SmartConfigure and SmartUnPack have got smarter! The full descriptions of what they now do is in the apt-pkg/packagemanager.cc file.

The short version is that they will both put the system in a state where there operation can be achived, this involves calling 
themselves and each other recursively. Because SmartConfigure can now configure a package and all its dependancies itself, there is
no current need for DepAdd (at least in packagemanager.cc), SmartConfigure also performs the function of the short lived VerifyConfigure
as it checks through all the dependancies before performing configuration. 

Another change is to use the ConfigureAll method in OrderInstall to clean up any packages left unconfigured during ImmConfigureAll. 
This is necessary to inprove the safety of ImmConfiguration and because of the new SIGINT functionality of dpkgpm.cc relies on no 
packages being left unconfigured between pairs of dpkg calls.  While writing this commit log, I have realised that the SIGINT stuff 
is a prototype and not ready to be used yet as I have only tested it twice.

apt-pkg/deb/dpkgpm.cc

@@ -16,6 +16,7 @@
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/cachefile.h>
+#include <apt-pkg/packagemanager.h>
 
 #include <unistd.h>
 #include <stdlib.h>
@@ -888,7 +889,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    OpenLog();
 
    // this loop is runs once per operation
-   for (vector<Item>::const_iterator I = List.begin(); I != List.end();)
+   for (vector<Item>::const_iterator I = List.begin(); I != List.end() && !pkgPackageManager::SigINTStop;)
    {
       // Do all actions with the same Op in one run
       vector<Item>::const_iterator J = I;
@@ -920,7 +921,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       // the argument list is split in a way that A depends on B
       // and they are in the same "--configure A B" run
       // - with the split they may now be configured in different
-      //   runs 
+      //   runs
       if (J - I > (signed)MaxArgs)
 	 J = I + MaxArgs;
       
@@ -1062,7 +1063,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 	 it to all processes in the group. Since dpkg ignores the signal 
 	 it doesn't die but we do! So we must also ignore it */
       sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN);
-      sighandler_t old_SIGINT = signal(SIGINT,SIG_IGN);
+      sighandler_t old_SIGINT = signal(SIGINT,SigINT);
 
       // ignore SIGHUP as well (debian #463030)
       sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN);
@@ -1207,6 +1208,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
 	    // Restore sig int/quit
 	    signal(SIGQUIT,old_SIGQUIT);
 	    signal(SIGINT,old_SIGINT);
+
 	    signal(SIGHUP,old_SIGHUP);
 	    return _error->Errno("waitpid","Couldn't wait for subprocess");
 	 }
@@ -1247,6 +1249,7 @@ bool pkgDPkgPM::Go(int OutStatusFd)
       // Restore sig int/quit
       signal(SIGQUIT,old_SIGQUIT);
       signal(SIGINT,old_SIGINT);
+      
       signal(SIGHUP,old_SIGHUP);
 
       if(master >= 0) 
@@ -1308,6 +1311,12 @@ bool pkgDPkgPM::Go(int OutStatusFd)
    Cache.writeStateFile(NULL);
    return true;
 }
+
+void SigINT(int sig) {
+   cout << " -- SIGINT -- " << endl;
+   if (_config->FindB("APT::Immediate-Configure-All",false)) 
+      pkgPackageManager::SigINTStop = true;
+} 
 									/*}}}*/
 // pkgDpkgPM::Reset - Dump the contents of the command list		/*{{{*/
 // ---------------------------------------------------------------------

apt-pkg/deb/dpkgpm.h

@@ -113,4 +113,6 @@ class pkgDPkgPM : public pkgPackageManager
    virtual ~pkgDPkgPM();
 };
 
+void SigINT(int sig);
+
 #endif

apt-pkg/packagemanager.cc

@@ -29,6 +29,8 @@
 									/*}}}*/
 using namespace std;
 
