1  var fs = require('fs')
 2  var core
 3  if (process.platform === 'win32' || global.TESTING_WINDOWS) {
 4    core = require('./windows.js')
 5  } else {
 6    core = require('./mode.js')
 7  }
 8  
 9  module.exports = isexe
10  isexe.sync = sync
11  
12  function isexe (path, options, cb) {
13    if (typeof options === 'function') {
14      cb = options
15      options = {}
16    }
17  
18    if (!cb) {
19      if (typeof Promise !== 'function') {
20        throw new TypeError('callback not provided')
21      }
22  
23      return new Promise(function (resolve, reject) {
24        isexe(path, options || {}, function (er, is) {
25          if (er) {
26            reject(er)
27          } else {
28            resolve(is)
29          }
30        })
31      })
32    }
33  
34    core(path, options || {}, function (er, is) {
35      // ignore EACCES because that just means we aren't allowed to run it
36      if (er) {
37        if (er.code === 'EACCES' || options && options.ignoreErrors) {
38          er = null
39          is = false
40        }
41      }
42      cb(er, is)
43    })
44  }
45  
46  function sync (path, options) {
47    // my kingdom for a filtered catch
48    try {
49      return core.sync(path, options || {})
50    } catch (er) {
51      if (options && options.ignoreErrors || er.code === 'EACCES') {
52        return false
53      } else {
54        throw er
55      }
56    }
57  }