]> git.saurik.com Git - apt.git/blobdiff - apt-pkg/packagemanager.cc
warning: unused parameter ‘foo’ [-Wunused-parameter]
[apt.git] / apt-pkg / packagemanager.cc
index 5ba1225a0587cb6da8f6fc506bc3442e13ba4605..0be76b31132a6a1779226bd0980d3037cbb0b5c8 100644 (file)
@@ -25,9 +25,9 @@
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/sptr.h>
 
-#include <apti18n.h>
 #include <iostream>
-#include <fcntl.h>
+
+#include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 
@@ -215,7 +215,7 @@ bool pkgPackageManager::CreateOrderList()
    return true;
 }
                                                                        /*}}}*/
-// PM::DepAlwaysTrue - Returns true if this dep is irrelevent          /*{{{*/
+// PM::DepAlwaysTrue - Returns true if this dep is irrelevant          /*{{{*/
 // ---------------------------------------------------------------------
 /* The restriction on provides is to eliminate the case when provides
    are transitioning between valid states [ie exim to smail] */
@@ -243,11 +243,11 @@ bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
          D->Type != pkgCache::Dep::Obsoletes)
         continue;
 
-      // The package hasnt been changed
+      // The package hasn't been changed
       if (List->IsNow(Pkg) == false)
         continue;
       
-      // Ignore self conflicts, ignore conflicts from irrelevent versions
+      // Ignore self conflicts, ignore conflicts from irrelevant versions
       if (D.IsIgnorable(Pkg) || D.ParentVer() != D.ParentPkg().CurrentVer())
         continue;
       
@@ -314,7 +314,7 @@ bool pkgPackageManager::ConfigureAll()
    
    Note on failure: This method can fail, without causing any problems. 
    This can happen when using Immediate-Configure-All, SmartUnPack may call
-   SmartConfigure, it may fail because of a complex dependancy situation, but
+   SmartConfigure, it may fail because of a complex dependency situation, but
    a error will only be reported if ConfigureAll fails. This is why some of the
    messages this function reports on failure (return false;) as just warnings
    only shown when debuging*/
@@ -337,7 +337,11 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
       however if there is a loop (A depends on B, B depends on A) this will not 
       be the case, so check for dependencies before configuring. */
    bool Bad = false, Changed = false;
-   do {
+   const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);
+   unsigned int i=0;
+   std::list<DepIterator> needConfigure;
+   do
+   {
       Changed = false;
       for (DepIterator D = instVer.DependsList(); D.end() == false; )
       {
@@ -349,7 +353,7 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
            continue;
         Bad = true;
 
-        // Search for dependencies which are unpacked but aren't configured yet (maybe loops)
+        // Check for dependencies that have not been unpacked, probably due to loops.
         for (DepIterator Cur = Start; true; ++Cur)
         {
            SPtrArray<Version *> VList = Cur.AllTargets();
@@ -369,51 +373,66 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
               }
 
               // Check if the version that is going to be installed will satisfy the dependency
-              if (Cache[DepPkg].InstallVer != *I)
+              if (Cache[DepPkg].InstallVer != *I || List->IsNow(DepPkg) == false)
                  continue;
 
-              if (List->IsFlag(DepPkg,pkgOrderList::UnPacked))
+              if (PkgLoop == true)
               {
-                 if (List->IsFlag(DepPkg,pkgOrderList::Loop) && PkgLoop)
-                 {
-                   // This dependency has already been dealt with by another SmartConfigure on Pkg
-                   Bad = false;
-                   break;
-                 }
-                 /* Check for a loop to prevent one forming
-                      If A depends on B and B depends on A, SmartConfigure will
-                      just hop between them if this is not checked. Dont remove the
-                      loop flag after finishing however as loop is already set.
-                      This means that there is another SmartConfigure call for this
-                      package and it will remove the loop flag */
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "Package " << Pkg << " loops in SmartConfigure" << std::endl;
+                 Bad = false;
+                 break;
+              }
+              else
+              {
+                 if (Debug)
+                    clog << OutputInDepth(Depth) << "Unpacking " << DepPkg.FullName() << " to avoid loop " << Cur << endl;
                  if (PkgLoop == false)
                     List->Flag(Pkg,pkgOrderList::Loop);
-                 if (SmartConfigure(DepPkg, Depth + 1) == true)
+                 if (SmartUnPack(DepPkg, true, Depth + 1) == true)
                  {
                     Bad = false;
                     if (List->IsFlag(DepPkg,pkgOrderList::Loop) == false)
-                       Changed = true;
+                       Changed = true;
                  }
                  if (PkgLoop == false)
-                   List->RmFlag(Pkg,pkgOrderList::Loop);
-                 // If SmartConfigure was succesfull, Bad is false, so break
+                    List->RmFlag(Pkg,pkgOrderList::Loop);
                  if (Bad == false)
                     break;
               }
-              else if (List->IsFlag(DepPkg,pkgOrderList::Configured))
-              {
-                 Bad = false;
-                 break;
-              }
            }
-           if (Cur == End)
+
+           if (Cur == End || Bad == false)
               break;
-         }
+        }
 
