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releasing version 0.8.16~exp11
[apt.git] / apt-pkg / algorithms.cc
diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index 82ea19c935345f34843cb52136ea3154c76a05a9..f7a333606e572332d46ec73bb454d846b713de56 100644 (file)
--- a/apt-pkg/algorithms.cc
+++ b/apt-pkg/algorithms.cc
@@ -14,21 +14,26 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/algorithms.h"
-#endif 
+#include <config.h>
+
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
-#include <apt-pkg/pkgsystem.h>
 #include <apt-pkg/version.h>
 #include <apt-pkg/sptr.h>
 #include <apt-pkg/version.h>
 #include <apt-pkg/sptr.h>
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/edsp.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/progress.h>
 
 
-    
-#include <apti18n.h>
 #include <sys/types.h>
 #include <sys/types.h>
-#include <regex.h>
+#include <cstdlib>
+#include <algorithm>
 #include <iostream>
 #include <iostream>
+#include <stdio.h>
+
+#include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 
                                                                        /*}}}*/
 using namespace std;
 
@@ -40,7 +45,8 @@ pkgProblemResolver *pkgProblemResolver::This = 0;
    this is not necessary since the pkgCaches are fully shared now. */
 pkgSimulate::pkgSimulate(pkgDepCache *Cache) : pkgPackageManager(Cache),
                            iPolicy(Cache),
    this is not necessary since the pkgCaches are fully shared now. */
 pkgSimulate::pkgSimulate(pkgDepCache *Cache) : pkgPackageManager(Cache),
                            iPolicy(Cache),
-                            Sim(&Cache->GetCache(),&iPolicy)
+                           Sim(&Cache->GetCache(),&iPolicy),
+                           group(Sim)
 {
    Sim.Init(0);
    Flags = new unsigned char[Cache->Head().PackageCount];
 {
    Sim.Init(0);
    Flags = new unsigned char[Cache->Head().PackageCount];
@@ -60,7 +66,7 @@ void pkgSimulate::Describe(PkgIterator Pkg,ostream &out,bool Current,bool Candid
 {
    VerIterator Ver(Sim);
  
 {
    VerIterator Ver(Sim);
  
-   out << Pkg.Name();
+   out << Pkg.FullName(true);
 
    if (Current == true)
    {
 
    if (Current == true)
    {
@@ -85,15 +91,15 @@ void pkgSimulate::Describe(PkgIterator Pkg,ostream &out,bool Current,bool Candid
 bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/)
 {
    // Adapt the iterator
 bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/)
 {
    // Adapt the iterator
-   PkgIterator Pkg = Sim.FindPkg(iPkg.Name());
+   PkgIterator Pkg = Sim.FindPkg(iPkg.Name(), iPkg.Arch());
    Flags[Pkg->ID] = 1;
    
    cout << "Inst ";
    Describe(Pkg,cout,true,true);
    Sim.MarkInstall(Pkg,false);
    Flags[Pkg->ID] = 1;
    
    cout << "Inst ";
    Describe(Pkg,cout,true,true);
    Sim.MarkInstall(Pkg,false);
-   
+
    // Look for broken conflicts+predepends.
    // Look for broken conflicts+predepends.
-   for (PkgIterator I = Sim.PkgBegin(); I.end() == false; I++)
+   for (PkgIterator I = Sim.PkgBegin(); I.end() == false; ++I)
    {
       if (Sim[I].InstallVer == 0)
         continue;
    {
       if (Sim[I].InstallVer == 0)
         continue;
@@ -103,15 +109,14 @@ bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/)
         DepIterator Start;
         DepIterator End;
         D.GlobOr(Start,End);
         DepIterator Start;
         DepIterator End;
         D.GlobOr(Start,End);
-        if (Start->Type == pkgCache::Dep::Conflicts ||
-            Start->Type == pkgCache::Dep::Obsoletes ||
+        if (Start.IsNegative() == true ||
             End->Type == pkgCache::Dep::PreDepends)
          {
            if ((Sim[End] & pkgDepCache::DepGInstall) == 0)
            {
             End->Type == pkgCache::Dep::PreDepends)
          {
            if ((Sim[End] & pkgDepCache::DepGInstall) == 0)
            {
-              cout << " [" << I.Name() << " on " << Start.TargetPkg().Name() << ']';
+              cout << " [" << I.FullName(false) << " on " << Start.TargetPkg().FullName(false) << ']';
               if (Start->Type == pkgCache::Dep::Conflicts)
               if (Start->Type == pkgCache::Dep::Conflicts)
-                 _error->Error("Fatal, conflicts violated %s",I.Name());
+                 _error->Error("Fatal, conflicts violated %s",I.FullName(false).c_str());
            }       
         }
       }      
            }       
         }
       }      
@@ -132,33 +137,35 @@ bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/)
 bool pkgSimulate::Configure(PkgIterator iPkg)
 {
    // Adapt the iterator
 bool pkgSimulate::Configure(PkgIterator iPkg)
 {
    // Adapt the iterator
-   PkgIterator Pkg = Sim.FindPkg(iPkg.Name());
+   PkgIterator Pkg = Sim.FindPkg(iPkg.Name(), iPkg.Arch());
    
    Flags[Pkg->ID] = 2;
    
    Flags[Pkg->ID] = 2;
-//   Sim.MarkInstall(Pkg,false);
+
    if (Sim[Pkg].InstBroken() == true)
    {
    if (Sim[Pkg].InstBroken() == true)
    {
-      cout << "Conf " << Pkg.Name() << " broken" << endl;
+      cout << "Conf " << Pkg.FullName(false) << " broken" << endl;
 
       Sim.Update();
       
       // Print out each package and the failed dependencies
 
       Sim.Update();
       
       // Print out each package and the failed dependencies
-      for (pkgCache::DepIterator D = Sim[Pkg].InstVerIter(Sim).DependsList(); D.end() == false; D++)
+      for (pkgCache::DepIterator D = Sim[Pkg].InstVerIter(Sim).DependsList(); D.end() == false; ++D)
       {
         if (Sim.IsImportantDep(D) == false || 
             (Sim[D] & pkgDepCache::DepInstall) != 0)
            continue;
         
         if (D->Type == pkgCache::Dep::Obsoletes)
       {
         if (Sim.IsImportantDep(D) == false || 
             (Sim[D] & pkgDepCache::DepInstall) != 0)
            continue;
         
         if (D->Type == pkgCache::Dep::Obsoletes)
-           cout << " Obsoletes:" << D.TargetPkg().Name();
+           cout << " Obsoletes:" << D.TargetPkg().FullName(false);
         else if (D->Type == pkgCache::Dep::Conflicts)
         else if (D->Type == pkgCache::Dep::Conflicts)
-           cout << " Conflicts:" << D.TargetPkg().Name();
+           cout << " Conflicts:" << D.TargetPkg().FullName(false);
+        else if (D->Type == pkgCache::Dep::DpkgBreaks)
+           cout << " Breaks:" << D.TargetPkg().FullName(false);
         else
         else
-           cout << " Depends:" << D.TargetPkg().Name();
+           cout << " Depends:" << D.TargetPkg().FullName(false);
       }            
       cout << endl;
 
       }            
       cout << endl;
 
-      _error->Error("Conf Broken %s",Pkg.Name());
+      _error->Error("Conf Broken %s",Pkg.FullName(false).c_str());
    }   
    else
    {
    }   
    else
    {
@@ -180,10 +187,11 @@ bool pkgSimulate::Configure(PkgIterator iPkg)
 bool pkgSimulate::Remove(PkgIterator iPkg,bool Purge)
 {
    // Adapt the iterator
 bool pkgSimulate::Remove(PkgIterator iPkg,bool Purge)
 {
    // Adapt the iterator
-   PkgIterator Pkg = Sim.FindPkg(iPkg.Name());
+   PkgIterator Pkg = Sim.FindPkg(iPkg.Name(), iPkg.Arch());
 
    Flags[Pkg->ID] = 3;
    Sim.MarkDelete(Pkg);
 
    Flags[Pkg->ID] = 3;
    Sim.MarkDelete(Pkg);
+
    if (Purge == true)
       cout << "Purg ";
    else
    if (Purge == true)
       cout << "Purg ";
    else
@@ -204,12 +212,12 @@ bool pkgSimulate::Remove(PkgIterator iPkg,bool Purge)
 void pkgSimulate::ShortBreaks()
 {
    cout << " [";
 void pkgSimulate::ShortBreaks()
 {
    cout << " [";
-   for (PkgIterator I = Sim.PkgBegin(); I.end() == false; I++)
+   for (PkgIterator I = Sim.PkgBegin(); I.end() == false; ++I)
    {
       if (Sim[I].InstBroken() == true)
       {
         if (Flags[I->ID] == 0)
    {
       if (Sim[I].InstBroken() == true)
       {
         if (Flags[I->ID] == 0)
-           cout << I.Name() << ' ';
+           cout << I.FullName(false) << ' ';
 /*      else
            cout << I.Name() << "! ";*/
       }      
 /*      else
            cout << I.Name() << "! ";*/
       }      
@@ -224,7 +232,9 @@ void pkgSimulate::ShortBreaks()
    the necessary calculations to deal with the problems. */
 bool pkgApplyStatus(pkgDepCache &Cache)
 {
    the necessary calculations to deal with the problems. */
 bool pkgApplyStatus(pkgDepCache &Cache)
 {
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   pkgDepCache::ActionGroup group(Cache);
+
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (I->VersionList == 0)
         continue;
    {
       if (I->VersionList == 0)
         continue;
@@ -234,16 +244,16 @@ bool pkgApplyStatus(pkgDepCache &Cache)
          I->InstState == pkgCache::State::HoldReInstReq)
       {
         if (I->CurrentVer != 0 && I.CurrentVer().Downloadable() == true)
          I->InstState == pkgCache::State::HoldReInstReq)
       {
         if (I->CurrentVer != 0 && I.CurrentVer().Downloadable() == true)
-           Cache.MarkKeep(I);
+           Cache.MarkKeep(I, false, false);
         else
         {
            // Is this right? Will dpkg choke on an upgrade?
            if (Cache[I].CandidateVer != 0 &&
                 Cache[I].CandidateVerIter(Cache).Downloadable() == true)
         else
         {
            // Is this right? Will dpkg choke on an upgrade?
            if (Cache[I].CandidateVer != 0 &&
                 Cache[I].CandidateVerIter(Cache).Downloadable() == true)
-              Cache.MarkInstall(I);
+              Cache.MarkInstall(I, false, 0, false);
            else
               return _error->Error(_("The package %s needs to be reinstalled, "
            else
               return _error->Error(_("The package %s needs to be reinstalled, "
-                                   "but I can't find an archive for it."),I.Name());
+                                   "but I can't find an archive for it."),I.FullName(true).c_str());
         }
         
