feat: Make task runners work with n8n from npm (no-changelog) (#11015)

packages/@n8n/task-runner-node-js/package.json

@@ -3,7 +3,7 @@
   "private": true,
   "version": "0.1.0",
   "description": "",
-  "main": "dist/index.js",
+  "main": "dist/start.js",
   "scripts": {
     "start": "node dist/start.js",
     "dev": "pnpm build && pnpm start",
@@ -23,9 +23,9 @@
     "package.json",
     "tsconfig.json"
   ],
-  "main": "dist/index.js",
-  "module": "src/index.ts",
-  "types": "dist/index.d.ts",
+  "main": "dist/start.js",
+  "module": "src/start.ts",
+  "types": "dist/start.d.ts",
   "packageManager": "pnpm@9.6.0",
   "devDependencies": {
     "@n8n_io/eslint-config": "^0.0.2",

packages/@n8n/task-runner-node-js/src/start.ts

@@ -1,5 +1,4 @@
 import * as a from 'node:assert/strict';
-
 import { JsTaskRunner } from './code';
 import { authenticate } from './authenticator';
 
@@ -7,28 +6,39 @@ let _runner: JsTaskRunner;
 
 type Config = {
 	n8nUri: string;
-	authToken: string;
+	authToken?: string;
+	grantToken?: string;
 };
 
 function readAndParseConfig(): Config {
 	const authToken = process.env.N8N_RUNNERS_AUTH_TOKEN;
-	a.ok(authToken, 'Missing task runner auth token. Use N8N_RUNNERS_AUTH_TOKEN to configure it');
+	const grantToken = process.env.N8N_RUNNERS_GRANT_TOKEN;
+	if (!authToken && !grantToken) {
+		throw new Error(
+			'Missing task runner authentication. Use either N8N_RUNNERS_AUTH_TOKEN or N8N_RUNNERS_GRANT_TOKEN to configure it',
+		);
+	}
 
 	return {
 		n8nUri: process.env.N8N_RUNNERS_N8N_URI ?? 'localhost:5678',
 		authToken,
+		grantToken,
 	};
 }
 
 void (async function start() {
 	const config = readAndParseConfig();
 
-	const grantToken = await authenticate({
-		authToken: config.authToken,
-		n8nUri: config.n8nUri,
-	});
+	let grantToken = config.grantToken;
+	if (!grantToken) {
+		a.ok(config.authToken);
+
+		grantToken = await authenticate({
+			authToken: config.authToken,
+			n8nUri: config.n8nUri,
+		});
+	}
 
 	const wsUrl = `ws://${config.n8nUri}/rest/runners/_ws`;
-
 	_runner = new JsTaskRunner('javascript', wsUrl, grantToken, 5);
 })();