From 15c19384b71d04c03f6083f14470f7c82e47e143 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ma=C3=ABl=20Valais?= <mael@vls.dev>
Date: Tue, 29 Mar 2022 11:23:34 +0200
Subject: [PATCH] make: prevent "warning: undefined variable 'CI'"
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Signed-off-by: Maël Valais <mael@vls.dev>
---
 make/tools.mk | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/make/tools.mk b/make/tools.mk
index 7d406f6d5..4c323db49 100644
--- a/make/tools.mk
+++ b/make/tools.mk
@@ -113,7 +113,10 @@ unvendor-go: bin/tools/go
 #
 # Details on how "bin/downloaded" gets cached are available in the
 # description of the PR https://github.com/jetstack/testing/pull/651.
-ifeq ($(CI),)
+#
+# We use "printenv CI" instead of just "ifeq ($(CI),)" because otherwise we
+# would get "warning: undefined variable 'CI'".
+ifeq ($(shell printenv CI),)
 LN := ln -f -s
 else
 LN := cp -f -r