/* ######################################################################
Package Version Policy implementation
-
+
This is just a really simple wrapper around pkgVersionMatch with
some added goodies to manage the list of things..
-
- Priority Table:
-
- 1000 -> inf = Downgradeable priorities
- 1000 = The 'no downgrade' pseduo-status file
- 100 -> 1000 = Standard priorities
- 990 = Config file override package files
- 989 = Start for preference auto-priorities
- 500 = Default package files
- 100 = The status file
- 0 -> 100 = NotAutomatic sources like experimental
- -inf -> 0 = Never selected
-
+
+ See man apt_preferences for what value means what.
+
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
+#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 <apti18n.h>
+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/versionmatch.h>
+#include <apt-pkg/version.h>
+#include <ctype.h>
+#include <stddef.h>
+#include <string.h>
+#include <string>
+#include <vector>
#include <iostream>
#include <sstream>
+
+#include <apti18n.h>
/*}}}*/
using namespace std;
// ---------------------------------------------------------------------
/* 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)
+pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(nullptr), VerPins(nullptr),
+ PFPriority(nullptr), Cache(Owner), d(NULL)
{
+ if (Owner == 0)
+ return;
PFPriority = new signed short[Owner->Head().PackageFileCount];
Pins = new Pin[Owner->Head().PackageCount];
+ VerPins = new Pin[Owner->Head().VersionCount];
for (unsigned long I = 0; I != Owner->Head().PackageCount; I++)
Pins[I].Type = pkgVersionMatch::None;
+ for (unsigned long I = 0; I != Owner->Head().VersionCount; I++)
+ VerPins[I].Type = pkgVersionMatch::None;
// 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 (vm.ExpressionMatches(DefRel, F.Archive()) ||
+ vm.ExpressionMatches(DefRel, F.Codename()) ||
+ vm.ExpressionMatches(DefRel, F.Version()) ||
+ (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)
+ if (I.Flagged(pkgCache::Flag::NotSource))
PFPriority[I->ID] = 100;
- else
- if ((I->Flags & pkgCache::Flag::NotAutomatic) == pkgCache::Flag::NotAutomatic)
- PFPriority[I->ID] = 1;
+ else if (I.Flagged(pkgCache::Flag::ButAutomaticUpgrades))
+ PFPriority[I->ID] = 100;
+ else if (I.Flagged(pkgCache::Flag::NotAutomatic))
+ PFPriority[I->ID] = 1;
}
// Apply the defaults..
- SPtrArray<bool> Fixed = new bool[Cache->HeaderP->PackageFileCount];
- memset(Fixed,0,sizeof(*Fixed)*Cache->HeaderP->PackageFileCount);
- signed Cur = 989;
+ std::unique_ptr<bool[]> Fixed(new bool[Cache->HeaderP->PackageFileCount]);
+ memset(Fixed.get(),0,sizeof(Fixed[0])*Cache->HeaderP->PackageFileCount);
StatusOverride = false;
- for (vector<Pin>::const_iterator I = Defaults.begin(); I != Defaults.end();
- I++, Cur--)
+ for (vector<Pin>::const_iterator I = Defaults.begin(); I != Defaults.end(); ++I)
{
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)
+ if (Fixed[F->ID] == false && Match.FileMatch(F) == true)
{
- if (I->Priority != 0 && I->Priority > 0)
- Cur = I->Priority;
-
- if (I->Priority < 0)
- PFPriority[F->ID] = I->Priority;
- else
- PFPriority[F->ID] = Cur;
-
- if (PFPriority[F->ID] > 1000)
+ PFPriority[F->ID] = I->Priority;
+
+ if (PFPriority[F->ID] >= 1000)
StatusOverride = true;
-
+
Fixed[F->ID] = true;
- }
- }
+ }
+ }
}
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;
-
- return true;
+ for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F != Cache->FileEnd(); ++F)
+ std::clog << "Prio of " << F.FileName() << ' ' << PFPriority[F->ID] << std::endl;
+
+ return true;
}
/*}}}*/
// 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::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);
-
- /* 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 second pseduo-status file is at prio 1000, above which will permit
- the user to force-downgrade things.
-
- 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.
