Fix typos in documentation (codespell)

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

diff --git a/apt-pkg/packagemanager.cc b/apt-pkg/packagemanager.cc
index 1780dff09b9a9ef917bed455997a7d59800657a4..5f9a31264884208c33a31c526092bb54a469c6d3 100644 (file)
--- a/apt-pkg/packagemanager.cc
+++ b/apt-pkg/packagemanager.cc
@@ -1,6 +1,6 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/

-// $Id: packagemanager.cc,v 1.4 1998/07/12 23:58:30 jgg Exp $
+// $Id: packagemanager.cc,v 1.30 2003/04/27 03:04:15 doogie Exp $

 /* ######################################################################
 
    Package Manager - Abstacts the package manager
 /* ######################################################################
 
    Package Manager - Abstacts the package manager


@@ -13,23 +13,36 @@
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/
    ##################################################################### */
                                                                        /*}}}*/
 // Include Files                                                       /*{{{*/

-#ifdef __GNUG__
-#pragma implementation "apt-pkg/packagemanager.h"
-#endif
+#include<config.h>
+

 #include <apt-pkg/packagemanager.h>
 #include <apt-pkg/orderlist.h>
 #include <apt-pkg/depcache.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/version.h>
 #include <apt-pkg/packagemanager.h>
 #include <apt-pkg/orderlist.h>
 #include <apt-pkg/depcache.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/version.h>

+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/sptr.h>
+
+#include <iostream>
+
+#include <apti18n.h>

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

+using namespace std;
+
+bool pkgPackageManager::SigINTStop = false;

 
 // PM::PackageManager - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 
 // PM::PackageManager - Constructor                                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-pkgPackageManager::pkgPackageManager(pkgDepCache &Cache) : Cache(Cache)
+pkgPackageManager::pkgPackageManager(pkgDepCache *pCache) : Cache(*pCache),
+                                                           List(NULL), Res(Incomplete)

 {
    FileNames = new string[Cache.Head().PackageCount];
 {
    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                                     /*{{{*/
 }
                                                                        /*}}}*/
 // PM::PackageManager - Destructor                                     /*{{{*/


@@ -41,37 +54,168 @@ pkgPackageManager::~pkgPackageManager()
    delete [] FileNames;
 }
                                                                        /*}}}*/
    delete [] FileNames;
 }
                                                                        /*}}}*/

+// PM::GetArchives - Queue the archives for download                   /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool pkgPackageManager::GetArchives(pkgAcquire *Owner,pkgSourceList *Sources,
+                                   pkgRecords *Recs)
+{
+   if (CreateOrderList() == false)
+      return false;
+   
+   bool const ordering =
+       _config->FindB("PackageManager::UnpackAll",true) ?
+               List->OrderUnpack() : List->OrderCritical();
+   if (ordering == false)
+      return _error->Error("Internal ordering error");
+
+   for (pkgOrderList::iterator I = List->begin(); I != List->end(); ++I)
+   {
+      PkgIterator Pkg(Cache,*I);
+      FileNames[Pkg->ID] = string();
+      
+      // Skip packages to erase
+      if (Cache[Pkg].Delete() == true)
+        continue;
+
+      // Skip Packages that need configure only.
+      if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && 
+         Cache[Pkg].Keep() == true)
+        continue;
+
+      // Skip already processed packages
+      if (List->IsNow(Pkg) == false)
+        continue;
+
+      new pkgAcqArchive(Owner,Sources,Recs,Cache[Pkg].InstVerIter(Cache),
+                       FileNames[Pkg->ID]);
+   }
+
+   return true;
+}
+                                                                       /*}}}*/

 // PM::FixMissing - Keep all missing packages                          /*{{{*/
 // ---------------------------------------------------------------------
 /* This is called to correct the installation when packages could not
    be downloaded. */
 bool pkgPackageManager::FixMissing()
 // PM::FixMissing - Keep all missing packages                          /*{{{*/
 // ---------------------------------------------------------------------
 /* This is called to correct the installation when packages could not
    be downloaded. */
 bool pkgPackageManager::FixMissing()

