releasing version 0.8.16~exp13
[ntk/apt.git] / apt-pkg / packagemanager.cc
index 7a0f11d..382ee43 100644 (file)
@@ -13,6 +13,8 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
+#include<config.h>
+
 #include <apt-pkg/packagemanager.h>
 #include <apt-pkg/orderlist.h>
 #include <apt-pkg/depcache.h>
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/sptr.h>
-    
-#include <apti18n.h>    
+
+#include <apti18n.h>
 #include <iostream>
-#include <fcntl.h> 
+#include <fcntl.h>
                                                                        /*}}}*/
 using namespace std;
 
@@ -34,11 +36,13 @@ bool pkgPackageManager::SigINTStop = false;
 // PM::PackageManager - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-pkgPackageManager::pkgPackageManager(pkgDepCache *pCache) : Cache(*pCache)
+pkgPackageManager::pkgPackageManager(pkgDepCache *pCache) : Cache(*pCache),
+                                                           List(NULL), Res(Incomplete)
 {
    FileNames = new string[Cache.Head().PackageCount];
-   List = 0;
    Debug = _config->FindB("Debug::pkgPackageManager",false);
+   NoImmConfigure = !_config->FindB("APT::Immediate-Configure",true);
+   ImmConfigureAll = _config->FindB("APT::Immediate-Configure-All",false);
 }
                                                                        /*}}}*/
 // PM::PackageManager - Destructor                                     /*{{{*/
@@ -65,7 +69,7 @@ bool pkgPackageManager::GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
    if (ordering == false)
       return _error->Error("Internal ordering error");
 
-   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
+   for (pkgOrderList::iterator I = List->begin(); I != List->end(); ++I)
    {
       PkgIterator Pkg(Cache,*I);
       FileNames[Pkg->ID] = string();
@@ -101,7 +105,7 @@ bool pkgPackageManager::FixMissing()
    List->SetFileList(FileNames);
 
    bool Bad = false;
-   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       if (List->IsMissing(I) == false)
         continue;
@@ -142,7 +146,7 @@ void pkgPackageManager::ImmediateAdd(PkgIterator I, bool UseInstallVer, unsigned
       D = I.CurrentVer().DependsList(); 
    }
 
-   for ( /* nothing */  ; D.end() == false; D++)
+   for ( /* nothing */  ; D.end() == false; ++D)
       if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
       {
         if(!List->IsFlag(D.TargetPkg(), pkgOrderList::Immediate))
@@ -167,23 +171,19 @@ bool pkgPackageManager::CreateOrderList()
    
    delete List;
    List = new pkgOrderList(&Cache);
-   
-   NoImmConfigure = !_config->FindB("APT::Immediate-Configure",true);
-   ImmConfigureAll = _config->FindB("APT::Immediate-Configure-All",false);
-   
+
    if (Debug && ImmConfigureAll) 
       clog << "CreateOrderList(): Adding Immediate flag for all packages because of APT::Immediate-Configure-All" << endl;
    
    // Generate the list of affected packages and sort it
-   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)
    {
       // Ignore no-version packages
       if (I->VersionList == 0)
         continue;
       
       // Mark the package and its dependends for immediate configuration
-      if ((((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential ||
-          (I->Flags & pkgCache::Flag::Important) == pkgCache::Flag::Important) &&
+      if ((((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential) &&
          NoImmConfigure == false) || ImmConfigureAll)
       {
         if(Debug && !ImmConfigureAll)
@@ -237,7 +237,7 @@ bool pkgPackageManager::DepAlwaysTrue(DepIterator D)
 bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
                                        const char *Ver)
 {
-   for (;D.end() == false; D++)
+   for (;D.end() == false; ++D)
    {
       if (D->Type != pkgCache::Dep::Conflicts &&
          D->Type != pkgCache::Dep::Obsoletes)
@@ -248,7 +248,7 @@ bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
         continue;
       
