Adding upstream version 2.7.12.upstream/2.7.12

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

41 files changed, 8431 insertions, 0 deletions

diff --git a/apt-private/CMakeLists.txt b/apt-private/CMakeLists.txt
new file mode 100644
index 0000000..88a8f97
--- /dev/null
+++ b/apt-private/CMakeLists.txt
@@ -0,0 +1,26 @@
+# Set the version of the library
+set(MAJOR 0.0)
+set(MINOR 0)
+
+# Definition of the C++ files used to build the library - note that this
+# is expanded at CMake time, so you have to rerun cmake if you add or remove
+# a file (you can just run cmake . in the build directory)
+file(GLOB_RECURSE library "*.cc")
+file(GLOB_RECURSE headers "*.h")
+
+# Create a library using the C++ files
+add_library(apt-private SHARED ${library})
+
+# Link the library and set the SONAME
+target_link_libraries(apt-private PUBLIC apt-pkg)
+set_target_properties(apt-private PROPERTIES VERSION ${MAJOR}.${MINOR})
+set_target_properties(apt-private PROPERTIES SOVERSION ${MAJOR})
+set_target_properties(apt-private PROPERTIES CXX_VISIBILITY_PRESET hidden)
+add_version_script(apt-private)
+
+# Install the library and the headers
+install(TARGETS apt-private
+        LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        NAMELINK_SKIP)
+
+flatify(${PROJECT_BINARY_DIR}/include/apt-private/ "${headers}")
diff --git a/apt-private/acqprogress.cc b/apt-private/acqprogress.cc
new file mode 100644
index 0000000..1f5acdd
--- /dev/null
+++ b/apt-private/acqprogress.cc
@@ -0,0 +1,368 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   Acquire Progress - Command line progress meter
+
+   ##################################################################### */
+									/*}}}*/
+// Include files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/acquire-worker.h>
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/acqprogress.h>
+#include <apt-private/private-output.h>
+
+#include <csignal>
+#include <cstdio>
+#include <cstring>
+#include <iostream>
+#include <sstream>
+#include <unistd.h>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// AcqTextStatus::AcqTextStatus - Constructor				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+AcqTextStatus::AcqTextStatus(std::ostream &out, unsigned int &ScreenWidth,unsigned int const Quiet) :
+    pkgAcquireStatus(), out(out), ScreenWidth(ScreenWidth), LastLineLength(0), ID(0), Quiet(Quiet)
+{
+   // testcases use it to disable pulses without disabling other user messages
+   if (Quiet == 0 && _config->FindB("quiet::NoUpdate", false) == true)
+      this->Quiet = 1;
+   if (Quiet < 2 && _config->FindB("quiet::NoProgress", false) == true)
+      this->Quiet = 2;
+}
+									/*}}}*/
+// AcqTextStatus::Start - Downloading has started			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void AcqTextStatus::Start()
+{
+   pkgAcquireStatus::Start();
+   LastLineLength = 0;
+   ID = 1;
+}
+									/*}}}*/
+void AcqTextStatus::AssignItemID(pkgAcquire::ItemDesc &Itm)		/*{{{*/
+{
+   /* In theory calling it from Fetch() would be enough, but to be
+      safe we call it from IMSHit and Fail as well.
+      Also, an Item can pass through multiple stages, so ensure
+      that it keeps the same number */
+   if (Itm.Owner->ID == 0)
+      Itm.Owner->ID = ID++;
+}
+									/*}}}*/
+// AcqTextStatus::IMSHit - Called when an item got a HIT response	/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void AcqTextStatus::IMSHit(pkgAcquire::ItemDesc &Itm)
+{
+   if (Quiet > 1)
+      return;
+
+   AssignItemID(Itm);
+   clearLastLine();
+
+   // TRANSLATOR: Very short word to be displayed before unchanged files in 'apt-get update'
+   ioprintf(out, _("Hit:%lu %s"), Itm.Owner->ID, Itm.Description.c_str());
+   out << std::endl;
+   Update = true;
+}
+									/*}}}*/
+// AcqTextStatus::Fetch - An item has started to download		/*{{{*/
+// ---------------------------------------------------------------------
+/* This prints out the short description and the expected size */
+void AcqTextStatus::Fetch(pkgAcquire::ItemDesc &Itm)
+{
+   Update = true;
+   if (Itm.Owner->Complete == true)
+      return;
+   AssignItemID(Itm);
+
+   if (Quiet > 1)
+      return;
+
+   clearLastLine();
+
+   // TRANSLATOR: Very short word to be displayed for files processed in 'apt-get update'
+   // Potentially replaced later by "Hit:", "Ign:" or "Err:" if something (bad) happens
+   ioprintf(out, _("Get:%lu %s"), Itm.Owner->ID, Itm.Description.c_str());
+   if (Itm.Owner->FileSize != 0)
+      out << " [" << SizeToStr(Itm.Owner->FileSize) << "B]";
+   out << std::endl;
+}
+									/*}}}*/
+// AcqTextStatus::Done - Completed a download				/*{{{*/
+// ---------------------------------------------------------------------
+/* We don't display anything... */
+void AcqTextStatus::Done(pkgAcquire::ItemDesc &Itm)
+{
+   Update = true;
+   AssignItemID(Itm);
+}
+									/*}}}*/
+// AcqTextStatus::Fail - Called when an item fails to download		/*{{{*/
+// ---------------------------------------------------------------------
+/* We print out the error text  */
+void AcqTextStatus::Fail(pkgAcquire::ItemDesc &Itm)
+{
+   if (Quiet > 1)
+      return;
+
+   AssignItemID(Itm);
+   clearLastLine();
+
+   bool ShowErrorText = true;
+   if (Itm.Owner->Status == pkgAcquire::Item::StatDone || Itm.Owner->Status == pkgAcquire::Item::StatIdle)
+   {
+      // TRANSLATOR: Very short word to be displayed for files in 'apt-get update'
+      // which failed to download, but the error is ignored (compare "Err:")
+      ioprintf(out, _("Ign:%lu %s"), Itm.Owner->ID, Itm.Description.c_str());
+      if (Itm.Owner->ErrorText.empty() ||
+	    _config->FindB("Acquire::Progress::Ignore::ShowErrorText", false) == false)
+	 ShowErrorText = false;
+   }
+   else
+   {
+      // TRANSLATOR: Very short word to be displayed for files in 'apt-get update'
+      // which failed to download and the error is critical (compare "Ign:")
+      ioprintf(out, _("Err:%lu %s"), Itm.Owner->ID, Itm.Description.c_str());
+   }
+
+   if (ShowErrorText)
+   {
+      std::string::size_type line_start = 0;
+      std::string::size_type line_end;
+      while ((line_end = Itm.Owner->ErrorText.find_first_of("\n\r", line_start)) != std::string::npos) {
+	 out << std::endl << "  " << Itm.Owner->ErrorText.substr(line_start, line_end - line_start);
+	 line_start = Itm.Owner->ErrorText.find_first_not_of("\n\r", line_end + 1);
+	 if (line_start == std::string::npos)
+	    break;
+      }
+      if (line_start == 0)
+	 out << std::endl << "  " << Itm.Owner->ErrorText;
+      else if (line_start != std::string::npos)
+	 out << std::endl << "  " << Itm.Owner->ErrorText.substr(line_start);
+   }
+   out << std::endl;
+
+   Update = true;
+}
+									/*}}}*/
+// AcqTextStatus::Stop - Finished downloading				/*{{{*/
+// ---------------------------------------------------------------------
+/* This prints out the bytes downloaded and the overall average line
+   speed */
+void AcqTextStatus::Stop()
+{
+   pkgAcquireStatus::Stop();
+   if (Quiet > 1)
+      return;
+
+   clearLastLine();
+
+   if (_config->FindB("quiet::NoStatistic", false) == true)
+      return;
+
+   if (FetchedBytes != 0 && _error->PendingError() == false)
+      ioprintf(out,_("Fetched %sB in %s (%sB/s)\n"),
+	       SizeToStr(FetchedBytes).c_str(),
+	       TimeToStr(ElapsedTime).c_str(),
+	       SizeToStr(CurrentCPS).c_str());
+}
+									/*}}}*/
+// AcqTextStatus::Pulse - Regular event pulse				/*{{{*/
+// ---------------------------------------------------------------------
+/* This draws the current progress. Each line has an overall percent
+   meter and a per active item status meter along with an overall
+   bandwidth and ETA indicator. */
+bool AcqTextStatus::Pulse(pkgAcquire *Owner)
+{
+   pkgAcquireStatus::Pulse(Owner);
+
+   if (Quiet > 0)
+      return true;
+
+   std::string Line;
+   {
+      std::stringstream S;
+      for (pkgAcquire::Worker *I = Owner->WorkersBegin(); I != 0;
+	    I = Owner->WorkerStep(I))
+      {
+	 // There is no item running
+	 if (I->CurrentItem == 0)
+	 {
+	    if (I->Status.empty() == false)
+	       S << " [" << I->Status << "]";
+
+	    continue;
+	 }
+
+	 // Add in the short description
+	 S << " [";
+	 if (I->CurrentItem->Owner->ID != 0)
+	    S << std::to_string(I->CurrentItem->Owner->ID) << " ";
+	 S << I->CurrentItem->ShortDesc;
+
+	 // Show the short mode string
+	 if (I->CurrentItem->Owner->ActiveSubprocess.empty() == false)
+	    S << " " << I->CurrentItem->Owner->ActiveSubprocess;
+
+	 enum {Long = 0,Medium,Short} Mode = Medium;
+	 // Add the current progress
+	 if (Mode == Long)
+	    S << " " << std::to_string(I->CurrentItem->CurrentSize);
+	 else
+	 {
