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# 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 warnings
warnings.filterwarnings("ignore", "apt API not stable yet", FutureWarning)
import apt
import apt_pkg
import os
import os.path
import re
import logging
import string
import statvfs
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, estimate_kernel_size_in_boot
class CacheException(Exception):
pass
class CacheExceptionLockingFailed(CacheException):
pass
class CacheExceptionDpkgInterrupted(CacheException):
pass
# the initrd/vmlinuz/abi space required in /boot for each kernel
# we estimate based on the current kernel size and add a safety marging
def _set_kernel_initrd_size():
size = estimate_kernel_size_in_boot()
if size == 0:
logging.warn("estimate_kernel_size_in_boot() returned '0'?")
size = 28*1024*1024
# add small safety buffer
size += 1*1024*1024
return size
KERNEL_INITRD_SIZE = _set_kernel_initrd_size()
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):
apt.Cache.__init__(self, progress)
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.PkgSystemLock()
self.lockListsDir()
self.lock = True
except SystemError, e:
# checking for this is ok, its not translatable
if "dpkg --configure -a" in str(e):
raise CacheExceptionDpkgInterrupted, e
raise CacheExceptionLockingFailed, e
# a list of regexp that are not allowed to be removed
self.removal_blacklist = config.getListFromFile("Distro","RemovalBlacklistFile")
self.uname = Popen(["uname","-r"],stdout=PIPE).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")
@property
def reqReinstallPkgs(self):
" return the packages not downloadable packages in reqreinst state "
reqreinst = set()
for pkg in self:
if (not pkg.candidateDownloadable and
(pkg._pkg.inst_state == self.ReInstReq or
pkg._pkg.inst_state == self.HoldReInstReq)):
reqreinst.add(pkg.name)
return reqreinst
def fixReqReinst(self, view):
" check for reqreinst state and offer to fix it "
reqreinst = self.reqReinstallPkgs
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.releaseLock()
cmd = ["dpkg","--remove","--force-remove-reinstreq"] + list(reqreinst)
view.getTerminal().call(cmd)
self.getLock()
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, 0644)
os.write(self.logfd, "Log time: %s\n" % datetime.datetime.now())
# turn on debugging in the cache
apt_pkg.Config.set("Debug::pkgProblemResolver","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 requiredDownload(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 additionalRequiredSpace(self):
""" get the size of the additional required space on the fs """
return self._depcache.usr_size
@property
def isBroken(self):
""" is the cache broken """
return self._depcache.broken_count > 0
# methods
def lockListsDir(self):
name = apt_pkg.Config.find_dir("Dir::State::Lists") + "lock"
self._listsLock = apt_pkg.GetLock(name)
if self._listsLock < 0:
e = "Can not lock '%s' " % name
raise CacheExceptionLockingFailed, e
def unlockListsDir(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.unlockListsDir()
res = apt.Cache.update(self, fprogress)
self.lockListsDir()
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.releaseLock()
apt.Cache.commit(self, fprogress, iprogress)
def releaseLock(self, pkgSystemOnly=True):
if self.lock:
try:
apt_pkg.PkgSystemUnLock()
self.lock = False
except SystemError, e:
logging.debug("failed to SystemUnLock() (%s) " % e)
def getLock(self, pkgSystemOnly=True):
if not self.lock:
try:
apt_pkg.PkgSystemLock()
self.lock = True
except SystemError, 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.CurrentVer
if ver == None:
logging.warning("no version information for '%s' (useCandidate=%s)" % (pkg.name, useCandidate))
return False
return ver.downloadable
def pkgAutoRemovable(self, pkg):
""" check if the pkg is auto-removable """
return (pkg.is_installed and
self._depcache.is_garbage(pkg._pkg))
def fixBroken(self):
""" try to fix broken dependencies on the system, may throw
SystemError when it can't"""
return self._depcache.FixBroken()
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 needServerMode(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("needServerMode() 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 self.has_key(key) and self[key].is_installed:
logging.debug("needServerMode(): 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 &= self.has_key(pkg) and self[pkg].is_installed
if deps_found:
logging.debug("needServerMode(): run in 'desktop' mode, (because of key deps for '%s')" % key)
return False
logging.debug("needServerMode(): can not find a desktop meta package or key deps, running in server mode")
return True
def sanityCheck(self, view):
""" check if the cache is ok and if the required metapkgs
