obtain valid url even baseurl is set (refs #2)

Author: tomoki1207

scripts/components/Root.js

@@ -5,8 +5,10 @@ import Directory from './Directory';
 export default class Root extends Directory {
 
   componentWillMount() {
-    // FIXME: exists altanarive way?
-    const baseUrl = document.querySelector('header.main-header a.logo').getAttribute('href');
+    // obtain repository URI
+    // - localhost:8080/owner/repo -> /owner/repo
+    // - localhost:8080/gitbucket/owner/repo -> /owner/repo
+    const baseUrl = document.querySelector('header.main-header a.logo').getAttribute('href').replace(`${document.location.protocol}//${document.location.host}`, '');
     const relPath = document.location.pathname.replace(baseUrl, '');
     let rootPath;
     let branch;