fix 'Dead assignment' by dropping unneeded boolean

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

diff --git a/apt-pkg/packagemanager.cc b/apt-pkg/packagemanager.cc
index 5d6bc6bd2ee857d3bf92f5ae83efa672be54452d..de63c1aa8bd366bfee50565531f2cc05bf57d014 100644 (file)
--- a/apt-pkg/packagemanager.cc
+++ b/apt-pkg/packagemanager.cc
@@ -23,11 +23,11 @@
 #include <apt-pkg/acquire-item.h>
 #include <apt-pkg/algorithms.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/acquire-item.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/macros.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/cacheiterators.h>
 #include <apt-pkg/strutl.h>

+#include <apt-pkg/install-progress.h>

 
 #include <stddef.h>
 #include <list>
 
 #include <stddef.h>
 #include <list>


@@ -44,7 +44,7 @@ bool pkgPackageManager::SigINTStop = false;
 // ---------------------------------------------------------------------
 /* */
 pkgPackageManager::pkgPackageManager(pkgDepCache *pCache) : Cache(*pCache),
 // ---------------------------------------------------------------------
 /* */
 pkgPackageManager::pkgPackageManager(pkgDepCache *pCache) : Cache(*pCache),

-                                                           List(NULL), Res(Incomplete)
+                                                           List(NULL), Res(Incomplete), d(NULL)

 {
    FileNames = new string[Cache.Head().PackageCount];
    Debug = _config->FindB("Debug::pkgPackageManager",false);
 {
    FileNames = new string[Cache.Head().PackageCount];
    Debug = _config->FindB("Debug::pkgPackageManager",false);


@@ -261,13 +261,40 @@ bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
       if (Cache.VS().CheckDep(Ver,D->CompareOp,D.TargetVer()) == false)
         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.FullName().c_str());
    }
    return true;
 }
                                                                        /*}}}*/
         return _error->Error("Reverse conflicts early remove for package '%s' failed",
                              Pkg.FullName().c_str());
    }
    return true;
 }
                                                                        /*}}}*/

+// PM::CheckRBreaks - Look for reverse breaks                          /*{{{*/
+bool pkgPackageManager::CheckRBreaks(PkgIterator const &Pkg, DepIterator D,
+                                    const char * const Ver)
+{
+   for (;D.end() == false; ++D)
+   {
+      if (D->Type != pkgCache::Dep::DpkgBreaks)
+        continue;
+
+      PkgIterator const DP = D.ParentPkg();
+      if (Cache[DP].Delete() == false)
+        continue;
+
+      // Ignore self conflicts, ignore conflicts from irrelevant versions
+      if (D.IsIgnorable(Pkg) || D.ParentVer() != DP.CurrentVer())
+        continue;
+
+      if (Cache.VS().CheckDep(Ver, D->CompareOp, D.TargetVer()) == false)
+        continue;
+
+      // no earlyremove() here as user has already agreed to the permanent removal
+      if (SmartRemove(DP) == false)
+        return _error->Error("Internal Error, Could not early remove %s (%d)",DP.FullName().c_str(), 4);
+   }
+   return true;
+}
+                                                                       /*}}}*/

 // PM::ConfigureAll - Run the all out configuration                    /*{{{*/
 // ---------------------------------------------------------------------
 /* This configures every package. It is assumed they are all unpacked and
 // PM::ConfigureAll - Run the all out configuration                    /*{{{*/
 // ---------------------------------------------------------------------
 /* This configures every package. It is assumed they are all unpacked and


@@ -313,18 +340,41 @@ bool pkgPackageManager::ConfigureAll()
    return true;
 }
                                                                        /*}}}*/
    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.
 // 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 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*/
+   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 pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
 {
    // If this is true, only check and correct and dependencies without the Loop flag


@@ -339,9 +389,9 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
    }
 
    VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
    }
 
    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, Changed = false;
    const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);
       be the case, so check for dependencies before configuring. */
    bool Bad = false, Changed = false;
    const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);


