From 3412a90212f04aec89220b0ba7abe19832f8e169 Mon Sep 17 00:00:00 2001
From: silverwind <me@silverwind.io>
Date: Mon, 11 May 2026 00:30:40 +0200
Subject: [PATCH 1/3] Drain undici dispatcher before exit to fix Node 24
 Windows race
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Aborting the prewarms isn't enough — the keep-alive socket pool still
has idle handles that race during natural shutdown on Windows + Node 24
(nodejs/node#56645). Closing the global dispatcher drains the pool
cleanly, eliminating the race.

Node exposes the global dispatcher via Symbol.for("undici.globalDispatcher.1");
this is the same mechanism undici itself uses to share it with the
runtime.

Co-Authored-By: Claude (Opus 4.7) <noreply@anthropic.com>
---
 index.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/index.ts b/index.ts
index 63b0430..3d33feb 100755
--- a/index.ts
+++ b/index.ts
@@ -80,6 +80,10 @@ async function end(err?: Error | void, exitCode?: number): Promise<void> {
 
   prewarmAbort.abort();
   await Promise.all(prewarms);
+  // Drain undici's keep-alive pool to avoid a libuv async/close race during
+  // shutdown on Windows + Node 24 (nodejs/node#56645).
+  const dispatcher = (globalThis as any)[Symbol.for("undici.globalDispatcher.1")];
+  if (dispatcher?.close) await dispatcher.close();
   process.exitCode = exitCode ?? (err ? 1 : 0);
 }
 

From df09be76969acc079d3cd86059466394aaacabe1 Mon Sep 17 00:00:00 2001
From: silverwind <me@silverwind.io>
Date: Mon, 11 May 2026 00:34:36 +0200
Subject: [PATCH 2/3] Restore Windows exit delay and setBlocking workarounds

The Symbol-based dispatcher.close workaround relied on a private Node API
and didn't reliably fix the Node 24 Windows flake. Restoring the
straightforward 100ms-on-Windows delay and the stdio setBlocking
workaround is honest about the upstream Node bug and avoids reaching
into internals.

Refs https://github.com/nodejs/node/issues/56645

Co-Authored-By: Claude (Opus 4.7) <noreply@anthropic.com>
---
 index.ts | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/index.ts b/index.ts
index 3d33feb..1d6c6b7 100755
--- a/index.ts
+++ b/index.ts
@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-import {argv, cwd, stdout} from "node:process";
+import {argv, cwd, stdout, stderr, exit, platform, versions} from "node:process";
 import {stripVTControlCharacters, styleText, parseArgs} from "node:util";
 import {dirname, isAbsolute, resolve} from "node:path";
 import {statSync} from "node:fs";
@@ -12,9 +12,7 @@ import {prewarmOrigins} from "./utils/prewarm.ts";
 import type {Arg} from "./config.ts";
 import type {Output, UpdatesOptions} from "./api.ts";
 
-const prewarmAbort = new AbortController();
-const prewarms = prewarmOrigins(cwd(), argv.slice(2))
-  .map(url => fetch(url, {method: "HEAD", signal: prewarmAbort.signal}).catch(() => {}));
+for (const url of prewarmOrigins(cwd(), argv.slice(2))) fetch(url, {method: "HEAD"}).catch(() => {});
 
 const result = parseArgs({
   strict: false,
@@ -78,16 +76,19 @@ async function end(err?: Error | void, exitCode?: number): Promise<void> {
     }
   }
 
-  prewarmAbort.abort();
-  await Promise.all(prewarms);
-  // Drain undici's keep-alive pool to avoid a libuv async/close race during
-  // shutdown on Windows + Node 24 (nodejs/node#56645).
-  const dispatcher = (globalThis as any)[Symbol.for("undici.globalDispatcher.1")];
-  if (dispatcher?.close) await dispatcher.close();
-  process.exitCode = exitCode ?? (err ? 1 : 0);
+  // https://github.com/nodejs/node/issues/56645
+  if (platform === "win32" && Number(versions?.node?.split(".")[0]) >= 23) {
+    await new Promise(resolve => setTimeout(resolve, 100));
+  }
+
+  exit(exitCode ?? (err ? 1 : 0));
 }
 
 async function main(): Promise<void> {
+  for (const stream of [stdout, stderr]) {
+    (stream as any)?._handle?.setBlocking?.(true);
+  }
+
   const maxSockets = 25;
 
   if (args.help) {
@@ -137,13 +138,11 @@ async function main(): Promise<void> {
     $ updates -f docker-compose.yml
 `);
     await end();
-    return;
   }
 
   if (args.version) {
     console.info(packageVersion);
     await end();
-    return;
   }
 
   const fileSet = parseMixedArg(args.file);

From b8b28d83498743a34ee24d5e6c0f553cd1cd228c Mon Sep 17 00:00:00 2001
From: silverwind <me@silverwind.io>
Date: Mon, 11 May 2026 00:35:08 +0200
Subject: [PATCH 3/3] Bump Windows exit delay from 100ms to 200ms

Refs https://github.com/nodejs/node/issues/56645

Co-Authored-By: Claude (Opus 4.7) <noreply@anthropic.com>
---
 index.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/index.ts b/index.ts
index 1d6c6b7..ff87223 100755
--- a/index.ts
+++ b/index.ts
@@ -78,7 +78,7 @@ async function end(err?: Error | void, exitCode?: number): Promise<void> {
 
   // https://github.com/nodejs/node/issues/56645
   if (platform === "win32" && Number(versions?.node?.split(".")[0]) >= 23) {
-    await new Promise(resolve => setTimeout(resolve, 100));
+    await new Promise(resolve => setTimeout(resolve, 200));
   }
 
   exit(exitCode ?? (err ? 1 : 0));