merged from lp:~donkult/apt/sid

1 files changed, 462 insertions, 141 deletions

diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc
index 3eeb18cae..ed35174bb 100644
--- a/apt-pkg/pkgcachegen.cc
+++ b/apt-pkg/pkgcachegen.cc
@@ -18,6 +18,7 @@
 #include <apt-pkg/progress.h>
 #include <apt-pkg/sourcelist.h>
 #include <apt-pkg/configuration.h>
+#include <apt-pkg/aptconfiguration.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/sptr.h>
 #include <apt-pkg/pkgsystem.h>
@@ -35,10 +36,11 @@
 #include <stdio.h>
 									/*}}}*/
 typedef vector<pkgIndexFile *>::iterator FileIterator;
+template <typename Iter> std::vector<Iter*> pkgCacheGenerator::Dynamic<Iter>::toReMap;
 
 // CacheGenerator::pkgCacheGenerator - Constructor			/*{{{*/
 // ---------------------------------------------------------------------
-/* We set the diry flag and make sure that is written to the disk */
+/* We set the dirty flag and make sure that is written to the disk */
 pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
 		    Map(*pMap), Cache(pMap,false), Progress(Prog),
 		    FoundFileDeps(0)
@@ -60,8 +62,12 @@ pkgCacheGenerator::pkgCacheGenerator(DynamicMMap *pMap,OpProgress *Prog) :
 
       // Starting header
       *Cache.HeaderP = pkgCache::Header();
-      Cache.HeaderP->VerSysName = Map.WriteString(_system->VS->Label);
-      Cache.HeaderP->Architecture = Map.WriteString(_config->Find("APT::Architecture"));
+      map_ptrloc const idxVerSysName = WriteStringInMap(_system->VS->Label);
+      Cache.HeaderP->VerSysName = idxVerSysName;
+      map_ptrloc const idxArchitecture = WriteStringInMap(_config->Find("APT::Architecture"));
+      Cache.HeaderP->Architecture = idxArchitecture;
+      if (unlikely(idxVerSysName == 0 || idxArchitecture == 0))
+	 return;
       Cache.ReMap();
    }
    else
@@ -95,6 +101,67 @@ pkgCacheGenerator::~pkgCacheGenerator()
    Map.Sync(0,sizeof(pkgCache::Header));
 }
 									/*}}}*/
+void pkgCacheGenerator::ReMap(void const * const oldMap, void const * const newMap) {/*{{{*/
+   if (oldMap == newMap)
+      return;
+
+   Cache.ReMap(false);
+
+   CurrentFile += (pkgCache::PackageFile*) newMap - (pkgCache::PackageFile*) oldMap;
+
+   for (size_t i = 0; i < _count(UniqHash); ++i)
+      if (UniqHash[i] != 0)
+	 UniqHash[i] += (pkgCache::StringItem*) newMap - (pkgCache::StringItem*) oldMap;
+
+   for (std::vector<pkgCache::GrpIterator*>::const_iterator i = Dynamic<pkgCache::GrpIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::GrpIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::PkgIterator*>::const_iterator i = Dynamic<pkgCache::PkgIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::PkgIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::VerIterator*>::const_iterator i = Dynamic<pkgCache::VerIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::VerIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::DepIterator*>::const_iterator i = Dynamic<pkgCache::DepIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::DepIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::DescIterator*>::const_iterator i = Dynamic<pkgCache::DescIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::DescIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::PrvIterator*>::const_iterator i = Dynamic<pkgCache::PrvIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::PrvIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+   for (std::vector<pkgCache::PkgFileIterator*>::const_iterator i = Dynamic<pkgCache::PkgFileIterator>::toReMap.begin();
+	i != Dynamic<pkgCache::PkgFileIterator>::toReMap.end(); ++i)
+      (*i)->ReMap(oldMap, newMap);
+}									/*}}}*/
+// CacheGenerator::WriteStringInMap					/*{{{*/
+map_ptrloc pkgCacheGenerator::WriteStringInMap(const char *String,
+					const unsigned long &Len) {
+   void const * const oldMap = Map.Data();
+   map_ptrloc const index = Map.WriteString(String, Len);
+   if (index != 0)
+      ReMap(oldMap, Map.Data());
+   return index;
+}
+									/*}}}*/
+// CacheGenerator::WriteStringInMap					/*{{{*/
+map_ptrloc pkgCacheGenerator::WriteStringInMap(const char *String) {
+   void const * const oldMap = Map.Data();
+   map_ptrloc const index = Map.WriteString(String);
+   if (index != 0)
+      ReMap(oldMap, Map.Data());
+   return index;
+}
+									/*}}}*/
+map_ptrloc pkgCacheGenerator::AllocateInMap(const unsigned long &size) {/*{{{*/
+   void const * const oldMap = Map.Data();
+   map_ptrloc const index = Map.Allocate(size);
+   if (index != 0)
+      ReMap(oldMap, Map.Data());
+   return index;
+}
+									/*}}}*/
 // CacheGenerator::MergeList - Merge the package list			/*{{{*/
 // ---------------------------------------------------------------------
 /* This provides the generation of the entries in the cache. Each loop
@@ -107,13 +174,27 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
    unsigned int Counter = 0;
    while (List.Step() == true)
    {
-      // Get a pointer to the package structure
-      string PackageName = List.Package();
+      string const PackageName = List.Package();
       if (PackageName.empty() == true)
 	 return false;
-      
+
+      /* As we handle Arch all packages as architecture bounded
+         we add all information to every (simulated) arch package */
+      std::vector<string> genArch;
+      if (List.ArchitectureAll() == true) {
+	 genArch = APT::Configuration::getArchitectures();
+	 if (genArch.size() != 1)
+	    genArch.push_back("all");
+      } else
+	 genArch.push_back(List.Architecture());
+
+      for (std::vector<string>::const_iterator arch = genArch.begin();
+	   arch != genArch.end(); ++arch)
+      {
+      // Get a pointer to the package structure
       pkgCache::PkgIterator Pkg;
-      if (NewPackage(Pkg,PackageName) == false)
+      Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
+      if (NewPackage(Pkg, PackageName, *arch) == false)
 	 return _error->Error(_("Error occurred while processing %s (NewPackage)"),PackageName.c_str());
       Counter++;
       if (Counter % 100 == 0 && Progress != 0)
@@ -128,18 +209,20 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
 	 // we first process the package, then the descriptions
 	 // (this has the bonus that we get MMap error when we run out
 	 //  of MMap space)
-	 if (List.UsePackage(Pkg,pkgCache::VerIterator(Cache)) == false)
+	 pkgCache::VerIterator Ver(Cache);
+	 Dynamic<pkgCache::VerIterator> DynVer(Ver);
+	 if (List.UsePackage(Pkg, Ver) == false)
 	    return _error->Error(_("Error occurred while processing %s (UsePackage1)"),
 				 PackageName.c_str());
 