@@ -349,6 +399,8 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
    std::list<DepIterator> needConfigure;
    do
    {
    std::list<DepIterator> needConfigure;
    do
    {

+      // Check each dependency and see if anything needs to be done
+      // so that it can be configured

       Changed = false;
       for (DepIterator D = instVer.DependsList(); D.end() == false; )
       {
       Changed = false;
       for (DepIterator D = instVer.DependsList(); D.end() == false; )
       {


@@ -360,12 +412,13 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
            continue;
         Bad = true;
 
            continue;
         Bad = true;
 

-        // Check for dependencies that have not been unpacked, probably due to loops.
+         // the first pass checks if we its all good, i.e. if we have
+         // to do anything at all

         for (DepIterator Cur = Start; true; ++Cur)
         {
         for (DepIterator Cur = Start; true; ++Cur)
         {

-           SPtrArray<Version *> VList = Cur.AllTargets();
+           std::unique_ptr<Version *> VList(Cur.AllTargets());

 
 

-           for (Version **I = VList; *I != 0; ++I)
+           for (Version **I = VList.get(); *I != 0; ++I)

            {
               VerIterator Ver(Cache,*I);
               PkgIterator DepPkg = Ver.ParentPkg();
            {
               VerIterator Ver(Cache,*I);
               PkgIterator DepPkg = Ver.ParentPkg();


@@ -373,7 +426,8 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
               // 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 &&
               // 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)
+                  DepPkg.State() == PkgIterator::NeedsNothing &&
+                  (Cache[DepPkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)

               {
                  Bad = false;
                  break;
               {
                  Bad = false;
                  break;


@@ -386,27 +440,71 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
               if (PkgLoop == true)
               {
                  if (Debug)
               if (PkgLoop == true)
               {
                  if (Debug)

-                    std::clog << OutputInDepth(Depth) << "Package " << Pkg << " loops in SmartConfigure" << std::endl;
-                 Bad = false;
-                 break;
+                    std::clog << OutputInDepth(Depth) << "Package " << Pkg << " loops in SmartConfigure";
+                 if (List->IsFlag(DepPkg,pkgOrderList::UnPacked))
+                    Bad = false;
+                 else if (Debug)
+                    std::clog << ", but it isn't unpacked yet";
+                 if (Debug)
+                    std::clog << std::endl;
+              }
+           }
+
+            if (Cur == End || Bad == false)
+              break;
+         }
+
+         // this dependency is in a good state, so we can stop
+         if (Bad == false)
+         {
+            if (Debug)
+               std::clog << OutputInDepth(Depth) << "Found ok dep " << Start.TargetPkg() << std::endl;
+            continue;
+         }
+
+        // Check for dependencies that have not been unpacked, 
+         // probably due to loops.
+        for (DepIterator Cur = Start; true; ++Cur)
+        {
+           std::unique_ptr<Version *> VList(Cur.AllTargets());
+
+           for (Version **I = VList.get(); *I != 0; ++I)
+           {
+              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 &&
+                  (Cache[DepPkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)
+                  continue;
+
+              // 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";
+                 if (List->IsFlag(DepPkg,pkgOrderList::UnPacked))
+                    Bad = false;
+                 else if (Debug)
+                    std::clog << ", but it isn't unpacked yet";
+                 if (Debug)
+                    std::clog << std::endl;

               }
               else
               {
                  if (Debug)
                     clog << OutputInDepth(Depth) << "Unpacking " << DepPkg.FullName() << " to avoid loop " << Cur << endl;
               }
               else
               {
                  if (Debug)
                     clog << OutputInDepth(Depth) << "Unpacking " << DepPkg.FullName() << " to avoid loop " << Cur << endl;

