- a/node_modules/which/package.json
+++ b/node_modules/which/package.json
@@ -1,41 +1,35 @@
 {
-  "_from": "which@1.3.1",
-  "_id": "which@1.3.1",
+  "_from": "which@2.0.2",
+  "_id": "which@2.0.2",
   "_inBundle": false,
-  "_integrity": "sha512-HxJdYWq1MTIQbJ3nw0cqssHoTNU267KlrDuGZ1WYlxDStUtKUhOaJmh112/TZmHxxUfuJqPXSOm7tDyas0OSIQ==",
+  "_integrity": "sha512-BLI3Tl1TW3Pvl70l3yq3Y64i+awpwXqsGBYWkkqMtnbXgrMD+yj7rhW0kuEDxzJaYXGjEW5ogapKNMEKNMjibA==",
   "_location": "/which",
   "_phantomChildren": {},
   "_requested": {
     "type": "version",
     "registry": true,
-    "raw": "which@1.3.1",
+    "raw": "which@2.0.2",
     "name": "which",
     "escapedName": "which",
-    "rawSpec": "1.3.1",
+    "rawSpec": "2.0.2",
     "saveSpec": null,
-    "fetchSpec": "1.3.1"
+    "fetchSpec": "2.0.2"
   },
   "_requiredBy": [
     "#USER",
-    "/",
-    "/cross-spawn",
-    "/foreground-child/cross-spawn",
-    "/libnpx",
-    "/node-gyp",
-    "/npm-lifecycle",
-    "/pacote"
+    "/"
   ],
-  "_resolved": "https://registry.npmjs.org/which/-/which-1.3.1.tgz",
-  "_shasum": "a45043d54f5805316da8d62f9f50918d3da70b0a",
-  "_spec": "which@1.3.1",
-  "_where": "/Users/rebecca/code/npm",
+  "_resolved": "https://registry.npmjs.org/which/-/which-2.0.2.tgz",
+  "_shasum": "7c6a8dd0a636a0327e10b59c9286eee93f3f51b1",
+  "_spec": "which@2.0.2",
+  "_where": "/Users/claudiahdz/npm/cli",
   "author": {
     "name": "Isaac Z. Schlueter",
     "email": "i@izs.me",
     "url": "http://blog.izs.me"
   },
   "bin": {
-    "which": "./bin/which"
+    "node-which": "bin/node-which"
   },
   "bugs": {
     "url": "https://github.com/isaacs/node-which/issues"
@@ -49,11 +43,14 @@
   "devDependencies": {
     "mkdirp": "^0.5.0",
     "rimraf": "^2.6.2",
-    "tap": "^12.0.1"
+    "tap": "^14.6.9"
+  },
+  "engines": {
+    "node": ">= 8"
   },
   "files": [
     "which.js",
-    "bin/which"
+    "bin/node-which"
   ],
   "homepage": "https://github.com/isaacs/node-which#readme",
   "license": "ISC",
@@ -64,9 +61,17 @@
     "url": "git://github.com/isaacs/node-which.git"
   },
   "scripts": {
-    "changelog": "bash gen-changelog.sh",
-    "postversion": "npm run changelog && git add CHANGELOG.md && git commit -m 'update changelog - '${npm_package_version}",
-    "test": "tap test/*.js --cov"
+    "changelog": "git add CHANGELOG.md",
+    "postchangelog": "git commit -m 'update changelog - '${npm_package_version}",
+    "postpublish": "git push origin --follow-tags",
+    "postversion": "npm publish",
+    "prechangelog": "bash gen-changelog.sh",
+    "prepublish": "npm run changelog",
+    "preversion": "npm test",
+    "test": "tap"
+  },
+  "tap": {
+    "check-coverage": true
   },
-  "version": "1.3.1"
+  "version": "2.0.2"
 }
diff --git a/node_modules/which/which.js b/node_modules/which/which.js
index 4347f91a1..82afffd21 100644
--- a/node_modules/which/which.js
+++ b/node_modules/which/which.js
@@ -1,120 +1,107 @@
-module.exports = which
-which.sync = whichSync
-
-var isWindows = process.platform === 'win32' ||
+const isWindows = process.platform === 'win32' ||
     process.env.OSTYPE === 'cygwin' ||
     process.env.OSTYPE === 'msys'
 
