]> git.saurik.com Git - apt.git/blobdiff - apt-pkg/packagemanager.cc
Merge branch 'debian/sid' into debian/experimental
[apt.git] / apt-pkg / packagemanager.cc
index 48c380be38b4519c0d75e83192e21dd8030d0468..d9df28ba3132b2c45481c5e29cc9cf11beaec3cb 100644 (file)
@@ -13,7 +13,7 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
-#include<config.h>
+#include <config.h>
 
 #include <apt-pkg/packagemanager.h>
 #include <apt-pkg/orderlist.h>
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/sptr.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/install-progress.h>
 
-#include <apti18n.h>
+#include <stddef.h>
+#include <list>
+#include <string>
 #include <iostream>
-#include <fcntl.h>
+
+#include <apti18n.h>
                                                                        /*}}}*/
 using namespace std;
 
@@ -152,7 +160,7 @@ void pkgPackageManager::ImmediateAdd(PkgIterator I, bool UseInstallVer, unsigned
         if(!List->IsFlag(D.TargetPkg(), pkgOrderList::Immediate))
         {
            if(Debug)
-              clog << OutputInDepth(Depth) << "ImmediateAdd(): Adding Immediate flag to " << D.TargetPkg() << " cause of " << D.DepType() << " " << I.Name() << endl;
+              clog << OutputInDepth(Depth) << "ImmediateAdd(): Adding Immediate flag to " << D.TargetPkg() << " cause of " << D.DepType() << " " << I.FullName() << endl;
            List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
            ImmediateAdd(D.TargetPkg(), UseInstallVer, Depth + 1);
         }
@@ -187,7 +195,7 @@ bool pkgPackageManager::CreateOrderList()
          NoImmConfigure == false) || ImmConfigureAll)
       {
         if(Debug && !ImmConfigureAll)
-           clog << "CreateOrderList(): Adding Immediate flag for " << I.Name() << endl;
+           clog << "CreateOrderList(): Adding Immediate flag for " << I.FullName() << endl;
         List->Flag(I,pkgOrderList::Immediate);
         
         if (!ImmConfigureAll) {
@@ -215,7 +223,7 @@ 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] */
@@ -243,20 +251,20 @@ 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;
       
       if (Cache.VS().CheckDep(Ver,D->CompareOp,D.TargetVer()) == false)
         continue;
 
-      if (EarlyRemove(D.ParentPkg()) == false)
+      if (EarlyRemove(D.ParentPkg(), &D) == false)
         return _error->Error("Reverse conflicts early remove for package '%s' failed",
-                             Pkg.Name());
+                             Pkg.FullName().c_str());
    }
    return true;
 }
@@ -294,9 +302,9 @@ bool pkgPackageManager::ConfigureAll()
       if (ConfigurePkgs == true && SmartConfigure(Pkg, 0) == false) {
          if (ImmConfigureAll)
             _error->Error(_("Could not perform immediate configuration on '%s'. "
-                       "Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.Name(),1);
+                       "Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.FullName().c_str(),1);
          else
-            _error->Error("Internal error, packages left unconfigured. %s",Pkg.Name());
+            _error->Error("Internal error, packages left unconfigured. %s",Pkg.FullName().c_str());
         return false;
       }
       