+	    if (Mode == Medium || I->CurrentItem->TotalSize == 0)
+	       S << " " << SizeToStr(I->CurrentItem->CurrentSize) << "B";
+	 }
+
+	 // Add the total size and percent
+	 if (I->CurrentItem->TotalSize > 0 && I->CurrentItem->Owner->Complete == false)
+	 {
+	    if (Mode == Short)
+	       ioprintf(S, " %.0f%%", (I->CurrentItem->CurrentSize*100.0)/I->CurrentItem->TotalSize);
+	    else
+	       ioprintf(S, "/%sB %.0f%%", SizeToStr(I->CurrentItem->TotalSize).c_str(),
+		     (I->CurrentItem->CurrentSize*100.0)/I->CurrentItem->TotalSize);
+	 }
+	 S << "]";
+      }
+
+      // Show at least something
+      Line = S.str();
+      S.clear();
+      if (Line.empty() == true)
+	 Line = _(" [Working]");
+   }
+   // Put in the percent done
+   {
+      std::stringstream S;
+      ioprintf(S, "%.0f%%", Percent);
+      S << Line;
+      Line = S.str();
+      S.clear();
+   }
+
+   /* Put in the ETA and cps meter, block off signals to prevent strangeness
+      during resizing */
+   sigset_t Sigs,OldSigs;
+   sigemptyset(&Sigs);
+   sigaddset(&Sigs,SIGWINCH);
+   sigprocmask(SIG_BLOCK,&Sigs,&OldSigs);
+
+   if (CurrentCPS != 0)
+   {
+      unsigned long long ETA = (TotalBytes - CurrentBytes)/CurrentCPS;
+      std::string Tmp = " " + SizeToStr(CurrentCPS) + "B/s " + TimeToStr(ETA);
+      size_t alignment = Line.length() + Tmp.length();
+      if (alignment < ScreenWidth)
+      {
+	 alignment = ScreenWidth - alignment;
+	 for (size_t i = 0; i < alignment; ++i)
+	    Line.append(" ");
+	 Line.append(Tmp);
+      }
+   }
+   if (Line.length() > ScreenWidth)
+      Line.erase(ScreenWidth);
+   sigprocmask(SIG_SETMASK,&OldSigs,0);
+
+   // Draw the current status
+   if (_config->FindB("Apt::Color", false) == true)
+      out << _config->Find("APT::Color::Yellow");
+   if (LastLineLength > Line.length())
+      clearLastLine();
+   else
+      out << '\r';
+   out << Line << std::flush;
+   if (_config->FindB("Apt::Color", false) == true)
+      out << _config->Find("APT::Color::Neutral") << std::flush;
+
+   LastLineLength = Line.length();
+   Update = false;
+
+   return true;
+}
+									/*}}}*/
+// AcqTextStatus::MediaChange - Media need to be swapped		/*{{{*/
+// ---------------------------------------------------------------------
+/* Prompt for a media swap */
+bool AcqTextStatus::MediaChange(std::string Media, std::string Drive)
+{
+   // If we do not output on a terminal and one of the options to avoid user
+   // interaction is given, we assume that no user is present who could react
+   // on your media change request
+   if (isatty(STDOUT_FILENO) != 1 && Quiet >= 2 &&
+       (_config->FindB("APT::Get::Assume-Yes",false) == true ||
+	_config->FindB("APT::Get::Force-Yes",false) == true ||
+	_config->FindB("APT::Get::Trivial-Only",false) == true))
+
+      return false;
+
+   clearLastLine();
+   ioprintf(out,_("Media change: please insert the disc labeled\n"
+		   " '%s'\n"
+		   "in the drive '%s' and press [Enter]\n"),
+	    Media.c_str(),Drive.c_str());
+
+   char C = 0;
+   bool bStatus = true;
+   while (C != '\n' && C != '\r')
+   {
+      int len = read(STDIN_FILENO,&C,1);
+      if(C == 'c' || len <= 0) {
+	 bStatus = false;
+	 break;
+      }
+   }
+
+   if(bStatus)
+      Update = true;
+   return bStatus;
+}
+									/*}}}*/
+bool AcqTextStatus::ReleaseInfoChanges(metaIndex const * const L, metaIndex const * const N, std::vector<ReleaseInfoChange> &&Changes)/*{{{*/
+{
+   if (Quiet >= 2 || isatty(STDOUT_FILENO) != 1 || isatty(STDIN_FILENO) != 1 ||
+	 _config->FindB("APT::Get::Update::InteractiveReleaseInfoChanges", false) == false)
+      return pkgAcquireStatus::ReleaseInfoChanges(nullptr, nullptr, std::move(Changes));
+
+   _error->PushToStack();
+   auto const confirmed = pkgAcquireStatus::ReleaseInfoChanges(L, N, std::move(Changes));
+   if (confirmed == true)
+   {
+      _error->MergeWithStack();
+      return true;
+   }
+   clearLastLine();
+   _error->DumpErrors(out, GlobalError::NOTICE, false);
+   _error->RevertToStack();
+   return YnPrompt(_("Do you want to accept these changes and continue updating from this repository?"), false, false, out, out);
+}
+									/*}}}*/
+void AcqTextStatus::clearLastLine() {					/*{{{*/
+   if (Quiet > 0 || LastLineLength == 0)
+      return;
+
+   // do not try to clear more than the (now smaller) screen
+   if (LastLineLength > ScreenWidth)
+      LastLineLength = ScreenWidth;
+
+   out << '\r';
+   for (size_t i = 0; i < LastLineLength; ++i)
+      out << ' ';
+   out << '\r' << std::flush;
+}
+									/*}}}*/
diff --git a/apt-private/acqprogress.h b/apt-private/acqprogress.h
new file mode 100644
index 0000000..87b957e
--- /dev/null
+++ b/apt-private/acqprogress.h
@@ -0,0 +1,45 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   Acquire Progress - Command line progress meter
+
+   ##################################################################### */
+									/*}}}*/
+#ifndef ACQPROGRESS_H
+#define ACQPROGRESS_H
+
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/macros.h>
+
+#include <iostream>
+#include <string>
+
+class APT_PUBLIC AcqTextStatus : public pkgAcquireStatus
+{
+   std::ostream &out;
+   unsigned int &ScreenWidth;
+   size_t LastLineLength;
+   unsigned long ID;
+   unsigned long Quiet;
+
+   APT_HIDDEN void clearLastLine();
+   APT_HIDDEN void AssignItemID(pkgAcquire::ItemDesc &Itm);
+
+   public:
+
+   virtual bool ReleaseInfoChanges(metaIndex const * const LastRelease, metaIndex const * const CurrentRelease, std::vector<ReleaseInfoChange> &&Changes) APT_OVERRIDE;
+   virtual bool MediaChange(std::string Media,std::string Drive) APT_OVERRIDE;
+   virtual void IMSHit(pkgAcquire::ItemDesc &Itm) APT_OVERRIDE;
+   virtual void Fetch(pkgAcquire::ItemDesc &Itm) APT_OVERRIDE;
+   virtual void Done(pkgAcquire::ItemDesc &Itm) APT_OVERRIDE;
+   virtual void Fail(pkgAcquire::ItemDesc &Itm) APT_OVERRIDE;
+   virtual void Start() APT_OVERRIDE;
+   virtual void Stop() APT_OVERRIDE;
+
+   bool Pulse(pkgAcquire *Owner) APT_OVERRIDE;
+
+   AcqTextStatus(std::ostream &out, unsigned int &ScreenWidth,unsigned int const Quiet);
+};
+
+#endif
diff --git a/apt-private/private-cachefile.cc b/apt-private/private-cachefile.cc
new file mode 100644
index 0000000..d46f2ac
--- /dev/null
+++ b/apt-private/private-cachefile.cc
@@ -0,0 +1,118 @@
+// Include files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/upgrade.h>
+
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-output.h>
+
+#include <cstdlib>
+#include <cstring>
+#include <ostream>
+
+#include <apti18n.h>
+									/*}}}*/
+
+using namespace std;
+
+static bool SortPackagesByName(pkgCache * const Owner,
+      map_pointer<pkgCache::Group> const A, map_pointer<pkgCache::Group> const B)
+{
+   if (A == 0)
+      return false;
+   if (B == 0 || A == B)
+      return true;
+   pkgCache::Group const * const GA = Owner->GrpP + A;
+   pkgCache::Group const * const GB = Owner->GrpP + B;
+   return strcmp(Owner->StrP + GA->Name, Owner->StrP + GB->Name) <= 0;
+}
+SortedPackageUniverse::SortedPackageUniverse(CacheFile &Cache) :
+      PackageUniverse{Cache}, List(Cache.UniverseList)
+{
+}
+void SortedPackageUniverse::LazyInit() const
+{
+   if (List.empty() == false)
+      return;
+   pkgCache * const Owner = data();
+   // In Multi-Arch systems Grps are easier to sort than Pkgs
+   std::vector<map_pointer<pkgCache::Group>> GrpList;
+   List.reserve(Owner->Head().GroupCount);
+   for (pkgCache::GrpIterator I{Owner->GrpBegin()}; I.end() != true; ++I)
+      GrpList.emplace_back(I - Owner->GrpP);
+   std::stable_sort(GrpList.begin(), GrpList.end(), std::bind( &SortPackagesByName, Owner, std::placeholders::_1, std::placeholders::_2 ));
+   List.reserve(Owner->Head().PackageCount);
+   for (auto G : GrpList)
+   {
+      pkgCache::GrpIterator const Grp(*Owner, Owner->GrpP + G);
+      for (pkgCache::PkgIterator P = Grp.PackageList(); P.end() != true; P = Grp.NextPkg(P))
+	 List.emplace_back(P - Owner->PkgP);
+   }
+}
+// CacheFile::CheckDeps - Open the cache file				/*{{{*/
+// ---------------------------------------------------------------------
+/* This routine generates the caches and then opens the dependency cache
+   and verifies that the system is OK. */
+bool CacheFile::CheckDeps(bool AllowBroken)
+{
+   bool FixBroken = _config->FindB("APT::Get::Fix-Broken",false);
+
+   if (_error->PendingError() == true)
+      return false;
+
+   // Check that the system is OK
+   if (DCache->DelCount() != 0 || DCache->InstCount() != 0)
+      return _error->Error("Internal error, non-zero counts");
+   
+   // Apply corrections for half-installed packages
+   if (pkgApplyStatus(*DCache) == false)
+      return false;
+   