         continue;
         }
         
         continue;
@@ -255,14 +265,16 @@ bool pkgApplyStatus(pkgDepCache &Cache)
            re-unpacked (probably) */
         case pkgCache::State::UnPacked:
         case pkgCache::State::HalfConfigured:
            re-unpacked (probably) */
         case pkgCache::State::UnPacked:
         case pkgCache::State::HalfConfigured:
+        case pkgCache::State::TriggersAwaited:
+        case pkgCache::State::TriggersPending:
         if ((I->CurrentVer != 0 && I.CurrentVer().Downloadable() == true) ||
             I.State() != pkgCache::PkgIterator::NeedsUnpack)
         if ((I->CurrentVer != 0 && I.CurrentVer().Downloadable() == true) ||
             I.State() != pkgCache::PkgIterator::NeedsUnpack)
-           Cache.MarkKeep(I);
+           Cache.MarkKeep(I, false, false);
         else
         {
            if (Cache[I].CandidateVer != 0 &&
                 Cache[I].CandidateVerIter(Cache).Downloadable() == true)
         else
         {
            if (Cache[I].CandidateVer != 0 &&
                 Cache[I].CandidateVerIter(Cache).Downloadable() == true)
-              Cache.MarkInstall(I);
+              Cache.MarkInstall(I, true, 0, false);
            else
               Cache.MarkDelete(I);
         }
            else
               Cache.MarkDelete(I);
         }
@@ -276,7 +288,7 @@ bool pkgApplyStatus(pkgDepCache &Cache)
         default:
         if (I->InstState != pkgCache::State::Ok)
            return _error->Error("The package %s is not ok and I "
         default:
         if (I->InstState != pkgCache::State::Ok)
            return _error->Error("The package %s is not ok and I "
-                                "don't know how to fix it!",I.Name());
+                                "don't know how to fix it!",I.FullName(false).c_str());
       }
    }
    return true;
       }
    }
    return true;
@@ -288,14 +300,16 @@ bool pkgApplyStatus(pkgDepCache &Cache)
    on the result. */
 bool pkgFixBroken(pkgDepCache &Cache)
 {
    on the result. */
 bool pkgFixBroken(pkgDepCache &Cache)
 {
+   pkgDepCache::ActionGroup group(Cache);
+
    // Auto upgrade all broken packages
    // Auto upgrade all broken packages
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       if (Cache[I].NowBroken() == true)
       if (Cache[I].NowBroken() == true)
-        Cache.MarkInstall(I,true);
+        Cache.MarkInstall(I, true, 0, false);
    
    /* Fix packages that are in a NeedArchive state but don't have a
       downloadable install version */
    
    /* Fix packages that are in a NeedArchive state but don't have a
       downloadable install version */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (I.State() != pkgCache::PkgIterator::NeedsUnpack ||
          Cache[I].Delete() == true)
    {
       if (I.State() != pkgCache::PkgIterator::NeedsUnpack ||
          Cache[I].Delete() == true)
@@ -304,7 +318,7 @@ bool pkgFixBroken(pkgDepCache &Cache)
       if (Cache[I].InstVerIter(Cache).Downloadable() == false)
         continue;
 
       if (Cache[I].InstVerIter(Cache).Downloadable() == false)
         continue;
 
-      Cache.MarkInstall(I,true);      
+      Cache.MarkInstall(I, true, 0, false);
    }
    
    pkgProblemResolver Fix(&Cache);
    }
    
    pkgProblemResolver Fix(&Cache);
@@ -321,35 +335,50 @@ bool pkgFixBroken(pkgDepCache &Cache)
  */
 bool pkgDistUpgrade(pkgDepCache &Cache)
 {
  */
 bool pkgDistUpgrade(pkgDepCache &Cache)
 {
+   std::string const solver = _config->Find("APT::Solver", "internal");
+   if (solver != "internal") {
+      OpTextProgress Prog(*_config);
+      return EDSP::ResolveExternal(solver.c_str(), Cache, false, true, false, &Prog);
+   }
+
+   pkgDepCache::ActionGroup group(Cache);
+
+   /* Upgrade all installed packages first without autoinst to help the resolver
+      in versioned or-groups to upgrade the old solver instead of installing
+      a new one (if the old solver is not the first one [anymore]) */
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
+      if (I->CurrentVer != 0)
+        Cache.MarkInstall(I, false, 0, false);
+
    /* Auto upgrade all installed packages, this provides the basis 
       for the installation */
    /* Auto upgrade all installed packages, this provides the basis 
       for the installation */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       if (I->CurrentVer != 0)
       if (I->CurrentVer != 0)
-        Cache.MarkInstall(I,true);
+        Cache.MarkInstall(I, true, 0, false);
 
    /* Now, auto upgrade all essential packages - this ensures that
       the essential packages are present and working */
 
    /* Now, auto upgrade all essential packages - this ensures that
       the essential packages are present and working */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
       if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
-        Cache.MarkInstall(I,true);
+        Cache.MarkInstall(I, true, 0, false);
    
    /* We do it again over all previously installed packages to force 
       conflict resolution on them all. */
    
    /* We do it again over all previously installed packages to force 
       conflict resolution on them all. */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       if (I->CurrentVer != 0)
       if (I->CurrentVer != 0)
-        Cache.MarkInstall(I,false);
+        Cache.MarkInstall(I, false, 0, false);
 
    pkgProblemResolver Fix(&Cache);
 
    // Hold back held packages.
    if (_config->FindB("APT::Ignore-Hold",false) == false)
    {
 
    pkgProblemResolver Fix(&Cache);
 
    // Hold back held packages.
    if (_config->FindB("APT::Ignore-Hold",false) == false)
    {
-      for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+      for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       {
         if (I->SelectedState == pkgCache::State::Hold)
         {
            Fix.Protect(I);
       {
         if (I->SelectedState == pkgCache::State::Hold)
         {
            Fix.Protect(I);
-           Cache.MarkKeep(I);
+           Cache.MarkKeep(I, false, false);
         }
       }
    }
         }
       }
    }
@@ -364,13 +393,21 @@ bool pkgDistUpgrade(pkgDepCache &Cache)
    to install packages not marked for install */
 bool pkgAllUpgrade(pkgDepCache &Cache)
 {
    to install packages not marked for install */
 bool pkgAllUpgrade(pkgDepCache &Cache)
 {
+   std::string const solver = _config->Find("APT::Solver", "internal");
+   if (solver != "internal") {
+      OpTextProgress Prog(*_config);
+      return EDSP::ResolveExternal(solver.c_str(), Cache, true, false, false, &Prog);
+   }
+
+   pkgDepCache::ActionGroup group(Cache);
+
    pkgProblemResolver Fix(&Cache);
 
    if (Cache.BrokenCount() != 0)
       return false;
    
    // Upgrade all installed packages
    pkgProblemResolver Fix(&Cache);
 
    if (Cache.BrokenCount() != 0)
       return false;
    
    // Upgrade all installed packages
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (Cache[I].Install() == true)
         Fix.Protect(I);
    {
       if (Cache[I].Install() == true)
         Fix.Protect(I);
@@ -380,7 +417,7 @@ bool pkgAllUpgrade(pkgDepCache &Cache)
            continue;
       
       if (I->CurrentVer != 0 && Cache[I].InstallVer != 0)
            continue;
       
       if (I->CurrentVer != 0 && Cache[I].InstallVer != 0)
-        Cache.MarkInstall(I,false);
+        Cache.MarkInstall(I, false, 0, false);
    }
       
    return Fix.ResolveByKeep();
    }
       
    return Fix.ResolveByKeep();
@@ -393,6 +430,8 @@ bool pkgAllUpgrade(pkgDepCache &Cache)
    the package is restored. */
 bool pkgMinimizeUpgrade(pkgDepCache &Cache)
 {   
    the package is restored. */
 bool pkgMinimizeUpgrade(pkgDepCache &Cache)
 {   
+   pkgDepCache::ActionGroup group(Cache);
+
    if (Cache.BrokenCount() != 0)
       return false;
    
    if (Cache.BrokenCount() != 0)
       return false;
    
@@ -402,16 +441,16 @@ bool pkgMinimizeUpgrade(pkgDepCache &Cache)
    do
    {
       Change = false;
    do
    {
       Change = false;
-      for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+      for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       {
         // Not interesting
         if (Cache[I].Upgrade() == false || Cache[I].NewInstall() == true)
            continue;
 
         // Keep it and see if that is OK
       {
         // Not interesting
         if (Cache[I].Upgrade() == false || Cache[I].NewInstall() == true)
            continue;
 
