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#!/usr/bin/python2.7
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# -*- coding: utf-8 -*-
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# Copyright (C) 2010, 2012 Canonical Ltd.
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# Author: Martin Pitt <martin.pitt@ubuntu.com>
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; version 3 of the License.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Do a size comparison of the files on two ISOs. This can be used to find out
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# which packages were added, removed, and significantly changed in size between
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# two releases or daily builds. Note that this only really works for
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# alternates, since desktop CDs by and large just have one big squashfs image.
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from __future__ import print_function
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import subprocess
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import sys
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def deb_size_map(iso_path):
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map = {} # package -> (version, size)
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isoinfo = subprocess.Popen(
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['isoinfo', '-lR', '-i', iso_path],
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stdout=subprocess.PIPE, universal_newlines=True)
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out = isoinfo.communicate()[0]
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assert isoinfo.returncode == 0
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for l in out.splitlines():
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l = l.strip()
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if not l.endswith('.deb'):
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continue
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fields = l.split()
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size = int(fields[4])
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fname = fields[11]
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(pkg, version, _) = fname.split('_')
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map[pkg] = (version, size)
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return map
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#
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# main
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#
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if len(sys.argv) != 3:
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print('Usage: %s <old iso> <new iso>' % sys.argv[0], file=sys.stderr)
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sys.exit(1)
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old_map = deb_size_map(sys.argv[1])
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new_map = deb_size_map(sys.argv[2])
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print('== Removed packages ==')
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sum = 0
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for p, (v, s) in old_map.iteritems():
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if p not in new_map:
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print('%s (%.1f MB)' % (p, s / 1000000.))
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sum += s
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print('TOTAL: -%.1f MB' % (sum / 1000000.))
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sum = 0
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print('\n== Added packages ==')
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for p, (v, s) in new_map.iteritems():
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if p not in old_map:
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print('%s (%.1f MB)' % (p, s / 1000000.))
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sum += s
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print('TOTAL: +%.1f MB' % (sum / 1000000.))
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print('\n== Changed packages ==')
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sum = 0
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for p, (v, s) in old_map.iteritems():
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if p not in new_map:
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continue
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new_s = new_map[p][1]
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sum += new_s - s
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# only show differences > 100 kB to filter out noise
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if new_s - s > 100000:
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print('%s (Δ %.1f MB - %s: %.1f MB %s: %.1f MB)' % (
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p, (new_s - s) / 1000000., v, s / 1000000., new_map[p][0],
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new_s / 1000000.))
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print('TOTAL difference: %.1f MB' % (sum / 1000000.))
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