fix #6 (#16)

Author: EnixCoda

crawlsite.js

@@ -56,7 +56,13 @@ function slugify(str) {
 
 function mkdirSync(dirPath) {
   try {
-    fs.mkdirSync(dirPath);
+    dirPath.split('/').reduce((parentPath, dirName) => {
+      const currentPath = parentPath + dirName;
+      if (!fs.existsSync(currentPath)) {
+        fs.mkdirSync(currentPath);
+      }
+      return currentPath + '/';
+    }, '');
   } catch (err) {
     if (err.code !== 'EEXIST') {
       throw err;