         if (Bad == false)
            continue;
 
-        // Check for dependencies that have not been unpacked, probably due to loops.
+        needConfigure.push_back(Start);
+      }
+      if (i++ > max_loops)
+         return _error->Error("Internal error: MaxLoopCount reached in SmartUnPack (1) for %s, aborting", Pkg.FullName().c_str());
+   } while (Changed == true);
+
+   Bad = false, Changed = false, i = 0;
+   do
+   {
+      Changed = false;
+      for (std::list<DepIterator>::const_iterator D = needConfigure.begin(); D != needConfigure.end(); ++D)
+      {
+        // Compute a single dependency element (glob or) without modifying D
+        pkgCache::DepIterator Start, End;
+        {
+           pkgCache::DepIterator Discard = *D;
+           Discard.GlobOr(Start,End);
+        }
+
+        if (End->Type != pkgCache::Dep::Depends)
+           continue;
+        Bad = true;
+
+        // Search for dependencies which are unpacked but aren't configured yet (maybe loops)
         for (DepIterator Cur = Start; true; ++Cur)
         {
            SPtrArray<Version *> VList = Cur.AllTargets();
@@ -424,42 +443,53 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
               PkgIterator DepPkg = Ver.ParentPkg();
 
               // Check if the version that is going to be installed will satisfy the dependency
-              if (Cache[DepPkg].InstallVer != *I || List->IsNow(DepPkg) == false)
+              if (Cache[DepPkg].InstallVer != *I)
                  continue;
 
-              if (PkgLoop == true)
-              {
-                 if (Debug)
-                    std::clog << OutputInDepth(Depth) << "Package " << Pkg << " loops in SmartConfigure" << std::endl;
-                 Bad = false;
-                 break;
-              }
-              else
+              if (List->IsFlag(DepPkg,pkgOrderList::UnPacked))
               {
-                 if (Debug)
-                    cout << OutputInDepth(Depth) << "Unpacking " << DepPkg.FullName() << " to avoid loop " << Cur << endl;
+                 if (List->IsFlag(DepPkg,pkgOrderList::Loop) && PkgLoop)
+                 {
+                   // This dependency has already been dealt with by another SmartConfigure on Pkg
+                   Bad = false;
+                   break;
+                 }
+                 /* Check for a loop to prevent one forming
+                      If A depends on B and B depends on A, SmartConfigure will
+                      just hop between them if this is not checked. Dont remove the
+                      loop flag after finishing however as loop is already set.
+                      This means that there is another SmartConfigure call for this
+                      package and it will remove the loop flag */
                  if (PkgLoop == false)
                     List->Flag(Pkg,pkgOrderList::Loop);
-                 if (SmartUnPack(DepPkg, true, Depth + 1) == true)
+                 if (SmartConfigure(DepPkg, Depth + 1) == true)
                  {
                     Bad = false;
                     if (List->IsFlag(DepPkg,pkgOrderList::Loop) == false)
-                       Changed = true;
+                       Changed = true;
                  }
                  if (PkgLoop == false)
-                    List->RmFlag(Pkg,pkgOrderList::Loop);
+                   List->RmFlag(Pkg,pkgOrderList::Loop);
+                 // If SmartConfigure was succesfull, Bad is false, so break
                  if (Bad == false)
                     break;
               }
+              else if (List->IsFlag(DepPkg,pkgOrderList::Configured))
+              {
+                 Bad = false;
+                 break;
+              }
            }
-
-           if (Cur == End)
+           if (Cur == End || Bad == false)
               break;
-        }
+         }
+
 
