can't connect to tsserver

Question

I'm writing a vscode extension that should connect to tsserver in order to provide language support for typescript/javascript.

Here is how i'm doing it (in extension.ts, inside activate):

const serverModule = path.resolve(
  __dirname,
  "..",
  "node_modules",
  "typescript",
  "lib",
  "tsserver.js"
);

const debugOptions = { execArgv: ["--nolazy", "--inspect=6009"] };

const serverOptions: ServerOptions = {
  run: { module: serverModule, transport: TransportKind.ipc },
  debug: {
    module: serverModule,
    transport: TransportKind.ipc,
    options: debugOptions,
  },
};

const clientOptions = {
  documentSelector: [
    {
      scheme: "file",
      language: "typescript",
    },
  ],
};

client = new LanguageClient(
  "server-id",
  "server-name",
  serverOptions,
  clientOptions
);

context.subscriptions.push(client.start());

But when I call client.onReady().then(() => client.sendRequest(...)); the request is not sent. I'm almost sure the problem is that the initialization phase is unsuccessful so the onReady() method is blocking me. How do I get it to work ?

Answer 1

tsserver does not use the language server protocol, it has its own json based protocol. You cannot connect to it using the language server protocol apis