~ubuntu-langpack/langpack-o-matic/main

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#!/usr/bin/python
#
# This is part of langpack-o-matic
#
# (C) 2011 Canonical Ltd.
# Author: Martin Pitt <martin.pitt@canonical.com>
#
# Copy all packages from the weekly PPA to -proposed.  This needs
# ~ubuntu-archive privilages.
# Usage: copy-ppa-proposed <release>

import sys
import apt
from launchpadlib.launchpad import Launchpad

if len(sys.argv) != 2:
    sys.stderr.write('Usage: %s <release>\n' % sys.argv[0])
    sys.exit(1)
release = sys.argv[1]

launchpad = Launchpad.login_with('langpack-o-matic', service_root='production')
ubuntu = launchpad.distributions['ubuntu']
archive = ubuntu.getArchive(name='primary')
distro_series = ubuntu.getSeries(name_or_version=release)
langpack_ppa = launchpad.people['ubuntu-langpack'].getPPAByName(name='ppa')

# get current versions in PPA for that series
for pub in langpack_ppa.getPublishedSources(source_name='language-pack-',
        exact_match=False, status='Published', pocket='Release',
        distro_series=distro_series):

    newer = True
    in_ubuntu = False

    # get current versions in Ubuntu
    for ubuntu_pub in archive.getPublishedSources(source_name=pub.source_package_name,
        exact_match=True, status='Published', distro_series=distro_series):
        in_ubuntu = True
        if ubuntu_pub.pocket not in ('Release', 'Proposed', 'Updates', 'Security'):
            # ignore backports
            continue
        if apt.apt_pkg.version_compare(ubuntu_pub.source_package_version,
                pub.source_package_version) >= 0:
            sys.stderr.write('%s already has the same/never version of %s: %s, PPA: %s\n' % (
                ubuntu_pub.pocket, pub.source_package_name, ubuntu_pub.source_package_version, pub.source_package_version))
            newer = False
            break

    if not in_ubuntu:
        sys.stderr.write('%s is not yet in Ubuntu, not copying\n' % pub.source_package_name)
        continue

    if newer:
        print('Copying %s %s from PPA to %s-proposed' % (pub.source_package_name, 
            pub.source_package_version, release))
        try:
            archive.syncSource(from_archive=langpack_ppa, include_binaries=True,
                    source_name=pub.source_package_name, to_series=release,
                    to_pocket='proposed', version=pub.source_package_version)
        except:
            continue