X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/6009e60d0192832277242438ad7ca2fc24a4c075..304731b8f23e03d15d1c2d6f66e1bf5f26ac0ca2:/apt-pkg/policy.cc diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc index 81fdb0431..0a06cc6e3 100644 --- a/apt-pkg/policy.cc +++ b/apt-pkg/policy.cc @@ -16,27 +16,28 @@ 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 /*{{{*/ +#include + #include #include +#include #include #include +#include #include #include - -#include -#include -#include -#include #include #include + +#include /*}}}*/ using namespace std; @@ -47,6 +48,8 @@ using namespace std; 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]; @@ -56,8 +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(); } /*}}}*/ @@ -67,14 +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.. @@ -83,10 +102,10 @@ 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) { if (Match.FileMatch(F) == true && Fixed[F->ID] == false) { @@ -107,8 +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; } @@ -117,12 +136,16 @@ 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) { // Look for a package pin and evaluate it. 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; @@ -143,9 +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) @@ -153,30 +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; } /*}}}*/ @@ -189,49 +237,89 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg) void pkgPolicy::CreatePin(pkgVersionMatch::MatchType Type,string Name, string Data,signed short Priority) { - Pin *P = 0; - if (Name.empty() == true) - P = &*Defaults.insert(Defaults.end(),PkgPin()); - else { - // Get a spot to put the pin - pkgCache::PkgIterator Pkg = Cache->FindPkg(Name); - 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(),PkgPin()); - } + 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; } - - // Set.. - P->Type = Type; - P->Priority = Priority; - P->Data = Data; } /*}}}*/ // Policy::GetMatch - Get the matching version for a package pin /*{{{*/ // --------------------------------------------------------------------- /* */ -pkgCache::VerIterator pkgPolicy::GetMatch(pkgCache::PkgIterator Pkg) +pkgCache::VerIterator pkgPolicy::GetMatch(pkgCache::PkgIterator const &Pkg) { const Pin &PPkg = Pins[Pkg->ID]; - if (PPkg.Type != pkgVersionMatch::None) - { - pkgVersionMatch Match(PPkg.Data,PPkg.Type); - return Match.Find(Pkg); - } - return pkgCache::VerIterator(*Pkg.Cache()); + 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 /*{{{*/ @@ -248,6 +336,10 @@ signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg) } return 0; +} +signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File) +{ + return PFPriority[File->ID]; } /*}}}*/ // PreferenceSection class - Overriding the default TrimRecord method /*{{{*/ @@ -276,45 +368,16 @@ bool ReadPinDir(pkgPolicy &Plcy,string Dir) if (Dir.empty() == true) Dir = _config->FindDir("Dir::Etc::PreferencesParts"); - if (FileExists(Dir) == false) + if (DirectoryExists(Dir) == false) { - _error->WarningE("FileExists",_("Unable to read %s"),Dir.c_str()); + _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str()); return true; } - DIR *D = opendir(Dir.c_str()); - if (D == 0) - return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str()); - - vector List; - - for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D)) - { - if (Ent->d_name[0] == '.') - continue; - - // Skip bad file names ala run-parts - const char *C = Ent->d_name; - for (; *C != 0; C++) - if (isalpha(*C) == 0 && isdigit(*C) == 0 && *C != '_' && *C != '-') - break; - if (*C != 0) - continue; - - // Make sure it is a file and not something else - string File = flCombine(Dir,Ent->d_name); - struct stat St; - if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0) - continue; - - List.push_back(File); - } - closedir(D); - - sort(List.begin(),List.end()); + vector const List = GetListOfFilesInDir(Dir, "pref", true, true); // Read the files - for (vector::const_iterator I = List.begin(); I != List.end(); I++) + for (vector::const_iterator I = List.begin(); I != List.end(); ++I) if (ReadPinFile(Plcy, *I) == false) return false; return true; @@ -331,7 +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);