X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/4490f2de55989772dbdde652b27e661b6d4dce68..75e94aee76df0256eea7fbd8558437b93af28347:/apt-pkg/algorithms.cc diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc index adcbbd40c..479927d65 100644 --- a/apt-pkg/algorithms.cc +++ b/apt-pkg/algorithms.cc @@ -1,6 +1,6 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: algorithms.cc,v 1.30 2000/05/10 05:56:23 jgg Exp $ +// $Id: algorithms.cc,v 1.44 2002/11/28 18:49:16 jgg Exp $ /* ###################################################################### Algorithms - A set of misc algorithms @@ -20,26 +20,61 @@ #include #include #include -#include +#include + +#include + +#include /*}}}*/ +using namespace std; pkgProblemResolver *pkgProblemResolver::This = 0; // Simulate::Simulate - Constructor /*{{{*/ // --------------------------------------------------------------------- -/* */ -pkgSimulate::pkgSimulate(pkgDepCache &Cache) : pkgPackageManager(Cache), - Sim(Cache.GetMap()) +/* The legacy translations here of input Pkg iterators is obsolete, + this is not necessary since the pkgCaches are fully shared now. */ +pkgSimulate::pkgSimulate(pkgDepCache *Cache) : pkgPackageManager(Cache), + iPolicy(Cache), + Sim(&Cache->GetCache(),&iPolicy) { - Flags = new unsigned char[Cache.HeaderP->PackageCount]; - memset(Flags,0,sizeof(*Flags)*Cache.HeaderP->PackageCount); + Sim.Init(0); + Flags = new unsigned char[Cache->Head().PackageCount]; + memset(Flags,0,sizeof(*Flags)*Cache->Head().PackageCount); // Fake a filename so as not to activate the media swapping string Jnk = "SIMULATE"; - for (unsigned int I = 0; I != Cache.Head().PackageCount; I++) + for (unsigned int I = 0; I != Cache->Head().PackageCount; I++) FileNames[I] = Jnk; } /*}}}*/ +// Simulate::Describe - Describe a package /*{{{*/ +// --------------------------------------------------------------------- +/* Parameter Current == true displays the current package version, + Parameter Candidate == true displays the candidate package version */ +void pkgSimulate::Describe(PkgIterator Pkg,ostream &out,bool Current,bool Candidate) +{ + VerIterator Ver(Sim); + + out << Pkg.Name(); + + if (Current == true) + { + Ver = Pkg.CurrentVer(); + if (Ver.end() == false) + out << " [" << Ver.VerStr() << ']'; + } + + if (Candidate == true) + { + Ver = Sim[Pkg].CandidateVerIter(Sim); + if (Ver.end() == true) + return; + + out << " (" << Ver.VerStr() << ' ' << Ver.RelStr() << ')'; + } +} + /*}}}*/ // Simulate::Install - Simulate unpacking of a package /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -49,7 +84,8 @@ bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/) PkgIterator Pkg = Sim.FindPkg(iPkg.Name()); Flags[Pkg->ID] = 1; - cout << "Inst " << Pkg.Name(); + cout << "Inst "; + Describe(Pkg,cout,true,true); Sim.MarkInstall(Pkg,false); // Look for broken conflicts+predepends. @@ -58,16 +94,23 @@ bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/) if (Sim[I].InstallVer == 0) continue; - for (DepIterator D = Sim[I].InstVerIter(Sim).DependsList(); D.end() == false; D++) - if (D->Type == pkgCache::Dep::Conflicts || D->Type == pkgCache::Dep::PreDepends) + for (DepIterator D = Sim[I].InstVerIter(Sim).DependsList(); D.end() == false;) + { + DepIterator Start; + DepIterator End; + D.GlobOr(Start,End); + if (Start->Type == pkgCache::Dep::Conflicts || + Start->Type == pkgCache::Dep::Obsoletes || + End->Type == pkgCache::Dep::PreDepends) { - if ((Sim[D] & pkgDepCache::DepInstall) == 0) + if ((Sim[End] & pkgDepCache::DepGInstall) == 0) { - cout << " [" << I.Name() << " on " << D.TargetPkg().Name() << ']'; - if (D->Type == pkgCache::Dep::Conflicts) + cout << " [" << I.Name() << " on " << Start.TargetPkg().Name() << ']'; + if (Start->Type == pkgCache::Dep::Conflicts) _error->Error("Fatal, conflicts violated %s",I.Name()); } - } + } + } } if (Sim.BrokenCount() != 0) @@ -102,7 +145,9 @@ bool pkgSimulate::Configure(PkgIterator iPkg) (Sim[D] & pkgDepCache::DepInstall) != 0) continue; - if (D->Type == pkgCache::Dep::Conflicts) + if (D->Type == pkgCache::Dep::Obsoletes) + cout << " Obsoletes:" << D.TargetPkg().Name(); + else if (D->Type == pkgCache::Dep::Conflicts) cout << " Conflicts:" << D.TargetPkg().Name(); else cout << " Depends:" << D.TargetPkg().Name(); @@ -112,7 +157,10 @@ bool pkgSimulate::Configure(PkgIterator iPkg) _error->Error("Conf Broken %s",Pkg.Name()); } else - cout << "Conf " << Pkg.Name(); + { + cout << "Conf "; + Describe(Pkg,cout,false,true); + } if (Sim.BrokenCount() != 0) ShortBreaks(); @@ -133,9 +181,10 @@ bool pkgSimulate::Remove(PkgIterator iPkg,bool Purge) Flags[Pkg->ID] = 3; Sim.MarkDelete(Pkg); if (Purge == true) - cout << "Purg " << Pkg.Name(); + cout << "Purg "; else - cout << "Remv " << Pkg.Name(); + cout << "Remv "; + Describe(Pkg,cout,true,false); if (Sim.BrokenCount() != 0) ShortBreaks(); @@ -173,20 +222,24 @@ bool pkgApplyStatus(pkgDepCache &Cache) { for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++) { + if (I->VersionList == 0) + continue; + // Only choice for a ReInstReq package is to reinstall if (I->InstState == pkgCache::State::ReInstReq || I->InstState == pkgCache::State::HoldReInstReq) { - if (I.CurrentVer().Downloadable() == true) + if (I->CurrentVer != 0 && I.CurrentVer().Downloadable() == true) Cache.MarkKeep(I); else { // Is this right? Will dpkg choke on an upgrade? - if (Cache[I].CandidateVerIter(Cache).Downloadable() == true) + if (Cache[I].CandidateVer != 0 && + Cache[I].CandidateVerIter(Cache).Downloadable() == true) Cache.MarkInstall(I); else - return _error->Error("The package %s needs to be reinstalled, " - "but I can't find an archive for it.",I.Name()); + return _error->Error(_("The package %s needs to be reinstalled, " + "but I can't find an archive for it."),I.Name()); } continue; @@ -198,12 +251,13 @@ bool pkgApplyStatus(pkgDepCache &Cache) re-unpacked (probably) */ case pkgCache::State::UnPacked: case pkgCache::State::HalfConfigured: - if (I.CurrentVer().Downloadable() == true || + if ((I->CurrentVer != 0 && I.CurrentVer().Downloadable() == true) || I.State() != pkgCache::PkgIterator::NeedsUnpack) Cache.MarkKeep(I); else { - if (Cache[I].CandidateVerIter(Cache).Downloadable() == true) + if (Cache[I].CandidateVer != 0 && + Cache[I].CandidateVerIter(Cache).Downloadable() == true) Cache.MarkInstall(I); else Cache.MarkDelete(I); @@ -249,7 +303,7 @@ bool pkgFixBroken(pkgDepCache &Cache) Cache.MarkInstall(I,true); } - pkgProblemResolver Fix(Cache); + pkgProblemResolver Fix(&Cache); return Fix.Resolve(true); } /*}}}*/ @@ -281,7 +335,7 @@ bool pkgDistUpgrade(pkgDepCache &Cache) if (I->CurrentVer != 0) Cache.MarkInstall(I,false); - pkgProblemResolver Fix(Cache); + pkgProblemResolver Fix(&Cache); // Hold back held packages. if (_config->FindB("APT::Ignore-Hold",false) == false) @@ -306,7 +360,7 @@ bool pkgDistUpgrade(pkgDepCache &Cache) to install packages not marked for install */ bool pkgAllUpgrade(pkgDepCache &Cache) { - pkgProblemResolver Fix(Cache); + pkgProblemResolver Fix(&Cache); if (Cache.BrokenCount() != 0) return false; @@ -317,7 +371,7 @@ bool pkgAllUpgrade(pkgDepCache &Cache) if (Cache[I].Install() == true) Fix.Protect(I); - if (_config->FindB("APT::Ingore-Hold",false) == false) + if (_config->FindB("APT::Ignore-Hold",false) == false) if (I->SelectedState == pkgCache::State::Hold) continue; @@ -338,7 +392,7 @@ bool pkgMinimizeUpgrade(pkgDepCache &Cache) if (Cache.BrokenCount() != 0) return false; - // We loop indefinately to get the minimal set size. + // We loop for 10 tries to get the minimal set size. bool Change = false; unsigned int Count = 0; do @@ -375,10 +429,10 @@ bool pkgMinimizeUpgrade(pkgDepCache &Cache) // ProblemResolver::pkgProblemResolver - Constructor /*{{{*/ // --------------------------------------------------------------------- /* */ -pkgProblemResolver::pkgProblemResolver(pkgDepCache &Cache) : Cache(Cache) +pkgProblemResolver::pkgProblemResolver(pkgDepCache *pCache) : Cache(*pCache) { // Allocate memory - unsigned long Size = Cache.HeaderP->PackageCount; + unsigned long Size = Cache.Head().PackageCount; Scores = new signed short[Size]; Flags = new unsigned char[Size]; memset(Flags,0,sizeof(*Flags)*Size); @@ -387,6 +441,15 @@ pkgProblemResolver::pkgProblemResolver(pkgDepCache &Cache) : Cache(Cache) Debug = _config->FindB("Debug::pkgProblemResolver",false); } /*}}}*/ +// ProblemResolver::~pkgProblemResolver - Destructor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgProblemResolver::~pkgProblemResolver() +{ + delete [] Scores; + delete [] Flags; +} + /*}}}*/ // ProblemResolver::ScoreSort - Sort the list by score /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -406,7 +469,7 @@ int pkgProblemResolver::ScoreSort(const void *a,const void *b) /* */ void pkgProblemResolver::MakeScores() { - unsigned long Size = Cache.HeaderP->PackageCount; + unsigned long Size = Cache.Head().PackageCount; memset(Scores,0,sizeof(*Scores)*Size); // Generate the base scores for a package based on its properties @@ -450,7 +513,7 @@ void pkgProblemResolver::MakeScores() } // Copy the scores to advoid additive looping - signed short *OldScores = new signed short[Size]; + SPtrArray OldScores = new signed short[Size]; memcpy(OldScores,Scores,sizeof(*Scores)*Size); /* Now we cause 1 level of dependency inheritance, that is we add the @@ -493,9 +556,7 @@ void pkgProblemResolver::MakeScores() Scores[I->ID] += 10000; if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential) Scores[I->ID] += 5000; - } - - delete [] OldScores; + } } /*}}}*/ // ProblemResolver::DoUpgrade - Attempt to upgrade this package /*{{{*/ @@ -506,6 +567,8 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg) { if ((Flags[Pkg->ID] & Upgradable) == 0 || Cache[Pkg].Upgradable() == false) return false; + if ((Flags[Pkg->ID] & Protected) == Protected) + return false; Flags[Pkg->ID] &= ~Upgradable; @@ -573,8 +636,9 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg) { /* We let the algorithm deal with conflicts on its next iteration, it is much smarter than us */ - if (Start->Type == pkgCache::Dep::Conflicts) - break; + if (Start->Type == pkgCache::Dep::Conflicts || + Start->Type == pkgCache::Dep::Obsoletes) + break; if (Debug == true) clog << " Reinst Failed early because of " << Start.TargetPkg().Name() << endl; @@ -621,7 +685,7 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg) upgrade packages to advoid problems. */ bool pkgProblemResolver::Resolve(bool BrokenFix) { - unsigned long Size = Cache.HeaderP->PackageCount; + unsigned long Size = Cache.Head().PackageCount; // Record which packages are marked for install bool Again = false; @@ -657,7 +721,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) operates from highest score to lowest. This prevents problems when high score packages cause the removal of lower score packages that would cause the removal of even lower score packages. */ - pkgCache::Package **PList = new pkgCache::Package *[Size]; + SPtrArray PList = new pkgCache::Package *[Size]; pkgCache::Package **PEnd = PList; for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++) *PEnd++ = I; @@ -719,13 +783,16 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) if (Cache[I].InstallVer == 0 || Cache[I].InstBroken() == false) continue; + if (Debug == true) + cout << "Investigating " << I.Name() << endl; + // Isolate the problem dependency PackageKill KillList[100]; PackageKill *LEnd = KillList; bool InOr = false; pkgCache::DepIterator Start; pkgCache::DepIterator End; - PackageKill *OldEnd; + PackageKill *OldEnd = LEnd; enum {OrRemove,OrKeep} OrOp = OrRemove; for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); @@ -740,37 +807,57 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) if (OldEnd == LEnd && OrOp == OrRemove) { if ((Flags[I->ID] & Protected) != Protected) + { + if (Debug == true) + clog << " Or group remove for " << I.Name() << endl; Cache.MarkDelete(I); + Change = true; + } } if (OldEnd == LEnd && OrOp == OrKeep) + { + if (Debug == true) + clog << " Or group keep for " << I.Name() << endl; Cache.MarkKeep(I); + Change = true; + } } + /* We do an extra loop (as above) to finalize the or group + processing */ + InOr = false; OrOp = OrRemove; D.GlobOr(Start,End); + if (Start.end() == true) + break; + + // We only worry about critical deps. + if (End.IsCritical() != true) + continue; + InOr = Start != End; OldEnd = LEnd; - } + } else Start++; - // We only worry about critical deps. - if (End.IsCritical() != true) - continue; - // Dep is ok if ((Cache[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall) + { + InOr = false; continue; - + } + if (Debug == true) clog << "Package " << I.Name() << " has broken dep on " << Start.TargetPkg().Name() << endl; /* Look across the version list. If there are no possible targets then we keep the package and bail. This is necessary if a package has a dep on another package that cant be found */ - pkgCache::Version **VList = Start.AllTargets(); + SPtrArray VList = Start.AllTargets(); if (*VList == 0 && (Flags[I->ID] & Protected) != Protected && Start->Type != pkgCache::Dep::Conflicts && + Start->Type != pkgCache::Dep::Obsoletes && Cache[I].NowBroken() == false) { if (InOr == true) @@ -790,20 +877,25 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) { pkgCache::VerIterator Ver(Cache,*V); pkgCache::PkgIterator Pkg = Ver.ParentPkg(); - + if (Debug == true) clog << " Considering " << Pkg.Name() << ' ' << (int)Scores[Pkg->ID] << " as a solution to " << I.Name() << ' ' << (int)Scores[I->ID] << endl; + + /* Try to fix the package under consideration rather than + fiddle with the VList package */ if (Scores[I->ID] <= Scores[Pkg->ID] || ((Cache[Start] & pkgDepCache::DepNow) == 0 && - End->Type != pkgCache::Dep::Conflicts)) + End->Type != pkgCache::Dep::Conflicts && + End->Type != pkgCache::Dep::Obsoletes)) { // Try a little harder to fix protected packages.. if ((Flags[I->ID] & Protected) == Protected) { if (DoUpgrade(Pkg) == true) { - Scores[Pkg->ID] = Scores[I->ID]; + if (Scores[Pkg->ID] > Scores[I->ID]) + Scores[Pkg->ID] = Scores[I->ID]; break; } @@ -838,7 +930,10 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) clog << " Removing " << I.Name() << " rather than change " << Start.TargetPkg().Name() << endl; Cache.MarkDelete(I); if (Counter > 1) - Scores[I->ID] = Scores[Pkg->ID]; + { + if (Scores[Pkg->ID] > Scores[I->ID]) + Scores[I->ID] = Scores[Pkg->ID]; + } } } } @@ -849,21 +944,36 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) } else { + /* This is a conflicts, and the version we are looking + at is not the currently selected version of the + package, which means it is not necessary to + remove/keep */ + if (Cache[Pkg].InstallVer != Ver && + (Start->Type == pkgCache::Dep::Conflicts || + Start->Type == pkgCache::Dep::Obsoletes)) + continue; + // Skip adding to the kill list if it is protected if ((Flags[Pkg->ID] & Protected) != 0) continue; + + if (Debug == true) + clog << " Added " << Pkg.Name() << " to the remove list" << endl; LEnd->Pkg = Pkg; LEnd->Dep = End; LEnd++; - if (Start->Type != pkgCache::Dep::Conflicts) + if (Start->Type != pkgCache::Dep::Conflicts && + Start->Type != pkgCache::Dep::Obsoletes) break; } } // Hm, nothing can possibly satisify this dep. Nuke it. - if (VList[0] == 0 && Start->Type != pkgCache::Dep::Conflicts && + if (VList[0] == 0 && + Start->Type != pkgCache::Dep::Conflicts && + Start->Type != pkgCache::Dep::Obsoletes && (Flags[I->ID] & Protected) != Protected) { bool Installed = Cache[I].Install(); @@ -893,8 +1003,6 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) Done = true; } - delete [] VList; - // Try some more if (InOr == true) continue; @@ -911,7 +1019,8 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) Change = true; if ((Cache[J->Dep] & pkgDepCache::DepGNow) == 0) { - if (J->Dep->Type == pkgCache::Dep::Conflicts) + if (J->Dep->Type == pkgCache::Dep::Conflicts || + J->Dep->Type == pkgCache::Dep::Obsoletes) { if (Debug == true) clog << " Fixing " << I.Name() << " via remove of " << J->Pkg.Name() << endl; @@ -924,9 +1033,12 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) clog << " Fixing " << I.Name() << " via keep of " << J->Pkg.Name() << endl; Cache.MarkKeep(J->Pkg); } - + if (Counter > 1) - Scores[J->Pkg->ID] = Scores[I->ID]; + { + if (Scores[I->ID] > Scores[J->Pkg->ID]) + Scores[J->Pkg->ID] = Scores[I->ID]; + } } } } @@ -934,10 +1046,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) if (Debug == true) clog << "Done" << endl; - - delete [] Scores; - delete [] PList; - + if (Cache.BrokenCount() != 0) { // See if this is the result of a hold @@ -947,9 +1056,9 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) if (Cache[I].InstBroken() == false) continue; if ((Flags[I->ID] & Protected) != Protected) - return _error->Error("Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages."); + return _error->Error(_("Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.")); } - return _error->Error("Unable to correct problems, you have held broken packages."); + return _error->Error(_("Unable to correct problems, you have held broken packages.")); } return true; @@ -962,7 +1071,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) system was non-broken previously. */ bool pkgProblemResolver::ResolveByKeep() { - unsigned long Size = Cache.HeaderP->PackageCount; + unsigned long Size = Cache.Head().PackageCount; if (Debug == true) clog << "Entering ResolveByKeep" << endl; @@ -990,7 +1099,7 @@ bool pkgProblemResolver::ResolveByKeep() continue; /* Keep the package. If this works then great, otherwise we have - to be significantly more agressive and manipulate its dependencies */ + to be significantly more agressive and manipulate its dependencies */ if ((Flags[I->ID] & Protected) == 0) { if (Debug == true) @@ -998,7 +1107,7 @@ bool pkgProblemResolver::ResolveByKeep() Cache.MarkKeep(I); if (Cache[I].InstBroken() == false) { - K = PList; + K = PList - 1; continue; } } @@ -1006,18 +1115,10 @@ bool pkgProblemResolver::ResolveByKeep() // Isolate the problem dependencies for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); D.end() == false;) { - // Compute a single dependency element (glob or) - pkgCache::DepIterator Start = D; - pkgCache::DepIterator End = D; - unsigned char State = 0; - for (bool LastOR = true; D.end() == false && LastOR == true; D++) - { - State |= Cache[D]; - LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or; - if (LastOR == true) - End = D; - } - + DepIterator