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>

cli/schemas/config-file.v1.json

@@ -534,6 +534,7 @@
           "http",
           "kv",
           "net",
+          "node-globals",
           "sloppy-imports",
           "temporal",
           "unsafe-proto",

runtime/fmt_errors.rs

@@ -339,28 +339,40 @@ fn get_suggestions_for_terminal_errors(e: &JsError) -> Vec<FixSuggestion> {
         FixSuggestion::info(cstr!(
           "<u>Buffer</> is not available in the global scope in Deno."
         )),
-        FixSuggestion::hint(cstr!("Import it explicitly with <u>import { Buffer } from \"node:buffer\";</>.")),
+        FixSuggestion::hint_multiline(&[
+          cstr!("Import it explicitly with <u>import { Buffer } from \"node:buffer\";</>,"),
+          cstr!("or run again with <u>--unstable-node-globals</> flag to add this global."),
+        ]),
       ];
     } else if msg.contains("clearImmediate is not defined") {
       return vec![
         FixSuggestion::info(cstr!(
           "<u>clearImmediate</> is not available in the global scope in Deno."
         )),
-        FixSuggestion::hint(cstr!("Import it explicitly with <u>import { clearImmediate } from \"node:timers\";</>.")),
+        FixSuggestion::hint_multiline(&[
+          cstr!("Import it explicitly with <u>import { clearImmediate } from \"node:timers\";</>,"),
+          cstr!("or run again with <u>--unstable-node-globals</> flag to add this global."),
+        ]),
       ];
     } else if msg.contains("setImmediate is not defined") {
       return vec![
         FixSuggestion::info(cstr!(
           "<u>setImmediate</> is not available in the global scope in Deno."
         )),
-        FixSuggestion::hint(cstr!("Import it explicitly with <u>import { setImmediate } from \"node:timers\";</>.")),
+        FixSuggestion::hint_multiline(
+          &[cstr!("Import it explicitly with <u>import { setImmediate } from \"node:timers\";</>,"),
+          cstr!("or run again with <u>--unstable-node-globals</> flag to add this global."),
+        ]),
       ];
     } else if msg.contains("global is not defined") {
       return vec![
         FixSuggestion::info(cstr!(
           "<u>global</> is not available in the global scope in Deno."
         )),
-        FixSuggestion::hint(cstr!("Use <u>globalThis</> instead, or assign <u>globalThis.global = globalThis</>.")),
+        FixSuggestion::hint_multiline(&[
+          cstr!("Use <u>globalThis</> instead, or assign <u>globalThis.global = globalThis</>,"),
+          cstr!("or run again with <u>--unstable-node-globals</> flag to add this global."),
+        ]),
       ];
     } else if msg.contains("openKv is not a function") {
       return vec![

runtime/js/90_deno_ns.js

@@ -144,12 +144,13 @@ const unstableIds = {
   http: 5,
   kv: 6,
   net: 7,
-  otel: 8,
+  nodeGlobals: 8,
-  process: 9,
+  otel: 9,
-  temporal: 10,
+  process: 10,
-  unsafeProto: 11,
+  temporal: 11,
-  webgpu: 12,
+  unsafeProto: 12,
-  workerOptions: 13,
+  webgpu: 13,
+  workerOptions: 14,
 };
 
 const denoNsUnstableById = { __proto__: null };

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 };