         // Keep it and see if that is OK
-        Cache.MarkKeep(I);
+        Cache.MarkKeep(I, false, false);
         if (Cache.BrokenCount() != 0)
         if (Cache.BrokenCount() != 0)
-           Cache.MarkInstall(I,false);
+           Cache.MarkInstall(I, false, 0, false);
         else
         {
            // If keep didnt actually do anything then there was no change..
         else
         {
            // If keep didnt actually do anything then there was no change..
@@ -419,7 +458,7 @@ bool pkgMinimizeUpgrade(pkgDepCache &Cache)
               Change = true;
         }       
       }      
               Change = true;
         }       
       }      
-      Count++;
+      ++Count;
    }
    while (Change == true && Count < 10);
 
    }
    while (Change == true && Count < 10);
 
@@ -429,7 +468,6 @@ bool pkgMinimizeUpgrade(pkgDepCache &Cache)
    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/
-
 // ProblemResolver::pkgProblemResolver - Constructor                   /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // ProblemResolver::pkgProblemResolver - Constructor                   /*{{{*/
 // ---------------------------------------------------------------------
 /* */
@@ -476,43 +514,76 @@ void pkgProblemResolver::MakeScores()
    unsigned long Size = Cache.Head().PackageCount;
    memset(Scores,0,sizeof(*Scores)*Size);
 
    unsigned long Size = Cache.Head().PackageCount;
    memset(Scores,0,sizeof(*Scores)*Size);
 
+   // Important Required Standard Optional Extra
+   signed short PrioMap[] = {
+      0,
+      (signed short) _config->FindI("pkgProblemResolver::Scores::Important",3),
+      (signed short) _config->FindI("pkgProblemResolver::Scores::Required",2),
+      (signed short) _config->FindI("pkgProblemResolver::Scores::Standard",1),
+      (signed short) _config->FindI("pkgProblemResolver::Scores::Optional",-1),
+      (signed short) _config->FindI("pkgProblemResolver::Scores::Extra",-2)
+   };
+   signed short PrioEssentials = _config->FindI("pkgProblemResolver::Scores::Essentials",100);
+   signed short PrioInstalledAndNotObsolete = _config->FindI("pkgProblemResolver::Scores::NotObsolete",1);
+   signed short PrioDepends = _config->FindI("pkgProblemResolver::Scores::Depends",1);
+   signed short PrioRecommends = _config->FindI("pkgProblemResolver::Scores::Recommends",1);
+   signed short AddProtected = _config->FindI("pkgProblemResolver::Scores::AddProtected",10000);
+   signed short AddEssential = _config->FindI("pkgProblemResolver::Scores::AddEssential",5000);
+
+   if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
+      clog << "Settings used to calculate pkgProblemResolver::Scores::" << endl
+         << "  Important => " << PrioMap[1] << endl
+         << "  Required => " << PrioMap[2] << endl
+         << "  Standard => " << PrioMap[3] << endl
+         << "  Optional => " << PrioMap[4] << endl
+         << "  Extra => " << PrioMap[5] << endl
+         << "  Essentials => " << PrioEssentials << endl
+         << "  InstalledAndNotObsolete => " << PrioInstalledAndNotObsolete << endl
+         << "  Depends => " << PrioDepends << endl
+         << "  Recommends => " << PrioRecommends << endl
+         << "  AddProtected => " << AddProtected << endl
+         << "  AddEssential => " << AddEssential << endl;
+
    // Generate the base scores for a package based on its properties
    // Generate the base scores for a package based on its properties
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (Cache[I].InstallVer == 0)
         continue;
       
       signed short &Score = Scores[I->ID];
       
    {
       if (Cache[I].InstallVer == 0)
         continue;
       
       signed short &Score = Scores[I->ID];
       
-      /* This is arbitary, it should be high enough to elevate an
+      /* This is arbitrary, it should be high enough to elevate an
          essantial package above most other packages but low enough
         to allow an obsolete essential packages to be removed by
         a conflicts on a powerfull normal package (ie libc6) */
       if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
          essantial package above most other packages but low enough
         to allow an obsolete essential packages to be removed by
         a conflicts on a powerfull normal package (ie libc6) */
       if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
-        Score += 100;
+        Score += PrioEssentials;
 
       // We transform the priority
 
       // We transform the priority
-      // Important Required Standard Optional Extra
-      signed short PrioMap[] = {0,3,2,1,-1,-2};
       if (Cache[I].InstVerIter(Cache)->Priority <= 5)
         Score += PrioMap[Cache[I].InstVerIter(Cache)->Priority];
       
       /* This helps to fix oddball problems with conflicting packages
       if (Cache[I].InstVerIter(Cache)->Priority <= 5)
         Score += PrioMap[Cache[I].InstVerIter(Cache)->Priority];
       
       /* This helps to fix oddball problems with conflicting packages
-         on the same level. We enhance the score of installed packages */
-      if (I->CurrentVer != 0)
-        Score += 1;
+         on the same level. We enhance the score of installed packages 
+        if those are not obsolete
+      */
+      if (I->CurrentVer != 0 && Cache[I].CandidateVer != 0 && Cache[I].CandidateVerIter(Cache).Downloadable())
+        Score += PrioInstalledAndNotObsolete;
    }
 
    // Now that we have the base scores we go and propogate dependencies
    }
 
    // Now that we have the base scores we go and propogate dependencies
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (Cache[I].InstallVer == 0)
         continue;
       
    {
       if (Cache[I].InstallVer == 0)
         continue;
       
-      for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); D.end() == false; D++)
+      for (pkgCache::DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); D.end() == false; ++D)
       {
       {
-        if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
-           Scores[D.TargetPkg()->ID]++;
+        if (D->Type == pkgCache::Dep::Depends || 
+            D->Type == pkgCache::Dep::PreDepends)
+           Scores[D.TargetPkg()->ID] += PrioDepends;
+        else if (D->Type == pkgCache::Dep::Recommends)
+           Scores[D.TargetPkg()->ID] += PrioRecommends;
       }
    }   
    
       }
    }   
    
@@ -523,16 +594,18 @@ void pkgProblemResolver::MakeScores()
    /* Now we cause 1 level of dependency inheritance, that is we add the 
       score of the packages that depend on the target Package. This 
       fortifies high scoring packages */
    /* Now we cause 1 level of dependency inheritance, that is we add the 
       score of the packages that depend on the target Package. This 
       fortifies high scoring packages */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (Cache[I].InstallVer == 0)
         continue;
       
    {
       if (Cache[I].InstallVer == 0)
         continue;
       
-      for (pkgCache::DepIterator D = I.RevDependsList(); D.end() == false; D++)
+      for (pkgCache::DepIterator D = I.RevDependsList(); D.end() == false; ++D)
       {
         // Only do it for the install version
         if ((pkgCache::Version *)D.ParentVer() != Cache[D.ParentPkg()].InstallVer ||
       {
         // Only do it for the install version
         if ((pkgCache::Version *)D.ParentVer() != Cache[D.ParentPkg()].InstallVer ||
-            (D->Type != pkgCache::Dep::Depends && D->Type != pkgCache::Dep::PreDepends))
+            (D->Type != pkgCache::Dep::Depends && 
+             D->Type != pkgCache::Dep::PreDepends &&
+             D->Type != pkgCache::Dep::Recommends))
            continue;    
         
         Scores[I->ID] += abs(OldScores[D.ParentPkg()->ID]);
            continue;    
         
         Scores[I->ID] += abs(OldScores[D.ParentPkg()->ID]);
@@ -541,9 +614,9 @@ void pkgProblemResolver::MakeScores()
 
    /* Now we propogate along provides. This makes the packages that 
       provide important packages extremely important */
 
    /* Now we propogate along provides. This makes the packages that 
       provide important packages extremely important */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
    {
-      for (pkgCache::PrvIterator P = I.ProvidesList(); P.end() == false; P++)
+      for (pkgCache::PrvIterator P = I.ProvidesList(); P.end() == false; ++P)
       {
         // Only do it once per package
         if ((pkgCache::Version *)P.OwnerVer() != Cache[P.OwnerPkg()].InstallVer)
       {
         // Only do it once per package
         if ((pkgCache::Version *)P.OwnerVer() != Cache[P.OwnerPkg()].InstallVer)
@@ -554,13 +627,13 @@ void pkgProblemResolver::MakeScores()
 
    /* Protected things are pushed really high up. This number should put them
       ahead of everything */
 
    /* Protected things are pushed really high up. This number should put them
       ahead of everything */
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if ((Flags[I->ID] & Protected) != 0)
    {
       if ((Flags[I->ID] & Protected) != 0)
-        Scores[I->ID] += 10000;
+        Scores[I->ID] += AddProtected;
       if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
       if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
-        Scores[I->ID] += 5000;
-   }   
+        Scores[I->ID] += AddEssential;
+   }
 }
                                                                        /*}}}*/
 // ProblemResolver::DoUpgrade - Attempt to upgrade this package                /*{{{*/
 }
                                                                        /*}}}*/
 // ProblemResolver::DoUpgrade - Attempt to upgrade this package                /*{{{*/
@@ -569,6 +642,8 @@ void pkgProblemResolver::MakeScores()
    installable */
 bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
 {
    installable */
 bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
 {
+   pkgDepCache::ActionGroup group(Cache);
+
    if ((Flags[Pkg->ID] & Upgradable) == 0 || Cache[Pkg].Upgradable() == false)
       return false;
    if ((Flags[Pkg->ID] & Protected) == Protected)
    if ((Flags[Pkg->ID] & Upgradable) == 0 || Cache[Pkg].Upgradable() == false)
       return false;
    if ((Flags[Pkg->ID] & Protected) == Protected)
@@ -577,7 +652,7 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
    Flags[Pkg->ID] &= ~Upgradable;
    
    bool WasKept = Cache[Pkg].Keep();
    Flags[Pkg->ID] &= ~Upgradable;
    
    bool WasKept = Cache[Pkg].Keep();
-   Cache.MarkInstall(Pkg,false);
+   Cache.MarkInstall(Pkg, false, 0, false);
 