  	 // Find the right version to write the description
  	 MD5SumValue CurMd5 = List.Description_md5();
- 	 pkgCache::VerIterator Ver = Pkg.VersionList();
- 	 map_ptrloc *LastVer = &Pkg->VersionList;
+ 	 Ver = Pkg.VersionList();
 
-	 for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
+	 for (; Ver.end() == false; ++Ver)
  	 {
  	    pkgCache::DescIterator Desc = Ver.DescriptionList();
+	    Dynamic<pkgCache::DescIterator> DynDesc(Desc);
  	    map_ptrloc *LastDesc = &Ver->DescriptionList;
 	    bool duplicate=false;
 
@@ -159,7 +242,11 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
  	       if (MD5SumValue(Desc.md5()) == CurMd5) 
                {
  		  // Add new description
- 		  *LastDesc = NewDescription(Desc, List.DescriptionLanguage(), CurMd5, *LastDesc);
+		  void const * const oldMap = Map.Data();
+		  map_ptrloc const descindex = NewDescription(Desc, List.DescriptionLanguage(), CurMd5, *LastDesc);
+		  if (oldMap != Map.Data())
+		     LastDesc += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+		  *LastDesc = descindex;
  		  Desc->ParentPkg = Pkg.Index();
 		  
 		  if ((*LastDesc == 0 && _error->PendingError()) || NewFileDesc(Desc,List) == false)
@@ -173,19 +260,26 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
       }
 
       pkgCache::VerIterator Ver = Pkg.VersionList();
+      Dynamic<pkgCache::VerIterator> DynVer(Ver);
       map_ptrloc *LastVer = &Pkg->VersionList;
+      void const * oldMap = Map.Data();
       int Res = 1;
+      unsigned long const Hash = List.VersionHash();
       for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
       {
 	 Res = Cache.VS->CmpVersion(Version,Ver.VerStr());
-	 if (Res >= 0)
+	 // Version is higher as current version - insert here
+	 if (Res > 0)
+	    break;
+	 // Versionstrings are equal - is hash also equal?
+	 if (Res == 0 && Ver->Hash == Hash)
 	    break;
+	 // proceed with the next till we have either the right
+	 // or we found another version (which will be lower)
       }
-      
-      /* We already have a version for this item, record that we
-         saw it */
-      unsigned long Hash = List.VersionHash();
-      if (Res == 0 && Ver->Hash == Hash)
+
+      /* We already have a version for this item, record that we saw it */
+      if (Res == 0 && Ver.end() == false && Ver->Hash == Hash)
       {
 	 if (List.UsePackage(Pkg,Ver) == false)
 	    return _error->Error(_("Error occurred while processing %s (UsePackage2)"),
@@ -204,35 +298,31 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
 	 }
 	 
 	 continue;
-      }      
-
-      // Skip to the end of the same version set.
-      if (Res == 0)
-      {
-	 for (; Ver.end() == false; LastVer = &Ver->NextVer, Ver++)
-	 {
-	    Res = Cache.VS->CmpVersion(Version,Ver.VerStr());
-	    if (Res != 0)
-	       break;
-	 }
       }
 
       // Add a new version
-      *LastVer = NewVersion(Ver,Version,*LastVer);
+      map_ptrloc const verindex = NewVersion(Ver,Version,*LastVer);
+      if (verindex == 0 && _error->PendingError())
+	 return _error->Error(_("Error occurred while processing %s (NewVersion%d)"),
+			      PackageName.c_str(), 1);
+
+      if (oldMap != Map.Data())
+	 LastVer += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+      *LastVer = verindex;
       Ver->ParentPkg = Pkg.Index();
       Ver->Hash = Hash;
 
-      if ((*LastVer == 0 && _error->PendingError()) || List.NewVersion(Ver) == false)
-	 return _error->Error(_("Error occurred while processing %s (NewVersion1)"),
-			      PackageName.c_str());
+      if (List.NewVersion(Ver) == false)
+	 return _error->Error(_("Error occurred while processing %s (NewVersion%d)"),
+			      PackageName.c_str(), 2);
 
       if (List.UsePackage(Pkg,Ver) == false)
 	 return _error->Error(_("Error occurred while processing %s (UsePackage3)"),
 			      PackageName.c_str());
       
       if (NewFileVer(Ver,List) == false)
-	 return _error->Error(_("Error occurred while processing %s (NewVersion2)"),
-			      PackageName.c_str());
+	 return _error->Error(_("Error occurred while processing %s (NewVersion%d)"),
+			      PackageName.c_str(), 3);
 
