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#!/usr/bin/python
# pull-debian-debdiff - find and download a specific version of a Debian
# package and its immediate parent to generate a debdiff.
#
# Copyright (C) 2010-2011, Stefano Rivera <stefanor@ubuntu.com>
# Inspired by a tool of the same name by Kees Cook.
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
# AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
# OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
# PERFORMANCE OF THIS SOFTWARE.
import optparse
import sys
import debian.debian_support
import debian.changelog
from devscripts.logger import Logger
from ubuntutools.archive import DebianSourcePackage, DownloadError
from ubuntutools.config import UDTConfig
def previous_version(package, version, distance):
"Given an (extracted) package, determine the version distance versions ago"
upver = debian.debian_support.Version(version).upstream_version
filename = '%s-%s/debian/changelog' % (package, upver)
changelog_file = open(filename, 'r')
changelog = debian.changelog.Changelog(changelog_file.read())
changelog_file.close()
seen = 0
for entry in changelog:
if entry.distributions == 'UNRELEASED':
continue
if seen == distance:
return entry.version.full_version
seen += 1
return False
def main():
parser = optparse.OptionParser('%prog [options] <package> <version> '
'[distance]')
parser.add_option('-f', '--fetch',
dest='fetch_only', default=False, action='store_true',
help="Only fetch the source packages, don't diff.")
parser.add_option('-d', '--debian-mirror', metavar='DEBIAN_MIRROR',
dest='debian_mirror',
help='Preferred Debian mirror '
'(default: http://ftp.debian.org/debian)')
parser.add_option('-s', '--debsec-mirror', metavar='DEBSEC_MIRROR',
dest='debsec_mirror',
help='Preferred Debian Security mirror '
'(default: http://security.debian.org)')
parser.add_option('--no-conf',
dest='no_conf', default=False, action='store_true',
help="Don't read config files or environment variables")
opts, args = parser.parse_args()
if len(args) < 2:
parser.error('Must specify package and version')
elif len(args) > 3:
parser.error('Too many arguments')
package = args[0]
version = args[1]
distance = int(args[2]) if len(args) > 2 else 1
config = UDTConfig(opts.no_conf)
if opts.debian_mirror is None:
opts.debian_mirror = config.get_value('DEBIAN_MIRROR')
if opts.debsec_mirror is None:
opts.debsec_mirror = config.get_value('DEBSEC_MIRROR')
mirrors = [opts.debsec_mirror, opts.debian_mirror]
Logger.normal('Downloading %s %s', package, version)
newpkg = DebianSourcePackage(package, version, mirrors=mirrors)
try:
newpkg.pull()
except DownloadError, e:
Logger.error('Failed to download: %s', str(e))
sys.exit(1)
newpkg.unpack()
if opts.fetch_only:
sys.exit(0)
oldversion = previous_version(package, version, distance)
if not oldversion:
Logger.error('No previous version could be found')
sys.exit(1)
Logger.normal('Downloading %s %s', package, oldversion)
oldpkg = DebianSourcePackage(package, oldversion, mirrors=mirrors)
try:
oldpkg.pull()
except DownloadError, e:
Logger.error('Failed to download: %s', str(e))
sys.exit(1)
oldpkg.unpack()
print 'file://' + oldpkg.debdiff(newpkg, diffstat=True)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
Logger.normal('User abort.')
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