    // This must be a virtual package or something like that.
    if (Cache[Pkg].InstVerIter(Cache).end() == true)
 
    // This must be a virtual package or something like that.
    if (Cache[Pkg].InstVerIter(Cache).end() == true)
@@ -590,12 +665,10 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
       // Compute a single dependency element (glob or)
       pkgCache::DepIterator Start = D;
       pkgCache::DepIterator End = D;
       // Compute a single dependency element (glob or)
       pkgCache::DepIterator Start = D;
       pkgCache::DepIterator End = D;
-      unsigned char State = 0;
       for (bool LastOR = true; D.end() == false && LastOR == true;)
       {
       for (bool LastOR = true; D.end() == false && LastOR == true;)
       {
-        State |= Cache[D];
         LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
         LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
-        D++;
+        ++D;
         if (LastOR == true)
            End = D;
       }
         if (LastOR == true)
            End = D;
       }
@@ -616,7 +689,7 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
         if ((Flags[P->ID] & Protected) == Protected)
         {
            if (Debug == true)
         if ((Flags[P->ID] & Protected) == Protected)
         {
            if (Debug == true)
-              clog << "    Reinst Failed because of protected " << P.Name() << endl;
+              clog << "    Reinst Failed because of protected " << P.FullName(false) << endl;
            Fail = true;
         }      
         else
            Fail = true;
         }      
         else
@@ -627,7 +700,7 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
               if (DoUpgrade(P) == false)
               {
                  if (Debug == true)
               if (DoUpgrade(P) == false)
               {
                  if (Debug == true)
-                    clog << "    Reinst Failed because of " << P.Name() << endl;
+                    clog << "    Reinst Failed because of " << P.FullName(false) << endl;
                  Fail = true;
               }
               else
                  Fail = true;
               }
               else
@@ -640,19 +713,18 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
            {
               /* We let the algorithm deal with conflicts on its next iteration,
                it is much smarter than us */
            {
               /* We let the algorithm deal with conflicts on its next iteration,
                it is much smarter than us */
-              if (Start->Type == pkgCache::Dep::Conflicts || 
-                  Start->Type == pkgCache::Dep::Obsoletes)
+              if (Start.IsNegative() == true)
                   break;
               
               if (Debug == true)
                   break;
               
               if (Debug == true)
-                 clog << "    Reinst Failed early because of " << Start.TargetPkg().Name() << endl;
+                 clog << "    Reinst Failed early because of " << Start.TargetPkg().FullName(false) << endl;
               Fail = true;
            }     
         }
         
         if (Start == End)
            break;
               Fail = true;
            }     
         }
         
         if (Start == End)
            break;
-        Start++;
+        ++Start;
       }
       if (Fail == true)
         break;
       }
       if (Fail == true)
         break;
@@ -662,18 +734,31 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
    if (Fail == true)
    {
       if (WasKept == true)
    if (Fail == true)
    {
       if (WasKept == true)
-        Cache.MarkKeep(Pkg);
+        Cache.MarkKeep(Pkg, false, false);
       else
         Cache.MarkDelete(Pkg);
       return false;
    }    
    
    if (Debug == true)
       else
         Cache.MarkDelete(Pkg);
       return false;
    }    
    
    if (Debug == true)
-      clog << "  Re-Instated " << Pkg.Name() << endl;
+      clog << "  Re-Instated " << Pkg.FullName(false) << endl;
    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/
-// ProblemResolver::Resolve - Run the resolution pass                  /*{{{*/
+// ProblemResolver::Resolve - calls a resolver to fix the situation    /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgProblemResolver::Resolve(bool BrokenFix)
+{
+   std::string const solver = _config->Find("APT::Solver", "internal");
+   if (solver != "internal") {
+      OpTextProgress Prog(*_config);
+      return EDSP::ResolveExternal(solver.c_str(), Cache, false, false, false, &Prog);
+   }
+   return ResolveInternal(BrokenFix);
+}
+                                                                       /*}}}*/
+// ProblemResolver::ResolveInternal - Run the resolution pass          /*{{{*/
 // ---------------------------------------------------------------------
 /* This routines works by calculating a score for each package. The score
    is derived by considering the package's priority and all reverse 
 // ---------------------------------------------------------------------
 /* This routines works by calculating a score for each package. The score
    is derived by considering the package's priority and all reverse 
@@ -687,16 +772,16 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
  
    The BrokenFix flag enables a mode where the algorithm tries to 
    upgrade packages to advoid problems. */
  
    The BrokenFix flag enables a mode where the algorithm tries to 
    upgrade packages to advoid problems. */
-bool pkgProblemResolver::Resolve(bool BrokenFix)
+bool pkgProblemResolver::ResolveInternal(bool const BrokenFix)
 {
 {
-   unsigned long Size = Cache.Head().PackageCount;
+   pkgDepCache::ActionGroup group(Cache);
 
    // Record which packages are marked for install
    bool Again = false;
    do
    {
       Again = false;
 
    // Record which packages are marked for install
    bool Again = false;
    do
    {
       Again = false;
-      for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+      for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       {
         if (Cache[I].Install() == true)
            Flags[I->ID] |= PreInstalled;
       {
         if (Cache[I].Install() == true)
            Flags[I->ID] |= PreInstalled;
@@ -704,7 +789,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
         {
            if (Cache[I].InstBroken() == true && BrokenFix == true)
            {
         {
            if (Cache[I].InstBroken() == true && BrokenFix == true)
            {
-              Cache.MarkInstall(I,false);
+              Cache.MarkInstall(I, false, 0, false);
               if (Cache[I].Install() == true)
                  Again = true;
            }
               if (Cache[I].Install() == true)
                  Again = true;
            }
@@ -720,35 +805,40 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
       clog << "Starting" << endl;
    
    MakeScores();
       clog << "Starting" << endl;
    
    MakeScores();
-   
+
+   unsigned long const Size = Cache.Head().PackageCount;
+
    /* We have to order the packages so that the broken fixing pass 
       operates from highest score to lowest. This prevents problems when
       high score packages cause the removal of lower score packages that
       would cause the removal of even lower score packages. */
    SPtrArray<pkgCache::Package *> PList = new pkgCache::Package *[Size];
    pkgCache::Package **PEnd = PList;
    /* We have to order the packages so that the broken fixing pass 
       operates from highest score to lowest. This prevents problems when
       high score packages cause the removal of lower score packages that
       would cause the removal of even lower score packages. */
    SPtrArray<pkgCache::Package *> PList = new pkgCache::Package *[Size];
    pkgCache::Package **PEnd = PList;
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       *PEnd++ = I;
    This = this;
    qsort(PList,PEnd - PList,sizeof(*PList),&ScoreSort);
       *PEnd++ = I;
    This = this;
    qsort(PList,PEnd - PList,sizeof(*PList),&ScoreSort);
-   
-/* for (pkgCache::Package **K = PList; K != PEnd; K++)
-      if (Scores[(*K)->ID] != 0)
-      {
-        pkgCache::PkgIterator Pkg(Cache,*K);
-        clog << Scores[(*K)->ID] << ' ' << Pkg.Name() <<
-           ' ' << (pkgCache::Version *)Pkg.CurrentVer() << ' ' << 
-           Cache[Pkg].InstallVer << ' ' << Cache[Pkg].CandidateVer << endl;
-      } */
+
+   if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
+   {
+      clog << "Show Scores" << endl;
+      for (pkgCache::Package **K = PList; K != PEnd; K++)
+         if (Scores[(*K)->ID] != 0)
+         {
+           pkgCache::PkgIterator Pkg(Cache,*K);
+           clog << Scores[(*K)->ID] << ' ' << Pkg << std::endl;
+         }
+   }
 
    if (Debug == true)
       clog << "Starting 2" << endl;
 
    if (Debug == true)
       clog << "Starting 2" << endl;
-   
+
    /* Now consider all broken packages. For each broken package we either
       remove the package or fix it's problem. We do this once, it should
       not be possible for a loop to form (that is a < b < c and fixing b by
       changing a breaks c) */
    bool Change = true;
    /* Now consider all broken packages. For each broken package we either
       remove the package or fix it's problem. We do this once, it should
       not be possible for a loop to form (that is a < b < c and fixing b by
       changing a breaks c) */
    bool Change = true;
+   bool const TryFixByInstall = _config->FindB("pkgProblemResolver::FixByInstall", true);
    for (int Counter = 0; Counter != 10 && Change == true; Counter++)
    {
       Change = false;
    for (int Counter = 0; Counter != 10 && Change == true; Counter++)
    {
       Change = false;
@@ -765,30 +855,30 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
             (Flags[I->ID] & ReInstateTried) == 0)
         {
            if (Debug == true)
             (Flags[I->ID] & ReInstateTried) == 0)
         {
            if (Debug == true)
-              clog << " Try to Re-Instate " << I.Name() << endl;
+              clog << " Try to Re-Instate (" << Counter << ") " << I.FullName(false) << endl;
            unsigned long OldBreaks = Cache.BrokenCount();
            pkgCache::Version *OldVer = Cache[I].InstallVer;
            Flags[I->ID] &= ReInstateTried;
            
            unsigned long OldBreaks = Cache.BrokenCount();
            pkgCache::Version *OldVer = Cache[I].InstallVer;
            Flags[I->ID] &= ReInstateTried;
            