@@ -306,143 +314,202 @@ bool pkgPackageManager::ConfigureAll()
    return true;
 }
                                                                        /*}}}*/
+// PM::NonLoopingSmart - helper to avoid loops while calling Smart methods /*{{{*/
+// -----------------------------------------------------------------------
+/* ensures that a loop of the form A depends B, B depends A (and similar)
+   is not leading us down into infinite recursion segfault land */
+bool pkgPackageManager::NonLoopingSmart(SmartAction const action, pkgCache::PkgIterator &Pkg,
+      pkgCache::PkgIterator DepPkg, int const Depth, bool const PkgLoop,
+      bool * const Bad, bool * const Changed)
+{
+   if (PkgLoop == false)
+      List->Flag(Pkg,pkgOrderList::Loop);
+   bool success = false;
+   switch(action)
+   {
+      case UNPACK_IMMEDIATE: success = SmartUnPack(DepPkg, true, Depth + 1); break;
+      case UNPACK: success = SmartUnPack(DepPkg, false, Depth + 1); break;
+      case CONFIGURE: success = SmartConfigure(DepPkg, Depth + 1); break;
+   }
+   if (PkgLoop == false)
+      List->RmFlag(Pkg,pkgOrderList::Loop);
+
+   if (success == false)
+      return false;
+
+   if (Bad != NULL)
+      *Bad = false;
+   if (Changed != NULL && List->IsFlag(DepPkg,pkgOrderList::Loop) == false)
+      *Changed = true;
+   return true;
+}
+                                                                       /*}}}*/
 // PM::SmartConfigure - Perform immediate configuration of the pkg     /*{{{*/
 // ---------------------------------------------------------------------
 /* This function tries to put the system in a state where Pkg can be configured.
-   This involves checking each of Pkg's dependanies and unpacking and 
-   configuring packages where needed. 
-   
-   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
-   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*/
+   This involves checking each of Pkg's dependencies and unpacking and
+   configuring packages where needed. */
 bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
 {
    // If this is true, only check and correct and dependencies without the Loop flag
-   bool PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);
+   bool const PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);
 
    if (Debug) {
       VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
-      clog << OutputInDepth(Depth) << "SmartConfigure " << Pkg.Name() << " (" << InstallVer.VerStr() << ")";
+      clog << OutputInDepth(Depth) << "SmartConfigure " << Pkg.FullName() << " (" << InstallVer.VerStr() << ")";
       if (PkgLoop)
         clog << " (Only Correct Dependencies)";
       clog << endl;
    }
 
    VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
-      
-   /* Because of the ordered list, most dependencies should be unpacked, 
-      however if there is a loop (A depends on B, B depends on A) this will not 
+
+   /* Because of the ordered list, most dependencies should be unpacked,
+      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;
-   for (DepIterator D = instVer.DependsList();
-       D.end() == false; )
+   bool Bad = false, Changed = false;
+   const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);
+   unsigned int i=0;
+   std::list<DepIterator> needConfigure;
+   do
    {
-      // Compute a single dependency element (glob or)
-      pkgCache::DepIterator Start;
-      pkgCache::DepIterator End;
-      D.GlobOr(Start,End);
-      
-      if (End->Type == pkgCache::Dep::Depends) 
-          Bad = true;
-
-      // Check for dependanices that have not been unpacked, probably due to loops.
-      while (End->Type == pkgCache::Dep::Depends) {
-         PkgIterator DepPkg;
-         VerIterator InstallVer;
-         SPtrArray<Version *> VList = Start.AllTargets();
-         
-         // Check through each version of each package that could satisfy this dependancy
-        for (Version **I = VList; *I != 0; I++) {
-           VerIterator Ver(Cache,*I);
-           DepPkg = Ver.ParentPkg();
-           InstallVer = VerIterator(Cache,Cache[DepPkg].InstallVer);
-
-           // Check if the current version of the package is avalible and will satisfy this dependancy
-           if (DepPkg.CurrentVer() == Ver && List->IsNow(DepPkg) == true && 
-               !List->IsFlag(DepPkg,pkgOrderList::Removed) && DepPkg.State() == PkgIterator::NeedsNothing)
+      Changed = false;
+      for (DepIterator D = instVer.DependsList(); D.end() == false; )
+      {
+        // Compute a single dependency element (glob or)
+        pkgCache::DepIterator Start, End;
+        D.GlobOr(Start,End);
+
+        if (End->Type != pkgCache::Dep::Depends)
+           continue;
+        Bad = true;
+
+        // Check for dependencies that have not been unpacked, probably due to loops.
+        for (DepIterator Cur = Start; true; ++Cur)
+        {
+           SPtrArray<Version *> VList = Cur.AllTargets();
+
+           for (Version **I = VList; *I != 0; ++I)
            {
-              Bad = false;
-              break;
-           }
-           
-           // Check if the version that is going to be installed will satisfy the dependancy
-           if (Cache[DepPkg].InstallVer == *I) {
-              if (List->IsFlag(DepPkg,pkgOrderList::UnPacked)) {
-                 if (List->IsFlag(DepPkg,pkgOrderList::Loop) && PkgLoop) {
-                   // This dependancy has already been dealt with by another SmartConfigure on Pkg
-                   Bad = false;
-                   break;
-                  } else if (List->IsFlag(Pkg,pkgOrderList::Loop)) {
-                   /* 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 */
-                    Bad = !SmartConfigure(DepPkg, Depth + 1);
-                 } else {
-                   /* 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 */
-                   List->Flag(Pkg,pkgOrderList::Loop);
-                   Bad = !SmartConfigure(DepPkg, Depth + 1);
-                   List->RmFlag(Pkg,pkgOrderList::Loop);
-                 }
-                 // If SmartConfigure was succesfull, Bad is false, so break
-                 if (!Bad) break;
-              } else if (List->IsFlag(DepPkg,pkgOrderList::Configured)) {
-                 Bad = false;
-                 break;
+              VerIterator Ver(Cache,*I);
+              PkgIterator DepPkg = Ver.ParentPkg();
+
+              // Check if the current version of the package is available and will satisfy this dependency
+              if (DepPkg.CurrentVer() == Ver && List->IsNow(DepPkg) == true &&
+                  List->IsFlag(DepPkg,pkgOrderList::Removed) == false &&
+                  DepPkg.State() == PkgIterator::NeedsNothing)
+              {
+                 Bad = false;
+                 break;
               }
-           }
-        }
-        
-        /* If the dependany is still not satisfied, try, if possible, unpacking a package to satisfy it */
-        if (InstallVer != 0 && Bad) {
-           if (List->IsNow(DepPkg)) {
-              Bad = false;
-              if (List->IsFlag(Pkg,pkgOrderList::Loop))
+
+              // Check if the version that is going to be installed will satisfy the dependency
+              if (Cache[DepPkg].InstallVer != *I || List->IsNow(DepPkg) == false)
+                 continue;
+
+              if (PkgLoop == true)
               {
                  if (Debug)
                     std::clog << OutputInDepth(Depth) << "Package " << Pkg << " loops in SmartConfigure" << std::endl;
+                 Bad = false;
               }
               else
               {
-                 List->Flag(Pkg,pkgOrderList::Loop);
                  if (Debug)
-                    clog << OutputInDepth(Depth) << "Unpacking " << DepPkg.Name() << " to avoid loop" << endl;
-                 SmartUnPack(DepPkg, true, Depth + 1);
-                 List->RmFlag(Pkg,pkgOrderList::Loop);
+                    clog << OutputInDepth(Depth) << "Unpacking " << DepPkg.FullName() << " to avoid loop " << Cur << endl;
+                 if (NonLoopingSmart(UNPACK_IMMEDIATE, Pkg, DepPkg, Depth, PkgLoop, &Bad, &Changed) == false)
+                    return false;
               }
+              break;
            }
+
+           if (Cur == End || Bad == false)
+              break;
         }
-        
-        if (Start==End) {
-           if (Bad && Debug && List->IsFlag(DepPkg,pkgOrderList::Loop) == false)
-                 std::clog << OutputInDepth(Depth) << "Could not satisfy dependencies for " << Pkg.Name() << std::endl;
-           break;
-        } else {
-            Start++;
+
+        if (Bad == false)
+           continue;
+
+        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();
+
+           for (Version **I = VList; *I != 0; ++I)
+           {
+              VerIterator Ver(Cache,*I);
+              PkgIterator DepPkg = Ver.ParentPkg();
+
+              // Check if the version that is going to be installed will satisfy the dependency
+              if (Cache[DepPkg].InstallVer != *I)
+                 continue;
+
+              if (List->IsFlag(DepPkg,pkgOrderList::UnPacked))
+              {
+                 if (List->IsFlag(DepPkg,pkgOrderList::Loop) && PkgLoop)
+                 {
+                   // This dependency has already been dealt with by another SmartConfigure on Pkg
+                   Bad = false;
+                   break;
+                 }
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "Configure already unpacked " << DepPkg << std::endl;
+                 if (NonLoopingSmart(CONFIGURE, Pkg, DepPkg, Depth, PkgLoop, &Bad, &Changed) == false)
+                    return false;
+                 break;
+
+              }
+              else if (List->IsFlag(DepPkg,pkgOrderList::Configured))
+              {
+                 Bad = false;
+                 break;
+              }
+           }
+           if (Cur == End || Bad == false)
+              break;
          }
+
+
+        if (Bad == true && Changed == false && Debug == true)
+           std::clog << OutputInDepth(Depth) << "Could not satisfy " << *D << std::endl;
       }
-   }
-   
-   if (Bad) {
-      if (Debug)
-         _error->Warning(_("Could not configure '%s'. "),Pkg.Name());
-      return false;
-   }
-   
+      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 == true)
+      return _error->Error(_("Could not configure '%s'. "),Pkg.FullName().c_str());
+
    if (PkgLoop) return true;
 
