// -*- 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
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/policy.h"
-#endif
#include <apt-pkg/policy.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/tagfile.h>
#include <apt-pkg/sptr.h>
#include <apti18n.h>
+
+#include <dirent.h>
+#include <sys/stat.h>
+#include <algorithm>
+#include <iostream>
+#include <sstream>
/*}}}*/
+using namespace std;
+
// Policy::Init - Startup and bind to a cache /*{{{*/
// ---------------------------------------------------------------------
/* Set the defaults for operation. The default mode with no loaded policy
}
// 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;
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)
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
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)
{
break;
}
}
-
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());
+ 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;
+ P = &*I;
if (P == 0)
- P = Unmatched.insert(Unmatched.end());
+ P = &*Unmatched.insert(Unmatched.end(),PkgPin());
}
else
{
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<string> 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<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 (_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