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# dpkg_status.py - compact the dpkg status file
# Copyright (C) 2009 Canonical, Ltd.
#
# Author: Michael Vogt <mvo@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/>.
from apt_pkg import TagFile
import subprocess
import logging
import computerjanitor
_ = computerjanitor.setup_gettext()
class DpkgStatusCruft(computerjanitor.Cruft):
def __init__(self, n_items):
self.n_items = n_items
def get_prefix(self):
return "dpkg-status"
def get_prefix_description(self): # pragma: no cover
return _("%i obsolete entries in the status file") % self.n_items
def get_shortname(self):
return _("Obsolete entries in dpkg status")
def get_description(self): # pragma: no cover
return _("Obsolete dpkg status entries")
def cleanup(self): # pragma: no cover
logging.debug("calling dpkg --forget-old-unavail")
res = subprocess.call(["dpkg","--forget-old-unavail"])
logging.debug("dpkg --forget-old-unavail returned %s" % res)
class DpkgStatusPlugin(computerjanitor.Plugin):
def __init__(self, fname="/var/lib/dpkg/status"):
self.status = fname
self.condition = ["PostCleanup"]
def get_cruft(self):
n_cruft = 0
tagf = TagFile(open(self.status))
while tagf.step():
statusline = tagf.section.get("Status")
(want, flag, status) = statusline.split()
if want == "purge" and flag == "ok" and status == "not-installed":
n_cruft += 1
logging.debug("DpkgStatusPlugin found %s cruft items" % n_cruft)
if n_cruft:
return [DpkgStatusCruft(n_cruft)]
return [] # pragma: no cover