+   if (_config->FindB("APT::Get::Fix-Policy-Broken",false) == true)
+   {
+      FixBroken = true;
+      if ((DCache->PolicyBrokenCount() > 0))
+      {
+	 // upgrade all policy-broken packages with ForceImportantDeps=True
+	 for (pkgCache::PkgIterator I = Cache->PkgBegin(); !I.end(); ++I)
+	    if ((*DCache)[I].NowPolicyBroken() == true) 
+	       DCache->MarkInstall(I,true,0, false, true);
+      }
+   }
+
+   // Nothing is broken
+   if (DCache->BrokenCount() == 0 || AllowBroken == true)
+      return true;
+
+   // Attempt to fix broken things
+   if (FixBroken == true)
+   {
+      c1out << _("Correcting dependencies...") << flush;
+      if (pkgFixBroken(*DCache) == false || DCache->BrokenCount() != 0)
+      {
+	 c1out << _(" failed.") << endl;
+	 ShowBroken(c1out,*this,true);
+
+	 return _error->Error(_("Unable to correct dependencies"));
+      }
+      if (pkgMinimizeUpgrade(*DCache) == false)
+	 return _error->Error(_("Unable to minimize the upgrade set"));
+      
+      c1out << _(" Done") << endl;
+   }
+   else
+   {
+      c1out << _("You might want to run 'apt --fix-broken install' to correct these.") << endl;
+      ShowBroken(c1out,*this,true);
+      return _error->Error(_("Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution)."));
+   }
+      
+   return true;
+}
+									/*}}}*/
diff --git a/apt-private/private-cachefile.h b/apt-private/private-cachefile.h
new file mode 100644
index 0000000..ccd4710
--- /dev/null
+++ b/apt-private/private-cachefile.h
@@ -0,0 +1,72 @@
+#ifndef APT_PRIVATE_CACHEFILE_H
+#define APT_PRIVATE_CACHEFILE_H
+
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/progress.h>
+#include <apt-pkg/sourcelist.h>
+
+// class CacheFile - Cover class for some dependency cache functions	/*{{{*/
+class APT_PUBLIC CacheFile : public pkgCacheFile
+{
+   public:
+   std::vector<map_pointer<pkgCache::Package>> UniverseList;
+
+   bool CheckDeps(bool AllowBroken = false);
+   bool BuildCaches(bool WithLock = true)
+   {
+      OpTextProgress Prog(*_config);
+      if (pkgCacheFile::BuildCaches(&Prog,WithLock) == false)
+	 return false;
+      return true;
+   }
+   bool Open(bool WithLock = true)
+   {
+      OpTextProgress Prog(*_config);
+      return pkgCacheFile::Open(&Prog,WithLock);
+   };
+   bool OpenForInstall()
+   {
+      if (_config->FindB("APT::Get::Print-URIs") == true)
+	 return Open(false);
+      else
+	 return Open(true);
+   }
+};
+									/*}}}*/
+
+class SortedPackageUniverse : public APT::PackageUniverse
+{
+   std::vector<map_pointer<pkgCache::Package>> &List;
+   void LazyInit() const;
+
+public:
+   explicit SortedPackageUniverse(CacheFile &Cache);
+
+   class const_iterator : public APT::Container_iterator_base<APT::PackageContainerInterface, SortedPackageUniverse, SortedPackageUniverse::const_iterator, std::vector<map_pointer<pkgCache::Package>>::const_iterator, pkgCache::PkgIterator>
+   {
+      pkgCache * const Cache;
+      public:
+	 inline pkgCache::PkgIterator getType(void) const
+	 {
+	    if (*_iter == 0) return pkgCache::PkgIterator(*Cache);
+	    return pkgCache::PkgIterator(*Cache, Cache->PkgP + *_iter);
+	 }
+	 explicit const_iterator(pkgCache * const Owner, std::vector<map_pointer<pkgCache::Package>>::const_iterator i):
+	    Container_iterator_base<APT::PackageContainerInterface, SortedPackageUniverse, SortedPackageUniverse::const_iterator, std::vector<map_pointer<pkgCache::Package>>::const_iterator, pkgCache::PkgIterator>(i), Cache(Owner) {}
+
+   };
+   typedef const_iterator iterator;
+
+   const_iterator begin() const { LazyInit(); return const_iterator(data(), List.begin()); }
+   const_iterator end() const { LazyInit(); return const_iterator(data(), List.end()); }
+   const_iterator cbegin() const { LazyInit(); return const_iterator(data(), List.begin()); }
+   const_iterator cend() const { LazyInit(); return const_iterator(data(), List.end()); }
+   iterator begin() { LazyInit(); return iterator(data(), List.begin()); }
+   iterator end() { LazyInit(); return iterator(data(), List.end()); }
+};
+
+#endif
diff --git a/apt-private/private-cacheset.cc b/apt-private/private-cacheset.cc
new file mode 100644
index 0000000..bd8f629
--- /dev/null
+++ b/apt-private/private-cacheset.cc
@@ -0,0 +1,505 @@
+#include <config.h>
+
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cachefilter.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/policy.h>
+#include <apt-pkg/progress.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-cacheset.h>
+
+#include <cstddef>
+
+#include <apti18n.h>
+
+bool GetLocalitySortedVersionSet(pkgCacheFile &CacheFile,		/*{{{*/
+                                 APT::VersionContainerInterface * const vci,
+                                 OpProgress * const progress)
+{
+    Matcher null_matcher = Matcher();
+    return GetLocalitySortedVersionSet(CacheFile, vci,
+                                       null_matcher, progress);
+}
+bool GetLocalitySortedVersionSet(pkgCacheFile &CacheFile,
+                                 APT::VersionContainerInterface * const vci,
+                                 Matcher &matcher,
+                                 OpProgress * const progress)
+{
+   pkgCache * const Cache = CacheFile.GetPkgCache();
+   if (unlikely(Cache == nullptr))
+      return false;
+   if (progress != nullptr)
+      progress->SubProgress(Cache->Head().PackageCount, _("Sorting"));
+
+   pkgDepCache * const DepCache = CacheFile.GetDepCache();
+   if (unlikely(DepCache == nullptr))
+      return false;
+   APT::CacheSetHelper helper(false);
+
+   int Done=0;
+
+   bool const insertCurrentVer = _config->FindB("APT::Cmd::Installed", false);
+   bool const insertUpgradable = _config->FindB("APT::Cmd::Upgradable", false);
+   bool const insertManualInstalled = _config->FindB("APT::Cmd::Manual-Installed", false);
+
+   for (pkgCache::PkgIterator P = Cache->PkgBegin(); P.end() == false; ++P)
+   {
+      if (progress != NULL)
+      {
+	 if (Done % 500 == 0)
+	    progress->Progress(Done);
+	 ++Done;
+      }
+
+      // exclude virtual pkgs
+      if (P->VersionList == 0)
+	 continue;
+
+      if ((matcher)(P) == false)
+	 continue;
+
+      pkgDepCache::StateCache &state = (*DepCache)[P];
+      if (insertCurrentVer == true)
+      {
+	 if (P->CurrentVer != 0)
+	    vci->FromPackage(vci, CacheFile, P, APT::CacheSetHelper::INSTALLED, helper);
+      }
+      else if (insertUpgradable == true)
+      {
+	 if(P.CurrentVer() && state.Upgradable())
+	    vci->FromPackage(vci, CacheFile, P, APT::CacheSetHelper::CANDIDATE, helper);
+      }
+      else if (insertManualInstalled == true)
+      {
+	 if (P.CurrentVer() &&
+	       ((*DepCache)[P].Flags & pkgCache::Flag::Auto) == false)
+	    vci->FromPackage(vci, CacheFile, P, APT::CacheSetHelper::CANDIDATE, helper);
+      }
+      else
+      {
+         if (vci->FromPackage(vci, CacheFile, P, APT::CacheSetHelper::CANDIDATE, helper) == false)
+	 {
+	    // no candidate, this may happen for packages in
+	    // dpkg "deinstall ok config-file" state - we pick the first ver
+	    // (which should be the only one)
+	    vci->insert(P.VersionList());
+	 }
+      }
+   }
+   if (progress != NULL)
+      progress->Done();
+   return true;
+}
+									/*}}}*/
+
+// CacheSetHelper saving virtual packages				/*{{{*/
+pkgCache::VerIterator CacheSetHelperVirtuals::canNotGetVersion(
+      enum CacheSetHelper::VerSelector const select,
+      pkgCacheFile &Cache,
+      pkgCache::PkgIterator const &Pkg)
+{
+   switch (select)
+   {
+      case VERSIONNUMBER:
+      case RELEASE:
+      case INSTALLED:
+      case CANDIDATE:
+      case NEWEST:
+      case ALL:
+	 virtualPkgs.insert(Pkg);
+	 break;
+      case CANDANDINST:
+      case CANDINST:
+      case INSTCAND:
+	 break;
+   }
+   return CacheSetHelper::canNotGetVersion(select, Cache, Pkg);
+}
+void CacheSetHelperVirtuals::canNotFindVersion(
+      enum CacheSetHelper::VerSelector const select,
+      APT::VersionContainerInterface * vci,
+      pkgCacheFile &Cache,
+      pkgCache::PkgIterator const &Pkg)
+{
+   if (select == NEWEST || select == CANDIDATE || select == ALL)
+      virtualPkgs.insert(Pkg);
+   return CacheSetHelper::canNotFindVersion(select, vci, Cache, Pkg);
+}
+static pkgCache::PkgIterator canNotFindPkgName_impl(pkgCacheFile &Cache, std::string const &str)
+{
+   std::string pkg = str;
+   size_t const archfound = pkg.find_last_of(':');
+   std::string arch;
+   if (archfound != std::string::npos) {
+      arch = pkg.substr(archfound+1);
+      pkg.erase(archfound);
+      if (arch == "all" || arch == "native")
+	 arch = _config->Find("APT::Architecture");
+   }
+
+   // If we don't find 'foo:amd64' look for 'foo:amd64:any'.
