X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/d2685fd634b32f152748b7004c6810e946bbbcf2..2ac6ce927cda2847baf8e71a74e595e6b82c6d98:/apt-pkg/depcache.cc

diff --git a/apt-pkg/depcache.cc b/apt-pkg/depcache.cc
index 4fb26b777..366687382 100644
--- a/apt-pkg/depcache.cc
+++ b/apt-pkg/depcache.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description								/*{{{*/
-// $Id: depcache.cc,v 1.8 1998/12/06 03:41:26 jgg Exp $
+// $Id: depcache.cc,v 1.25 2001/05/27 05:36:04 jgg Exp $
 /* ######################################################################
 
    Dependency Cache - Caches Dependency information.
@@ -12,19 +12,30 @@
 #pragma implementation "apt-pkg/depcache.h"
 #endif
 #include <apt-pkg/depcache.h>
-
 #include <apt-pkg/version.h>
 #include <apt-pkg/error.h>
+#include <apt-pkg/sptr.h>
+#include <apt-pkg/algorithms.h>
+
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/tagfile.h>
+
+#include <iostream>
+#include <sstream>    
+#include <apti18n.h>    
 									/*}}}*/
 
 // DepCache::pkgDepCache - Constructors					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-pkgDepCache::pkgDepCache(MMap &Map,OpProgress &Prog) :
-             pkgCache(Map), PkgState(0), DepState(0)
+pkgDepCache::pkgDepCache(pkgCache *pCache,Policy *Plcy) :
+                Cache(pCache), PkgState(0), DepState(0)
 {
-   if (_error->PendingError() == false)
-      Init(&Prog);
+   delLocalPolicy = 0;
+   LocalPolicy = Plcy;
+   if (LocalPolicy == 0)
+      delLocalPolicy = LocalPolicy = new Policy;
 }
 									/*}}}*/
 // DepCache::~pkgDepCache - Destructor					/*{{{*/
@@ -34,6 +45,7 @@ pkgDepCache::~pkgDepCache()
 {
    delete [] PkgState;
    delete [] DepState;
+   delete delLocalPolicy;
 }
 									/*}}}*/
 // DepCache::Init - Generate the initial extra structures.		/*{{{*/
@@ -47,12 +59,12 @@ bool pkgDepCache::Init(OpProgress *Prog)
    DepState = new unsigned char[Head().DependsCount];
    memset(PkgState,0,sizeof(*PkgState)*Head().PackageCount);
    memset(DepState,0,sizeof(*DepState)*Head().DependsCount); 
-   
+
    if (Prog != 0)
    {
       Prog->OverallProgress(0,2*Head().PackageCount,Head().PackageCount,
-			    "Building Dependency Tree");
-      Prog->SubProgress(Head().PackageCount,"Candidate Versions");
+			    _("Building dependency tree"));
+      Prog->SubProgress(Head().PackageCount,_("Candidate versions"));
    }
    
    /* Set the current state of everything. In this state all of the
@@ -66,7 +78,7 @@ bool pkgDepCache::Init(OpProgress *Prog)
       // Find the proper cache slot
       StateCache &State = PkgState[I->ID];
       State.iFlags = 0;
-      
+
       // Figure out the install version
       State.CandidateVer = GetCandidateVer(I);
       State.InstallVer = I.CurrentVer();
@@ -80,49 +92,85 @@ bool pkgDepCache::Init(OpProgress *Prog)
       
       Prog->OverallProgress(Head().PackageCount,2*Head().PackageCount,
 			    Head().PackageCount,
-			    "Building Dependency Tree");
-      Prog->SubProgress(Head().PackageCount,"Dependency Generation");
+			    _("Building dependency tree"));
+      Prog->SubProgress(Head().PackageCount,_("Dependency generation"));
    }
    