-{
-   unsigned char *Touch = new unsigned char[Cache.Head().PackageCount];
-   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+{   
+   pkgDepCache::ActionGroup group(Cache);
+   pkgProblemResolver Resolve(&Cache);
+   List->SetFileList(FileNames);
+
+   bool Bad = false;
+   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I)

    {
    {

-      // Create the status list that ResolveConflicts needs
-      if ((Cache[I].DepState & pkgDepCache::DepNowMin) == pkgDepCache::DepNowMin)
-        Touch[I->ID] = (1 << 0) | (1 << 1);
-      else
-        Touch[I->ID] = 1 << 1;
-      
-      if (Cache[I].Keep() == true)
-        continue;
-      if (FileNames[I->ID].empty() == false || Cache[I].Delete() == true)
+      if (List->IsMissing(I) == false)

         continue;
         continue;

-      Cache.MarkKeep(I);
+   
+      // Okay, this file is missing and we need it. Mark it for keep 
+      Bad = true;
+      Cache.MarkKeep(I, false, false);

    }
    }

+ 
+   // We have to empty the list otherwise it will not have the new changes
+   delete List;
+   List = 0;
+   
+   if (Bad == false)
+      return true;

    
    // Now downgrade everything that is broken
    
    // Now downgrade everything that is broken

-//   Cache.ResolveConflicts(Touch);
-   delete [] Touch;
+   return Resolve.ResolveByKeep() == true && Cache.BrokenCount() == 0;   
+}
+                                                                       /*}}}*/
+// PM::ImmediateAdd - Add the immediate flag recursivly                        /*{{{*/
+// ---------------------------------------------------------------------
+/* This adds the immediate flag to the pkg and recursively to the
+   dependendies 
+ */
+void pkgPackageManager::ImmediateAdd(PkgIterator I, bool UseInstallVer, unsigned const int &Depth)
+{
+   DepIterator D;
+   
+   if(UseInstallVer)
+   {
+      if(Cache[I].InstallVer == 0)
+        return;
+      D = Cache[I].InstVerIter(Cache).DependsList(); 
+   } else {
+      if (I->CurrentVer == 0)
+        return;
+      D = I.CurrentVer().DependsList(); 
+   }

 
 

-   return Cache.BrokenCount() == 0;
+   for ( /* nothing */  ; D.end() == false; ++D)
+      if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
+      {
+        if(!List->IsFlag(D.TargetPkg(), pkgOrderList::Immediate))
+        {
+           if(Debug)
+              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);
+        }
+      }
+   return;

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

+// PM::CreateOrderList - Create the ordering class                     /*{{{*/
+// ---------------------------------------------------------------------
+/* This populates the ordering list with all the packages that are
+   going to change. */
+bool pkgPackageManager::CreateOrderList()
+{
+   if (List != 0)
+      return true;
+   
+   delete List;
+   List = new pkgOrderList(&Cache);

 
 

-// PM::DepAlwaysTrue - Returns true if this dep is irrelevent          /*{{{*/
+   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)
+   {
+      // 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) &&
+         NoImmConfigure == false) || ImmConfigureAll)
+      {
+        if(Debug && !ImmConfigureAll)
+           clog << "CreateOrderList(): Adding Immediate flag for " << I.FullName() << endl;
+        List->Flag(I,pkgOrderList::Immediate);
+        
+        if (!ImmConfigureAll) {
+           // Look for other install packages to make immediate configurea
+           ImmediateAdd(I, true);
+         
+           // And again with the current version.
+           ImmediateAdd(I, false);
+        }
+      }
+      
+      // Not interesting
+      if ((Cache[I].Keep() == true || 
+         Cache[I].InstVerIter(Cache) == I.CurrentVer()) && 
+         I.State() == pkgCache::PkgIterator::NeedsNothing &&
+         (Cache[I].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall &&
+         (I.Purge() != false || Cache[I].Mode != pkgDepCache::ModeDelete ||
+          (Cache[I].iFlags & pkgDepCache::Purge) != pkgDepCache::Purge))
+        continue;
+      
+      // Append it to the list
+      List->push_back(I);      
+   }
+   
+   return true;
+}
+                                                                       /*}}}*/
+// 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] */
 // ---------------------------------------------------------------------
 /* The restriction on provides is to eliminate the case when provides
    are transitioning between valid states [ie exim to smail] */