+   // Note: we prepare for an error here as if foo:amd64 does not exist,
+   // but foo:amd64:any it means that this package is only referenced in a
+   // (architecture specific) dependency. We do not add to virtualPkgs directly
+   // as we can't decide from here which error message has to be printed.
+   // FIXME: This doesn't match 'barbarian' architectures
+   pkgCache::PkgIterator Pkg(Cache, 0);
+   std::vector<std::string> const archs = APT::Configuration::getArchitectures();
+   if (archfound == std::string::npos)
+   {
+      for (auto const &a : archs)
+      {
+	 Pkg = Cache.GetPkgCache()->FindPkg(pkg + ':' + a, "any");
+	 if (Pkg.end() == false && Pkg->ProvidesList != 0)
+	    break;
+      }
+      if (Pkg.end() == true)
+	 for (auto const &a : archs)
+	 {
+	    Pkg = Cache.GetPkgCache()->FindPkg(pkg + ':' + a, "any");
+	    if (Pkg.end() == false)
+	       break;
+	 }
+   }
+   else
+   {
+      Pkg = Cache.GetPkgCache()->FindPkg(pkg + ':' + arch, "any");
+      if (Pkg.end() == true)
+      {
+	 APT::CacheFilter::PackageArchitectureMatchesSpecification pams(arch);
+	 for (auto const &a : archs)
+	 {
+	    if (pams(a.c_str()) == false)
+	       continue;
+	    Pkg = Cache.GetPkgCache()->FindPkg(pkg + ':' + a, "any");
+	    if (Pkg.end() == false)
+	       break;
+	 }
+      }
+   }
+   return Pkg;
+}
+pkgCache::PkgIterator CacheSetHelperVirtuals::canNotFindPkgName(pkgCacheFile &Cache, std::string const &str)
+{
+   pkgCache::PkgIterator const Pkg = canNotFindPkgName_impl(Cache, str);
+   if (Pkg.end())
+      return APT::CacheSetHelper::canNotFindPkgName(Cache, str);
+   return Pkg;
+}
+CacheSetHelperVirtuals::CacheSetHelperVirtuals(bool const ShowErrors, GlobalError::MsgType const &ErrorType) :
+   CacheSetHelper{ShowErrors, ErrorType}
+{}
+									/*}}}*/
+
+// CacheSetHelperAPTGet - responsible for message telling from the CacheSets/*{{{*/
+CacheSetHelperAPTGet::CacheSetHelperAPTGet(std::ostream &pout) :
+   APT::CacheSetHelper{true}, out(pout)
+{
+   explicitlyNamed = true;
+}
+void CacheSetHelperAPTGet::showPackageSelection(pkgCache::PkgIterator const &pkg, enum PkgSelector const select,
+						std::string const &pattern)
+{
+   switch (select)
+   {
+   case REGEX:
+      showRegExSelection(pkg, pattern);
+      break;
+   case TASK:
+      showTaskSelection(pkg, pattern);
+      break;
+   case FNMATCH:
+      showFnmatchSelection(pkg, pattern);
+      break;
+   default:
+      APT::CacheSetHelper::showPackageSelection(pkg, select, pattern);
+      break;
+   }
+}
+void CacheSetHelperAPTGet::showTaskSelection(pkgCache::PkgIterator const &Pkg, std::string const &pattern)
+{
+   ioprintf(out, _("Note, selecting '%s' for task '%s'\n"),
+	 Pkg.FullName(true).c_str(), pattern.c_str());
+   explicitlyNamed = false;
+}
+void CacheSetHelperAPTGet::showFnmatchSelection(pkgCache::PkgIterator const &Pkg, std::string const &pattern)
+{
+   ioprintf(out, _("Note, selecting '%s' for glob '%s'\n"),
+	 Pkg.FullName(true).c_str(), pattern.c_str());
+   explicitlyNamed = false;
+}
+void CacheSetHelperAPTGet::showRegExSelection(pkgCache::PkgIterator const &Pkg, std::string const &pattern)
+{
+   ioprintf(out, _("Note, selecting '%s' for regex '%s'\n"),
+	 Pkg.FullName(true).c_str(), pattern.c_str());
+   explicitlyNamed = false;
+}
+void CacheSetHelperAPTGet::showVersionSelection(pkgCache::PkgIterator const &Pkg,
+						pkgCache::VerIterator const &Ver, enum VerSelector const select, std::string const &pattern)
+{
+   switch (select)
+   {
+   case VERSIONNUMBER:
+      if (pattern == Ver.VerStr())
+	 return;
+      /* fall through */
+   case RELEASE:
+      selectedByRelease.push_back(make_pair(Ver, pattern));
+      break;
+   default:
+      return APT::CacheSetHelper::showVersionSelection(Pkg, Ver, select, pattern);
+   }
+}
+
+bool CacheSetHelperAPTGet::showVirtualPackageErrors(pkgCacheFile &Cache)
+{
+   if (virtualPkgs.empty() == true)
+      return true;
+   for (APT::PackageSet::const_iterator Pkg = virtualPkgs.begin();
+	 Pkg != virtualPkgs.end(); ++Pkg) {
+      if (Pkg->ProvidesList != 0) {
+	 ioprintf(c1out,_("Package %s is a virtual package provided by:\n"),
+	       Pkg.FullName(true).c_str());
+
+	 pkgCache::PrvIterator I = Pkg.ProvidesList();
+	 unsigned short provider = 0;
+	 for (; I.end() == false; ++I) {
+	    pkgCache::PkgIterator const OPkg = I.OwnerPkg();
+
+	    if (Cache[OPkg].CandidateVerIter(Cache) == I.OwnerVer())
+	    {
+	       c1out << "  " << OPkg.FullName(true) << ' ' << I.OwnerVer().VerStr();
+	       if (I->ProvideVersion != 0)
+		  c1out << " (= " << I.ProvideVersion() << ")";
+	       if (Cache[OPkg].Install() == true && Cache[OPkg].NewInstall() == false)
+		  c1out << _(" [Installed]");
+	       c1out << std::endl;
+	       ++provider;
+	    }
+	 }
+	 // if we found no candidate which provide this package, show non-candidates
+	 if (provider == 0)
+	    for (I = Pkg.ProvidesList(); I.end() == false; ++I)
+	    {
+	       c1out << "  " << I.OwnerPkg().FullName(true) << " " << I.OwnerVer().VerStr();
+	       if (I->ProvideVersion != 0)
+		  c1out << " (= " << I.ProvideVersion() << ")";
+	       c1out << _(" [Not candidate version]") << std::endl;
+	    }
+	 else
+	    out << _("You should explicitly select one to install.") << std::endl;
+      } else {
+	 ioprintf(c1out,
+	       _("Package %s is not available, but is referred to by another package.\n"
+		  "This may mean that the package is missing, has been obsoleted, or\n"
+		  "is only available from another source\n"),Pkg.FullName(true).c_str());
+
+	 std::vector<bool> Seen(Cache.GetPkgCache()->Head().PackageCount, false);
+	 APT::PackageList pkglist;
+	 for (pkgCache::DepIterator Dep = Pkg.RevDependsList();
+	       Dep.end() == false; ++Dep) {
+	    if (Dep->Type != pkgCache::Dep::Replaces)
+	       continue;
+	    pkgCache::PkgIterator const DP = Dep.ParentPkg();
+	    if (Seen[DP->ID] == true)
+	       continue;
+	    Seen[DP->ID] = true;
+	    pkglist.insert(DP);
+	 }
+	 ShowList(c1out, _("However the following packages replace it:"), pkglist,
+	       &AlwaysTrue, &PrettyFullName, &EmptyString);
+      }
+      c1out << std::endl;
+   }
+   return false;
+}
+pkgCache::VerIterator CacheSetHelperAPTGet::canNotGetVersion(enum VerSelector const select, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg)
+{
+   switch (select)
+   {
+   case NEWEST:
+      return canNotFindNewestVer(Cache, Pkg);
+   case CANDIDATE:
+      return canNotFindCandidateVer(Cache, Pkg);
+   case VERSIONNUMBER:
+      return canNotFindVersionNumber(Cache, Pkg, getLastVersionMatcher());
+   case RELEASE:
+      return canNotFindVersionRelease(Cache, Pkg, getLastVersionMatcher());
+   default:
+      return APT::CacheSetHelper::canNotGetVersion(select, Cache, Pkg);
+   }
+}
+void CacheSetHelperAPTGet::canNotFindVersion(enum VerSelector const select, APT::VersionContainerInterface * const vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg)
+{
+   switch (select)
+   {
+   case NEWEST:
+      canNotFindNewestVer(Cache, Pkg);
+      break;
+   case CANDIDATE:
+      canNotFindCandidateVer(Cache, Pkg);
+      break;
+   default:
+      return APT::CacheSetHelper::canNotFindVersion(select, vci, Cache, Pkg);
+   }
+}
+
+pkgCache::VerIterator CacheSetHelperAPTGet::canNotFindVersionNumber(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg, std::string const &verstr)
+{
+   APT::VersionSet const verset = tryVirtualPackage(Cache, Pkg, CacheSetHelper::VERSIONNUMBER);
+   if (not verset.empty())
+      return *(verset.begin());
+   else if (ShowError)
+   {
+      auto const V = canNotGetVerFromVersionNumber(Cache, Pkg, verstr);
+      if (not V.end())
+	 return V;
+      virtualPkgs.insert(Pkg);
+   }
+   return pkgCache::VerIterator(Cache, 0);
+}
+pkgCache::VerIterator CacheSetHelperAPTGet::canNotFindVersionRelease(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg, std::string const &verstr)
+{
+   APT::VersionSet const verset = tryVirtualPackage(Cache, Pkg, CacheSetHelper::RELEASE);
+   if (not verset.empty())
+      return *(verset.begin());
+   else if (ShowError)
+   {