- */
- for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; Ver++)
- {
- 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 &&
- Pkg.CurrentVer() != Ver)
- continue;
-
- signed Prio = PFPriority[VF.File()->ID];
- if (Prio > Max)
- {
- Pref = Ver;
- Max = Prio;
- }
- }
-
- if (Pkg.CurrentVer() == Ver && Max < 1000)
- {
- /* 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;
- }
+ 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, true);
+
+ 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;
+
+ candPriority = priority;
+ cand = ver;
}
- return Pref;
+
+ return cand;
}
/*}}}*/
// Policy::CreatePin - Create an entry in the pin table.. /*{{{*/
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<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(),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 - beware of package names looking like wildcards!
+ // TODO: Maybe we should always prefer specific pins over non-specific ones.
+ if ((Name[0] == '/' && Name[Name.length() - 1] == '/') || Name.find_first_of("*[?") != string::npos)
+ {
+ pkgVersionMatch match(Data, Type);
+ for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() != true; ++G)
+ if (Name != G.Name() && 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;
+
+ // 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)
+ {
+ if (Match.VersionMatches(Ver)) {
+ Pin *VP = VerPins + Ver->ID;
+ if (VP->Type == pkgVersionMatch::None)
+ *VP = *P;
+ }
+ }
+ }
+ }
+
+ 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 /*{{{*/
// ---------------------------------------------------------------------
/* */
-signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
+APT_PURE 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;
+}
+APT_PURE signed short pkgPolicy::GetPriority(pkgCache::VerIterator const &Ver, bool ConsiderFiles)
+{
+ if (VerPins[Ver->ID].Type != pkgVersionMatch::None)
+ return VerPins[Ver->ID].Priority;
+ if (!ConsiderFiles)
+ return 0;
+
+ // priorities are short ints, but we want to pick a value outside the valid range here
+ auto priority = std::numeric_limits<signed int>::min();
+ for (pkgCache::VerFileIterator file = Ver.FileList(); file.end() == false; file++)
+ {
+ /* 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 (file.File().Flagged(pkgCache::Flag::NotSource) && Ver.ParentPkg().CurrentVer() != Ver)
+ priority = std::max(priority, static_cast<decltype(priority)>(-1));
+ else
+ priority = std::max(priority, static_cast<decltype(priority)>(GetPriority(file.File())));
+ }
+
+ return priority == std::numeric_limits<decltype(priority)>::min() ? 0 : priority;
+}
+APT_PURE signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File)
+{
+ return PFPriority[File->ID];
}
/*}}}*/
-// PreferenceSection class - Overriding the default TrimRecord method /*{{{*/
+// ReadPinDir - Load the pin files from this dir into a Policy /*{{{*/
// ---------------------------------------------------------------------
-/* 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
+/* 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)
{
- void TrimRecord(bool BeforeRecord, const char* &End)
+ if (Dir.empty() == true)
+ Dir = _config->FindDir("Dir::Etc::PreferencesParts", "/dev/null");
+
+ if (DirectoryExists(Dir) == false)
{
- for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
- if (Stop[0] == '#')
- Stop = (const char*) memchr(Stop,'\n',End-Stop);
+ if (APT::String::Endswith(Dir, "/dev/null") == false)
+ _error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str());
+ return true;
}
-};
+
+ _error->PushToStack();
+ vector<string> const List = GetListOfFilesInDir(Dir, "pref", true, true);
+ bool const PendingErrors = _error->PendingError();
+ _error->MergeWithStack();
+ if (PendingErrors)
+ return false;
+
+ // 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 /*{{{*/
// ---------------------------------------------------------------------
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);
- pkgTagFile TF(&Fd);
- if (_error->PendingError() == true)
+ pkgTagFile TF(&Fd, pkgTagFile::SUPPORT_COMMENTS);
+ if (Fd.IsOpen() == false || Fd.Failed())
return false;
-
- PreferenceSection Tags;
+
+ pkgTagSection 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++);
- short 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<short>::min() ||
+ priority > std::numeric_limits<short>::max() ||
+ 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<short>::min(),
+ std::numeric_limits<short>::max());
+ }
if (priority == 0)
{
- _error->Warning(_("No priority (or zero) specified for pin"));
- continue;
+ return _error->Error(_("No priority (or zero) specified for pin"));
}
istringstream s(Name);
return true;
}
/*}}}*/
+
+pkgPolicy::~pkgPolicy() {delete [] PFPriority; delete [] Pins; delete [] VerPins; }
projects / apt.git / blobdiff