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#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (C) 2010, 2012 Canonical Ltd.
# Author: Martin Pitt <martin.pitt@ubuntu.com>
# 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; version 3 of the License.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Do a size comparison of the files on two ISOs. This can be used to find out
# which packages were added, removed, and significantly changed in size between
# two releases or daily builds. Note that this only really works for
# alternates, since desktop CDs by and large just have one big squashfs image.
from __future__ import print_function
import subprocess
import sys
def deb_size_map(iso_path):
map = {} # package -> (version, size)
isoinfo = subprocess.Popen(
['isoinfo', '-lR', '-i', iso_path],
stdout=subprocess.PIPE, universal_newlines=True)
out = isoinfo.communicate()[0]
assert isoinfo.returncode == 0
for l in out.splitlines():
l = l.strip()
if not l.endswith('.deb'):
continue
fields = l.split()
size = int(fields[4])
fname = fields[11]
(pkg, version, _) = fname.split('_')
map[pkg] = (version, size)
return map
#
# main
#
if len(sys.argv) != 3:
print('Usage: %s <old iso> <new iso>' % sys.argv[0], file=sys.stderr)
sys.exit(1)
old_map = deb_size_map(sys.argv[1])
new_map = deb_size_map(sys.argv[2])
print('== Removed packages ==')
sum = 0
for p, (v, s) in old_map.iteritems():
if p not in new_map:
print('%s (%.1f MB)' % (p, s / 1000000.))
sum += s
print('TOTAL: -%.1f MB' % (sum / 1000000.))
sum = 0
print('\n== Added packages ==')
for p, (v, s) in new_map.iteritems():
if p not in old_map:
print('%s (%.1f MB)' % (p, s / 1000000.))
sum += s
print('TOTAL: +%.1f MB' % (sum / 1000000.))
print('\n== Changed packages ==')
sum = 0
for p, (v, s) in old_map.iteritems():
if p not in new_map:
continue
new_s = new_map[p][1]
sum += new_s - s
# only show differences > 100 kB to filter out noise
if new_s - s > 100000:
print('%s (Δ %.1f MB - %s: %.1f MB %s: %.1f MB)' % (
p, (new_s - s) / 1000000., v, s / 1000000., new_map[p][0],
new_s / 1000000.))
print('TOTAL difference: %.1f MB' % (sum / 1000000.))
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