#!/bin/sh

cmd_install()
{
	local n=`basename $1`
	n=`echo $n | sed "s/_[0-9.-]\+_amd64.deb//"`
	/bin/bash $0 -q $n >/dev/null 2>&1 && {
		fatal "$n is already installed (`/bin/bash $0 -q $n`)"
	}
	cmd_update $1
}

cmd_update()
{
	$dpkg --dry-run -i $1 || fatal "Test-installation failed."
	$dpkg -i $1 || fatal "Installation failed."
}

cmd_erase()
{
	#$dpkg -r $1
	$dpkg --purge $1
}

cmd_query()
{
	[ "$query_cmd" ] && {
		eval cmd_query_\$query_cmd $1
		return $?
	}

	local p=`echo $1 | sed 's/-[0-9.-]\+$//'`
	local v=`echo $1 | sed "s/^$p-*//"`
	local ip=`dpkg-query -W -f '${Package}' $p >/dev/null 2>&1`
	[ $? != 0 -o -z "$ip" ] && exit 1
	local iv=`dpkg-query -W -f '${Version}' $p >/dev/null 2>&1`
	[ "$v" ] && {
		[ "$v" != "$iv" ] && {
			echo "tried $1, installed version is $iv" >&2
			exit 1
		}
	}
	echo $ip-$iv
	return 0
}

usage()
{
	echo "usage: $myname [-h] [... misc rpm options]"
	[ "$1" ] && exit $1

}

fatal()
{
	echo $@ >&2
	exit 1
}

# -- here we go
myname=`basename $0`
dpkg=/usr/bin/dpkg
cmd=""

set -- `getopt hqiUe "$@"`
while [ "$1" != -- ]; do
case $1 in
	-h)
		usage 0
		;;
	-q)
		[ "$cmd" ] && usage 1
		cmd=query
		;;
	-i)
		[ "$cmd" ] && usage 1
		cmd=install
		;;
	-U)
		[ "$cmd" ] && usage 1
		cmd=update
		;;
	-e)
		[ "$cmd" ] && usage 1
		cmd=erase
		;;
	*)
		usage 1
		;;
esac
shift
done
shift

[ $# != 1 ] && usage 1
[ "$cmd" ] || usage 1

eval cmd_\$cmd $1