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import warnings
warnings.filterwarnings("ignore", "apt API not stable yet", FutureWarning)
import apt
import apt_pkg
import os
import re
import logging
from subprocess import Popen, PIPE
from gettext import gettext as _
from DistUpgradeConfigParser import DistUpgradeConfig
from DistUpgradeView import FuzzyTimeToStr
# FIXME: we need this only for the later "isinstance()" check
# this should probably be solved in some different way
from DistUpgradeViewText import DistUpgradeViewText
from DistUpgradeViewNonInteractive import DistUpgradeViewNonInteractive
class CacheException(Exception):
pass
class CacheExceptionLockingFailed(CacheException):
pass
class MyCache(apt.Cache):
# init
def __init__(self, config, view, progress=None, lock=True):
apt.Cache.__init__(self, progress)
self.to_install = []
self.to_remove = []
self.view = view
self.config = config
self.metapkgs = self.config.getlist("Distro","MetaPkgs")
# acquire lock
#if lock:
# try:
# apt_pkg.PkgSystemLock()
# except SystemError, 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()
# properties
@property
def requiredDownload(self):
""" get the size of the packages that are required to download """
pm = apt_pkg.GetPackageManager(self._depcache)
fetcher = apt_pkg.GetAcquire()
pm.GetArchives(fetcher, self._list, self._records)
return fetcher.FetchNeeded
@property
def additionalRequiredSpace(self):
""" get the size of the additonal required space on the fs """
return self._depcache.UsrSize
@property
def isBroken(self):
""" is the cache broken """
return self._depcache.BrokenCount > 0
# methods
def releaseLock(self):
apt_pkg.PkgSystemUnLock()
def downloadable(self, pkg, useCandidate=True):
" check if the given pkg can be downloaded "
if useCandidate:
ver = self._depcache.GetCandidateVer(pkg._pkg)
else:
ver = pkg._pkg.CurrentVer
if ver == None:
return False
return ver.Downloadable
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.getChanges():
if pkg.markedInstall or pkg.markedUpgrade:
self.to_install.append(pkg.name)
if pkg.markedDelete:
self.to_remove.append(pkg.name)
def clear(self):
self._depcache.Init()
def restore_snapshot(self):
""" restore a snapshot """
actiongroup = apt_pkg.GetPkgActionGroup(self._depcache)
self.clear()
for name in self.to_remove:
pkg = self[name]
pkg.markDelete()
for name in self.to_install:
pkg = self[name]
pkg.markInstall(autoFix=False, autoInst=False)
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 markInstall(self, pkg, reason=""):
logging.debug("Installing '%s' (%s)" % (pkg, reason))
if self.has_key(pkg):
self[pkg].markInstall()
if not (self[pkg].markedInstall or self[pkg].markedUpgrade):
logging.error("Installing/upgrading '%s' failed" % pkg)
#raise (SystemError, "Installing '%s' failed" % pkg)
def markRemove(self, pkg, reason=""):
logging.debug("Removing '%s' (%s)" % (pkg, reason))
if self.has_key(pkg):
self[pkg].markDelete()
def markPurge(self, pkg, reason=""):
logging.debug("Purging '%s' (%s)" % (pkg, reason))
if self.has_key(pkg):
self._depcache.MarkDelete(self[pkg]._pkg,True)
def keepInstalledRule(self):
""" run after the dist-upgrade to ensure that certain
packages are kept installed """
def keepInstalled(self, pkgname, reason):
if (self.has_key(pkgname)
and self[pkgname].isInstalled
and self[pkgname].markedDelete):
self.markInstall(pkgname, reason)
# first the global list
for pkgname in self.config.getlist("Distro","KeepInstalledPkgs"):
keepInstalled(self, pkgname, "Distro KeepInstalledPkgs rule")
# the the per-metapkg rules
for key in self.metapkgs:
if self.has_key(key) and (self[key].isInstalled or
self[key].markedInstall):
for pkgname in self.config.getlist(key,"KeepInstalledPkgs"):