Start; + DepIterator End; + D.GlobOr(Start,End); + // We only worry about critical deps. if (End.IsCritical() != true) continue; @@ -1025,42 +1126,47 @@ bool pkgProblemResolver::ResolveByKeep() // Dep is ok if ((Cache[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall) continue; - - // Hm, the group is broken.. I have no idea how to handle this - if (Start != End) - { - clog << "Note, a broken or group was found in " << I.Name() << "." << endl; - if ((Flags[I->ID] & Protected) == 0) - Cache.MarkKeep(I); - break; - } - - if (Debug == true) - clog << "Package " << I.Name() << " has broken dep on " << End.TargetPkg().Name() << endl; - - // Look at all the possible provides on this package - pkgCache::Version **VList = End.AllTargets(); - for (pkgCache::Version **V = VList; *V != 0; V++) + + /* Hm, the group is broken.. I suppose the best thing to do is to + is to try every combination of keep/not-keep for the set, but thats + slow, and this never happens, just be conservative and assume the + list of ors is in preference and keep till it starts to work. */ + while (true) { - pkgCache::VerIterator Ver(Cache,*V); - pkgCache::PkgIterator Pkg = Ver.ParentPkg(); - - // It is not keepable - if (Cache[Pkg].InstallVer == 0 || - Pkg->CurrentVer == 0) - continue; + if (Debug == true) + clog << "Package " << I.Name() << " has broken dep on " << Start.TargetPkg().Name() << endl; - if ((Flags[I->ID] & Protected) == 0) + // Look at all the possible provides on this package + SPtrArray VList = Start.AllTargets(); + for (pkgCache::Version **V = VList; *V != 0; V++) { - if (Debug == true) - clog << " Keeping Package " << Pkg.Name() << " due to dep" << endl; - Cache.MarkKeep(Pkg); + pkgCache::VerIterator Ver(Cache,*V); + pkgCache::PkgIterator Pkg = Ver.ParentPkg(); + + // It is not keepable + if (Cache[Pkg].InstallVer == 0 || + Pkg->CurrentVer == 0) + continue; + + if ((Flags[I->ID] & Protected) == 0) + { + if (Debug == true) + clog << " Keeping Package " << Pkg.Name() << " due to dep" << endl; + Cache.MarkKeep(Pkg); + } + + if (Cache[I].InstBroken() == false) + break; } if (Cache[I].InstBroken() == false) break; - } + if (Start == End) + break; + Start++; + } + if (Cache[I].InstBroken() == false) break; } @@ -1072,7 +1178,7 @@ bool pkgProblemResolver::ResolveByKeep() if (K == LastStop) return _error->Error("Internal Error, pkgProblemResolver::ResolveByKeep is looping on package %s.",I.Name()); LastStop = K; - K = PList; + K = PList - 1; } return true; @@ -1095,3 +1201,34 @@ void pkgProblemResolver::InstallProtect() } } /*}}}*/ + +// PrioSortList - Sort a list of versions by priority /*{{{*/ +// --------------------------------------------------------------------- +/* This is ment to be used in conjunction with AllTargets to get a list + of versions ordered by preference. */ +static pkgCache *PrioCache; +static int PrioComp(const void *A,const void *B) +{ + pkgCache::VerIterator L(*PrioCache,*(pkgCache::Version **)A); + pkgCache::VerIterator R(*PrioCache,*(pkgCache::Version **)B); + + if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential && + (R.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential) + return 1; + if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential && + (R.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential) + return -1; + + if (L->Priority != R->Priority) + return R->Priority - L->Priority; + return strcmp(L.ParentPkg().Name(),R.ParentPkg().Name()); +} +void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List) +{ + unsigned long Count = 0; + PrioCache = &Cache; + for (pkgCache::Version **I = List; *I != 0; I++) + Count++; + qsort(List,Count,sizeof(*List),PrioComp); +} + /*}}}*/