From c98447ba9e4b9242c65f815429d311c2f215533a Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Sun, 14 Dec 2014 07:01:22 +0100
Subject: [PATCH] check for lockfile before running

---
 s/preview | 1 +
 1 file changed, 1 insertion(+)

diff --git a/s/preview b/s/preview
index 369c7557c..3e5180bfb 100755
--- a/s/preview
+++ b/s/preview
@@ -69,6 +69,7 @@ function run() {
 echo "testing turn $turn of game $game"
 assert_dir $TESTROOT
 cd $TESTROOT
+[ ! -e execute.lock ] || abort "lockfile prevents running game $game"
 [ -d data ] || mkdir data
 assert_dir data
 assert_files $LIVE/orders.$turn $LIVE/data/$turn.dat