keepInstalled(self, pkgname, "%s KeepInstalledPkgs rule" % key)
# now the keepInstalledSection code
for section in self.config.getlist("Distro","KeepInstalledSection"):
for pkg in self:
if pkg.markedDelete and pkg.section == section:
keepInstalled(self, pkg.name, "Distro KeepInstalledSection rule: %s" % section)
# the the per-metapkg rules
for key in self.metapkgs:
if self.has_key(key) and (self[key].isInstalled or
self[key].markedInstall):
for section in self.config.getlist(key,"KeepInstalledSection"):
for pkg in self:
if pkg.markedDelete and pkg.section == section:
keepInstalled(self, 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.markInstall),
("Remove", self.markRemove),
("Purge", self.markPurge)]:
# 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].isInstalled or
self[key].markedInstall):
for pkg in self.config.getlist(key,"PostUpgrade%s" % rule):
action(pkg, "%s PostUpgrade%s rule" % (key, rule))
# get the distro-specific quirks handler and run it
quirksFuncName = "%sQuirks" % self.config.get("Sources","To")
func = getattr(self, quirksFuncName, None)
if func is not None:
func()
def feistyQuirks(self):
""" this function works around quirks in the edgy->feisty upgrade """
logging.debug("running feistyQuirks handler")
# ndisrwapper changed again *sigh*
for (fr, to) in [("ndiswrapper-utils-1.8","ndiswrapper-utils-1.9")]:
if self.has_key(fr) and self.has_key(to):
if self[fr].isInstalled and not self[to].markedInstall:
try:
self.markInstall(to,"%s->%s quirk upgrade rule" % (fr, to))
except SystemError, e:
logging.warning("Failed to apply %s->%s install (%s)" % (fr, to, e))
def edgyQuirks(self):
""" this function works around quirks in the dapper->edgy upgrade """
logging.debug("running edgyQuirks handler")
for pkg in self:
# deal with the python2.4-$foo -> python-$foo transition
if (pkg.name.startswith("python2.4-") and
pkg.isInstalled and
not pkg.markedUpgrade):
basepkg = "python-"+pkg.name[len("python2.4-"):]
if (self.has_key(basepkg) and not self[basepkg].markedInstall):
try:
self.markInstall(basepkg,
"python2.4->python upgrade rule")
except SystemError, e:
logging.debug("Failed to apply python2.4->python install: %s (%s)" % (basepkg, e))
# xserver-xorg-input-$foo gives us trouble during the upgrade too
if (pkg.name.startswith("xserver-xorg-input-") and
pkg.isInstalled and
not pkg.markedUpgrade):
try:
self.markInstall(pkg.name, "xserver-xorg-input fixup rule")
except SystemError, e:
logging.debug("Failed to apply fixup: %s (%s)" % (pkg.name, e))
# deal with held-backs that are unneeded
for pkgname in ["hpijs", "bzr", "tomboy"]:
if (self.has_key(pkgname) and self[pkgname].isInstalled and
not self[pkgname].markedUpgrade):
try:
self.markInstall(pkgname,"%s quirk upgrade rule" % pkgname)
except SystemError, e:
logging.debug("Failed to apply %s install (%s)" % (pkgname,e))
# libgl1-mesa-dri from xgl.compiz.info (and friends) breaks the
# upgrade, work around this here by downgrading the package
if self.has_key("libgl1-mesa-dri"):
pkg = self["libgl1-mesa-dri"]
# the version from the compiz repo has a "6.5.1+cvs20060824" ver
if (pkg.candidateVersion == pkg.installedVersion and
"+cvs2006" in pkg.candidateVersion):
for ver in pkg._pkg.VersionList:
# the "officual" edgy version has "6.5.1~20060817-0ubuntu3"
if "~2006" in ver.VerStr:
# ensure that it is from a trusted repo
for (VerFileIter, index) in ver.FileList:
indexfile = self._list.FindIndex(VerFileIter)
if indexfile and indexfile.IsTrusted:
logging.info("Forcing downgrade of libgl1-mesa-dri for xgl.compz.info installs")
self._depcache.SetCandidateVer(pkg._pkg, ver)
break
# deal with general if $foo is installed, install $bar
for (fr, to) in [("xserver-xorg-driver-all","xserver-xorg-video-all")]:
if self.has_key(fr) and self.has_key(to):
if self[fr].isInstalled and not self[to].markedInstall:
try:
self.markInstall(to,"%s->%s quirk upgrade rule" % (fr, to))
except SystemError, e:
logging.debug("Failed to apply %s->%s install (%s)" % (fr, to, e))
def dapperQuirks(self):
""" this function works around quirks in the breezy->dapper upgrade """
logging.debug("running dapperQuirks handler")
if (self.has_key("nvidia-glx") and self["nvidia-glx"].isInstalled and
self.has_key("nvidia-settings") and self["nvidia-settings"].isInstalled):
logging.debug("nvidia-settings and nvidia-glx is installed")
self.markRemove("nvidia-settings")
self.markInstall("nvidia-glx")
def checkForKernel(self):
""" check for the runing kernel and try to ensure that we have
a 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!?!")
flavour = "generic"
kernel = "linux-image-%s" % flavour
if not self.has_key(kernel):
logging.warning("No kernel: '%s'" % kernel)
return False
if not (self[kernel].isInstalled or self[kernel].markedInstall):
logging.debug("Selecting new kernel '%s'" % kernel)
self[kernel].markInstall()
return True
def checkPriority(self):
# tuple of priorites 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:
if (pkg.candidateDownloadable and
(not pkg.isInstalled or not pkg.markedInstall) and
not pkg.name in removeEssentialOk and
pkg.priority in need):
self.markInstall(pkg.name, "priority in required set '%s' but not scheduled for install" % need)
def distUpgrade(self, view, serverMode, logfd):
def _restore_fds(stdout, stderr):
os.dup2(stdout, 1)
os.dup2(stderr, 2)
text_mode = (isinstance(view, DistUpgradeViewText) or
isinstance(view, DistUpgradeViewNonInteractive))
if text_mode:
old_stdout = os.dup(1)
old_stderr = os.dup(2)
os.dup2(logfd, 1)
os.dup2(logfd, 2)
try:
# upgrade (and make sure this way that the cache is ok)
self.upgrade(True)
# check that everythink in priority required is installed
self.checkPriority()
# see if our KeepInstalled rules are honored
self.keepInstalledRule()
# and if we have some special rules
self.postUpgradeRule()
# check if we got a new kernel
self.checkForKernel()
# install missing meta-packages (if not in server upgrade mode)
if not serverMode:
if not self._installMetaPkgs(view):
raise SystemError, _("Can't upgrade required meta-packages")
# see if it all makes sense
if not self._verifyChanges():
if text_mode: _restore_fds(old_stdout, old_stderr)
raise SystemError, _("A essential package would have to be removed")
except SystemError, e:
# FIXME: change the text to something more useful
view.error(_("Could not calculate the upgrade"),
_("A unresolvable problem occurred while "
"calculating the upgrade.\n\n"
"Please report this bug against the 'update-manager' "
"package and include the files in /var/log/dist-upgrade/ "
"in the bugreport."))
logging.error("Dist-upgrade failed: '%s'", e)
if text_mode: _restore_fds(old_stdout, old_stderr)
return False
# check the trust of the packages that are going to change
untrusted = []
for pkg in self.getChanges():
if pkg.markedDelete:
continue
# special case because of a bug in pkg.candidateOrigin
if pkg.markedDowngrade:
for ver in pkg._pkg.VersionList:
# version is lower than installed one
if apt_pkg.VersionCompare(ver.VerStr, pkg.installedVersion) < 0:
for (verFileIter,index) in ver.FileList:
if not origin.trusted:
untrusted.append(pkg.name)
continue
origins = pkg.candidateOrigin
trusted = False
for origin in origins:
#print origin
trusted |= origin.trusted
if not trusted:
untrusted.append(pkg.name)
b = self.config.getWithDefault("Distro","AllowUnauthenticated", False)
if b:
logging.warning("AllowUnauthenticated set!")