-                 if (PkgLoop == false)
-                    List->Flag(Pkg,pkgOrderList::Loop);
-                 if (SmartUnPack(DepPkg, true, Depth + 1) == true)
-                 {
-                    Bad = false;
-                    if (List->IsFlag(DepPkg,pkgOrderList::Loop) == false)
-                       Changed = true;
-                 }
-                 if (PkgLoop == false)
-                    List->RmFlag(Pkg,pkgOrderList::Loop);
-                 if (Bad == false)
-                    break;
+                 if (NonLoopingSmart(UNPACK_IMMEDIATE, Pkg, DepPkg, Depth, PkgLoop, &Bad, &Changed) == false)
+                    return false;

               }
               }

+               // at this point we either unpacked a Dep or we are in a loop,
+               // no need to unpack a second one
+              break;

            }
 
            if (Cur == End || Bad == false)
            }
 
            if (Cur == End || Bad == false)


@@ -422,6 +520,7 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
          return _error->Error("Internal error: MaxLoopCount reached in SmartUnPack (1) for %s, aborting", Pkg.FullName().c_str());
    } while (Changed == true);
 
          return _error->Error("Internal error: MaxLoopCount reached in SmartUnPack (1) for %s, aborting", Pkg.FullName().c_str());
    } while (Changed == true);
 

+   // now go over anything that needs configuring

    Bad = false, Changed = false, i = 0;
    do
    {
    Bad = false, Changed = false, i = 0;
    do
    {


@@ -442,9 +541,9 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
         // Search for dependencies which are unpacked but aren't configured yet (maybe loops)
         for (DepIterator Cur = Start; true; ++Cur)
         {
         // Search for dependencies which are unpacked but aren't configured yet (maybe loops)
         for (DepIterator Cur = Start; true; ++Cur)
         {

-           SPtrArray<Version *> VList = Cur.AllTargets();
+           std::unique_ptr<Version *> VList(Cur.AllTargets());

 
 

-           for (Version **I = VList; *I != 0; ++I)
+           for (Version **I = VList.get(); *I != 0; ++I)

            {
               VerIterator Ver(Cache,*I);
               PkgIterator DepPkg = Ver.ParentPkg();
            {
               VerIterator Ver(Cache,*I);
               PkgIterator DepPkg = Ver.ParentPkg();


@@ -461,25 +560,12 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
                    Bad = false;
                    break;
                  }
                    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 (SmartConfigure(DepPkg, Depth + 1) == true)
-                 {
-                    Bad = false;
-                    if (List->IsFlag(DepPkg,pkgOrderList::Loop) == false)
-                       Changed = true;
-                 }
-                 if (PkgLoop == false)
-                   List->RmFlag(Pkg,pkgOrderList::Loop);
-                 // If SmartConfigure was succesfull, Bad is false, so break
-                 if (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))
               {
               }
               else if (List->IsFlag(DepPkg,pkgOrderList::Configured))
               {


@@ -498,19 +584,24 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
       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 (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) {
-      if (Debug)
-         _error->Warning(_("Could not configure '%s'. "),Pkg.FullName().c_str());
+
+   if (Bad == true)
+      return _error->Error(_("Could not configure '%s'. "),Pkg.FullName().c_str());
+
+   // Check for reverse conflicts.
+   if (CheckRBreaks(Pkg,Pkg.RevDependsList(), instVer.VerStr()) == false)

       return false;
       return false;

-   }
-   
+
+   for (PrvIterator P = instVer.ProvidesList(); P.end() == false; ++P)
+      if (Pkg->Group != P.OwnerPkg()->Group)
+        CheckRBreaks(Pkg,P.ParentPkg().RevDependsList(),P.ProvideVersion());
+

    if (PkgLoop) return true;
 
    static std::string const conf = _config->Find("PackageManager::Configure","all");
    static bool const ConfigurePkgs = (conf == "all" || conf == "smart");
 
    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)) 
+   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 _error->Error("Internal configure error on '%s'.", Pkg.FullName().c_str());
 
    if (ConfigurePkgs == true && Configure(Pkg) == false)


@@ -527,7 +618,8 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
             Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
              (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
            continue;
             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
       }
 