are installed
"""
if self.isBroken:
try:
logging.debug("Have broken pkgs, trying to fix them")
self.fixBroken()
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=""):
logging.debug("Installing '%s' (%s)" % (pkg, reason))
if self.has_key(pkg):
self[pkg].mark_install()
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 self.has_key(pkg) 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=""):
logging.debug("Removing '%s' (%s)" % (pkg, reason))
if self.has_key(pkg):
self[pkg].mark_delete()
def mark_purge(self, pkg, reason=""):
logging.debug("Purging '%s' (%s)" % (pkg, reason))
if self.has_key(pkg):
self._depcache.mark_delete(self[pkg]._pkg,True)
def _keepInstalled(self, pkgname, reason):
if (self.has_key(pkgname)
and self[pkgname].is_installed
and self[pkgname].marked_delete):
self.mark_install(pkgname, reason)
def keepInstalledRule(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._keepInstalled(pkgname, "Distro KeepInstalledPkgs rule")
# the the per-metapkg rules
for key in self.metapkgs:
if self.has_key(key) and (self[key].is_installed or
self[key].marked_install):
for pkgname in self.config.getlist(key,"KeepInstalledPkgs"):
self._keepInstalled(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.candidateDownloadable and pkg.marked_delete and pkg.section == section:
self._keepInstalled(pkg.name, "Distro KeepInstalledSection rule: %s" % section)
for key in self.metapkgs:
if self.has_key(key) and (self[key].is_installed or
self[key].marked_install):
for section in self.config.getlist(key,"KeepInstalledSection"):
for pkg in self:
if pkg.candidateDownloadable and pkg.marked_delete and pkg.section == section:
self._keepInstalled(pkg.name, "%s KeepInstalledSection rule: %s" % (key, section))
def postUpgradeRule(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 self.has_key(key) 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 identifyObsoleteKernels(self):
# we have a funny policy that we remove security updates
# for the kernel from the archive again when a new ABI
# version hits the archive. this means that we have
# e.g.
# linux-image-2.6.24-15-generic
# is obsolete when
# linux-image-2.6.24-19-generic
# is available
# ...
# This code tries to identify the kernels that can be removed
logging.debug("identifyObsoleteKernels()")
obsolete_kernels = set()
version = self.config.get("KernelRemoval","Version")
basenames = self.config.getlist("KernelRemoval","BaseNames")
types = self.config.getlist("KernelRemoval","Types")
for pkg in self:
for base in basenames:
basename = "%s-%s-" % (base,version)
for type in types:
if (pkg.name.startswith(basename) and
pkg.name.endswith(type) and
pkg.is_installed):
if (pkg.name == "%s-%s" % (base,self.uname)):
logging.debug("skipping running kernel %s" % pkg.name)
continue
logging.debug("removing obsolete kernel '%s'" % pkg.name)
obsolete_kernels.add(pkg.name)
logging.debug("identifyObsoleteKernels found '%s'" % obsolete_kernels)
return obsolete_kernels
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, e:
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(datadir="./modaliases/",
obsolete="./nvidia-obsolete.pkgs")
#nv = NvidiaDetection()
# check if a binary driver is installed now
for oldDriver in nv.oldPackages:
if self.has_key(oldDriver) 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 self.has_key(driver):
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, e:
logging.error("NvidiaDetection returned a error: %s" % e)
return False
def getKernelsFromBaseInstaller(self):
"""get the list of recommended kernels from base-installer"""
kernels = Popen(["/bin/sh", "./get_kernel_list.sh"],
stdout=PIPE).communicate()[0]
kernels = filter(lambda x : len(x) > 0,
map(string.strip, kernels.split("\n")))
logging.debug("./get_kernel_list.sh returns: %s" % kernels)
return kernels
def _selectKernelFromBaseInstaller(self):
""" use the get_kernel_list.sh script (that uses base-installer)
to figure out what kernel is most suitable for the system
"""
# check if we have a kernel from that list installed first
kernels = self.getKernelsFromBaseInstaller()
for kernel in kernels:
if not self.has_key(kernel):
logging.debug("%s not available in cache" % kernel)
continue
# this can happen e.g. on cdrom -> cdrom only upgrades
# where on hardy we have linux-386 but on the lucid CD
# we only have linux-generic
if not self[kernel].candidateDownloadable:
logging.debug("%s not downloadable" % kernel)
continue
# check if installed
if self[kernel].is_installed or self[kernel].marked_install:
logging.debug("%s kernel already installed" % kernel)
if self[kernel].is_upgradable and not self[kernel].marked_upgrade:
self.mark_upgrade(kernel, "Upgrading kernel from base-installer")
return
