feat(cli): add `--unstable-node-globals` flag (#26617)

This PR adds a new `--unstable-node-globals` flag to expose Node globals
by default.

Fixes https://github.com/denoland/deno/issues/26611

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

2 files changed, 20 insertions, 6 deletions

diff --git a/runtime/js/90_deno_ns.js b/runtime/js/90_deno_ns.js
index 11f618ce2..079338510 100644
--- a/runtime/js/90_deno_ns.js
+++ b/runtime/js/90_deno_ns.js
@@ -144,12 +144,13 @@ const unstableIds = {
   http: 5,
   kv: 6,
   net: 7,
-  otel: 8,
-  process: 9,
-  temporal: 10,
-  unsafeProto: 11,
-  webgpu: 12,
-  workerOptions: 13,
+  nodeGlobals: 8,
+  otel: 9,
+  process: 10,
+  temporal: 11,
+  unsafeProto: 12,
+  webgpu: 13,
+  workerOptions: 14,
 };
 
 const denoNsUnstableById = { __proto__: null };
diff --git a/runtime/js/98_global_scope_shared.js b/runtime/js/98_global_scope_shared.js
index 7a2723899..f8e76b7ce 100644
--- a/runtime/js/98_global_scope_shared.js
+++ b/runtime/js/98_global_scope_shared.js
@@ -32,6 +32,8 @@ import { DOMException } from "ext:deno_web/01_dom_exception.js";
 import * as abortSignal from "ext:deno_web/03_abort_signal.js";
 import * as imageData from "ext:deno_web/16_image_data.js";
 import process from "node:process";
+import Buffer from "node:buffer";
+import { clearImmediate, setImmediate } from "node:timers";
 import { loadWebGPU } from "ext:deno_webgpu/00_init.js";
 import * as webgpuSurface from "ext:deno_webgpu/02_surface.js";
 import { unstableIds } from "ext:runtime/90_deno_ns.js";
@@ -300,4 +302,15 @@ unstableForWindowOrWorkerGlobalScope[unstableIds.net] = {
 
 unstableForWindowOrWorkerGlobalScope[unstableIds.webgpu] = {};
 
+unstableForWindowOrWorkerGlobalScope[unstableIds.nodeGlobals] = {
+  Buffer: core.propWritable(Buffer),
+  setImmediate: core.propWritable(setImmediate),
+  clearImmediate: core.propWritable(clearImmediate),
+  global: {
+    enumerable: true,
+    configurable: true,
+    get: () => globalThis,
+  },
+};
+
 export { unstableForWindowOrWorkerGlobalScope, windowOrWorkerGlobalScope };