X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/20ebd488ff29272654ab101d5ca25fa5fd4905f5..67c3067f1a615fd6ff0b332c2a526d052442913d:/apt-pkg/policy.cc diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc index da72f193a..d0f97441d 100644 --- a/apt-pkg/policy.cc +++ b/apt-pkg/policy.cc @@ -1,6 +1,6 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: policy.cc,v 1.5 2001/03/13 05:23:42 jgg Exp $ +// $Id: policy.cc,v 1.10 2003/08/12 00:17:37 mdz Exp $ /* ###################################################################### Package Version Policy implementation @@ -16,32 +16,40 @@ 990 = Config file override package files 989 = Start for preference auto-priorities 500 = Default package files - 100 = The status file + 100 = The status file and ButAutomaticUpgrades sources 0 -> 100 = NotAutomatic sources like experimental -inf -> 0 = Never selected ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ -#ifdef __GNUG__ -#pragma implementation "apt-pkg/policy.h" -#endif +#include + #include #include +#include #include #include +#include #include #include - + +#include +#include + #include /*}}}*/ +using namespace std; + // Policy::Init - Startup and bind to a cache /*{{{*/ // --------------------------------------------------------------------- /* Set the defaults for operation. The default mode with no loaded policy file matches the V0 policy engine. */ pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(0), PFPriority(0), Cache(Owner) { + if (Owner == 0 || &(Owner->Head()) == 0) + return; PFPriority = new signed short[Owner->Head().PackageFileCount]; Pins = new Pin[Owner->Head().PackageCount]; @@ -51,8 +59,23 @@ pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(0), PFPriority(0), Cache(Owner) // The config file has a master override. string DefRel = _config->Find("APT::Default-Release"); if (DefRel.empty() == false) - CreatePin(pkgVersionMatch::Release,"",DefRel,990); - + { + bool found = false; + // FIXME: make ExpressionMatches static to use it here easily + pkgVersionMatch vm("", pkgVersionMatch::None); + for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F) + { + if ((F->Archive != 0 && vm.ExpressionMatches(DefRel, F.Archive()) == true) || + (F->Codename != 0 && vm.ExpressionMatches(DefRel, F.Codename()) == true) || + (F->Version != 0 && vm.ExpressionMatches(DefRel, F.Version()) == true) || + (DefRel.length() > 2 && DefRel[1] == '=')) + found = true; + } + if (found == false) + _error->Error(_("The value '%s' is invalid for APT::Default-Release as such a release is not available in the sources"), DefRel.c_str()); + else + CreatePin(pkgVersionMatch::Release,"",DefRel,990); + } InitDefaults(); } /*}}}*/ @@ -62,14 +85,15 @@ pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(0), PFPriority(0), Cache(Owner) bool pkgPolicy::InitDefaults() { // Initialize the priorities based on the status of the package file - for (pkgCache::PkgFileIterator I = Cache->FileBegin(); I != Cache->FileEnd(); I++) + for (pkgCache::PkgFileIterator I = Cache->FileBegin(); I != Cache->FileEnd(); ++I) { PFPriority[I->ID] = 500; if ((I->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource) PFPriority[I->ID] = 100; - else - if ((I->Flags & pkgCache::Flag::NotAutomatic) == pkgCache::Flag::NotAutomatic) - PFPriority[I->ID] = 1; + else if ((I->Flags & pkgCache::Flag::ButAutomaticUpgrades) == pkgCache::Flag::ButAutomaticUpgrades) + PFPriority[I->ID] = 100; + else if ((I->Flags & pkgCache::Flag::NotAutomatic) == pkgCache::Flag::NotAutomatic) + PFPriority[I->ID] = 1; } // Apply the defaults.. @@ -78,15 +102,11 @@ bool pkgPolicy::InitDefaults() signed Cur = 989; StatusOverride = false; for (vector::const_iterator I = Defaults.begin(); I != Defaults.end(); - I++, Cur--) + ++I, --Cur) { pkgVersionMatch Match(I->Data,I->Type); - for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); F++) + for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F) { -/* hmm? - if ((F->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource) - continue;*/ - if (Match.FileMatch(F) == true && Fixed[F->ID] == false) { if (I->Priority != 0 && I->Priority > 0) @@ -106,8 +126,8 @@ bool pkgPolicy::InitDefaults() } if (_config->FindB("Debug::pkgPolicy",false) == true) - for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); F++) - cout << "Prio of " << F.FileName() << ' ' << PFPriority[F->ID] << endl; + for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F) + std::clog << "Prio of " << F.FileName() << ' ' << PFPriority[F->ID] << std::endl; return true; } @@ -116,22 +136,24 @@ bool pkgPolicy::InitDefaults() // --------------------------------------------------------------------- /* Evaluate the package pins and the default list to deteremine what the best package is. */ -pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg) +pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator