Current File : //lib/python3/dist-packages/DistUpgrade/DistUpgradeCache.py
# DistUpgradeCache.py
#
# Copyright (c) 2004-2008 Canonical
#
# Author: Michael Vogt <michael.vogt@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; either version 2 of the
# License, or (at your option) any later version.
#
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
# USA
import apt
import apt_pkg
import glob
import locale
import os
import re
import logging
import time
import datetime
import threading
import configparser
from subprocess import Popen, PIPE
from .DistUpgradeGettext import gettext as _
from .DistUpgradeGettext import ngettext
from .utils import inside_chroot
class CacheException(Exception):
pass
class CacheExceptionLockingFailed(CacheException):
pass
class CacheExceptionDpkgInterrupted(CacheException):
pass
def estimate_kernel_initrd_size_in_boot():
"""estimate the amount of space used by the kernel and initramfs in /boot,
including a safety margin
"""
kernel = 0
initrd = 0
kver = os.uname()[2]
for f in glob.glob("/boot/*%s*" % kver):
if f == '/boot/initrd.img-%s' % kver:
initrd += os.path.getsize(f)
# don't include in the estimate any files that are left behind by
# an interrupted package manager run
elif (f.find('initrd.img') >= 0 or f.find('.bak') >= 0
or f.find('.dpkg-') >= 0):
continue
else:
kernel += os.path.getsize(f)
if kernel == 0:
logging.warning(
"estimate_kernel_initrd_size_in_boot() returned '0' for kernel?")
kernel = 16*1024*1024
if initrd == 0:
logging.warning(
"estimate_kernel_initrd_size_in_boot() returned '0' for initrd?")
initrd = 175*1024*1024
# add small safety buffer
kernel += 1*1024*1024
# safety buffer as a percentage of the existing initrd's size
initrd_buffer = 1*1024*1024
if initrd * 0.05 > initrd_buffer:
initrd_buffer = initrd * 0.05
initrd += initrd_buffer
return kernel,initrd
KERNEL_SIZE, INITRD_SIZE = estimate_kernel_initrd_size_in_boot()
class FreeSpaceRequired(object):
""" FreeSpaceRequired object:
This exposes:
- the total size required (size_total)
- the dir that requires the space (dir)
- the additional space that is needed (size_needed)
"""
def __init__(self, size_total, dir, size_needed):
self.size_total = size_total
self.dir = dir
self.size_needed = size_needed
def __str__(self):
return "FreeSpaceRequired Object: Dir: %s size_total: %s size_needed: %s" % (self.dir, self.size_total, self.size_needed)
class NotEnoughFreeSpaceError(CacheException):
"""
Exception if there is not enough free space for this operation
"""
def __init__(self, free_space_required_list):
self.free_space_required_list = free_space_required_list
class MyCache(apt.Cache):
ReInstReq = 1
HoldReInstReq = 3
# init
def __init__(self, config, view, quirks, progress=None, lock=True):
self.to_install = []
self.to_remove = []
self.view = view
self.quirks = quirks
self.lock = False
self.partialUpgrade = False
self.config = config
self.metapkgs = self.config.getlist("Distro", "MetaPkgs")
# acquire lock
self._listsLock = -1
if lock:
try:
apt_pkg.pkgsystem_lock()
self.lock_lists_dir()
self.lock = True
except SystemError as e:
# checking for this is ok, its not translatable
if "dpkg --configure -a" in str(e):
raise CacheExceptionDpkgInterrupted(e)
raise CacheExceptionLockingFailed(e)
# Do not create the cache until we know it is not locked
apt.Cache.__init__(self, progress)
# a list of regexp that are not allowed to be removed
self.removal_denylist = config.getListFromFile("Distro", "RemovalDenylistFile")
# the linux metapackage should not be removed
self.linux_metapackage = self.quirks._get_linux_metapackage(self, False)
self.uname = Popen(["uname", "-r"], stdout=PIPE,
universal_newlines=True).communicate()[0].strip()
self._initAptLog()
# from hardy on we use recommends by default, so for the
# transition to the new dist we need to enable them now
if (config.get("Sources", "From") == "hardy" and
not "RELEASE_UPGRADE_NO_RECOMMENDS" in os.environ):
apt_pkg.config.set("APT::Install-Recommends", "true")
apt_pkg.config.set("APT::AutoRemove::SuggestsImportant", "false")
def _apply_dselect_upgrade(self):
""" honor the dselect install state """
for pkg in self:
if pkg.is_installed:
continue
if pkg._pkg.selected_state == apt_pkg.SELSTATE_INSTALL:
# upgrade() will take care of this
pkg.mark_install(auto_inst=False, auto_fix=False)
@property
def req_reinstall_pkgs(self):
" return the packages not downloadable packages in reqreinst state "
reqreinst = set()
for pkg in self:
if ((not pkg.candidate or not pkg.candidate.downloadable)
and
(pkg._pkg.inst_state == self.ReInstReq or
pkg._pkg.inst_state == self.HoldReInstReq)):
reqreinst.add(pkg.name)
return reqreinst
def fix_req_reinst(self, view):
" check for reqreinst state and offer to fix it "
reqreinst = self.req_reinstall_pkgs
if len(reqreinst) > 0:
header = ngettext("Remove package in bad state",
"Remove packages in bad state",
len(reqreinst))
summary = ngettext("The package '%s' is in an inconsistent "
"state and needs to be reinstalled, but "
"no archive can be found for it. "
"Do you want to remove this package "
"now to continue?",
"The packages '%s' are in an inconsistent "
"state and need to be reinstalled, but "
"no archives can be found for them. Do you "
"want to remove these packages now to "
"continue?",
len(reqreinst)) % ", ".join(reqreinst)
if view.askYesNoQuestion(header, summary):
self.release_lock()
cmd = ["/usr/bin/dpkg", "--remove", "--force-remove-reinstreq"] + list(reqreinst)
view.getTerminal().call(cmd)
self.get_lock()
return True
return False
# logging stuff
def _initAptLog(self):
" init logging, create log file"
logdir = self.config.getWithDefault("Files", "LogDir",
"/var/log/dist-upgrade")
if not os.path.exists(logdir):
os.makedirs(logdir)
apt_pkg.config.set("Dir::Log", logdir)
apt_pkg.config.set("Dir::Log::Terminal", "apt-term.log")
self.logfd = os.open(os.path.join(logdir, "apt.log"),
os.O_RDWR | os.O_CREAT | os.O_APPEND, 0o644)
now = datetime.datetime.now()
header = "Log time: %s\n" % now
os.write(self.logfd, header.encode("utf-8"))
# turn on debugging in the cache
apt_pkg.config.set("Debug::pkgProblemResolver", "true")
apt_pkg.config.set("Debug::pkgDepCache::Marker", "true")
apt_pkg.config.set("Debug::pkgDepCache::AutoInstall", "true")
def _startAptResolverLog(self):
if hasattr(self, "old_stdout"):
os.close(self.old_stdout)
os.close(self.old_stderr)
self.old_stdout = os.dup(1)
self.old_stderr = os.dup(2)
os.dup2(self.logfd, 1)
os.dup2(self.logfd, 2)
def _stopAptResolverLog(self):
os.fsync(1)
os.fsync(2)
os.dup2(self.old_stdout, 1)
os.dup2(self.old_stderr, 2)
# use this decorator instead of the _start/_stop stuff directly
# FIXME: this should probably be a decorator class where all
# logging is moved into?
def withResolverLog(f):
" decorator to ensure that the apt output is logged "
def wrapper(*args, **kwargs):
args[0]._startAptResolverLog()
res = f(*args, **kwargs)
args[0]._stopAptResolverLog()
return res
return wrapper
# properties
@property
def required_download(self):
""" get the size of the packages that are required to download """
pm = apt_pkg.PackageManager(self._depcache)
fetcher = apt_pkg.Acquire()
pm.get_archives(fetcher, self._list, self._records)
return fetcher.fetch_needed
@property
def additional_required_space(self):
""" get the size of the additional required space on the fs """
return self._depcache.usr_size
@property
def additional_required_space_for_snaps(self):
""" get the extra size needed to install the snap replacements """
try:
# update-manager uses DistUpgradeCache.MyCache as the base class
# of its own MyCache version - but without actually calling our
# constructor at all. This causes that the MyCache version from
# update-manager has no self.quirks attribute while still calling
# our default version of checkFreeSpace(). Since extra_snap_space
# is only used on dist-upgrades, let's just not care and return 0
# in this weird, undocumented case.
return self.quirks.extra_snap_space
except AttributeError:
return 0
@property
def is_broken(self):
""" is the cache broken """
return self._depcache.broken_count > 0
# methods
def lock_lists_dir(self):
name = apt_pkg.config.find_dir("Dir::State::Lists") + "lock"
self._listsLock = apt_pkg.get_lock(name)
if self._listsLock < 0:
e = "Can not lock '%s' " % name
raise CacheExceptionLockingFailed(e)
def unlock_lists_dir(self):
if self._listsLock > 0:
os.close(self._listsLock)
self._listsLock = -1
def update(self, fprogress=None):
"""
our own update implementation is required because we keep the lists
dir lock
"""
self.unlock_lists_dir()
res = apt.Cache.update(self, fprogress)
self.lock_lists_dir()
if fprogress and fprogress.release_file_download_error:
# FIXME: not ideal error message, but we just reuse a
# existing one here to avoid a new string
raise IOError(_("The server may be overloaded"))
if res == False:
raise IOError("apt.cache.update() returned False, but did not raise exception?!?")