+bool pkgPackageManager::SigINTStop = false;
+
 // PM::PackageManager - Constructor					/*{{{*/
 // ---------------------------------------------------------------------
 /* */
@@ -262,7 +264,8 @@ bool pkgPackageManager::CheckRConflicts(PkgIterator Pkg,DepIterator D,
 // 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()
 {
    pkgOrderList OList(&Cache);
@@ -284,7 +287,7 @@ bool pkgPackageManager::ConfigureAll()
    {
       PkgIterator Pkg(Cache,*I);
 
-      if (ConfigurePkgs == true && VerifyAndConfigure(Pkg,OList) == false) {
+      if (ConfigurePkgs == true && SmartConfigure(Pkg) == false) {
          _error->Error("Internal error, packages left unconfigured. %s",Pkg.Name());
 	 return false;
       }
@@ -297,244 +300,142 @@ bool pkgPackageManager::ConfigureAll()
 									/*}}}*/
 // PM::SmartConfigure - Perform immediate configuration of the pkg	/*{{{*/
 // ---------------------------------------------------------------------
-/* This routine scheduals the configuration of the given package and all
-   of it's dependents. */
+/* This routine trys 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. */
 bool pkgPackageManager::SmartConfigure(PkgIterator Pkg)
 {
    if (Debug == true)
       clog << "SmartConfigure " << Pkg.Name() << endl;
-
-   pkgOrderList OList(&Cache);
-
-   if (DepAdd(OList,Pkg) == false)
-      return false;
-
-   static std::string const conf = _config->Find("PackageManager::Configure","all");
-   static bool const ConfigurePkgs = (conf == "all" || conf == "smart");
-
-   if (ConfigurePkgs == true)
-      if (OList.OrderConfigure() == false)
-	 return false;
-
-   // Perform the configuring
-   for (pkgOrderList::iterator I = OList.begin(); I != OList.end(); I++)
-   {
-      PkgIterator Pkg(Cache,*I);
-      
-      if (ConfigurePkgs == true && VerifyAndConfigure(Pkg,OList) == false)
-	 return false;
       
-      List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
-   }
-
-   if (Cache[Pkg].InstVerIter(Cache)->MultiArch == 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 ||
-	     Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
-	      (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
-	    continue;
-	 SmartConfigure(P);
-      }
-
-   // Sanity Check
-   if (List->IsFlag(Pkg,pkgOrderList::Configured) == false && Debug)
-      _error->Error(_("Could not perform immediate configuration on '%s'. "
-			"Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.Name(),1);
-
-   return true;
-}
-
-// PM::VerifyConfigure - Check configuration of dependancies     /*{{{*/
-// ---------------------------------------------------------------------
-/* This routine checks that all a packages dependancies have been 
-   configured, before it is going to be configured. If this gives a warning 
-   on a virtual package, it means that the package thats providing it is not
-   configured*/
-bool pkgPackageManager::VerifyConfigure(PkgIterator Pkg, pkgOrderList &OList)
-{
-   // If this is true at the end, then the package should not be configured
-   bool error=true;
-   // This holds the the OR status of the previous dependancy  
-   bool previousOr=false;
-
-   // First iterate through the dependancies of Pkg
-   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); D.end() == false; D++)
-   {
-      
-      /* If the dependancy is of type Depends or PreDepends, we need to check it, but only if it is going to be 
-         configured at some point */
-      if (D->Type == pkgCache::Dep::Depends || D->Type == pkgCache::Dep::PreDepends) {
-         
-         /* If the previous package and this package are OR dependancies, and the previous package satisfied the dependancy
-            then skip this dependancy as it is not relevent, this will repeat for the next package if the situation is the 
-            same */
-         if (previousOr && !error) { // As error has not been reset, this refers to the previous dependancy 
-            previousOr = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
-            continue;
-         }
-        
-         // Reset error
-         error = true;
-
-         // Check thorugh all possible versions of this dependancy (D)
-         SPtrArray<Version *> VList = D.AllTargets();
-	 for (Version **I = VList; *I != 0; I++)
-	 {
-	    VerIterator DepVer(Cache,*I);
-	    PkgIterator DepPkg = DepVer.ParentPkg();
-	    VerIterator DepInstallVer(Cache,Cache[DepPkg].InstallVer);
-	    
-	    if (DepPkg.CurrentVer() == DepVer && !List->IsFlag(DepPkg,pkgOrderList::UnPacked)) {
-	       error=false;
-	       break;
-	    }
-	    
-	    if (Cache[DepPkg].InstallVer == DepVer && 
-	       (List->IsFlag(DepPkg,pkgOrderList::Configured) || OList.IsFlag(DepPkg,pkgOrderList::InList))) {
-	       error=false;
-	       break;
-	    }
-	 }
-
-         /* Only worry here if this package is a OR with the next, as even though this package does not satisfy the OR
-            the next one might */
-         if (error && !((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or)) {
-             _error->Error("Package %s should not be configured because package %s is not configured",Pkg.Name(),D.TargetPkg().Name());
-             return false; 
-         /* If the previous package is a OR but not this package, but there is still an error then fail as it will not
-            be satisfied */    
-         } else if (error && previousOr && !((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or)) {
-             _error->Error("Package %s should not be configured because package %s (or any alternatives) are not configured",Pkg.Name(),D.TargetPkg().Name());
-             return false; 
-         }
-         
-         previousOr = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
-      } else {
-         previousOr=false;
-      }
-   }
-   return true;
-}
-
-// PM::VerifyAndConfigure - Check configuration of dependancies     /*{{{*/
-// ---------------------------------------------------------------------
-/* This routine verifies if a package can be configured and if so 
-   configures it  */
-bool pkgPackageManager::VerifyAndConfigure(PkgIterator Pkg, pkgOrderList &OList)
-{
-   if (VerifyConfigure(Pkg, OList)) 
-      return Configure(Pkg);
-   else
-      return false;
-   
-}
-									/*}}}*/
-// 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;
-
-   if (Debug) 
-      std::clog << OutputInDepth(Depth) << "DepAdd: " << Pkg.Name() << std::endl;
+   VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
       
