add maven badge support

site/src/site/sphinx/_static/add_badges.js

@@ -0,0 +1,29 @@
+  function addBadge(parent, src, href) {
+    var img = document.createElement('img');
+    img.src = src;
+    var a = document.createElement('a');
+    a.href = href;
+    a.appendChild(img);
+    parent.appendChild(a);
+    parent.appendChild(document.createElement('br'));
+  }
+  
+  function addBadges(parent) {
+    var li = document.createElement('li');
+    li.className = 'toctree-l1';
+    var div = document.createElement('div');
+    div.className = 'project-badges';
+    addBadge(div, 'https://img.shields.io/maven-central/v/com.taobao.arthas/arthas-packaging.svg?style=flat-square',
+      'https://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22com.taobao.arthas%22%20AND%20a%3A%22arthas-packaging%22');
+    li.appendChild(div);
+    parent.appendChild(li);
+  }
+  
+  var menus = document.getElementsByClassName("wy-menu wy-menu-vertical");
+  if (menus.length > 0) {
+    var menu = menus[0];
+    var lists = menu.getElementsByTagName('ul');
+    if (lists.length > 0) {
+      addBadges(lists[0]);
+    }
+  }

site/src/site/sphinx/_templates/layout.html

@@ -11,5 +11,7 @@
     <a href="https://github.com/alibaba/arthas">Fork me at GitHub</a>
   </div>
 </div>
+
+<script type="text/javascript" src="{{ pathto('_static/add_badges.js', 1) }}"></script>
 {{ super() }}
 {% endblock %}