Added a depends option to apt-cache

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

diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc
index 967aba1800de96c74d8fe1795b3e6a11d357efcf..9ca6ca590c514d53a2644dc3090763d159ea423a 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 1.16 1999/02/05 02:26:00 jgg Exp $
+// $Id: algorithms.cc,v 1.21 1999/07/09 04:11:33 jgg Exp $
 /* ######################################################################
 
    Algorithms - A set of misc algorithms
@@ -33,6 +33,11 @@ pkgSimulate::pkgSimulate(pkgDepCache &Cache) : pkgPackageManager(Cache),
 {
    Flags = new unsigned char[Cache.HeaderP->PackageCount];
    memset(Flags,0,sizeof(*Flags)*Cache.HeaderP->PackageCount);
+
+   // Fake a filename so as not to activate the media swapping
+   string Jnk = "SIMULATE";
+   for (int I = 0; I != Cache.Head().PackageCount; I++)
+      FileNames[I] = Jnk;
 }
                                                                        /*}}}*/
 // Simulate::Install - Simulate unpacking of a package                 /*{{{*/
@@ -120,14 +125,17 @@ bool pkgSimulate::Configure(PkgIterator iPkg)
 // Simulate::Remove - Simulate the removal of a package                        /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool pkgSimulate::Remove(PkgIterator iPkg)
+bool pkgSimulate::Remove(PkgIterator iPkg,bool Purge)
 {
    // Adapt the iterator
    PkgIterator Pkg = Sim.FindPkg(iPkg.Name());
 
    Flags[Pkg->ID] = 3;
    Sim.MarkDelete(Pkg);
-   cout << "Remv " << Pkg.Name();
+   if (Purge == true)
+      cout << "Purg " << Pkg.Name();
+   else
+      cout << "Remv " << Pkg.Name();
 
    if (Sim.BrokenCount() != 0)
       ShortBreaks();
@@ -169,16 +177,37 @@ bool pkgApplyStatus(pkgDepCache &Cache)
       if (I->InstState == pkgCache::State::ReInstReq ||
          I->InstState == pkgCache::State::HoldReInstReq)
       {
-        Cache.MarkKeep(I);
+        if (I.CurrentVer().Downloadable() == true)
+           Cache.MarkKeep(I);
+        else
+        {
+           // Is this right? Will dpkg choke on an upgrade?
+           if (Cache[I].CandidateVerIter(Cache).Downloadable() == true)
+              Cache.MarkInstall(I);
+           else
+              return _error->Error("The package %s needs to be reinstalled, "
+                                   "but I can't find an archive for it.",I.Name());
+        }
+        
         continue;
       }
       
       switch (I->CurrentState)
       {
-        // This means installation failed somehow
+        /* This means installation failed somehow - it does not need to be
+           re-unpacked (probably) */
         case pkgCache::State::UnPacked:
         case pkgCache::State::HalfConfigured:
-        Cache.MarkKeep(I);
+        if (I.CurrentVer().Downloadable() == true || 
+            I.State() != pkgCache::PkgIterator::NeedsUnpack)
+           Cache.MarkKeep(I);
+        else
+        {
+           if (Cache[I].CandidateVerIter(Cache).Downloadable() == true)
+              Cache.MarkInstall(I);
+           else
+              Cache.MarkDelete(I);
+        }
         break;
 
         // This means removal failed
@@ -734,10 +763,16 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                   ((Cache[End] & pkgDepCache::DepGNow) == 0 &&
                    End->Type != pkgCache::Dep::Conflicts))
               {
+                 // Try a little harder to fix protected packages..
                  if ((Flags[I->ID] & Protected) == Protected)
+                 {
+                    if (DoUpgrade(Pkg) == true)
+                       Scores[Pkg->ID] = Scores[I->ID];
                     continue;
-
-                 // See if a keep will do
+                 }
+                 
+                 /* See if a keep will do, unless the package is protected,
+                    then installing it will be necessary */    
                  Cache.MarkKeep(I);
                  if (Cache[I].InstBroken() == false)
                  {
@@ -755,7 +790,7 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
                           Scores[I->ID] = Scores[Pkg->ID];
                     }
                  }
-
+                                 
                  Change = true;
                  Done = true;
                  break;
@@ -835,8 +870,19 @@ bool pkgProblemResolver::Resolve(bool BrokenFix)
    delete [] PList;
    
    if (Cache.BrokenCount() != 0)
-      return _error->Error("Internal error, pkgProblemResolver::Resolve generated breaks.");
-
+   {
+      // See if this is the result of a hold
+      pkgCache::PkgIterator I = Cache.PkgBegin();
+      for (;I.end() != true; I++)
+      {
+        if (Cache[I].InstBroken() == false)
+           continue;
+        if ((Flags[I->ID] & Protected) != Protected)
+           return _error->Error("Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.");
+      }
+      return _error->Error("Unable to correct problems, you have held broken packages.");
+   }
+   
    return true;
 }
                                                                        /*}}}*/