-   // 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.
+   /* Because of the ordered list, most dependancies should be unpacked, 
+      however if there is a loop this is not the case, so check for dependancies before configuring.
+      This is done after the package installation as it makes it easier to deal with conflicts problems */
    bool Bad = false;
-   for (DepIterator D = Cache[Pkg].InstVerIter(Cache).DependsList(); D.end() == false;)
+   for (DepIterator D = instVer.DependsList();
+	D.end() == false; )
    {
-      if (D->Type != pkgCache::Dep::Depends && D->Type != pkgCache::Dep::PreDepends)
-      {
-	 D++;
-	 continue;
-      }
+      // Compute a single dependency element (glob or)
+      pkgCache::DepIterator Start;
+      pkgCache::DepIterator End;
+      D.GlobOr(Start,End);
       
-      // Grok or groups
-      Bad = true;
-      for (bool LastOR = true; D.end() == false && LastOR == true; D++)
-      {
-	 LastOR = (D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or;
-	 
-	 if (Bad == false)
-	    continue;
+      if (End->Type == pkgCache::Dep::Depends) 
+          Bad = true;
 
-	 SPtrArray<Version *> VList = D.AllTargets();
-	 for (Version **I = VList; *I != 0 && Bad == true; I++)
-	 {
+      // Check for dependanices that have not been unpacked, probably due to loops.
+      while (End->Type == pkgCache::Dep::Depends) {
+         PkgIterator DepPkg;
+         VerIterator InstallVer;
+         SPtrArray<Version *> VList = Start.AllTargets();
+         
+	 for (Version **I = VList; *I != 0; I++) {
 	    VerIterator Ver(Cache,*I);
-	    PkgIterator Pkg = Ver.ParentPkg();
-	    VerIterator InstallVer(Cache,Cache[Pkg].InstallVer);
-	    VerIterator CandVer(Cache,Cache[Pkg].CandidateVer);
+	    DepPkg = Ver.ParentPkg();
+	    
+	    if (!Bad) continue;
+	       
+	    InstallVer = VerIterator(Cache,Cache[DepPkg].InstallVer);
+	    //VerIterator CandVer(Cache,Cache[DepPkg].CandidateVer);
 	    
