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Diffstat (limited to 'apt-pkg/depcache.cc')
| -rw-r--r-- | apt-pkg/depcache.cc | 2040 |
1 files changed, 2040 insertions, 0 deletions
diff --git a/apt-pkg/depcache.cc b/apt-pkg/depcache.cc new file mode 100644 index 0000000..510f2d3 --- /dev/null +++ b/apt-pkg/depcache.cc @@ -0,0 +1,2040 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + Dependency Cache - Caches Dependency information. + + ##################################################################### */ + /*}}}*/ +// Include Files /*{{{*/ +#include <config.h> + +#include <apt-pkg/aptconfiguration.h> +#include <apt-pkg/cachefile.h> +#include <apt-pkg/cacheset.h> +#include <apt-pkg/configuration.h> +#include <apt-pkg/depcache.h> +#include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/macros.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/prettyprinters.h> +#include <apt-pkg/progress.h> +#include <apt-pkg/strutl.h> +#include <apt-pkg/tagfile.h> +#include <apt-pkg/version.h> +#include <apt-pkg/versionmatch.h> + +#include <algorithm> +#include <iostream> +#include <list> +#include <set> +#include <string> +#include <utility> +#include <vector> +#include <stdio.h> +#include <string.h> + +#include <sys/stat.h> + +#include <apti18n.h> + /*}}}*/ + +using std::string; + +// helper for Install-Recommends-Sections and Never-MarkAuto-Sections /*{{{*/ +static bool +ConfigValueInSubTree(const char* SubTree, const char *needle) +{ + Configuration::Item const *Opts; + Opts = _config->Tree(SubTree); + if (Opts != 0 && Opts->Child != 0) + { + Opts = Opts->Child; + for (; Opts != 0; Opts = Opts->Next) + { + if (Opts->Value.empty() == true) + continue; + if (strcmp(needle, Opts->Value.c_str()) == 0) + return true; + } + } + return false; +} + /*}}}*/ +pkgDepCache::ActionGroup::ActionGroup(pkgDepCache &cache) : /*{{{*/ + d(NULL), cache(cache), released(false) +{ + ++cache.group_level; +} + +void pkgDepCache::ActionGroup::release() +{ + if(!released) + { + if(cache.group_level == 0) + std::cerr << "W: Unbalanced action groups, expect badness" << std::endl; + else + { + --cache.group_level; + + if(cache.group_level == 0) + cache.MarkAndSweep(); + } + + released = true; + } +} + +pkgDepCache::ActionGroup::~ActionGroup() +{ + release(); +} + /*}}}*/ +// DepCache::pkgDepCache - Constructors /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgDepCache::pkgDepCache(pkgCache * const pCache,Policy * const Plcy) : + group_level(0), Cache(pCache), PkgState(0), DepState(0), + iUsrSize(0), iDownloadSize(0), iInstCount(0), iDelCount(0), iKeepCount(0), + iBrokenCount(0), iPolicyBrokenCount(0), iBadCount(0), d(NULL) +{ + DebugMarker = _config->FindB("Debug::pkgDepCache::Marker", false); + DebugAutoInstall = _config->FindB("Debug::pkgDepCache::AutoInstall", false); + delLocalPolicy = 0; + LocalPolicy = Plcy; + if (LocalPolicy == 0) + delLocalPolicy = LocalPolicy = new Policy; +} + /*}}}*/ +// DepCache::~pkgDepCache - Destructor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgDepCache::~pkgDepCache() +{ + delete [] PkgState; + delete [] DepState; + delete delLocalPolicy; +} + /*}}}*/ +// DepCache::Init - Generate the initial extra structures. /*{{{*/ +// --------------------------------------------------------------------- +/* This allocats the extension buffers and initializes them. */ +bool pkgDepCache::Init(OpProgress * const Prog) +{ + // Suppress mark updates during this operation (just in case) and + // run a mark operation when Init terminates. + ActionGroup actions(*this); + + delete [] PkgState; + delete [] DepState; + PkgState = new StateCache[Head().PackageCount]; + DepState = new unsigned char[Head().DependsCount]; + memset(PkgState,0,sizeof(*PkgState)*Head().PackageCount); + memset(DepState,0,sizeof(*DepState)*Head().DependsCount); + + if (Prog != 0) + { + Prog->OverallProgress(0,2*Head().PackageCount,Head().PackageCount, + _("Building dependency tree")); + Prog->SubProgress(Head().PackageCount,_("Candidate versions")); + } + + /* Set the current state of everything. In this state all of the + packages are kept exactly as is. See AllUpgrade */ + int Done = 0; + for (PkgIterator I = PkgBegin(); I.end() != true; ++I, ++Done) + { + if (Prog != 0 && Done%20 == 0) + Prog->Progress(Done); + + // Find the proper cache slot + StateCache &State = PkgState[I->ID]; + State.iFlags = 0; + + // Figure out the install version + State.CandidateVer = LocalPolicy->GetCandidateVer(I); + State.InstallVer = I.CurrentVer(); + State.Mode = ModeKeep; + + State.Update(I,*this); + } + + if (Prog != 0) + { + Prog->OverallProgress(Head().PackageCount,2*Head().PackageCount, + Head().PackageCount, + _("Building dependency tree")); + Prog->SubProgress(Head().PackageCount,_("Dependency generation")); + } + + Update(Prog); + + if(Prog != 0) + Prog->Done(); + + return true; +} + /*}}}*/ +bool pkgDepCache::readStateFile(OpProgress * const Prog) /*{{{*/ +{ + FileFd state_file; + string const state = _config->FindFile("Dir::State::extended_states"); + if(RealFileExists(state)) { + state_file.Open(state, FileFd::ReadOnly, FileFd::Extension); + off_t const file_size = state_file.Size(); + if(Prog != NULL) + Prog->OverallProgress(0, file_size, 1, + _("Reading state information")); + + pkgTagFile tagfile(&state_file); + pkgTagSection section; + off_t amt = 0; + bool const debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false); + while(tagfile.Step(section)) { + string const pkgname = section.FindS("Package"); + string pkgarch = section.FindS("Architecture"); + if (pkgarch.empty() == true) + pkgarch = "any"; + pkgCache::PkgIterator pkg = Cache->FindPkg(pkgname, pkgarch); + // Silently ignore unknown packages and packages with no actual version. + if(pkg.end() == true || pkg->VersionList == 0) + continue; + + short const reason = section.FindI("Auto-Installed", 0); + if(reason > 0) + { + PkgState[pkg->ID].Flags |= Flag::Auto; + if (unlikely(debug_autoremove)) + std::clog << "Auto-Installed : " << pkg.FullName() << std::endl; + if (pkgarch == "any") + { + pkgCache::GrpIterator G = pkg.Group(); + for (pkg = G.NextPkg(pkg); pkg.end() != true; pkg = G.NextPkg(pkg)) + if (pkg->VersionList != 0) + PkgState[pkg->ID].Flags |= Flag::Auto; + } + } + amt += section.size(); + if(Prog != NULL) + Prog->OverallProgress(amt, file_size, 1, + _("Reading state information")); + } + if(Prog != NULL) + Prog->OverallProgress(file_size, file_size, 1, + _("Reading state information")); + } + + return true; +} + /*}}}*/ +bool pkgDepCache::writeStateFile(OpProgress * const /*prog*/, bool const InstalledOnly) /*{{{*/ +{ + bool const debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false); + + if(debug_autoremove) + std::clog << "pkgDepCache::writeStateFile()" << std::endl; + + FileFd StateFile; + string const state = _config->FindFile("Dir::State::extended_states"); + if (CreateAPTDirectoryIfNeeded(_config->FindDir("Dir::State"), flNotFile(state)) == false) + return false; + + // if it does not exist, create a empty one + if(!RealFileExists(state)) + { + StateFile.Open(state, FileFd::WriteAtomic, FileFd::Extension); + StateFile.Close(); + } + + // open it + if (!StateFile.Open(state, FileFd::ReadOnly, FileFd::Extension)) + return _error->Error(_("Failed to open StateFile %s"), + state.c_str()); + + FileFd OutFile(state, FileFd::ReadWrite | FileFd::Atomic, FileFd::Extension); + if (OutFile.IsOpen() == false || OutFile.Failed() == true) + return _error->Error(_("Failed to write temporary StateFile %s"), state.c_str()); + + // first merge with the existing sections + pkgTagFile tagfile(&StateFile); + pkgTagSection section; + std::set<string> pkgs_seen; + while(tagfile.Step(section)) { + string const pkgname = section.FindS("Package"); + string pkgarch = section.FindS("Architecture"); + if (pkgarch.empty() == true) + pkgarch = "native"; + // Silently ignore unknown packages and packages with no actual + // version. + pkgCache::PkgIterator pkg = Cache->FindPkg(pkgname, pkgarch); + if(pkg.end() || pkg.VersionList().end()) + continue; + StateCache