@@ -93,50 +237,68 @@ bool pkgPackageManager::DepAlwaysTrue(DepIterator D)
 bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
                                        const char *Ver)
 {
 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)
+      if (D->Type != pkgCache::Dep::Conflicts &&
+         D->Type != pkgCache::Dep::Obsoletes)
+        continue;
+
+      // The package hasn't been changed
+      if (List->IsNow(Pkg) == false)

         continue;
       
         continue;
       

-      if (D.ParentPkg() == Pkg)
+      // Ignore self conflicts, ignore conflicts from irrelevant versions
+      if (D.IsIgnorable(Pkg) || D.ParentVer() != D.ParentPkg().CurrentVer())

         continue;
       
         continue;
       

-      if (pkgCheckDep(D.TargetVer(),Ver,D->CompareOp) == false)
+      if (Cache.VS().CheckDep(Ver,D->CompareOp,D.TargetVer()) == false)

         continue;
 
         continue;
 

-      if (List->IsNow(Pkg) == false)
-        continue;
-      

       if (EarlyRemove(D.ParentPkg()) == false)
       if (EarlyRemove(D.ParentPkg()) == false)

-        return false;
-   }  
+        return _error->Error("Reverse conflicts early remove for package '%s' failed",
+                             Pkg.FullName().c_str());
+   }

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

-   that the final configuration is valid. */
+   that the final configuration is valid. This is also used to catch packages
+   that have not been configured when using ImmConfigureAll */

 bool pkgPackageManager::ConfigureAll()
 {
 bool pkgPackageManager::ConfigureAll()
 {

-   pkgOrderList OList(Cache);
+   pkgOrderList OList(&Cache);

    
    // Populate the order list
    
    // 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);
    
    if (OList.OrderConfigure() == false)
       return false;
       if (List->IsFlag(pkgCache::PkgIterator(Cache,*I),
                       pkgOrderList::UnPacked) == true)
         OList.push_back(*I);
    
    if (OList.OrderConfigure() == false)
       return false;

-   
+
+   std::string const conf = _config->Find("PackageManager::Configure","all");
+   bool const ConfigurePkgs = (conf == "all");
+

    // Perform the configuring
    // 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);
       
    {
       PkgIterator Pkg(Cache,*I);
       

-      if (Configure(Pkg) == false)
+      /* Check if the package has been configured, this can happen if SmartConfigure
+         calls its self */ 
+      if (List->IsFlag(Pkg,pkgOrderList::Configured)) continue;
+
+      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.FullName().c_str(),1);
+         else
+            _error->Error("Internal error, packages left unconfigured. %s",Pkg.FullName().c_str());

         return false;
         return false;

+      }

       
       List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
    }
       
       List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
    }


@@ -146,109 +308,225 @@ bool pkgPackageManager::ConfigureAll()
                                                                        /*}}}*/
 // PM::SmartConfigure - Perform immediate configuration of the pkg     /*{{{*/
 // ---------------------------------------------------------------------
                                                                        /*}}}*/
 // PM::SmartConfigure - Perform immediate configuration of the pkg     /*{{{*/
 // ---------------------------------------------------------------------

-/* This routine scheduals the configuration of the given package and all
-   of it's dependents. */
-bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
-{
-   pkgOrderList OList(Cache);
-
-   if (DepAdd(OList,Pkg) == false)
-      return false;
+/* 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. 

    
    

-   if (OList.OrderConfigure() == false)
-      return false;
+   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*/
+bool pkgPackageManager::SmartConfigure(PkgIterator Pkg, int const Depth)
+{
+   // If this is true, only check and correct and dependencies without the Loop flag
+   bool const PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);

 
 

-   // Perform the configuring
-   for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
-   {
-      PkgIterator Pkg(Cache,*I);
-      
-      if (Configure(Pkg) == false)
-        return false;
-      
-      List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
+   if (Debug) {
+      VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
+      clog << OutputInDepth(Depth) << "SmartConfigure " << Pkg.FullName() << " (" << InstallVer.VerStr() << ")";
+      if (PkgLoop)
+        clog << " (Only Correct Dependencies)";
+      clog << endl;

