Run the Extension Inside the Worker

[cemalgnlts]

Hi,

I want to run an extension in Worker, what is the right way to do it.

Does using ExtensionHostKind.LocalWebWorker or ExtensionHostKind.LocalProcess make a difference?

[CGNonofr]

Yes, the first one will run in the worker, the other one in the browser directly. The registerExtension parameter allows to force it but it's not mandatory.

Note that for the worker you'll need to provide the worker configuration to the extension service override, and the latter requires to import 'localExtensionHost'

[cemalgnlts]

If you are talking about Worker config, yes.

https://github.com/cemalgnlts/jside/blob/main/src/workspace/init.ts#L87

const fakeWorker = new FakeWorker(new URL(ExtensionHostWorkerUrl, import.meta.url), { type: "module" });

const workerConfig: WorkerConfig = {
  url: fakeWorker.url.toString(),
  options: fakeWorker.options,
};

await initializeServices({
  ...getExtensionsServiceOverride(workerConfig),
// ...

[CGNonofr]

Ok, for the extension to run, it needs an activation event in the manifest

[cemalgnlts]

Great now my worker code works but I can't use import.

[Extension Host] Loading code for extension JSIDE.esbuild failed: Cannot use import statement outside a module

import { window } from "vscode";

window.showInformationMessage("Hello from extension.");

[CGNonofr]

Yes, VSCode extensions are commonjs. If you want ESM you'll need to transpile it

[cemalgnlts]

Now everything works.
Thank you.