const &Pkg) { - const Pin &PPkg = Pins[Pkg->ID]; - // Look for a package pin and evaluate it. - signed Max = 0; - pkgCache::VerIterator Pref(*Cache); - if (PPkg.Type != pkgVersionMatch::None) - { - pkgVersionMatch Match(PPkg.Data,PPkg.Type); - Pref = Match.Find(Pkg); - Max = PPkg.Priority; - if (PPkg.Priority == 0) - Max = 989; - } - + signed Max = GetPriority(Pkg); + pkgCache::VerIterator Pref = GetMatch(Pkg); + + // Alternatives in case we can not find our package pin (Bug#512318). + signed MaxAlt = 0; + pkgCache::VerIterator PrefAlt; + + // no package = no candidate version + if (Pkg.end() == true) + return Pref; + + // packages with a pin lower than 0 have no newer candidate than the current version + if (Max < 0) + return Pkg.CurrentVer(); + /* Falling through to the default version.. Setting Max to zero effectively excludes everything <= 0 which are the non-automatic priorities.. The status file is given a prio of 100 which will exclude @@ -144,9 +166,16 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg) tracks the default when the default is taken away, and a permanent pin that stays at that setting. */ - for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; Ver++) + bool PrefSeen = false; + for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; ++Ver) { - for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; VF++) + /* Lets see if this version is the installed version */ + bool instVer = (Pkg.CurrentVer() == Ver); + + if (Pref == Ver) + PrefSeen = true; + + for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF) { /* If this is the status file, and the current version is not the version in the status file (ie it is not installed, or somesuch) @@ -154,31 +183,48 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg) out bogus entries that may be due to config-file states, or other. */ if ((VF.File()->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource && - Pkg.CurrentVer() != Ver) + instVer == false) continue; - + signed Prio = PFPriority[VF.File()->ID]; if (Prio > Max) { Pref = Ver; Max = Prio; - } - } - - if (Pkg.CurrentVer() == Ver && Max < 1000) + PrefSeen = true; + } + if (Prio > MaxAlt) + { + PrefAlt = Ver; + MaxAlt = Prio; + } + } + + if (instVer == true && Max < 1000) { + /* Not having seen the Pref yet means we have a specific pin below 1000 + on a version below the current installed one, so ignore the specific pin + as this would be a downgrade otherwise */ + if (PrefSeen == false || Pref.end() == true) + { + Pref = Ver; + PrefSeen = true; + } /* Elevate our current selection (or the status file itself) to the Pseudo-status priority. */ - if (Pref.end() == true) - Pref = Ver; Max = 1000; - + // Fast path optimize. if (StatusOverride == false) break; - } + } } - + // If we do not find our candidate, use the one with the highest pin. + // This means that if there is a version available with pin > 0; there + // will always be a candidate (Closes: #512318) + if (!Pref.IsGood() && MaxAlt > 0) + Pref = PrefAlt; + return Pref; } /*}}}*/ @@ -191,38 +237,152 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg) void pkgPolicy::CreatePin(pkgVersionMatch::MatchType Type,string Name, string Data,signed short Priority) { - pkgCache::PkgIterator Pkg = Cache->FindPkg(Name); - Pin *P = 0; - if (Name.empty() == true) - P = Defaults.insert(Defaults.end()); - else { - // Get a spot to put the pin - if (Pkg.end() == true) - { - // Check the unmatched table - for (vector::iterator I = Unmatched.begin(); - I != Unmatched.end() && P == 0; I++) - if (I->Pkg == Name) - P = I; - - if (P == 0) - P = Unmatched.insert(Unmatched.end()); - } + Pin *P = &*Defaults.insert(Defaults.end(),Pin()); + P->Type = Type; + P->Priority = Priority; + P->Data = Data; + return; + } + + size_t found = Name.rfind(':'); + string Arch; + if (found != string::npos) { + Arch = Name.substr(found+1); + Name.erase(found); + } + + // Allow pinning by wildcards + // TODO: Maybe we should always prefer specific pins over non- + // specific ones. + if (Name[0] == '/' || Name.find_first_of("*[?") != string::npos) + { + pkgVersionMatch match(Data, Type); + for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() != true; ++G) + if (match.ExpressionMatches(Name, G.Name())) + { + if (Arch.empty() == false) + CreatePin(Type, string(G.Name()).append(":").append(Arch), Data, Priority); + else + CreatePin(Type, G.Name(), Data, Priority); + } + return; + } + + // find the package (group) this pin applies to + pkgCache::GrpIterator Grp = Cache->FindGrp(Name); + bool matched = false; + if (Grp.end() == false) + { + std::string MatchingArch; + if (Arch.empty() == true) + MatchingArch = Cache->NativeArch(); else + MatchingArch = Arch; + APT::CacheFilter::PackageArchitectureMatchesSpecification pams(MatchingArch); + for (pkgCache::PkgIterator Pkg = Grp.PackageList(); Pkg.end() != true; Pkg = Grp.NextPkg(Pkg)) { - P = Pins + Pkg->ID; - } + if (pams(Pkg.Arch()) == false) + continue; + Pin *P = Pins + Pkg->ID; + // the first specific stanza for a package is the ruler, + // all others need to be ignored + if (P->Type != pkgVersionMatch::None) + P = &*Unmatched.insert(Unmatched.end(),PkgPin(Pkg.FullName())); + P->Type = Type; + P->Priority = Priority; + P->Data = Data; + matched = true; + } + } + + if (matched == false) + { + PkgPin *P = &*Unmatched.insert(Unmatched.end(),PkgPin(Name)); + if (Arch.empty() == false) + P->Pkg.append(":").append(Arch); + P->Type = Type; + P->Priority = Priority; + P->Data = Data; + return; + } +} + /*}}}*/ +// Policy::GetMatch - Get the matching version for a package pin /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgCache::VerIterator pkgPolicy::GetMatch(pkgCache::PkgIterator const &Pkg) +{ + const Pin &PPkg = Pins[Pkg->ID]; + if (PPkg.Type == pkgVersionMatch::None) + return pkgCache::VerIterator(*Pkg.Cache()); + + pkgVersionMatch Match(PPkg.Data,PPkg.Type); + return Match.Find(Pkg); +} + /*}}}*/ +// Policy::GetPriority - Get the priority of the package pin /*{{{*/ +// --------------------------------------------------------------------- +/* */ +signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg) +{ + if (Pins[Pkg->ID].Type != pkgVersionMatch::None) + { + // In this case 0 means default priority + if (Pins[Pkg->ID].Priority == 0) + return 989; + return Pins[Pkg->ID].Priority; } - // Set.. - P->Type = Type; - P->Priority = Priority; - P->Data = Data; + return 0; +} +signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File) +{ + return PFPriority[File->ID]; } /*}}}*/ +// PreferenceSection class - Overriding the default TrimRecord method /*{{{*/ +// --------------------------------------------------------------------- +/* The preference file is a user generated file so the parser should + therefore be a bit more friendly by allowing comments and new lines + all over the place rather than forcing a special format */ +class PreferenceSection : public pkgTagSection +{ + void TrimRecord(bool BeforeRecord, const char* &End) + { + for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++) + if (Stop[0] == '#') + Stop = (const char*) memchr(Stop,'\n',End-Stop); + } +}; + /*}}}*/ +// ReadPinDir - Load the pin files from this dir into a Policy /*{{{*/ +// --------------------------------------------------------------------- +/* This will load each pin file in the given dir into a Policy. If the + given dir is empty the dir set in Dir::Etc::PreferencesParts is used. + Note also that this method will issue a warning if the dir does not + exists but it will return true in this case! */ +bool ReadPinDir(pkgPolicy &Plcy,string Dir) +{ + if (Dir.empty() == true) + Dir = _config->FindDir("Dir::Etc::PreferencesParts"); + if (DirectoryExists(Dir) == false) + { + _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str()); + return true; + } + + vector const List = GetListOfFilesInDir(Dir, "pref", true, true); + + // Read the files + for (vector::const_iterator I = List.begin(); I != List.end(); ++I) + if (ReadPinFile(Plcy, *I) == false) + return false; + return true; +} + /*}}}*/ // ReadPinFile - Load the pin file into a Policy /*{{{*/ // --------------------------------------------------------------------- /* I'd like to see the preferences file store more than just pin information @@ -234,7 +394,7 @@ bool ReadPinFile(pkgPolicy &Plcy,string File) if (File.empty() == true) File = _config->FindFile("Dir::Etc::Preferences"); - if (FileExists(File) == false) + if (RealFileExists(File) == false) return true; FileFd Fd(File,FileFd::ReadOnly); @@ -242,12 +402,16 @@ bool ReadPinFile(pkgPolicy &Plcy,string File) if (_error->PendingError() == true) return false; - pkgTagSection Tags; + PreferenceSection Tags; while (TF.Step(Tags) == true) { + // can happen when there are only comments in a record + if (Tags.Count() == 0) + continue; + string Name = Tags.FindS("Package"); if (Name.empty() == true) - return _error->Error(_("Invalid record in the preferences file, no Package header")); + return _error->Error(_("Invalid record in the preferences file %s, no Package header"), File.c_str()); if (Name == "*") Name = string(); @@ -274,8 +438,20 @@ bool ReadPinFile(pkgPolicy &Plcy,string File) } for (; Word != End && isspace(*Word) != 0; Word++); - Plcy.CreatePin(Type,Name,string(Word,End), - Tags.FindI("Pin-Priority")); + short int priority = Tags.FindI("Pin-Priority", 0); + if (priority == 0) + { + _error->Warning(_("No priority (or zero) specified for pin")); + continue; + } + + istringstream s(Name); + string pkg; + while(!s.eof()) + { + s >> pkg; + Plcy.CreatePin(Type, pkg, string(Word,End),priority); + }; } Plcy.InitDefaults();