 	    if (Debug && false) {
 	       if (Ver==0) {
-	          cout << OutputInDepth(Depth) << "Checking if " << Ver << " of " << Pkg.Name() << " satisfies this dependancy" << endl;
+	          cout << "  Checking if " << Ver << " of " << DepPkg.Name() << " satisfies this dependancy" << endl;
 	       } else {
-	          cout << OutputInDepth(Depth) << "Checking if " << Ver.VerStr() << " of " << Pkg.Name() << " satisfies this dependancy" << endl;
+	          cout << "  Checking if " << Ver.VerStr() << " of " << DepPkg.Name() << " satisfies this dependancy" << endl;
                }
-
-               if (Pkg.CurrentVer()==0) {
-                  cout << OutputInDepth(Depth) << "  CurrentVer " << Pkg.CurrentVer() << " IsNow " << List->IsNow(Pkg) << " NeedsNothing " << (Pkg.State() == PkgIterator::NeedsNothing) << endl;
+            
+               if (DepPkg.CurrentVer()==0) {
+                  cout << "    CurrentVer " << DepPkg.CurrentVer() << " IsNow " << List->IsNow(DepPkg) << " NeedsNothing " << (DepPkg.State() == PkgIterator::NeedsNothing) << endl;
                } else { 
-                  cout << OutputInDepth(Depth) << "  CurrentVer " << Pkg.CurrentVer().VerStr() << " IsNow " << List->IsNow(Pkg) << " NeedsNothing " << (Pkg.State() == PkgIterator::NeedsNothing) << endl;
+                  cout << "    CurrentVer " << DepPkg.CurrentVer().VerStr() << " IsNow " << List->IsNow(DepPkg) << " NeedsNothing " << (DepPkg.State() == PkgIterator::NeedsNothing) << endl;
                }
-
+            
                if (InstallVer==0) {
-                  cout << OutputInDepth(Depth )<< "  InstallVer " << InstallVer << endl;
+                  cout << "    InstallVer " << InstallVer << endl;
                } else { 
-                  cout << OutputInDepth(Depth )<< "  InstallVer " << InstallVer.VerStr() << endl; 
+                  cout << "    InstallVer " << InstallVer.VerStr() << endl; 
                }
-               if (CandVer != 0)
-                  cout << OutputInDepth(Depth ) << "  CandVer " << CandVer.VerStr() << endl; 
+               //if (CandVer != 0)
+               //   cout << "    CandVer " << CandVer.VerStr() << endl; 
 
-               cout << OutputInDepth(Depth) << "  Keep " << Cache[Pkg].Keep() << " Unpacked " << List->IsFlag(Pkg,pkgOrderList::UnPacked) << " Configured " << List->IsFlag(Pkg,pkgOrderList::Configured) << endl;
+               cout << "    Keep " << Cache[DepPkg].Keep() << " Unpacked " << List->IsFlag(DepPkg,pkgOrderList::UnPacked) << " Configured " << List->IsFlag(DepPkg,pkgOrderList::Configured) << endl;
                
             }
-	    // See if the current version is ok
-	    if (Pkg.CurrentVer() == Ver && List->IsNow(Pkg) == true && 
-		Pkg.State() == PkgIterator::NeedsNothing)
+
+	    // Check if it satisfies this dependancy
+	    if (DepPkg.CurrentVer() == Ver && List->IsNow(DepPkg) == true && 
+		DepPkg.State() == PkgIterator::NeedsNothing)
 	    {
 	       Bad = false;
 	       continue;
 	    }
 	    