    }
 
    }
 

-   // Sanity Check
-   if (List->IsFlag(Pkg,pkgOrderList::Configured) == false)
-      return _error->Error("Internal error, could not immediate configure %s",Pkg.Name());
-   
-   return true;
-}
-                                                                       /*}}}*/
-// PM::DepAdd - Add all dependents to the oder list                    /*{{{*/
-// ---------------------------------------------------------------------
-/* This recursively adds all dependents to the order list */
-bool pkgPackageManager::DepAdd(pkgOrderList &OList,PkgIterator Pkg,int Depth)
-{
-   if (OList.IsFlag(Pkg,pkgOrderList::Added) == true)
-      return true;
-   if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
-      return true;
-   if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == false)
-      return false;
-   
-   
-   // Put the package on the list
-   OList.push_back(Pkg);
-   OList.Flag(Pkg,pkgOrderList::Added);
-   Depth++;
-
-   // Check the dependencies to see if they are all satisfied.
-   bool Bad = false;
-   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); D.end() == false;)
-   {
-      if (D->Type != pkgCache::Dep::Depends && D->Type != pkgCache::Dep::PreDepends)
-      {
-        D++;
-        continue;
-      }
+   VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);

       
       

-      // Grok or groups
-      Bad = true;
-      for (bool LastOR = true; D.end() == false && LastOR == true; D++)
+   /* 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);
+   unsigned int i=0;
+   std::list<DepIterator> needConfigure;
+   do
+   {
+      Changed = false;
+      for (DepIterator D = instVer.DependsList(); D.end() == false; )

       {
       {

-        LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
-        
-        if (Bad == false)
+        // Compute a single dependency element (glob or)
+        pkgCache::DepIterator Start, End;
+        D.GlobOr(Start,End);
+
+        if (End->Type != pkgCache::Dep::Depends)

            continue;
            continue;

+        Bad = true;

 
 

-        Version **VList = D.AllTargets();
-        for (Version **I = VList; *I != 0 && Bad == true; I++)
+        // Check for dependencies that have not been unpacked, probably due to loops.
+        for (DepIterator Cur = Start; true; ++Cur)

         {
         {

-           VerIterator Ver(Cache,*I);
-           PkgIterator Pkg = Ver.ParentPkg();
+           SPtrArray<Version *> VList = Cur.AllTargets();

 
 

-           // See if the current version is ok
-           if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true && 
-               Pkg.State() == PkgIterator::NeedsNothing)
+           for (Version **I = VList; *I != 0; ++I)

            {
            {

-              Bad = false;
-              continue;
+              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;
+              }
+
+              // 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;
+                 break;
+              }
+              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;
+              }

            }
            }

-           
-           // Not the install version 
-           if (Cache[Pkg].InstallVer != *I || 
-               (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
-              continue;
-           if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == true)
-              Bad = !DepAdd(OList,Pkg,Depth);
-           if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
-              Bad = false;
+
+           if (Cur == End || Bad == false)
+              break;

         }
         }

-        delete [] VList;
+
+        if (Bad == false)
+           continue;
+
+        needConfigure.push_back(Start);

       }
       }

-      
-      if (Bad == true)
+      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)

       {
       {

-        OList.Flag(Pkg,0,pkgOrderList::Added);
-        OList.pop_back();
-        Depth--;
-        return false;
+        // 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;
+                 }
+                 /* 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;
+              }
+              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 (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());
+      return false;

    }
    
    }
    

-   Depth--;
+   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.FullName().c_str());
+
+   if (ConfigurePkgs == true && Configure(Pkg) == false)
+      return false;
+
+   List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
+
+   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))
+      {
+        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));
+      }
+
+   // Sanity Check
+   if (List->IsFlag(Pkg,pkgOrderList::Configured) == false)
+      return _error->Error(_("Could not configure '%s'. "),Pkg.FullName().c_str());
+

    return true;
 }
                                                                        /*}}}*/
    return true;
 }
                                                                        /*}}}*/


@@ -267,6 +545,34 @@ bool pkgPackageManager::EarlyRemove(PkgIterator Pkg)
    // 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;