# if we have not found a kernel yet, use the first one that installs
for kernel in kernels:
if self.mark_install(kernel, "Selecting new kernel from base-installer"):
return
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, 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 "WARNING: NR_CPUS limit" in dmesg:
logging.debug("UP kernel on SMP system!?!")
# use base-installer to get the kernel we want (if it exists)
if os.path.exists("./get_kernel_list.sh"):
self._selectKernelFromBaseInstaller()
else:
logging.debug("skipping ./get_kernel_list.sh: not found")
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:
# WORKADOUND 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.candidateDownloadable 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.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:
# 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.keepInstalledRule()
# check if we got a new kernel (if we are not inside a
# chroot)
if inside_chroot():
logging.warn("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.postUpgradeRule()
# 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()
except SystemError, e:
# this should go into a finally: line, see below for the
# rationale why it doesn't
lock.release()
t.join()
# FIXME: change the text to something more useful
details = _("An unresolvable problem occurred while "
"calculating the upgrade:\n%s\n\n "
"This can be caused by:\n"
" * Upgrading to a pre-release version of Ubuntu\n"
" * Running the current pre-release version of Ubuntu\n"
" * Unofficial software packages not provided by Ubuntu\n"
"\n" % e)
# 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 update-manager' in a terminal.")
# make the error text available again on stdout for the
# text frontend
self._stopAptResolverLog()
view.error(_("Could not calculate the upgrade"), details)
# start the resolver log again because this is run with
# the withResolverLog decorator
self._startAptResolverLog()
logging.error("Dist-upgrade failed: '%s'", e)
return False
# would be nice to be able to use finally: here, but we need
# to run on python2.4 too
#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 = []
for pkg in self.get_changes():
if pkg.marked_delete:
continue
# special case because of a bug in pkg.candidateOrigin
if pkg.marked_downgrade:
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, e:
pass
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 constrains (blacklisted removals etc)
"""
removeEssentialOk = self.config.getlist("Distro","RemoveEssentialOk")
# check changes
for pkg in self.get_changes():
if pkg.marked_delete and self._inRemovalBlacklist(pkg.name):
logging.debug("The package '%s' is marked for removal but it's in the removal blacklist", pkg.name)
raise SystemError, _("The package '%s' is marked for removal but it is in the removal blacklist.") % pkg.name
if pkg.marked_delete and (pkg._pkg.Essential == True and
not pkg.name in removeEssentialOk):
logging.debug("The package '%s' is marked for removal but it's a ESSENTIAL package", pkg.name)
raise SystemError, _("The essential package '%s' is marked for removal.") % pkg.name
# check bad-versions blacklist
badVersions = self.config.getlist("Distro","BadVersions")
for bv in badVersions:
(pkgname, ver) = bv.split("_")
if (self.has_key(pkgname) and
self[pkgname].candidateVersion == ver and
(self[pkgname].marked_install or
self[pkgname].marked_upgrade)):
raise SystemError, _("Trying to install blacklisted 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 FileList 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 not tasks.has_key(task):
tasks[task] = set()
tasks[task].add(pkg.name)
for task in tasks:
installed = True
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._keepInstalled(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 self.has_key(key):
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 markDelete)
for key in metapkgs:
try:
if (self.has_key(key) and
self[key].is_installed and
self[key].is_upgradable):
logging.debug("Marking '%s' for upgrade" % key)
self[key].mark_upgrade()
except SystemError, e:
# warn here, but don't fail, its possible that meta-packages
# conflict (like ubuntu-desktop vs xubuntu-desktop) LP: #775411
logging.warn("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 &= self.has_key(pkg) 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), 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 update-manager' 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():
# FIXME: provide a list
view.error(_("Can't guess meta-package"),
_("Your system does not contain a "
"ubuntu-desktop, kubuntu-desktop, xubuntu-desktop or "
"edubuntu-desktop 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."))