-	    // Not the install version 
-	    if ((Cache[Pkg].InstallVer != *I && Cache[Pkg].CandidateVer != *I) || 
-		(Cache[Pkg].Keep() == true && Pkg.State() == PkgIterator::NeedsNothing && 
-		(Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
+	    if (Cache[DepPkg].InstallVer == *I) {
+	       if (List->IsFlag(DepPkg,pkgOrderList::UnPacked)) {
+	          if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
+	             List->Flag(Pkg,pkgOrderList::Loop);
+	             Bad = !SmartConfigure(DepPkg);
+	          } else {
+	             Bad = false;
+	          }
+	       } else if (List->IsFlag(DepPkg,pkgOrderList::Configured)) {
+	          Bad = false;
+	       }
 	       continue;
-	    
-	    if (List->IsFlag(Pkg,pkgOrderList::UnPacked) == true)
-	       Bad = !DepAdd(OList,Pkg,Depth);
-	    if (List->IsFlag(Pkg,pkgOrderList::Configured) == true)
-	       Bad = false;
+	    }
 	 }
+	 
+	 if (InstallVer != 0 && Bad) {
+	    Bad = false;
+	    List->Flag(Pkg,pkgOrderList::Loop);
+	    if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
+	       if (Debug) 
+	          cout << "  Unpacking " << DepPkg.Name() << " to avoid loop" << endl;
+	       SmartUnPack(DepPkg, true);
+	    }
+	 }
+	 
+	 if (Start==End) {
+	    if (Bad && Debug) {
+	       if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
+                  _error->Warning("Could not satisfy dependancies for %s",Pkg.Name());
+               } 
+	    }
+	    break;
+	       
+	 } else {
+            Start++;
+         }
       }
+   }
+
+   static std::string const conf = _config->Find("PackageManager::Configure","all");
+   static bool const ConfigurePkgs = (conf == "all" || conf == "smart");
+
+   if (ConfigurePkgs == true && Configure(Pkg) == false)
+      return false;
       
-      if (Bad == true)
+   List->Flag(Pkg,pkgOrderList::Configured,pkgOrderList::States);
+
+   if (Cache[Pkg].InstVerIter(Cache)->MultiArch == pkgCache::Version::Same)
+      for (PkgIterator P = Pkg.Group().PackageList();
+	   P.end() == false; P = Pkg.Group().NextPkg(P))
       {
-	 if (Debug) 
-	    std::clog << OutputInDepth(Depth) << "DepAdd FAILS on: " << Pkg.Name() << std::endl;
-	 OList.Flag(Pkg,0,pkgOrderList::Added);
-	 OList.pop_back();
-	 Depth--;
-	 return false;
+	 if (Pkg == P || List->IsFlag(P,pkgOrderList::Configured) == true ||
+	     Cache[P].InstallVer == 0 || (P.CurrentVer() == Cache[P].InstallVer &&
+	      (Cache[Pkg].iFlags & pkgDepCache::ReInstall) != pkgDepCache::ReInstall))
+	    continue;
+	 SmartConfigure(P);
       }
-   }
-   
-   Depth--;
+
+   // Sanity Check
+   if (List->IsFlag(Pkg,pkgOrderList::Configured) == false && Debug)
+      _error->Warning(_("Could not perform immediate configuration on '%s'. "
+			"Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.Name(),1);
+
    return true;
 }
 									/*}}}*/
@@ -603,7 +504,8 @@ bool pkgPackageManager::SmartRemove(PkgIterator Pkg)
 									/*}}}*/
 // 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 allready
+   unpacked, or when it has been unpacked, if Immediate==true it configures it. */
 bool pkgPackageManager::SmartUnPack(PkgIterator Pkg)
 {
    return SmartUnPack(Pkg, true);
@@ -628,8 +530,11 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
    
    VerIterator const instVer = Cache[Pkg].InstVerIter(Cache);
 
-   /* See if this packages install version has any predependencies
-      that are not met by 'now' packages. */
+   /* PreUnpack Checks: This loop checks and attemps to rectify and problems that would prevent the package being unpacked.
+      It addresses: PreDepends, Conflicts, Obsoletes and DpkgBreaks. Any resolutions that do not require it should 
+      avoid configuration (calling SmartUnpack with Immediate=true), this is because any loops before Pkg is unpacked 
+      can cause problems. This will be either dealt with if the package is configured as a dependancy of 
+      Pkg (if and when Pkg is configured), or by the ConfigureAll call at the end of the for loop in OrderInstall. */
    for (DepIterator D = instVer.DependsList();
 	D.end() == false; )
    {
@@ -763,7 +668,6 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
 	    PkgIterator BrokenPkg = Ver.ParentPkg();
 	    VerIterator InstallVer(Cache,Cache[BrokenPkg].InstallVer);
 	    