+
+   // 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 
+      promote them too */
+   if (Pkg->CurrentVer != 0)
+   {
+      for (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 ||
+               (D.ParentPkg()->Flags & pkgCache::Flag::Important) != 0)
+              IsEssential = true;
+   }
+
+   if (IsEssential == true)
+   {
+      if (_config->FindB("APT::Force-LoopBreak",false) == false)
+        return _error->Error(_("This installation run will require temporarily "
+                               "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.FullName().c_str());
+   }

    
    bool Res = SmartRemove(Pkg);
    if (Cache[Pkg].Delete() == false)
    
    bool Res = SmartRemove(Pkg);
    if (Cache[Pkg].Delete() == false)


@@ -284,108 +590,338 @@ bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
       return true;
 
    List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
       return true;
 
    List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);

-   return Remove(Pkg);
+
+   return Remove(Pkg,(Cache[Pkg].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge);

 }
                                                                        /*}}}*/
 // PM::SmartUnPack - Install helper                                    /*{{{*/
 // ---------------------------------------------------------------------
 }
                                                                        /*}}}*/
 // PM::SmartUnPack - Install helper                                    /*{{{*/
 // ---------------------------------------------------------------------

-/* This performs the task of handling pre-depends. */
+/* 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)
 {
 bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
 {

-   // Check if it is already unpacked
-   if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure &&
-       Cache[Pkg].Keep() == true)
-   {
-      List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);
-      if (List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
-        if (SmartConfigure(Pkg) == false)
-           return _error->Error("Internal Error, Could not perform immediate configuraton");
-      return true;
+   return SmartUnPack(Pkg, true, 0);
+}
+bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate, int const Depth)
+{
+   bool PkgLoop = List->IsFlag(Pkg,pkgOrderList::Loop);
+
+   if (Debug) {
+      clog << OutputInDepth(Depth) << "SmartUnPack " << Pkg.FullName();
+      VerIterator InstallVer = VerIterator(Cache,Cache[Pkg].InstallVer);
+      if (Pkg.CurrentVer() == 0)
+        clog << " (install version " << InstallVer.VerStr() << ")";
+      else
+        clog << " (replace version " << Pkg.CurrentVer().VerStr() << " with " << InstallVer.VerStr() << ")";
+      if (PkgLoop)
+        clog << " (Only Perform PreUnpack Checks)";
+      clog << endl;

    }
    }

-   
-   /* See if this packages install version has any predependencies
-      that are not met by 'now' packages. */
-   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); 
-       D.end() == false; D++)
+
+   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
+      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 .
+      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;
+   const unsigned int max_loops = _config->FindI("APT::pkgPackageManager::MaxLoopCount", 5000);
+   unsigned int i = 0;
+   do 

    {
    {

-      if (D->Type == pkgCache::Dep::PreDepends)
+      Changed = false;
+      for (DepIterator D = instVer.DependsList(); D.end() == false; )

       {
       {

-        // Look for possible ok targets.
-        Version **VList = D.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)
+        // Compute a single dependency element (glob or)
+        pkgCache::DepIterator Start, End;
+        D.GlobOr(Start,End);
+
+        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;
-              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;
+           }
+
+           // Look for something that could be configured.
+           for (DepIterator Cur = Start; Bad == true && Cur.end() == false; ++Cur)
+           {
+              SPtrArray<Version *> VList = Cur.AllTargets();
+              for (Version **I = VList; *I != 0; ++I)
+              {
+                 VerIterator Ver(Cache,*I);
+                 PkgIterator Pkg = Ver.ParentPkg();
+
+                 // Not the install version
+                 if (Cache[Pkg].InstallVer != *I ||
+                     (Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing))
+                    continue;
+
+                 if (List->IsFlag(Pkg,pkgOrderList::Configured))
+                 {
+                    Bad = false;
+                    break;
+                 }
+
+                 // check if it needs unpack or if if configure is enough
+                 if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == false)
+                 {
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Trying to SmartUnpack " << Pkg.FullName() << endl;
+                    // SmartUnpack with the ImmediateFlag to ensure its really ready
+                    if (SmartUnPack(Pkg, true, Depth + 1) == true)
+                    {
+                       Bad = false;
+                       if (List->IsFlag(Pkg,pkgOrderList::Loop) == false)
+                          Changed = true;
+                       break;
+                    }
+                 }
+                 else
+                 {
+                    if (Debug)
+                       clog << OutputInDepth(Depth) << "Trying to SmartConfigure " << Pkg.FullName() << endl;
+                    if (SmartConfigure(Pkg, Depth + 1) == true)
+                    {
+                       Bad = false;
+                       if (List->IsFlag(Pkg,pkgOrderList::Loop) == false)
+                          Changed = true;
+                       break;
+                    }
+                 }
+              }
+           }
+
+           if (Bad == true)
+           {
+              if (Start == End)
+                 return _error->Error("Couldn't configure pre-depend %s for %s, "
+                                       "probably a dependency cycle.",
+                                       End.TargetPkg().FullName().c_str(),Pkg.FullName().c_str());