    static std::string const conf = _config->Find("PackageManager::Configure","all");
    static bool const ConfigurePkgs = (conf == "all" || conf == "smart");
 
-   if (List->IsFlag(Pkg,pkgOrderList::Configured)) 
-      return _error->Error("Internal configure error on '%s'.", Pkg.Name());
+   if (List->IsFlag(Pkg,pkgOrderList::Configured))
+      return _error->Error("Internal configure error on '%s'.", Pkg.FullName().c_str());
 
    if (ConfigurePkgs == true && Configure(Pkg) == false)
       return false;
@@ -454,15 +521,17 @@ 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;
-        SmartConfigure(P, (Depth +1));
+        if (SmartConfigure(P, (Depth +1)) == false)
+           return false;
       }
 
    // Sanity Check
    if (List->IsFlag(Pkg,pkgOrderList::Configured) == false)
-      return _error->Error(_("Could not configure '%s'. "),Pkg.Name());
+      return _error->Error(_("Could not configure '%s'. "),Pkg.FullName().c_str());
 
    return true;
 }
@@ -471,29 +540,37 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
 // ---------------------------------------------------------------------
 /* This is called to deal with conflicts arising from unpacking */
 bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
+{
+   return EarlyRemove(Pkg, NULL);
+}
+bool pkgPackageManager::EarlyRemove(PkgIterator Pkg, DepIterator const * const Dep)
 {
    if (List->IsNow(Pkg) == false)
       return true;
-        
+
    // Already removed it
    if (List->IsFlag(Pkg,pkgOrderList::Removed) == true)
       return true;
-   
+
    // Woops, it will not be re-installed!
    if (List->IsFlag(Pkg,pkgOrderList::InList) == false)
       return false;
 
+   // these breaks on M-A:same packages can be dealt with. They 'loop' by design
+   if (Dep != NULL && (*Dep)->Type == pkgCache::Dep::DpkgBreaks && Dep->IsMultiArchImplicit() == true)
+      return true;
+
    // Essential packages get special treatment
    bool IsEssential = false;
    if ((Pkg->Flags & pkgCache::Flag::Essential) != 0 ||
        (Pkg->Flags & pkgCache::Flag::Important) != 0)
       IsEssential = true;
 
-   /* Check for packages that are the dependents of essential packages and 
+   /* Check for packages that are the dependents of essential packages and
       promote them too */
    if (Pkg->CurrentVer != 0)
    {
-      for (DepIterator D = Pkg.RevDependsList(); D.end() == false &&
+      for (pkgCache::DepIterator D = Pkg.RevDependsList(); D.end() == false &&
           IsEssential == false; ++D)
         if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
            if ((D.ParentPkg()->Flags & pkgCache::Flag::Essential) != 0 ||
@@ -508,13 +585,16 @@ bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
                                "removing the essential package %s due to a "
                                "Conflicts/Pre-Depends loop. This is often bad, "
                                "but if you really want to do it, activate the "
-                               "APT::Force-LoopBreak option."),Pkg.Name());
+                               "APT::Force-LoopBreak option."),Pkg.FullName().c_str());
    }
-   
+   // dpkg will auto-deconfigure it, no need for the big remove hammer
+   else if (Dep != NULL && (*Dep)->Type == pkgCache::Dep::DpkgBreaks)
+      return true;
+
    bool Res = SmartRemove(Pkg);
    if (Cache[Pkg].Delete() == false)
       List->Flag(Pkg,pkgOrderList::Removed,pkgOrderList::States);
-   
+
    return Res;
 }
                                                                        /*}}}*/
@@ -533,7 +613,7 @@ 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)
 {
@@ -544,7 +624,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
    bool PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);
 