    Update(Prog);
+
+   if(Prog != 0)
+      Prog->Done();
    
    return true;
 } 
 									/*}}}*/
-// DepCache::GetCandidateVer - Returns the Candidate install version	/*{{{*/
-// ---------------------------------------------------------------------
-/* The default just returns the target version if it exists or the
-   highest version. */
-pkgDepCache::VerIterator pkgDepCache::GetCandidateVer(PkgIterator Pkg)
+
+bool pkgDepCache::readStateFile(OpProgress *Prog)
 {
-   // Try to use an explicit target
-   if (Pkg->TargetVer == 0)
-   {
-      /* Not source versions cannot be a candidate version unless they
-         are already installed */
-      for (VerIterator I = Pkg.VersionList(); I.end() == false; I++)
-      {
-	 if (Pkg.CurrentVer() == I)
-	    return I;
-	 for (VerFileIterator J = I.FileList(); J.end() == false; J++)
-	    if ((J.File()->Flags & Flag::NotSource) == 0)
-		return I;
+   FileFd state_file;
+   string state = _config->FindDir("Dir::State") + "pkgstates";
+   if(FileExists(state)) {
+      state_file.Open(state, FileFd::ReadOnly);
+      int file_size = state_file.Size();
+      if(Prog != NULL)
+	 Prog->OverallProgress(0, file_size, 1, 
+			       _("Reading state information"));
+
+      pkgTagFile tagfile(&state_file);
+      pkgTagSection section;
+      int amt=0;
+      while(tagfile.Step(section)) {
+	 string pkgname = section.FindS("Package");
+	 pkgCache::PkgIterator pkg=Cache->FindPkg(pkgname);
+	 // Silently ignore unknown packages and packages with no actual
+	 // version.
+	 if(!pkg.end() && !pkg.VersionList().end()) {
+	    short reason = section.FindI("Install-Reason", 0);
+	    if(reason > 0)
+	       PkgState[pkg->ID].Flags  |= pkgCache::Flag::Auto;
+	    if(_config->FindB("Debug::pkgAutoRemove",false))
+	       std::cout << "Install-Reason for: " << pkgname 
+			 << " is " << reason << std::endl;
+	    amt+=section.size();
+	    if(Prog != NULL)
+	       Prog->OverallProgress(amt, file_size, 1, 
+				     _("Reading state information"));
+	 }
+	 if(Prog != NULL)
+	    Prog->OverallProgress(file_size, file_size, 1, 
+				  _("Reading state information"));
       }
-	 
-      return VerIterator(*this,0);
    }
-   else
-      return Pkg.TargetVer(); 
+
+   return true;
 }
-									/*}}}*/
-// DepCache::IsImportantDep - True if the dependency is important	/*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool pkgDepCache::IsImportantDep(DepIterator Dep)
+
+bool pkgDepCache::writeStateFile(OpProgress *prog)
 {
-   return Dep.IsCritical();
+   FileFd StateFile;
+   string state = _config->FindDir("Dir::State") + "pkgstates";
+
+   if(_config->FindB("Debug::pkgAutoRemove",false))
+      std::clog << "pkgDepCache::writeStateFile()" << std::endl;
+
+   if(!StateFile.Open(state, FileFd::WriteEmpty))
+      return _error->Error(_("Failed to write StateFile %s"),
+			   state.c_str());
+
+   std::ostringstream ostr;
+   for(pkgCache::PkgIterator pkg=Cache->PkgBegin(); !pkg.end();pkg++) {
+
+      if(PkgState[pkg->ID].Flags & pkgCache::Flag::Auto) {
+	 if(_config->FindB("Debug::pkgAutoRemove",false))
+	    std::clog << "AutoInstal: " << pkg.Name() << std::endl;
+	 ostr.str(string(""));
+	 ostr << "Package: " << pkg.Name() 
+	      << "\nInstall-Reason: 1\n\n";
+	 StateFile.Write(ostr.str().c_str(), ostr.str().size());
+      }
+   }
+   return true;
 }
-									/*}}}*/
 
