X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/20ebd488ff29272654ab101d5ca25fa5fd4905f5..c5dac10c3dd6d8f54d97d3105803d07fa891fcd4:/apt-pkg/policy.cc?ds=sidebyside diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc index da72f193a..81fdb0431 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 @@ -23,9 +23,6 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ -#ifdef __GNUG__ -#pragma implementation "apt-pkg/policy.h" -#endif #include #include #include @@ -34,8 +31,16 @@ #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 @@ -83,10 +88,6 @@ bool pkgPolicy::InitDefaults() pkgVersionMatch Match(I->Data,I->Type); 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) @@ -118,20 +119,18 @@ bool pkgPolicy::InitDefaults() best package is. */ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator 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); + + // 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 @@ -178,7 +177,6 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg) break; } } - return Pref; } /*}}}*/ @@ -191,24 +189,24 @@ 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()); + 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; + P = &*I; if (P == 0) - P = Unmatched.insert(Unmatched.end()); + P = &*Unmatched.insert(Unmatched.end(),PkgPin()); } else { @@ -222,7 +220,106 @@ void pkgPolicy::CreatePin(pkgVersionMatch::MatchType Type,string Name, P->Data = Data; } /*}}}*/ +// Policy::GetMatch - Get the matching version for a package pin /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgCache::VerIterator pkgPolicy::GetMatch(pkgCache::PkgIterator 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()); +} + /*}}}*/ +// 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; + } + + return 0; +} + /*}}}*/ +// 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 (FileExists(Dir) == false) + { + _error->WarningE("FileExists",_("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()); + + // 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 @@ -242,12 +339,12 @@ bool ReadPinFile(pkgPolicy &Plcy,string File) if (_error->PendingError() == true) return false; - pkgTagSection Tags; + PreferenceSection Tags; while (TF.Step(Tags) == true) { 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 +371,20 @@ 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();