#!/bin/bash
#
# Update script
#
# * This script will fetch update scripts from REMOTE_URL
# * Update scripts should be named 0.sh.asc, 1.sh.asc, ...
# * The file LAST in DEST will hold the last script downloaded regardless of the success of execution
 
DEST=/usr/share/heivs/heivsupdate
REMOTE_URL='http://wiki.hevs.ch/uit/index.php5?title=Tools/ddrxupdates/'
REMOTE_URL_END='&action=raw'
mkdir -p $DEST
cd $DEST
 
# The file named LAST will hold the last update number
# Create it if it does not exist
#
if [ ! -e LAST ]
then
	CURRENT=0
	echo -n $CURRENT > LAST
fi
CURRENT=`cat LAST`
 
while [ 1 ]
do
	wget -q "$REMOTE_URL$CURRENT.sh.asc$REMOTE_URL_END" -O $CURRENT.sh.asc
	if [ ! -e $CURRENT.sh.asc ] || [ ! -s  $CURRENT.sh.asc ]
	then	
		echo nothing new
		exit 0
	fi
 
	gpg -q --decrypt --output $CURRENT.sh $CURRENT.sh.asc  &> /dev/null
	if [ $? -ne 0 ]
	then
		echo signature invalid
		echo signature invalid >> $CURRENT.log
	else
		echo signature valid >> $CURRENT.log
		chmod +x $CURRENT.sh
		echo running ./$CURRENT.sh >> $CURRENT.log
		./$CURRENT.sh >> $CURRENT.log
	fi
 
	rm $CURRENT.sh.asc $CURRENT.sh
 
	((CURRENT++))
	echo -n $CURRENT > LAST
done