 // DepCache::CheckDep - Checks a single dependency			/*{{{*/
 // ---------------------------------------------------------------------
@@ -137,28 +185,30 @@ bool pkgDepCache::CheckDep(DepIterator Dep,int Type,PkgIterator &Res)
    /* Check simple depends. A depends -should- never self match but 
       we allow it anyhow because dpkg does. Technically it is a packaging
       bug. Conflicts may never self match */
-   if (Dep.TargetPkg() != Dep.ParentPkg() || Dep->Type != Dep::Conflicts)
+   if (Dep.TargetPkg() != Dep.ParentPkg() || 
+       (Dep->Type != Dep::Conflicts && Dep->Type != Dep::Obsoletes))
    {
       PkgIterator Pkg = Dep.TargetPkg();
       // Check the base package
       if (Type == NowVersion && Pkg->CurrentVer != 0)
-	 if (pkgCheckDep(Dep.TargetVer(),
-			 Pkg.CurrentVer().VerStr(),Dep->CompareOp) == true)
+	 if (VS().CheckDep(Pkg.CurrentVer().VerStr(),Dep->CompareOp,
+				 Dep.TargetVer()) == true)
 	    return true;
       
       if (Type == InstallVersion && PkgState[Pkg->ID].InstallVer != 0)
-	 if (pkgCheckDep(Dep.TargetVer(),
-			 PkgState[Pkg->ID].InstVerIter(*this).VerStr(),
-			 Dep->CompareOp) == true)
+	 if (VS().CheckDep(PkgState[Pkg->ID].InstVerIter(*this).VerStr(),
+				 Dep->CompareOp,Dep.TargetVer()) == true)
 	    return true;
       
       if (Type == CandidateVersion && PkgState[Pkg->ID].CandidateVer != 0)
-	 if (pkgCheckDep(Dep.TargetVer(),
-			 PkgState[Pkg->ID].CandidateVerIter(*this).VerStr(),
-			 Dep->CompareOp) == true)
+	 if (VS().CheckDep(PkgState[Pkg->ID].CandidateVerIter(*this).VerStr(),
+				 Dep->CompareOp,Dep.TargetVer()) == true)
 	    return true;
    }
    
+   if (Dep->Type == Dep::Obsoletes)
+      return false;
+   
    // Check the providing packages
    PrvIterator P = Dep.TargetPkg().ProvidesList();
    PkgIterator Pkg = Dep.ParentPkg();
@@ -191,7 +241,7 @@ bool pkgDepCache::CheckDep(DepIterator Dep,int Type,PkgIterator &Res)
       }
       
       // Compare the versions.
-      if (pkgCheckDep(Dep.TargetVer(),P.ProvideVersion(),Dep->CompareOp) == true)
+      if (VS().CheckDep(P.ProvideVersion(),Dep->CompareOp,Dep.TargetVer()) == true)
       {
 	 Res = P.OwnerPkg();
 	 return true;
@@ -204,39 +254,48 @@ bool pkgDepCache::CheckDep(DepIterator Dep,int Type,PkgIterator &Res)
 // DepCache::AddSizes - Add the packages sizes to the counters		/*{{{*/
 // ---------------------------------------------------------------------
 /* Call with Mult = -1 to preform the inverse opration */
-void pkgDepCache::AddSizes(const PkgIterator &Pkg,long Mult)
+void pkgDepCache::AddSizes(const PkgIterator &Pkg,signed long Mult)
 {
    StateCache &P = PkgState[Pkg->ID];
    
+   if (Pkg->VersionList == 0)
+      return;
+   
+   if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && 
+       P.Keep() == true)
+      return;
+   
    // Compute the size data
    if (P.NewInstall() == true)
    {
-      iUsrSize += Mult*P.InstVerIter(*this)->InstalledSize;
-      iDownloadSize += Mult*P.InstVerIter(*this)->Size;
+      iUsrSize += (signed)(Mult*P.InstVerIter(*this)->InstalledSize);
+      iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size);
       return;
    }
    