         if (Bad == true && Changed == false && Debug == true)
-           std::clog << OutputInDepth(Depth) << "Could not satisfy " << Start << std::endl;
+           std::clog << OutputInDepth(Depth) << "Could not satisfy " << *D << std::endl;
       }
+      if (i++ > max_loops)
+         return _error->Error("Internal error: MaxLoopCount reached in SmartUnPack (2) for %s, aborting", Pkg.FullName().c_str());
    } while (Changed == true);
    
    if (Bad) {
@@ -486,6 +516,7 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
           P.end() == false; P = Pkg.Group().NextPkg(P))
       {
         if (Pkg == P || List->IsFlag(P,pkgOrderList::Configured) == true ||
+            List->IsFlag(P,pkgOrderList::UnPacked) == false ||
             Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
              (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
            continue;
@@ -565,7 +596,7 @@ bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
                                                                        /*}}}*/
 // PM::SmartUnPack - Install helper                                    /*{{{*/
 // ---------------------------------------------------------------------
-/* This puts the system in a state where it can Unpack Pkg, if Pkg is allready
+/* This puts the system in a state where it can Unpack Pkg, if Pkg is already
    unpacked, or when it has been unpacked, if Immediate==true it configures it. */
 bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
 {
@@ -579,218 +610,255 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
       clog << OutputInDepth(Depth) << "SmartUnPack " << Pkg.FullName();
       VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
       if (Pkg.CurrentVer() == 0)
-        cout << " (install version " << InstallVer.VerStr() << ")";
+        clog << " (install version " << InstallVer.VerStr() << ")";
       else
-        cout << " (replace version " << Pkg.CurrentVer().VerStr() << " with " << InstallVer.VerStr() << ")";
+        clog << " (replace version " << Pkg.CurrentVer().VerStr() << " with " << InstallVer.VerStr() << ")";
       if (PkgLoop)
-        cout << " (Only Perform PreUnpack Checks)";
-      cout << endl;
+        clog << " (Only Perform PreUnpack Checks)";
+      clog << endl;
    }
 
    VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
 
    /* PreUnpack Checks: This loop checks and attempts to rectify and problems that would prevent the package being unpacked.
-      It addresses: PreDepends, Conflicts, Obsoletes and Breaks (DpkgBreaks). Any resolutions that do not require it should 
+      It addresses: PreDepends, Conflicts, Obsoletes and Breaks (DpkgBreaks). Any resolutions that do not require it should
       avoid configuration (calling SmartUnpack with Immediate=true), this is because when unpacking some packages with
-      complex dependancy structures, trying to configure some packages while breaking the loops can complicate things . 
-      This will be either dealt with if the package is configured as a dependency of Pkg (if and when Pkg is configured), 
+      complex dependency structures, trying to configure some packages while breaking the loops can complicate things .
+      This will be either dealt with if the package is configured as a dependency of Pkg (if and when Pkg is configured),
       or by the ConfigureAll call at the end of the for loop in OrderInstall. */
-   for (DepIterator D = instVer.DependsList();
-       D.end() == false; )
+   bool Changed = false;
+   const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);
+   unsigned int i = 0;
+   do 
    {
-      // Compute a single dependency element (glob or)
-      pkgCache::DepIterator Start;
-      pkgCache::DepIterator End;
-      D.GlobOr(Start,End);
-      
-      while (End->Type == pkgCache::Dep::PreDepends)
+      Changed = false;
+      for (DepIterator D = instVer.DependsList(); D.end() == false; )
       {
-        if (Debug)
-           clog << OutputInDepth(Depth) << "PreDepends order for " << Pkg.FullName() << std::endl;
+        // Compute a single dependency element (glob or)
+        pkgCache::DepIterator Start, End;
+        D.GlobOr(Start,End);
 