       // Ignore self conflicts, ignore conflicts from irrelevent versions
-      if (D.ParentPkg() == Pkg || D.ParentVer() != D.ParentPkg().CurrentVer())
+      if (D.IsIgnorable(Pkg) || D.ParentVer() != D.ParentPkg().CurrentVer())
         continue;
       
       if (Cache.VS().CheckDep(Ver,D->CompareOp,D.TargetVer()) == false)
@@ -271,7 +271,7 @@ bool pkgPackageManager::ConfigureAll()
    pkgOrderList OList(&Cache);
    
    // Populate the order list
-   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
+   for (pkgOrderList::iterator I = List->begin(); I != List->end(); ++I)
       if (List->IsFlag(pkgCache::PkgIterator(Cache,*I),
                       pkgOrderList::UnPacked) == true)
         OList.push_back(*I);
@@ -283,7 +283,7 @@ bool pkgPackageManager::ConfigureAll()
    bool const ConfigurePkgs = (conf == "all");
 
    // Perform the configuring
-   for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
+   for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); ++I)
    {
       PkgIterator Pkg(Cache,*I);
       
@@ -291,7 +291,7 @@ bool pkgPackageManager::ConfigureAll()
          calls its self */ 
       if (List->IsFlag(Pkg,pkgOrderList::Configured)) continue;
 
-      if (ConfigurePkgs == true && SmartConfigure(Pkg) == false) {
+      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);
@@ -318,21 +318,24 @@ bool pkgPackageManager::ConfigureAll()
    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*/
-bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
+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);
+
    if (Debug) {
       VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
-      clog << "SmartConfigure " << Pkg.Name() << InstallVer.VerStr() << endl;
+      clog << OutputInDepth(Depth) << "SmartConfigure " << Pkg.Name() << " (" << InstallVer.VerStr() << ")";
+      if (PkgLoop)
+        clog << " (Only Correct Dependencies)";
+      clog << endl;
    }
 
-   // If this is true, only check and correct and dependancies without the Loop flag
-   bool PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);
-
    VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
       
-   /* Because of the ordered list, most dependancies should be unpacked, 
+   /* 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 dependancies before configuring. */
+      be the case, so check for dependencies before configuring. */
    bool Bad = false;
    for (DepIterator D = instVer.DependsList();
        D.end() == false; )
@@ -368,18 +371,27 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
            // 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 (PkgLoop && List->IsFlag(DepPkg,pkgOrderList::Loop)) {
+                 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);
                  }
-                 /* 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);
                  // If SmartConfigure was succesfull, Bad is false, so break
-                 Bad = !SmartConfigure(DepPkg);
-                 List->RmFlag(Pkg,pkgOrderList::Loop);
                  if (!Bad) break;
               } else if (List->IsFlag(DepPkg,pkgOrderList::Configured)) {
                  Bad = false;
@@ -390,22 +402,27 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
         
         /* If the dependany is still not satisfied, try, if possible, unpacking a package to satisfy it */
         if (InstallVer != 0 && Bad) {
-           Bad = false;
-           if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
-              List->Flag(Pkg,pkgOrderList::Loop);
-              if (Debug) 
-                 cout << "  Unpacking " << DepPkg.Name() << " to avoid loop" << endl;
-              SmartUnPack(DepPkg, false);
-              List->RmFlag(Pkg,pkgOrderList::Loop);
+           if (List->IsNow(DepPkg)) {
+              Bad = false;
+              if (List->IsFlag(Pkg,pkgOrderList::Loop))
+              {
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "Package " << Pkg << " loops in SmartConfigure" << std::endl;
+              }
+              else
+              {
+                 List->Flag(Pkg,pkgOrderList::Loop);
+                 if (Debug)
+                    cout << OutputInDepth(Depth) << "Unpacking " << DepPkg.Name() << " to avoid loop" << endl;
+                 SmartUnPack(DepPkg, true, Depth + 1);
+                 List->RmFlag(Pkg,pkgOrderList::Loop);
+              }
            }
         }
         
