From 75e619b72421e7330011c8bda5f99af5231a8b7d Mon Sep 17 00:00:00 2001
From: Yannick Eckey <yannick.eckey@googlemail.com>
Date: Thu, 15 Oct 2015 15:37:30 +0200
Subject: [PATCH] Fix install.sh/upgrade.sh for tput-less systems

@fcrozat's original fix assumes `which` not to output anything to STDOUT
in case the command is not found. That is not necessarily true on all
systems. A better solution is to check the return value instead.

Fixes #4376
---
 tools/install.sh | 5 ++---
 tools/upgrade.sh | 3 +--
 2 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/tools/install.sh b/tools/install.sh
index 5633320a8..542bf97c2 100755
--- a/tools/install.sh
+++ b/tools/install.sh
@@ -2,9 +2,8 @@ set -e
 
 # Use colors, but only if connected to a terminal, and that terminal
 # supports them.
-tput=$(which tput)
-if [ -n "$tput" ]; then
-    ncolors=$($tput colors)
+if which tput >/dev/null 2>&1; then
+    ncolors=$(tput colors)
 fi
 if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then
   RED="$(tput setaf 1)"
diff --git a/tools/upgrade.sh b/tools/upgrade.sh
index 6e9696202..fe8fbadca 100644
--- a/tools/upgrade.sh
+++ b/tools/upgrade.sh
@@ -1,8 +1,7 @@
 
 # Use colors, but only if connected to a terminal, and that terminal
 # supports them.
-tput=$(which tput)
-if [ -n "$tput" ]; then
+if which tput >/dev/null 2>&1; then
     ncolors=$(tput colors)
 fi
 if [ -t 1 ] && [ -n "$ncolors" ] && [ "$ncolors" -ge 8 ]; then