       // Read only a single record and return
       if (OutVer != 0)
@@ -245,17 +335,23 @@ bool pkgCacheGenerator::MergeList(ListParser &List,
       /* Record the Description data. Description data always exist in
 	 Packages and Translation-* files. */
       pkgCache::DescIterator Desc = Ver.DescriptionList();
+      Dynamic<pkgCache::DescIterator> DynDesc(Desc);
       map_ptrloc *LastDesc = &Ver->DescriptionList;
-      
+
       // Skip to the end of description set
       for (; Desc.end() == false; LastDesc = &Desc->NextDesc, Desc++);
 
       // Add new description
-      *LastDesc = NewDescription(Desc, List.DescriptionLanguage(), List.Description_md5(), *LastDesc);
+      oldMap = Map.Data();
+      map_ptrloc const descindex = NewDescription(Desc, List.DescriptionLanguage(), List.Description_md5(), *LastDesc);
+      if (oldMap != Map.Data())
+	 LastDesc += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+      *LastDesc = descindex;
       Desc->ParentPkg = Pkg.Index();
 
       if ((*LastDesc == 0 && _error->PendingError()) || NewFileDesc(Desc,List) == false)
 	 return _error->Error(_("Error occurred while processing %s (NewFileDesc2)"),PackageName.c_str());
+      }
    }
 
    FoundFileDeps |= List.HasFileDeps();
@@ -297,6 +393,7 @@ bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
 	 continue;
       
       pkgCache::PkgIterator Pkg = Cache.FindPkg(PackageName);
+      Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
       if (Pkg.end() == true)
 	 return _error->Error(_("Error occurred while processing %s (FindPkg)"),
 				PackageName.c_str());
@@ -306,6 +403,7 @@ bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
 
       unsigned long Hash = List.VersionHash();
       pkgCache::VerIterator Ver = Pkg.VersionList();
+      Dynamic<pkgCache::VerIterator> DynVer(Ver);
       for (; Ver.end() == false; Ver++)
       {
 	 if (Ver->Hash == Hash && Version.c_str() == Ver.VerStr())
@@ -323,33 +421,82 @@ bool pkgCacheGenerator::MergeFileProvides(ListParser &List)
    return true;
 }
 									/*}}}*/
-// CacheGenerator::NewPackage - Add a new package			/*{{{*/
+// CacheGenerator::NewGroup - Add a new group				/*{{{*/
 // ---------------------------------------------------------------------
-/* This creates a new package structure and adds it to the hash table */
-bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg,const string &Name)
+/* This creates a new group structure and adds it to the hash table */
+bool pkgCacheGenerator::NewGroup(pkgCache::GrpIterator &Grp, const string &Name)
 {
-   Pkg = Cache.FindPkg(Name);
-   if (Pkg.end() == false)
+   Grp = Cache.FindGrp(Name);
+   if (Grp.end() == false)
       return true;
 
    // Get a structure
-   unsigned long Package = Map.Allocate(sizeof(pkgCache::Package));
-   if (Package == 0)
+   map_ptrloc const Group = AllocateInMap(sizeof(pkgCache::Group));
+   if (unlikely(Group == 0))
       return false;
-   
-   Pkg = pkgCache::PkgIterator(Cache,Cache.PkgP + Package);
-   
+
+   Grp = pkgCache::GrpIterator(Cache, Cache.GrpP + Group);
+   map_ptrloc const idxName = WriteStringInMap(Name);
+   if (unlikely(idxName == 0))
+      return false;
+   Grp->Name = idxName;
+
    // Insert it into the hash table
-   unsigned long Hash = Cache.Hash(Name);
-   Pkg->NextPackage = Cache.HeaderP->HashTable[Hash];
-   Cache.HeaderP->HashTable[Hash] = Package;
-   
-   // Set the name and the ID
-   Pkg->Name = Map.WriteString(Name);
-   if (Pkg->Name == 0)
+   unsigned long const Hash = Cache.Hash(Name);
+   Grp->Next = Cache.HeaderP->GrpHashTable[Hash];
+   Cache.HeaderP->GrpHashTable[Hash] = Group;
+
+   Grp->ID = Cache.HeaderP->GroupCount++;
+   return true;
+}
+									/*}}}*/
+// CacheGenerator::NewPackage - Add a new package			/*{{{*/
+// ---------------------------------------------------------------------
+/* This creates a new package structure and adds it to the hash table */
+bool pkgCacheGenerator::NewPackage(pkgCache::PkgIterator &Pkg,const string &Name,
+					const string &Arch) {
+   pkgCache::GrpIterator Grp;
+   Dynamic<pkgCache::GrpIterator> DynGrp(Grp);
+   if (unlikely(NewGroup(Grp, Name) == false))
+      return false;
+
+   Pkg = Grp.FindPkg(Arch);
+      if (Pkg.end() == false)
+	 return true;
+
+   // Get a structure
+   map_ptrloc const Package = AllocateInMap(sizeof(pkgCache::Package));
+   if (unlikely(Package == 0))
       return false;
+   Pkg = pkgCache::PkgIterator(Cache,Cache.PkgP + Package);
+
+   // Insert the package into our package list
+   if (Grp->FirstPackage == 0) // the group is new
+   {
+      // Insert it into the hash table
+      unsigned long const Hash = Cache.Hash(Name);
+      Pkg->NextPackage = Cache.HeaderP->PkgHashTable[Hash];
+      Cache.HeaderP->PkgHashTable[Hash] = Package;
+      Grp->FirstPackage = Package;
+   }
+   else // Group the Packages together
+   {
+      // this package is the new last package
+      pkgCache::PkgIterator LastPkg(Cache, Cache.PkgP + Grp->LastPackage);
+      Pkg->NextPackage = LastPkg->NextPackage;
+      LastPkg->NextPackage = Package;
+   }
+   Grp->LastPackage = Package;
+
+   // Set the name, arch and the ID
+   Pkg->Name = Grp->Name;
+   Pkg->Group = Grp.Index();
+   map_ptrloc const idxArch = WriteUniqString(Arch.c_str());
+   if (unlikely(idxArch == 0))
+      return false;
+   Pkg->Arch = idxArch;
    Pkg->ID = Cache.HeaderP->PackageCount++;
-   
+
    return true;
 }
 									/*}}}*/
@@ -363,7 +510,7 @@ bool pkgCacheGenerator::NewFileVer(pkgCache::VerIterator &Ver,
       return true;
    