-var path = require('path')
-var COLON = isWindows ? ';' : ':'
-var isexe = require('isexe')
+const path = require('path')
+const COLON = isWindows ? ';' : ':'
+const isexe = require('isexe')
 
-function getNotFoundError (cmd) {
-  var er = new Error('not found: ' + cmd)
-  er.code = 'ENOENT'
+const getNotFoundError = (cmd) =>
+  Object.assign(new Error(`not found: ${cmd}`), { code: 'ENOENT' })
 
-  return er
-}
+const getPathInfo = (cmd, opt) => {
+  const colon = opt.colon || COLON
 
-function getPathInfo (cmd, opt) {
-  var colon = opt.colon || COLON
-  var pathEnv = opt.path || process.env.PATH || ''
-  var pathExt = ['']
-
-  pathEnv = pathEnv.split(colon)
+  // If it has a slash, then we don't bother searching the pathenv.
+  // just check the file itself, and that's it.
+  const pathEnv = cmd.match(/\//) || isWindows && cmd.match(/\\/) ? ['']
+    : (
+      [
+        // windows always checks the cwd first
+        ...(isWindows ? [process.cwd()] : []),
+        ...(opt.path || process.env.PATH ||
+          /* istanbul ignore next: very unusual */ '').split(colon),
+      ]
+    )
+  const pathExtExe = isWindows
+    ? opt.pathExt || process.env.PATHEXT || '.EXE;.CMD;.BAT;.COM'
+    : ''
+  const pathExt = isWindows ? pathExtExe.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
+    pathEnv,
+    pathExt,
+    pathExtExe,
   }
 }
 
-function which (cmd, opt, cb) {
+const which = (cmd, opt, cb) => {
   if (typeof opt === 'function') {
     cb = opt
     opt = {}
   }
+  if (!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)
+  const { pathEnv, pathExt, pathExtExe } = getPathInfo(cmd, opt)
+  const found = []
+
+  const step = i => new Promise((resolve, reject) => {
+    if (i === pathEnv.length)
+      return opt.all && found.length ? resolve(found)
+        : reject(getNotFoundError(cmd))
+
+    const ppRaw = pathEnv[i]
+    const pathPart = /^".*"$/.test(ppRaw) ? ppRaw.slice(1, -1) : ppRaw
+
+    const pCmd = path.join(pathPart, cmd)
+    const p = !pathPart && /^\.[\\\/]/.test(cmd) ? cmd.slice(0, 2) + pCmd
+      : pCmd
+
+    resolve(subStep(p, i, 0))
+  })
+
+  const subStep = (p, i, ii) => new Promise((resolve, reject) => {
+    if (ii === pathExt.length)
+      return resolve(step(i + 1))
+    const ext = pathExt[ii]
+    isexe(p + ext, { pathExt: pathExtExe }, (er, is) => {
+      if (!er && is) {
+        if (opt.all)
+          found.push(p + ext)
+        else
+          return resolve(p + ext)
+      }
+      return resolve(subStep(p, i, ii + 1))
+    })
+  })
+
+  return cb ? step(0).then(res => cb(null, res), cb) : step(0)
 }
 
-function whichSync (cmd, opt) {
+const whichSync = (cmd, opt) => {
   opt = opt || {}
 
-  var info = getPathInfo(cmd, opt)
-  var pathEnv = info.env
-  var pathExt = info.ext
-  var pathExtExe = info.extExe
-  var found = []
+  const { pathEnv, pathExt, pathExtExe } = getPathInfo(cmd, opt)
+  const 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)
+  for (let i = 0; i < pathEnv.length; i ++) {
+    const ppRaw = pathEnv[i]
+    const pathPart = /^".*"$/.test(ppRaw) ? ppRaw.slice(1, -1) : ppRaw
 
-    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
+    const pCmd = path.join(pathPart, cmd)
+    const p = !pathPart && /^\.[\\\/]/.test(cmd) ? cmd.slice(0, 2) + pCmd
+      : pCmd
+
+    for (let j = 0; j < pathExt.length; j ++) {
+      const cur = p + pathExt[j]
       try {
-        is = isexe.sync(cur, { pathExt: pathExtExe })
+        const is = isexe.sync(cur, { pathExt: pathExtExe })
         if (is) {
           if (opt.all)
             found.push(cur)
@@ -133,3 +120,6 @@ function whichSync (cmd, opt) {
 
   throw getNotFoundError(cmd)
 }
+
+module.exports = which
+which.sync = whichSync