def commit(self, fprogress, iprogress):
logging.info("cache.commit()")
if self.lock:
self.release_lock()
apt.Cache.commit(self, fprogress, iprogress)
def release_lock(self, pkgSystemOnly=True):
if self.lock:
try:
apt_pkg.pkgsystem_unlock()
self.lock = False
except SystemError as e:
logging.debug("failed to SystemUnLock() (%s) " % e)
def get_lock(self, pkgSystemOnly=True):
if not self.lock:
try:
apt_pkg.pkgsystem_lock()
self.lock = True
except SystemError as e:
logging.debug("failed to SystemLock() (%s) " % e)
def downloadable(self, pkg, useCandidate=True):
" check if the given pkg can be downloaded "
if useCandidate:
ver = self._depcache.get_candidate_ver(pkg._pkg)
else:
ver = pkg._pkg.current_ver
if ver == None:
logging.warning("no version information for '%s' (useCandidate=%s)" % (pkg.name, useCandidate))
return False
return ver.downloadable
def pkg_auto_removable(self, pkg):
""" check if the pkg is auto-removable """
return (pkg.is_installed and
self._depcache.is_garbage(pkg._pkg))
def fix_broken(self):
""" try to fix broken dependencies on the system, may throw
SystemError when it can't"""
return self._depcache.fix_broken()
def create_snapshot(self):
""" create a snapshot of the current changes """
self.to_install = []
self.to_remove = []
for pkg in self.get_changes():
if pkg.marked_install or pkg.marked_upgrade:
self.to_install.append(pkg.name)
if pkg.marked_delete:
self.to_remove.append(pkg.name)
def clear(self):
self._depcache.init()
def restore_snapshot(self):
""" restore a snapshot """
actiongroup = apt_pkg.ActionGroup(self._depcache)
# just make pyflakes shut up, later we need to use
# with self.actiongroup():
actiongroup
self.clear()
for name in self.to_remove:
pkg = self[name]
pkg.mark_delete()
for name in self.to_install:
pkg = self[name]
pkg.mark_install(auto_fix=False, auto_inst=False)
def need_server_mode(self):
"""
This checks if we run on a desktop or a server install.
A server install has more freedoms, for a desktop install
we force a desktop meta package to be install on the upgrade.
We look for a installed desktop meta pkg and for key
dependencies, if none of those are installed we assume
server mode
"""
#logging.debug("need_server_mode() run")
# check for the MetaPkgs (e.g. ubuntu-desktop)
metapkgs = self.config.getlist("Distro", "MetaPkgs")
for key in metapkgs:
# if it is installed we are done
if key in self and self[key].is_installed:
logging.debug("need_server_mode(): run in 'desktop' mode, (because of pkg '%s')" % key)
return False
# if it is not installed, but its key depends are installed
# we are done too (we auto-select the package later)
deps_found = True
for pkg in self.config.getlist(key, "KeyDependencies"):
deps_found &= pkg in self and self[pkg].is_installed
if deps_found:
logging.debug("need_server_mode(): run in 'desktop' mode, (because of key deps for '%s')" % key)
return False
logging.debug("need_server_mode(): can not find a desktop meta package or key deps, running in server mode")
return True
def coherence_check(self, view):
""" check if the cache is ok and if the required metapkgs
are installed
"""
if self.is_broken:
try:
logging.debug("Have broken pkgs, trying to fix them")
self.fix_broken()
except SystemError:
view.error(_("Broken packages"),
_("Your system contains broken packages "
"that couldn't be fixed with this "
"software. "
"Please fix them first using synaptic or "
"apt-get before proceeding."))
return False
return True
def mark_install(self, pkg, reason="", **flags):
logging.debug("Installing '%s' (%s)" % (pkg, reason))
if pkg in self:
self[pkg].mark_install(**flags)
if not (self[pkg].marked_install or self[pkg].marked_upgrade):
logging.error("Installing/upgrading '%s' failed" % pkg)
#raise SystemError("Installing '%s' failed" % pkg)
return False
return True
def mark_upgrade(self, pkg, reason=""):
logging.debug("Upgrading '%s' (%s)" % (pkg, reason))
if pkg in self and self[pkg].is_installed:
self[pkg].mark_upgrade()
if not self[pkg].marked_upgrade:
logging.error("Upgrading '%s' failed" % pkg)
return False
return True
def mark_remove(self, pkg, reason="", **flags):
logging.debug("Removing '%s' (%s)" % (pkg, reason))
if pkg in self:
self[pkg].mark_delete(**flags)
def mark_purge(self, pkg, reason=""):
logging.debug("Purging '%s' (%s)" % (pkg, reason))
if pkg in self:
self._depcache.mark_delete(self[pkg]._pkg, True)
def _keep_installed(self, pkgname, reason):
if (pkgname in self
and self[pkgname].is_installed
and self[pkgname].marked_delete):
self.mark_install(pkgname, reason)
def keep_installed_rule(self):
""" run after the dist-upgrade to ensure that certain
packages are kept installed """
# first the global list
for pkgname in self.config.getlist("Distro", "KeepInstalledPkgs"):
self._keep_installed(pkgname, "Distro KeepInstalledPkgs rule")
# the the per-metapkg rules
for key in self.metapkgs:
if key in self and (self[key].is_installed or
self[key].marked_install):
for pkgname in self.config.getlist(key, "KeepInstalledPkgs"):
self._keep_installed(pkgname, "%s KeepInstalledPkgs rule" % key)
# only enforce section if we have a network. Otherwise we run
# into CD upgrade issues for installed language packs etc
if self.config.get("Options", "withNetwork") == "True":
logging.debug("Running KeepInstalledSection rules")
# now the KeepInstalledSection code
for section in self.config.getlist("Distro", "KeepInstalledSection"):
for pkg in self:
if (pkg.candidate and pkg.candidate.downloadable
and pkg.marked_delete
and pkg.candidate.section == section):
self._keep_installed(pkg.name, "Distro KeepInstalledSection rule: %s" % section)
for key in self.metapkgs:
if key in self and (self[key].is_installed or
self[key].marked_install):
for section in self.config.getlist(key, "KeepInstalledSection"):
for pkg in self:
if (pkg.candidate and pkg.candidate.downloadable
and pkg.marked_delete and
pkg.candidate.section == section):
self._keep_installed(pkg.name, "%s KeepInstalledSection rule: %s" % (key, section))
def pre_upgrade_rule(self):
" run before the upgrade was done in the cache "
# run the quirks handlers
if not self.partialUpgrade:
self.quirks.run("PreDistUpgradeCache")
def post_upgrade_rule(self):
" run after the upgrade was done in the cache "
for (rule, action) in [("Install", self.mark_install),
("Upgrade", self.mark_upgrade),
("Remove", self.mark_remove),
("Purge", self.mark_purge)]:
# first the global list
for pkg in self.config.getlist("Distro", "PostUpgrade%s" % rule):
action(pkg, "Distro PostUpgrade%s rule" % rule)
for key in self.metapkgs:
if key in self and (self[key].is_installed or
self[key].marked_install):
for pkg in self.config.getlist(key, "PostUpgrade%s" % rule):
action(pkg, "%s PostUpgrade%s rule" % (key, rule))
# run the quirks handlers
if not self.partialUpgrade:
self.quirks.run("PostDistUpgradeCache")
def checkForNvidia(self):
"""
this checks for nvidia hardware and checks what driver is needed
"""
logging.debug("nvidiaUpdate()")
# if the free drivers would give us a equally hard time, we would
# never be able to release
try:
from NvidiaDetector.nvidiadetector import NvidiaDetection
except (ImportError, SyntaxError) as e:
# SyntaxError is temporary until the port of NvidiaDetector to
# Python 3 is in the archive.
logging.error("NvidiaDetector can not be imported %s" % e)
return False
try:
# get new detection module and use the modalises files
# from within the release-upgrader
nv = NvidiaDetection(obsolete="./ubuntu-drivers-obsolete.pkgs")
#nv = NvidiaDetection()
# check if a binary driver is installed now
for oldDriver in nv.oldPackages:
if oldDriver in self and self[oldDriver].is_installed:
self.mark_remove(oldDriver, "old nvidia driver")
break
else:
logging.info("no old nvidia driver installed, installing no new")
return False
# check which one to use
driver = nv.selectDriver()
logging.debug("nv.selectDriver() returned '%s'" % driver)
if not driver in self:
logging.warning("no '%s' found" % driver)
return False
if not (self[driver].marked_install or self[driver].marked_upgrade):
self[driver].mark_install()
logging.info("installing %s as suggested by NvidiaDetector" % driver)
return True
except Exception as e:
logging.error("NvidiaDetection returned a error: %s" % e)
return False
def _has_kernel_headers_installed(self):
for pkg in self:
if (pkg.name.startswith("linux-headers-") and
pkg.is_installed):
return True
return False
def checkForKernel(self):
""" check for the running kernel and try to ensure that we have
an updated version
"""
logging.debug("Kernel uname: '%s' " % self.uname)
try:
(version, build, flavour) = self.uname.split("-")
except Exception as e:
logging.warning("Can't parse kernel uname: '%s' (self compiled?)" % e)
return False
# now check if we have a SMP system
dmesg = Popen(["dmesg"], stdout=PIPE).communicate()[0]
if b"WARNING: NR_CPUS limit" in dmesg:
logging.debug("UP kernel on SMP system!?!")
return True
def checkPriority(self):
# tuple of priorities we require to be installed
need = ('required', )
# stuff that its ok not to have
removeEssentialOk = self.config.getlist("Distro", "RemoveEssentialOk")
# check now
for pkg in self:
# WORKAROUND bug on the CD/python-apt #253255
ver = pkg._pcache._depcache.get_candidate_ver(pkg._pkg)
if ver and ver.priority == 0:
logging.error("Package %s has no priority set" % pkg.name)
continue
if (pkg.candidate and pkg.candidate.downloadable and
not (pkg.is_installed or pkg.marked_install) and
not pkg.name in removeEssentialOk and
# ignore multiarch priority required packages
not ":" in pkg.name and
pkg.candidate.priority in need):
self.mark_install(pkg.name, "priority in required set '%s' but not scheduled for install" % need)
# FIXME: make this a decorator (just like the withResolverLog())
def updateGUI(self, view, lock):
i = 0
while lock.locked():
if i % 15 == 0:
view.pulseProgress()
view.processEvents()
time.sleep(0.02)
i += 1
view.pulseProgress(finished=True)
view.processEvents()
@withResolverLog
def distUpgrade(self, view, serverMode, partialUpgrade):
# keep the GUI alive
lock = threading.Lock()
lock.acquire()
t = threading.Thread(target=self.updateGUI, args=(self.view, lock,))
t.start()
try:
# mvo: disabled as it casues to many errornous installs
#self._apply_dselect_upgrade()
# run PreDistUpgradeCache quirks
self.pre_upgrade_rule()
# upgrade (and make sure this way that the cache is ok)
self.upgrade(True)
# check that everything in priority required is installed
self.checkPriority()
# see if our KeepInstalled rules are honored
self.keep_installed_rule()
# check if we got a new kernel (if we are not inside a
# chroot)
if inside_chroot():
logging.warning("skipping kernel checks because we run inside a chroot")
else:
self.checkForKernel()
# check for nvidia stuff
self.checkForNvidia()
# and if we have some special rules
self.post_upgrade_rule()
# install missing meta-packages (if not in server upgrade mode)
self._keepBaseMetaPkgsInstalled(view)
if not serverMode:
# if this fails, a system error is raised
self._installMetaPkgs(view)
# see if it all makes sense, if not this function raises
self._verifyChanges()
if self.is_broken:
raise SystemError(_("Broken packages after upgrade: %s") % ", ".join(p.name for p in self if p.is_inst_broken or p.is_now_broken))
except SystemError as e:
# the most likely problem is the 3rd party pkgs so don't address
# foreignPkgs and devRelease being True
details = _("An unresolvable problem occurred while "
"calculating the upgrade.\n\n ")
if self.config.get("Options", "foreignPkgs") == "True":
details += _("This was likely caused by:\n"
" * Unofficial software packages not provided by Ubuntu\n"
"Please use the tool 'ppa-purge' from the ppa-purge \n"
"package to remove software from a Launchpad PPA and \n"
"try the upgrade again.\n"
"\n")
elif self.config.get("Options", "foreignPkgs") == "False" and \
self.config.get("Options", "devRelease") == "True":
details += _("This was caused by:\n"
" * Upgrading to a pre-release version of Ubuntu\n"
"This is most likely a transient problem, \n"
"please try again later.\n")
# we never have partialUpgrades (including removes) on a stable system
# with only ubuntu sources so we do not recommend reporting a bug
if partialUpgrade:
details += _("This is most likely a transient problem, "
"please try again later.")