    if (Debug) {
-      clog << OutputInDepth(Depth) << "SmartUnPack " << Pkg.Name();
+      clog << OutputInDepth(Depth) << "SmartUnPack " << Pkg.FullName();
       VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
       if (Pkg.CurrentVer() == 0)
         clog << " (install version " << InstallVer.VerStr() << ")";
@@ -552,214 +632,222 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
         clog << " (replace version " << Pkg.CurrentVer().VerStr() << " with " << InstallVer.VerStr() << ")";
       if (PkgLoop)
         clog << " (Only Perform PreUnpack Checks)";
+      if (Immediate)
+        clog << " immediately";
       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 
+   /* PreUnpack Checks: This loop checks and attempts to rectify any problems that would prevent the package being unpacked.
+      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 SomethingBad = false, Changed = false;
+   bool couldBeTemporaryRemoved = Depth != 0 && List->IsFlag(Pkg,pkgOrderList::Removed) == 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.Name() << 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.Name() << 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.Name() << 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.Name() << 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 DepPkg = 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().Name(),Pkg.Name());
-           ++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))
-           { 
-              clog << OutputInDepth(Depth) << Pkg.Name() << " conflicts with " << ConflictPkg.Name() << 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)
-                        clog << OutputInDepth(Depth) << OutputInDepth(Depth) << "Unpacking " << ConflictPkg.Name() << " 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.Name());
-                  }
-              } else {
-                 if (!List->IsFlag(ConflictPkg,pkgOrderList::Removed)) {
-                     if (Debug)
-                         clog << OutputInDepth(Depth) << "Because of conficts knot, removing " << ConflictPkg.Name() << " to conflict violation" << endl;
-                     if (EarlyRemove(ConflictPkg) == false)
-                          return _error->Error("Internal Error, Could not early remove %s",ConflictPkg.Name());
-                 }
+                 // Not the install version
+                 if (Cache[DepPkg].InstallVer != *I ||
+                     (Cache[DepPkg].Keep() == true && DepPkg.State() == PkgIterator::NeedsNothing))
+                    continue;
+
+                 if (List->IsFlag(DepPkg,pkgOrderList::Configured))
+                 {
+                    Bad = false;
+                    break;
+                 }
+
+                 // check if it needs unpack or if if configure is enough
+                 if (List->IsFlag(DepPkg,pkgOrderList::UnPacked) == false)
+                 {
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Trying to SmartUnpack " << DepPkg.FullName() << endl;
+                    if (NonLoopingSmart(UNPACK_IMMEDIATE, Pkg, DepPkg, Depth, PkgLoop, &Bad, &Changed) == false)
+                       return false;
+                 }
+                 else
+                 {
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Trying to SmartConfigure " << DepPkg.FullName() << endl;
+                    if (NonLoopingSmart(CONFIGURE, Pkg, DepPkg, Depth, PkgLoop, &Bad, &Changed) == false)
+                       return false;
+                 }
+                 break;
               }
            }
+
+           if (Bad == true)
+              SomethingBad = true;
         }
-      }
-      
-      // 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 ||
+                 End->Type == pkgCache::Dep::DpkgBreaks)
         {
-           VerIterator Ver(Cache,*I);
-           PkgIterator BrokenPkg = Ver.ParentPkg();
-           if (BrokenPkg.CurrentVer() != Ver)
+           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();
+              if (ConflictPkg.CurrentVer() != Ver)
+              {
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "Ignore not-installed version " << Ver.VerStr() << " of " << ConflictPkg.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 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)
-                 {
-                    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->CurrentVer == 0 || P != Pkg || (P.CurrentVer() != V && Cache[P].InstallVer != V))
-                          continue;
-                       circle = true;
-                       break;
-                    }
-                    if (circle == true)
-                       break;
-                 }
-                 if (circle == true)
+              if (List->IsNow(ConflictPkg) == false)
+              {
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "Ignore already dealt-with version " << Ver.VerStr() << " of " << ConflictPkg.FullName() << " for " << End << std::endl;
+                 continue;
+              }
+
+              if (List->IsFlag(ConflictPkg,pkgOrderList::Removed) == true)
+              {
+                 if (Debug)
+                    clog << OutputInDepth(Depth) << "Ignoring " << End << " as " << ConflictPkg.FullName() << "was temporarily removed" << endl;
+                 continue;
+              }
+
+              if (List->IsFlag(ConflictPkg,pkgOrderList::Loop) && PkgLoop)
+              {
+                 if (End->Type == pkgCache::Dep::DpkgBreaks && End.IsMultiArchImplicit() == true)
                  {
                     if (Debug)
-                       clog << OutputInDepth(Depth) << "  Avoiding " << End << " avoided as " << BrokenPkg.FullName() << " has a pre-depends on " << Pkg.FullName() << std::endl;
+                       clog << OutputInDepth(Depth) << "Because dependency is MultiArchImplicit we ignored looping on: " << ConflictPkg << endl;
