chore: add util file

Author: jeremenichelli

src/utils/treePluginEnhacer.js

@@ -0,0 +1,24 @@
+const fs = require('fs');
+const FrontMatter = require('front-matter');
+
+module.exports = function(item, options) {
+  item.url = item.path
+    .replace(item.extension, '')
+    .replace(options.dir, '')
+    .replace(/\/index$/, '')
+    .replace(/^$/, '/');
+
+  if (item.type === 'file') {
+    // remove underscore from fetched files
+    if (item.name[0] === '_') {
+      item.name = item.name.replace('_', '');
+      item.url = item.url.replace('_', '');
+    }
+
+    let content = fs.readFileSync(item.path, 'utf8');
+    let { attributes } = FrontMatter(content);
+
+    Object.assign(item, attributes);
+    item.anchors = []; // TODO: Add actual anchors
+  }
+}