else:
details += _("If none of this applies, then please report this bug using "
"the command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. ")
details += _("If you want to investigate this yourself the log files in "
"'/var/log/dist-upgrade' will contain details about the upgrade. "
"Specifically, look at 'main.log' and 'apt.log'.")
# make the error text available again on stdout for the
# text frontend
self._stopAptResolverLog()
view.error(_("Could not calculate the upgrade"), details)
# may contain utf-8 (LP: #1310053)
error_msg = str(e)
logging.error("Dist-upgrade failed: '%s'", error_msg)
# start the resolver log again because this is run with
# the withResolverLog decorator
self._startAptResolverLog()
return False
finally:
# wait for the gui-update thread to exit
lock.release()
t.join()
# check the trust of the packages that are going to change
untrusted = []
downgrade = []
for pkg in self.get_changes():
if pkg.marked_delete:
continue
# special case because of a bug in pkg.candidate.origins
if pkg.marked_downgrade:
downgrade.append(pkg.name)
for ver in pkg._pkg.version_list:
# version is lower than installed one
if apt_pkg.version_compare(
ver.ver_str, pkg.installed.version) < 0:
for (verFileIter, index) in ver.file_list:
indexfile = pkg._pcache._list.find_index(verFileIter)
if indexfile and not indexfile.is_trusted:
untrusted.append(pkg.name)
break
continue
origins = pkg.candidate.origins
trusted = False
for origin in origins:
#print(origin)
trusted |= origin.trusted
if not trusted:
untrusted.append(pkg.name)
# check if the user overwrote the unauthenticated warning
try:
b = self.config.getboolean("Distro", "AllowUnauthenticated")
if b:
logging.warning("AllowUnauthenticated set!")
return True
except configparser.NoOptionError:
pass
if len(downgrade) > 0:
downgrade.sort()
logging.error("Packages to downgrade found: '%s'" %
" ".join(downgrade))
if len(untrusted) > 0:
untrusted.sort()
logging.error("Unauthenticated packages found: '%s'" %
" ".join(untrusted))
# FIXME: maybe ask a question here? instead of failing?
self._stopAptResolverLog()
view.error(_("Error authenticating some packages"),
_("It was not possible to authenticate some "
"packages. This may be a transient network problem. "
"You may want to try again later. See below for a "
"list of unauthenticated packages."),
"\n".join(untrusted))
# start the resolver log again because this is run with
# the withResolverLog decorator
self._startAptResolverLog()
return False
return True
def _verifyChanges(self):
""" this function tests if the current changes don't violate
our constraints (deny listed removals etc)
"""
main_arch = apt_pkg.config.find("APT::Architecture")
removeEssentialOk = self.config.getlist("Distro", "RemoveEssentialOk")
# check changes
for pkg in self.get_changes():
if pkg.marked_delete and self._inRemovalDenylist(pkg.name):
logging.debug("The package '%s' is marked for removal but it's in the removal deny list", pkg.name)
raise SystemError(_("The package '%s' is marked for removal but it is in the removal deny list.") % pkg.name)
if pkg.marked_delete and (
pkg._pkg.essential == True and
pkg.installed.architecture in (main_arch, "all") and
not pkg.name in removeEssentialOk):
logging.debug("The package '%s' is marked for removal but it's an ESSENTIAL package", pkg.name)
raise SystemError(_("The essential package '%s' is marked for removal.") % pkg.name)
# check bad-versions deny list
badVersions = self.config.getlist("Distro", "BadVersions")
for bv in badVersions:
(pkgname, ver) = bv.split("_")
if (pkgname in self and self[pkgname].candidate and
self[pkgname].candidate.version == ver and
(self[pkgname].marked_install or
self[pkgname].marked_upgrade)):
raise SystemError(_("Trying to install deny listed version '%s'") % bv)
return True
def _lookupPkgRecord(self, pkg):
