* apt-pkg/algorithms.cc:

[apt.git] / apt-pkg / algorithms.cc

diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index c28317b720d63f0e5339f1adec1fe0b7fef48c2a..e1b9406e2341f9d85d98793b055ecf055ab6363d 100644 (file)
--- a/apt-pkg/algorithms.cc
+++ b/apt-pkg/algorithms.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: algorithms.cc,v 1.39 2002/04/02 05:55:24 jgg Exp $
+// $Id: algorithms.cc,v 1.44 2002/11/28 18:49:16 jgg Exp $
 /* ######################################################################
 
    Algorithms - A set of misc algorithms
@@ -26,6 +26,7 @@
     
 #include <iostream>
                                                                        /*}}}*/
+using namespace std;
 
 pkgProblemResolver *pkgProblemResolver::This = 0;
 
@@ -49,21 +50,29 @@ pkgSimulate::pkgSimulate(pkgDepCache *Cache) : pkgPackageManager(Cache),
                                                                        /*}}}*/
 // Simulate::Describe - Describe a package                             /*{{{*/
 // ---------------------------------------------------------------------
-/* */
-void pkgSimulate::Describe(PkgIterator Pkg,ostream &out,bool Now)
+/* Parameter Current == true displays the current package version,
+   Parameter Candidate == true displays the candidate package version */
+void pkgSimulate::Describe(PkgIterator Pkg,ostream &out,bool Current,bool Candidate)
 {
    VerIterator Ver(Sim);
-   if (Now == true)
+ 
+   out << Pkg.Name();
+
+   if (Current == true)
+   {
       Ver = Pkg.CurrentVer();
-   else
-      Ver = Sim[Pkg].CandidateVerIter(Sim);
+      if (Ver.end() == false)
+         out << " [" << Ver.VerStr() << ']';
+   }
 
-   out << Pkg.Name();
-   
-   if (Ver.end() == true)
-      return;
+   if (Candidate == true)
+   {
+      Ver = Sim[Pkg].CandidateVerIter(Sim);
+      if (Ver.end() == true)
+         return;
    
-   out << " (" << Ver.VerStr() << ' ' << Ver.RelStr() << ')';
+      out << " (" << Ver.VerStr() << ' ' << Ver.RelStr() << ')';
+   }
 }
                                                                        /*}}}*/
 // Simulate::Install - Simulate unpacking of a package                 /*{{{*/
@@ -76,7 +85,7 @@ bool pkgSimulate::Install(PkgIterator iPkg,string /*File*/)
    Flags[Pkg->ID] = 1;
    
    cout << "Inst ";
-   Describe(Pkg,cout,false);
+   Describe(Pkg,cout,true,true);
    Sim.MarkInstall(Pkg,false);
    
    // Look for broken conflicts+predepends.
@@ -150,7 +159,7 @@ bool pkgSimulate::Configure(PkgIterator iPkg)
    else
    {
       cout << "Conf "; 
-      Describe(Pkg,cout,false);
+      Describe(Pkg,cout,false,true);
    }
 
    if (Sim.BrokenCount() != 0)
@@ -175,7 +184,7 @@ bool pkgSimulate::Remove(PkgIterator iPkg,bool Purge)
       cout << "Purg ";
    else
       cout << "Remv ";
-   Describe(Pkg,cout,false);
+   Describe(Pkg,cout,true,false);
 
    if (Sim.BrokenCount() != 0)
       ShortBreaks();
@@ -485,8 +494,10 @@ void pkgProblemResolver::MakeScores()
         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)
+         on the same level. We enhance the score of installed packages 
+        if those are not obsolete
+      */
+      if (I->CurrentVer != 0 && Cache[I].CandidateVerIter(Cache).Downloadable())
         Score += 1;
    }
 
@@ -558,6 +569,8 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg)
 {
    if ((Flags[Pkg->ID] & Upgradable) == 0 || Cache[Pkg].Upgradable() == false)
       return false;
+   if ((Flags[Pkg->ID] & Protected) == Protected)
+      return false;
    
    Flags[Pkg->ID] &= ~Upgradable;
    
@@ -773,7 +786,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
            continue;
         
         if (Debug == true)
-           cout << "Investigating " << I.Name() << endl;
+           clog << "Investigating " << I.Name() << endl;
         
         // Isolate the problem dependency
         PackageKill KillList[100];
@@ -800,6 +813,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                        if (Debug == true)
                           clog << "  Or group remove for " << I.Name() << endl;
                        Cache.MarkDelete(I);
+                       Change = true;
                     }               
                  }               
                  if (OldEnd == LEnd && OrOp == OrKeep)
@@ -807,6 +821,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                     if (Debug == true)
                        clog << "  Or group keep for " << I.Name() << endl;
                     Cache.MarkKeep(I);
+                    Change = true;
                  }
               }
               
@@ -817,21 +832,29 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
               D.GlobOr(Start,End);
               if (Start.end() == true)
                  break;
-              
+
               // We only worry about critical deps.
               if (End.IsCritical() != true)
                  continue;
-              
+
               InOr = Start != End;
               OldEnd = LEnd;
-           }       
+           }
            else
+            {
               Start++;
-           
+              // We only worry about critical deps.
+              if (Start.IsCritical() != true)
+                  continue;
+            }
+
            // Dep is ok
            if ((Cache[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall)
+           {
+              InOr = false;
               continue;
-                   
+           }
+           
            if (Debug == true)
               clog << "Package " << I.Name() << " has broken dep on " << Start.TargetPkg().Name() << endl;
 
@@ -1197,14 +1220,14 @@ static int PrioComp(const void *A,const void *B)
    pkgCache::VerIterator R(*PrioCache,*(pkgCache::Version **)B);
    
    if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential &&
-       (L.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential)
-   return 1;
+       (R.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential)
+     return 1;
    if ((L.ParentPkg()->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential &&
-       (L.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
-   return -1;
+       (R.ParentPkg()->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
+     return -1;
    
    if (L->Priority != R->Priority)
-      return L->Priority - R->Priority;
+      return R->Priority - L->Priority;
    return strcmp(L.ParentPkg().Name(),R.ParentPkg().Name());
 }
 void pkgPrioSortList(pkgCache &Cache,pkgCache::Version **List)