    // Upgrading
-   if (Pkg->CurrentVer != 0 && P.InstallVer != (Version *)Pkg.CurrentVer() &&
-       P.InstallVer != 0)
+   if (Pkg->CurrentVer != 0 && 
+       (P.InstallVer != (Version *)Pkg.CurrentVer() || 
+	(P.iFlags & ReInstall) == ReInstall) && P.InstallVer != 0)
    {
-      iUsrSize += Mult*((signed)P.InstVerIter(*this)->InstalledSize - 
-			(signed)Pkg.CurrentVer()->InstalledSize);
-      iDownloadSize += Mult*P.InstVerIter(*this)->Size;
+      iUsrSize += (signed)(Mult*((signed)P.InstVerIter(*this)->InstalledSize - 
+			(signed)Pkg.CurrentVer()->InstalledSize));
+      iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size);
       return;
    }
    
    // Reinstall
-   if (Pkg.State() == pkgCache::PkgIterator::NeedsUnpack)
+   if (Pkg.State() == pkgCache::PkgIterator::NeedsUnpack &&
+       P.Delete() == false)
    {
-      iDownloadSize += Mult*P.InstVerIter(*this)->Size;
+      iDownloadSize += (signed)(Mult*P.InstVerIter(*this)->Size);
       return;
    }
    
    // Removing
    if (Pkg->CurrentVer != 0 && P.InstallVer == 0)
    {
-      iUsrSize -= Mult*Pkg.CurrentVer()->InstalledSize;
+      iUsrSize -= (signed)(Mult*Pkg.CurrentVer()->InstalledSize);
       return;
    }   
 }
@@ -264,16 +323,24 @@ void pkgDepCache::AddStates(const PkgIterator &Pkg,int Add)
    // Not installed
    if (Pkg->CurrentVer == 0)
    {
+      if (State.Mode == ModeDelete && 
+	  (State.iFlags | Purge) == Purge && Pkg.Purge() == false)
+	 iDelCount += Add;
+      
       if (State.Mode == ModeInstall)
 	 iInstCount += Add;
       return;
    }
    
    // Installed, no upgrade
-   if (State.Upgradable() == false)
-   {
+   if (State.Status == 0)
+   {	 
       if (State.Mode == ModeDelete)
 	 iDelCount += Add;
+      else
+	 if ((State.iFlags & ReInstall) == ReInstall)
+	    iInstCount += Add;
+      
       return;
    }
    
@@ -301,7 +368,7 @@ void pkgDepCache::BuildGroupOrs(VerIterator const &V)
 
       /* Invert for Conflicts. We have to do this twice to get the
          right sense for a conflicts group */
-      if (D->Type == Dep::Conflicts)
+      if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes)
 	 State = ~State;
       
       // Add to the group if we are within an or..
@@ -312,7 +379,7 @@ void pkgDepCache::BuildGroupOrs(VerIterator const &V)
 	 Group = 0;
       
       // Invert for Conflicts
-      if (D->Type == Dep::Conflicts)
+      if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes)
 	 State = ~State;
    }	 
 }
@@ -436,7 +503,7 @@ void pkgDepCache::Update(OpProgress *Prog)
 	 {
 	    // Build the dependency state.
 	    unsigned char &State = DepState[D->ID];
-	    State = DependencyState(D);;
+	    State = DependencyState(D);
 
 	    // Add to the group if we are within an or..
 	    Group |= State;
@@ -445,7 +512,7 @@ void pkgDepCache::Update(OpProgress *Prog)
 	       Group = 0;
 