-           Cache.MarkInstall(I,false);
+           Cache.MarkInstall(I, false, 0, false);
            if (Cache[I].InstBroken() == true || 
                OldBreaks < Cache.BrokenCount())
            {
               if (OldVer == 0)
                  Cache.MarkDelete(I);
               else
            if (Cache[I].InstBroken() == true || 
                OldBreaks < Cache.BrokenCount())
            {
               if (OldVer == 0)
                  Cache.MarkDelete(I);
               else
-                 Cache.MarkKeep(I);
+                 Cache.MarkKeep(I, false, false);
            }       
            else
               if (Debug == true)
            }       
            else
               if (Debug == true)
-                 clog << "Re-Instated " << I.Name() << " (" << OldBreaks << " vs " << Cache.BrokenCount() << ')' << endl;
+                 clog << "Re-Instated " << I.FullName(false) << " (" << OldBreaks << " vs " << Cache.BrokenCount() << ')' << endl;
         }
            
         if (Cache[I].InstallVer == 0 || Cache[I].InstBroken() == false)
            continue;
         
         if (Debug == true)
         }
            
         if (Cache[I].InstallVer == 0 || Cache[I].InstBroken() == false)
            continue;
         
         if (Debug == true)
-           cout << "Investigating " << I.Name() << endl;
+           clog << "Investigating (" << Counter << ") " << I << endl;
         
         // Isolate the problem dependency
         PackageKill KillList[100];
         
         // Isolate the problem dependency
         PackageKill KillList[100];
@@ -806,23 +896,23 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
            if (Start == End)
            {
               // Decide what to do
            if (Start == End)
            {
               // Decide what to do
-              if (InOr == true)
+              if (InOr == true && OldEnd == LEnd)
               {
               {
-                 if (OldEnd == LEnd && OrOp == OrRemove)
+                 if (OrOp == OrRemove)
                  {
                     if ((Flags[I->ID] & Protected) != Protected)
                     {
                        if (Debug == true)
                  {
                     if ((Flags[I->ID] & Protected) != Protected)
                     {
                        if (Debug == true)
-                          clog << "  Or group remove for " << I.Name() << endl;
+                          clog << "  Or group remove for " << I.FullName(false) << endl;
                        Cache.MarkDelete(I);
                        Change = true;
                        Cache.MarkDelete(I);
                        Change = true;
-                    }               
-                 }               
-                 if (OldEnd == LEnd && OrOp == OrKeep)
+                    }
+                 }
+                 else if (OrOp == OrKeep)
                  {
                     if (Debug == true)
                  {
                     if (Debug == true)
-                       clog << "  Or group keep for " << I.Name() << endl;
-                    Cache.MarkKeep(I);
+                       clog << "  Or group keep for " << I.FullName(false) << endl;
+                    Cache.MarkKeep(I, false, false);
                     Change = true;
                  }
               }
                     Change = true;
                  }
               }
@@ -843,7 +933,12 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
               OldEnd = LEnd;
            }
            else
               OldEnd = LEnd;
            }
            else
-              Start++;
+            {
+              ++Start;
+              // We only worry about critical deps.
+              if (Start.IsCritical() != true)
+                  continue;
+            }
 
            // Dep is ok
            if ((Cache[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall)
 
            // Dep is ok
            if ((Cache[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall)
@@ -853,15 +948,14 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
            }
            
            if (Debug == true)
            }
            
            if (Debug == true)
-              clog << "Package " << I.Name() << " has broken dep on " << Start.TargetPkg().Name() << endl;
+              clog << "Broken " << Start << endl;
 
            /* Look across the version list. If there are no possible
               targets then we keep the package and bail. This is necessary
               if a package has a dep on another package that cant be found */
            SPtrArray<pkgCache::Version *> VList = Start.AllTargets();
            if (*VList == 0 && (Flags[I->ID] & Protected) != Protected &&
 
            /* Look across the version list. If there are no possible
               targets then we keep the package and bail. This is necessary
               if a package has a dep on another package that cant be found */
            SPtrArray<pkgCache::Version *> VList = Start.AllTargets();
            if (*VList == 0 && (Flags[I->ID] & Protected) != Protected &&
-               Start->Type != pkgCache::Dep::Conflicts &&
-               Start->Type != pkgCache::Dep::Obsoletes &&
+               Start.IsNegative() == false &&
                Cache[I].NowBroken() == false)
            {          
               if (InOr == true)
                Cache[I].NowBroken() == false)
            {          
               if (InOr == true)
@@ -872,7 +966,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
               }
               
               Change = true;
               }
               
               Change = true;
-              Cache.MarkKeep(I);                 
+              Cache.MarkKeep(I, false, false);
               break;
            }
            
               break;
            }
            
@@ -882,16 +976,29 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
               pkgCache::VerIterator Ver(Cache,*V);
               pkgCache::PkgIterator Pkg = Ver.ParentPkg();
 
               pkgCache::VerIterator Ver(Cache,*V);
               pkgCache::PkgIterator Pkg = Ver.ParentPkg();
 
+               /* This is a conflicts, and the version we are looking
+                  at is not the currently selected version of the 
+                  package, which means it is not necessary to 
+                  remove/keep */
+               if (Cache[Pkg].InstallVer != Ver && Start.IsNegative() == true)
+               {
+                  if (Debug) 
+                     clog << "  Conflicts//Breaks against version " 
+                          << Ver.VerStr() << " for " << Pkg.Name() 
+                          << " but that is not InstVer, ignoring"
+                          << endl;
+                  continue;
+               }
+
               if (Debug == true)
               if (Debug == true)
-                 clog << "  Considering " << Pkg.Name() << ' ' << (int)Scores[Pkg->ID] <<
-                 " as a solution to " << I.Name() << ' ' << (int)Scores[I->ID] << endl;
+                 clog << "  Considering " << Pkg.FullName(false) << ' ' << (int)Scores[Pkg->ID] <<
+                 " as a solution to " << I.FullName(false) << ' ' << (int)Scores[I->ID] << endl;
 
               /* Try to fix the package under consideration rather than
                  fiddle with the VList package */
               if (Scores[I->ID] <= Scores[Pkg->ID] ||
                   ((Cache[Start] & pkgDepCache::DepNow) == 0 &&
 
               /* Try to fix the package under consideration rather than
                  fiddle with the VList package */
               if (Scores[I->ID] <= Scores[Pkg->ID] ||
                   ((Cache[Start] & pkgDepCache::DepNow) == 0 &&
-                   End->Type != pkgCache::Dep::Conflicts &&
-                   End->Type != pkgCache::Dep::Obsoletes))
+                   End.IsNegative() == false))
               {
                  // Try a little harder to fix protected packages..
                  if ((Flags[I->ID] & Protected) == Protected)
               {
                  // Try a little harder to fix protected packages..
                  if ((Flags[I->ID] & Protected) == Protected)
@@ -909,7 +1016,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                  /* See if a keep will do, unless the package is protected,
                     then installing it will be necessary */
                  bool Installed = Cache[I].Install();
                  /* See if a keep will do, unless the package is protected,
                     then installing it will be necessary */
                  bool Installed = Cache[I].Install();
-                 Cache.MarkKeep(I);
+                 Cache.MarkKeep(I, false, false);
                  if (Cache[I].InstBroken() == false)
                  {
                     // Unwind operation will be keep now
                  if (Cache[I].InstBroken() == false)
                  {
                     // Unwind operation will be keep now
@@ -918,27 +1025,43 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                     
                     // Restore
                     if (InOr == true && Installed == true)
                     
                     // Restore
                     if (InOr == true && Installed == true)
-                       Cache.MarkInstall(I,false);
+                       Cache.MarkInstall(I, false, 0, false);
                     
                     if (Debug == true)
                     
                     if (Debug == true)
-                       clog << "  Holding Back " << I.Name() << " rather than change " << Start.TargetPkg().Name() << endl;
+                       clog << "  Holding Back " << I.FullName(false) << " rather than change " << Start.TargetPkg().FullName(false) << endl;
                  }               
                  else
                  {                  
                     if (BrokenFix == false || DoUpgrade(I) == false)
                     {
                        // Consider other options
                  }               
                  else
                  {                  
                     if (BrokenFix == false || DoUpgrade(I) == false)
                     {
                        // Consider other options
-                       if (InOr == false)
+                       if (InOr == false || Cache[I].Garbage == true)
                        {
                           if (Debug == true)
                        {
                           if (Debug == true)
-                             clog << "  Removing " << I.Name() << " rather than change " << Start.TargetPkg().Name() << endl;
+                             clog << "  Removing " << I.FullName(false) << " rather than change " << Start.TargetPkg().FullName(false) << endl;
                           Cache.MarkDelete(I);
                           Cache.MarkDelete(I);
-                          if (Counter > 1)
-                          {
-                             if (Scores[Pkg->ID] > Scores[I->ID])
-                                Scores[I->ID] = Scores[Pkg->ID];
-                          }                       
-                       }                       
+                          if (Counter > 1 && Scores[Pkg->ID] > Scores[I->ID])
+                             Scores[I->ID] = Scores[Pkg->ID];
+                       }
+                       else if (TryFixByInstall == true &&
+                                Start.TargetPkg()->CurrentVer == 0 &&
+                                Cache[Start.TargetPkg()].Delete() == false &&
+                                (Flags[Start.TargetPkg()->ID] & ToRemove) != ToRemove &&
+                                Cache.GetCandidateVer(Start.TargetPkg()).end() == false)
+                       {
+                          /* Before removing or keeping the package with the broken dependency
+                             try instead to install the first not previously installed package
+                             solving this dependency. This helps every time a previous solver
+                             is removed by the resolver because of a conflict or alike but it is
+                             dangerous as it could trigger new breaks/conflicts… */
+                          if (Debug == true)
+                             clog << "  Try Installing " << Start.TargetPkg() << " before changing " << I.FullName(false) << std::endl;
+                          unsigned long const OldBroken = Cache.BrokenCount();
+                          Cache.MarkInstall(Start.TargetPkg(), true, 1, false);
+                          // FIXME: we should undo the complete MarkInstall process here
+                          if (Cache[Start.TargetPkg()].InstBroken() == true || Cache.BrokenCount() > OldBroken)
+                             Cache.MarkDelete(Start.TargetPkg(), false, 1, false);
+                       }
                     }
                  }
                                  
