/usr/lib/python3/dist-packages/oneconf/packagesethandler.py is in python3-oneconf 0.3.7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 | # Copyright (C) 2010 Canonical
#
# Authors:
# Didier Roche <didrocks@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.
#
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
import hashlib
import json
import logging
import os
from pprint import pformat
LOG = logging.getLogger(__name__)
from oneconf.hosts import Hosts
from oneconf.distributor import get_distro
from oneconf.paths import PACKAGE_LIST_PREFIX
from oneconf import utils
class PackageSetInitError(Exception):
"""An error occurred, preventing the package set to initialize."""
class PackageSetHandler(object):
"""
Direct access to database for getting and updating the list
"""
def __init__(self, hosts=None):
self.hosts = hosts
if not hosts:
self.hosts = Hosts()
self.distro = get_distro()
if not self.distro:
raise PackageSetInitError(
"Can't initialize PackageSetHandler: no valid distro provided")
self.last_storage_sync = None
# create cache for storage package list, indexed by hostid
self.package_list = {}
def update(self):
'''update the store with package list'''
hostid = self.hosts.current_host['hostid']
LOG.debug("Updating package list")
newpkg_list = self.distro.compute_local_packagelist()
LOG.debug("Creating the checksum")
# We need to get a reliable checksum for the dictionary in
# newpkg_list. Dictionary order is unpredictable, so to get a
# reproducible checksum, we need a predictable string representation
# of the dictionary. pprint.pformat() seems to give us the best
# option here since it guarantees that dictionary keys are sorted.
# hashlib works on bytes only though, so assume utf-8.
hash_input = pformat(newpkg_list).encode('utf-8')
checksum = hashlib.sha224(hash_input).hexdigest()
LOG.debug("Package list need refresh")
self.package_list[hostid] = {'valid': True, 'package_list': newpkg_list}
utils.save_json_file_update(os.path.join(self.hosts.get_currenthost_dir(), '%s_%s' % (PACKAGE_LIST_PREFIX, hostid)),
self.package_list[hostid]['package_list'])
if self.hosts.current_host['packages_checksum'] != checksum:
self.hosts.current_host['packages_checksum'] = checksum
self.hosts.save_current_host()
LOG.debug("Update done")
def get_packages(self, hostid=None, hostname=None, only_manual=False):
'''get all installed packages from the storage'''
hostid = self.hosts.get_hostid_from_context(hostid, hostname)
LOG.debug ("Request for package list for %s with only manual packages reduced scope to: %s", hostid, only_manual)
package_list = self._get_installed_packages(hostid)
if only_manual:
package_list = [
package_elem for package_elem in package_list
if not package_list[package_elem]["auto"]]
return package_list
def _get_installed_packages(self, hostid):
'''get installed packages from the storage or cache
Return: uptodate package_list'''
need_reload = False
try:
if self.package_list[hostid]['valid']:
LOG.debug("Hit cache for package list")
package_list = self.package_list[hostid]['package_list']
else:
need_reload = True
except KeyError:
need_reload = True
if need_reload:
self.package_list[hostid] = {
'valid': True,
'package_list': self._get_packagelist_from_store(hostid),
}
return self.package_list[hostid]['package_list']
def diff(self, distant_hostid=None, distant_hostname=None):
"""get a diff from current package state from another host
This function can be use to make a diff between all packages installed
on both computer, use_cache
Return: (packages_to_install (packages in distant_hostid not in local_hostid),
packages_to_remove (packages in local hostid not in distant_hostid))
"""
distant_hostid = self.hosts.get_hostid_from_context(
distant_hostid, distant_hostname)
LOG.debug("Collecting all installed packages on this system")
local_package_list = set(
self.get_packages(self.hosts.current_host['hostid'], False))
LOG.debug("Collecting all installed packages on the other system")
distant_package_list = set(self.get_packages(distant_hostid, False))
LOG.debug("Comparing")
packages_to_install = [
x for x in sorted(distant_package_list)
if x not in local_package_list]
packages_to_remove = [
x for x in sorted(local_package_list)
if x not in distant_package_list]
# for Dbus which doesn't like empty list
if not packages_to_install:
packages_to_install = ''
if not packages_to_remove:
packages_to_remove = ''
return packages_to_install, packages_to_remove
def _get_packagelist_from_store(self, hostid):
'''load package list for every computer in cache'''
LOG.debug('get package list from store for hostid: %s' % hostid)
# load current content in cache
try:
with open(os.path.join(self.hosts.get_currenthost_dir(), '%s_%s' % (PACKAGE_LIST_PREFIX, hostid)), 'r') as f:
# can be none in corrupted null file
pkg_list = json.load(f)
except (IOError, ValueError):
LOG.warning ("no valid package list stored for hostid: %s" % hostid)
pkg_list = None
if pkg_list is None:
pkg_list = {}
# there is no way that no package is installed in current host
# At least, there is oneconf ;) Ask for refresh
if hostid == self.hosts.current_host['hostid']:
LOG.debug ("Processing first update for current host")
self.update()
pkg_list = self.package_list[hostid]['package_list']
return pkg_list
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