 	    // Invert for Conflicts
-	    if (D->Type == Dep::Conflicts)
+	    if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes)
 	       State = ~State;
 	 }	 
       }
@@ -456,6 +523,8 @@ void pkgDepCache::Update(OpProgress *Prog)
       AddStates(I);
    }
 
+   readStateFile(Prog);
+
    if (Prog != 0)      
       Prog->Progress(Done);
 }
@@ -473,9 +542,9 @@ void pkgDepCache::Update(DepIterator D)
       State = DependencyState(D);
     
       // Invert for Conflicts
-      if (D->Type == Dep::Conflicts)
+      if (D->Type == Dep::Conflicts || D->Type == Dep::Obsoletes)
 	 State = ~State;
-      
+
       RemoveStates(D.ParentPkg());
       BuildGroupOrs(D.ParentVer());
       UpdateVerState(D.ParentPkg());
@@ -488,7 +557,7 @@ void pkgDepCache::Update(DepIterator D)
 /* This is called whenever the state of a package changes. It updates
    all cached dependencies related to this package. */
 void pkgDepCache::Update(PkgIterator const &Pkg)
-{
+{   
    // Recompute the dep of the package
    RemoveStates(Pkg);
    UpdateVerState(Pkg);
@@ -504,9 +573,10 @@ void pkgDepCache::Update(PkgIterator const &Pkg)
 	 Update(P.ParentPkg().RevDependsList());
 
    // Update the provides map for the candidate ver
-   for (PrvIterator P = PkgState[Pkg->ID].CandidateVerIter(*this).ProvidesList();
-	P.end() != true; P++)
-      Update(P.ParentPkg().RevDependsList());
+   if (PkgState[Pkg->ID].CandidateVer != 0)
+      for (PrvIterator P = PkgState[Pkg->ID].CandidateVerIter(*this).ProvidesList();
+	   P.end() != true; P++)
+	 Update(P.ParentPkg().RevDependsList());
 }
 
 									/*}}}*/
@@ -519,6 +589,12 @@ void pkgDepCache::MarkKeep(PkgIterator const &Pkg,bool Soft)
    // Simplifies other routines.
    if (Pkg.end() == true)
       return;
+
+   /* Reject an attempt to keep a non-source broken installed package, those
+      must be upgraded */
+   if (Pkg.State() == PkgIterator::NeedsUnpack && 
+       Pkg.CurrentVer().Downloadable() == false)
+      return;
    
    /* We changed the soft state all the time so the UI is a bit nicer
       to use */
@@ -556,7 +632,7 @@ void pkgDepCache::MarkKeep(PkgIterator const &Pkg,bool Soft)
 // DepCache::MarkDelete - Put the package in the delete state		/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-void pkgDepCache::MarkDelete(PkgIterator const &Pkg)
+void pkgDepCache::MarkDelete(PkgIterator const &Pkg, bool rPurge)
 {
    // Simplifies other routines.
    if (Pkg.end() == true)
@@ -564,10 +640,14 @@ void pkgDepCache::MarkDelete(PkgIterator const &Pkg)
 
    // Check that it is not already marked for delete
    StateCache &P = PkgState[Pkg->ID];
-   P.iFlags &= ~AutoKept;
-   if (P.Mode == ModeDelete || P.InstallVer == 0)
+   P.iFlags &= ~(AutoKept | Purge);
+   if (rPurge == true)
+      P.iFlags |= Purge;
+   
+   if ((P.Mode == ModeDelete || P.InstallVer == 0) && 
+       (Pkg.Purge() == true || rPurge == false))
       return;
-
+   
    // We dont even try to delete virtual packages..
    if (Pkg->VersionList == 0)
       return;
@@ -575,9 +655,13 @@ void pkgDepCache::MarkDelete(PkgIterator const &Pkg)
    RemoveSizes(Pkg);
    RemoveStates(Pkg);
    
