--- /dev/null
+module.exports = isexe
+isexe.sync = sync
+
+var fs = require('fs')
+
+function checkPathExt (path, options) {
+ var pathext = options.pathExt !== undefined ?
+ options.pathExt : process.env.PATHEXT
+
+ if (!pathext) {
+ return true
+ }
+
+ pathext = pathext.split(';')
+ if (pathext.indexOf('') !== -1) {
+ return true
+ }
+ for (var i = 0; i < pathext.length; i++) {
+ var p = pathext[i].toLowerCase()
+ if (p && path.substr(-p.length).toLowerCase() === p) {
+ return true
+ }
+ }
+ return false
+}
+
+function isexe (path, options, cb) {
+ fs.stat(path, function (er, st) {
+ cb(er, er ? false : checkPathExt(path, options))
+ })
+}
+
+function sync (path, options) {
+ fs.statSync(path)
+ return checkPathExt(path, options)
+}