// -*- 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
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<config.h>
+
#include <apt-pkg/policy.h>
#include <apt-pkg/configuration.h>
+#include <apt-pkg/cachefilter.h>
#include <apt-pkg/tagfile.h>
#include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/sptr.h>
-
+
+#include <iostream>
+#include <sstream>
+
#include <apti18n.h>
/*}}}*/
+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];
// 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();
}
/*}}}*/
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..
signed Cur = 989;
StatusOverride = false;
for (vector<Pin>::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)
}
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;
}
// ---------------------------------------------------------------------
/* 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
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)
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;
}
/*}}}*/
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<PkgPin>::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<string> const List = GetListOfFilesInDir(Dir, "pref", true, true);
+
+ // Read the files
+ for (vector<string>::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
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);
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();
}
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();
projects / apt.git / blobdiff