index.js
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index.js
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			var fs = require('fs')
			var core
			if (process.platform === 'win32' \|\| global.TESTING_WINDOWS) {
			core = require('./windows.js')
			} else {
			core = require('./mode.js')
			}

			module.exports = isexe
			isexe.sync = sync

			function isexe (path, options, cb) {
			if (typeof options === 'function') {
			cb = options
			options = {}
			}

			if (!cb) {
			if (typeof Promise !== 'function') {
			throw new TypeError('callback not provided')
			}

			return new Promise(function (resolve, reject) {
			isexe(path, options \|\| {}, function (er, is) {
			if (er) {
			reject(er)
			} else {
			resolve(is)
			}
			})
			})
			}

			core(path, options \|\| {}, function (er, is) {
			// ignore EACCES because that just means we aren't allowed to run it
			if (er) {
			if (er.code === 'EACCES' \|\| options && options.ignoreErrors) {
			er = null
			is = false
			}
			}
			cb(er, is)
			})
			}

			function sync (path, options) {
			// my kingdom for a filtered catch
			try {
			return core.sync(path, options \|\| {})
			} catch (er) {
			if (options && options.ignoreErrors \|\| er.code === 'EACCES') {
			return false
			} else {
			throw er
			}
			}
			}