-	    cout << "  " << Pkg.Name() << " breaks " << BrokenPkg.Name() << endl;
 	    if (Debug && false) {
 	       if (Ver==0) {
 	          cout << "  Checking if " << Ver << " of " << BrokenPkg.Name() << " satisfies this dependancy" << endl;
@@ -793,6 +697,7 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
 	      // Found a break, so unpack the package
 	      if (Debug) 
 	         cout << "  Unpacking " << BrokenPkg.Name() << " to avoid break" << endl;
+	      /*  */
 	      SmartUnPack(BrokenPkg, false);
 	    }
 	    // Check if a package needs to be removed
@@ -846,106 +751,13 @@ bool pkgPackageManager::SmartUnPack(PkgIterator Pkg, bool const Immediate)
    if(Install(Pkg,FileNames[Pkg->ID]) == false)
       return false;
 
-   /* Because of the ordered list, most dependancies should be unpacked, 
-      however if there is a loop this is not the case, so check for dependancies before configuring.
-      This is done after the package installation as it makes it easier to deal with conflicts problems */
-   bool Bad = true;
-   for (DepIterator D = instVer.DependsList();
-	D.end() == false; )
-   {
-      // Compute a single dependency element (glob or)
-      pkgCache::DepIterator Start;
-      pkgCache::DepIterator End;
-      D.GlobOr(Start,End);
-      
-      if (End->Type == pkgCache::Dep::Depends) 
-          Bad = true;
-
-      // Check for dependanices that have not been unpacked, probably due to loops.
-      while (End->Type == pkgCache::Dep::Depends) {
-         PkgIterator DepPkg;
-         VerIterator InstallVer;
-         SPtrArray<Version *> VList = Start.AllTargets();
-         
-	 for (Version **I = VList; *I != 0; I++) {
-	    VerIterator Ver(Cache,*I);
-	    DepPkg = Ver.ParentPkg();
-	    
-	    if (!Bad) continue;
-	       
-	    InstallVer = VerIterator(Cache,Cache[DepPkg].InstallVer);
-	    VerIterator CandVer(Cache,Cache[DepPkg].CandidateVer);
-	    
-	    if (Debug && false) {
-	       if (Ver==0) {
-	          cout << "  Checking if " << Ver << " of " << DepPkg.Name() << " satisfies this dependancy" << endl;
-	       } else {
-	          cout << "  Checking if " << Ver.VerStr() << " of " << DepPkg.Name() << " satisfies this dependancy" << endl;
-               }
-            
-               if (DepPkg.CurrentVer()==0) {
-                  cout << "    CurrentVer " << DepPkg.CurrentVer() << " IsNow " << List->IsNow(DepPkg) << " NeedsNothing " << (DepPkg.State() == PkgIterator::NeedsNothing) << endl;
-               } else { 
-                  cout << "    CurrentVer " << DepPkg.CurrentVer().VerStr() << " IsNow " << List->IsNow(DepPkg) << " NeedsNothing " << (DepPkg.State() == PkgIterator::NeedsNothing) << endl;
-               }
-            
-               if (InstallVer==0) {
-                  cout << "    InstallVer " << InstallVer << endl;
-               } else { 
-                  cout << "    InstallVer " << InstallVer.VerStr() << endl; 
-               }
-               if (CandVer != 0)
-                  cout << "    CandVer " << CandVer.VerStr() << endl; 
-
-               cout << "    Keep " << Cache[DepPkg].Keep() << " Unpacked " << List->IsFlag(DepPkg,pkgOrderList::UnPacked) << " Configured " << List->IsFlag(DepPkg,pkgOrderList::Configured) << endl;
-               
-            }
- 
-	    // Check if it satisfies this dependancy
-	    if (DepPkg.CurrentVer() == Ver && List->IsNow(DepPkg) == true && 
-		DepPkg.State() == PkgIterator::NeedsNothing)
-	    {
-	       Bad = false;
-	       continue;
-	    }
-	    
-	    if (Cache[DepPkg].InstallVer == *I && !List->IsNow(DepPkg)) {
-	       Bad = false;
-	       continue;
-	    }
-	 }
-	 
-	 if (InstallVer != 0 && Bad) {
-	    Bad = false;
-	    // Found a break, so unpack the package
-	    List->Flag(Pkg,pkgOrderList::Loop);
-	    if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
-	       if (Debug) 
-	          cout << "  Unpacking " << DepPkg.Name() << " to avoid loop" << endl;
-	       SmartUnPack(DepPkg, false);
-	    }
-	 }
-	 
-	 if (Start==End) {
-	    if (Bad && Debug) {
-	       if (!List->IsFlag(DepPkg,pkgOrderList::Loop)) {
-                  _error->Warning("Could not satisfy dependancies for %s",Pkg.Name());
-               } 
-	    }
-	    break;
-	       
-	 } else {
-            Start++;
-         }
-      }
-   }
+   if (Immediate == true && List->IsFlag(Pkg,pkgOrderList::Immediate) == true) {
    