-        // Look for possible ok targets.
-        SPtrArray<Version *> VList = Start.AllTargets();
-        bool Bad = true;
-        for (Version **I = VList; *I != 0 && Bad == true; I++)
-        {
-           VerIterator Ver(Cache,*I);
-           PkgIterator Pkg = Ver.ParentPkg();
-           
-           // See if the current version is ok
-           if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true && 
-               Pkg.State() == PkgIterator::NeedsNothing)
+        if (End->Type == pkgCache::Dep::PreDepends)
+         {
+           bool Bad = true;
+           if (Debug)
+              clog << OutputInDepth(Depth) << "PreDepends order for " << Pkg.FullName() << std::endl;
+
+           // Look for easy targets: packages that are already okay
+           for (DepIterator Cur = Start; Bad == true; ++Cur)
            {
-              Bad = false;
-              if (Debug)
-                 clog << OutputInDepth(Depth) << "Found ok package " << Pkg.FullName() << endl;
-              continue;
-           }
-        }
-        
-        // Look for something that could be configured.
-        for (Version **I = VList; *I != 0 && Bad == true; I++)
-        {
-           VerIterator Ver(Cache,*I);
-           PkgIterator Pkg = Ver.ParentPkg();
-           
-           // Not the install version 
-           if (Cache[Pkg].InstallVer != *I || 
-               (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
-              continue;
-              
-           if (List->IsFlag(Pkg,pkgOrderList::Configured)) {
-              Bad = false;
-              continue;
+              SPtrArray<Version *> VList = Cur.AllTargets();
+              for (Version **I = VList; *I != 0; ++I)
+              {
+                 VerIterator Ver(Cache,*I);
+                 PkgIterator Pkg = Ver.ParentPkg();
+
+                 // See if the current version is ok
+                 if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true &&
+                     Pkg.State() == PkgIterator::NeedsNothing)
+                 {
+                    Bad = false;
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Found ok package " << Pkg.FullName() << endl;
+                    break;
+                 }
+              }
+              if (Cur == End)
+                 break;
            }
 
-            // check if it needs unpack or if if configure is enough
-            if (!List->IsFlag(Pkg,pkgOrderList::UnPacked))
-            {
-               if (Debug)
-                  clog << OutputInDepth(Depth) << "Trying to SmartUnpack " << Pkg.FullName() << endl;
-               // SmartUnpack with the ImmediateFlag to ensure its really ready
-               Bad = !SmartUnPack(Pkg, true, Depth + 1);
-            } else {
-               if (Debug)
-                  clog << OutputInDepth(Depth) << "Trying to SmartConfigure " << Pkg.FullName() << endl;
-               Bad = !SmartConfigure(Pkg, Depth + 1);
-            }
-         }
+           // Look for something that could be configured.
+           for (DepIterator Cur = Start; Bad == true && Cur.end() == false; ++Cur)
+           {
+              SPtrArray<Version *> VList = Cur.AllTargets();
+              for (Version **I = VList; *I != 0; ++I)
+              {
+                 VerIterator Ver(Cache,*I);
+                 PkgIterator Pkg = Ver.ParentPkg();
 
