From e681b170eb67141dad3a1430ab7f23641f15fb6f Mon Sep 17 00:00:00 2001
From: Jan Safranek <jsafrane@redhat.com>
Date: Wed, 21 Feb 2024 18:16:04 +0100
Subject: [PATCH] Use .go-version to get Kubernetes go version

Kubernetes publishes .go-version since v1.23. Use it to get Kubernete's go
version instead of parsing a shell script.
---
 prow.sh | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/prow.sh b/prow.sh
index a27c71f3d..0af3fdcd8 100755
--- a/prow.sh
+++ b/prow.sh
@@ -564,7 +564,15 @@ go_version_for_kubernetes () (
     local version="$2"
     local go_version
 
-    # We use the minimal Go version specified for each K8S release (= minimum_go_version in hack/lib/golang.sh).
+    # Try to get the version for .go-version
+    go_version="$( cat "$path/.go-version" )"
+    if [ "$go_version" ]; then
+        echo "$go_version"
+        return
+    fi
+
+    # Fall back to hack/lib/golang.sh parsing.
+    # This is necessary in v1.26.0 and older Kubernetes releases that do not have .go-version.
     # More recent versions might also work, but we don't want to count on that.
     go_version="$(grep minimum_go_version= "$path/hack/lib/golang.sh" | sed -e 's/.*=go//')"
     if ! [ "$go_version" ]; then