From 7f1c6740f7c82f1ee950990edbad3993dfd26c97 Mon Sep 17 00:00:00 2001
From: Benjamin Elder <bentheelder@google.com>
Date: Tue, 9 Feb 2021 22:40:01 -0800
Subject: [PATCH] suggest homebrew when bash is too old on macOS

---
 hack/lib/util.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/hack/lib/util.sh b/hack/lib/util.sh
index 401ea1a726a..2f35f3cf0cb 100755
--- a/hack/lib/util.sh
+++ b/hack/lib/util.sh
@@ -736,6 +736,9 @@ function kube::util::ensure-bash-version {
   # shellcheck disable=SC2004
   if ((${BASH_VERSINFO[0]}<4)) || ( ((${BASH_VERSINFO[0]}==4)) && ((${BASH_VERSINFO[1]}<2)) ); then
     echo "ERROR: This script requires a minimum bash version of 4.2, but got version of ${BASH_VERSINFO[0]}.${BASH_VERSINFO[1]}"
+    if [ "$(uname)" = 'Darwin' ]; then
+      echo "On macOS with homebrew 'brew install bash' is sufficient."
+    fi
     exit 1
   fi
 }