-        /* If this or element did not match then continue on to the
-           next or element until a matching element is found */
-        if (Bad == true)
-        {
-           // This triggers if someone make a pre-depends/depend loop.
-           if (Start == End)
-              return _error->Error("Couldn't configure pre-depend %s for %s, "
-                                   "probably a dependency cycle.",
-                                   End.TargetPkg().FullName().c_str(),Pkg.FullName().c_str());
-           ++Start;
-        }
-        else 
-           break;
-      }
-      
-      if (End->Type == pkgCache::Dep::Conflicts || 
-         End->Type == pkgCache::Dep::Obsoletes)
-      {
-        /* Look for conflicts. Two packages that are both in the install
-           state cannot conflict so we don't check.. */
-        SPtrArray<Version *> VList = End.AllTargets();
-        for (Version **I = VList; *I != 0; I++)
-        {
-           VerIterator Ver(Cache,*I);
-           PkgIterator ConflictPkg = Ver.ParentPkg();
-           VerIterator InstallVer(Cache,Cache[ConflictPkg].InstallVer);
-           
-           // See if the current version is conflicting
-           if (ConflictPkg.CurrentVer() == Ver && List->IsNow(ConflictPkg))
-           { 
-              cout << OutputInDepth(Depth) << Pkg.FullName() << " conflicts with " << ConflictPkg.FullName() << endl;
-              /* If a loop is not present or has not yet been detected, attempt to unpack packages 
-                 to resolve this conflict. If there is a loop present, remove packages to resolve this conflict */
-              if (!List->IsFlag(ConflictPkg,pkgOrderList::Loop)) {
-                 if (Cache[ConflictPkg].Keep() == 0 && Cache[ConflictPkg].InstallVer != 0) {
-                     if (Debug)
-                        cout << OutputInDepth(Depth) << OutputInDepth(Depth) << "Unpacking " << ConflictPkg.FullName() << " to prevent conflict" << endl;
-                      List->Flag(Pkg,pkgOrderList::Loop);
-                     SmartUnPack(ConflictPkg,false, Depth + 1);
-                     // Remove loop to allow it to be used later if needed
-                     List->RmFlag(Pkg,pkgOrderList::Loop);
-                  } else {
-                      if (EarlyRemove(ConflictPkg) == false)
-                         return _error->Error("Internal Error, Could not early remove %s",ConflictPkg.FullName().c_str());
-                  }
-              } else {
-                 if (!List->IsFlag(ConflictPkg,pkgOrderList::Removed)) {
-                     if (Debug)
-                         cout << OutputInDepth(Depth) << "Because of conficts knot, removing " << ConflictPkg.FullName() << " to conflict violation" << endl;
-                     if (EarlyRemove(ConflictPkg) == false)
-                          return _error->Error("Internal Error, Could not early remove %s",ConflictPkg.FullName().c_str());
-                 }
+                 // Not the install version
+                 if (Cache[Pkg].InstallVer != *I ||
+                     (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
+                    continue;
+
+                 if (List->IsFlag(Pkg,pkgOrderList::Configured))
+                 {
+                    Bad = false;
+                    break;
+                 }
+
+                 // check if it needs unpack or if if configure is enough
+                 if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == false)
+                 {
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Trying to SmartUnpack " << Pkg.FullName() << endl;
+                    // SmartUnpack with the ImmediateFlag to ensure its really ready
+                    if (SmartUnPack(Pkg, true, Depth + 1) == true)
+                    {
+                       Bad = false;
+                       if (List->IsFlag(Pkg,pkgOrderList::Loop) == false)
+                          Changed = true;
+                       break;
+                    }
+                 }
+                 else
+                 {
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Trying to SmartConfigure " << Pkg.FullName() << endl;
+                    if (SmartConfigure(Pkg, Depth + 1) == true)
+                    {
+                       Bad = false;
+                       if (List->IsFlag(Pkg,pkgOrderList::Loop) == false)
+                          Changed = true;
+                       break;
+                    }
+                 }
               }
            }
+
+           if (Bad == true)
+           {
+              if (Start == End)
+                 return _error->Error("Couldn't configure pre-depend %s for %s, "
+                                       "probably a dependency cycle.",
+                                       End.TargetPkg().FullName().c_str(),Pkg.FullName().c_str());
+           }
+           else
+              continue;
         }
-      }
-      
-      // Check for breaks
-      if (End->Type == pkgCache::Dep::DpkgBreaks) {
-         SPtrArray<Version *> VList = End.AllTargets();
-        for (Version **I = VList; *I != 0; I++)
+        else if (End->Type == pkgCache::Dep::Conflicts ||
+                 End->Type == pkgCache::Dep::Obsoletes)
         {
-           VerIterator Ver(Cache,*I);
-           PkgIterator BrokenPkg = Ver.ParentPkg();
-           if (BrokenPkg.CurrentVer() != Ver)
+           /* Look for conflicts. Two packages that are both in the install
+              state cannot conflict so we don't check.. */
+           SPtrArray<Version *> VList = End.AllTargets();
+           for (Version **I = VList; *I != 0; I++)
            {
-              if (Debug)
-                 std::clog << OutputInDepth(Depth) << "  Ignore not-installed version " << Ver.VerStr() << " of " << Pkg.FullName() << " for " << End << std::endl;
-              continue;
-           }
+              VerIterator Ver(Cache,*I);
+              PkgIterator ConflictPkg = Ver.ParentPkg();
+              VerIterator InstallVer(Cache,Cache[ConflictPkg].InstallVer);
 