                     continue;
                  }
-                 else
+                 if (Debug)
+                 {
+                    if (End->Type == pkgCache::Dep::DpkgBreaks)
+                       clog << OutputInDepth(Depth) << "Because of breaks knot, deconfigure " << ConflictPkg.FullName() << " temporarily" << endl;
+                    else
+                       clog << OutputInDepth(Depth) << "Because of conflict knot, removing " << ConflictPkg.FullName() << " temporarily" << endl;
+                 }
+                 if (EarlyRemove(ConflictPkg, &End) == false)
+                    return _error->Error("Internal Error, Could not early remove %s (2)",ConflictPkg.FullName().c_str());
+                 SomethingBad = true;
+                 continue;
+              }
+
+              if (Cache[ConflictPkg].Delete() == false)
+              {
+                 if (Debug)
+                 {
+                    clog << OutputInDepth(Depth) << "Unpacking " << ConflictPkg.FullName() << " to avoid " << End;
+                    if (PkgLoop == true)
+                       clog << " (Looping)";
+                    clog << std::endl;
+                 }
+                 // we would like to avoid temporary removals and all that at best via a simple unpack
+                 _error->PushToStack();
+                 if (NonLoopingSmart(UNPACK, Pkg, ConflictPkg, Depth, PkgLoop, NULL, &Changed) == false)
                  {
+                    // but if it fails ignore this failure and look for alternative ways of solving
                     if (Debug)
                     {
-                       clog << OutputInDepth(Depth) << "  Unpacking " << BrokenPkg.FullName() << " to avoid " << End;
-                       if (PkgLoop == true)
-                          clog << " (Looping)";
-                       clog << std::endl;
+                       clog << OutputInDepth(Depth) << "Avoidance unpack of " << ConflictPkg.FullName() << " failed for " << End << std::endl;
+                       _error->DumpErrors(std::clog);
+                    }
+                    _error->RevertToStack();
+                    // ignorance can only happen if a) one of the offenders is already gone
+                    if (List->IsFlag(ConflictPkg,pkgOrderList::Removed) == true)
+                    {
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << "But " << ConflictPkg.FullName() << " was temporarily removed in the meantime to satisfy " << End << endl;
+                    }
+                    else if (List->IsFlag(Pkg,pkgOrderList::Removed) == true)
+                    {
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << "But " << Pkg.FullName() << " was temporarily removed in the meantime to satisfy " << End << endl;
+                    }
+                    // or b) we can make one go (removal or dpkg auto-deconfigure)
+                    else
+                    {
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << "So temprorary remove/deconfigure " << ConflictPkg.FullName() << " to satisfy " << End << endl;
+                       if (EarlyRemove(ConflictPkg, &End) == false)
+                          return _error->Error("Internal Error, Could not early remove %s (2)",ConflictPkg.FullName().c_str());
                     }
-                    if (PkgLoop == false)
-                       List->Flag(Pkg,pkgOrderList::Loop);
-                    SmartUnPack(BrokenPkg, false, Depth + 1);
-                    if (PkgLoop == false)
-                       List->RmFlag(Pkg,pkgOrderList::Loop);
                  }
+                 else
+                    _error->MergeWithStack();
               }
-           } else {
-              // Check if a package needs to be removed
-              if (Cache[BrokenPkg].Delete() == true && !List->IsFlag(BrokenPkg,pkgOrderList::Configured))
+              else
               {
                  if (Debug)
-                    clog << OutputInDepth(Depth) << "  Removing " << BrokenPkg.Name() << " to avoid " << End << endl;
-                 SmartRemove(BrokenPkg);
+                    clog << OutputInDepth(Depth) << "Removing " << ConflictPkg.FullName() << " now to avoid " << End << endl;
+                 // no earlyremove() here as user has already agreed to the permanent removal
+                 if (SmartRemove(Pkg) == false)
+                    return _error->Error("Internal Error, Could not early remove %s (1)",ConflictPkg.FullName().c_str());
               }
            }
         }
       }
+      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);
+
+   if (SomethingBad == true)
+      return _error->Error("Couldn't configure %s, probably a dependency cycle.", Pkg.FullName().c_str());
+
+   if (couldBeTemporaryRemoved == true && List->IsFlag(Pkg,pkgOrderList::Removed) == true)
+   {
+      if (Debug)
+        std::clog << OutputInDepth(Depth) << "Prevent unpack as " << Pkg << " is currently temporarily removed" << std::endl;
+      return true;
    }
-   
+
    // Check for reverse conflicts.
    if (CheckRConflicts(Pkg,Pkg.RevDependsList(),
                   instVer.VerStr()) == false)
@@ -782,7 +870,10 @@ 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))
@@ -800,6 +891,7 @@ 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;
@@ -808,14 +900,16 @@ 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) {
       // Perform immedate configuration of the package. 
          if (SmartConfigure(Pkg, Depth + 1) == false)
-            _error->Warning(_("Could not perform immediate configuration on '%s'. "
-               "Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.Name(),2);
+            _error->Error(_("Could not perform immediate configuration on '%s'. "
+               "Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.FullName().c_str(),2);
    }
    