    // Get a structure
-   unsigned long VerFile = Map.Allocate(sizeof(pkgCache::VerFile));
+   map_ptrloc const VerFile = AllocateInMap(sizeof(pkgCache::VerFile));
    if (VerFile == 0)
       return 0;
    
@@ -394,7 +541,7 @@ unsigned long pkgCacheGenerator::NewVersion(pkgCache::VerIterator &Ver,
 					    unsigned long Next)
 {
    // Get a structure
-   unsigned long Version = Map.Allocate(sizeof(pkgCache::Version));
+   map_ptrloc const Version = AllocateInMap(sizeof(pkgCache::Version));
    if (Version == 0)
       return 0;
    
@@ -402,9 +549,10 @@ unsigned long pkgCacheGenerator::NewVersion(pkgCache::VerIterator &Ver,
    Ver = pkgCache::VerIterator(Cache,Cache.VerP + Version);
    Ver->NextVer = Next;
    Ver->ID = Cache.HeaderP->VersionCount++;
-   Ver->VerStr = Map.WriteString(VerStr);
-   if (Ver->VerStr == 0)
+   map_ptrloc const idxVerStr = WriteStringInMap(VerStr);
+   if (unlikely(idxVerStr == 0))
       return 0;
+   Ver->VerStr = idxVerStr;
    
    return Version;
 }
@@ -419,7 +567,7 @@ bool pkgCacheGenerator::NewFileDesc(pkgCache::DescIterator &Desc,
       return true;
    
    // Get a structure
-   unsigned long DescFile = Map.Allocate(sizeof(pkgCache::DescFile));
+   map_ptrloc const DescFile = AllocateInMap(sizeof(pkgCache::DescFile));
    if (DescFile == 0)
       return false;
 
@@ -452,7 +600,7 @@ map_ptrloc pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc,
 					    map_ptrloc Next)
 {
    // Get a structure
-   map_ptrloc Description = Map.Allocate(sizeof(pkgCache::Description));
+   map_ptrloc const Description = AllocateInMap(sizeof(pkgCache::Description));
    if (Description == 0)
       return 0;
 
@@ -460,73 +608,149 @@ map_ptrloc pkgCacheGenerator::NewDescription(pkgCache::DescIterator &Desc,
    Desc = pkgCache::DescIterator(Cache,Cache.DescP + Description);
    Desc->NextDesc = Next;
    Desc->ID = Cache.HeaderP->DescriptionCount++;
-   Desc->language_code = Map.WriteString(Lang);
-   Desc->md5sum = Map.WriteString(md5sum.Value());
-   if (Desc->language_code == 0 || Desc->md5sum == 0)
+   map_ptrloc const idxlanguage_code = WriteStringInMap(Lang);
+   map_ptrloc const idxmd5sum = WriteStringInMap(md5sum.Value());
+   if (unlikely(idxlanguage_code == 0 || idxmd5sum == 0))
       return 0;
+   Desc->language_code = idxlanguage_code;
+   Desc->md5sum = idxmd5sum;
 
