From e5d53769df025be750b53924957161f0f840a34b Mon Sep 17 00:00:00 2001
From: Enno Rehling <enno.rehling@gmail.com>
Date: Thu, 11 Dec 2014 12:19:04 +0100
Subject: [PATCH] lock files to prevent accidents. preview will only run if the
 turn worked out. cannot accidentally run in the game directory.

---
 process/cron/run-eressea |  6 ++++++
 scripts/run-turn.lua     | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/process/cron/run-eressea b/process/cron/run-eressea
index cc33f8f1e..21de5ee09 100755
--- a/process/cron/run-eressea
+++ b/process/cron/run-eressea
@@ -13,7 +13,12 @@ if [ -d $REPORTS ]; then
 fi
 mkdir $REPORTS
 $BIN/backup-eressea $GAME
+if [ -d test ]; then
+  touch test/execute.lock
+fi
+rm -f execute.lock
 $BIN/run-turn $GAME
+touch execute.lock
 if [ ! -s $ERESSEA/game-$GAME/orders.$TURN ]; then
   echo "server did not create orders for turn $TURN in game $GAME"
   exit 2
@@ -31,3 +36,4 @@ $BIN/compress.sh $GAME $TURN
 $BIN/sendreports.sh $GAME
 $BIN/backup-eressea $GAME
 [ $GAME -lt 4 ] && $BIN/send-summary $GAME
+rm -f test/execute.lock
diff --git a/scripts/run-turn.lua b/scripts/run-turn.lua
index f938c8514..46095f216 100644
--- a/scripts/run-turn.lua
+++ b/scripts/run-turn.lua
@@ -182,6 +182,16 @@ function run_turn(rules)
   return result
 end
 
+function file_exists(name)
+    local f=io.open(name,"r")
+    if f~=nil then io.close(f) return true else return false end
+end
+
+if file_exists('execute.lock') then
+    eressea.log.error("Lockfile exists, aborting.")
+    assert(false)
+end
+
 local path = 'scripts'
 if config.install then
     path = config.install .. '/' .. path