         if (Start==End) {
-           if (Bad && Debug) {
-              if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
-                  _error->Warning("Could not satisfy dependancies for %s",Pkg.Name());
-               } 
-           }
+           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++;
@@ -425,14 +442,14 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
    static bool const ConfigurePkgs = (conf == "all" || conf == "smart");
 
    if (List->IsFlag(Pkg,pkgOrderList::Configured)) 
-      return _error->Error("Internal configure error on '%s'. ",Pkg.Name(),1);
+      return _error->Error("Internal configure error on '%s'.", Pkg.Name());
 
    if (ConfigurePkgs == true && Configure(Pkg) == false)
       return false;
-      
+
    List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
 
-   if (Cache[Pkg].InstVerIter(Cache)->MultiArch == pkgCache::Version::Same)
+   if ((Cache[Pkg].InstVerIter(Cache)->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same)
       for (PkgIterator P = Pkg.Group().PackageList();
           P.end() == false; P = Pkg.Group().NextPkg(P))
       {
@@ -440,7 +457,7 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
             Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
              (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
            continue;
-        SmartConfigure(P);
+        SmartConfigure(P, (Depth +1));
       }
 
    // Sanity Check
@@ -468,7 +485,8 @@ bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
 
    // Essential packages get special treatment
    bool IsEssential = false;
-   if ((Pkg->Flags & pkgCache::Flag::Essential) != 0)
+   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 
@@ -476,9 +494,10 @@ bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
    if (Pkg->CurrentVer != 0)
    {
       for (DepIterator D = Pkg.RevDependsList(); D.end() == false &&
-          IsEssential == false; D++)
+          IsEssential == false; ++D)
         if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
-           if ((D.ParentPkg()->Flags & pkgCache::Flag::Essential) != 0)
+           if ((D.ParentPkg()->Flags & pkgCache::Flag::Essential) != 0 ||
+               (D.ParentPkg()->Flags & pkgCache::Flag::Important) != 0)
               IsEssential = true;
    }
 
@@ -510,7 +529,6 @@ bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
    List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
 
    return Remove(Pkg,(Cache[Pkg].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge);
-   return true;
 }
                                                                        /*}}}*/
 // PM::SmartUnPack - Install helper                                    /*{{{*/
@@ -519,32 +537,24 @@ bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
    unpacked, or when it has been unpacked, if Immediate==true it configures it. */
 bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
 {
-   return SmartUnPack(Pkg, true);
+   return SmartUnPack(Pkg, true, 0);
 }
-bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
+bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int const Depth)
 {
+   bool PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);
+
    if (Debug) {
-      clog << "SmartUnPack " << Pkg.Name();
+      clog << OutputInDepth(Depth) << "SmartUnPack " << Pkg.Name();
       VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
       if (Pkg.CurrentVer() == 0)
-        cout << "(install version " << InstallVer.VerStr() << ")" << endl;
+        cout << " (install version " << InstallVer.VerStr() << ")";
       else
-        cout << "(replace version " << Pkg.CurrentVer().VerStr() << " with " << InstallVer.VerStr() << ")" << endl;
+        cout << " (replace version " << Pkg.CurrentVer().VerStr() << " with " << InstallVer.VerStr() << ")";
+      if (PkgLoop)
+        cout << " (Only Perform PreUnpack Checks)";
+      cout << endl;
    }
 