-           // Check if it needs to be unpacked
-           if (List->IsFlag(BrokenPkg,pkgOrderList::InList) && Cache[BrokenPkg].Delete() == false &&
-               List->IsNow(BrokenPkg)) {
-              if (List->IsFlag(BrokenPkg,pkgOrderList::Loop) && PkgLoop) {
-                 // This dependancy has already been dealt with by another SmartUnPack on Pkg
-                 break;
-              } else {
-                 // Found a break, so see if we can unpack the package to avoid it
-                 // but do not set loop if another SmartUnPack already deals with it
-                 VerIterator InstallVer(Cache,Cache[BrokenPkg].InstallVer);
-                 bool circle = false;
-                 for (pkgCache::DepIterator D = InstallVer.DependsList(); D.end() == false; ++D)
+              // See if the current version is conflicting
+              if (ConflictPkg.CurrentVer() == Ver && List->IsNow(ConflictPkg))
+              {
+                 if (Debug)
+                    clog << OutputInDepth(Depth) << Pkg.FullName() << " conflicts with " << ConflictPkg.FullName() << endl;
+                 /* If a loop is not present or has not yet been detected, attempt to unpack packages
+                    to resolve this conflict. If there is a loop present, remove packages to resolve this conflict */
+                 if (List->IsFlag(ConflictPkg,pkgOrderList::Loop) == false)
                  {
-                    if (D->Type != pkgCache::Dep::PreDepends)
-                       continue;
-                    SPtrArray<Version *> VL = D.AllTargets();
-                    for (Version **I = VL; *I != 0; ++I)
+                    if (Cache[ConflictPkg].Keep() == 0 && Cache[ConflictPkg].InstallVer != 0)
                     {
-                       VerIterator V(Cache,*I);
-                       PkgIterator P = V.ParentPkg();
-                       // we are checking for installation as an easy 'protection' against or-groups and (unchosen) providers
-                       if (P->CurrentVer == 0 || P != Pkg || (P.CurrentVer() != V && Cache[P].InstallVer != V))
-                          continue;
-                       circle = true;
-                       break;
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << OutputInDepth(Depth) << "Unpacking " << ConflictPkg.FullName() << " to prevent conflict" << endl;
+                       List->Flag(Pkg,pkgOrderList::Loop);
+                       if (SmartUnPack(ConflictPkg,false, Depth + 1) == true)
+                          if (List->IsFlag(ConflictPkg,pkgOrderList::Loop) == false)
+                             Changed = true;
+                       // Remove loop to allow it to be used later if needed
+                       List->RmFlag(Pkg,pkgOrderList::Loop);
                     }
-                    if (circle == true)
-                       break;
+                    else if (EarlyRemove(ConflictPkg) == false)
+                       return _error->Error("Internal Error, Could not early remove %s (1)",ConflictPkg.FullName().c_str());
                  }
-                 if (circle == true)
+                 else if (List->IsFlag(ConflictPkg,pkgOrderList::Removed) == false)
                  {
                     if (Debug)
-                       cout << OutputInDepth(Depth) << "  Avoiding " << End << " avoided as " << BrokenPkg.FullName() << " has a pre-depends on " << Pkg.FullName() << std::endl;
-                    continue;
+                       clog << OutputInDepth(Depth) << "Because of conficts knot, removing " << ConflictPkg.FullName() << " to conflict violation" << endl;
+                    if (EarlyRemove(ConflictPkg) == false)
+                       return _error->Error("Internal Error, Could not early remove %s (2)",ConflictPkg.FullName().c_str());
+                 }
+              }
+           }
+        }
+        else if (End->Type == pkgCache::Dep::DpkgBreaks)
+        {
+           SPtrArray<Version *> VList = End.AllTargets();
+           for (Version **I = VList; *I != 0; ++I)
+           {
+              VerIterator Ver(Cache,*I);
+              PkgIterator BrokenPkg = Ver.ParentPkg();
+              if (BrokenPkg.CurrentVer() != Ver)
+              {
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "  Ignore not-installed version " << Ver.VerStr() << " of " << Pkg.FullName() << " for " << End << std::endl;
+                 continue;
+              }
+
+              // Check if it needs to be unpacked
+              if (List->IsFlag(BrokenPkg,pkgOrderList::InList) && Cache[BrokenPkg].Delete() == false &&
+                  List->IsNow(BrokenPkg))
+              {
+                 if (List->IsFlag(BrokenPkg,pkgOrderList::Loop) && PkgLoop)
+                 {
+                    // This dependency has already been dealt with by another SmartUnPack on Pkg
+                    break;
                  }
                  else
                  {
-                    if (Debug)
+                    // Found a break, so see if we can unpack the package to avoid it
+                    // but do not set loop if another SmartUnPack already deals with it
+                    // Also, avoid it if the package we would unpack pre-depends on this one
+                    VerIterator InstallVer(Cache,Cache[BrokenPkg].InstallVer);
+                    bool circle = false;
+                    for (pkgCache::DepIterator D = InstallVer.DependsList(); D.end() == false; ++D)
                     {
-                       cout << OutputInDepth(Depth) << "  Unpacking " << BrokenPkg.FullName() << " to avoid " << End;
-                       if (PkgLoop == true)
-                          cout << " (Looping)";
-                       cout << std::endl;
+                       if (D->Type != pkgCache::Dep::PreDepends)
+                          continue;
+                       SPtrArray<Version *> VL = D.AllTargets();
+                       for (Version **I = VL; *I != 0; ++I)
+                       {
+                          VerIterator V(Cache,*I);
+                          PkgIterator P = V.ParentPkg();
+                          // we are checking for installation as an easy 'protection' against or-groups and (unchosen) providers
+                          if (P != Pkg || (P.CurrentVer() != V && Cache[P].InstallVer != V))
+                             continue;
+                          circle = true;
+                          break;
+                       }
+                       if (circle == true)
+                          break;
+                    }
+                    if (circle == true)
+                    {
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << "  Avoiding " << End << " avoided as " << BrokenPkg.FullName() << " has a pre-depends on " << Pkg.FullName() << std::endl;
+                       continue;
+                    }
+                    else
+                    {
+                       if (Debug)
+                       {
+                          clog << OutputInDepth(Depth) << "  Unpacking " << BrokenPkg.FullName() << " to avoid " << End;
+                          if (PkgLoop == true)
+                             clog << " (Looping)";
+                          clog << std::endl;
+                       }
+                       if (PkgLoop == false)
+                          List->Flag(Pkg,pkgOrderList::Loop);
+                       if (SmartUnPack(BrokenPkg, false, Depth + 1) == true)
+                       {
+                          if (List->IsFlag(BrokenPkg,pkgOrderList::Loop) == false)
+                             Changed = true;
+                       }
+                       if (PkgLoop == false)
+                          List->RmFlag(Pkg,pkgOrderList::Loop);
                     }
-                    if (PkgLoop == false)
-                       List->Flag(Pkg,pkgOrderList::Loop);
-                    SmartUnPack(BrokenPkg, false, Depth + 1);
-                    if (PkgLoop == false)
-                       List->RmFlag(Pkg,pkgOrderList::Loop);
                  }
               }
-           } else {
               // Check if a package needs to be removed
-              if (Cache[BrokenPkg].Delete() == true && !List->IsFlag(BrokenPkg,pkgOrderList::Configured))
+              else if (Cache[BrokenPkg].Delete() == true && List->IsFlag(BrokenPkg,pkgOrderList::Configured) == false)
               {
                  if (Debug)
-                    cout << OutputInDepth(Depth) << "  Removing " << BrokenPkg.FullName() << " to avoid " << End << endl;
+                    clog << OutputInDepth(Depth) << "  Removing " << BrokenPkg.FullName() << " to avoid " << End << endl;
                  SmartRemove(BrokenPkg);
               }
            }
         }
       }
-   }
+      if (i++ > max_loops)
+         return _error->Error("Internal error: APT::pkgPackageManager::MaxLoopCount reached in SmartConfigure for %s, aborting", Pkg.FullName().c_str());
+   } while (Changed == true);
    
