update to take jupyter-server/jupyter_server#180

Author: echarles

jupyterlab/labapp.py

@@ -506,6 +506,12 @@ class LabApp(ExtensionApp, ExtensionAppJinjaMixin):
     # The config.
     c = None
 
+    @staticmethod
+    def _jupyter_server_extension_paths():
+        return [{
+            'module': 'jupyterlab'
+        }]
+
     def initialize_templates(self):
         if self.c == None:
             self.c = load_config(self)
@@ -554,10 +560,10 @@ def initialize_handlers(self):
             self.c = load_config(self)
             self.static_paths = [self.c.static_dir]
             self.template_paths = [self.c.templates_dir]
-        if not self.serverapp.jpserver_extensions.get('jupyterlab', False):
-            msg = 'JupyterLab server extension not enabled, manually loading...'
-            self.log.warning(msg)
-            load_jupyter_server_extension(self)
+        # TODO(@echarles) Discuss with @Zsailer https://github.com/jupyter/jupyter_server/pull/180
+#        if not self.serverapp.jpserver_extensions.get('jupyterlab', False):
+        self.log.warning('JupyterLab server extension not enabled, manually loading...')
+        load_jupyter_server_extension(self)
 
 #-----------------------------------------------------------------------------
 # Main entry point

setup.py

@@ -143,7 +143,7 @@ def run(self):
     'jinja2>=2.10',
     'nbclassic@ git+https://github.com/datalayer-contrib/jupyter-notebook-classic@jupyterlab',
     'jupyterlab_server@ git+https://github.com/datalayer-contrib/jupyterlab-server@jupyter_server',
-    'jupyter_server@ git+https://github.com/datalayer-contrib/jupyter-server.git@extension_handlers',
+    'jupyter_server@ git+https://github.com/datalayer-contrib/jupyter-server.git@discover-extensionapp-config',
 ]
 
 setup_args['extras_require'] = {