From 03792718c7fba059ca9a3fb930226a5420544022 Mon Sep 17 00:00:00 2001
From: martinRenou <martin.renou@gmail.com>
Date: Thu, 11 Jan 2024 09:30:11 +0100
Subject: [PATCH] Revert to one plugin per-kernel

---
 src/index.ts  | 62 +++++++++++++++++++++++++++------------------------
 src/worker.ts |  5 ++++-
 2 files changed, 37 insertions(+), 30 deletions(-)

diff --git a/src/index.ts b/src/index.ts
index 9c6ccb0..967e858 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -21,35 +21,39 @@ function getJson(url: string) {
   return JSON.parse(xhr.responseText);
 }
 
-const xeusKernelsPlugin: JupyterLiteServerPlugin<void> = {
-  id: '@jupyterlite/xeus:register-kernels',
-  autoStart: true,
-  requires: [IKernelSpecs],
-  optional: [IServiceWorkerManager, IBroadcastChannelWrapper],
-  activate: (
-    app: JupyterLiteServer,
-    kernelspecs: IKernelSpecs,
-    serviceWorker?: IServiceWorkerManager,
-    broadcastChannel?: IBroadcastChannelWrapper
-  ) => {
-    let kernel_list: string[] = [];
-    try {
-      kernel_list = getJson('xeus/kernels.json');
-    } catch (err) {
-      console.log(`Could not fetch xeus/kernels.json: ${err}`);
-      throw err;
-    }
+let kernel_list: string[] = [];
+try {
+  kernel_list = getJson('xeus/kernels.json');
+} catch (err) {
+  console.log(`Could not fetch xeus/kernels.json: ${err}`);
+  throw err;
+}
 
-    // Fetch kernel spec for each kernel
-    for (const kernel of kernel_list) {
-      const kernelspec = getJson(
-        'xeus/kernels/' + kernel + '/kernel.json'
-      );
+const plugins = kernel_list.map((kernel): JupyterLiteServerPlugin<void> => {
+  return {
+    id: `@jupyterlite/xeus-${kernel}:register`,
+    autoStart: true,
+    requires: [IKernelSpecs],
+    optional: [IServiceWorkerManager, IBroadcastChannelWrapper],
+    activate: (
+      app: JupyterLiteServer,
+      kernelspecs: IKernelSpecs,
+      serviceWorker?: IServiceWorkerManager,
+      broadcastChannel?: IBroadcastChannelWrapper
+    ) => {
+      // Fetch kernel spec
+      const kernelspec = getJson('xeus/kernels/' + kernel + '/kernel.json');
       kernelspec.name = kernel;
       kernelspec.dir = kernel;
       kernelspec.resources = {
-        'logo-32x32': URLExt.join(PageConfig.getBaseUrl(), 'xeus/kernels/' + kernel + '/logo-32x32.png'),
-        'logo-64x64': URLExt.join(PageConfig.getBaseUrl(), 'xeus/kernels/' + kernel + '/logo-64x64.png'),
+        'logo-32x32': URLExt.join(
+          PageConfig.getBaseUrl(),
+          'xeus/kernels/' + kernel + '/logo-32x32.png'
+        ),
+        'logo-64x64': URLExt.join(
+          PageConfig.getBaseUrl(),
+          'xeus/kernels/' + kernel + '/logo-64x64.png'
+        )
       };
 
       kernelspecs.register({
@@ -76,8 +80,8 @@ const xeusKernelsPlugin: JupyterLiteServerPlugin<void> = {
           });
         }
       });
-    };
-  }
-};
+    }
+  };
+});
 
-export default xeusKernelsPlugin;
+export default plugins;
diff --git a/src/worker.ts b/src/worker.ts
index ca84f13..f41f1c0 100644
--- a/src/worker.ts
+++ b/src/worker.ts
@@ -165,7 +165,10 @@ class XeusKernel {
     const dir = this._kernelspec.dir;
 
     // location of the kernel binary on the server
-    const binary_js = URLExt.join(PageConfig.getBaseUrl(), this._kernelspec.argv[0]);
+    const binary_js = URLExt.join(
+      PageConfig.getBaseUrl(),
+      this._kernelspec.argv[0]
+    );
     const binary_wasm = binary_js.replace('.js', '.wasm');
 
     importScripts(binary_js);