    return Description;
 }
 									/*}}}*/
-// ListParser::NewDepends - Create a dependency element			/*{{{*/
+// CacheGenerator::FinishCache - do various finish operations		/*{{{*/
+// ---------------------------------------------------------------------
+/* This prepares the Cache for delivery */
+bool pkgCacheGenerator::FinishCache(OpProgress *Progress)
+{
+   // FIXME: add progress reporting for this operation
+   // Do we have different architectures in your groups ?
+   vector<string> archs = APT::Configuration::getArchitectures();
+   if (archs.size() > 1)
+   {
+      // Create Conflicts in between the group
+      pkgCache::GrpIterator G = GetCache().GrpBegin();
+      Dynamic<pkgCache::GrpIterator> DynG(G);
+      for (; G.end() != true; G++)
+      {
+	 string const PkgName = G.Name();
+	 pkgCache::PkgIterator P = G.PackageList();
+	 Dynamic<pkgCache::PkgIterator> DynP(P);
+	 for (; P.end() != true; P = G.NextPkg(P))
+	 {
+	    if (strcmp(P.Arch(),"all") == 0)
+	       continue;
+	    pkgCache::PkgIterator allPkg;
+	    Dynamic<pkgCache::PkgIterator> DynallPkg(allPkg);
+	    pkgCache::VerIterator V = P.VersionList();
+	    Dynamic<pkgCache::VerIterator> DynV(V);
+	    for (; V.end() != true; V++)
+	    {
+	       string const Arch = V.Arch(true);
+	       map_ptrloc *OldDepLast = NULL;
+	       /* MultiArch handling introduces a lot of implicit Dependencies:
+		- MultiArch: same → Co-Installable if they have the same version
+		- Architecture: all → Need to be Co-Installable for internal reasons
+		- All others conflict with all other group members */
+	       bool const coInstall = (V->MultiArch == pkgCache::Version::All ||
+					V->MultiArch == pkgCache::Version::Same);
+	       if (V->MultiArch == pkgCache::Version::All && allPkg.end() == true)
+		  allPkg = G.FindPkg("all");
+	       for (vector<string>::const_iterator A = archs.begin(); A != archs.end(); ++A)
+	       {
+		  if (*A == Arch)
+		     continue;
+		  /* We allow only one installed arch at the time
+		     per group, therefore each group member conflicts
+		     with all other group members */
+		  pkgCache::PkgIterator D = G.FindPkg(*A);
+		  Dynamic<pkgCache::PkgIterator> DynD(D);
+		  if (D.end() == true)
+		     continue;
+		  if (coInstall == true)
+		  {
+		     // Replaces: ${self}:other ( << ${binary:Version})
+		     NewDepends(D, V, V.VerStr(),
+				pkgCache::Dep::Less, pkgCache::Dep::Replaces,
+				OldDepLast);
+		     // Breaks: ${self}:other (!= ${binary:Version})
+		     NewDepends(D, V, V.VerStr(),
+				pkgCache::Dep::NotEquals, pkgCache::Dep::DpkgBreaks,
+				OldDepLast);
+		     if (V->MultiArch == pkgCache::Version::All)
+		     {
+			// Depend on ${self}:all which does depend on nothing
+			NewDepends(allPkg, V, V.VerStr(),
+				   pkgCache::Dep::Equals, pkgCache::Dep::Depends,
+				   OldDepLast);
+		     }
+		  } else {
+			// Conflicts: ${self}:other
+			NewDepends(D, V, "",
+				   pkgCache::Dep::NoOp, pkgCache::Dep::Conflicts,
+				   OldDepLast);
+		  }
+	       }
+	    }
+	 }
+      }
+   }
+   return true;
+}
+									/*}}}*/
+// CacheGenerator::NewDepends - Create a dependency element		/*{{{*/
 // ---------------------------------------------------------------------
 /* This creates a dependency element in the tree. It is linked to the
    version and to the package that it is pointing to. */
-bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator Ver,
-					       const string &PackageName,
-					       const string &Version,
-					       unsigned int Op,
-					       unsigned int Type)
+bool pkgCacheGenerator::NewDepends(pkgCache::PkgIterator &Pkg,
+				   pkgCache::VerIterator &Ver,
+				   string const &Version,
+				   unsigned int const &Op,
+				   unsigned int const &Type,
+				   map_ptrloc *OldDepLast)
 {
-   pkgCache &Cache = Owner->Cache;
-   
+   void const * const oldMap = Map.Data();
    // Get a structure
-   unsigned long Dependency = Owner->Map.Allocate(sizeof(pkgCache::Dependency));
-   if (Dependency == 0)
+   map_ptrloc const Dependency = AllocateInMap(sizeof(pkgCache::Dependency));
+   if (unlikely(Dependency == 0))
       return false;
    
    // Fill it in
    pkgCache::DepIterator Dep(Cache,Cache.DepP + Dependency);
+   Dynamic<pkgCache::DepIterator> DynDep(Dep);
    Dep->ParentVer = Ver.Index();
    Dep->Type = Type;
    Dep->CompareOp = Op;
    Dep->ID = Cache.HeaderP->DependsCount++;
-   
-   // Locate the target package
-   pkgCache::PkgIterator Pkg;
-   if (Owner->NewPackage(Pkg,PackageName) == false)
-      return false;
-   
+
    // Probe the reverse dependency list for a version string that matches
    if (Version.empty() == false)
    {
 /*      for (pkgCache::DepIterator I = Pkg.RevDependsList(); I.end() == false; I++)
 	 if (I->Version != 0 && I.TargetVer() == Version)
 	    Dep->Version = I->Version;*/
-      if (Dep->Version == 0)
-	 if ((Dep->Version = WriteString(Version)) == 0)
+      if (Dep->Version == 0) {
+	 map_ptrloc const index = WriteStringInMap(Version);
+	 if (unlikely(index == 0))
 	    return false;
+	 Dep->Version = index;
+      }
    }
-      
+
    // Link it to the package
    Dep->Package = Pkg.Index();
    Dep->NextRevDepends = Pkg->RevDepends;
    Pkg->RevDepends = Dep.Index();
-   
-   /* Link it to the version (at the end of the list)
-      Caching the old end point speeds up generation substantially */
-   if (OldDepVer != Ver)
+
+   // Do we know where to link the Dependency to?
+   if (OldDepLast == NULL)
    {
       OldDepLast = &Ver->DependsList;
       for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false; D++)
 	 OldDepLast = &D->NextDepends;
-      OldDepVer = Ver;
-   }
+   } else if (oldMap != Map.Data())
+      OldDepLast += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
 