return False
return True
def _inRemovalBlacklist(self, pkgname):
for expr in self.removal_blacklist:
if re.compile(expr).match(pkgname):
logging.debug("blacklist expr '%s' matches '%s'" % (expr, pkgname))
return True
return False
@withResolverLog
def tryMarkObsoleteForRemoval(self, pkgname, remove_candidates, foreign_pkgs):
#logging.debug("tryMarkObsoleteForRemoval(): %s" % pkgname)
# sanity 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 self._inRemovalBlacklist(pkgname):
logging.debug("skipping '%s' (in removalBlacklist)" % pkgname)
return False
# ensure we honor KeepInstalledSection here as well
for section in self.config.getlist("Distro","KeepInstalledSection"):
if self.has_key(pkgname) and self[pkgname].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 not self.has_key(pkgname):
#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, e:
purge = False
# this is a delete candidate, only actually delete,
# if it dosn't remove other packages depending on it
# 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].markDelete(purge=purge)
self.view.processEvents()
#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._inRemovalBlacklist(pkg.name)):
logging.debug("package '%s' has unwanted removals, skipping" % pkgname)
self.restore_snapshot()
return False
except (SystemError,KeyError),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):
map(lambda pkgname: demotions.add(pkgname.strip()),
filter(lambda line: not line.startswith("#"),
open(demotions_file).readlines()))
installed_demotions = set()
for demoted_pkgname in demotions:
if not self.has_key(demoted_pkgname):
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):
# assume it is foreign and see if it is from the
# official archive
foreign=True
for origin in pkg.candidateOrigin:
# 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 = {}
for line in open("/proc/mounts"):
try:
(what, where, fs, options, a, b) = line.split()
except ValueError, 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(cmp=lambda a,b: cmp(len(a),len(b)), 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[statvfs.F_BAVAIL]*st[statvfs.F_FRSIZE]
else:
logging.warn("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
space_in_boot = 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):
if pkg.marked_install:
logging.debug("%s (new-install) added with %s to boot space" % (pkg.name, KERNEL_INITRD_SIZE))
space_in_boot += KERNEL_INITRD_SIZE
# mvo: jaunty does not create .bak files anymore
#elif (pkg.marked_upgrade or pkg.is_installed):
# logging.debug("%s (upgrade|installed) added with %s to boot space" % (pkg.name, KERNEL_INITRD_SIZE))
# space_in_boot += KERNEL_INITRD_SIZE # creates .bak
# we check for various sizes:
# archivedir is were 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.requiredDownload),
# plus 50M safety buffer in /usr
("/usr", self.additionalRequiredSpace),
("/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),
]:
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:
free_at_least = apt_pkg.SizeToStr(float(abs(fs_free[dir].free)+1))
# 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(apt_pkg.SizeToStr(fs_free[dir].need), 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(required_list.values())
return True
if __name__ == "__main__":
import sys
import DistUpgradeConfigParser
import DistUpgradeView
print "foo"
c = MyCache(DistUpgradeConfigParser.DistUpgradeConfig("."),
DistUpgradeView.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()