            }
            }

+           else
+              continue;

         }
         }

-        
-        // Look for something that could be configured.
-        for (Version **I = VList; *I != 0 && Bad == true; I++)
+        else if (End->Type == pkgCache::Dep::Conflicts ||
+                 End->Type == pkgCache::Dep::Obsoletes)

         {
         {

-           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;
+           /* 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);

 
 

-           Bad = !SmartConfigure(Pkg);
+              // See if the current version is conflicting
+              if (ConflictPkg.CurrentVer() == Ver && List->IsNow(ConflictPkg))
+              {
+                 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)
+                 {
+                    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());
+                 }
+              }
+           }

         }
         }

-        
-        delete [] VList;
-        
-        if (Bad == true)
-           return _error->Error("Internal Error, Couldn't configure a pre-depend");
-
-        continue;
-      }
-      
-      if (D->Type == pkgCache::Dep::Conflicts)
-      {
-        /* Look for conflicts. Two packages that are both in the install
-           state cannot conflict so we don't check.. */
-        Version **VList = D.AllTargets();
-        for (Version **I = VList; *I != 0; I++)
+        else if (End->Type == pkgCache::Dep::DpkgBreaks)

         {
         {

-           VerIterator Ver(Cache,*I);
-           PkgIterator Pkg = Ver.ParentPkg();
-           
-           // See if the current version is conflicting
-           if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true)
+           SPtrArray<Version *> VList = End.AllTargets();
+           for (Version **I = VList; *I != 0; ++I)

            {
            {

-              if (EarlyRemove(Pkg) == false)
-                 return _error->Error("Internal Error, Could not early remove %s",Pkg.Name());
+              VerIterator Ver(Cache,*I);
+              PkgIterator BrokenPkg = Ver.ParentPkg();
+              if (BrokenPkg.CurrentVer() != Ver)
+              {
+                 if (Debug)
+                    std::clog << OutputInDepth(Depth) << "  Ignore not-installed version " << Ver.VerStr() << " of " << Pkg.FullName() << " for " << End << std::endl;
+                 continue;
+              }
+
+              // Check if it needs to be unpacked
+              if (List->IsFlag(BrokenPkg,pkgOrderList::InList) && Cache[BrokenPkg].Delete() == false &&
+                  List->IsNow(BrokenPkg))
+              {
+                 if (List->IsFlag(BrokenPkg,pkgOrderList::Loop) && PkgLoop)
+                 {
+                    // This dependency has already been dealt with by another SmartUnPack on Pkg
+                    break;
+                 }
+                 else
+                 {
+                    // 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)
+                    {
+                       if (D->Type != pkgCache::Dep::PreDepends)
+                          continue;
+                       SPtrArray<Version *> VL = D.AllTargets();
+                       for (Version **I = VL; *I != 0; ++I)
+                       {
+                          VerIterator V(Cache,*I);
+                          PkgIterator P = V.ParentPkg();
+                          // we are checking for installation as an easy 'protection' against or-groups and (unchosen) providers
+                          if (P != Pkg || (P.CurrentVer() != V && Cache[P].InstallVer != V))
+                             continue;
+                          circle = true;
+                          break;
+                       }
+                       if (circle == true)
+                          break;
+                    }
+                    if (circle == true)
+                    {
+                       if (Debug)
+                          clog << OutputInDepth(Depth) << "  Avoiding " << End << " avoided as " << BrokenPkg.FullName() << " has a pre-depends on " << Pkg.FullName() << std::endl;
+                       continue;
+                    }
+                    else
+                    {
+                       if (Debug)
+                       {
+                          clog << OutputInDepth(Depth) << "  Unpacking " << BrokenPkg.FullName() << " to avoid " << End;
+                          if (PkgLoop == true)
+                             clog << " (Looping)";
+                          clog << std::endl;
+                       }
+                       if (PkgLoop == false)
+                          List->Flag(Pkg,pkgOrderList::Loop);
+                       if (SmartUnPack(BrokenPkg, false, Depth + 1) == true)
+                       {
+                          if (List->IsFlag(BrokenPkg,pkgOrderList::Loop) == false)
+                             Changed = true;
+                       }
+                       if (PkgLoop == false)
+                          List->RmFlag(Pkg,pkgOrderList::Loop);
+                    }
+                 }
+              }
+              // Check if a package needs to be removed
+              else if (Cache[BrokenPkg].Delete() == true && List->IsFlag(BrokenPkg,pkgOrderList::Configured) == false)
+              {
+                 if (Debug)
+                    clog << OutputInDepth(Depth) << "  Removing " << BrokenPkg.FullName() << " to avoid " << End << endl;
+                 SmartRemove(BrokenPkg);
+              }