+      auto const V = canNotGetVerFromRelease(Cache, Pkg, verstr);
+      if (not V.end())
+	 return V;
+      virtualPkgs.insert(Pkg);
+   }
+   return pkgCache::VerIterator(Cache, 0);
+}
+pkgCache::VerIterator CacheSetHelperAPTGet::canNotFindCandidateVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg)
+{
+   APT::VersionSet const verset = tryVirtualPackage(Cache, Pkg, CacheSetHelper::CANDIDATE);
+   if (verset.empty() == false)
+      return *(verset.begin());
+   else if (ShowError == true) {
+      _error->Error(_("Package '%s' has no installation candidate"),Pkg.FullName(true).c_str());
+      virtualPkgs.insert(Pkg);
+   }
+   return pkgCache::VerIterator(Cache, 0);
+}
+pkgCache::VerIterator CacheSetHelperAPTGet::canNotFindNewestVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg)
+{
+   if (Pkg->ProvidesList != 0)
+   {
+      APT::VersionSet const verset = tryVirtualPackage(Cache, Pkg, CacheSetHelper::NEWEST);
+      if (verset.empty() == false)
+	 return *(verset.begin());
+      if (ShowError == true)
+	 ioprintf(out, _("Virtual packages like '%s' can't be removed\n"), Pkg.FullName(true).c_str());
+   }
+   else
+   {
+      pkgCache::GrpIterator Grp = Pkg.Group();
+      pkgCache::PkgIterator P = Grp.PackageList();
+      for (; P.end() != true; P = Grp.NextPkg(P))
+      {
+	 if (P == Pkg)
+	    continue;
+	 if (P->CurrentVer != 0) {
+	    // TRANSLATORS: Note, this is not an interactive question
+	    ioprintf(c1out,_("Package '%s' is not installed, so not removed. Did you mean '%s'?\n"),
+		  Pkg.FullName(true).c_str(), P.FullName(true).c_str());
+	    break;
+	 }
+      }
+      if (P.end() == true)
+	 ioprintf(c1out,_("Package '%s' is not installed, so not removed\n"),Pkg.FullName(true).c_str());
+   }
+   return pkgCache::VerIterator(Cache, 0);
+}
+APT::VersionSet CacheSetHelperAPTGet::tryVirtualPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg,
+      CacheSetHelper::VerSelector const select)
+{
+   /* If this is a virtual package see if we have a single matching provider
+      (ignoring multiple matches from the same package due to e.g. M-A) */
+   if (Pkg->ProvidesList == 0)
+      return APT::VersionSet{};
+
+   auto const oldShowError = showErrors(false);
+   APT::VersionVector verset;
+   auto const lastmatcher = getLastVersionMatcher();
+   for (auto P = Pkg.ProvidesList(); not P.end(); ++P)
+   {
+      auto V = P.OwnerVer();
+      switch (select)
+      {
+	 case RELEASE:
+	    for (auto File = V.FileList(); not File.end(); ++File)
+	       if ((File.File().Archive() != nullptr && lastmatcher == File.File().Archive()) ||
+		   (File.File().Codename() != nullptr && lastmatcher == File.File().Codename()))
+	       {
+		  verset.push_back(V);
+		  break;
+	       }
+	    break;
+	 case VERSIONNUMBER:
+	    if (P->ProvideVersion != 0 && lastmatcher == P.ProvideVersion())
+	       verset.push_back(V);
+	    break;
+	 default:
+	    if (Cache[V.ParentPkg()].CandidateVerIter(Cache) == V)
+	       verset.push_back(V);
+	    break;
+      }
+   }
+   // do not change the candidate if we have more than one option for this package
+   if (select == VERSIONNUMBER || select == RELEASE)
+      for (auto const &V : verset)
+	 if (std::count_if(verset.begin(), verset.end(), [Pkg = V.ParentPkg()](auto const &v) { return v.ParentPkg() == Pkg; }) == 1)
+	    Cache->SetCandidateVersion(V);
+   showErrors(oldShowError);
+
+   pkgCache::VerIterator Choosen;
+   for (auto const &Ver : verset)
+   {
+      if (Choosen.end())
+	 Choosen = Ver;
+      else
+      {
+	 auto const ChoosenPkg = Choosen.ParentPkg();
+	 auto const AltPkg = Ver.ParentPkg();
+	 // seeing two different packages makes it not simple anymore
+	 if (ChoosenPkg->Group != AltPkg->Group)
+	    return APT::VersionSet{};
+	 // do we already have the requested arch?
+	 if (strcmp(Pkg.Arch(), ChoosenPkg.Arch()) == 0 ||
+	     strcmp(ChoosenPkg.Arch(), "all") == 0)
+	    continue;
+	 // see which architecture we prefer more and switch to it
+	 std::vector<std::string> archs = APT::Configuration::getArchitectures();
+	 if (std::find(archs.begin(), archs.end(), AltPkg.Arch()) < std::find(archs.begin(), archs.end(), ChoosenPkg.Arch()))
+	    Choosen = Ver;
+      }
+   }
+   if (Choosen.end())
+      return APT::VersionSet{};
+
+   ioprintf(out, _("Note, selecting '%s' instead of '%s'\n"),
+	 Choosen.ParentPkg().FullName(true).c_str(), Pkg.FullName(true).c_str());
+   return { Choosen };
+}
+pkgCache::PkgIterator CacheSetHelperAPTGet::canNotFindPkgName(pkgCacheFile &Cache, std::string const &str)
+{
+   pkgCache::PkgIterator Pkg = canNotFindPkgName_impl(Cache, str);
+   if (Pkg.end())
+   {
+      Pkg = APT::CacheSetHelper::canNotFindPkgName(Cache, str);
+      if (Pkg.end() && ShowError)
+      {
+	 notFound.insert(str);
+      }
+   }
+   return Pkg;
+}
+									/*}}}*/
diff --git a/apt-private/private-cacheset.h b/apt-private/private-cacheset.h
new file mode 100644
index 0000000..e8dba5a
--- /dev/null
+++ b/apt-private/private-cacheset.h
@@ -0,0 +1,132 @@
+#ifndef APT_PRIVATE_CACHESET_H
+#define APT_PRIVATE_CACHESET_H
+
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/macros.h>
+
+#include <apt-private/private-output.h>
+
+#include <list>
+#include <set>
+#include <string>
+#include <vector>
+
+class OpProgress;
+
+class VerIteratorWithCaching
+{
+   const pkgCache::VerIterator iter;
+   const pkgCache::DescFile * descFile;
+public:
+
+   // cppcheck-suppress noExplicitConstructor
+   VerIteratorWithCaching(const pkgCache::VerIterator& iter) :
+      iter(iter),
+      descFile(iter->DescriptionList != 0
+	 ? (const pkgCache::DescFile *) iter.TranslatedDescription().FileList()
+	 : nullptr)
+   {}
+   const pkgCache::DescFile * CachedDescFile() const { return descFile; }
+   operator pkgCache::VerIterator() const { return iter; }
+   map_id_t ID() const { return iter->ID; }
+};
+
+struct VersionSortDescriptionLocality					/*{{{*/
+{
+   bool operator () (const VerIteratorWithCaching &v_lhs,
+	 const VerIteratorWithCaching &v_rhs) const
+   {
+      pkgCache::DescFile const *A = v_lhs.CachedDescFile();
+      pkgCache::DescFile const *B = v_rhs.CachedDescFile();
+
+      if (A == nullptr)
+      {
+	 if (B == nullptr)
+	    return v_lhs.ID() < v_rhs.ID();
+	 return true;
+      }
+      else if (B == nullptr)
+	 return false;
+
+      if (A->File == B->File)
+      {
+	 if (A->Offset == B->Offset)
+	    return v_lhs.ID() < v_rhs.ID();
+	 return A->Offset < B->Offset;
+      }
+
+      return A->File < B->File;
+   }
+};
+									/*}}}*/
+// sorted by locality which makes iterating much faster
+typedef APT::VersionContainer<
+   std::set<VerIteratorWithCaching,
+            VersionSortDescriptionLocality> > LocalitySortedVersionSet;
+
+class Matcher {
+public:
+    virtual bool operator () (const pkgCache::PkgIterator &/*P*/) {
+        return true;}
+};
+
+// FIXME: add default argument for OpProgress (or overloaded function)
+bool GetLocalitySortedVersionSet(pkgCacheFile &CacheFile,
+                                    APT::VersionContainerInterface * const vci,
+                                    Matcher &matcher,
+                                    OpProgress * const progress);
+bool GetLocalitySortedVersionSet(pkgCacheFile &CacheFile,
+                                    APT::VersionContainerInterface * const vci,
+                                    OpProgress * const progress);
+
+
+// CacheSetHelper saving virtual packages				/*{{{*/
+class CacheSetHelperVirtuals: public APT::CacheSetHelper {
+public:
+   APT::PackageSet virtualPkgs;
+
+   virtual pkgCache::VerIterator canNotGetVersion(enum CacheSetHelper::VerSelector const select, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) APT_OVERRIDE;
+   virtual void canNotFindVersion(enum CacheSetHelper::VerSelector const select, APT::VersionContainerInterface * vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) APT_OVERRIDE;
+   virtual pkgCache::PkgIterator canNotFindPkgName(pkgCacheFile &Cache, std::string const &str) APT_OVERRIDE;
+
+   CacheSetHelperVirtuals(bool const ShowErrors = true, GlobalError::MsgType const &ErrorType = GlobalError::NOTICE);
+};
