From 158a72e2191a0d39fef2f57ff4c53dff92debed7 Mon Sep 17 00:00:00 2001
From: JeelyWu <127880572+JeelyWu@users.noreply.github.com>
Date: Wed, 3 Jun 2026 11:27:32 +0800
Subject: [PATCH] fix(install): prevent unbound variable error on EXIT trap

When install.sh is piped to bash (curl | bash), the EXIT trap
fires after main() returns. Since tmpdir was declared local,
it was destroyed when main() exited, causing 'tmpdir: unbound variable'
under set -u. The binary installed successfully, but the script
exited with code 1.

Fix by making tmpdir a global variable so the trap can reference
it after main() returns.
---
 scripts/install.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/scripts/install.sh b/scripts/install.sh
index e9eb3d0..a2218dc 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -113,7 +113,8 @@ main() {
   local checksum_name
   local release_base
   local install_dir
-  local tmpdir
+  # tmpdir is intentionally not local so the EXIT trap can reference it after main returns.
+  tmpdir=""
   local archive_path
   local checksum_path
   local checksum_entry