From 9cec273d84a5fd310fe54be7b7a858f0d5aeb53a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E8=83=A1=E7=8E=AE=E6=96=87?= <huweiwen.hww@alibaba-inc.com>
Date: Wed, 11 Dec 2024 00:33:59 +0800
Subject: [PATCH] Set GOMODCACHE to avoid re-download toolchain

If we don't set this, k/k build script will set GOMODCACHE different from default, and re-download the toolchain (or fail to build for Kubernetes <= 1.29).
---
 prow.sh | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/prow.sh b/prow.sh
index 7124b401..67d8dfb2 100755
--- a/prow.sh
+++ b/prow.sh
@@ -441,7 +441,8 @@ run_with_go () {
     else
         version=local
     fi
-    GOTOOLCHAIN=$version run "$@"
+    # Set GOMODCACHE to make sure Kubernetes does not need to download again.
+    GOTOOLCHAIN=$version GOMODCACHE="$(go env GOMODCACHE)" run "$@"
 }
 
 # Ensure that we have the desired version of kind.