// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: depcache.cc,v 1.25 2001/05/27 05:36:04 jgg Exp $ /* ###################################################################### Dependency Cache - Caches Dependency information. ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ #include <apt-pkg/depcache.h> #include <apt-pkg/version.h> #include <apt-pkg/error.h> #include <apt-pkg/sptr.h> #include <apt-pkg/algorithms.h> #include <apt-pkg/fileutl.h> #include <apt-pkg/strutl.h> #include <apt-pkg/configuration.h> #include <apt-pkg/pkgsystem.h> #include <apt-pkg/tagfile.h> #include <iostream> #include <sstream> #include <set> #include <sys/stat.h> #include <apti18n.h> /*}}}*/ // 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) : /*{{{*/ 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 = false; } } pkgDepCache::ActionGroup::~ActionGroup() { release(); } /*}}}*/ // DepCache::pkgDepCache - Constructors /*{{{*/ // --------------------------------------------------------------------- /* */ pkgDepCache::pkgDepCache(pkgCache *pCache,Policy *Plcy) : group_level(0), Cache(pCache), PkgState(0), DepState(0) { 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 *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 = 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 *Prog) /*{{{*/ { FileFd state_file; string state = _config->FindDir("Dir::State") + "extended_states"; if(FileExists(state)) { state_file.Open(state, FileFd::ReadOnly); int file_size = state_file.Size(); if(Prog != NULL) Prog->OverallProgress(0, file_size, 1, _("Reading state information")); pkgTagFile tagfile(&state_file); pkgTagSection section; int amt=0; bool debug_autoremove=_config->FindB("Debug::pkgAutoRemove",false); while(tagfile.Step(section)) { string pkgname = section.FindS("Package"); pkgCache::PkgIterator pkg=Cache->FindPkg(pkgname); // Silently ignore unknown packages and packages with no actual // version. if(!pkg.end() && !pkg.VersionList().end()) { short reason = section.FindI("Auto-Installed", 0); if(reason > 0) PkgState[pkg->ID].Flags |= Flag::Auto; if(debug_autoremove) std::cout << "Auto-Installed : " << pkgname << std::endl; 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 *prog, bool InstalledOnly) /*{{{*/ { bool debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false); if(debug_autoremove) std::clog << "pkgDepCache::writeStateFile()" << std::endl; FileFd StateFile; string state = _config->FindDir("Dir::State") + "extended_states"; // if it does not exist, create a empty one if(!FileExists(state)) { StateFile.Open(state, FileFd::WriteEmpty); StateFile.Close(); } // open it if(!StateFile.Open(state, FileFd::ReadOnly)) return _error->Error(_("Failed to open StateFile %s"), state.c_str()); FILE *OutFile; string outfile = state + ".tmp"; if((OutFile = fopen(outfile.c_str(),"w")) == NULL) return _error->Error(_("Failed to write temporary StateFile %s"), outfile.c_str()); // first merge with the existing sections pkgTagFile tagfile(&StateFile); pkgTagSection section; std::set<string> pkgs_seen; const char *nullreorderlist[] = {0}; while(tagfile.Step(section)) { string pkgname = section.FindS("Package"); // Silently ignore unknown packages and packages with no actual // version. pkgCache::PkgIterator pkg=Cache->FindPkg(pkgname); if(pkg.end() || pkg.VersionList().end()) continue; bool newAuto = (PkgState[pkg->ID].Flags & Flag::Auto); if(_config->FindB("Debug::pkgAutoRemove",false)) std::clog << "Update existing AutoInstall info: " << pkg.Name() << std::endl; TFRewriteData rewrite[2]; rewrite[0].Tag = "Auto-Installed"; rewrite[0].Rewrite = newAuto ? "1" : "0"; rewrite[0].NewTag = 0; rewrite[1].Tag = 0; TFRewrite(OutFile, section, nullreorderlist, rewrite); fprintf(OutFile,"\n"); pkgs_seen.insert(pkgname); } // then write the ones we have not seen yet std::ostringstream ostr; for(pkgCache::PkgIterator pkg=Cache->PkgBegin(); !pkg.end(); pkg++) { if(PkgState[pkg->ID].Flags & Flag::Auto) { if (pkgs_seen.find(pkg.Name()) != pkgs_seen.end()) { if(debug_autoremove) std::clog << "Skipping already written " << pkg.Name() << std::endl; continue; } // skip not installed ones if requested if(InstalledOnly && pkg->CurrentVer == 0) continue; if(debug_autoremove) std::clog << "Writing new AutoInstall: " << pkg.Name() << std::endl; ostr.str(string("")); ostr << "Package: " << pkg.Name() << "\nAuto-Installed: 1\n\n"; fprintf(OutFile,"%s",ostr.str().c_str()); fprintf(OutFile,"\n"); } } fclose(OutFile); // move the outfile over the real file and set permissions rename(outfile.c_str(), state.c_str()); 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 Dep,int 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.TargetPkg() != Dep.ParentPkg() || (Dep->Type != Dep::Conflicts && Dep->Type != Dep::DpkgBreaks && Dep->Type != Dep::Obsoletes)) { PkgIterator Pkg = Dep.TargetPkg(); // Check the base package if (Type == NowVersion && Pkg->CurrentVer != 0) if (VS().CheckDep(Pkg.CurrentVer().VerStr(),Dep->CompareOp, Dep.TargetVer()) == true) return true; if (Type == InstallVersion && PkgState[Pkg->ID].InstallVer != 0) if (VS().CheckDep(PkgState[Pkg->ID].InstVerIter(*this).VerStr(), Dep->CompareOp,Dep.TargetVer()) == true) return true; if (Type == CandidateVersion && PkgState[Pkg->ID].CandidateVer != 0) if (VS().CheckDep(PkgState[Pkg->ID].CandidateVerIter(*this).VerStr(), Dep->CompareOp,Dep.TargetVer()) == true) return true; } if (Dep->Type == Dep::Obsoletes) return false; // Check the providing packages PrvIterator P = Dep.TargetPkg().ProvidesList(); PkgIterator Pkg = Dep.ParentPkg(); for (; P.end() != true; P++) { /* Provides may never be applied against the same package if it is a conflicts. See the comment above. */ if (P.OwnerPkg() == Pkg && (Dep->Type == Dep::Conflicts || Dep->Type == Dep::DpkgBreaks)) continue; // Check if the provides is a hit if (Type == NowVersion) { if (P.OwnerPkg().CurrentVer() != P.OwnerVer()) continue; } if (Type == InstallVersion) { StateCache &State = PkgState[P.OwnerPkg()->ID]; if (State.InstallVer != (Version *)P.OwnerVer()) continue; } if (Type == CandidateVersion) { StateCache &State = PkgState[P.OwnerPkg()->ID]; if (State.CandidateVer != (Version *)P.OwnerVer()) continue; } // Compare the versions. if (VS().CheckDep(P.ProvideVersion(),Dep->CompareOp,Dep.TargetVer()) == true) { Res = P.OwnerPkg(); return true; } } return false; } /*}}}*/ // DepCache::AddSizes - Add the packages sizes to the counters /*{{{*/ // --------------------------------------------------------------------- /* Call with Mult = -1 to preform the inverse opration */ void pkgDepCache::AddSizes(const PkgIterator &Pkg,signed long Mult) { 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) { iUsrSize += (signed)(Mult*P.InstVerIter(*this)->InstalledSize); iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size); return; } // Upgrading if (Pkg->CurrentVer != 0 && (P.InstallVer != (Version *)Pkg.CurrentVer() || (P.iFlags & ReInstall) == ReInstall) && P.InstallVer != 0) { iUsrSize += (signed)(Mult*((signed)P.InstVerIter(*this)->InstalledSize - (signed)Pkg.CurrentVer()->InstalledSize)); iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size); return; } // Reinstall if (Pkg.State() == pkgCache::PkgIterator::NeedsUnpack && P.Delete() == false) { iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size); return; } // Removing if (Pkg->CurrentVer != 0 && P.InstallVer == 0) { iUsrSize -= (signed)(Mult*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 calld 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,int Add) { 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; if (State.Mode == ModeKeep) iKeepCount += Add; 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->Type == Dep::Conflicts || D->Type == Dep::DpkgBreaks || D->Type == Dep::Obsoletes) 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->Type == Dep::Conflicts || D->Type == Dep::DpkgBreaks || D->Type == Dep::Obsoletes) 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 Check, unsigned char SetMin, unsigned char SetPolicy) { unsigned char Dep = 0xFF; while (D.end() != true) { // Compute a single dependency element (glob or) DepIterator Start = D; unsigned char State = 0; for (bool LastOR = true; D.end() == false && LastOR == true; D++) { State |= DepState[D->ID]; LastOR = (D->CompareOp & Dep::Or) == Dep::Or; } // Minimum deps that must be satisfied to have a working package if (Start.IsCritical() == true) if ((State & Check) != Check) Dep &= ~SetMin; // Policy deps that must be satisfied to install the package 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 dependencys, Now, Install and Candidate. Callers must invert the result if dealing with conflicts. */ unsigned char pkgDepCache::DependencyState(DepIterator &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 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 *Prog) { iUsrSize = 0; iDownloadSize = 0; iDelCount = 0; iInstCount = 0; iKeepCount = 0; iBrokenCount = 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->Type == Dep::Conflicts || D->Type == Dep::DpkgBreaks || D->Type == Dep::Obsoletes) State = ~State; } } // Compute the pacakge 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->Type == Dep::Conflicts || D->Type == Dep::DpkgBreaks || D->Type == Dep::Obsoletes) 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 /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::MarkKeep(PkgIterator const &Pkg, bool Soft, bool FromUser, unsigned long Depth) { // Simplifies other routines. if (Pkg.end() == true) return; /* 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; /** \todo Can this be moved later in the method? */ ActionGroup group(*this); /* We changed the soft state all the time so the UI is a bit nicer to use */ StateCache &P = PkgState[Pkg->ID]; if (Soft == true) P.iFlags |= AutoKept; else P.iFlags &= ~AutoKept; // Check that it is not already kept if (P.Mode == ModeKeep) return; // We dont even try to keep virtual packages.. if (Pkg->VersionList == 0) return; #if 0 // reseting 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 suprising if(FromUser && !P.Marked) P.Flags &= ~Flag::Auto; #endif if (DebugMarker == true) std::clog << OutputInDepth(Depth) << "MarkKeep " << 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); } /*}}}*/ // DepCache::MarkDelete - Put the package in the delete state /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge, unsigned long Depth, bool FromUser) { // Simplifies other routines. if (Pkg.end() == true) return; ActionGroup group(*this); // Check that it is not already marked for delete StateCache &P = PkgState[Pkg->ID]; P.iFlags &= ~(AutoKept | Purge); if (rPurge == true) P.iFlags |= Purge; if ((P.Mode == ModeDelete || P.InstallVer == 0) && (Pkg.Purge() == true || rPurge == false)) return; // We dont even try to delete virtual packages.. if (Pkg->VersionList == 0) return; // check