const &P = PkgState[pkg->ID]; + bool newAuto = (P.Flags & Flag::Auto); + // reset to default (=manual) not installed or now-removed ones if requested + if (InstalledOnly && ( + (pkg->CurrentVer == 0 && P.Mode != ModeInstall) || + (pkg->CurrentVer != 0 && P.Mode == ModeDelete))) + newAuto = false; + if (newAuto == false) + { + // The section is obsolete if it contains no other tag + auto const count = section.Count(); + if (count < 2 || + (count == 2 && section.Exists("Auto-Installed")) || + (count == 3 && section.Exists("Auto-Installed") && section.Exists("Architecture"))) + { + if(debug_autoremove) + std::clog << "Drop obsolete section with " << count << " fields for " << APT::PrettyPkg(this, pkg) << std::endl; + continue; + } + } + + if(debug_autoremove) + std::clog << "Update existing AutoInstall to " << newAuto << " for " << APT::PrettyPkg(this, pkg) << std::endl; + + std::vector<pkgTagSection::Tag> rewrite; + rewrite.push_back(pkgTagSection::Tag::Rewrite("Architecture", pkg.Arch())); + rewrite.push_back(pkgTagSection::Tag::Rewrite("Auto-Installed", newAuto ? "1" : "0")); + section.Write(OutFile, NULL, rewrite); + if (OutFile.Write("\n", 1) == false) + return false; + pkgs_seen.insert(pkg.FullName()); + } + + // then write the ones we have not seen yet + for(pkgCache::PkgIterator pkg=Cache->PkgBegin(); !pkg.end(); ++pkg) { + StateCache const &P = PkgState[pkg->ID]; + if(P.Flags & Flag::Auto) { + if (pkgs_seen.find(pkg.FullName()) != pkgs_seen.end()) { + if(debug_autoremove) + std::clog << "Skipping already written " << APT::PrettyPkg(this, pkg) << std::endl; + continue; + } + // skip not installed ones if requested + if (InstalledOnly && ( + (pkg->CurrentVer == 0 && P.Mode != ModeInstall) || + (pkg->CurrentVer != 0 && P.Mode == ModeDelete))) + continue; + if(debug_autoremove) + std::clog << "Writing new AutoInstall: " << APT::PrettyPkg(this, pkg) << std::endl; + std::string stanza = "Package: "; + stanza.append(pkg.Name()) + .append("\nArchitecture: ").append(pkg.Arch()) + .append("\nAuto-Installed: 1\n\n"); + if (OutFile.Write(stanza.c_str(), stanza.length()) == false) + return false; + } + } + if (StateFile.Failed()) + { + OutFile.OpFail(); + return false; + } + if (OutFile.Close() == false) + return false; + chmod(state.c_str(), 0644); + return true; +} + /*}}}*/ +// DepCache::CheckDep - Checks a single dependency /*{{{*/ +// --------------------------------------------------------------------- +/* This first checks the dependency against the main target package and + then walks along the package provides list and checks if each provides + will be installed then checks the provides against the dep. Res will be + set to the package which was used to satisfy the dep. */ +bool pkgDepCache::CheckDep(DepIterator const &Dep,int const Type,PkgIterator &Res) +{ + Res = Dep.TargetPkg(); + + /* Check simple depends. A depends -should- never self match but + we allow it anyhow because dpkg does. Technically it is a packaging + bug. Conflicts may never self match */ + if (Dep.IsIgnorable(Res) == false) + { + // Check the base package + if (Type == NowVersion) + { + if (Res->CurrentVer != 0 && Dep.IsSatisfied(Res.CurrentVer()) == true) + return true; + } + else if (Type == InstallVersion) + { + if (PkgState[Res->ID].InstallVer != 0 && + Dep.IsSatisfied(PkgState[Res->ID].InstVerIter(*this)) == true) + return true; + } + else if (Type == CandidateVersion) + if (PkgState[Res->ID].CandidateVer != 0 && + Dep.IsSatisfied(PkgState[Res->ID].CandidateVerIter(*this)) == true) + return true; + } + + if (Dep->Type == Dep::Obsoletes) + return false; + + // Check the providing packages + PrvIterator P = Dep.TargetPkg().ProvidesList(); + for (; P.end() != true; ++P) + { + if (Dep.IsIgnorable(P) == true) + continue; + + // Check if the provides is a hit + if (Type == NowVersion) + { + if (P.OwnerPkg().CurrentVer() != P.OwnerVer()) + continue; + } + else if (Type == InstallVersion) + { + StateCache &State = PkgState[P.OwnerPkg()->ID]; + if (State.InstallVer != (Version *)P.OwnerVer()) + continue; + } + else if (Type == CandidateVersion) + { + StateCache &State = PkgState[P.OwnerPkg()->ID]; + if (State.CandidateVer != (Version *)P.OwnerVer()) + continue; + } + + // Compare the versions. + if (Dep.IsSatisfied(P) == true) + { + Res = P.OwnerPkg(); + return true; + } + } + + return false; +} + /*}}}*/ +// DepCache::AddSizes - Add the packages sizes to the counters /*{{{*/ +// --------------------------------------------------------------------- +/* Call with Inverse = true to perform the inverse operation */ +void pkgDepCache::AddSizes(const PkgIterator &Pkg, bool const Inverse) +{ + StateCache &P = PkgState[Pkg->ID]; + + if (Pkg->VersionList == 0) + return; + + if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && + P.Keep() == true) + return; + + // Compute the size data + if (P.NewInstall() == true) + { + if (Inverse == false) { + iUsrSize += P.InstVerIter(*this)->InstalledSize; + iDownloadSize += P.InstVerIter(*this)->Size; + } else { + iUsrSize -= P.InstVerIter(*this)->InstalledSize; + iDownloadSize -= P.InstVerIter(*this)->Size; + } + return; + } + + // Upgrading + if (Pkg->CurrentVer != 0 && + (P.InstallVer != (Version *)Pkg.CurrentVer() || + (P.iFlags & ReInstall) == ReInstall) && P.InstallVer != 0) + { + if (Inverse == false) { + iUsrSize -= Pkg.CurrentVer()->InstalledSize; + iUsrSize += P.InstVerIter(*this)->InstalledSize; + iDownloadSize += P.InstVerIter(*this)->Size; + } else { + iUsrSize -= P.InstVerIter(*this)->InstalledSize; + iUsrSize += Pkg.CurrentVer()->InstalledSize; + iDownloadSize -= P.InstVerIter(*this)->Size; + } + return; + } + + // Reinstall + if (Pkg.State() == pkgCache::PkgIterator::NeedsUnpack && + P.Delete() == false) + { + if (Inverse == false) + iDownloadSize += P.InstVerIter(*this)->Size; + else + iDownloadSize -= P.InstVerIter(*this)->Size; + return; + } + + // Removing + if (Pkg->CurrentVer != 0 && P.InstallVer == 0) + { + if (Inverse == false) + iUsrSize -= Pkg.CurrentVer()->InstalledSize; + else + iUsrSize += Pkg.CurrentVer()->InstalledSize; + return; + } +} + /*}}}*/ +// DepCache::AddStates - Add the package to the state counter /*{{{*/ +// --------------------------------------------------------------------- +/* This routine is tricky to use, you must make sure that it is never + called twice for the same package. This means the Remove/Add section + should be as short as possible and not encompass any code that will + call Remove/Add itself. Remember, dependencies can be circular so + while processing a dep for Pkg it is possible that Add/Remove + will be called on Pkg */ +void pkgDepCache::AddStates(const PkgIterator &Pkg, bool const Invert) +{ + signed char const Add = (Invert == false) ? 1 : -1; + StateCache &State = PkgState[Pkg->ID]; + + // The Package is broken (either minimal dep or policy dep) + if ((State.DepState & DepInstMin) != DepInstMin) + iBrokenCount += Add; + if ((State.DepState & DepInstPolicy) != DepInstPolicy) + iPolicyBrokenCount += Add; + + // Bad state + if (Pkg.State() != PkgIterator::NeedsNothing) + iBadCount += Add; + + // Not installed + if (Pkg->CurrentVer == 0) + { + if (State.Mode == ModeDelete && + (State.iFlags & Purge) == Purge && Pkg.Purge() == false) + iDelCount += Add; + + if (State.Mode == ModeInstall) + iInstCount += Add; + return; + } + + // Installed, no upgrade + if (State.Status == 0) + { + if (State.Mode == ModeDelete) + iDelCount += Add; + else + if ((State.iFlags & ReInstall) == ReInstall) + iInstCount += Add; + return; + } + + // Alll 3 are possible + if (State.Mode == ModeDelete) + iDelCount += Add; + else if (State.Mode == ModeKeep) + iKeepCount += Add; + else if (State.Mode == ModeInstall) + iInstCount += Add; +} + /*}}}*/ +// DepCache::BuildGroupOrs - Generate the Or group dep data /*{{{*/ +// --------------------------------------------------------------------- +/* The or group results are stored in the last item of the or group. This + allows easy detection of the state of a whole or'd group. */ +void pkgDepCache::BuildGroupOrs(VerIterator const &V) +{ + unsigned char Group = 0; + for (DepIterator D = V.DependsList(); D.end() != true; ++D) + { + // Build the dependency state. + unsigned char &State = DepState[D->ID]; + + /* Invert for Conflicts. We have to do this twice to get the + right sense for a conflicts group */ + if (D.IsNegative() == true) + State = ~State; + + // Add to the group if we are within an or.. + State &= 0x7; + Group |= State; + State |= Group << 3; + if ((D->CompareOp & Dep::Or) != Dep::Or) + Group = 0; + + // Invert for Conflicts + if (D.IsNegative() == true) + State = ~State; + } +} + /*}}}*/ +// DepCache::VersionState - Perform a pass over a dependency list /*{{{*/ +// --------------------------------------------------------------------- +/* This is used to run over a dependency list and determine the dep + state of the list, filtering it through both a Min check and a Policy + check. The return result will have SetMin/SetPolicy low if a check + fails. It uses the DepState cache for it's computations. */ +unsigned char pkgDepCache::VersionState(DepIterator D, unsigned char const Check, + unsigned char const SetMin, + unsigned char const SetPolicy) const +{ + unsigned char Dep = 0xFF; + while (D.end() != true) + { + // the last or-dependency has the state of all previous or'ed + DepIterator Start, End; + D.GlobOr(Start, End); + // ignore if we are called with Dep{Install,…} or DepG{Install,…} + // the later would be more correct, but the first is what we get + unsigned char const State = DepState[End->ID] | (DepState[End->ID] >> 3); + + // Minimum deps that must be satisfied to have a working package + if (Start.IsCritical() == true) + { + if ((State & Check) != Check) + return Dep &= ~(SetMin | SetPolicy); + } + // Policy deps that must be satisfied to install the package + else if (IsImportantDep(Start) == true && + (State & Check) != Check) + Dep &= ~SetPolicy; + } + return Dep; +} + /*}}}*/ +// DepCache::DependencyState - Compute the 3 results for a dep /*{{{*/ +// --------------------------------------------------------------------- +/* This is the main dependency computation bit. It computes the 3 main + results for a dependency: Now, Install and Candidate. Callers must + invert the result if dealing with conflicts. */ +unsigned char pkgDepCache::DependencyState(DepIterator const &D) +{ + unsigned char State = 0; + + if (CheckDep(D,NowVersion) == true) + State |= DepNow; + if (CheckDep(D,InstallVersion) == true) + State |= DepInstall; + if (CheckDep(D,CandidateVersion) == true) + State |= DepCVer; + + return State; +} + /*}}}*/ +// DepCache::UpdateVerState - Compute the Dep member of the state /*{{{*/ +// --------------------------------------------------------------------- +/* This determines the combined dependency representation of a package + for its two states now and install. This is done by using the pre-generated + dependency information. */ +void pkgDepCache::UpdateVerState(PkgIterator const &Pkg) +{ + // Empty deps are always true + StateCache &State = PkgState[Pkg->ID]; + State.DepState = 0xFF; + + // Check the Current state + if (Pkg->CurrentVer != 0) + { + DepIterator D = Pkg.CurrentVer().DependsList(); + State.DepState &= VersionState(D,DepNow,DepNowMin,DepNowPolicy); + } + + /* Check the candidate state. We do not compare against the whole as + a candidate state but check the candidate version against the + install states */ + if (State.CandidateVer != 0) + { + DepIterator D = State.CandidateVerIter(*this).DependsList(); + State.DepState &= VersionState(D,DepInstall,DepCandMin,DepCandPolicy); + } + + // Check target state which can only be current or installed + if (State.InstallVer != 0) + { + DepIterator D = State.InstVerIter(*this).DependsList(); + State.DepState &= VersionState(D,DepInstall,DepInstMin,DepInstPolicy); + } +} + /*}}}*/ +// DepCache::Update - Figure out all the state information /*{{{*/ +// --------------------------------------------------------------------- +/* This will figure out the state of all the packages and all the + dependencies based on the current policy. */ +void pkgDepCache::Update(OpProgress * const Prog) +{ + iUsrSize = 0; + iDownloadSize = 0; + iInstCount = 0; + iDelCount = 0; + iKeepCount = 0; + iBrokenCount = 0; + iPolicyBrokenCount = 0; + iBadCount = 0; + + // Perform the depends pass + int Done = 0; + for (PkgIterator I = PkgBegin(); I.end() != true; ++I, ++Done) + { + if (Prog != 0 && Done%20 == 0) + Prog->Progress(Done); + for (VerIterator V = I.VersionList(); V.end() != true; ++V) + { + unsigned char Group = 0; + + for (DepIterator D = V.DependsList(); D.end() != true; ++D) + { + // Build the dependency state. + unsigned char &State = DepState[D->ID]; + State = DependencyState(D); + + // Add to the group if we are within an or.. + Group |= State; + State |= Group << 3; + if ((D->CompareOp & Dep::Or) != Dep::Or) + Group = 0; + + // Invert for Conflicts + if (D.IsNegative() == true) + State = ~State; + } + } + + // Compute the package dependency state and size additions + AddSizes(I); + UpdateVerState(I); + AddStates(I); + } + + if (Prog != 0) + Prog->Progress(Done); + + readStateFile(Prog); +} + /*}}}*/ +// DepCache::Update - Update the deps list of a package /*{{{*/ +// --------------------------------------------------------------------- +/* This is a helper for update that only does the dep portion of the scan. + It is mainly meant to scan reverse dependencies. */ +void pkgDepCache::Update(DepIterator D) +{ + // Update the reverse deps + for (;D.end() != true; ++D) + { + unsigned char &State = DepState[D->ID]; + State = DependencyState(D); + + // Invert for Conflicts + if (D.IsNegative() == true) + State = ~State; + + RemoveStates(D.ParentPkg()); + BuildGroupOrs(D.ParentVer()); + UpdateVerState(D.ParentPkg()); + AddStates(D.ParentPkg()); + } +} + /*}}}*/ +// DepCache::Update - Update the related deps of a package /*{{{*/ +// --------------------------------------------------------------------- +/* This is called whenever the state of a package changes. It updates + all cached dependencies related to this package. */ +void pkgDepCache::Update(PkgIterator const &Pkg) +{ + // Recompute the dep of the package + RemoveStates(Pkg); + UpdateVerState(Pkg); + AddStates(Pkg); + + // Update the reverse deps + Update(Pkg.RevDependsList()); + + // Update the provides map for the current ver + if (Pkg->CurrentVer != 0) + for (PrvIterator P = Pkg.CurrentVer().ProvidesList(); + P.end() != true; ++P) + Update(P.ParentPkg().RevDependsList()); + + // Update the provides map for the candidate ver + if (PkgState[Pkg->ID].CandidateVer != 0) + for (PrvIterator P = PkgState[Pkg->ID].CandidateVerIter(*this).ProvidesList(); + P.end() != true; ++P) + Update(P.ParentPkg().RevDependsList()); +} + /*}}}*/ +// DepCache::MarkKeep - Put the package in the keep state /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgDepCache::MarkKeep(PkgIterator const &Pkg, bool Soft, bool FromUser, + unsigned long Depth) +{ + if (IsModeChangeOk(ModeKeep, Pkg, Depth, FromUser) == false) + return false; + + /* Reject an attempt to keep a non-source broken installed package, those + must be upgraded */ + if (Pkg.State() == PkgIterator::NeedsUnpack && + Pkg.CurrentVer().Downloadable() == false) + return false; + + /* We changed the soft state all the time so the UI is a bit nicer + to use */ + StateCache &P = PkgState[Pkg->ID]; + + // Check that it is not already kept + if (P.Mode == ModeKeep) + return true; + + if (Soft == true) + P.iFlags |= AutoKept; + else + P.iFlags &= ~AutoKept; + + ActionGroup group(*this); + +#if 0 // resetting the autoflag here means we lose the + // auto-mark information if a user selects a package for removal + // but changes his mind then and sets it for keep again + // - this makes sense as default when all Garbage dependencies + // are automatically marked for removal (as aptitude does). + // setting