    // Check for reverse conflicts.
    if (CheckRConflicts(Pkg,Pkg.RevDependsList(),
@@ -814,7 +882,10 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
         This way we avoid that M-A: enabled packages are installed before
         their older non-M-A enabled packages are replaced by newer versions */
       bool const installed = Pkg->CurrentVer != 0;
-      if (installed == true && Install(Pkg,FileNames[Pkg->ID]) == false)
+      if (installed == true &&
+         (instVer != Pkg.CurrentVer() ||
+          ((Cache[Pkg].iFlags & pkgDepCache::ReInstall) == pkgDepCache::ReInstall)) &&
+         Install(Pkg,FileNames[Pkg->ID]) == false)
         return false;
       for (PkgIterator P = Pkg.Group().PackageList();
           P.end() == false; P = Pkg.Group().NextPkg(P))
@@ -832,6 +903,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
           P.end() == false; P = Pkg.Group().NextPkg(P))
       {
         if (P->CurrentVer != 0 || P == Pkg || List->IsFlag(P,pkgOrderList::UnPacked) == true ||
+            List->IsFlag(P,pkgOrderList::Configured) == true ||
             Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
              (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
            continue;
@@ -840,7 +912,9 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
       }
    }
    // packages which are already unpacked don't need to be unpacked again
-   else if (Pkg.State() != pkgCache::PkgIterator::NeedsConfigure && Install(Pkg,FileNames[Pkg->ID]) == false)
+   else if ((instVer != Pkg.CurrentVer() ||
+            ((Cache[Pkg].iFlags & pkgDepCache::ReInstall) == pkgDepCache::ReInstall)) &&
+           Install(Pkg,FileNames[Pkg->ID]) == false)
       return false;
 