-   // Is it a file dependency?
-   if (PackageName[0] == '/')
-      FoundFileDeps = true;
-   
    Dep->NextDepends = *OldDepLast;
    *OldDepLast = Dep.Index();
    OldDepLast = &Dep->NextDepends;
@@ -534,36 +758,76 @@ bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator Ver,
    return true;
 }
 									/*}}}*/
+// ListParser::NewDepends - Create the environment for a new dependency	/*{{{*/
+// ---------------------------------------------------------------------
+/* This creates a Group and the Package to link this dependency to if
+   needed and handles also the caching of the old endpoint */
+bool pkgCacheGenerator::ListParser::NewDepends(pkgCache::VerIterator &Ver,
+					       const string &PackageName,
+					       const string &Arch,
+					       const string &Version,
+					       unsigned int Op,
+					       unsigned int Type)
+{
+   pkgCache::GrpIterator Grp;
+   Dynamic<pkgCache::GrpIterator> DynGrp(Grp);
+   if (unlikely(Owner->NewGroup(Grp, PackageName) == false))
+      return false;
+
+   // Locate the target package
+   pkgCache::PkgIterator Pkg = Grp.FindPkg(Arch);
+   Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
+   if (Pkg.end() == true) {
+      if (unlikely(Owner->NewPackage(Pkg, PackageName, Arch) == false))
+	 return false;
+   }
+
+   // Is it a file dependency?
+   if (unlikely(PackageName[0] == '/'))
+      FoundFileDeps = true;
+
+   /* Caching the old end point speeds up generation substantially */
+   if (OldDepVer != Ver) {
+      OldDepLast = NULL;
+      OldDepVer = Ver;
+   }
+
+   return Owner->NewDepends(Pkg, Ver, Version, Op, Type, OldDepLast);
+}
+									/*}}}*/
 // ListParser::NewProvides - Create a Provides element			/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool pkgCacheGenerator::ListParser::NewProvides(pkgCache::VerIterator Ver,
-					        const string &PackageName,
+bool pkgCacheGenerator::ListParser::NewProvides(pkgCache::VerIterator &Ver,
+					        const string &PkgName,
+						const string &PkgArch,
 						const string &Version)
 {
    pkgCache &Cache = Owner->Cache;
 
    // We do not add self referencing provides
-   if (Ver.ParentPkg().Name() == PackageName)
+   if (Ver.ParentPkg().Name() == PkgName && PkgArch == Ver.Arch(true))
       return true;
    
    // Get a structure
-   unsigned long Provides = Owner->Map.Allocate(sizeof(pkgCache::Provides));
-   if (Provides == 0)
+   map_ptrloc const Provides = Owner->AllocateInMap(sizeof(pkgCache::Provides));
+   if (unlikely(Provides == 0))
       return false;
    Cache.HeaderP->ProvidesCount++;
    
    // Fill it in
    pkgCache::PrvIterator Prv(Cache,Cache.ProvideP + Provides,Cache.PkgP);
+   Dynamic<pkgCache::PrvIterator> DynPrv(Prv);
    Prv->Version = Ver.Index();
    Prv->NextPkgProv = Ver->ProvidesList;
    Ver->ProvidesList = Prv.Index();
-   if (Version.empty() == false && (Prv->ProvideVersion = WriteString(Version)) == 0)
+   if (Version.empty() == false && unlikely((Prv->ProvideVersion = WriteString(Version)) == 0))
       return false;
    
    // Locate the target package
    pkgCache::PkgIterator Pkg;
-   if (Owner->NewPackage(Pkg,PackageName) == false)
+   Dynamic<pkgCache::PkgIterator> DynPkg(Pkg);
+   if (unlikely(Owner->NewPackage(Pkg,PkgName, PkgArch) == false))
       return false;
    
    // Link it to the package
@@ -583,24 +847,29 @@ bool pkgCacheGenerator::SelectFile(const string &File,const string &Site,
 				   unsigned long Flags)
 {
    // Get some space for the structure
-   CurrentFile = Cache.PkgFileP + Map.Allocate(sizeof(*CurrentFile));
-   if (CurrentFile == Cache.PkgFileP)
+   map_ptrloc const idxFile = AllocateInMap(sizeof(*CurrentFile));
+   if (unlikely(idxFile == 0))
       return false;
-   
+   CurrentFile = Cache.PkgFileP + idxFile;
+
    // Fill it in
-   CurrentFile->FileName = Map.WriteString(File);
-   CurrentFile->Site = WriteUniqString(Site);
+   map_ptrloc const idxFileName = WriteStringInMap(File);
+   map_ptrloc const idxSite = WriteUniqString(Site);
+   if (unlikely(idxFileName == 0 || idxSite == 0))
+      return false;
+   CurrentFile->FileName = idxFileName;
+   CurrentFile->Site = idxSite;
    CurrentFile->NextFile = Cache.HeaderP->FileList;
    CurrentFile->Flags = Flags;
    CurrentFile->ID = Cache.HeaderP->PackageFileCount;
-   CurrentFile->IndexType = WriteUniqString(Index.GetType()->Label);
+   map_ptrloc const idxIndexType = WriteUniqString(Index.GetType()->Label);
+   if (unlikely(idxIndexType == 0))
+      return false;
+   CurrentFile->IndexType = idxIndexType;
    PkgFileName = File;
    Cache.HeaderP->FileList = CurrentFile - Cache.PkgFileP;
    Cache.HeaderP->PackageFileCount++;
 
-   if (CurrentFile->FileName == 0)
-      return false;
-   
    if (Progress != 0)
       Progress->SubProgress(Index.Size());
    return true;
@@ -640,18 +909,25 @@ unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
    }
    
    // Get a structure
-   unsigned long Item = Map.Allocate(sizeof(pkgCache::StringItem));
+   void const * const oldMap = Map.Data();
+   map_ptrloc const Item = AllocateInMap(sizeof(pkgCache::StringItem));
    if (Item == 0)
       return 0;
 