    // Sanity Check


@@ -541,29 +633,37 @@ bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
 // ---------------------------------------------------------------------
 /* This is called to deal with conflicts arising from unpacking */
 bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
 // ---------------------------------------------------------------------
 /* 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;
 {
    if (List->IsNow(Pkg) == false)
       return true;

-        
+

    // Already removed it
    if (List->IsFlag(Pkg,pkgOrderList::Removed) == true)
       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;
 
    // 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;
 
    // 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)
    {
       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 ||
           IsEssential == false; ++D)
         if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
            if ((D.ParentPkg()->Flags & pkgCache::Flag::Essential) != 0 ||


@@ -580,11 +680,14 @@ bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
                                "but if you really want to do it, activate the "
                                "APT::Force-LoopBreak option."),Pkg.FullName().c_str());
    }
                                "but if you really want to do it, activate the "
                                "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);
    bool Res = SmartRemove(Pkg);
    if (Cache[Pkg].Delete() == false)
       List->Flag(Pkg,pkgOrderList::Removed,pkgOrderList::States);

-   
+

    return Res;
 }
                                                                        /*}}}*/
    return Res;
 }
                                                                        /*}}}*/


@@ -629,13 +732,14 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
 
    VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
 
 
    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.
+   /* 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
       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 dependency structures, trying to configure some packages while breaking the loops can complicate things .
+      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. */
       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. */

-   bool Changed = 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 
    const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);
    unsigned int i = 0;
    do 


@@ -656,15 +760,16 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
            // Look for easy targets: packages that are already okay
            for (DepIterator Cur = Start; Bad == true; ++Cur)
            {
            // Look for easy targets: packages that are already okay
            for (DepIterator Cur = Start; Bad == true; ++Cur)
            {

-              SPtrArray<Version *> VList = Cur.AllTargets();
-              for (Version **I = VList; *I != 0; ++I)
+              std::unique_ptr<Version *> VList(Cur.AllTargets());
+              for (Version **I = VList.get(); *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 &&
               {
                  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)
+                     Pkg.State() == PkgIterator::NeedsNothing &&
+                     (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)

                  {
                     Bad = false;
                     if (Debug)
                  {
                     Bad = false;
                     if (Debug)


@@ -679,188 +784,159 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
            // Look for something that could be configured.
            for (DepIterator Cur = Start; Bad == true && Cur.end() == false; ++Cur)
            {
            // 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)
+              std::unique_ptr<Version *[]> VList(Cur.AllTargets());
+              for (Version **I = VList.get(); *I != 0; ++I)

               {
                  VerIterator Ver(Cache,*I);
               {
                  VerIterator Ver(Cache,*I);

-                 PkgIterator Pkg = Ver.ParentPkg();
+                 PkgIterator DepPkg = Ver.ParentPkg();

 
                  // Not the install version
 
                  // Not the install version

-                 if (Cache[Pkg].InstallVer != *I ||
-                     (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
+                 if (Cache[DepPkg].InstallVer != *I)
+                    continue;
+
+                 if (Cache[DepPkg].Keep() == true && DepPkg.State() == PkgIterator::NeedsNothing &&
+                       (Cache[DepPkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)

                     continue;
 
                     continue;
 

-                 if (List->IsFlag(Pkg,pkgOrderList::Configured))
+                 if (List->IsFlag(DepPkg,pkgOrderList::Configured))

                  {
                     Bad = false;
                     break;
                  }
 
                  // check if it needs unpack or if if configure is enough
                  {
                     Bad = false;
                     break;
                  }
 
                  // check if it needs unpack or if if configure is enough

-                 if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == false)
+                 if (List->IsFlag(DepPkg,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)
+                    // two packages pre-depending on each other can't be handled sanely
+                    if (List->IsFlag(DepPkg,pkgOrderList::Loop) && PkgLoop)

