From 95296bb0c5fade33c6cda7ccc7139a35c2641b3a Mon Sep 17 00:00:00 2001
From: Frederic Crozat <fred@crozat.net>
Date: Tue, 22 Sep 2015 16:46:22 +0200
Subject: [PATCH] also handle missing tput in upgrade script.

---
 tools/upgrade.sh | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tools/upgrade.sh b/tools/upgrade.sh
index 65af6e368..6e9696202 100644
--- a/tools/upgrade.sh
+++ b/tools/upgrade.sh
@@ -1,7 +1,10 @@
 
 # Use colors, but only if connected to a terminal, and that terminal
 # supports them.
-ncolors=$(tput colors)
+tput=$(which tput)
+if [ -n "$tput" ]; then
+    ncolors=$(tput colors)
+fi
 if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then
   RED="$(tput setaf 1)"
   GREEN="$(tput setaf 2)"