#!/bin/bash
usage()
{
	echo "Usage"
	echo "llxdev-changelog newchangelog oldchangelog"
}
if [ $# -ne 2 ]; then
	usage
	exit 1
fi
NEW=$1
OLD=$2
if [ ! -e "${1}" ]; then 
	echo "El fichero de changelog nuevo no existe"
	exit 1
fi
if [ ! -e "${2}" ]; then 
	echo "El fichero de changelog viejo no existe"
	exit 1
fi

INFO=$(head $2 -n1)
PACKAGE=$(echo $INFO | cut -d " " -f1)
VERSION=$(echo $INFO | cut -d " " -f2 | sed -e "s%^(\(.*\))$%\1%g")
LASTVERSION=''
for newversion in `cat $1 | sed -ne "/^[^[:blank:]]/p" | sed -e "s/.*(\(.*\)).*/\1/g"`; do
	dpkg --compare-versions $newversion gt $VERSION || if [ -z $LASTVERSION ]; then LASTVERSION="$newversion" ;fi
done
sed -i -e "/^[^[:blank:]].*($LASTVERSION)/,\$d" $1
cat $2 >> $1