"""
helper to make sure that the pkg._records is pointing to the right
location - needed because python-apt 0.7.9 dropped the python-apt
version but we can not yet use the new version because on upgrade
the old version is still installed
"""
ver = pkg._pcache._depcache.get_candidate_ver(pkg._pkg)
if ver is None:
print("No candidate ver: ", pkg.name)
return False
if ver.file_list is None:
print("No file_list for: %s " % self._pkg.name())
return False
f, index = ver.file_list.pop(0)
pkg._pcache._records.lookup((f, index))
return True
@property
def installedTasks(self):
tasks = {}
installed_tasks = set()
for pkg in self:
if not self._lookupPkgRecord(pkg):
logging.debug("no PkgRecord found for '%s', skipping " % pkg.name)
continue
for line in pkg._pcache._records.record.split("\n"):
if line.startswith("Task:"):
for task in (line[len("Task:"):]).split(","):
task = task.strip()
if task not in tasks:
tasks[task] = set()
tasks[task].add(pkg.name)
for task in tasks:
installed = True
ignored_tasks = self.config.getlist("Distro", "IgnoredTasks")
if task in ignored_tasks:
installed = False
for pkgname in tasks[task]:
if not self[pkgname].is_installed:
installed = False
break
if installed:
installed_tasks.add(task)
return installed_tasks
def installTasks(self, tasks):
logging.debug("running installTasks")
for pkg in self:
if pkg.marked_install or pkg.is_installed:
continue
self._lookupPkgRecord(pkg)
if not (hasattr(pkg._pcache._records, "record") and pkg._pcache._records.record):
logging.warning("can not find Record for '%s'" % pkg.name)
continue
for line in pkg._pcache._records.record.split("\n"):
if line.startswith("Task:"):
for task in (line[len("Task:"):]).split(","):
task = task.strip()
if task in tasks:
pkg.mark_install()
return True
def _keepBaseMetaPkgsInstalled(self, view):
for pkg in self.config.getlist("Distro", "BaseMetaPkgs"):
self._keep_installed(pkg, "base meta package keep installed rule")
def _installMetaPkgs(self, view):
def metaPkgInstalled():
"""
internal helper that checks if at least one meta-pkg is
installed or marked install
"""
for key in metapkgs:
if key in self:
pkg = self[key]
if pkg.is_installed and pkg.marked_delete:
logging.debug("metapkg '%s' installed but marked_delete" % pkg.name)
if ((pkg.is_installed and not pkg.marked_delete)
or self[key].marked_install):
return True
return False
# now check for ubuntu-desktop, kubuntu-desktop, edubuntu-desktop
metapkgs = self.config.getlist("Distro", "MetaPkgs")
# we never go without ubuntu-base
for pkg in self.config.getlist("Distro", "BaseMetaPkgs"):
self[pkg].mark_install()
# every meta-pkg that is installed currently, will be marked
# install (that result in a upgrade and removes a mark_delete)
for key in metapkgs:
try:
if (key in self and
self[key].is_installed and
self[key].is_upgradable):
logging.debug("Marking '%s' for upgrade" % key)
self[key].mark_upgrade()
except SystemError as e:
# warn here, but don't fail, its possible that meta-packages
# conflict (like ubuntu-desktop vs xubuntu-desktop) LP: #775411
logging.warning("Can't mark '%s' for upgrade (%s)" % (key, e))
# check if we have a meta-pkg, if not, try to guess which one to pick
if not metaPkgInstalled():
logging.debug("none of the '%s' meta-pkgs installed" % metapkgs)
for key in metapkgs:
deps_found = True
for pkg in self.config.getlist(key, "KeyDependencies"):
deps_found &= pkg in self and self[pkg].is_installed
if deps_found:
logging.debug("guessing '%s' as missing meta-pkg" % key)
try:
self[key].mark_install()
except (SystemError, KeyError) as e:
logging.error("failed to mark '%s' for install (%s)" %
(key, e))
view.error(_("Can't install '%s'") % key,
_("It was impossible to install a "
"required package. Please report "
"this as a bug using "
"'ubuntu-bug ubuntu-release-upgrader-core' in "
"a terminal."))