runtime/lib.rs

@@ -99,24 +99,30 @@ pub static UNSTABLE_GRANULAR_FLAGS: &[UnstableGranularFlag] = &[
     show_in_help: true,
     id: 7,
   },
+  UnstableGranularFlag {
+    name: "node-globals",
+    help_text: "Expose Node globals everywhere",
+    show_in_help: true,
+    id: 8,
+  },
   UnstableGranularFlag {
     name: "otel",
     help_text: "Enable unstable OpenTelemetry features",
     show_in_help: false,
-    id: 8,
+    id: 9,
   },
   // TODO(bartlomieju): consider removing it
   UnstableGranularFlag {
     name: ops::process::UNSTABLE_FEATURE_NAME,
     help_text: "Enable unstable process APIs",
     show_in_help: false,
-    id: 9,
+    id: 10,
   },
   UnstableGranularFlag {
     name: "temporal",
     help_text: "Enable unstable Temporal API",
     show_in_help: true,
-    id: 10,
+    id: 11,
   },
   UnstableGranularFlag {
     name: "unsafe-proto",
@@ -124,19 +130,19 @@ pub static UNSTABLE_GRANULAR_FLAGS: &[UnstableGranularFlag] = &[
     show_in_help: true,
     // This number is used directly in the JS code. Search
     // for "unstableIds" to see where it's used.
-    id: 11,
+    id: 12,
   },
   UnstableGranularFlag {
     name: deno_webgpu::UNSTABLE_FEATURE_NAME,
     help_text: "Enable unstable `WebGPU` APIs",
     show_in_help: true,
-    id: 12,
+    id: 13,
   },
   UnstableGranularFlag {
     name: ops::worker_host::UNSTABLE_FEATURE_NAME,
     help_text: "Enable unstable Web Worker APIs",
     show_in_help: true,
-    id: 13,
+    id: 14,
   },
 ];
 

tests/specs/lint/node_globals_no_duplicate_imports/main.out

@@ -4,4 +4,5 @@ const _foo = setImmediate;
     at [WILDCARD]main.ts:3:14
 
     info: setImmediate is not available in the global scope in Deno.
-    hint: Import it explicitly with import { setImmediate } from "node:timers";.
+    hint: Import it explicitly with import { setImmediate } from "node:timers";,
+          or run again with --unstable-node-globals flag to add this global.

tests/specs/run/node_globals_hints/buffer.out

@@ -4,4 +4,5 @@ Buffer;
     at [WILDCARD]buffer.js:1:1
 
     info: Buffer is not available in the global scope in Deno.
-    hint: Import it explicitly with import { Buffer } from "node:buffer";.
+    hint: Import it explicitly with import { Buffer } from "node:buffer";,
+          or run again with --unstable-node-globals flag to add this global.

tests/specs/run/node_globals_hints/clear_immediate.out

@@ -4,4 +4,5 @@ clearImmediate;
     at [WILDCARD]clear_immediate.js:1:1
 
     info: clearImmediate is not available in the global scope in Deno.
-    hint: Import it explicitly with import { clearImmediate } from "node:timers";.
+    hint: Import it explicitly with import { clearImmediate } from "node:timers";,
+          or run again with --unstable-node-globals flag to add this global.

tests/specs/run/node_globals_hints/global.out

@@ -4,4 +4,5 @@ global;
     at [WILDCARD]global.js:1:1
 
     info: global is not available in the global scope in Deno.
-    hint: Use globalThis instead, or assign globalThis.global = globalThis.
+    hint: Use globalThis instead, or assign globalThis.global = globalThis,
+          or run again with --unstable-node-globals flag to add this global.

tests/specs/run/node_globals_hints/set_immediate.out

@@ -4,4 +4,5 @@ setImmediate;
     at [WILDCARD]set_immediate.js:1:1
 
     info: setImmediate is not available in the global scope in Deno.
-    hint: Import it explicitly with import { setImmediate } from "node:timers";.
+    hint: Import it explicitly with import { setImmediate } from "node:timers";,
+          or run again with --unstable-node-globals flag to add this global.

tests/specs/run/unstable/__test__.jsonc

@@ -20,6 +20,11 @@
       "exitCode": 1,
       "output": "kv.out"
     },
+    "node_globals": {
+      "args": "run --unstable-node-globals node_globals.ts",
+      "exitCode": 0,
+      "output": "node_globals.out"
+    },
     "temporal": {
       "args": "run temporal.ts",
       "exitCode": 1,

tests/specs/run/unstable/node_globals.out

@@ -0,0 +1,4 @@
+global: true
+Buffer: true
+setImmediate: true
+clearImmediate: true

tests/specs/run/unstable/node_globals.ts

@@ -0,0 +1,7 @@
+import * as nodeBuffer from "node:buffer";
+import * as nodeTimers from "node:timers";
+
+console.log(`global: ${globalThis === global}`);
+console.log(`Buffer: ${Buffer === nodeBuffer.default}`);
+console.log(`setImmediate: ${setImmediate === nodeTimers.setImmediate}`);
+console.log(`clearImmediate: ${clearImmediate === nodeTimers.clearImmediate}`);