From ff861ca314ba1f0ce7593b666a2d946b04ff6620 Mon Sep 17 00:00:00 2001
From: Casper <casperklein@users.noreply.github.com>
Date: Sat, 22 Feb 2020 00:52:32 +0100
Subject: [PATCH] Allow calling setup.sh from other scripts

Calling setup.sh from other scripts fails, for example when adding a new mailbox:

    the input device is not a TTY
---
 setup.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/setup.sh b/setup.sh
index 8f94135d..84a5d4fd 100755
--- a/setup.sh
+++ b/setup.sh
@@ -127,7 +127,7 @@ _docker_image_exists() {
   fi
 }
 
-if [ -t 1 ] ; then
+if tty -s ; then
   USE_TTY="-ti"
 fi