fix: fs.readdir() on ancient nodes that don't know about options

Fix: #218

Author: isaacs

graceful-fs.js

@@ -191,24 +191,43 @@ function patch (fs) {
 
   var fs$readdir = fs.readdir
   fs.readdir = readdir
+  var noReaddirOptionVersions = /^v[0-5]\./
   function readdir (path, options, cb) {
     if (typeof options === 'function')
       cb = options, options = null
 
+    var go$readdir = noReaddirOptionVersions.test(process.version)
+      ? function go$readdir (path, options, cb, startTime) {
+        return fs$readdir(path, fs$readdirCallback(
+          path, options, cb, startTime
+        ))
+      }
+      : function go$readdir (path, options, cb, startTime) {
+        return fs$readdir(path, options, fs$readdirCallback(
+          path, options, cb, startTime
+        ))
+      }
+
     return go$readdir(path, options, cb)
 
-    function go$readdir (path, options, cb, startTime) {
-      return fs$readdir(path, options, function (err, files) {
+    function fs$readdirCallback (path, options, cb, startTime) {
+      return function (err, files) {
         if (err && (err.code === 'EMFILE' || err.code === 'ENFILE'))
-          enqueue([go$readdir, [path, options, cb], err, startTime || Date.now(), Date.now()])
+          enqueue([
+            go$readdir,
+            [path, options, cb],
+            err,
+            startTime || Date.now(),
+            Date.now()
+          ])
         else {
           if (files && files.sort)
             files.sort()
 
           if (typeof cb === 'function')
             cb.call(this, err, files)
         }
-      })
+      }
     }
   }