                     }
                  }
                                  
@@ -948,21 +1071,28 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
               }
               else
               {
               }
               else
               {
-                 /* This is a conflicts, and the version we are looking
-                    at is not the currently selected version of the 
-                    package, which means it is not necessary to 
-                    remove/keep */
-                 if (Cache[Pkg].InstallVer != Ver &&
-                     (Start->Type == pkgCache::Dep::Conflicts ||
-                      Start->Type == pkgCache::Dep::Obsoletes))
-                    continue;
-                 
+                 if (Start->Type == pkgCache::Dep::DpkgBreaks)
+                 {
+                    // first, try upgradring the package, if that
+                    // does not help, the breaks goes onto the
+                    // kill list
+                     //
+                    // FIXME: use DoUpgrade(Pkg) instead?
+                    if (Cache[End] & pkgDepCache::DepGCVer)
+                    {
+                       if (Debug)
+                          clog << "  Upgrading " << Pkg.FullName(false) << " due to Breaks field in " << I.FullName(false) << endl;
+                       Cache.MarkInstall(Pkg, false, 0, false);
+                       continue;
+                    }
+                 }
+
                  // Skip adding to the kill list if it is protected
                  if ((Flags[Pkg->ID] & Protected) != 0)
                     continue;
                
                  if (Debug == true)
                  // Skip adding to the kill list if it is protected
                  if ((Flags[Pkg->ID] & Protected) != 0)
                     continue;
                
                  if (Debug == true)
-                    clog << "  Added " << Pkg.Name() << " to the remove list" << endl;
+                    clog << "  Added " << Pkg.FullName(false) << " to the remove list" << endl;
                  
                  LEnd->Pkg = Pkg;
                  LEnd->Dep = End;
                  
                  LEnd->Pkg = Pkg;
                  LEnd->Dep = End;
@@ -975,9 +1105,8 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
            }
 
            // Hm, nothing can possibly satisify this dep. Nuke it.
            }
 
            // Hm, nothing can possibly satisify this dep. Nuke it.
-           if (VList[0] == 0 && 
-               Start->Type != pkgCache::Dep::Conflicts &&
-               Start->Type != pkgCache::Dep::Obsoletes &&
+           if (VList[0] == 0 &&
+               Start.IsNegative() == false &&
                (Flags[I->ID] & Protected) != Protected)
            {
               bool Installed = Cache[I].Install();
                (Flags[I->ID] & Protected) != Protected)
            {
               bool Installed = Cache[I].Install();
@@ -990,15 +1119,15 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                  
                  // Restore
                  if (InOr == true && Installed == true)
                  
                  // Restore
                  if (InOr == true && Installed == true)
-                    Cache.MarkInstall(I,false);
+                    Cache.MarkInstall(I, false, 0, false);
                  
                  if (Debug == true)
                  
                  if (Debug == true)
-                    clog << "  Holding Back " << I.Name() << " because I can't find " << Start.TargetPkg().Name() << endl;
+                    clog << "  Holding Back " << I.FullName(false) << " because I can't find " << Start.TargetPkg().FullName(false) << endl;
               }               
               else
               {
                  if (Debug == true)
               }               
               else
               {
                  if (Debug == true)
-                    clog << "  Removing " << I.Name() << " because I can't find " << Start.TargetPkg().Name() << endl;
+                    clog << "  Removing " << I.FullName(false) << " because I can't find " << Start.TargetPkg().FullName(false) << endl;
                  if (InOr == false)
                     Cache.MarkDelete(I);
               }
                  if (InOr == false)
                     Cache.MarkDelete(I);
               }
@@ -1023,19 +1152,18 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
               Change = true;
               if ((Cache[J->Dep] & pkgDepCache::DepGNow) == 0)
               {
               Change = true;
               if ((Cache[J->Dep] & pkgDepCache::DepGNow) == 0)
               {
-                 if (J->Dep->Type == pkgCache::Dep::Conflicts || 
-                     J->Dep->Type == pkgCache::Dep::Obsoletes)
+                 if (J->Dep.IsNegative() == true)
                  {
                     if (Debug == true)
                  {
                     if (Debug == true)
-                       clog << "  Fixing " << I.Name() << " via remove of " << J->Pkg.Name() << endl;
+                       clog << "  Fixing " << I.FullName(false) << " via remove of " << J->Pkg.FullName(false) << endl;
                     Cache.MarkDelete(J->Pkg);
                  }
               }
               else
               {
                  if (Debug == true)
                     Cache.MarkDelete(J->Pkg);
                  }
               }
               else
               {
                  if (Debug == true)
-                    clog << "  Fixing " << I.Name() << " via keep of " << J->Pkg.Name() << endl;
-                 Cache.MarkKeep(J->Pkg);
+                    clog << "  Fixing " << I.FullName(false) << " via keep of " << J->Pkg.FullName(false) << endl;
+                 Cache.MarkKeep(J->Pkg, false, false);
               }
 
               if (Counter > 1)
               }
 
               if (Counter > 1)
@@ -1055,7 +1183,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
    {
       // See if this is the result of a hold
       pkgCache::PkgIterator I = Cache.PkgBegin();
    {
       // See if this is the result of a hold
       pkgCache::PkgIterator I = Cache.PkgBegin();
-      for (;I.end() != true; I++)
+      for (;I.end() != true; ++I)
       {
         if (Cache[I].InstBroken() == false)
            continue;
       {
         if (Cache[I].InstBroken() == false)
            continue;
@@ -1065,13 +1193,12 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
       return _error->Error(_("Unable to correct problems, you have held broken packages."));
    }
    
       return _error->Error(_("Unable to correct problems, you have held broken packages."));
    }
    
-   // set the auto-flags (mvo: I'm not sure if we _really_ need this, but
-   // I didn't managed 
+   // set the auto-flags (mvo: I'm not sure if we _really_ need this)
    pkgCache::PkgIterator I = Cache.PkgBegin();
    pkgCache::PkgIterator I = Cache.PkgBegin();
-   for (;I.end() != true; I++) {
+   for (;I.end() != true; ++I) {
       if (Cache[I].NewInstall() && !(Flags[I->ID] & PreInstalled)) {
         if(_config->FindI("Debug::pkgAutoRemove",false)) {
       if (Cache[I].NewInstall() && !(Flags[I->ID] & PreInstalled)) {
         if(_config->FindI("Debug::pkgAutoRemove",false)) {
-           std::clog << "Resolve installed new pkg: " << I.Name() 
+           std::clog << "Resolve installed new pkg: " << I.FullName(false) 
                      << " (now marking it as auto)" << std::endl;
         }
         Cache[I].Flags |= pkgCache::Flag::Auto;
                      << " (now marking it as auto)" << std::endl;
         }
         Cache[I].Flags |= pkgCache::Flag::Auto;
@@ -1082,6 +1209,37 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/
+// ProblemResolver::BreaksInstOrPolicy - Check if the given pkg is broken/*{{{*/
+// ---------------------------------------------------------------------
+/* This checks if the given package is broken either by a hard dependency
+   (InstBroken()) or by introducing a new policy breakage e.g. new
+   unsatisfied recommends for a package that was in "policy-good" state
+
+   Note that this is not perfect as it will ignore further breakage
+   for already broken policy (recommends)
+*/
+bool pkgProblemResolver::InstOrNewPolicyBroken(pkgCache::PkgIterator I)
+{
+   // a broken install is always a problem
+   if (Cache[I].InstBroken() == true)
+   {
+      if (Debug == true)
+        std::clog << "  Dependencies are not satisfied for " << I << std::endl;
+      return true;
+   }
+
+   // a newly broken policy (recommends/suggests) is a problem
+   if (Cache[I].NowPolicyBroken() == false &&
+       Cache[I].InstPolicyBroken() == true)
+   {
+      if (Debug == true)
+        std::clog << "  Policy breaks with upgrade of " << I << std::endl;
+      return true;
+   }
+
+   return false;
+}
+                                                                       /*}}}*/
 // ProblemResolver::ResolveByKeep - Resolve problems using keep                /*{{{*/
 // ---------------------------------------------------------------------
 /* This is the work horse of the soft upgrade routine. It is very gental 
 // ProblemResolver::ResolveByKeep - Resolve problems using keep                /*{{{*/
 // ---------------------------------------------------------------------
 /* This is the work horse of the soft upgrade routine. It is very gental 
@@ -1089,11 +1247,25 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
    system was non-broken previously. */
 bool pkgProblemResolver::ResolveByKeep()
 {
    system was non-broken previously. */
 bool pkgProblemResolver::ResolveByKeep()
 {
+   std::string const solver = _config->Find("APT::Solver", "internal");
+   if (solver != "internal") {
+      OpTextProgress Prog(*_config);
+      return EDSP::ResolveExternal(solver.c_str(), Cache, true, false, false, &Prog);
+   }
+   return ResolveByKeepInternal();
+}
+                                                                       /*}}}*/
+// ProblemResolver::ResolveByKeepInternal - Resolve problems using keep        /*{{{*/
+// ---------------------------------------------------------------------
+/* This is the work horse of the soft upgrade routine. It is very gental
+   in that it does not install or remove any packages. It is assumed that the
+   system was non-broken previously. */
+bool pkgProblemResolver::ResolveByKeepInternal()
+{
+   pkgDepCache::ActionGroup group(Cache);
+
    unsigned long Size = Cache.Head().PackageCount;
 
    unsigned long Size = Cache.Head().PackageCount;
 
