#!/usr/bin/python -O
#
# Copyright 2005 Sven Wegener <swegener@gentoo.org>
# Distributed under the terms of the GNU General Public License v2
#
# $Id: checkunusedlicenses 284 2005-09-07 10:41:17Z sven $
#

import portage, portage_dep, os

dbapi = portage.db['/']['porttree'].dbapi

validlicenses = os.listdir(portage.settings['PORTDIR'] + '/licenses')
usedlicenses = []

for cp in dbapi.cp_all():
	for cpv in dbapi.cp_list(cp):
		for license in portage.flatten(portage_dep.use_reduce(portage_dep.paren_reduce(dbapi.aux_get(cpv, ['LICENSE'])[0]), matchall = True)):
			if license == '||':
				continue
			if license not in usedlicenses:
				usedlicenses.append(license)

for license in validlicenses:
	if license not in usedlicenses:
		print license