-   P.Mode = ModeDelete;
+   if (Pkg->CurrentVer == 0 && (Pkg.Purge() == true || rPurge == false))
+      P.Mode = ModeKeep;
+   else
+      P.Mode = ModeDelete;
    P.InstallVer = 0;
-   P.Flags &= Flag::Auto;
+   // This was not inverted before, but I think it should be
+   P.Flags &= ~Flag::Auto;
 
    AddStates(Pkg);   
    Update(Pkg);
@@ -587,8 +671,12 @@ void pkgDepCache::MarkDelete(PkgIterator const &Pkg)
 // DepCache::MarkInstall - Put the package in the install state		/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst)
-{   
+void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst,
+			      unsigned long Depth)
+{
+   if (Depth > 100)
+      return;
+   
    // Simplifies other routines.
    if (Pkg.end() == true)
       return;
@@ -604,6 +692,10 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst)
 	 MarkKeep(Pkg);
       return;
    }
+
+   // See if there is even any possible instalation candidate
+   if (P.CandidateVer == 0)
+      return;
    
    // We dont even try to install virtual packages..
    if (Pkg->VersionList == 0)
@@ -634,7 +726,8 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst)
       // Grok or groups
       DepIterator Start = Dep;
       bool Result = true;
-      for (bool LastOR = true; Dep.end() == false && LastOR == true; Dep++)
+      unsigned Ors = 0;
+      for (bool LastOR = true; Dep.end() == false && LastOR == true; Dep++,Ors++)
       {
 	 LastOR = (Dep->CompareOp & Dep::Or) == Dep::Or;
 
@@ -653,24 +746,62 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst)
 	 continue;
       if (Pkg->CurrentVer != 0 && Start.IsCritical() == false)
 	 continue;
-
-      // Now we have to take action...
-      PkgIterator P = Start.SmartTargetPkg();
+      
+      /* If we are in an or group locate the first or that can 
+         succeed. We have already cached this.. */
+      for (; Ors > 1 && (DepState[Start->ID] & DepCVer) != DepCVer; Ors--)
+	 Start++;
+
+      /* This bit is for processing the possibilty of an install/upgrade
+         fixing the problem */
+      SPtrArray<Version *> List = Start.AllTargets();
       if ((DepState[Start->ID] & DepCVer) == DepCVer)
       {
-	 MarkInstall(P,true);
+	 // Right, find the best version to install..
+	 Version **Cur = List;
+	 PkgIterator P = Start.TargetPkg();
+	 PkgIterator InstPkg(*Cache,0);
 	 
-	 // Set the autoflag, after MarkInstall because MarkInstall unsets it
-	 if (P->CurrentVer == 0)
-	    PkgState[P->ID].Flags |= Flag::Auto;
+	 // See if there are direct matches (at the start of the list)
+	 for (; *Cur != 0 && (*Cur)->ParentPkg == P.Index(); Cur++)
+	 {
+	    PkgIterator Pkg(*Cache,Cache->PkgP + (*Cur)->ParentPkg);
+	    if (PkgState[Pkg->ID].CandidateVer != *Cur)
+	       continue;
+	    InstPkg = Pkg;
+	    break;
+	 }
+
+	 // Select the highest priority providing package
+	 if (InstPkg.end() == true)
+	 {
+	    pkgPrioSortList(*Cache,Cur);
+	    for (; *Cur != 0; Cur++)
+	    {
+	       PkgIterator Pkg(*Cache,Cache->PkgP + (*Cur)->ParentPkg);
+	       if (PkgState[Pkg->ID].CandidateVer != *Cur)
+		  continue;
+	       InstPkg = Pkg;
+	       break;
+	    }
+	 }
+	 
+	 if (InstPkg.end() == false)
+	 {
+	    MarkInstall(InstPkg,true,Depth + 1);
 
+	    // Set the autoflag, after MarkInstall because MarkInstall unsets it
+	    if (P->CurrentVer == 0)
+	       PkgState[InstPkg->ID].Flags |= Flag::Auto;
+	 }
+	 
 	 continue;
       }
       
