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Text File | 2009-11-02 | 48KB | 1,102 lines

# 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 gettext import datetime import threading import ConfigParser from subprocess import Popen, PIPE from DistUpgradeGettext import gettext as _ from DistUpgradeGettext import ngettext from DistUpgradeConfigParser import DistUpgradeConfig from DistUpgradeView import FuzzyTimeToStr class CacheException(Exception): pass class CacheExceptionLockingFailed(CacheException): pass class CacheExceptionDpkgInterrupted(CacheException): pass # the initrd/vmlinuz/abi space required in /boot for each kernel KERNEL_INITRD_SIZE = 15*1024*1024 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.InstState == self.ReInstReq or pkg._pkg.InstState == 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|os.O_SYNC, 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.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 additional required space on the fs """ return self._depcache.UsrSize @property def isBroken(self): """ is the cache broken """ return self._depcache.BrokenCount > 0 # methods def lockListsDir(self): name = apt_pkg.Config.FindDir("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.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.GetCandidateVer(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 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 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].isInstalled: 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].isInstalled 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 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) return False return True def markUpgrade(self, pkg, reason=""): logging.debug("Upgrading '%s' (%s)" % (pkg, reason)) if self.has_key(pkg) and self[pkg].isInstalled: self[pkg].markUpgrade() if not self[pkg].markedUpgrade: logging.error("Upgrading '%s' failed" % pkg) return False return True 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 _keepInstalled(self, pkgname, reason): if (self.has_key(pkgname) and self[pkgname].isInstalled and self[pkgname].markedDelete): self.markInstall(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].isInstalled or self[key].markedInstall): 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.markedDelete 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].isInstalled or self[key].markedInstall): for section in self.config.getlist(key,"KeepInstalledSection"): for pkg in self: if pkg.markedDelete 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.markInstall), ("Upgrade", self.markUpgrade), ("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)) # 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.isInstalled): 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/") #nv = NvidiaDetection() # check if a binary driver is installed now for oldDriver in nv.oldPackages: if self.has_key(oldDriver) and self[oldDriver].isInstalled: self.markRemove(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].markedInstall or self[driver].markedUpgrade): self[driver].markInstall() 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 # check if installed if self[kernel].isInstalled: logging.debug("%s kernel already installed" % kernel) if self[kernel].isUpgradable and not self[kernel].markedUpgrade: self.markUpgrade(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.markInstall(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.GetCandidateVer(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.isInstalled or 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) # FIXME: make this a decorator (just like the withResolverLog()) def updateGUI(self, view, lock): while lock.locked(): view.processEvents() time.sleep(0.01) @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 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 against " "the 'update-manager' package and include the files in " "/var/log/dist-upgrade/ in the bug report.") # 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.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: indexfile = pkg._list.FindIndex(verFileIter) if indexfile and not indexfile.IsTrusted: untrusted.append(pkg.name) break continue origins = pkg.candidateOrigin 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.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) raise SystemError, _("The package '%s' is marked for removal but it is in the removal blacklist.") % pkg.name 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) 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].markedInstall or self[pkgname].markedUpgrade)): 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.GetCandidateVer(pkg._pkg) if ver is None: print "No candidate ver: ", pkg.name return False if ver.FileList is None: print "No FileList for: %s " % self._pkg.Name() return False f, index = ver.FileList.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].isInstalled: 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.markedInstall or pkg.isInstalled: 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.markInstall() 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.isInstalled and pkg.markedDelete: logging.debug("metapkg '%s' installed but markedDelete" % pkg.name) if ((pkg.isInstalled and not pkg.markedDelete) or self[key].markedInstall): 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].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)) raise SystemError, _("Can not mark '%s' for upgrade") % key # 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, 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. ")) return False logging.debug("markedInstall: '%s' -> '%s'" % (key, self[key].markedInstall)) 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): 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.GetPkgActionGroup(self._depcache) self.create_snapshot() try: self[pkgname].markDelete(purge=purge) self.view.processEvents() #logging.debug("marking '%s' for removal" % pkgname) for pkg in self.getChanges(): 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.isInstalled: # 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.VersionList: 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.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: # 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): """ 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.FindDir("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) st = os.statvfs(d) free = st[statvfs.F_BAVAIL]*st[statvfs.F_FRSIZE] 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.markedInstall: 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.markedUpgrade or pkg.isInstalled): # 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.markedUpgrade or pkg.markedInstall: required_for_aufs += self._depcache.GetCandidateVer(pkg._pkg).Size # 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), ]: 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 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.getChanges() c.restore_snapshot()