+									/*}}}*/
+
+// CacheSetHelperAPTGet - responsible for message telling from the CacheSets/*{{{*/
+class CacheSetHelperAPTGet : public APT::CacheSetHelper {
+	/** \brief stream message should be printed to */
+	std::ostream &out;
+	/** \brief were things like Task or RegEx used to select packages? */
+	bool explicitlyNamed;
+
+	APT::PackageSet virtualPkgs;
+public:
+	std::list<std::pair<pkgCache::VerIterator, std::string> > selectedByRelease;
+	std::set<std::string> notFound;
+
+	explicit CacheSetHelperAPTGet(std::ostream &out);
+
+	virtual void showPackageSelection(pkgCache::PkgIterator const &Pkg, enum PkgSelector const select, std::string const &pattern) APT_OVERRIDE;
+	void showTaskSelection(pkgCache::PkgIterator const &Pkg, std::string const &pattern);
+	void showFnmatchSelection(pkgCache::PkgIterator const &Pkg, std::string const &pattern);
+	void showRegExSelection(pkgCache::PkgIterator const &Pkg, std::string const &pattern);
+	void showVersionSelection(pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const &Ver, enum VerSelector const select, std::string const &pattern) APT_OVERRIDE;
+	bool showVirtualPackageErrors(pkgCacheFile &Cache);
+
+	pkgCache::VerIterator canNotGetVersion(enum VerSelector const select, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) APT_OVERRIDE;
+	void canNotFindVersion(enum VerSelector const select, APT::VersionContainerInterface * const vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg) APT_OVERRIDE;
+	pkgCache::VerIterator canNotFindCandidateVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
+	pkgCache::VerIterator canNotFindNewestVer(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
+	pkgCache::VerIterator canNotFindVersionNumber(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg, std::string const &verstr);
+	pkgCache::VerIterator canNotFindVersionRelease(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg, std::string const &verstr);
+	virtual pkgCache::PkgIterator canNotFindPkgName(pkgCacheFile &Cache, std::string const &str) APT_OVERRIDE;
+
+	APT::VersionSet tryVirtualPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg,
+						CacheSetHelper::VerSelector const select);
+
+	inline bool allPkgNamedExplicitly() const { return explicitlyNamed; }
+};
+									/*}}}*/
+
+#endif
diff --git a/apt-private/private-cmndline.cc b/apt-private/private-cmndline.cc
new file mode 100644
index 0000000..79881d0
--- /dev/null
+++ b/apt-private/private-cmndline.cc
@@ -0,0 +1,607 @@
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/init.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-cmndline.h>
+#include <apt-private/private-main.h>
+
+#include <cstdarg>
+#include <cstdlib>
+#include <cstring>
+#include <unistd.h>
+
+#include <algorithm>
+#include <iomanip>
+#include <vector>
+
+#include <apti18n.h>
+									/*}}}*/
+
+APT_NONNULL(1, 2)
+static bool CmdMatches_fn(char const *const Cmd, char const *const Match)
+{
+   return strcmp(Cmd, Match) == 0;
+}
+template <typename... Tail>
+APT_NONNULL(1, 2)
+static bool CmdMatches_fn(char const *const Cmd, char const *const Match, Tail... MoreMatches)
+{
+   return CmdMatches_fn(Cmd, Match) || CmdMatches_fn(Cmd, MoreMatches...);
+}
+#define addArg(w, x, y, z) Args.emplace_back(CommandLine::MakeArgs(w, x, y, z))
+#define CmdMatches(...) (Cmd != nullptr && CmdMatches_fn(Cmd, __VA_ARGS__))
+
+static bool addArgumentsAPTCache(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("depends", "rdepends"))
+   {
+      addArg('i', "important", "APT::Cache::Important", 0);
+      addArg(0, "installed", "APT::Cache::Installed", 0);
+      addArg(0, "pre-depends", "APT::Cache::ShowPre-Depends", 0);
+      addArg(0, "depends", "APT::Cache::ShowDepends", 0);
+      addArg(0, "recommends", "APT::Cache::ShowRecommends", 0);
+      addArg(0, "suggests", "APT::Cache::ShowSuggests", 0);
+      addArg(0, "replaces", "APT::Cache::ShowReplaces", 0);
+      addArg(0, "breaks", "APT::Cache::ShowBreaks", 0);
+      addArg(0, "conflicts", "APT::Cache::ShowConflicts", 0);
+      addArg(0, "enhances", "APT::Cache::ShowEnhances", 0);
+      addArg(0, "recurse", "APT::Cache::RecurseDepends", 0);
+      addArg(0, "implicit", "APT::Cache::ShowImplicit", 0);
+   }
+   else if (CmdMatches("search"))
+   {
+      addArg('n', "names-only", "APT::Cache::NamesOnly", 0);
+      addArg('f', "full", "APT::Cache::ShowFull", 0);
+   }
+   else if (CmdMatches("show") | CmdMatches("info"))
+   {
+      addArg('a', "all-versions", "APT::Cache::AllVersions", 0);
+   }
+   else if (CmdMatches("pkgnames"))
+   {
+      addArg(0, "all-names", "APT::Cache::AllNames", 0);
+   }
+   else if (CmdMatches("unmet"))
+   {
+      addArg('i', "important", "APT::Cache::Important", 0);
+   }
+   else if (CmdMatches("showsrc"))
+   {
+      addArg(0,"only-source","APT::Cache::Only-Source",0);
+   }
+   else if (CmdMatches("gencaches", "showpkg", "stats", "dump",
+	    "dumpavail", "showauto", "policy", "madison"))
+      ;
+   else
+      return false;
+
+   bool const found_something = Args.empty() == false;
+
+   // FIXME: move to the correct command(s)
+   addArg('g', "generate", "APT::Cache::Generate", 0);
+   addArg('t', "target-release", "APT::Default-Release", CommandLine::HasArg);
+   addArg('t', "default-release", "APT::Default-Release", CommandLine::HasArg);
+   addArg('S', "snapshot", "APT::Snapshot", CommandLine::HasArg);
+
+   addArg('p', "pkg-cache", "Dir::Cache::pkgcache", CommandLine::HasArg);
+   addArg('s', "src-cache", "Dir::Cache::srcpkgcache", CommandLine::HasArg);
+   addArg(0, "with-source", "APT::Sources::With::", CommandLine::HasArg);
+
+   return found_something;
+}
+									/*}}}*/
+static bool addArgumentsAPTCDROM(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("add", "ident") == false)
+      return false;
+
+   // FIXME: move to the correct command(s)
+   addArg(0, "auto-detect", "Acquire::cdrom::AutoDetect", CommandLine::Boolean);
+   addArg('d', "cdrom", "Acquire::cdrom::mount", CommandLine::HasArg);
+   addArg('r', "rename", "APT::CDROM::Rename", 0);
+   addArg('m', "no-mount", "APT::CDROM::NoMount", 0);
+   addArg('f', "fast", "APT::CDROM::Fast", 0);
+   addArg('n', "just-print", "APT::CDROM::NoAct", 0);
+   addArg('n', "recon", "APT::CDROM::NoAct", 0);
+   addArg('n', "no-act", "APT::CDROM::NoAct", 0);
+   addArg('a', "thorough", "APT::CDROM::Thorough", 0);
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTConfig(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("dump"))
+   {
+      addArg(0,"empty","APT::Config::Dump::EmptyValue",CommandLine::Boolean);
+      addArg(0,"format","APT::Config::Dump::Format",CommandLine::HasArg);
+   }
+   else if (CmdMatches("shell"))
+      ;
+   else
+      return false;
+
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTDumpSolver(std::vector<CommandLine::Args> &Args, char const * const)/*{{{*/
+{
+   addArg(0,"user","APT::Solver::RunAsUser",CommandLine::HasArg);
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTExtractTemplates(std::vector<CommandLine::Args> &Args, char const * const)/*{{{*/
+{
+   addArg('t',"tempdir","APT::ExtractTemplates::TempDir",CommandLine::HasArg);
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTFTPArchive(std::vector<CommandLine::Args> &Args, char const * const)/*{{{*/
+{
+   addArg(0,"md5","APT::FTPArchive::MD5",0);
+   addArg(0,"sha1","APT::FTPArchive::SHA1",0);
+   addArg(0,"sha256","APT::FTPArchive::SHA256",0);
+   addArg(0,"sha512","APT::FTPArchive::SHA512",0);
+   addArg('d',"db","APT::FTPArchive::DB",CommandLine::HasArg);
+   addArg('s',"source-override","APT::FTPArchive::SourceOverride",CommandLine::HasArg);
+   addArg(0,"delink","APT::FTPArchive::DeLinkAct",0);
+   addArg(0,"readonly","APT::FTPArchive::ReadOnlyDB",0);
+   addArg(0,"contents","APT::FTPArchive::Contents",0);
+   addArg('a',"arch","APT::FTPArchive::Architecture",CommandLine::HasArg);
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTInternalPlanner(std::vector<CommandLine::Args> &, char const * const)/*{{{*/
+{
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTInternalSolver(std::vector<CommandLine::Args> &, char const * const)/*{{{*/