            }
         }
            }
         }

-        delete [] VList;

       }
       }

-   }
-
-   // Check for reverse conflicts.
-   CheckRConflicts(Pkg,Pkg.RevDependsList(),
-                  Cache[Pkg].InstVerIter(Cache).VerStr());
-   for (PrvIterator P = Cache[Pkg].InstVerIter(Cache).ProvidesList(); 
-       P.end() == false; P++)
-      CheckRConflicts(Pkg,P.ParentPkg().RevDependsList(),P.ProvideVersion());
+      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 (Install(Pkg,FileNames[Pkg->ID]) == false)
-      return false;
+   // Check for reverse conflicts.
+   if (CheckRConflicts(Pkg,Pkg.RevDependsList(),
+                  instVer.VerStr()) == false)
+                         return false;

    
    

+   for (PrvIterator P = instVer.ProvidesList();
+       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);
    List->Flag(Pkg,pkgOrderList::UnPacked,pkgOrderList::States);

-   
-   // Perform immedate configuration of the package.
-   if (List->IsFlag(Pkg,pkgOrderList::Immediate) == true)
-      if (SmartConfigure(Pkg) == false)
-        return _error->Error("Internal Error, Could not perform immediate configuraton");
+
+   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 &&
+         (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))
+      {
+        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 (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 ||
+            List->IsFlag(P,pkgOrderList::Configured) == 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 ((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.FullName().c_str(),2);
+   }

    
    return true;
 }
    
    return true;
 }


@@ -393,84 +929,176 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
 // PM::OrderInstall - Installation ordering routine                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */
 // PM::OrderInstall - Installation ordering routine                    /*{{{*/
 // ---------------------------------------------------------------------
 /* */

-bool pkgPackageManager::OrderInstall()
+pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()

 {
 {

-   delete List;
-   List = new pkgOrderList(Cache);
+   if (CreateOrderList() == false)
+      return Failed;
+
+   Reset();

    
    

-   // Generate the list of affected packages and sort it
-   for (PkgIterator I = Cache.PkgBegin(); I.end() == false; I++)
+   if (Debug == true)
+      clog << "Beginning to order" << endl;
+
+   bool const ordering =
+       _config->FindB("PackageManager::UnpackAll",true) ?
+               List->OrderUnpack(FileNames) : List->OrderCritical();
+   if (ordering == false)

    {
    {

-      // Consider all depends
-      if ((I->Flags & pkgCache::Flag::Essential) == pkgCache::Flag::Essential)
-      {
-        List->Flag(I,pkgOrderList::Immediate);
-        if (Cache[I].InstallVer != 0)
-           for (DepIterator D = Cache[I].InstVerIter(Cache).DependsList(); 
-                D.end() == false; D++)
-              if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
-                 List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
-        if (I->CurrentVer != 0)
-           for (DepIterator D = I.CurrentVer().DependsList(); 
-                D.end() == false; D++)
-              if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends)
-                 List->Flag(D.TargetPkg(),pkgOrderList::Immediate);
-      }
-      
-      // Not interesting
-      if ((Cache[I].Keep() == true || 
-         Cache[I].InstVerIter(Cache) == I.CurrentVer()) && 
-         I.State() == pkgCache::PkgIterator::NeedsNothing)
-        continue;
-      
-      // Append it to the list
-      List->push_back(I);
-      
-      if ((I->Flags & pkgCache::Flag::ImmediateConf) == pkgCache::Flag::ImmediateConf)
-        List->Flag(I,pkgOrderList::Immediate);
+      _error->Error("Internal ordering error");
+      return Failed;

