Fix.

node_modules/is-directory/index.js

@@ -0,0 +1,65 @@
+/*!
+ * is-directory <https://github.com/jonschlinkert/is-directory>
+ *
+ * Copyright (c) 2014-2015, Jon Schlinkert.
+ * Licensed under the MIT License.
+ */
+
+'use strict';
+
+var fs = require('fs');
+
+/**
+ * async
+ */
+
+function isDirectory(filepath, cb) {
+  if (typeof cb !== 'function') {
+    throw new Error('expected a callback function');
+  }
+
+  if (typeof filepath !== 'string') {
+    cb(new Error('expected filepath to be a string'));
+    return;
+  }
+
+  fs.stat(filepath, function(err, stats) {
+    if (err) {
+      if (err.code === 'ENOENT') {
+        cb(null, false);
+        return;
+      }
+      cb(err);
+      return;
+    }
+    cb(null, stats.isDirectory());
+  });
+}
+
+/**
+ * sync
+ */
+
+isDirectory.sync = function isDirectorySync(filepath) {
+  if (typeof filepath !== 'string') {
+    throw new Error('expected filepath to be a string');
+  }
+
+  try {
+    var stat = fs.statSync(filepath);
+    return stat.isDirectory();
+  } catch (err) {
+    if (err.code === 'ENOENT') {
+      return false;
+    } else {
+      throw err;
+    }
+  }
+  return false;
+};
+
+/**
+ * Expose `isDirectory`
+ */
+
+module.exports = isDirectory;