-   // Check if it is already unpacked
-   if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
-       Cache[Pkg].Keep() == true)
-   {
-      List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
-      if (Immediate == true &&
-         List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
-        if (SmartConfigure(Pkg) == false)
-           _error->Warning(_("Could not perform immediate configuration on already unpacked '%s'. "
-                       "Please see man 5 apt.conf under APT::Immediate-Configure for details."),Pkg.Name());
-      return true;
-   }
-   
    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.
@@ -564,7 +574,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
       while (End->Type == pkgCache::Dep::PreDepends)
       {
         if (Debug)
-           clog << "PreDepends order for " << Pkg.Name() << std::endl;
+           clog << OutputInDepth(Depth) << "PreDepends order for " << Pkg.Name() << std::endl;
 
         // Look for possible ok targets.
         SPtrArray<Version *> VList = Start.AllTargets();
@@ -580,7 +590,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
            {
               Bad = false;
               if (Debug)
-                 clog << "Found ok package " << Pkg.Name() << endl;
+                 clog << OutputInDepth(Depth) << "Found ok package " << Pkg.Name() << endl;
               continue;
            }
         }
@@ -601,10 +611,19 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
               continue;
            }
 
-           if (Debug)
-              clog << "Trying to SmartConfigure " << Pkg.Name() << endl;
-           Bad = !SmartConfigure(Pkg);
-        }
+            // 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);
+            }
+         }
 
         /* If this or element did not match then continue on to the
            next or element until a matching element is found */
@@ -615,7 +634,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
               return _error->Error("Couldn't configure pre-depend %s for %s, "
                                    "probably a dependency cycle.",
                                    End.TargetPkg().Name(),Pkg.Name());
-           Start++;
+           ++Start;
         }
         else 
            break;
@@ -636,15 +655,15 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
            // See if the current version is conflicting
            if (ConflictPkg.CurrentVer() == Ver && List->IsNow(ConflictPkg))
            { 
-              cout << Pkg.Name() << " conflicts with " << ConflictPkg.Name() << endl;
+              cout << 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)
-                        cout << "Unpacking " << ConflictPkg.Name() << " to prevent conflict" << endl;
+                        cout << OutputInDepth(Depth) << OutputInDepth(Depth) << "Unpacking " << ConflictPkg.Name() << " to prevent conflict" << endl;
                       List->Flag(Pkg,pkgOrderList::Loop);
-                     SmartUnPack(ConflictPkg,false);
+                     SmartUnPack(ConflictPkg,false, Depth + 1);
                      // Remove loop to allow it to be used later if needed
                      List->RmFlag(Pkg,pkgOrderList::Loop);
                   } else {
@@ -654,7 +673,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
               } else {
                  if (!List->IsFlag(ConflictPkg,pkgOrderList::Removed)) {
                      if (Debug)
-                         cout << "Because of conficts knot, removing " << ConflictPkg.Name() << " to conflict violation" << endl;
+                         cout << 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());
                  }
@@ -670,24 +689,72 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
         {
            VerIterator Ver(Cache,*I);
            PkgIterator BrokenPkg = Ver.ParentPkg();
-           VerIterator InstallVer(Cache,Cache[BrokenPkg].InstallVer);
-           
-           // Check if it needs to be unpacked
-           if (List->IsFlag(BrokenPkg,pkgOrderList::InList) && Cache[BrokenPkg].Delete() == false && 
-               !List->IsFlag(BrokenPkg,pkgOrderList::Loop) && List->IsNow(BrokenPkg)) {
-              List->Flag(Pkg,pkgOrderList::Loop);
-             // Found a break, so unpack the package
-             if (Debug) 
-                cout << "  Unpacking " << BrokenPkg.Name() << " to avoid break" << endl;
-                
-             SmartUnPack(BrokenPkg, false);
-             List->RmFlag(Pkg,pkgOrderList::Loop);
+           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 a package needs to be removed
-           if (Cache[BrokenPkg].Delete() == true && !List->IsFlag(BrokenPkg,pkgOrderList::Configured)) {
-             if (Debug) 
-                cout << "  Removing " << BrokenPkg.Name() << " to avoid break" << endl;
-             SmartRemove(BrokenPkg);
+
+           // 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 (Debug)
+                       cout << OutputInDepth(Depth) << "  Avoiding " << End << " avoided as " << BrokenPkg.FullName() << " has a pre-depends on " << Pkg.FullName() << std::endl;
+                    continue;
+                 }
+                 else
+                 {
+                    if (Debug)
+                    {
+                       cout << OutputInDepth(Depth) << "  Unpacking " << BrokenPkg.FullName() << " to avoid " << End;
+                       if (PkgLoop == true)
+                          cout << " (Looping)";
+                       cout << std::endl;
+                    }
+                    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))
+              {
+                 if (Debug)
+                    cout << OutputInDepth(Depth) << "  Removing " << BrokenPkg.Name() << " to avoid " << End << endl;
+                 SmartRemove(BrokenPkg);
+              }
            }
         }
       }
@@ -699,29 +766,54 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
                          return false;
    