-      // For conflicts we just de-install the package and mark as auto
-      if (Start->Type == Dep::Conflicts)
+      /* For conflicts we just de-install the package and mark as auto,
+         Conflicts may not have or groups */
+      if (Start->Type == Dep::Conflicts || Start->Type == Dep::Obsoletes)
       {
-	 Version **List = Start.AllTargets();
 	 for (Version **I = List; *I != 0; I++)
 	 {
 	    VerIterator Ver(*this,*I);
@@ -679,13 +810,50 @@ void pkgDepCache::MarkInstall(PkgIterator const &Pkg,bool AutoInst)
 	    MarkDelete(Pkg);
 	    PkgState[Pkg->ID].Flags |= Flag::Auto;
 	 }
-	 delete [] List;
 	 continue;
       }      
    }
 }
 									/*}}}*/
+// DepCache::SetReInstall - Set the reinstallation flag			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgDepCache::SetReInstall(PkgIterator const &Pkg,bool To)
+{
+   RemoveSizes(Pkg);
+   RemoveStates(Pkg);
+   
+   StateCache &P = PkgState[Pkg->ID];
+   if (To == true)
+      P.iFlags |= ReInstall;
+   else
+      P.iFlags &= ~ReInstall;
+   
+   AddStates(Pkg);
+   AddSizes(Pkg);
+}
+									/*}}}*/
+// DepCache::SetCandidateVersion - Change the candidate version		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgDepCache::SetCandidateVersion(VerIterator TargetVer)
+{
+   pkgCache::PkgIterator Pkg = TargetVer.ParentPkg();
+   StateCache &P = PkgState[Pkg->ID];
+   
+   RemoveSizes(Pkg);
+   RemoveStates(Pkg);
 
+   if (P.CandidateVer == P.InstallVer)
+      P.InstallVer = (Version *)TargetVer;
+   P.CandidateVer = (Version *)TargetVer;
+   P.Update(Pkg,*this);
+   
+   AddStates(Pkg);
+   Update(Pkg);
+   AddSizes(Pkg);
+}
+									/*}}}*/
 // StateCache::Update - Compute the various static display things	/*{{{*/
 // ---------------------------------------------------------------------
 /* This is called whenever the Candidate version changes. */
@@ -730,3 +898,48 @@ const char *pkgDepCache::StateCache::StripEpoch(const char *Ver)
    return Ver;
 }
 									/*}}}*/
+
+// Policy::GetCandidateVer - Returns the Candidate install version	/*{{{*/
+// ---------------------------------------------------------------------
+/* The default just returns the highest available version that is not
+   a source and automatic. */
+pkgCache::VerIterator pkgDepCache::Policy::GetCandidateVer(PkgIterator Pkg)
+{
+   /* Not source/not automatic versions cannot be a candidate version 
+      unless they are already installed */
+   VerIterator Last(*(pkgCache *)this,0);
+   
+   for (VerIterator I = Pkg.VersionList(); I.end() == false; I++)
+   {
+      if (Pkg.CurrentVer() == I)
+	 return I;
+      
+      for (VerFileIterator J = I.FileList(); J.end() == false; J++)
+      {
+	 if ((J.File()->Flags & Flag::NotSource) != 0)
+	    continue;
+
+	 /* Stash the highest version of a not-automatic source, we use it
+	    if there is nothing better */
+	 if ((J.File()->Flags & Flag::NotAutomatic) != 0)
+	 {
+	    if (Last.end() == true)
+	       Last = I;
+	    continue;
+	 }
+
+	 return I;
+      }
+   }
+   
+   return Last;
+}
+									/*}}}*/
+// Policy::IsImportantDep - True if the dependency is important		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgDepCache::Policy::IsImportantDep(DepIterator Dep)
+{
+   return Dep.IsCritical();
+}
+									/*}}}*/