JupyterLab Server as Server Extension

.github/workflows/tests.yml

@@ -29,19 +29,20 @@ jobs:
             PLATFORM: 'windows-latest'
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v1
       - name: Cache pip
         uses: actions/cache@v1
         with:
           path: ~/.cache/pip
           key: ${{ runner.os }}-py-${{ matrix.PYTHON_VERSION }}-pip-${{ hashFiles('**/setup.py') }}
-      - name: Setup python
+      - name: Setup python ${{ matrix.PYTHON_VERSION }}
         uses: actions/setup-python@v1
         with:
           python-version: ${{ matrix.PYTHON_VERSION }}
+          architecture: 'x64'
       - name: Install python dependencies
         run: |
-          pip install setuptools pip --upgrade
+          pip install setuptools pip --upgrade --user
           pip install -v -e ".[test]"
       - name: Show python environment
         run: |
@@ -50,7 +51,7 @@ jobs:
       - name: Run python tests
         # See `setup.cfg` for full test options
         run: |
-          pytest --cov-fail-under 71
+          pytest
       - name: Upload coverage
         run: |
           codecov

conftest.py

@@ -0,0 +1 @@
+pytest_plugins = ['pytest_jupyter_server']

jupyterlab_server/__init__.py

@@ -16,3 +16,11 @@
     'SETTINGS_EXTENSION',
     'WORKSPACE_EXTENSION'
 ]
+
+def _jupyter_server_extension_points():
+    return [
+        {
+            'module': 'jupyterlab_server',
+            'app': LabServerApp
+        }
+    ]

jupyterlab_server/app.py

@@ -4,18 +4,34 @@
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 
+import os, jinja2
+from traitlets import Unicode
+from jinja2 import Environment, FileSystemLoader
+from traitlets import Bool, Unicode, default
+from jupyter_server.extension.application import ExtensionApp, ExtensionAppJinjaMixin
 from traitlets import Unicode, Integer, Dict
 
-from .server import ServerApp
+from ._version import __version__
+from .server import url_path_join as ujoin
 from .handlers import add_handlers, LabConfig
 
 
-class LabServerApp(ServerApp):
+class LabServerApp(ExtensionAppJinjaMixin, LabConfig, ExtensionApp):
+    """A Lab Server Application that runs out-of-the-box"""
+    name = "jupyterlab_server"
+    extension_url = "/lab"
+    app_name = "JupyterLab Server Application"
+    app_version = __version__
+
+    @property
+    def app_namespace(self):
+        return self.name
 
     default_url = Unicode('/lab',
                           help='The default URL to redirect to from `/`')
 
-    lab_config = LabConfig()
+    # Should your extension expose other server extensions when launched directly?
+    load_other_extensions = True
 
     blacklist_uris = Unicode('', config=True,
         help="A list of comma-separated URIs to get the blacklist")
@@ -30,9 +46,16 @@ class LabServerApp(ServerApp):
         help="The optional kwargs to use for the listings HTTP requests \
             as described on https://2.python-requests.org/en/v2.7.0/api/#requests.request")
 
-    def start(self):
-        add_handlers(self.web_app, self.lab_config)
-        super().start()
+    def initialize_templates(self):
+        self.static_paths = [self.static_dir]
+        self.template_paths = [self.templates_dir]
+
+    def initialize_settings(self):
+        settings = self.serverapp.web_app.settings
+        # By default, make terminals available.
+        settings.setdefault('terminals_available', True)
 
+    def initialize_handlers(self):
+        add_handlers(self.handlers, self)
 
-main = LabServerApp.launch_instance
+main = launch_new_instance = LabServerApp.launch_instance