-   if (Debug == true)      
-      clog << "Entering ResolveByKeep" << endl;
-   
    MakeScores();
    
    /* We have to order the packages so that the broken fixing pass 
    MakeScores();
    
    /* We have to order the packages so that the broken fixing pass 
@@ -1102,28 +1274,45 @@ bool pkgProblemResolver::ResolveByKeep()
       would cause the removal of even lower score packages. */
    pkgCache::Package **PList = new pkgCache::Package *[Size];
    pkgCache::Package **PEnd = PList;
       would cause the removal of even lower score packages. */
    pkgCache::Package **PList = new pkgCache::Package *[Size];
    pkgCache::Package **PEnd = PList;
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
       *PEnd++ = I;
    This = this;
    qsort(PList,PEnd - PList,sizeof(*PList),&ScoreSort);
       *PEnd++ = I;
    This = this;
    qsort(PList,PEnd - PList,sizeof(*PList),&ScoreSort);
-   
+
+   if (_config->FindB("Debug::pkgProblemResolver::ShowScores",false) == true)
+   {
+      clog << "Show Scores" << endl;
+      for (pkgCache::Package **K = PList; K != PEnd; K++)
+         if (Scores[(*K)->ID] != 0)
+         {
+           pkgCache::PkgIterator Pkg(Cache,*K);
+           clog << Scores[(*K)->ID] << ' ' << Pkg << std::endl;
+         }
+   }
+
+   if (Debug == true)
+      clog << "Entering ResolveByKeep" << endl;
+
    // Consider each broken package 
    pkgCache::Package **LastStop = 0;
    for (pkgCache::Package **K = PList; K != PEnd; K++)
    {
       pkgCache::PkgIterator I(Cache,*K);
 
    // Consider each broken package 
    pkgCache::Package **LastStop = 0;
    for (pkgCache::Package **K = PList; K != PEnd; K++)
    {
       pkgCache::PkgIterator I(Cache,*K);
 
-      if (Cache[I].InstallVer == 0 || Cache[I].InstBroken() == false)
+      if (Cache[I].InstallVer == 0)
         continue;
 
         continue;
 
+      if (InstOrNewPolicyBroken(I) == false)
+         continue;
+
       /* Keep the package. If this works then great, otherwise we have
                 to be significantly more agressive and manipulate its dependencies */
       if ((Flags[I->ID] & Protected) == 0)
       {
         if (Debug == true)
       /* Keep the package. If this works then great, otherwise we have
                 to be significantly more agressive and manipulate its dependencies */
       if ((Flags[I->ID] & Protected) == 0)
       {
         if (Debug == true)
-           clog << "Keeping package " << I.Name() << endl;
-        Cache.MarkKeep(I);
-        if (Cache[I].InstBroken() == false)
+           clog << "Keeping package " << I.FullName(false) << endl;
+        Cache.MarkKeep(I, false, false);
+        if (InstOrNewPolicyBroken(I) == false)
         {
            K = PList - 1;
            continue;
         {
            K = PList - 1;
            continue;
@@ -1152,8 +1341,8 @@ bool pkgProblemResolver::ResolveByKeep()
         while (true)
         {
            if (Debug == true)
         while (true)
         {
            if (Debug == true)
-              clog << "Package " << I.Name() << " has broken dep on " << Start.TargetPkg().Name() << endl;
-           
+              clog << "Package " << I.FullName(false) << " " << Start << endl;
+
            // Look at all the possible provides on this package
            SPtrArray<pkgCache::Version *> VList = Start.AllTargets();
            for (pkgCache::Version **V = VList; *V != 0; V++)
            // Look at all the possible provides on this package
            SPtrArray<pkgCache::Version *> VList = Start.AllTargets();
            for (pkgCache::Version **V = VList; *V != 0; V++)
@@ -1169,32 +1358,32 @@ bool pkgProblemResolver::ResolveByKeep()
               if ((Flags[I->ID] & Protected) == 0)
               {
                  if (Debug == true)
               if ((Flags[I->ID] & Protected) == 0)
               {
                  if (Debug == true)
-                    clog << "  Keeping Package " << Pkg.Name() << " due to dep" << endl;
-                 Cache.MarkKeep(Pkg);
+                    clog << "  Keeping Package " << Pkg.FullName(false) << " due to " << Start.DepType() << endl;
+                 Cache.MarkKeep(Pkg, false, false);
               }
               
               }
               
-              if (Cache[I].InstBroken() == false)
+              if (InstOrNewPolicyBroken(I) == false)
                  break;
            }
            
                  break;
            }
            
-           if (Cache[I].InstBroken() == false)
+           if (InstOrNewPolicyBroken(I) == false)
               break;
 
            if (Start == End)
               break;
               break;
 
            if (Start == End)
               break;
-           Start++;
+           ++Start;
         }
              
         }
              
-        if (Cache[I].InstBroken() == false)
+        if (InstOrNewPolicyBroken(I) == false)
            break;
       }
 
            break;
       }
 
-      if (Cache[I].InstBroken() == true)
+      if (InstOrNewPolicyBroken(I) == true)
         continue;
       
       // Restart again.
       if (K == LastStop)
         continue;
       
       // Restart again.
       if (K == LastStop)
-        return _error->Error("Internal Error, pkgProblemResolver::ResolveByKeep is looping on package %s.",I.Name());
+        return _error->Error("Internal Error, pkgProblemResolver::ResolveByKeep is looping on package %s.",I.FullName(false).c_str());
       LastStop = K;
       K = PList - 1;
    }   
       LastStop = K;
       K = PList - 1;
    }   
@@ -1207,19 +1396,25 @@ bool pkgProblemResolver::ResolveByKeep()
 /* This is used to make sure protected packages are installed */
 void pkgProblemResolver::InstallProtect()
 {
 /* This is used to make sure protected packages are installed */
 void pkgProblemResolver::InstallProtect()
 {
-   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   pkgDepCache::ActionGroup group(Cache);
+
+   for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if ((Flags[I->ID] & Protected) == Protected)
       {
         if ((Flags[I->ID] & ToRemove) == ToRemove)
            Cache.MarkDelete(I);
    {
       if ((Flags[I->ID] & Protected) == Protected)
       {
         if ((Flags[I->ID] & ToRemove) == ToRemove)
            Cache.MarkDelete(I);
-        else
-           Cache.MarkInstall(I,false);
+        else 
+        {
+           // preserve the information whether the package was auto
+           // or manually installed
+           bool autoInst = (Cache[I].Flags & pkgCache::Flag::Auto);
+           Cache.MarkInstall(I, false, 0, !autoInst);
+        }
       }
    }   
 }
                                                                        /*}}}*/
       }
    }   
 }
                                                                        /*}}}*/
-
 // PrioSortList - Sort a list of versions by priority                  /*{{{*/
 // ---------------------------------------------------------------------
 /* This is ment to be used in conjunction with AllTargets to get a list 
 // PrioSortList - Sort a list of versions by priority                  /*{{{*/
 // ---------------------------------------------------------------------
 /* This is ment to be used in conjunction with AllTargets to get a list 
@@ -1250,248 +1445,87 @@ void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List)
    qsort(List,Count,sizeof(*List),PrioComp);
 }
                                                                        /*}}}*/
    qsort(List,Count,sizeof(*List),PrioComp);
 }
                                                                        /*}}}*/
-
-
-// mark a single package in Mark-and-Sweep
-void pkgMarkPackage(pkgDepCache &Cache,
-                   const pkgCache::PkgIterator &pkg,
-                   const pkgCache::VerIterator &ver,
-                   bool follow_recommends,
-                   bool follow_suggests)
-{
-   pkgDepCache::StateCache &state=Cache[pkg];
-   pkgCache::VerIterator candver=state.CandidateVerIter(Cache);
-   pkgCache::VerIterator instver=state.InstVerIter(Cache);
-
-#if 0
-   // If a package was garbage-collected but is now being marked, we
-   // should re-select it 
-   // For cases when a pkg is set to upgrade and this trigger the
-   // removal of a no-longer used dependency.  if the pkg is set to
-   // keep again later it will result in broken deps
-   if(state.Delete() && state.RemoveReason=pkgDepCache::Unused) 
-   {
-      if(ver==candver)
-        mark_install(pkg, false, false, NULL);
-      else if(ver==pkg.CurrentVer())
-        MarkKeep(pkg);
-      
-      instver=state.InstVerIter(*this);
-   }
-#endif
-
-   // Ignore versions other than the InstVer, and ignore packages
-   // that are already going to be removed or just left uninstalled.
-   if(!(ver==instver && !instver.end()))
-      return;
-
-   // if we are marked already we are done
-   if(state.Marked)
-      return;
-
-   //std::cout << "Setting Marked for: " << pkg.Name() << std::endl;
-   state.Marked=true;
-
-   if(!ver.end())
-   {
-     for(pkgCache::DepIterator d=ver.DependsList(); !d.end(); ++d)
-     {
-       if(d->Type==pkgCache::Dep::Depends ||
-          d->Type==pkgCache::Dep::PreDepends ||
-          (follow_recommends &&
-           d->Type==pkgCache::Dep::Recommends) ||
-          (follow_suggests &&
-           d->Type==pkgCache::Dep::Suggests))
-        {
-          // Try all versions of this package.
-          for(pkgCache::VerIterator V=d.TargetPkg().VersionList(); 
-              !V.end(); ++V)
-          {
-             if(_system->VS->CheckDep(V.VerStr(),d->CompareOp, d.TargetVer()))
-             {
-                pkgMarkPackage(Cache, V.ParentPkg(), V, 
-                               follow_recommends, follow_suggests);
-             }
-          }
-          // Now try virtual packages
-          for(pkgCache::PrvIterator prv=d.TargetPkg().ProvidesList(); 
-              !prv.end(); ++prv)
-          {
-             if(_system->VS->CheckDep(prv.ProvideVersion(), d->CompareOp, 
-                                      d.TargetVer()))
-             {
-                pkgMarkPackage(Cache, prv.OwnerPkg(), prv.OwnerVer(),
-                               follow_recommends, follow_suggests);
-             }
-          }
-       }
-     }
-   }
-}
-
-
-// Helper for APT::NeverAutoRemove, always include the packages matching
-// this regexp into the root-set
-inline bool 
-pkgMarkAlwaysInclude(pkgCache::PkgIterator p, vector<regex_t*> alwaysMark)
+// ListUpdate - update the cache files                                 /*{{{*/
+// ---------------------------------------------------------------------
+/* This is a simple wrapper to update the cache. it will fetch stuff
+ * from the network (or any other sources defined in sources.list)
+ */
+bool ListUpdate(pkgAcquireStatus &Stat, 
+               pkgSourceList &List, 
+               int PulseInterval)
 {
 {
-   for(unsigned int i=0;i<alwaysMark.size();i++)
-      if (regexec(alwaysMark[i],p.Name(),0,0,0) == 0)
-        return true;
+   pkgAcquire::RunResult res;
+   pkgAcquire Fetcher;
+   if (Fetcher.Setup(&Stat, _config->FindDir("Dir::State::Lists")) == false)
+      return false;
 