    return true;
@@ -850,25 +944,18 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
    for (pkgOrderList::iterator I = List->begin(); I != List->end(); ++I)
    {
       PkgIterator Pkg(Cache,*I);
-      
+
       if (List->IsNow(Pkg) == false)
       {
-         if (!List->IsFlag(Pkg,pkgOrderList::Configured) && !NoImmConfigure) {
-            if (SmartConfigure(Pkg, 0) == false && Debug)
-               _error->Warning("Internal Error, Could not configure %s",Pkg.Name());
-            // FIXME: The above warning message might need changing
-         } else {
-           if (Debug == true)
-              clog << "Skipping already done " << Pkg.Name() << endl;
-        }
+        if (Debug == true)
+           clog << "Skipping already done " << Pkg.FullName() << endl;
         continue;
-        
       }
-      
+
       if (List->IsMissing(Pkg) == true)
       {
         if (Debug == true)
-           clog << "Sequence completed at " << Pkg.Name() << endl;
+           clog << "Sequence completed at " << Pkg.FullName() << endl;
         if (DoneSomething == false)
         {
            _error->Error("Internal Error, ordering was unable to handle the media swap");
@@ -882,7 +969,7 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
          Pkg.State() == pkgCache::PkgIterator::NeedsNothing &&
          (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)
       {
-        _error->Error("Internal Error, trying to manipulate a kept package (%s)",Pkg.Name());
+        _error->Error("Internal Error, trying to manipulate a kept package (%s)",Pkg.FullName().c_str());
         return Failed;
       }
       
@@ -898,7 +985,7 @@ 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; 
@@ -915,39 +1002,85 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
       if (List->IsFlag(*I,pkgOrderList::Configured) == false)
       {
         _error->Error("Internal error, packages left unconfigured. %s",
-                      PkgIterator(Cache,*I).Name());
+                      PkgIterator(Cache,*I).FullName().c_str());
         return Failed;
       }
    }
         
    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
                                                                        /*}}}*/