-   // Perform immedate configuration of the package.
-   if (Immediate == true &&
-       List->IsFlag(Pkg,pkgOrderList::Immediate) == true && !Bad)
-      if (SmartConfigure(Pkg) == false)
-	 _error->Warning(_("Could not perform immediate configuration on '%s'. "
-			"Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.Name(),2);
+      // Perform immedate configuration of the package. 
+         if (SmartConfigure(Pkg) == false)
+            _error->Warning(_("Could not perform immediate configuration on '%s'. "
+               "Please see man 5 apt.conf under APT::Immediate-Configure for details. (%d)"),Pkg.Name(),2);
+   }
    
    return true;
 }
@@ -1025,6 +837,12 @@ pkgPackageManager::OrderResult pkgPackageManager::OrderInstall()
 	 if (SmartUnPack(Pkg) == false)
 	    return Failed;
       DoneSomething = true;
+      
+      if (ImmConfigureAll) {
+         /* ConfigureAll here to pick up and packages left unconfigured becuase they were unpacked in the 
+            "PreUnpack Checks" section */
+         ConfigureAll();
+      }
    }
 
    // Final run through the configure phase

apt-pkg/packagemanager.h

@@ -42,6 +42,7 @@ class pkgPackageManager : protected pkgCache::Namespace
    public:
    
    enum OrderResult {Completed,Failed,Incomplete};
+   static bool SigINTStop;
    
    protected:
    string *FileNames;
@@ -59,7 +60,6 @@ class pkgPackageManager : protected pkgCache::Namespace
    */
    std::set<std::string> disappearedPkgs;
 
-   bool DepAdd(pkgOrderList &Order,PkgIterator P,int Depth = 0);
    void ImmediateAdd(PkgIterator P, bool UseInstallVer, unsigned const int &Depth = 0);
    virtual OrderResult OrderInstall();
    bool CheckRConflicts(PkgIterator Pkg,DepIterator Dep,const char *Ver);
@@ -76,8 +76,6 @@ class pkgPackageManager : protected pkgCache::Namespace
    bool SmartUnPack(PkgIterator Pkg, bool const Immediate);
    bool SmartRemove(PkgIterator Pkg);
    bool EarlyRemove(PkgIterator Pkg);  
-   bool VerifyAndConfigure(PkgIterator Pkg, pkgOrderList &OList);
-   bool VerifyConfigure(PkgIterator Pkg, pkgOrderList &OList); 
    
    // The Actual installation implementation
    virtual bool Install(PkgIterator /*Pkg*/,string /*File*/) {return false;};