#!/usr/bin/python -tt
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
# Copyright 2010 Red Hat, Inc
# Written By Seth Vidal - skvidal@fedoraproject.org


import sys
host1 = sys.argv[1]
host2 = sys.argv[2]
if len(sys.argv) != 3:
    print "pkglist compare list1 list2"
    print "Must specify exactly two lists to compare"
    sys.exit(1)

try:
    host1_inst = set(open(host1, 'r').readlines())
    host2_inst = set(open(host2, 'r').readlines())
except (IOError, OSError), msg:
    print "Error: %s" % msg
    sys.exit(1)
host1diff = host1_inst.difference(host2_inst)
host2diff = host2_inst.difference(host1_inst)
print 'Packages on %s not on %s' % (host1, host2)
print ''.join(host1diff)
print 'Packages on %s not on %s' % (host2, host1)
print ''.join(host2diff)