+   map_ptrloc const idxString = WriteStringInMap(S,Size);
+   if (unlikely(idxString == 0))
+      return 0;
+   if (oldMap != Map.Data()) {
+      Last += (map_ptrloc*) Map.Data() - (map_ptrloc*) oldMap;
+      I += (pkgCache::StringItem*) Map.Data() - (pkgCache::StringItem*) oldMap;
+   }
+   *Last = Item;
+
    // Fill in the structure
    pkgCache::StringItem *ItemP = Cache.StringItemP + Item;
    ItemP->NextItem = I - Cache.StringItemP;
-   *Last = Item;
-   ItemP->String = Map.WriteString(S,Size);
-   if (ItemP->String == 0)
-      return 0;
-   
+   ItemP->String = idxString;
+
    Bucket = ItemP;
    return ItemP->String;
 }
@@ -769,7 +1045,7 @@ static unsigned long ComputeSize(FileIterator Start,FileIterator End)
 // ---------------------------------------------------------------------
 /* */
 static bool BuildCache(pkgCacheGenerator &Gen,
-		       OpProgress &Progress,
+		       OpProgress *Progress,
 		       unsigned long &CurrentSize,unsigned long TotalSize,
 		       FileIterator Start, FileIterator End)
 {
@@ -790,7 +1066,8 @@ static bool BuildCache(pkgCacheGenerator &Gen,
       }
       
       unsigned long Size = (*I)->Size();
-      Progress.OverallProgress(CurrentSize,TotalSize,Size,_("Reading package lists"));
+      if (Progress != NULL)
+	 Progress->OverallProgress(CurrentSize,TotalSize,Size,_("Reading package lists"));
       CurrentSize += Size;
       
       if ((*I)->Merge(Gen,Progress) == false)
@@ -799,13 +1076,15 @@ static bool BuildCache(pkgCacheGenerator &Gen,
 
    if (Gen.HasFileDeps() == true)
    {
-      Progress.Done();
+      if (Progress != NULL)
+	 Progress->Done();
       TotalSize = ComputeSize(Start, End);
       CurrentSize = 0;
       for (I = Start; I != End; I++)
       {
 	 unsigned long Size = (*I)->Size();
-	 Progress.OverallProgress(CurrentSize,TotalSize,Size,_("Collecting File Provides"));
+	 if (Progress != NULL)
+	    Progress->OverallProgress(CurrentSize,TotalSize,Size,_("Collecting File Provides"));
 	 CurrentSize += Size;
 	 if ((*I)->MergeFileProvides(Gen,Progress) == false)
 	    return false;
@@ -815,7 +1094,21 @@ static bool BuildCache(pkgCacheGenerator &Gen,
    return true;
 }
 									/*}}}*/
-// MakeStatusCache - Construct the status cache				/*{{{*/
+// CacheGenerator::CreateDynamicMMap - load an mmap with configuration options	/*{{{*/
+DynamicMMap* pkgCacheGenerator::CreateDynamicMMap(FileFd *CacheF, unsigned long Flags) {
+   unsigned long const MapStart = _config->FindI("APT::Cache-Start", 24*1024*1024);
+   unsigned long const MapGrow = _config->FindI("APT::Cache-Grow", 1*1024*1024);
+   unsigned long const MapLimit = _config->FindI("APT::Cache-Limit", 0);
+   Flags |= MMap::Moveable;
+   if (_config->FindB("APT::Cache-Fallback", false) == true)
+      Flags |= MMap::Fallback;
+   if (CacheF != NULL)
+      return new DynamicMMap(*CacheF, Flags, MapStart, MapGrow, MapLimit);
+   else
+      return new DynamicMMap(Flags, MapStart, MapGrow, MapLimit);
+}
+									/*}}}*/
+// CacheGenerator::MakeStatusCache - Construct the status cache		/*{{{*/
 // ---------------------------------------------------------------------
 /* This makes sure that the status cache (the cache that has all 
    index files from the sources list and all local ones) is ready
@@ -823,11 +1116,13 @@ static bool BuildCache(pkgCacheGenerator &Gen,
    the cache will be stored there. This is pretty much mandetory if you
    are using AllowMem. AllowMem lets the function be run as non-root
    where it builds the cache 'fast' into a memory buffer. */
-bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
+__deprecated bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
+			MMap **OutMap, bool AllowMem)
+   { return pkgCacheGenerator::MakeStatusCache(List, &Progress, OutMap, AllowMem); }
+bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress,
 			MMap **OutMap,bool AllowMem)
 {
    bool const Debug = _config->FindB("Debug::pkgCacheGen", false);
-   unsigned long const MapSize = _config->FindI("APT::Cache-Limit",24*1024*1024);
    
    vector<pkgIndexFile *> Files;
    for (vector<metaIndex *>::const_iterator i = List.begin();
@@ -848,7 +1143,20 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    // Decide if we can write to the files..
    string const CacheFile = _config->FindFile("Dir::Cache::pkgcache");
    string const SrcCacheFile = _config->FindFile("Dir::Cache::srcpkgcache");
-   
+
+   // ensure the cache directory exists
+   if (CacheFile.empty() == false || SrcCacheFile.empty() == false)
+   {
+      string dir = _config->FindDir("Dir::Cache");
+      size_t const len = dir.size();
+      if (len > 5 && dir.find("/apt/", len - 6, 5) == len - 5)
+	 dir = dir.substr(0, len - 5);
+      if (CacheFile.empty() == false)
+	 CreateDirectory(dir, flNotFile(CacheFile));
+      if (SrcCacheFile.empty() == false)
+	 CreateDirectory(dir, flNotFile(SrcCacheFile));
+   }
+
    // Decide if we can write to the cache
    bool Writeable = false;
    if (CacheFile.empty() == false)
@@ -861,13 +1169,15 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
 