if we are allowed to install the package if (IsDeleteOk(Pkg,rPurge,Depth,FromUser) == false) return; if (DebugMarker == true) std::clog << OutputInDepth(Depth) << "MarkDelete " << 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); } /*}}}*/ // DepCache::IsDeleteOk - check if it is ok to remove this package /*{{{*/ // --------------------------------------------------------------------- /* The default implementation just honors dpkg hold But an application using this library can override this method to control the MarkDelete behaviour */ bool pkgDepCache::IsDeleteOk(PkgIterator const &Pkg,bool rPurge, unsigned long Depth, bool FromUser) { if (FromUser == false && Pkg->SelectedState == pkgCache::State::Hold && _config->FindB("APT::Ignore-Hold",false) == false) { if (DebugMarker == true) std::clog << OutputInDepth(Depth) << "Hold prevents MarkDelete of " << Pkg << " FU=" << FromUser << std::endl; return false; } return true; } /*}}}*/ // DepCache::MarkInstall - Put the package in the install state /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst, unsigned long Depth, bool FromUser, bool ForceImportantDeps) { if (Depth > 100) return; // Simplifies other routines. if (Pkg.end() == true) return; ActionGroup group(*this); /* Check that it is not already marked for install and that it can be installed */ StateCache &P = PkgState[Pkg->ID]; P.iFlags &= ~AutoKept; if ((P.InstPolicyBroken() == false && P.InstBroken() == false) && (P.Mode == ModeInstall || P.CandidateVer == (Version *)Pkg.CurrentVer())) { if (P.CandidateVer == (Version *)Pkg.CurrentVer() && P.InstallVer == 0) MarkKeep(Pkg, false, FromUser, Depth+1); return; } // See if there is even any possible instalation candidate if (P.CandidateVer == 0) return; // We dont even try to install virtual packages.. if (Pkg->VersionList == 0) return; // check if we are allowed to install the package if (IsInstallOk(Pkg,AutoInst,Depth,FromUser) == false) return; /* 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 cancelling the // removal of a garbage package. if(P.Status == 2 || (!Pkg.CurrentVer().end() && !P.Marked)) 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) return; if (DebugMarker == true) std::clog << OutputInDepth(Depth) << "MarkInstall " << Pkg << " FU=" << FromUser << std::endl; DepIterator Dep = P.InstVerIter(*this).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; /* 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) */ bool isNewImportantDep = false; bool isPreviouslySatisfiedImportantDep = false; if(!ForceImportantDeps && !Start.IsCritical()) { bool found=false; VerIterator instVer = Pkg.CurrentVer(); if(!instVer.end()) { for (DepIterator D = instVer.DependsList(); D.end() != true; D++) { //FIXME: deal better with or-groups(?) DepIterator LocalStart = D; if(IsImportantDep(D) && !D.IsCritical() && Start.TargetPkg() == D.TargetPkg()) { if(!isPreviouslySatisfiedImportantDep) { DepIterator D2 = D; while((D2->CompareOp & Dep::Or) != 0) ++D2; isPreviouslySatisfiedImportantDep = (((*this)[D2] & DepGNow) != 0); } found=true; } } // this is a new dep if it was not found to be already // a important dep of the installed pacakge isNewImportantDep = !found; } } if(isNewImportantDep) if(DebugAutoInstall == true) std::clog << OutputInDepth(Depth) << "new important dependency: " << Start.TargetPkg().Name() << std::endl; if(isPreviouslySatisfiedImportantDep) if(DebugAutoInstall == true) std::clog << OutputInDepth(Depth) << "previously satisfied important dependency on " << Start.TargetPkg().Name() << std::endl; // skip important deps if the package is already installed if (Pkg->CurrentVer != 0 && Start.IsCritical() == false && !isNewImportantDep && !isPreviouslySatisfiedImportantDep && !ForceImportantDeps) 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++; /* This bit is for processing the possibilty of an install/upgrade fixing the problem */ SPtrArray<Version *> List = Start.AllTargets(); if (Start->Type != Dep::DpkgBreaks && (DepState[Start->ID] & DepCVer) == DepCVer) { // Right, find the best version to install.. Version **Cur = List; PkgIterator P = Start.TargetPkg(); PkgIterator InstPkg(*Cache,0); // See if there are direct matches (at the start of the list) for (; *Cur != 0 && (*Cur)->ParentPkg == P.Index(); Cur++) { PkgIterator Pkg(*Cache,Cache->PkgP + (*Cur)->ParentPkg); if (PkgState[Pkg->ID].CandidateVer != *Cur) continue; InstPkg = Pkg; break; } // Select the highest priority providing package if (InstPkg.end() == true) { pkgPrioSortList(*Cache,Cur); for (; *Cur != 0; Cur++) { PkgIterator Pkg(*Cache,Cache->PkgP + (*Cur)->ParentPkg); if (PkgState[Pkg->ID].CandidateVer != *Cur) continue; InstPkg = Pkg; break; } } if (InstPkg.end() == false) { if(DebugAutoInstall == true) std::clog << OutputInDepth(Depth) << "Installing " << InstPkg.Name() << " as " << Start.DepType() << " of " << Pkg.Name() << std::endl; // now check if we should consider it a automatic dependency or not if(Pkg.Section() && ConfigValueInSubTree("APT::Never-MarkAuto-Sections", Pkg.Section())) { if(DebugAutoInstall == true) std::clog << OutputInDepth(Depth) << "Setting NOT as auto-installed (direct " << Start.DepType() << " of pkg in APT::Never-MarkAuto-Sections)" << std::endl; MarkInstall(InstPkg,true,Depth + 1, true); } else { // mark automatic dependency MarkInstall(InstPkg,true,Depth + 1, false, ForceImportantDeps); // Set the autoflag, after MarkInstall because MarkInstall unsets it if (P->CurrentVer == 0) PkgState[InstPkg->ID].Flags |= Flag::Auto; } } continue; } /* For conflicts we just de-install the package and mark as auto, Conflicts may not have or groups. For dpkg's Breaks we try to upgrade the package. */ if (Start->Type == Dep::Conflicts || Start->Type == Dep::Obsoletes || Start->Type == Dep::DpkgBreaks) { for (Version **I = List; *I != 0; I++) { VerIterator Ver(*this,*I); PkgIterator Pkg = Ver.ParentPkg(); if (Start->Type != Dep::DpkgBreaks) MarkDelete(Pkg,false,Depth + 1, false); else if (PkgState[Pkg->ID].CandidateVer != *I) MarkInstall(Pkg,true,Depth + 1, false, ForceImportantDeps); } continue; } } } /*}}}*/ // DepCache::IsInstallOk - check if it is ok to install this package /*{{{*/ // --------------------------------------------------------------------- /* The default implementation just honors dpkg hold But an application using this library can override this method to control the MarkInstall behaviour */ bool pkgDepCache::IsInstallOk(PkgIterator const &Pkg,bool AutoInst, unsigned long Depth, bool FromUser) { if (FromUser == false && Pkg->SelectedState == pkgCache::State::Hold && _config->FindB("APT::Ignore-Hold",false) == false) { if (DebugMarker == true) std::clog << OutputInDepth(Depth) << "Hold prevents MarkInstall of " << Pkg << " FU=" << FromUser << std::endl; return false; } return true; } /*}}}*/ // DepCache::SetReInstall - Set the reinstallation flag /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::SetReInstall(PkgIterator const &Pkg,bool To) { ActionGroup group(*this); RemoveSizes(Pkg); RemoveStates(Pkg); StateCache &P = PkgState[Pkg->ID]; if (To == true) P.iFlags |= ReInstall; else P.iFlags &= ~ReInstall; AddStates(Pkg); AddSizes(Pkg); } /*}}}*/ // DepCache::SetCandidateVersion - Change the candidate version /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDepCache::SetCandidateVersion(VerIterator TargetVer) { ActionGroup group(*this); pkgCache::PkgIterator Pkg = TargetVer.ParentPkg(); StateCache &P = PkgState[Pkg->ID]; RemoveSizes(Pkg); RemoveStates(Pkg); if (P.CandidateVer == P.InstallVer) P.InstallVer = (Version *)TargetVer; P.CandidateVer = (Version *)TargetVer; P.Update(Pkg,*this); AddStates(Pkg); Update(Pkg); AddSizes(Pkg); } 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(); // Strip off the epochs for display CurVersion = StripEpoch(CurVersion); CandVersion = StripEpoch(CandVersion); // 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 for (const char *I = Ver; *I != 0; I++) if (*I == ':') return I + 1; return Ver; } /*}}}*/ // 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 Pkg) { /* Not source/not automatic versions cannot be a candidate version unless they are already installed */ VerIterator Last(*(pkgCache *)this,0); 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()->Flags & Flag::NotSource) != 0) continue; /* Stash the highest version of a not-automatic source, we use it if there is nothing better */ if ((J.File()->Flags & Flag::NotAutomatic) != 0) { if (Last.end() == true) Last = I; continue; } return I; } } return Last; } /*}}}*/ // Policy::IsImportantDep - True if the dependency is important /*{{{*/ // --------------------------------------------------------------------- /* */ bool pkgDepCache::Policy::IsImportantDep(DepIterator Dep) { if(Dep.IsCritical()) return true; else if(Dep->Type == pkgCache::Dep::Recommends) { if ( _config->FindB("APT::Install-Recommends", false)) return true; // we suport a special mode to only install-recommends for certain // sections // FIXME: this is a meant as a temporarly 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 _config->FindB("APT::Install-Suggests", false); return false; } /*}}}*/ pkgDepCache::DefaultRootSetFunc::DefaultRootSetFunc() /*{{{*/ : constructedSuccessfully(false) { Configuration::Item const *Opts; Opts = _config->Tree("APT::NeverAutoRemove"); if (Opts != 0 && Opts->Child != 0) { Opts = Opts->Child; for (; Opts != 0; Opts = Opts->Next) { if (Opts->Value.empty() == true) continue; regex_t *p = new regex_t; if(regcomp(p,Opts->Value.c_str(), REG_EXTENDED | REG_ICASE | REG_NOSUB) != 0) { regfree(p); delete p; _error->Error("Regex compilation error for APT::NeverAutoRemove"); return; } rootSetRegexp.push_back(p); } } constructedSuccessfully = true; } /*}}}*/ pkgDepCache::DefaultRootSetFunc::~DefaultRootSetFunc() /*{{{*/ { for(unsigned int i = 0; i < rootSetRegexp.size(); i++) { regfree(rootSetRegexp[i]); delete rootSetRegexp[i]; } } /*}}}*/ bool pkgDepCache::DefaultRootSetFunc::InRootSet(const pkgCache::PkgIterator &pkg) /*{{{*/ { for(unsigned int i = 0; i < rootSetRegexp.size(); i++) if (regexec(rootSetRegexp[i], pkg.Name(), 0, 0, 0) == 0) return true; return false; } /*}}}*/ 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", false); } // pkgDepCache::MarkRequired - the main mark algorithm /*{{{*/ bool pkgDepCache::MarkRequired(InRootSetFunc &userFunc) { bool follow_recommends; bool follow_suggests; bool debug_autoremove = _config->FindB("Debug::pkgAutoRemove",false); // init the states for(PkgIterator p = PkgBegin(); !p.end(); ++p) { PkgState[p->ID].Marked = false; PkgState[p->ID].Garbage = false; // debug output if(debug_autoremove && PkgState[p->ID].Flags & Flag::Auto) std::clog << "AutoDep: " << p.Name() << std::endl; } // init vars follow_recommends = MarkFollowsRecommends(); 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].Flags & Flag::Auto) || (p->Flags & Flag::Essential) || userFunc.InRootSet(p)) { // the package is installed (and set to keep) if(PkgState[p->ID].Keep() && !p.CurrentVer().end()) MarkPackage(p, p.CurrentVer(), follow_recommends, follow_suggests); // the package is to be installed else if(PkgState[p->ID].Install()) MarkPackage(p, PkgState[p->ID].InstVerIter(*this), follow_recommends, follow_suggests); } } return true; } /*}}}*/ // MarkPackage - mark a single package in Mark-and-Sweep /*{{{*/ void pkgDepCache::MarkPackage(const pkgCache::PkgIterator &pkg, const pkgCache::VerIterator &ver, bool follow_recommends, bool follow_suggests) { pkgDepCache::StateCache &state = PkgState[pkg->ID]; VerIterator currver = pkg.CurrentVer(); VerIterator candver = state.CandidateVerIter(*this); VerIterator instver = state.InstVerIter(*this); #if 0 // If a package was garbage-collected but is now being marked, we // should re-select it // For cases when a pkg is set to upgrade and this trigger the // removal of a no-longer used dependency. if the pkg is set to // keep again later it will result in broken deps if(state.Delete() && state.RemoveReason = Unused) { if(ver==candver) mark_install(pkg, false, false, NULL); else if(ver==pkg.CurrentVer()) MarkKeep(pkg, false, false); instver=state.InstVerIter(*this); } #endif // For packages that are not going to be removed, ignore versions // other than the InstVer. For packages that are going to be // removed, ignore versions other than the current version. if(!(ver == instver && !instver.end()) && !(ver == currver && instver.end() && !ver.end())) return; // if we are marked already we are done if(state.Marked) return; bool debug_autoremove = _config->FindB("Debug::pkgAutoRemove", false); if(debug_autoremove) { std::clog << "Marking: " << pkg.Name(); if(!ver.end()) std::clog << " " << ver.VerStr(); if(!currver.end()) std::clog << ", Curr=" << currver.VerStr(); if(!instver.end()) std::clog << ", Inst=" << instver.VerStr(); std::clog << std::endl; } state.Marked=true; if(!ver.end()) { for(DepIterator d = ver.DependsList(); !d.end(); ++d) { if(d->Type == Dep::Depends || d->Type == Dep::PreDepends || (follow_recommends && d->Type == Dep::Recommends) || (follow_suggests && d->Type == Dep::Suggests)) { // Try all versions of this package. for(VerIterator V = d.TargetPkg().VersionList(); !V.end(); ++V) { if(_system->VS->CheckDep(V.VerStr(), d->CompareOp, d.TargetVer())) { if(debug_autoremove) { std::clog << "Following dep: " << d.ParentPkg().Name() << " " << d.ParentVer().VerStr() << " " << d.DepType() << " " << d.TargetPkg().Name(); if((d->CompareOp & ~pkgCache::Dep::Or) != pkgCache::Dep::NoOp) { std::clog << " (" << d.CompType() << " " << d.TargetVer() << ")"; } std::clog << std::endl; } MarkPackage(V.ParentPkg(), V, follow_recommends, follow_suggests); } } // Now try virtual packages for(PrvIterator prv=d.TargetPkg().ProvidesList(); !prv.end(); ++prv) { if(_system->VS->CheckDep(prv.ProvideVersion(), d->CompareOp, d.TargetVer())) { if(debug_autoremove) { std::clog << "Following dep: " << d.ParentPkg().Name() << " " << d.ParentVer().VerStr() << " " << d.DepType() << " " << d.TargetPkg().Name(); if((d->CompareOp & ~pkgCache::Dep::Or) != pkgCache::Dep::NoOp) { std::clog << " (" << d.CompType() << " " << d.TargetVer() << ")"; } std::clog << ", provided by " << prv.OwnerPkg().Name() << " " << prv.OwnerVer().VerStr() << std::endl; } MarkPackage(prv.OwnerPkg(), prv.OwnerVer(), follow_recommends, follow_suggests); } } } } } } /*}}}*/ 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::cout << "Garbage: " << p.Name() << std::endl; } } return true; } /*}}}*/