fix online doc search (#2700)

Co-authored-by: arthw <14088817+arthw@users.noreply.github.com>

docs/build_docs/update_html.py

@@ -28,19 +28,38 @@ def update_version_link(version, folder_name, index_file):
               <a href="{}versions.html">{}▼</a>
               <p>Click link above to switch version</p>
             </div>'''.format(index_path, folder_name)
-        #print(index_buf.find(key_str))
         index_buf = index_buf.replace(key_str, version_list)
-        #print(index_buf)
 
     with open(index_file, "w") as f:
         f.write(index_buf)
 
+def update_search(folder):
+    search_file_name="{}/search.html".format(folder)
+
+    with open(search_file_name, "r") as f:
+        index_buf = f.read()
+        key_str='<script src="_static/searchtools.js"></script>'
+        version_list = '''<!--[if lt IE 9]>
+    <script src="_static/js/html5shiv.min.js"></script>
+    <![endif]-->
+        <script src="_static/jquery.js?v=5d32c60e"></script>
+        <script src="_static/_sphinx_javascript_frameworks_compat.js?v=2cd50e6c"></script>
+        <script src="_static/documentation_options.js?v=fc837d61"></script>
+        <script src="_static/doctools.js?v=9a2dae69"></script>
+        <script src="_static/sphinx_highlight.js?v=dc90522c"></script>
+    <script src="_static/js/theme.js"></script>
+    <script src="_static/searchtools.js"></script>'''
+        index_buf = index_buf.replace(key_str, version_list)
+
+    with open(search_file_name, "w") as f:
+        f.write(index_buf)
+
 
 def main(folder, version):
     folder_name=os.path.basename(folder)
     for index_file in glob.glob('{}/**/*.html'.format(folder),recursive = True):
         update_version_link(version, folder_name, index_file)
-
+    update_search(folder)
 
 def help(me):
     print("python {} html_folder version".format(me))