                     {
                     {

-                       Bad = false;
-                       if (List->IsFlag(Pkg,pkgOrderList::Loop) == false)
-                          Changed = true;
-                       break;
+                       // this isn't an error as there is potential for something else to satisfy it
+                       // (like a provides or an or-group member)
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << "Unpack loop detected between " << DepPkg.FullName() << " and " << Pkg.FullName() << endl;
+                       continue;

                     }
                     }

+
+                    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)
                  }
                  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;
-                    }
+                       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)
               }
            }
 
            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;
+              SomethingBad = true;

         }
         else if (End->Type == pkgCache::Dep::Conflicts ||
         }
         else if (End->Type == pkgCache::Dep::Conflicts ||

-                 End->Type == pkgCache::Dep::Obsoletes)
+                 End->Type == pkgCache::Dep::Obsoletes ||
+                 End->Type == pkgCache::Dep::DpkgBreaks)

         {
         {

-           /* 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++)
+           std::unique_ptr<Version *[]> VList(End.AllTargets());
+           for (Version **I = VList.get(); *I != 0; ++I)

            {
               VerIterator Ver(Cache,*I);
               PkgIterator ConflictPkg = Ver.ParentPkg();
            {
               VerIterator Ver(Cache,*I);
               PkgIterator ConflictPkg = Ver.ParentPkg();

-              VerIterator InstallVer(Cache,Cache[ConflictPkg].InstallVer);
+              if (ConflictPkg.CurrentVer() != Ver)
+              {
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "Ignore not-installed version " << Ver.VerStr() << " of " << ConflictPkg.FullName() << " for " << End << std::endl;
+                 continue;
+              }

 
 

-              // See if the current version is conflicting
-              if (ConflictPkg.CurrentVer() == Ver && List->IsNow(ConflictPkg))
+              if (List->IsNow(ConflictPkg) == false)

               {
                  if (Debug)
               {
                  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 (Cache[ConflictPkg].Keep() == 0 && Cache[ConflictPkg].InstallVer != 0)
-                    {
-                       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);
-                    }
-                    else if (EarlyRemove(ConflictPkg) == false)
-                       return _error->Error("Internal Error, Could not early remove %s (1)",ConflictPkg.FullName().c_str());
-                 }
-                 else if (List->IsFlag(ConflictPkg,pkgOrderList::Removed) == false)
+                    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)
                  {
                     if (Debug)

-                       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());
+                       clog << OutputInDepth(Depth) << "Because dependency is MultiArchImplicit we ignored looping on: " << ConflictPkg << endl;
+                    continue;

                  }
                  }

-              }
-           }
-        }
-        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)
                  if (Debug)

-                    std::clog << OutputInDepth(Depth) << "  Ignore not-installed version " << Ver.VerStr() << " of " << Pkg.FullName() << " for " << End << std::endl;
+                 {
+                    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 (%d)",ConflictPkg.FullName().c_str(), 3);
+                 SomethingBad = true;

                  continue;
               }
 
                  continue;
               }
 

-              // Check if it needs to be unpacked
-              if (List->IsFlag(BrokenPkg,pkgOrderList::InList) && Cache[BrokenPkg].Delete() == false &&
-                  List->IsNow(BrokenPkg))
+              if (Cache[ConflictPkg].Delete() == false)

               {
               {

-                 if (List->IsFlag(BrokenPkg,pkgOrderList::Loop) && PkgLoop)
+                 if (Debug)

                  {
                  {

-                    // This dependency has already been dealt with by another SmartUnPack on Pkg
-                    break;
+                    clog << OutputInDepth(Depth) << "Unpacking " << ConflictPkg.FullName() << " to avoid " << End;
+                    if (PkgLoop == true)
+                       clog << " (Looping)";
+                    clog << std::endl;

                  }
                  }

-                 else
+                 // 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)

                  {
                  {

-                    // 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)
+                    // but if it fails ignore this failure and look for alternative ways of solving
+                    if (Debug)

                     {
                     {

-                       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;
+                       clog << OutputInDepth(Depth) << "Avoidance unpack of " << ConflictPkg.FullName() << " failed for " << End << " ignoring:" << std::endl;
+                       _error->DumpErrors(std::clog, GlobalError::DEBUG, false);

