Make the service worker optional

Author: martinRenou

README.md

@@ -13,7 +13,7 @@ The [xeus-python](https://github.com/jupyter-xeus/xeus-python) Python kernel for
 
 ## Requirements
 
-- JupyterLite >= 0.1.0b12
+- JupyterLite >= 0.1.0b16
 
 ## Install
 

docs/environment.yml

@@ -7,8 +7,7 @@ dependencies:
   - mamba
   - pydata-sphinx-theme
   - pip
-
   - pip:
-      - jupyterlite
-      - jupyterlite-sphinx
-      - jupyterlite-xeus-python>=0.5.0
+    - jupyterlite>=0.1.0b16
+    - jupyterlite-sphinx
+    - jupyterlite-xeus-python>=0.5.0

package.json

@@ -55,8 +55,8 @@
     "watch:labextension": "jupyter labextension watch ."
   },
   "dependencies": {
-    "@jupyterlite/contents": "^0.1.0-beta.12",
-    "@jupyterlite/server": "^0.1.0-beta.12",
+    "@jupyterlite/contents": "^0.1.0-beta.16",
+    "@jupyterlite/server": "^0.1.0-beta.16",
     "comlink": "^4.3.1"
   },
   "devDependencies": {

src/index.ts

@@ -3,11 +3,11 @@
 // Distributed under the terms of the Modified BSD License.
 
 import {
-  IServiceWorkerRegistrationWrapper,
+  IServiceWorkerManager,
   JupyterLiteServer,
-  JupyterLiteServerPlugin
+  JupyterLiteServerPlugin,
 } from '@jupyterlite/server';
-
+import { IBroadcastChannelWrapper } from '@jupyterlite/contents';
 import { IKernel, IKernelSpecs } from '@jupyterlite/kernel';
 
 import { WebWorkerKernel } from './web_worker_kernel';
@@ -18,11 +18,13 @@ import logo64 from '!!file-loader?context=.!../style/logos/python-logo-64x64.png
 const server_kernel: JupyterLiteServerPlugin<void> = {
   id: '@jupyterlite/xeus-python-kernel-extension:kernel',
   autoStart: true,
-  requires: [IKernelSpecs, IServiceWorkerRegistrationWrapper],
+  requires: [IKernelSpecs],
+  optional: [IServiceWorkerManager, IBroadcastChannelWrapper],
   activate: (
     app: JupyterLiteServer,
     kernelspecs: IKernelSpecs,
-    serviceWorkerRegistrationWrapper: IServiceWorkerRegistrationWrapper
+    serviceWorker?: IServiceWorkerManager,
+    broadcastChannel?: IBroadcastChannelWrapper
   ) => {
     kernelspecs.register({
       spec: {
@@ -36,9 +38,17 @@ const server_kernel: JupyterLiteServerPlugin<void> = {
         }
       },
       create: async (options: IKernel.IOptions): Promise<IKernel> => {
+        const mountDrive = !!(serviceWorker?.enabled && broadcastChannel?.enabled);
+
+        if (mountDrive) {
+          console.info('Pyolite contents will be synced with Jupyter Contents');
+        } else {
+          console.warn('Pyolite contents will NOT be synced with Jupyter Contents');
+        }
+
         return new WebWorkerKernel({
           ...options,
-          mountDrive: serviceWorkerRegistrationWrapper.enabled
+          mountDrive
         });
       }
     });