From d35dd230198277f93f561b249263b14b347f9e1a Mon Sep 17 00:00:00 2001
From: David Tomaschik <david@systemoverlord.com>
Date: Sun, 7 Feb 2016 16:05:21 -0800
Subject: [PATCH] Only try to change shell on interactive sessions.

---
 install.sh | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/install.sh b/install.sh
index 7352879..82005bb 100755
--- a/install.sh
+++ b/install.sh
@@ -5,9 +5,11 @@ set errexit
 
 function prerequisites {
   if which zsh > /dev/null ; then
-    if [[ `getent passwd $USER | cut -d: -f7` != */zsh ]] ; then
-      echo 'Enter password to change shell.' >&2
-      chsh -s `which zsh`
+    if [[ $- == *i* ]] ; then
+      if [[ `getent passwd $USER | cut -d: -f7` != */zsh ]] ; then
+        echo 'Enter password to change shell.' >&2
+        chsh -s `which zsh`
+      fi
     fi
     install_git https://github.com/robbyrussell/oh-my-zsh.git $HOME/.oh-my-zsh
   else