    if (Immediate == true) {
@@ -930,7 +1004,7 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
       DoneSomething = true;
       
       if (ImmConfigureAll) {
-         /* ConfigureAll here to pick up and packages left unconfigured becuase they were unpacked in the 
+         /* ConfigureAll here to pick up and packages left unconfigured because they were unpacked in the
             "PreUnpack Checks" section */
          if (!ConfigureAll())
             return Failed; 
@@ -953,33 +1027,79 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
    }
         
    return Completed;
+}
+// PM::DoInstallPostFork - compat /*{{{*/
+// ---------------------------------------------------------------------
+                                                                       /*}}}*/
+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
+pkgPackageManager::OrderResult
+pkgPackageManager::DoInstallPostFork(int statusFd)
+{
+   APT::Progress::PackageManager *progress = new
+      APT::Progress::PackageManagerProgressFd(statusFd);
+   pkgPackageManager::OrderResult res = DoInstallPostFork(progress);
+   delete progress;
+   return res;
 }
                                                                        /*}}}*/
 // PM::DoInstallPostFork - Does install part that happens after the fork /*{{{*/
 // ---------------------------------------------------------------------
 pkgPackageManager::OrderResult 
-pkgPackageManager::DoInstallPostFork(int statusFd)
+pkgPackageManager::DoInstallPostFork(APT::Progress::PackageManager *progress)
 {
-      if(statusFd > 0)
-         // FIXME: use SetCloseExec here once it taught about throwing
-        //        exceptions instead of doing _exit(100) on failure
-        fcntl(statusFd,F_SETFD,FD_CLOEXEC); 
-      bool goResult = Go(statusFd);
-      if(goResult == false) 
-        return Failed;
-
-      return Res;
+   bool goResult = Go(progress);
+   if(goResult == false) 
+      return Failed;
+   
+   return Res;
 };
+#else
+pkgPackageManager::OrderResult
+pkgPackageManager::DoInstallPostFork(int statusFd)
+{
+   bool goResult = Go(statusFd);
+   if(goResult == false) 
+      return Failed;
+   
+   return Res;
+}
+#endif
+                                                                       /*}}}*/ 
+// PM::DoInstall - Does the installation                               /*{{{*/
+// ---------------------------------------------------------------------
+/* compat */
+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
+pkgPackageManager::OrderResult 
+pkgPackageManager::DoInstall(int statusFd)
+{
+    APT::Progress::PackageManager *progress = new
+       APT::Progress::PackageManagerProgressFd(statusFd);
+    OrderResult res = DoInstall(progress);
+    delete progress;
+    return res;
+ }
+#else
+pkgPackageManager::OrderResult pkgPackageManager::DoInstall(int statusFd)
+{
+   if(DoInstallPreFork() == Failed)
+      return Failed;
 
+   return DoInstallPostFork(statusFd);
+}
+#endif
+                                                                       /*}}}*/ 
 // PM::DoInstall - Does the installation                               /*{{{*/
 // ---------------------------------------------------------------------
 /* This uses the filenames in FileNames and the information in the
    DepCache to perform the installation of packages.*/
-pkgPackageManager::OrderResult pkgPackageManager::DoInstall(int statusFd)
+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
+pkgPackageManager::OrderResult 
+pkgPackageManager::DoInstall(APT::Progress::PackageManager *progress)
 {
    if(DoInstallPreFork() == Failed)
       return Failed;
    
-   return DoInstallPostFork(statusFd);
+   return DoInstallPostFork(progress);
 }
+#endif
                                                                        /*}}}*/