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?? __init__.py(31.37 KB)
?? __pycache__
?? alias.py(6.92 KB)
?? autoremove.py(2.97 KB)
?? check.py(7.06 KB)
?? clean.py(4.36 KB)
?? deplist.py(1.47 KB)
?? distrosync.py(1.91 KB)
?? downgrade.py(2.27 KB)
?? group.py(14.65 KB)
?? history.py(17.54 KB)
?? install.py(7.58 KB)
?? makecache.py(1.86 KB)
?? mark.py(3.45 KB)
?? module.py(16.46 KB)
?? reinstall.py(4.09 KB)
?? remove.py(6.48 KB)
?? repolist.py(12.62 KB)
?? repoquery.py(33.71 KB)
?? search.py(6.16 KB)
?? shell.py(9.61 KB)
?? swap.py(2.36 KB)
?? updateinfo.py(18.55 KB)
?? upgrade.py(4.62 KB)
?? upgrademinimal.py(1.76 KB)

Editing: clean.py

# clean.py
# Clean CLI command.
#
# Copyright (C) 2014-2016 Red Hat, Inc.
#
# This copyrighted material is made available to anyone wishing to use,
# modify, copy, or redistribute it subject to the terms and conditions of
# the GNU General Public License v.2, or (at your option) any later version.
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY expressed or implied, including the implied warranties 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, write to the
# Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.  Any Red Hat trademarks that are incorporated in the
# source code or documentation are not subject to the GNU General Public
# License and may only be used or replicated with the express permission of
# Red Hat, Inc.
#

from __future__ import absolute_import
from __future__ import unicode_literals
from dnf.cli import commands
from dnf.i18n import _, P_
from dnf.yum import misc

import dnf.cli
import dnf.exceptions
import dnf.lock
import dnf.logging
import dnf.repo
import logging
import os
import re
import time

logger = logging.getLogger("dnf")

# Dict mapping cmdline arguments to actual data types to be cleaned up
_CACHE_TYPES = {
    'metadata': ['metadata', 'dbcache', 'expire-cache'],
    'packages': ['packages'],
    'dbcache': ['dbcache'],
    'expire-cache': ['expire-cache'],
    'all': ['metadata', 'packages', 'dbcache'],
}

def _tree(dirpath):
    """Traverse dirpath recursively and yield relative filenames."""
    for root, dirs, files in os.walk(dirpath):
        base = os.path.relpath(root, dirpath)
        for f in files:
            path = os.path.join(base, f)
            yield os.path.normpath(path)

def _filter(files, patterns):
    """Yield those filenames that match any of the patterns."""
    return (f for f in files for p in patterns if re.match(p, f))

def _clean(dirpath, files):
    """Remove the given filenames from dirpath."""
    count = 0
    for f in files:
        path = os.path.join(dirpath, f)
        logger.log(dnf.logging.DDEBUG, _('Removing file %s'), path)
        misc.unlink_f(path)
        count += 1
    return count

def _cached_repos(files):
    """Return the repo IDs that have some cached metadata around."""
    metapat = dnf.repo.CACHE_FILES['metadata']
    matches = (re.match(metapat, f) for f in files)
    return set(m.group('repoid') for m in matches if m)

class CleanCommand(commands.Command):
    """A class containing methods needed by the cli to execute the
    clean command.
    """

aliases = ('clean',)
    summary = _('remove cached data')

@staticmethod
    def set_argparser(parser):
        parser.add_argument('type', nargs='+',
                           choices=_CACHE_TYPES.keys(),
                           help=_('Metadata type to clean'))

def run(self):
        cachedir = self.base.conf.cachedir
        md_lock = dnf.lock.build_metadata_lock(cachedir, True)
        download_lock = dnf.lock.build_download_lock(cachedir, True)
        rpmdb_lock = dnf.lock.build_rpmdb_lock(self.base.conf.persistdir, True)
        while True:
            try:
                with md_lock and download_lock and rpmdb_lock:
                    types = set(t for c in self.opts.type for t in _CACHE_TYPES[c])
                    files = list(_tree(cachedir))
                    logger.debug(_('Cleaning data: ' + ' '.join(types)))

if 'expire-cache' in types:
                        expired = _cached_repos(files)
                        self.base._repo_persistor.expired_to_add.update(expired)
                        types.remove('expire-cache')
                        logger.info(_('Cache was expired'))

patterns = [dnf.repo.CACHE_FILES[t] for t in types]
                    count = _clean(cachedir, _filter(files, patterns))
                    logger.info(P_('%d file removed', '%d files removed', count) % count)
                    return
            except dnf.exceptions.LockError as e:
                if not self.base.conf.exit_on_lock:
                    msg = _('Waiting for process with pid %d to finish.') % (e.pid)
                    logger.info(msg)
                    time.sleep(3)
                else:
                    raise e

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