a package for keep then makes it no longer autoinstalled + // for all other use-case this action is rather surprising + if(FromUser && !P.Marked) + P.Flags &= ~Flag::Auto; +#endif + + if (DebugMarker == true) + std::clog << OutputInDepth(Depth) << "MarkKeep " << APT::PrettyPkg(this, Pkg) << " FU=" << FromUser << std::endl; + + RemoveSizes(Pkg); + RemoveStates(Pkg); + + P.Mode = ModeKeep; + if (Pkg->CurrentVer == 0) + P.InstallVer = 0; + else + P.InstallVer = Pkg.CurrentVer(); + + AddStates(Pkg); + Update(Pkg); + AddSizes(Pkg); + + return true; +} + /*}}}*/ +// DepCache::MarkDelete - Put the package in the delete state /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge, + unsigned long Depth, bool FromUser) +{ + if (IsModeChangeOk(ModeDelete, Pkg, Depth, FromUser) == false) + return false; + + StateCache &P = PkgState[Pkg->ID]; + + // Check that it is not already marked for delete + if ((P.Mode == ModeDelete || P.InstallVer == 0) && + (Pkg.Purge() == true || rPurge == false)) + return true; + + // check if we are allowed to remove the package + if (IsDeleteOk(Pkg,rPurge,Depth,FromUser) == false) + return false; + + P.iFlags &= ~(AutoKept | Purge); + if (rPurge == true) + P.iFlags |= Purge; + + ActionGroup group(*this); + + if (FromUser == false) + { + VerIterator const PV = P.InstVerIter(*this); + if (PV.end() == false) + { + // removed metapackages mark their dependencies as manual to prevent in "desktop depends browser, texteditor" + // the removal of browser to suggest the removal of desktop and texteditor. + // We ignore the auto-bit here as we can't deal with metapackage cascardes otherwise. + // We do not check for or-groups here as we don't know which package takes care of + // providing the feature the user likes e.g.: browser1 | browser2 | browser3 + // Temporary removals are effected by this as well, which is bad, but unlikely in practice + bool const PinNeverMarkAutoSection = (PV->Section != 0 && ConfigValueInSubTree("APT::Never-MarkAuto-Sections", PV.Section())); + if (PinNeverMarkAutoSection) + { + for (DepIterator D = PV.DependsList(); D.end() != true; ++D) + { + if (D.IsMultiArchImplicit() == true || D.IsNegative() == true || IsImportantDep(D) == false) + continue; + + pkgCacheFile CacheFile(this); + APT::VersionList verlist = APT::VersionList::FromDependency(CacheFile, D, APT::CacheSetHelper::INSTALLED); + for (auto const &V : verlist) + { + PkgIterator const DP = V.ParentPkg(); + if(DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "Setting " << DP.FullName(false) << " NOT as auto-installed (direct " + << D.DepType() << " of " << Pkg.FullName(false) << " which is in APT::Never-MarkAuto-Sections)" << std::endl; + + MarkAuto(DP, false); + } + } + } + } + } + + if (DebugMarker == true) + std::clog << OutputInDepth(Depth) << (rPurge ? "MarkPurge " : "MarkDelete ") << APT::PrettyPkg(this, Pkg) << " FU=" << FromUser << std::endl; + + RemoveSizes(Pkg); + RemoveStates(Pkg); + + if (Pkg->CurrentVer == 0 && (Pkg.Purge() == true || rPurge == false)) + P.Mode = ModeKeep; + else + P.Mode = ModeDelete; + P.InstallVer = 0; + + AddStates(Pkg); + Update(Pkg); + AddSizes(Pkg); + + return true; +} + /*}}}*/ +// DepCache::IsDeleteOk - check if it is ok to remove this package /*{{{*/ +// --------------------------------------------------------------------- +/* The default implementation tries to prevent deletion of install requests. + dpkg holds are enforced by the private IsModeChangeOk */ +bool pkgDepCache::IsDeleteOk(PkgIterator const &Pkg,bool rPurge, + unsigned long Depth, bool FromUser) +{ + return IsDeleteOkProtectInstallRequests(Pkg, rPurge, Depth, FromUser); +} +bool pkgDepCache::IsDeleteOkProtectInstallRequests(PkgIterator const &Pkg, + bool const /*rPurge*/, unsigned long const Depth, bool const FromUser) +{ + if (FromUser == false && Pkg->CurrentVer == 0) + { + StateCache &P = PkgState[Pkg->ID]; + if (P.InstallVer != 0 && P.Status == 2 && (P.Flags & Flag::Auto) != Flag::Auto) + { + if (DebugMarker == true) + std::clog << OutputInDepth(Depth) << "Manual install request prevents MarkDelete of " << APT::PrettyPkg(this, Pkg) << std::endl; + return false; + } + } + return true; +} + /*}}}*/ +// DepCache::IsModeChangeOk - check if it is ok to change the mode /*{{{*/ +// --------------------------------------------------------------------- +/* this is used by all Mark methods on the very first line to check sanity + and prevents mode changes for packages on hold for example. + If you want to check Mode specific stuff you can use the virtual public + Is<Mode>Ok methods instead */ +static char const* PrintMode(char const mode) +{ + switch (mode) + { + case pkgDepCache::ModeInstall: return "Install"; + case pkgDepCache::ModeKeep: return "Keep"; + case pkgDepCache::ModeDelete: return "Delete"; + case pkgDepCache::ModeGarbage: return "Garbage"; + default: return "UNKNOWN"; + } +} +bool pkgDepCache::IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg, + unsigned long const Depth, bool const FromUser) +{ + // we are not trying to hard… + if (unlikely(Depth > 100)) + return false; + + // general sanity + if (unlikely(Pkg.end() == true || Pkg->VersionList == 0)) + return false; + + // the user is always right + if (FromUser == true) + return true; + + StateCache &P = PkgState[Pkg->ID]; + // not changing the mode is obviously also fine as we might want to call + // e.g. MarkInstall multiple times with different arguments for the same package + if (P.Mode == mode) + return true; + + // if previous state was set by user only user can reset it + if ((P.iFlags & Protected) == Protected) + { + if (unlikely(DebugMarker == true)) + std::clog << OutputInDepth(Depth) << "Ignore Mark" << PrintMode(mode) + << " of " << APT::PrettyPkg(this, Pkg) << " as its mode (" << PrintMode(P.Mode) + << ") is protected" << std::endl; + return false; + } + // enforce dpkg holds + else if (mode != ModeKeep && Pkg->SelectedState == pkgCache::State::Hold && + _config->FindB("APT::Ignore-Hold",false) == false) + { + if (unlikely(DebugMarker == true)) + std::clog << OutputInDepth(Depth) << "Hold prevents Mark" << PrintMode(mode) + << " of " << APT::PrettyPkg(this, Pkg) << std::endl; + return false; + } + + return true; +} + /*}}}*/ +// DepCache::MarkInstall - Put the package in the install state /*{{{*/ +// --------------------------------------------------------------------- +/* */ +struct CompareProviders { + pkgCache::PkgIterator const Pkg; + explicit CompareProviders(pkgCache::DepIterator const &Dep) : Pkg(Dep.TargetPkg()) {}; + //bool operator() (APT::VersionList::iterator const &AV, APT::VersionList::iterator const &BV) + bool operator() (pkgCache::VerIterator const &AV, pkgCache::VerIterator const &BV) + { + pkgCache::PkgIterator const A = AV.ParentPkg(); + pkgCache::PkgIterator const B = BV.ParentPkg(); + // Prefer MA:same packages if other architectures for it are installed + if ((AV->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same || + (BV->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same) + { + bool instA = false; + if ((AV->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same) + { + pkgCache::GrpIterator Grp = A.Group(); + for (pkgCache::PkgIterator P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P)) + if (P->CurrentVer != 0) + { + instA = true; + break; + } + } + bool instB = false; + if ((BV->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same) + { + pkgCache::GrpIterator Grp = B.Group(); + for (pkgCache::PkgIterator P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P)) + { + if (P->CurrentVer != 0) + { + instB = true; + break; + } + } + } + if (instA != instB) + return instA == false; + } + if ((A->CurrentVer == 0 || B->CurrentVer == 0) && A->CurrentVer != B->CurrentVer) + return A->CurrentVer == 0; + // Prefer packages in the same group as the target; e.g. foo:i386, foo:amd64 + if (A->Group != B->Group) + { + if (A->Group == Pkg->Group && B->Group != Pkg->Group) + return false; + else if (B->Group == Pkg->Group && A->Group != Pkg->Group) + return true; + } + // we like essentials + if ((A->Flags & pkgCache::Flag::Essential) != (B->Flags & pkgCache::Flag::Essential)) + { + if ((A->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential) + return false; + else if ((B->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential) + return true; + } + if ((A->Flags & pkgCache::Flag::Important) != (B->Flags & pkgCache::Flag::Important)) + { + if ((A->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important) + return false; + else if ((B->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important) + return true; + } + // prefer native architecture + if (strcmp(A.Arch(), B.Arch()) != 0) + { + if (strcmp(A.Arch(), A.Cache()->NativeArch()) == 0) + return false; + else if (strcmp(B.Arch(), B.Cache()->NativeArch()) == 0) + return true; + std::vector<std::string> archs = APT::Configuration::getArchitectures(); + for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a) + if (*a == A.Arch()) + return false; + else if (*a == B.Arch()) + return true; + } + // higher priority seems like a good idea + if (AV->Priority != BV->Priority) + return AV->Priority > BV->Priority; + // unable to decide… + return A->ID < B->ID; + } +}; +bool pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst, + unsigned long Depth, bool FromUser, + bool ForceImportantDeps) +{ + if (IsModeChangeOk(ModeInstall, Pkg, Depth, FromUser) == false) + return false; + + StateCache &P = PkgState[Pkg->ID]; + + // See if there is even any possible installation candidate + if (P.CandidateVer == 0) + return false; + + /* Check that it is not already marked for install and that it can be + installed */ + if ((P.InstPolicyBroken() == false && P.InstBroken() == false) && + (P.Mode == ModeInstall || + P.CandidateVer == (Version *)Pkg.CurrentVer())) + { + if (P.CandidateVer == (Version *)Pkg.CurrentVer() && P.InstallVer == 0) + return MarkKeep(Pkg, false, FromUser, Depth+1); + return true; + } + + // check if we are allowed to install the package + if (IsInstallOk(Pkg,AutoInst,Depth,FromUser) == false) + return false; + + ActionGroup group(*this); + P.iFlags &= ~AutoKept; + + /* Target the candidate version and remove the autoflag. We reset the + autoflag below if this was called recursively. Otherwise the user + should have the ability to de-auto a package by changing its state */ + RemoveSizes(Pkg); + RemoveStates(Pkg); + + P.Mode = ModeInstall; + P.InstallVer = P.CandidateVer; + + if(FromUser) + { + // Set it to manual if it's a new install or already installed, + // but only if its not marked by the autoremover (aptitude depend on this behavior) + // or if we do automatic installation (aptitude never does it) + if(P.Status == 2 || (Pkg->CurrentVer != 0 && (AutoInst == true || P.Marked == false))) + P.Flags &= ~Flag::Auto; + } + else + { + // Set it to auto if this is a new install. + if(P.Status == 2) + P.Flags |= Flag::Auto; + } + if (P.CandidateVer == (Version *)Pkg.CurrentVer()) + P.Mode = ModeKeep; + + AddStates(Pkg); + Update(Pkg); + AddSizes(Pkg); + + if (AutoInst == false || _config->Find("APT::Solver", "internal") != "internal") + return true; + + if (DebugMarker == true) + std::clog << OutputInDepth(Depth) << "MarkInstall " << APT::PrettyPkg(this, Pkg) << " FU=" << FromUser << std::endl; + + bool MoveAutoBitToDependencies = false; + VerIterator const PV = P.InstVerIter(*this); + if (unlikely(PV.end() == true)) + return false; + else if (PV->Section != 0 && (P.Flags & Flag::Auto) != Flag::Auto) + { + VerIterator const CurVer = Pkg.CurrentVer(); + if (CurVer.end() == false && CurVer->Section != 0 && strcmp(CurVer.Section(), PV.Section()) != 0) + { + bool const CurVerInMoveSection = ConfigValueInSubTree("APT::Move-Autobit-Sections", CurVer.Section()); + bool const InstVerInMoveSection = ConfigValueInSubTree("APT::Move-Autobit-Sections", PV.Section()); + MoveAutoBitToDependencies = (CurVerInMoveSection == false && InstVerInMoveSection == true); + if (MoveAutoBitToDependencies == true) + { + if(DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "Setting " << Pkg.FullName(false) << " as auto-installed, moving manual to its dependencies" << std::endl; + MarkAuto(Pkg, true); + } + } + } + + DepIterator Dep = PV.DependsList(); + for (; Dep.end() != true;) + { + // Grok or groups + DepIterator Start = Dep; + bool Result = true; + unsigned Ors = 0; + for (bool LastOR = true; Dep.end() == false && LastOR == true; ++Dep, ++Ors) + { + LastOR = (Dep->CompareOp & Dep::Or) == Dep::Or; + + if ((DepState[Dep->ID] & DepInstall) == DepInstall) + Result = false; + } + + // Dep is satisfied okay. + if (Result == false) + continue; + + /* Check if this dep should be consider for install. If it is a user + defined important dep and we are installed a new package then + it will be installed. Otherwise we only check for important + deps that have changed from the installed version */ + if (IsImportantDep(Start) == false) + continue; + + /* If we are in an or group locate the first or that can + succeed. We have already cached this… */ + for (; Ors > 1 && (DepState[Start->ID] & DepCVer) != DepCVer; --Ors) + ++Start; + + /* unsatisfiable dependency: IsInstallOkDependenciesSatisfiableByCandidates + would have prevented us to get here if not overridden, so just skip + over the problem here as the front-end will know what it is doing */ + if (Ors == 1 && (DepState[Start->ID] &DepCVer) != DepCVer && Start.IsNegative() == false) + continue; + + /* Check if any ImportantDep() (but not Critical) were added + * since we installed the package. Also check for deps that + * were satisfied in the past: for instance, if a version + * restriction in a Recommends was tightened, upgrading the + * package should follow that Recommends rather than causing the + * dependency to be removed. (bug #470115) + */ + if (Pkg->CurrentVer != 0 && ForceImportantDeps == false && Start.IsCritical() == false) + { + bool isNewImportantDep = true; + bool isPreviouslySatisfiedImportantDep = false; + for (DepIterator D = Pkg.CurrentVer().DependsList(); D.end() != true; ++D) + { + //FIXME: Should we handle or-group better here? + // We do not check if the package we look for is part of the same or-group + // we might find while searching, but could that really be a problem? + if (D.IsCritical() == true || IsImportantDep(D) == false || + Start.TargetPkg() != D.TargetPkg()) + continue; + + isNewImportantDep = false; + + while ((D->CompareOp & Dep::Or) != 0) + ++D; + + isPreviouslySatisfiedImportantDep = (((*this)[D] & DepGNow) != 0); + if (isPreviouslySatisfiedImportantDep == true) + break; + } + + if(isNewImportantDep == true) + { + if (DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "new important dependency: " + << Start.TargetPkg().FullName() << std::endl; + } + else if(isPreviouslySatisfiedImportantDep == true) + { + if (DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "previously satisfied important dependency on " + << Start.TargetPkg().FullName() << std::endl; + } + else + { + if (DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "ignore old unsatisfied important dependency on " + << Start.TargetPkg().FullName() << std::endl; + continue; + } + } + + /* This bit is for processing the possibility of an install/upgrade + fixing the problem for "positive" dependencies */ + if (Start.IsNegative() == false && (DepState[Start->ID] & DepCVer) == DepCVer) + { + pkgCacheFile CacheFile(this); + APT::VersionList verlist = APT::VersionList::FromDependency(CacheFile, Start, APT::CacheSetHelper::CANDIDATE); + CompareProviders comp(Start); + + do { + APT::VersionList::iterator InstVer = std::max_element(verlist.begin(), verlist.end(), comp); + + if (InstVer == verlist.end()) + break; + + pkgCache::PkgIterator InstPkg = InstVer.ParentPkg(); + if(DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "Installing " << InstPkg.Name() + << " as " << Start.DepType() << " of " << Pkg.Name() + << std::endl; + if (MarkInstall(InstPkg, true, Depth + 