    }
    
    }
    

-   if (List->OrderUnpack() == false)
-      return _error->Error("Internal ordering error");
+   if (Debug == true)
+      clog << "Done ordering" << endl;

 
 

-   for (pkgOrderList::iterator I = List->begin(); I != List->end(); I++)
+   bool DoneSomething = false;
+   for (pkgOrderList::iterator I = List->begin(); I != List->end(); ++I)

    {
       PkgIterator Pkg(Cache,*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.FullName().c_str());
+            // FIXME: The above warning message might need changing
+         } else {
+           if (Debug == true)
+              clog << "Skipping already done " << Pkg.FullName() << endl;
+        }
+        continue;
+        
+      }
+      
+      if (List->IsMissing(Pkg) == true)
+      {
+        if (Debug == true)
+           clog << "Sequence completed at " << Pkg.FullName() << endl;
+        if (DoneSomething == false)
+        {
+           _error->Error("Internal Error, ordering was unable to handle the media swap");
+           return Failed;
+        }       
+        return Incomplete;
+      }
+      

       // Sanity check
       // Sanity check

-      if (Cache[Pkg].Keep() == true && Pkg.State() == pkgCache::PkgIterator::NeedsNothing)
-        return _error->Error("Internal Error, trying to manipulate a kept package");
+      if (Cache[Pkg].Keep() == true && 
+         Pkg.State() == pkgCache::PkgIterator::NeedsNothing &&
+         (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall)
+      {
+        _error->Error("Internal Error, trying to manipulate a kept package (%s)",Pkg.FullName().c_str());
+        return Failed;
+      }

       
       // Perform a delete or an install
       if (Cache[Pkg].Delete() == true)
       {
         if (SmartRemove(Pkg) == false)
       
       // Perform a delete or an install
       if (Cache[Pkg].Delete() == true)
       {
         if (SmartRemove(Pkg) == false)

-           return false;        
+           return Failed;

       }
       else
       }
       else

-        if (SmartUnPack(Pkg) == false)
-           return false;
+        if (SmartUnPack(Pkg,List->IsFlag(Pkg,pkgOrderList::Immediate),0) == false)
+           return Failed;
+      DoneSomething = true;
+      
+      if (ImmConfigureAll) {
+         /* ConfigureAll here to pick up and packages left unconfigured because they were unpacked in the
+            "PreUnpack Checks" section */
+         if (!ConfigureAll())
+            return Failed; 
+      }

    }
    }

-   
+

    // Final run through the configure phase
    if (ConfigureAll() == false)
    // Final run through the configure phase
    if (ConfigureAll() == false)

-      return false;
+      return Failed;

 
    // Sanity check
 
    // 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)
       if (List->IsFlag(*I,pkgOrderList::Configured) == false)

-        return _error->Error("Internal error, packages left unconfigured. %s",
-                             PkgIterator(Cache,*I).Name());
-
-   return true;
+      {
+        _error->Error("Internal error, packages left unconfigured. %s",
+                      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(APT::Progress::PackageManager *progress)
+{
+   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.*/
 // PM::DoInstall - Does the installation                               /*{{{*/
 // ---------------------------------------------------------------------
 /* This uses the filenames in FileNames and the information in the
    DepCache to perform the installation of packages.*/

-bool pkgPackageManager::DoInstall()
+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
+pkgPackageManager::OrderResult 
+pkgPackageManager::DoInstall(APT::Progress::PackageManager *progress)

 {
 {

-   return OrderInstall() && Go();
+   if(DoInstallPreFork() == Failed)
+      return Failed;
+   
+   return DoInstallPostFork(progress);

 }
 }

-                                                                       /*}}}*/
+#endif
+                                                                       /*}}}*/