    for (PrvIterator P = instVer.ProvidesList();
-         P.end() == false; P++)
-        CheckRConflicts(Pkg,P.ParentPkg().RevDependsList(),P.ProvideVersion());
+       P.end() == false; ++P)
+      if (Pkg->Group != P.OwnerPkg()->Group)
+        CheckRConflicts(Pkg,P.ParentPkg().RevDependsList(),P.ProvideVersion());
+
+   if (PkgLoop)
+      return true;
 
    List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
 
-   if (instVer->MultiArch == pkgCache::Version::Same)
+   if (Immediate == true && (instVer->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same)
+   {
+      /* Do lockstep M-A:same unpacking in two phases:
+        First unpack all installed architectures, then the not installed.
+        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)
+        return false;
       for (PkgIterator P = Pkg.Group().PackageList();
-         P.end() == false; P = Pkg.Group().NextPkg(P))
+          P.end() == false; P = Pkg.Group().NextPkg(P))
       {
-         if (Pkg == P || List->IsFlag(P,pkgOrderList::UnPacked) == true ||
-              Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
-               (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
-          continue;
-          SmartUnPack(P, false);
+        if (P->CurrentVer == 0 || P == Pkg || List->IsFlag(P,pkgOrderList::UnPacked) == true ||
+            Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
+             (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
+           continue;
+        if (SmartUnPack(P, false, Depth + 1) == false)
+           return false;
       }
-
-   if(Install(Pkg,FileNames[Pkg->ID]) == false)
+      if (installed == false && Install(Pkg,FileNames[Pkg->ID]) == false)
+        return false;
+      for (PkgIterator P = Pkg.Group().PackageList();
+          P.end() == false; P = Pkg.Group().NextPkg(P))
+      {
+        if (P->CurrentVer != 0 || P == Pkg || List->IsFlag(P,pkgOrderList::UnPacked) == true ||
+            Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
+             (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
+           continue;
+        if (SmartUnPack(P, false, Depth + 1) == false)
+           return false;
+      }
+   }
+   // 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)
       return false;
 
-   if (Immediate == true && List->IsFlag(Pkg,pkgOrderList::Immediate) == true) {
-   
+   if (Immediate == true) {
       // Perform immedate configuration of the package. 
-         if (SmartConfigure(Pkg) == false)
+         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);
    }
@@ -755,14 +847,14 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
       clog << "Done ordering" << endl;
 
    bool DoneSomething = false;
-   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
+   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) == false && Debug)
+            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 {
@@ -801,7 +893,7 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
            return Failed;
       }
       else
-        if (SmartUnPack(Pkg) == false)
+        if (SmartUnPack(Pkg,List->IsFlag(Pkg,pkgOrderList::Immediate),0) == false)
            return Failed;
       DoneSomething = true;
       
@@ -818,7 +910,7 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
       return Failed;
 
    // Sanity check
-   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
+   for (pkgOrderList::iterator I = List->begin(); I != List->end(); ++I)
    {
       if (List->IsFlag(*I,pkgOrderList::Configured) == false)
       {