+{
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTHelper(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("cat-file"))
+   {
+      addArg('C', "compress", "Apt-Helper::Cat-File::Compress",CommandLine::HasArg);
+   }
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTGet(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("install", "reinstall", "remove", "purge", "upgrade", "dist-upgrade",
+	    "dselect-upgrade", "autoremove", "autopurge", "full-upgrade"))
+   {
+      addArg(0, "show-progress", "DpkgPM::Progress", 0);
+      addArg('f', "fix-broken", "APT::Get::Fix-Broken", 0);
+      addArg(0, "purge", "APT::Get::Purge", 0);
+      addArg('V',"verbose-versions","APT::Get::Show-Versions",0);
+      addArg(0, "autoremove", "APT::Get::AutomaticRemove", 0);
+      addArg(0, "auto-remove", "APT::Get::AutomaticRemove", 0);
+      addArg(0, "reinstall", "APT::Get::ReInstall", 0);
+      addArg(0, "solver", "APT::Solver", CommandLine::HasArg);
+      addArg(0, "planner", "APT::Planner", CommandLine::HasArg);
+      addArg('U', "update", "APT::Update", 0);
+      if (CmdMatches("upgrade"))
+      {
+         addArg(0, "new-pkgs", "APT::Get::Upgrade-Allow-New", 
+                CommandLine::Boolean);
+      }
+   }
+
+   else if (CmdMatches("update") || CmdMatches("install"))
+   {
+      addArg(0, "list-cleanup", "APT::Get::List-Cleanup", 0);
+      addArg(0, "allow-insecure-repositories", "Acquire::AllowInsecureRepositories", 0);
+      addArg(0, "allow-weak-repositories", "Acquire::AllowWeakRepositories", 0);
+      addArg(0, "allow-releaseinfo-change", "Acquire::AllowReleaseInfoChange", 0);
+      addArg(0, "allow-releaseinfo-change-origin", "Acquire::AllowReleaseInfoChange::Origin", 0);
+      addArg(0, "allow-releaseinfo-change-label", "Acquire::AllowReleaseInfoChange::Label", 0);
+      addArg(0, "allow-releaseinfo-change-version", "Acquire::AllowReleaseInfoChange::Version", 0);
+      addArg(0, "allow-releaseinfo-change-codename", "Acquire::AllowReleaseInfoChange::Codename", 0);
+      addArg(0, "allow-releaseinfo-change-suite", "Acquire::AllowReleaseInfoChange::Suite", 0);
+      addArg(0, "allow-releaseinfo-change-defaultpin", "Acquire::AllowReleaseInfoChange::DefaultPin", 0);
+      addArg('e', "error-on", "APT::Update::Error-Mode", CommandLine::HasArg);
+   }
+   else if (CmdMatches("source"))
+   {
+      addArg('a', "host-architecture", "APT::Get::Host-Architecture", CommandLine::HasArg);
+      addArg('b', "compile", "APT::Get::Compile", 0);
+      addArg('b', "build", "APT::Get::Compile", 0);
+      addArg('P', "build-profiles", "APT::Build-Profiles", CommandLine::HasArg);
+      addArg(0, "diff-only", "APT::Get::Diff-Only", 0);
+      addArg(0, "debian-only", "APT::Get::Diff-Only", 0);
+      addArg(0, "tar-only", "APT::Get::Tar-Only", 0);
+      addArg(0, "dsc-only", "APT::Get::Dsc-Only", 0);
+   }
+   else if (CmdMatches("build-dep") || CmdMatches("satisfy"))
+   {
+      addArg('a', "host-architecture", "APT::Get::Host-Architecture", CommandLine::HasArg);
+      addArg('P', "build-profiles", "APT::Build-Profiles", CommandLine::HasArg);
+      addArg(0, "purge", "APT::Get::Purge", 0);
+      addArg(0, "solver", "APT::Solver", CommandLine::HasArg);
+      if (CmdMatches("build-dep"))
+      {
+         addArg(0,"arch-only","APT::Get::Arch-Only",0);
+         addArg(0,"indep-only","APT::Get::Indep-Only",0);
+      }
+      // this has no effect *but* sbuild is using it (see LP: #1255806)
+      // once sbuild is fixed, this option can be removed
+      addArg('f', "fix-broken", "APT::Get::Fix-Broken", 0);
+   }
+   else if (CmdMatches("indextargets"))
+   {
+      addArg(0,"format","APT::Get::IndexTargets::Format", CommandLine::HasArg);
+      addArg(0,"release-info","APT::Get::IndexTargets::ReleaseInfo", 0);
+   }
+   else if (CmdMatches("clean", "autoclean", "auto-clean", "distclean", "dist-clean", "check", "download", "changelog") ||
+	    CmdMatches("markauto", "unmarkauto")) // deprecated commands
+      ;
+   else if (CmdMatches("moo"))
+      addArg(0, "color", "APT::Moo::Color", 0);
+
+   if (CmdMatches("install", "reinstall", "remove", "purge", "upgrade", "dist-upgrade",
+	    "dselect-upgrade", "autoremove", "auto-remove", "autopurge", "check",
+	    "clean", "autoclean", "auto-clean", "distclean", "dist-clean",
+	    "build-dep", "satisfy", "full-upgrade", "source"))
+   {
+      addArg('s', "simulate", "APT::Get::Simulate", 0);
+      addArg('s', "just-print", "APT::Get::Simulate", 0);
+      addArg('s', "recon", "APT::Get::Simulate", 0);
+      addArg('s', "dry-run", "APT::Get::Simulate", 0);
+      addArg('s', "no-act", "APT::Get::Simulate", 0);
+   }
+
+   bool const found_something = Args.empty() == false;
+
+   // FIXME: move to the correct command(s)
+   addArg('d',"download-only","APT::Get::Download-Only",0);
+   addArg('y',"yes","APT::Get::Assume-Yes",0);
+   addArg('y',"assume-yes","APT::Get::Assume-Yes",0);
+   addArg(0,"assume-no","APT::Get::Assume-No",0);
+   addArg('u',"show-upgraded","APT::Get::Show-Upgraded",0);
+   addArg('m',"ignore-missing","APT::Get::Fix-Missing",0);
+   addArg('t',"target-release","APT::Default-Release",CommandLine::HasArg);
+   addArg('t',"default-release","APT::Default-Release",CommandLine::HasArg);
+   addArg('S', "snapshot", "APT::Snapshot", CommandLine::HasArg);
+   addArg(0,"download","APT::Get::Download",0);
+   addArg(0,"fix-missing","APT::Get::Fix-Missing",0);
+   addArg(0,"ignore-hold","APT::Ignore-Hold",0);
+   addArg(0,"upgrade","APT::Get::upgrade",0);
+   addArg(0,"only-upgrade","APT::Get::Only-Upgrade",0);
+   addArg(0,"allow-change-held-packages","APT::Get::allow-change-held-packages",CommandLine::Boolean);
+   addArg(0,"allow-remove-essential","APT::Get::allow-remove-essential",CommandLine::Boolean);
+   addArg(0,"allow-downgrades","APT::Get::allow-downgrades",CommandLine::Boolean);
+   addArg(0,"force-yes","APT::Get::force-yes",0);
+   addArg(0,"print-uris","APT::Get::Print-URIs",0);
+   addArg(0,"trivial-only","APT::Get::Trivial-Only",0);
+   addArg(0,"mark-auto","APT::Get::Mark-Auto",0);
+   addArg(0,"remove","APT::Get::Remove",0);
+   addArg(0,"only-source","APT::Get::Only-Source",0);
+   addArg(0,"allow-unauthenticated","APT::Get::AllowUnauthenticated",0);
+   addArg(0,"install-recommends","APT::Install-Recommends",CommandLine::Boolean);
+   addArg(0,"install-suggests","APT::Install-Suggests",CommandLine::Boolean);
+   addArg(0,"fix-policy","APT::Get::Fix-Policy-Broken",0);
+   addArg(0, "with-source", "APT::Sources::With::", CommandLine::HasArg);
+
+   return found_something;
+}
+									/*}}}*/
+static bool addArgumentsAPTMark(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("auto", "manual", "hold", "unhold", "showauto",
+	    "showmanual", "showhold", "showholds", "showheld",
+	    "markauto", "unmarkauto", "minimize-manual"))
+   {
+      addArg('f',"file","Dir::State::extended_states",CommandLine::HasArg);
+   }
+   else if (CmdMatches("install", "reinstall", "remove", "deinstall", "purge",
+	    "showinstall", "showinstalls", "showremove", "showremoves",
+	    "showdeinstall", "showdeinstalls", "showpurge", "showpurges"))
+      ;
+   else
+      return false;
+
+   if (CmdMatches("markauto", "unmarkauto"))
+   {
+      addArg('v',"verbose","APT::MarkAuto::Verbose",0);
+   }
+
+   if (CmdMatches("minimize-manual"))
+   {
+      addArg('y',"yes","APT::Get::Assume-Yes",0);
+      addArg('y',"assume-yes","APT::Get::Assume-Yes",0);
+      addArg(0,"assume-no","APT::Get::Assume-No",0);
+   }
+
+   if (CmdMatches("minimize-manual") || (Cmd != nullptr && strncmp(Cmd, "show", strlen("show")) != 0))
+   {
+      addArg('s',"simulate","APT::Mark::Simulate",0);
+      addArg('s',"just-print","APT::Mark::Simulate",0);
+      addArg('s',"recon","APT::Mark::Simulate",0);
+      addArg('s',"dry-run","APT::Mark::Simulate",0);
+      addArg('s',"no-act","APT::Mark::Simulate",0);
+   }
+   addArg(0, "with-source", "APT::Sources::With::", CommandLine::HasArg);
+
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPTSortPkgs(std::vector<CommandLine::Args> &Args, char const * const)/*{{{*/