1, false, ForceImportantDeps) == false) + { + verlist.erase(InstVer); + continue; + } + + // now check if we should consider it a automatic dependency or not + if(InstPkg->CurrentVer == 0 && MoveAutoBitToDependencies) + { + if(DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << "Setting " << InstPkg.FullName(false) << " NOT as auto-installed (direct " + << Start.DepType() << " of " << Pkg.FullName(false) << " which is manual and in APT::Move-Autobit-Sections)" << std::endl; + MarkAuto(InstPkg, false); + } + + + break; + } while(true); + continue; + } + /* Negative dependencies have no or-group + If the dependency isn't versioned, we try if an upgrade might solve the problem. + Otherwise we remove the offender if needed */ + else if (Start.IsNegative() == true && Start->Type != pkgCache::Dep::Obsoletes) + { + std::unique_ptr<Version *[]> List(Start.AllTargets()); + pkgCache::PkgIterator TrgPkg = Start.TargetPkg(); + for (Version **I = List.get(); *I != 0; I++) + { + VerIterator Ver(*this,*I); + PkgIterator Pkg = Ver.ParentPkg(); + + /* The List includes all packages providing this dependency, + even providers which are not installed, so skip them. */ + if (PkgState[Pkg->ID].InstallVer == 0) + continue; + + /* Ignore negative dependencies that we are not going to + get installed */ + if (PkgState[Pkg->ID].InstallVer != *I) + continue; + + if ((Start->Version != 0 || TrgPkg != Pkg) && + PkgState[Pkg->ID].CandidateVer != PkgState[Pkg->ID].InstallVer && + PkgState[Pkg->ID].CandidateVer != *I && + MarkInstall(Pkg,true,Depth + 1, false, ForceImportantDeps) == true) + continue; + else if (Start->Type == pkgCache::Dep::Conflicts || + Start->Type == pkgCache::Dep::DpkgBreaks) + { + if(DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) + << " Removing: " << Pkg.Name() + << std::endl; + if (MarkDelete(Pkg,false,Depth + 1, false) == false) + break; + } + } + continue; + } + } + + return Dep.end() == true; +} + /*}}}*/ +// DepCache::IsInstallOk - check if it is ok to install this package /*{{{*/ +// --------------------------------------------------------------------- +/* The default implementation checks if the installation of an M-A:same + package would lead us into a version-screw and if so forbids it. + dpkg holds are enforced by the private IsModeChangeOk */ +bool pkgDepCache::IsInstallOk(PkgIterator const &Pkg,bool AutoInst, + unsigned long Depth, bool FromUser) +{ + return IsInstallOkMultiArchSameVersionSynced(Pkg,AutoInst, Depth, FromUser) && + IsInstallOkDependenciesSatisfiableByCandidates(Pkg,AutoInst, Depth, FromUser); +} +bool pkgDepCache::IsInstallOkMultiArchSameVersionSynced(PkgIterator const &Pkg, + bool const /*AutoInst*/, unsigned long const Depth, bool const FromUser) +{ + if (FromUser == true) // as always: user is always right + return true; + + // if we have checked before and it was okay, it will still be okay + if (PkgState[Pkg->ID].Mode == ModeInstall && + PkgState[Pkg->ID].InstallVer == PkgState[Pkg->ID].CandidateVer) + return true; + + // ignore packages with none-M-A:same candidates + VerIterator const CandVer = PkgState[Pkg->ID].CandidateVerIter(*this); + if (unlikely(CandVer.end() == true) || CandVer == Pkg.CurrentVer() || + (CandVer->MultiArch & pkgCache::Version::Same) != pkgCache::Version::Same) + return true; + + GrpIterator const Grp = Pkg.Group(); + for (PkgIterator P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P)) + { + // not installed or self-check: fine by definition + if (P->CurrentVer == 0 || P == Pkg) + continue; + + // not having a candidate or being in sync + // (simple string-compare as stuff like '1' == '0:1-0' can't happen here) + VerIterator CV = PkgState[P->ID].CandidateVerIter(*this); + if (CV.end() == true || strcmp(CandVer.VerStr(), CV.VerStr()) == 0) + continue; + + // packages losing M-A:same can be out-of-sync + if ((CV->MultiArch & pkgCache::Version::Same) != pkgCache::Version::Same) + continue; + + // not downloadable means the package is obsolete, so allow out-of-sync + if (CV.Downloadable() == false) + continue; + + PkgState[Pkg->ID].iFlags |= AutoKept; + if (unlikely(DebugMarker == true)) + std::clog << OutputInDepth(Depth) << "Ignore MarkInstall of " << APT::PrettyPkg(this, Pkg) + << " as it is not in sync with its M-A:same sibling " << APT::PrettyPkg(this, P) + << " (" << CandVer.VerStr() << " != " << CV.VerStr() << ")" << std::endl; + return false; + } + + return true; +} +bool pkgDepCache::IsInstallOkDependenciesSatisfiableByCandidates(PkgIterator const &Pkg, + bool const AutoInst, unsigned long const Depth, bool const /*FromUser*/) +{ + if (AutoInst == false) + return true; + + VerIterator const CandVer = PkgState[Pkg->ID].CandidateVerIter(*this); + if (unlikely(CandVer.end() == true) || CandVer == Pkg.CurrentVer()) + return true; + + for (DepIterator Dep = CandVer.DependsList(); Dep.end() != true;) + { + // Grok or groups + DepIterator Start = Dep; + bool Result = true; + unsigned Ors = 0; + for (bool LastOR = true; Dep.end() == false && LastOR == true; ++Dep, ++Ors) + { + LastOR = (Dep->CompareOp & Dep::Or) == Dep::Or; + + if ((DepState[Dep->ID] & DepInstall) == DepInstall) + Result = false; + } + + if (Start.IsCritical() == false || Start.IsNegative() == true || Result == false) + continue; + + /* If we are in an or group locate the first or that can succeed. + We have already cached this… */ + for (; Ors > 1 && (DepState[Start->ID] & DepCVer) != DepCVer; --Ors) + ++Start; + + if (Ors == 1 && (DepState[Start->ID] &DepCVer) != DepCVer) + { + if (DebugAutoInstall == true) + std::clog << OutputInDepth(Depth) << APT::PrettyDep(this, Start) << " can't be satisfied!" << std::endl; + + // the dependency is critical, but can't be installed, so discard the candidate + // as the problemresolver will trip over it otherwise trying to install it (#735967) + if (Pkg->CurrentVer != 0 && (PkgState[Pkg->ID].iFlags & Protected) != Protected) + { + SetCandidateVersion(Pkg.CurrentVer()); + StateCache &State = PkgState[Pkg->ID]; + if (State.Mode != ModeDelete) + { + State.Mode = ModeKeep; + State.Update(Pkg, *this); + } + } + return false; + } + } + + return true; +} + /*}}}*/ +// DepCache::SetReInstall - Set the reinstallation flag /*{{{*/ +// --------------------------------------------------------------------- +/* */ +void pkgDepCache::SetReInstall(PkgIterator const &Pkg,bool To) +{ + if (unlikely(Pkg.end() == true)) + return; + + APT::PackageList pkglist; + if (Pkg->CurrentVer != 0 && + (Pkg.CurrentVer()-> MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same) + { + pkgCache::GrpIterator Grp = Pkg.Group(); + for (pkgCache::PkgIterator P = Grp.PackageList(); P.end() == false; P = Grp.NextPkg(P)) + { + if (P->CurrentVer != 0) + pkglist.insert(P); + } + } + else + pkglist.insert(Pkg); + + ActionGroup group(*this); + + for (APT::PackageList::const_iterator Pkg = pkglist.begin(); Pkg != pkglist.end(); ++Pkg) + { + RemoveSizes(Pkg); + RemoveStates(Pkg); + + StateCache &P = PkgState[Pkg->ID]; + if (To == true) + P.iFlags |= ReInstall; + else + P.iFlags &= ~ReInstall; + + AddStates(Pkg); + AddSizes(Pkg); + } +} + /*}}}*/ +pkgCache::VerIterator pkgDepCache::GetCandidateVersion(PkgIterator const &Pkg)/*{{{*/ +{ + return PkgState[Pkg->ID].CandidateVerIter(*this); +} + /*}}}*/ +// DepCache::SetCandidateVersion - Change the candidate version /*{{{*/ +// --------------------------------------------------------------------- +/* */ +void pkgDepCache::SetCandidateVersion(VerIterator TargetVer) +{ + pkgCache::PkgIterator Pkg = TargetVer.ParentPkg(); + StateCache &P = PkgState[Pkg->ID]; + + if (P.CandidateVer == TargetVer) + return; + + ActionGroup group(*this); + + RemoveSizes(Pkg); + RemoveStates(Pkg); + + if (P.CandidateVer == P.InstallVer && P.Install() == true) + P.InstallVer = (Version *)TargetVer; + P.CandidateVer = (Version *)TargetVer; + P.Update(Pkg,*this); + + AddStates(Pkg); + Update(Pkg); + AddSizes(Pkg); + +} + /*}}}*/ +// DepCache::SetCandidateRelease - Change the candidate version /*{{{*/ +// --------------------------------------------------------------------- +/* changes the candidate of a package and walks over all its dependencies + to check if it needs to change the candidate of the dependency, too, + to reach a installable versionstate */ +bool pkgDepCache::SetCandidateRelease(pkgCache::VerIterator TargetVer, + std::string const &TargetRel) +{ + std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> > Changed; + return SetCandidateRelease(TargetVer, TargetRel, Changed); +} +bool pkgDepCache::SetCandidateRelease(pkgCache::VerIterator TargetVer, + std::string const &TargetRel, + std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> > &Changed) +{ + ActionGroup group(*this); + SetCandidateVersion(TargetVer); + + if (TargetRel == "installed" || TargetRel == "candidate") // both doesn't make sense in this context + return true; + + pkgVersionMatch Match(TargetRel, pkgVersionMatch::Release); + // save the position of the last element we will not undo - if we have to + std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> >::iterator newChanged = --(Changed.end()); + + for (pkgCache::DepIterator D = TargetVer.DependsList(); D.end() == false; ++D) + { + if (D->Type != pkgCache::Dep::PreDepends && D->Type != pkgCache::Dep::Depends && + ((D->Type != pkgCache::Dep::Recommends && D->Type != pkgCache::Dep::Suggests) || + IsImportantDep(D) == false)) + continue; + + // walk over an or-group and check if we need to do anything + // for simpilicity no or-group is handled as a or-group including one dependency + pkgCache::DepIterator Start = D; + bool itsFine = false; + for (bool stillOr = true; stillOr == true; ++Start) + { + stillOr = (Start->CompareOp & Dep::Or) == Dep::Or; + pkgCache::PkgIterator const P = Start.TargetPkg(); + // virtual packages can't be a solution + if (P.end() == true || (P->ProvidesList == 0 && P->VersionList == 0)) + continue; + // if its already installed, check if this one is good enough + pkgCache::VerIterator const Now = P.CurrentVer(); + if (Now.end() == false && Start.IsSatisfied(Now)) + { + itsFine = true; + break; + } + pkgCache::VerIterator const Cand = PkgState[P->ID].CandidateVerIter(*this); + // no versioned dependency - but is it installable? + if (Start.TargetVer() == 0 || Start.TargetVer()[0] == '\0') + { + // Check if one of the providers is installable + if (P->ProvidesList != 0) + { + pkgCache::PrvIterator Prv = P.ProvidesList(); + for (; Prv.end() == false; ++Prv) + { + pkgCache::VerIterator const C = PkgState[Prv.OwnerPkg()->ID].CandidateVerIter(*this); + if (C.end() == true || C != Prv.OwnerVer() || + (VersionState(C.DependsList(), DepInstall, DepCandMin, DepCandPolicy) & DepCandMin) != DepCandMin) + continue; + break; + } + if (Prv.end() == true) + continue; + } + // no providers, so check if we have an installable candidate version + else if (Cand.end() == true || + (VersionState(Cand.DependsList(), DepInstall, DepCandMin, DepCandPolicy) & DepCandMin) != DepCandMin) + continue; + itsFine = true; + break; + } + if (Cand.end() == true) + continue; + // check if the current candidate is enough for the versioned dependency - and installable? + if (Start.IsSatisfied(Cand) == true && + (VersionState(Cand.DependsList(), DepInstall, DepCandMin, DepCandPolicy) & DepCandMin) == DepCandMin) + { + itsFine = true; + break; + } + } + + if (itsFine == true) { + // something in the or-group was fine, skip all other members + for (; (D->CompareOp & Dep::Or) == Dep::Or; ++D); + continue; + } + + // walk again over the or-group and check each if a candidate switch would help + itsFine = false; + for (bool stillOr = true; stillOr == true; ++D) + { + stillOr = (D->CompareOp & Dep::Or) == Dep::Or; + // changing candidate will not help if the dependency is not versioned + if (D.TargetVer() == 0 || D.TargetVer()[0] == '\0') + { + if (stillOr == true) + continue; + break; + } + + pkgCache::VerIterator V; + if (TargetRel == "newest") + V = D.TargetPkg().VersionList(); + else + V = Match.Find(D.TargetPkg()); + + // check if the version from this release could satisfy the dependency + if (V.end() == true || D.IsSatisfied(V) == false) + { + if (stillOr == true) + continue; + break; + } + + pkgCache::VerIterator oldCand = PkgState[D.TargetPkg()->ID].CandidateVerIter(*this); + if (V == oldCand) + { + // Do we already touched this Version? If so, their versioned dependencies are okay, no need to check again + for (std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> >::const_iterator c = Changed.begin(); + c != Changed.end(); ++c) + { + if (c->first->ParentPkg != V->ParentPkg) + continue; + itsFine = true; + break; + } + } + + if (itsFine == false) + { + // change the candidate + Changed.push_back(make_pair(V, TargetVer)); + if (SetCandidateRelease(V, TargetRel, Changed) == false) + { + if (stillOr == false) + break; + // undo the candidate changing + SetCandidateVersion(oldCand); + Changed.pop_back(); + continue; + } + itsFine = true; + } + + // something in the or-group was fine, skip all other members + for (; (D->CompareOp & Dep::Or) == Dep::Or; ++D); + break; + } + + if (itsFine == false && (D->Type == pkgCache::Dep::PreDepends || D->Type == pkgCache::Dep::Depends)) + { + // undo all changes which aren't lead to a solution + for (std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> >::const_iterator c = ++newChanged; + c != Changed.end(); ++c) + SetCandidateVersion(c->first); + Changed.erase(newChanged, Changed.end()); + return false; + } + } + return true; +} + /*}}}*/ +// DepCache::MarkAuto - set the Auto flag for a package /*{{{*/ +// --------------------------------------------------------------------- +/* */ +void pkgDepCache::MarkAuto(const PkgIterator &Pkg, bool Auto) +{ + StateCache &state = PkgState[Pkg->ID]; + + ActionGroup group(*this); + + if(Auto) + state.Flags |= Flag::Auto; + else + state.Flags &= ~Flag::Auto; +} + /*}}}*/ +// StateCache::Update - Compute the various static display things /*{{{*/ +// --------------------------------------------------------------------- +/* This is called whenever the Candidate version changes. */ +void pkgDepCache::StateCache::Update(PkgIterator Pkg,pkgCache &Cache) +{ + // Some info + VerIterator Ver = CandidateVerIter(Cache); + + // Use a null string or the version string + if (Ver.end() == true) + CandVersion = ""; + else + CandVersion = Ver.VerStr(); + + // Find the current version + CurVersion = ""; + if (Pkg->CurrentVer != 0) + CurVersion = Pkg.CurrentVer().VerStr(); + + // Figure out if its up or down or equal + Status = Ver.CompareVer(Pkg.CurrentVer()); + if (Pkg->CurrentVer == 0 || Pkg->VersionList == 0 || CandidateVer == 0) + Status = 2; +} + /*}}}*/ +// StateCache::StripEpoch - Remove the epoch specifier from the version /*{{{*/ +// --------------------------------------------------------------------- +/* */ +const char *pkgDepCache::StateCache::StripEpoch(const char *Ver) +{ + if (Ver == 0) + return 0; + + // Strip any epoch + char const * const I = strchr(Ver, ':'); + if (I == nullptr) + return Ver; + return I + 1; +} + /*}}}*/ +// Policy::GetCandidateVer - Returns the Candidate install version /*{{{*/ +// --------------------------------------------------------------------- +/* The default just returns the highest available version that is not + a source and automatic. */ +pkgCache::VerIterator pkgDepCache::Policy::GetCandidateVer(PkgIterator const &Pkg) +{ + /* Not source/not automatic versions cannot be a candidate version + unless they are already installed */ + VerIterator Last; + + for (VerIterator I = Pkg.VersionList(); I.end() == false; ++I) + { + if (Pkg.CurrentVer() == I) + return I; + + for (VerFileIterator J = I.FileList(); J.end() == false; ++J) + { + if (J.File().Flagged(Flag::NotSource)) + continue; + + /* Stash the highest version of a not-automatic source, we use it + if there is nothing better */ + if (J.File().Flagged(Flag::NotAutomatic) || + J.File().Flagged(Flag::ButAutomaticUpgrades)) + { + if (Last.end() == true) + Last = I; + continue; + } + + return I; + } + } + + return Last; +} + /*}}}*/ +// Policy::IsImportantDep - True if the dependency is important /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgDepCache::Policy::IsImportantDep(DepIterator const &Dep) const +{ + if(Dep.IsCritical()) + return true; + else if(Dep->Type == pkgCache::Dep::Recommends) + { + if (InstallRecommends) + return true; + // we support a special mode to only install-recommends for certain + // sections + // FIXME: this is a meant as a temporary solution until the + // recommends are cleaned up + const char *sec = Dep.ParentVer().Section(); + if (sec && ConfigValueInSubTree("APT::Install-Recommends-Sections", sec)) + return true; + } + else if(Dep->Type == pkgCache::Dep::Suggests) + return InstallSuggests; + + return false; +} + /*}}}*/ +// Policy::GetPriority - Get the priority of the package pin /*{{{*/ +APT_PURE signed short pkgDepCache::Policy::GetPriority(pkgCache::PkgIterator const &/*Pkg*/) +{ return 0; } +APT_PURE signed short pkgDepCache::Policy::GetPriority(pkgCache::VerIterator const &/*Ver*/, bool /*ConsiderFiles*/) +{ return 0; } +APT_PURE signed short pkgDepCache::Policy::GetPriority(pkgCache::PkgFileIterator const &/*File*/) +{ return 0; } + /*}}}*/ +pkgDepCache::InRootSetFunc *pkgDepCache::GetRootSetFunc() /*{{{*/ +{ + DefaultRootSetFunc *f = new DefaultRootSetFunc; + if(f->wasConstructedSuccessfully()) + return f; + else + { + delete f; + return NULL; + } +} + /*}}}*/ +bool pkgDepCache::MarkFollowsRecommends() +{ + return _config->FindB("APT::AutoRemove::RecommendsImportant", true); +} + +bool pkgDepCache::MarkFollowsSuggests() +{ + return _config->FindB("APT::AutoRemove::SuggestsImportant", true); +} + +// pkgDepCache::MarkRequired - the main mark algorithm /*{{{*/ +static bool IsPkgInBoringState(pkgCache::PkgIterator const &Pkg, pkgDepCache::StateCache const * const PkgState) +{ + if (Pkg->CurrentVer == 0) + { + if (PkgState[Pkg->ID].Keep()) + return true; + } + else + { + if (PkgState[Pkg->ID].Delete()) + return true; + } + return false; +} +bool pkgDepCache::MarkRequired(InRootSetFunc &userFunc) +{ + if (_config->Find("APT::Solver", "internal") != "internal") + return true; + + bool const debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false); + + // init the states + auto const PackagesCount = Head().PackageCount; + for(auto i = decltype(PackagesCount){0}; i < PackagesCount; ++i) + { + PkgState[i].Marked = false; + PkgState[i].Garbage = false; + } + if (debug_autoremove) + for(PkgIterator p = PkgBegin(); !p.end(); ++p) + if(PkgState[p->ID].Flags & Flag::Auto) + std::clog << "AutoDep: " << p.FullName() << std::endl; + + bool const follow_recommends = MarkFollowsRecommends(); + bool const follow_suggests = MarkFollowsSuggests(); + + // do the mark part, this is the core bit of the algorithm + for (PkgIterator P = PkgBegin(); !P.end(); ++P) + { + if (PkgState[P->ID].Marked || IsPkgInBoringState(P, PkgState)) + continue; + + const char *reason = nullptr; + + if ((PkgState[P->ID].Flags & Flag::Auto) == 0) + reason = "Manual-Installed"; + else if (P->Flags & Flag::Essential) + reason = "Essential"; + else if (P->Flags & Flag::Important) + reason = "Important"; + else if (P->CurrentVer != 0 && P.CurrentVer()->Priority == pkgCache::State::Required) + reason = "Required"; + else if (userFunc.InRootSet(P)) + reason = "Blacklisted [APT::NeverAutoRemove]"; + else if (IsModeChangeOk(ModeGarbage, P, 0, false) == false) + reason = "Hold"; + else + continue; + + if (PkgState[P->ID].Install()) + MarkPackage(P, PkgState[P->ID].InstVerIter(*this), + follow_recommends, follow_suggests, reason); + else + MarkPackage(P, P.CurrentVer(), + follow_recommends, follow_suggests, reason); + } + + return true; +} + /*}}}*/ +// MarkPackage - mark a single package in Mark-and-Sweep /*{{{*/ +void pkgDepCache::MarkPackage(const pkgCache::PkgIterator &Pkg, + const pkgCache::VerIterator &Ver, + bool const &follow_recommends, + bool const &follow_suggests, + const char *reason) +{ + { + pkgDepCache::StateCache &state = PkgState[Pkg->ID]; + // if we are marked already we are done + if(state.Marked || unlikely(Ver.end())) + return; + state.Marked=true; + } + + if (IsPkgInBoringState(Pkg, PkgState)) + return; + + bool const debug_autoremove = _config->FindB("Debug::pkgAutoRemove", false); + if(debug_autoremove) + std::clog << "Marking: " << Pkg.FullName() << " " << Ver.VerStr() + << " (" << reason << ")" << std::endl; + + for (auto D = Ver.DependsList(); D.end() == false; ++D) + { + auto const T = D.TargetPkg(); + if (PkgState[T->ID].Marked) + continue; + + if (D->Type != Dep::Depends && + D->Type != Dep::PreDepends && + (follow_recommends == false || D->Type != Dep::Recommends) && + (follow_suggests == false || D->Type != Dep::Suggests)) + continue; + + // handle the virtual part first + APT::VersionVector providers; + for(auto Prv = T.ProvidesList(); Prv.end() == false; ++Prv) + { + auto PP = Prv.OwnerPkg(); + if (IsPkgInBoringState(PP, PkgState)) + continue; + + // we want to ignore provides from uninteresting versions + auto const PV = (PkgState[PP->ID].Install()) ? + PkgState[PP->ID].InstVerIter(*this) : PP.CurrentVer(); + if (unlikely(PV.end()) || PV != Prv.OwnerVer() || D.IsSatisfied(Prv) == false) + continue; + + providers.emplace_back(PV); + } + if (providers.empty() == false) + { + // sort providers by source version so that only the latest versioned + // binary package of a source package is marked instead of all + std::sort(providers.begin(), providers.end(), + [](pkgCache::VerIterator const &A, pkgCache::VerIterator const &B) { + auto const nameret = strcmp(A.SourcePkgName(), B.SourcePkgName()); + if (nameret != 0) + return nameret < 0; + auto const verret = A.Cache()->VS->CmpVersion(A.SourceVerStr(), B.SourceVerStr()); + if (verret != 0) + return verret > 0; + return strcmp(A.ParentPkg().Name(), B.ParentPkg().Name()) < 0; + }); + auto const prvsize = providers.size(); + providers.erase(std::unique(providers.begin(), providers.end(), + [](pkgCache::VerIterator const &A, pkgCache::VerIterator const &B) { + return strcmp(A.SourcePkgName(), B.SourcePkgName()) == 0 && + strcmp(A.SourceVerStr(), B.SourceVerStr()) != 0; + }), providers.end()); + for (auto && PV: providers) + { + auto const PP = PV.ParentPkg(); + if (debug_autoremove) + std::clog << "Following dep: " << APT::PrettyDep(this, D) + << ", provided by " << PP.FullName() << " " << PV.VerStr() + << " (" << providers.size() << "/" << prvsize << ")"<< std::endl; + MarkPackage(PP, PV, follow_recommends, follow_suggests, "Provider"); + } + } + + // now deal with the real part of the package + if (IsPkgInBoringState(T, PkgState)) + continue; + + auto const TV = (PkgState[T->ID].Install()) ? + PkgState[T->ID].InstVerIter(*this) : T.CurrentVer(); + if (unlikely(TV.end()) || D.IsSatisfied(TV) == false) + continue; + + if (debug_autoremove) + std::clog << "Following dep: " << APT::PrettyDep(this, D) << std::endl; + MarkPackage(T, TV, follow_recommends, follow_suggests, "Dependency"); + } +} + /*}}}*/ +bool pkgDepCache::Sweep() /*{{{*/ +{ + bool debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false); + + // do the sweep + for(PkgIterator p=PkgBegin(); !p.end(); ++p) + { + StateCache &state=PkgState[p->ID]; + + // skip required packages + if (!p.CurrentVer().end() && + (p.CurrentVer()->Priority == pkgCache::State::Required)) + continue; + + // if it is not marked and it is installed, it's garbage + if(!state.Marked && (!p.CurrentVer().end() || state.Install())) + { + state.Garbage=true; + if(debug_autoremove) + std::clog << "Garbage: " << p.FullName() << std::endl; + } + } + + return true; +} + /*}}}*/ +// DepCache::MarkAndSweep /*{{{*/ +bool pkgDepCache::MarkAndSweep(InRootSetFunc &rootFunc) +{ + return MarkRequired(rootFunc) && Sweep(); +} +bool pkgDepCache::MarkAndSweep() +{ + std::unique_ptr<InRootSetFunc> f(GetRootSetFunc()); + if(f.get() != NULL) + return MarkAndSweep(*f.get()); + else + return false; +} + /*}}}*/ |