From 5b3afef0872cf9d16a6e8f690dd3a299b6e3c064 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jozef=20Steinh=C3=BCbl?= <xhyrom.hyro@gmail.com>
Date: Thu, 10 Jul 2025 20:15:27 +0200
Subject: [PATCH] feat: fallback arm64 to x64 architecture for win32 platform

closes https://github.com/oven-sh/setup-bun/issues/130
---
 src/action.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/action.ts b/src/action.ts
index b3c26bf..2b6d8c1 100644
--- a/src/action.ts
+++ b/src/action.ts
@@ -163,7 +163,11 @@ function getDownloadUrl(options: Input): string {
   const { version, os, arch, avx2, profile } = options;
   const eversion = encodeURIComponent(version ?? "latest");
   const eos = encodeURIComponent(os ?? process.platform);
-  const earch = encodeURIComponent(arch ?? process.arch);
+  const earch = encodeURIComponent(
+    (os ?? process.platform) === "win32" && (arch ?? process.arch) === "arm64"
+      ? "x64"
+      : (arch ?? process.arch),
+  ); // Temporary workaround for absence of arm64 builds on Windows (#130)
   const eavx2 = encodeURIComponent(avx2 ?? true);
   const eprofile = encodeURIComponent(profile ?? false);
   const { href } = new URL(