// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: policy.cc,v 1.2 2001/02/20 07:03:17 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..
- SPtr<bool> Fixed = new bool[Cache->HeaderP->PackageFileCount];
+ SPtrArray<bool> Fixed = new bool[Cache->HeaderP->PackageFileCount];
memset(Fixed,0,sizeof(*Fixed)*Cache->HeaderP->PackageFileCount);
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++)
- {
- for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; VF++)
+ 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()->Flags & pkgCache::Flag::NotSource) == pkgCache::Flag::NotSource &&
+ 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)
{
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