 
-   return false;
-}
+   // Populate it with the source selection
+   if (List.GetIndexes(&Fetcher) == false)
+        return false;
 
 
-bool pkgMarkUsed(pkgDepCache &Cache)
-{
-   InRootSetFunc f;
-   return pkgMarkUsed(Cache, f);
-}
+   // Run scripts
+   RunScripts("APT::Update::Pre-Invoke");
+   
+   // check arguments
+   if(PulseInterval>0)
+      res = Fetcher.Run(PulseInterval);
+   else
+      res = Fetcher.Run();
 
 
-// the main mark algorithm
-bool pkgMarkUsed(pkgDepCache &Cache, InRootSetFunc &userFunc)
-{
-   bool follow_recommends;
-   bool follow_suggests;
+   if (res == pkgAcquire::Failed)
+      return false;
 
 
-   // init the states
-   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
+   bool Failed = false;
+   bool TransientNetworkFailure = false;
+   for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); 
+       I != Fetcher.ItemsEnd(); ++I)
    {
    {
-      Cache[p].Marked=false;
-      Cache[p].Garbage=false;
-
-      // debug output
-      if(_config->FindB("Debug::pkgAutoRemove",false) 
-        && Cache[p].Flags & pkgCache::Flag::Auto)
-        std::clog << "AutoDep: " << p.Name() << std::endl;
-   }
+      if ((*I)->Status == pkgAcquire::Item::StatDone)
+        continue;
 
 
-   // init vars
-   follow_recommends=_config->FindB("APT::AutoRemove::RecommendsImportant",false);
-   follow_suggests=_config->FindB("APT::AutoRemove::SuggestsImportant", false);
+      (*I)->Finished();
 
 
+      ::URI uri((*I)->DescURI());
+      uri.User.clear();
+      uri.Password.clear();
+      string descUri = string(uri);
+      _error->Warning(_("Failed to fetch %s  %s\n"), descUri.c_str(),
+             (*I)->ErrorText.c_str());
 
 
-   // init the "NeverAutoRemove" variable
-   vector<regex_t *> neverAutoRemoveRegexp;
-   Configuration::Item const *Opts;
-   Opts = _config->Tree("APT::NeverAutoRemove");
-   if (Opts != 0 && Opts->Child != 0)
-   {
-      Opts = Opts->Child;
-      for (; Opts != 0; Opts = Opts->Next)
+      if ((*I)->Status == pkgAcquire::Item::StatTransientNetworkError) 
       {
       {
-        if (Opts->Value.empty() == true)
-           continue;
-
-        regex_t *p = new regex_t;
-        if(regcomp(p,Opts->Value.c_str(),
-                   REG_EXTENDED | REG_ICASE |  REG_NOSUB) != 0)
-        {
-           regfree(p);
-           for(unsigned int i=0;i<neverAutoRemoveRegexp.size();i++)
-              regfree(neverAutoRemoveRegexp[i]);
-           return _error->Error("Regex compilation error for APT::NeverAutoRemove");
-        }
-        neverAutoRemoveRegexp.push_back(p);
+        TransientNetworkFailure = true;
+        continue;
       }
       }
-   }
-
 
 
-   // do the mark part, this is the core bit of the algorithm
-   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
+      Failed = true;
+   }
+   
+   // Clean out any old list files
+   // Keep "APT::Get::List-Cleanup" name for compatibility, but
+   // this is really a global option for the APT library now
+   if (!TransientNetworkFailure && !Failed &&
+       (_config->FindB("APT::Get::List-Cleanup",true) == true &&
+       _config->FindB("APT::List-Cleanup",true) == true))
    {
    {
-      if( userFunc.InRootSet(p) ||
-          pkgMarkAlwaysInclude(p, neverAutoRemoveRegexp) ||
-        !(Cache[p].Flags & pkgCache::Flag::Auto) ||
-         (p->Flags & pkgCache::Flag::Essential))
-          
-      {
-        // the package is installed (and set to keep)
-        if(Cache[p].Keep() && !p.CurrentVer().end())
-           pkgMarkPackage(Cache, p, p.CurrentVer(),
-                          follow_recommends, follow_suggests);
-        // the package is to be installed 
-        else if(Cache[p].Install())
-           pkgMarkPackage(Cache, p, Cache[p].InstVerIter(Cache),
-                          follow_recommends, follow_suggests);
-      }
+      if (Fetcher.Clean(_config->FindDir("Dir::State::lists")) == false ||
+         Fetcher.Clean(_config->FindDir("Dir::State::lists") + "partial/") == false)
+        // something went wrong with the clean
+        return false;
    }
    }
+   
+   if (TransientNetworkFailure == true)
+      _error->Warning(_("Some index files failed to download. They have been ignored, or old ones used instead."));
+   else if (Failed == true)
+      return _error->Error(_("Some index files failed to download. They have been ignored, or old ones used instead."));
 
 
 
 
-   // do the sweep
-   for(pkgCache::PkgIterator p=Cache.PkgBegin(); !p.end(); ++p)
-  {
-     pkgDepCache::StateCache &state=Cache[p];
-
-     // if it is not marked and it is installed, it's garbage 
-     if(!state.Marked && !p.CurrentVer().end())
-     {
-       state.Garbage=true;
-       if(_config->FindB("Debug::pkgAutoRemove",false))
-          std::cout << "Garbage: " << p.Name() << std::endl;
-     
-#if 0   // mvo: the below bits still needs to be ported
-
-       // Be sure not to re-delete already deleted packages.
-       if(delete_unused && (!p.CurrentVer().end() || state.Install()) &&
-          !state.Delete())
-       {
-             bool do_delete=true;
-
-             // If the package is being upgraded, check if we're
-             // losing a versioned dep.  If the dependency matches
-             // the previous version and not the new version, keep
-             // the package back instead of removing it.
-             if(!p.CurrentVer().end() && state.Install())
-               {
-                 const char *vs=p.CurrentVer().VerStr();
-
-                 // Check direct revdeps only.  THIS ASSUMES NO
-                 // VERSIONED PROVIDES, but Debian probably won't
-                 // have them for ages if ever.
-                 for(pkgCache::DepIterator revdep=p.RevDependsList();
-                     !revdep.end(); ++revdep)
-                   {
-                     pkgCache::PkgIterator depender=revdep.ParentPkg();
-                     // Find which version of the depending package
-                     // will be installed.
-                     pkgCache::VerIterator instver=(*this)[depender].InstVerIter(*this);
-
-                     // Only pay attention to strong positive
-                     // dependencies whose parents will be installed.
-                     if(revdep.ParentVer()==instver &&
-                        (revdep->Type==pkgCache::Dep::Depends ||
-                         revdep->Type==pkgCache::Dep::PreDepends ||
-                         (revdep->Type==pkgCache::Dep::Recommends &&
-                          follow_recommends)))
-                       {
-                         // If the previous version matched, cancel the
-                         // deletion.  (note that I assume that the new
-                         // version does NOT match; otherwise it would
-                         // not be unused!)
-                         if(_system->VS->CheckDep(vs,
-                                                  revdep->CompareOp,
-                                                  revdep.TargetVer()))
-                           {
-                             mark_keep(p, false, false, undo);
-                             do_delete=false;
-                             break;
-                           }
-                       }
-                   }
-               }
-
-             if(do_delete)
-               mark_delete(p, false, true, undo);
-           }
-#endif
-     }
-  }
-
-   // cleanup
-   for(unsigned int i=0;i<neverAutoRemoveRegexp.size();i++)
-      regfree(neverAutoRemoveRegexp[i]);
-   
+   // Run the success scripts if all was fine
+   if(!TransientNetworkFailure && !Failed)
+      RunScripts("APT::Update::Post-Invoke-Success");
 
 
+   // Run the other scripts
+   RunScripts("APT::Update::Post-Invoke");
    return true;
 }
    return true;
 }
+                                                                       /*}}}*/
APT (for Cydia)