                     }
                     }

-                    if (circle == true)
+                    _error->RevertToStack();
+                    // ignorance can only happen if a) one of the offenders is already gone
+                    if (List->IsFlag(ConflictPkg,pkgOrderList::Removed) == true)

                     {
                        if (Debug)
                     {
                        if (Debug)

-                          clog << OutputInDepth(Depth) << "  Avoiding " << End << " avoided as " << BrokenPkg.FullName() << " has a pre-depends on " << Pkg.FullName() << std::endl;
-                       continue;
+                          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)
                     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);
+                          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 (%d)",ConflictPkg.FullName().c_str(), 2);

                     }
                  }
                     }
                  }

+                 else
+                    _error->MergeWithStack();

               }
               }

-              // Check if a package needs to be removed
-              else if (Cache[BrokenPkg].Delete() == true && List->IsFlag(BrokenPkg,pkgOrderList::Configured) == false)
+              else

               {
                  if (Debug)
               {
                  if (Debug)

-                    clog << OutputInDepth(Depth) << "  Removing " << BrokenPkg.FullName() << " 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 (%d)",ConflictPkg.FullName().c_str(), 1);

               }
            }
         }
               }
            }
         }


@@ -868,7 +944,17 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
       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 (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)
    // Check for reverse conflicts.
    if (CheckRConflicts(Pkg,Pkg.RevDependsList(),
                   instVer.VerStr()) == false)


@@ -929,7 +1015,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int c
    if (Immediate == true) {
       // Perform immedate configuration of the package. 
          if (SmartConfigure(Pkg, Depth + 1) == 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'. "
+            _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);
    }
    
                "Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.FullName().c_str(),2);
    }
    


@@ -1033,7 +1119,6 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
 // PM::DoInstallPostFork - compat /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // PM::DoInstallPostFork - compat /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/

-#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)

 pkgPackageManager::OrderResult
 pkgPackageManager::DoInstallPostFork(int statusFd)
 {
 pkgPackageManager::OrderResult
 pkgPackageManager::DoInstallPostFork(int statusFd)
 {


@@ -1053,24 +1138,12 @@ pkgPackageManager::DoInstallPostFork(APT::Progress::PackageManager *progress)
    if(goResult == false) 
       return Failed;
    
    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;
 }
    return Res;
 }

-#endif

                                                                        /*}}}*/ 
 // PM::DoInstall - Does the installation                               /*{{{*/
 // ---------------------------------------------------------------------
 /* compat */
                                                                        /*}}}*/ 
 // PM::DoInstall - Does the installation                               /*{{{*/
 // ---------------------------------------------------------------------
 /* compat */

-#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)

 pkgPackageManager::OrderResult 
 pkgPackageManager::DoInstall(int statusFd)
 {
 pkgPackageManager::OrderResult 
 pkgPackageManager::DoInstall(int statusFd)
 {


@@ -1080,21 +1153,11 @@ pkgPackageManager::DoInstall(int statusFd)
     delete progress;
     return res;
  }
     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.*/
                                                                        /*}}}*/ 
 // PM::DoInstall - Does the installation                               /*{{{*/
 // ---------------------------------------------------------------------
 /* This uses the filenames in FileNames and the information in the
    DepCache to perform the installation of packages.*/

-#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)

 pkgPackageManager::OrderResult 
 pkgPackageManager::DoInstall(APT::Progress::PackageManager *progress)
 {
 pkgPackageManager::OrderResult 
 pkgPackageManager::DoInstall(APT::Progress::PackageManager *progress)
 {


@@ -1103,5 +1166,4 @@ pkgPackageManager::DoInstall(APT::Progress::PackageManager *progress)
    
    return DoInstallPostFork(progress);
 }
    
    return DoInstallPostFork(progress);
 }

-#endif

                                                                        /*}}}*/       
                                                                        /*}}}*/