    if (Writeable == false && AllowMem == false && CacheFile.empty() == false)
       return _error->Error(_("Unable to write to %s"),flNotFile(CacheFile).c_str());
-   
-   Progress.OverallProgress(0,1,1,_("Reading package lists"));
-   
+
+   if (Progress != NULL)
+      Progress->OverallProgress(0,1,1,_("Reading package lists"));
+
    // Cache is OK, Fin.
    if (CheckValidity(CacheFile,Files.begin(),Files.end(),OutMap) == true)
    {
-      Progress.OverallProgress(1,1,1,_("Reading package lists"));
+      if (Progress != NULL)
+	 Progress->OverallProgress(1,1,1,_("Reading package lists"));
       if (Debug == true)
 	 std::clog << "pkgcache.bin is valid - no need to build anything" << std::endl;
       return true;
@@ -882,9 +1192,9 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    if (Writeable == true && CacheFile.empty() == false)
    {
       unlink(CacheFile.c_str());
-      CacheF = new FileFd(CacheFile,FileFd::WriteEmpty);
+      CacheF = new FileFd(CacheFile,FileFd::WriteAtomic);
       fchmod(CacheF->Fd(),0644);
-      Map = new DynamicMMap(*CacheF,MMap::Public,MapSize);
+      Map = CreateDynamicMMap(CacheF, MMap::Public);
       if (_error->PendingError() == true)
 	 return false;
       if (Debug == true)
@@ -893,7 +1203,7 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    else
    {
       // Just build it in memory..
-      Map = new DynamicMMap(0,MapSize);
+      Map = CreateDynamicMMap(NULL);
       if (Debug == true)
 	 std::clog << "Open memory Map (not filebased)" << std::endl;
    }
@@ -917,12 +1227,15 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
       TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
 
       // Build the status cache
-      pkgCacheGenerator Gen(Map.Get(),&Progress);
+      pkgCacheGenerator Gen(Map.Get(),Progress);
       if (_error->PendingError() == true)
 	 return false;
       if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
 		     Files.begin()+EndOfSource,Files.end()) == false)
 	 return false;
+
+      // FIXME: move me to a better place
+      Gen.FinishCache(Progress);
    }
    else
    {
@@ -931,7 +1244,7 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
       TotalSize = ComputeSize(Files.begin(),Files.end());
       
       // Build the source cache
-      pkgCacheGenerator Gen(Map.Get(),&Progress);
+      pkgCacheGenerator Gen(Map.Get(),Progress);
       if (_error->PendingError() == true)
 	 return false;
       if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
@@ -941,7 +1254,7 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
       // Write it back
       if (Writeable == true && SrcCacheFile.empty() == false)
       {
-	 FileFd SCacheF(SrcCacheFile,FileFd::WriteEmpty);
+	 FileFd SCacheF(SrcCacheFile,FileFd::WriteAtomic);
 	 if (_error->PendingError() == true)
 	    return false;
 	 
@@ -965,6 +1278,9 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
       if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
 		     Files.begin()+EndOfSource,Files.end()) == false)
 	 return false;
+
+      // FIXME: move me to a better place
+      Gen.FinishCache(Progress);
    }
    if (Debug == true)
       std::clog << "Caches are ready for shipping" << std::endl;
@@ -987,32 +1303,37 @@ bool pkgMakeStatusCache(pkgSourceList &List,OpProgress &Progress,
    return true;
 }
 									/*}}}*/
-// MakeOnlyStatusCache - Build a cache with just the status files	/*{{{*/
+// CacheGenerator::MakeOnlyStatusCache - Build only a status files cache/*{{{*/
 // ---------------------------------------------------------------------
 /* */
-bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap)
+__deprecated bool pkgMakeOnlyStatusCache(OpProgress &Progress,DynamicMMap **OutMap)
+   { return pkgCacheGenerator::MakeOnlyStatusCache(&Progress, OutMap); }
+bool pkgCacheGenerator::MakeOnlyStatusCache(OpProgress *Progress,DynamicMMap **OutMap)
 {
-   unsigned long MapSize = _config->FindI("APT::Cache-Limit",20*1024*1024);
    vector<pkgIndexFile *> Files;
    unsigned long EndOfSource = Files.size();
    if (_system->AddStatusFiles(Files) == false)
       return false;
-   
-   SPtr<DynamicMMap> Map = new DynamicMMap(0,MapSize);
+
+   SPtr<DynamicMMap> Map = CreateDynamicMMap(NULL);
    unsigned long CurrentSize = 0;
    unsigned long TotalSize = 0;
    
    TotalSize = ComputeSize(Files.begin()+EndOfSource,Files.end());
    
    // Build the status cache
-   Progress.OverallProgress(0,1,1,_("Reading package lists"));
-   pkgCacheGenerator Gen(Map.Get(),&Progress);
+   if (Progress != NULL)
+      Progress->OverallProgress(0,1,1,_("Reading package lists"));
+   pkgCacheGenerator Gen(Map.Get(),Progress);
    if (_error->PendingError() == true)
       return false;
    if (BuildCache(Gen,Progress,CurrentSize,TotalSize,
 		  Files.begin()+EndOfSource,Files.end()) == false)
       return false;
-   
+
+   // FIXME: move me to a better place
+   Gen.FinishCache(Progress);
+
    if (_error->PendingError() == true)
       return false;
    *OutMap = Map.UnGuard();