return False
logging.debug("marked_install: '%s' -> '%s'" % (key, self[key].marked_install))
break
# check if we actually found one
if not metaPkgInstalled():
meta_pkgs = ', '.join(metapkgs[0:-1])
view.error(_("Can't guess meta-package"),
_("Your system does not contain a "
"%s or %s package and it was not "
"possible to detect which version of "
"Ubuntu you are running.\n "
"Please install one of the packages "
"above first using synaptic or "
"apt-get before proceeding.") %
(meta_pkgs, metapkgs[-1]))
return False
return True
def _inRemovalDenylist(self, pkgname):
for expr in self.removal_denylist:
if re.compile(expr).match(pkgname):
logging.debug("denylist expr '%s' matches '%s'" %
(expr, pkgname))
return True
return False
@withResolverLog
def tryMarkObsoleteForRemoval(self, pkgname, remove_candidates, forced_obsoletes, foreign_pkgs):
#logging.debug("tryMarkObsoleteForRemoval(): %s" % pkgname)
# coherence check, first see if it looks like a running kernel pkg
if pkgname.endswith(self.uname):
logging.debug("skipping running kernel pkg '%s'" % pkgname)
return False
if pkgname == self.linux_metapackage:
logging.debug("skipping kernel metapackage '%s'" % pkgname)
return False
if self._inRemovalDenylist(pkgname):
logging.debug("skipping '%s' (in removalDenylist)" % pkgname)
return False
# ensure we honor KeepInstalledSection here as well
for section in self.config.getlist("Distro", "KeepInstalledSection"):
if (pkgname in self and self[pkgname].installed and
self[pkgname].installed.section == section):
logging.debug("skipping '%s' (in KeepInstalledSection)" % pkgname)
return False
# if we don't have the package anyway, we are fine (this can
# happen when forced_obsoletes are specified in the config file)
if pkgname not in self:
#logging.debug("package '%s' not in cache" % pkgname)
return True
# check if we want to purge
try:
purge = self.config.getboolean("Distro", "PurgeObsoletes")
except configparser.NoOptionError:
purge = False
# if this package has not been forced obsolete, only
# delete it if it doesn't remove other dependents
# that are not obsolete as well
actiongroup = apt_pkg.ActionGroup(self._depcache)
# just make pyflakes shut up, later we should use
# with self.actiongroup():
actiongroup
self.create_snapshot()
try:
self[pkgname].mark_delete(purge=purge)
self.view.processEvents()
if pkgname in forced_obsoletes:
return True
#logging.debug("marking '%s' for removal" % pkgname)
for pkg in self.get_changes():
if (pkg.name not in remove_candidates or
pkg.name in foreign_pkgs or
self._inRemovalDenylist(pkg.name) or
pkg.name == self.linux_metapackage):
logging.debug("package '%s' produces an unwanted removal '%s', skipping" % (pkgname, pkg.name))
self.restore_snapshot()
return False
except (SystemError, KeyError) as e:
logging.warning("_tryMarkObsoleteForRemoval failed for '%s' (%s: %s)" % (pkgname, repr(e), e))
self.restore_snapshot()
return False
return True
def _getObsoletesPkgs(self):
" get all package names that are not downloadable "
obsolete_pkgs = set()
for pkg in self:
if pkg.is_installed:
# check if any version is downloadable. we need to check
# for older ones too, because there might be
# cases where e.g. firefox in gutsy-updates is newer
# than hardy
if not self.anyVersionDownloadable(pkg):
obsolete_pkgs.add(pkg.name)
return obsolete_pkgs
def anyVersionDownloadable(self, pkg):
" helper that checks if any of the version of pkg is downloadable "
for ver in pkg._pkg.version_list:
if ver.downloadable:
return True
return False
def _getUnusedDependencies(self):
" get all package names that are not downloadable "
unused_dependencies = set()
for pkg in self:
if pkg.is_installed and self._depcache.is_garbage(pkg._pkg):
unused_dependencies.add(pkg.name)
return unused_dependencies
def get_installed_demoted_packages(self):
""" return list of installed and demoted packages
If a demoted package is a automatic install it will be skipped
"""
demotions = set()
demotions_file = self.config.get("Distro", "Demotions")
if os.path.exists(demotions_file):
with open(demotions_file) as demotions_f:
for line in demotions_f:
if not line.startswith("#"):
demotions.add(line.strip())
installed_demotions = set()
for demoted_pkgname in demotions:
if demoted_pkgname not in self:
continue
pkg = self[demoted_pkgname]
if (not pkg.is_installed or
self._depcache.is_auto_installed(pkg._pkg) or
pkg.marked_delete):
continue
installed_demotions.add(pkg)
return list(installed_demotions)
def _getForeignPkgs(self, allowed_origin, fromDist, toDist):
""" get all packages that are installed from a foreign repo
(and are actually downloadable)
"""
foreign_pkgs = set()
for pkg in self:
if pkg.is_installed and self.downloadable(pkg):
if not pkg.candidate:
continue
# assume it is foreign and see if it is from the
# official archive
foreign = True
for origin in pkg.candidate.origins:
# FIXME: use some better metric here
if fromDist in origin.archive and \
origin.origin == allowed_origin:
foreign = False
if toDist in origin.archive and \
origin.origin == allowed_origin:
foreign = False
if foreign:
foreign_pkgs.add(pkg.name)
return foreign_pkgs
def checkFreeSpace(self, snapshots_in_use=False):
"""
this checks if we have enough free space on /var, /boot and /usr
with the given cache
Note: this can not be fully accurate if there are multiple
mountpoints for /usr, /var, /boot
"""
class FreeSpace(object):
" helper class that represents the free space on each mounted fs "
def __init__(self, initialFree):
self.free = initialFree
self.need = 0
def make_fs_id(d):
