From 0b58ca9176c09196db315dd2ab6e6050e1ae3cf9 Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Sun, 21 Dec 2014 13:41:21 +0100
Subject: [PATCH] try to handle more potential errors

---
 s/preview | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/s/preview b/s/preview
index 461ef09b7..99414fafd 100755
--- a/s/preview
+++ b/s/preview
@@ -22,8 +22,8 @@ exit $2 # otherwise
 function build() {
 assert_dir $SOURCE
 cd $SOURCE
-[ -z $1 ] || ( git checkout $1 && git submodule update )
-git pull || abort "failed to update source. do you have local changes?"
+[ -z $1 ] || git checkout $1
+( git pull && git submodule update ) || abort "failed to update source. do you have local changes?"
 s/build || abort "build failed."
 }