if (len(untrusted) > 0 and not b):
untrusted.sort()
logging.error("Unauthenticated packages found: '%s'" % \
" ".join(untrusted))
# FIXME: maybe ask a question here? instead of failing?
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))
if text_mode: _restore_fds(old_stdout, old_stderr)
return False
if text_mode: _restore_fds(old_stdout, old_stderr)
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")
for pkg in self.getChanges():
if pkg.markedDelete and self._inRemovalBlacklist(pkg.name):
logging.debug("The package '%s' is marked for removal but it's in the removal blacklist", pkg.name)
return False
if pkg.markedDelete 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)
return False
return True
@property
def installedTasks(self):
tasks = {}
installed_tasks = set()
for pkg in self:
pkg._lookupRecord()
for line in pkg._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].isInstalled:
installed = False
break
if installed:
installed_tasks.add(task)
return installed_tasks
def installTasks(self, tasks):
for pkg in self:
if pkg.markedInstall or pkg.isInstalled:
continue
pkg._lookupRecord()
for line in pkg._records.Record.split("\n"):
if line.startswith("Task:"):
for task in (line[len("Task:"):]).split(","):
task = task.strip()
if task in tasks:
pkg.markInstall()
return True
def _installMetaPkgs(self, view):
# helper for this func
def metaPkgInstalled():
metapkg_found = False
for key in metapkgs:
if self.has_key(key):
pkg = self[key]
if (pkg.isInstalled and not pkg.markedDelete) \
or self[key].markedInstall:
metapkg_found=True
return metapkg_found
# 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].markInstall()
# 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].isInstalled:
logging.debug("Marking '%s' for upgrade" % key)
self[key].markUpgrade()
except SystemError, e:
logging.debug("Can't mark '%s' for upgrade (%s)" % (key,e))
return False
# 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].isInstalled
if deps_found:
logging.debug("guessing '%s' as missing meta-pkg" % key)
try:
self[key].markInstall()
except SystemError, 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. "))
return False
# 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):
return True
return False
def _tryMarkObsoleteForRemoval(self, pkgname, remove_candidates, foreign_pkgs):
# sanity check, first see if it looks like a runing kernel pkg
if pkgname.endswith(self.uname):
logging.debug("skipping runing kernel pkg '%s'" % pkgname)
return False
if self._inRemovalBlacklist(pkgname):
logging.debug("skipping '%s' (in removalBlacklist)" % pkgname)
return 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.GetPkgActionGroup(self._depcache)
self.create_snapshot()
try:
self[pkgname].markDelete()
for pkg in self.getChanges():
if (pkg.name not in remove_candidates or
pkg.name in foreign_pkgs or
self._inRemovalBlacklist(pkg.name)):
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.isInstalled:
if not self.downloadable(pkg):
obsolete_pkgs.add(pkg.name)
return obsolete_pkgs
def _getUnusedDependencies(self):
" get all package names that are not downloadable "
unused_dependencies =set()
for pkg in self:
if pkg.isInstalled and self._depcache.IsGarbage(pkg._pkg):
unused_dependencies.add(pkg.name)
return unused_dependencies
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.isInstalled and self.downloadable(pkg):
# assume it is foreign and see if it is from the
# official archive
foreign=True
for origin in pkg.candidateOrigin:
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
if __name__ == "__main__":
import DistUpgradeConfigParser
import DistUpgradeView
c = MyCache(DistUpgradeConfigParser.DistUpgradeConfig("."),
DistUpgradeView.DistUpgradeView())
c.clear()
c.create_snapshot()
c.installedTasks
c.installTasks(["ubuntu-desktop"])
print c.getChanges()
c.restore_snapshot()
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