fix preview scripts to auto-checkout master

s/cron/previews.sh

@@ -1,9 +1,9 @@
 #!/bin/sh
-
-cd $ERESSEA/git
-s/preview build
-s/preview version
+[ -z $ERESSEA ] && ERESSEA=$HOME/eressea
+SRC=$ERESSEA/git
+$SRC/s/preview build master
+$SRC/s/preview version
 for game in 2 3 4 ; do
-	s/preview -g $game run && \
-	s/preview -g $game send
+	$SRC/s/preview -g $game run && \
+	$SRC/s/preview -g $game send
 done

s/preview

@@ -23,6 +23,7 @@ function build() {
 assert_dir $SOURCE
 cd $SOURCE
 git pull || abort "failed to update source. do you have local changes?"
+[ -z $1 ] || git checkout $1
 s/build || abort "build failed."
 }
 
@@ -87,7 +88,9 @@ zip="$turn-$1.zip"
 zip -q -u $zip $turn-$1.?r
 email=$(grep "faction=$1:" reports.txt | cut -d: -f2 | sed 's/email=//')
 echo "sending reports to $1 / $email"
-cat /dev/null | mutt -F $ERESSEA/etc/muttrc -s "Testauswertung Spiel $game Partei $1" -a $zip -- $email
+info=/dev/null
+[ -e ../email.txt ] && info=../email.txt
+cat $info | mutt -F $ERESSEA/etc/muttrc -s "Testauswertung Spiel $game Partei $1" -a $zip -- $email
 }
 
 game=0
@@ -128,7 +131,8 @@ case "$1" in
   version
   ;;
 "build")
-  build
+  shift
+  build $*
   ;;
 "setup")
   setup