fix(core): exit on sigint

.env

@@ -1 +1 @@
-NX_ISOLATE_PLUGINS=true
+# NX_ISOLATE_PLUGINS=true

packages/nx/src/project-graph/plugins/isolation/plugin-pool.ts

@@ -1,5 +1,6 @@
 import { ChildProcess, spawn } from 'child_process';
 import path = require('path');
+import { Socket, connect } from 'net';
 
 import { PluginConfiguration } from '../../../config/nx-json';
 
@@ -9,13 +10,13 @@ import { PluginConfiguration } from '../../../config/nx-json';
 import { LoadedNxPlugin, nxPluginCache } from '../internal-api';
 import { getPluginOsSocketPath } from '../../../daemon/socket-utils';
 import { consumeMessagesFromSocket } from '../../../utils/consume-messages-from-socket';
+import { signalToCode } from '../../../utils/exit-codes';
 
 import {
   consumeMessage,
   isPluginWorkerResult,
   sendMessageOverSocket,
 } from './messaging';
-import { Socket, connect } from 'net';
 
 const cleanupFunctions = new Set<() => void>();
 
@@ -247,17 +248,20 @@ function createWorkerExitHandler(
 }
 
 let cleanedUp = false;
-const exitHandler = () => {
-  if (cleanedUp) return;
+const exitHandler = (code) => () => {
+  if (cleanedUp) {
+    process.exit(code);
+  }
   for (const fn of cleanupFunctions) {
     fn();
   }
   cleanedUp = true;
+  process.exit(code);
 };
 
-process.on('exit', exitHandler);
-process.on('SIGINT', exitHandler);
-process.on('SIGTERM', exitHandler);
+process.on('exit', (code) => exitHandler(code)());
+process.on('SIGINT', exitHandler(signalToCode('SIGINT')));
+process.on('SIGTERM', exitHandler(signalToCode('SIGTERM')));
 
 function registerPendingPromise(
   tx: string,