""" return 'id' of a directory so that directories on the
same filesystem get the same id (simply the mount_point)
"""
for mount_point in mounted:
if d.startswith(mount_point):
return mount_point
return "/"
# this is all a bit complicated
# 1) check what is mounted (in mounted)
# 2) create FreeSpace objects for the dirs we are interested in
# (mnt_map)
# 3) use the mnt_map to check if we have enough free space and
# if not tell the user how much is missing
mounted = []
mnt_map = {}
fs_free = {}
with open("/proc/mounts") as mounts:
for line in mounts:
try:
(what, where, fs, options, a, b) = line.split()
except ValueError as e:
logging.debug("line '%s' in /proc/mounts not understood (%s)" % (line, e))
continue
if not where in mounted:
mounted.append(where)
# make sure mounted is sorted by longest path
mounted.sort(key=len, reverse=True)
archivedir = apt_pkg.config.find_dir("Dir::Cache::archives")
aufs_rw_dir = "/tmp/"
if (hasattr(self, "config") and
self.config.getWithDefault("Aufs", "Enabled", False)):
aufs_rw_dir = self.config.get("Aufs", "RWDir")
if not os.path.exists(aufs_rw_dir):
os.makedirs(aufs_rw_dir)
logging.debug("cache aufs_rw_dir: %s" % aufs_rw_dir)
for d in ["/", "/usr", "/var", "/boot", archivedir, aufs_rw_dir, "/home", "/tmp/"]:
d = os.path.realpath(d)
fs_id = make_fs_id(d)
if os.path.exists(d):
st = os.statvfs(d)
free = st.f_bavail * st.f_frsize
else:
logging.warning("directory '%s' does not exists" % d)
free = 0
if fs_id in mnt_map:
logging.debug("Dir %s mounted on %s" %
(d, mnt_map[fs_id]))
fs_free[d] = fs_free[mnt_map[fs_id]]
else:
logging.debug("Free space on %s: %s" %
(d, free))
mnt_map[fs_id] = d
fs_free[d] = FreeSpace(free)
del mnt_map
logging.debug("fs_free contains: '%s'" % fs_free)
# now calculate the space that is required on /boot
# we do this by checking how many linux-image-$ver packages
# are installed or going to be installed
kernel_count = 0
for pkg in self:
# we match against everything that looks like a kernel
# and add space check to filter out metapackages
if re.match("^linux-(image|image-debug)-[0-9.]*-.*", pkg.name):
# upgrade because early in the release cycle the major version
# may be the same or they might be -lts- kernels
if pkg.marked_install or pkg.marked_upgrade:
logging.debug("%s (new-install) added with %s to boot space" % (pkg.name, KERNEL_SIZE))
kernel_count += 1
# space calculated per LP: #1646222
space_in_boot = (kernel_count * KERNEL_SIZE
+ (kernel_count + 1) * INITRD_SIZE)
# we check for various sizes:
# archivedir is where we download the debs
# /usr is assumed to get *all* of the install space (incorrect,
# but as good as we can do currently + safety buffer
# / has a small safety buffer as well
required_for_aufs = 0.0
if (hasattr(self, "config") and
self.config.getWithDefault("Aufs", "Enabled", False)):
logging.debug("taking aufs overlay into space calculation")
aufs_rw_dir = self.config.get("Aufs", "RWDir")
# if we use the aufs rw overlay all the space is consumed
# the overlay dir
for pkg in self:
if pkg.marked_upgrade or pkg.marked_install:
required_for_aufs += pkg.candidate.installed_size
# add old size of the package if we use snapshots
required_for_snapshots = 0.0
if snapshots_in_use:
for pkg in self:
if (pkg.is_installed and
(pkg.marked_upgrade or pkg.marked_delete)):
required_for_snapshots += pkg.installed.installed_size
logging.debug("additional space for the snapshots: %s" % required_for_snapshots)
# sum up space requirements
for (dir, size) in [(archivedir, self.required_download),
("/usr", self.additional_required_space),
# this is only >0 for the deb-to-snap quirks
("/var", self.additional_required_space_for_snaps),
# plus 50M safety buffer in /usr
("/usr", 50*1024*1024),
("/boot", space_in_boot),
("/tmp", 5*1024*1024), # /tmp for dkms LP: #427035
("/", 10*1024*1024), # small safety buffer /
(aufs_rw_dir, required_for_aufs),
# if snapshots are in use
("/usr", required_for_snapshots),
]:
# we are ensuring we have more than enough free space not less
if size < 0:
continue
dir = os.path.realpath(dir)
logging.debug("dir '%s' needs '%s' of '%s' (%f)" % (dir, size, fs_free[dir], fs_free[dir].free))
fs_free[dir].free -= size
fs_free[dir].need += size
# check for space required violations
required_list = {}
for dir in fs_free:
if fs_free[dir].free < 0:
# ensure unicode here (LP: #1172740)
free_at_least = apt_pkg.size_to_str(float(abs(fs_free[dir].free)+1))
if isinstance(free_at_least, bytes):
free_at_least = free_at_least.decode(
locale.getpreferredencoding())
free_needed = apt_pkg.size_to_str(fs_free[dir].need)
if isinstance(free_needed, bytes):
free_needed = free_needed.decode(
locale.getpreferredencoding())
# make_fs_id ensures we only get stuff on the same
# mountpoint, so we report the requirements only once
# per mountpoint
required_list[make_fs_id(dir)] = FreeSpaceRequired(free_needed, make_fs_id(dir), free_at_least)
# raise exception if free space check fails
if len(required_list) > 0:
logging.error("Not enough free space: %s" % [str(i) for i in required_list])
raise NotEnoughFreeSpaceError(list(required_list.values()))
return True
if __name__ == "__main__":
import sys
from .DistUpgradeConfigParser import DistUpgradeConfig
from .DistUpgradeView import DistUpgradeView
print("foo")
c = MyCache(DistUpgradeConfig("."), DistUpgradeView(), None)
#c.checkForNvidia()
#print(c._identifyObsoleteKernels())
print(c.checkFreeSpace())
sys.exit()
c.clear()
c.create_snapshot()
c.installedTasks
c.installTasks(["ubuntu-desktop"])
print(c.get_changes())
c.restore_snapshot()
Mini Shell