X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/88a8975f156e452d9f3ebe76822b236e8962ebba..952ee63b0af14a534c0aca00c11d1a99be6b22b2:/apt-pkg/policy.cc diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc index eaa72f084..2bdd96d8c 100644 --- a/apt-pkg/policy.cc +++ b/apt-pkg/policy.cc @@ -33,6 +33,7 @@ #include #include #include +#include #include /*}}}*/ @@ -131,119 +132,21 @@ bool pkgPolicy::InitDefaults() best package is. */ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator const &Pkg) { - if (_config->FindI("APT::Policy", 1) >= 1) { - return GetCandidateVerNew(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; - - // 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 - not-automatic sources, except in a single shot not-installed mode. - - The user pin is subject to the same priority rules as default - selections. Thus there are two ways to create a pin - a pin that - tracks the default when the default is taken away, and a permanent - pin that stays at that setting. - */ - bool PrefSeen = false; - for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; ++Ver) - { - /* 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) - then it is not a candidate for installation, ever. This weeds - out bogus entries that may be due to config-file states, or - other. */ - if (VF.File().Flagged(pkgCache::Flag::NotSource) && instVer == false) - continue; - - signed Prio = PFPriority[VF.File()->ID]; - if (Prio > Max) - { - Pref = Ver; - Max = Prio; - 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) so that only - a downgrade can override it from now on */ - Max = 999; - - // 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; -} - -// Policy::GetCandidateVer - Get the candidate install version /*{{{*/ -// --------------------------------------------------------------------- -/* Evaluate the package pins and the default list to deteremine what the - best package is. */ -pkgCache::VerIterator pkgPolicy::GetCandidateVerNew(pkgCache::PkgIterator const &Pkg) -{ - // TODO: Replace GetCandidateVer() pkgCache::VerIterator cand; pkgCache::VerIterator cur = Pkg.CurrentVer(); int candPriority = -1; pkgVersioningSystem *vs = Cache->VS; - for (pkgCache::VerIterator ver = Pkg.VersionList(); ver.end() == false; ver++) { - int priority = GetPriority(ver); + for (pkgCache::VerIterator ver = Pkg.VersionList(); ver.end() == false; ++ver) { + int priority = GetPriority(ver, true); - if (priority == 0 || priority <= candPriority) - continue; + if (priority == 0 || priority <= candPriority) + continue; - // TODO: Maybe optimize to not compare versions - if (!cur.end() && priority < 1000 - && (vs->CmpVersion(ver.VerStr(), cur.VerStr()) < 0)) - continue; + // TODO: Maybe optimize to not compare versions + if (!cur.end() && priority < 1000 + && (vs->CmpVersion(ver.VerStr(), cur.VerStr()) < 0)) + continue; candPriority = priority; cand = ver; @@ -321,7 +224,7 @@ void pkgPolicy::CreatePin(pkgVersionMatch::MatchType Type,string Name, // Find matching version(s) and copy the pin into it pkgVersionMatch Match(P->Data,P->Type); - for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() != true; Ver++) + for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() != true; ++Ver) { if (Match.VersionMatches(Ver)) { Pin *VP = VerPins + Ver->ID; @@ -373,7 +276,8 @@ APT_PURE signed short pkgPolicy::GetPriority(pkgCache::VerIterator const &Ver, b if (!ConsiderFiles) return 0; - int priority = std::numeric_limits::min(); + // priorities are short ints, but we want to pick a value outside the valid range here + auto priority = std::numeric_limits::min(); for (pkgCache::VerFileIterator file = Ver.FileList(); file.end() == false; file++) { /* If this is the status file, and the current version is not the @@ -381,14 +285,13 @@ APT_PURE signed short pkgPolicy::GetPriority(pkgCache::VerIterator const &Ver, b then it is not a candidate for installation, ever. This weeds out bogus entries that may be due to config-file states, or other. */ - if (file.File().Flagged(pkgCache::Flag::NotSource) && Ver.ParentPkg().CurrentVer() != Ver) { - // Ignore - } else if (GetPriority(file.File()) > priority) { - priority = GetPriority(file.File()); - } + if (file.File().Flagged(pkgCache::Flag::NotSource) && Ver.ParentPkg().CurrentVer() != Ver) + priority = std::max(priority, static_cast(-1)); + else + priority = std::max(priority, static_cast(GetPriority(file.File()))); } - return priority == std::numeric_limits::min() ? 0 : priority; + return priority == std::numeric_limits::min() ? 0 : priority; } APT_PURE signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File) { @@ -408,11 +311,17 @@ bool ReadPinDir(pkgPolicy &Plcy,string Dir) if (DirectoryExists(Dir) == false) { - _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str()); + if (Dir != "/dev/null") + _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str()); return true; } + _error->PushToStack(); vector const List = GetListOfFilesInDir(Dir, "pref", true, true); + bool const PendingErrors = _error->PendingError(); + _error->MergeWithStack(); + if (PendingErrors) + return false; // Read the files for (vector::const_iterator I = List.begin(); I != List.end(); ++I) @@ -436,11 +345,11 @@ bool ReadPinFile(pkgPolicy &Plcy,string File) return true; FileFd Fd(File,FileFd::ReadOnly); - pkgTagFile TF(&Fd); - if (_error->PendingError() == true) + pkgTagFile TF(&Fd, pkgTagFile::SUPPORT_COMMENTS); + if (Fd.IsOpen() == false || Fd.Failed()) return false; - pkgUserTagSection Tags; + pkgTagSection Tags; while (TF.Step(Tags) == true) { // can happen when there are only comments in a record @@ -476,10 +385,13 @@ bool ReadPinFile(pkgPolicy &Plcy,string File) } for (; Word != End && isspace(*Word) != 0; Word++); - int priority = Tags.FindI("Pin-Priority", 0); + _error->PushToStack(); + int const priority = Tags.FindI("Pin-Priority", 0); + bool const newError = _error->PendingError(); + _error->MergeWithStack(); if (priority < std::numeric_limits::min() || priority > std::numeric_limits::max() || - _error->PendingError()) { + newError) { return _error->Error(_("%s: Value %s is outside the range of valid pin priorities (%d to %d)"), File.c_str(), Tags.FindS("Pin-Priority").c_str(), std::numeric_limits::min(),