+{
+   addArg('s',"source","APT::SortPkgs::Source",0);
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsAPT(std::vector<CommandLine::Args> &Args, char const * const Cmd)/*{{{*/
+{
+   if (CmdMatches("list"))
+   {
+      addArg('i',"installed","APT::Cmd::Installed",0);
+      addArg(0,"upgradeable","APT::Cmd::Upgradable",0);
+      addArg('u',"upgradable","APT::Cmd::Upgradable",0);
+      addArg(0,"manual-installed","APT::Cmd::Manual-Installed",0);
+      addArg('v', "verbose", "APT::Cmd::List-Include-Summary", 0);
+      addArg('a', "all-versions", "APT::Cmd::All-Versions", 0);
+   }
+   else if (CmdMatches("show") || CmdMatches("info"))
+   {
+      addArg('a', "all-versions", "APT::Cache::AllVersions", 0);
+      addArg('f', "full", "APT::Cache::ShowFull", 0);
+   }
+   else if (addArgumentsAPTGet(Args, Cmd) || addArgumentsAPTCache(Args, Cmd))
+   {
+       // we have no (supported) command-name overlaps so far, so we call
+       // specifics in order until we find one which adds arguments
+   }
+   else
+      return false;
+
+   addArg(0, "with-source", "APT::Sources::With::", CommandLine::HasArg);
+
+   return true;
+}
+									/*}}}*/
+static bool addArgumentsRred(std::vector<CommandLine::Args> &Args, char const * const /*Cmd*/)/*{{{*/
+{
+   addArg('t', nullptr, "Rred::T", 0);
+   addArg('f', nullptr, "Rred::F", 0);
+   addArg('C', "compress", "Rred::Compress",CommandLine::HasArg);
+   return true;
+}
+									/*}}}*/
+std::vector<CommandLine::Args> getCommandArgs(APT_CMD const Program, char const * const Cmd)/*{{{*/
+{
+   std::vector<CommandLine::Args> Args;
+   Args.reserve(50);
+   if (Cmd != nullptr && strcmp(Cmd, "help") == 0)
+      ; // no options for help so no need to implement it in each
+   else
+      switch (Program)
+      {
+	 case APT_CMD::APT: addArgumentsAPT(Args, Cmd); break;
+	 case APT_CMD::APT_GET: addArgumentsAPTGet(Args, Cmd); break;
+	 case APT_CMD::APT_CACHE: addArgumentsAPTCache(Args, Cmd); break;
+	 case APT_CMD::APT_CDROM: addArgumentsAPTCDROM(Args, Cmd); break;
+	 case APT_CMD::APT_CONFIG: addArgumentsAPTConfig(Args, Cmd); break;
+	 case APT_CMD::APT_DUMP_SOLVER: addArgumentsAPTDumpSolver(Args, Cmd); break;
+	 case APT_CMD::APT_EXTRACTTEMPLATES: addArgumentsAPTExtractTemplates(Args, Cmd); break;
+	 case APT_CMD::APT_FTPARCHIVE: addArgumentsAPTFTPArchive(Args, Cmd); break;
+	 case APT_CMD::APT_HELPER: addArgumentsAPTHelper(Args, Cmd); break;
+	 case APT_CMD::APT_INTERNAL_PLANNER: addArgumentsAPTInternalPlanner(Args, Cmd); break;
+	 case APT_CMD::APT_INTERNAL_SOLVER: addArgumentsAPTInternalSolver(Args, Cmd); break;
+	 case APT_CMD::APT_MARK: addArgumentsAPTMark(Args, Cmd); break;
+	 case APT_CMD::APT_SORTPKG: addArgumentsAPTSortPkgs(Args, Cmd); break;
+	 case APT_CMD::RRED: addArgumentsRred(Args, Cmd); break;
+      }
+
+   // options without a command
+   addArg('h', "help", "help", 0);
+   addArg('v', "version", "version", 0);
+   // general options
+   addArg('q', "quiet", "quiet", CommandLine::IntLevel);
+   addArg('q', "silent", "quiet", CommandLine::IntLevel);
+   addArg('c', "config-file", 0, CommandLine::ConfigFile);
+   addArg('o', "option", 0, CommandLine::ArbItem);
+   addArg(0, NULL, NULL, 0);
+
+   return Args;
+}
+									/*}}}*/
+#undef addArg
+static void ShowHelpListCommands(std::vector<aptDispatchWithHelp> const &Cmds)/*{{{*/
+{
+   if (Cmds.empty() || Cmds[0].Match == nullptr)
+      return;
+   std::cout << std::endl << _("Most used commands:") << std::endl;
+   for (auto const &c: Cmds)
+   {
+      if (c.Help == nullptr)
+	 continue;
+      std::cout << "  " << c.Match << " - " << c.Help << std::endl;
+   }
+}
+									/*}}}*/
+static bool ShowCommonHelp(APT_CMD const Binary, CommandLine &CmdL, std::vector<aptDispatchWithHelp> const &Cmds,/*{{{*/
+      bool (*ShowHelp)(CommandLine &))
+{
+   std::cout << PACKAGE << " " << PACKAGE_VERSION << " (" << COMMON_ARCH << ")" << std::endl;
+   if (_config->FindB("version") == true && Binary != APT_CMD::APT_GET)
+      return true;
+   if (ShowHelp(CmdL) == false)
+      return false;
+   if (_config->FindB("version") == true || Binary == APT_CMD::APT_FTPARCHIVE)
+      return true;
+   ShowHelpListCommands(Cmds);
+   std::cout << std::endl;
+   char const * cmd = nullptr;
+   switch (Binary)
+   {
+      case APT_CMD::APT: cmd = "apt(8)"; break;
+      case APT_CMD::APT_CACHE: cmd = "apt-cache(8)"; break;
+      case APT_CMD::APT_CDROM: cmd = "apt-cdrom(8)"; break;
+      case APT_CMD::APT_CONFIG: cmd = "apt-config(8)"; break;
+      case APT_CMD::APT_DUMP_SOLVER: cmd = nullptr; break;
+      case APT_CMD::APT_EXTRACTTEMPLATES: cmd = "apt-extracttemplates(1)"; break;
+      case APT_CMD::APT_FTPARCHIVE: cmd = "apt-ftparchive(1)"; break;
+      case APT_CMD::APT_GET: cmd = "apt-get(8)"; break;
+      case APT_CMD::APT_HELPER: cmd = nullptr; break;
+      case APT_CMD::APT_INTERNAL_PLANNER: cmd = nullptr; break;
+      case APT_CMD::APT_INTERNAL_SOLVER: cmd = nullptr; break;
+      case APT_CMD::APT_MARK: cmd = "apt-mark(8)"; break;
+      case APT_CMD::APT_SORTPKG: cmd = "apt-sortpkgs(1)"; break;
+      case APT_CMD::RRED: cmd = nullptr; break;
+   }
+   if (cmd != nullptr)
+      ioprintf(std::cout, _("See %s for more information about the available commands."), cmd);
+   if (Binary != APT_CMD::APT_DUMP_SOLVER && Binary != APT_CMD::APT_INTERNAL_SOLVER &&
+	 Binary != APT_CMD::APT_INTERNAL_PLANNER && Binary != APT_CMD::RRED)
+      std::cout << std::endl <<
+	 _("Configuration options and syntax is detailed in apt.conf(5).\n"
+	       "Information about how to configure sources can be found in sources.list(5).\n"
+	       "Package and version choices can be expressed via apt_preferences(5).\n"
+	       "Security details are available in apt-secure(8).\n");
+   if (Binary == APT_CMD::APT_GET || Binary == APT_CMD::APT)
+      std::cout << std::right << std::setw(70) << _("This APT has Super Cow Powers.") << std::endl;
+   else if (Binary == APT_CMD::APT_HELPER || Binary == APT_CMD::APT_DUMP_SOLVER)
+      std::cout << std::right << std::setw(70) << _("This APT helper has Super Meep Powers.") << std::endl;
+   return true;
+}
+									/*}}}*/
+static void BinarySpecificConfiguration(char const * const Binary)	/*{{{*/
+{
+   std::string const binary = flNotDir(Binary);
+   if (binary == "apt" || binary == "apt-config")
+   {
+      if (getenv("NO_COLOR") == nullptr)
+         _config->CndSet("Binary::apt::APT::Color", true);
+      _config->CndSet("Binary::apt::APT::Cache::Show::Version", 2);
+      _config->CndSet("Binary::apt::APT::Cache::AllVersions", false);
+      _config->CndSet("Binary::apt::APT::Cache::ShowVirtuals", true);
+      _config->CndSet("Binary::apt::APT::Cache::Search::Version", 2);
+      _config->CndSet("Binary::apt::APT::Cache::ShowDependencyType", true);
+      _config->CndSet("Binary::apt::APT::Cache::ShowVersion", true);
+      _config->CndSet("Binary::apt::APT::Get::Upgrade-Allow-New", true);
+      _config->CndSet("Binary::apt::APT::Cmd::Show-Update-Stats", true);
+      _config->CndSet("Binary::apt::DPkg::Progress-Fancy", true);
+      _config->CndSet("Binary::apt::APT::Keep-Downloaded-Packages", false);
+      _config->CndSet("Binary::apt::APT::Get::Update::InteractiveReleaseInfoChanges", true);
+      _config->CndSet("Binary::apt::APT::Cmd::Pattern-Only", true);
+
+      if (isatty(STDIN_FILENO))
+         _config->CndSet("Binary::apt::Dpkg::Lock::Timeout", -1);
+      else
+         _config->CndSet("Binary::apt::Dpkg::Lock::Timeout", 120);
+   }
+
+   _config->Set("Binary", binary);
+}
+									/*}}}*/
+static void BinaryCommandSpecificConfiguration(char const * const Binary, char const * const Cmd)/*{{{*/
+{
+   std::string const binary = flNotDir(Binary);
+   if ((binary == "apt" || binary == "apt-get") && CmdMatches("upgrade", "dist-upgrade", "full-upgrade"))
+   {
+      //FIXME: the option is documented to apply only for install/remove, so
+      // we force it false for configuration files where users can be confused if
+      // we support it anyhow, but allow it on the commandline to take effect
+      // even through it isn't documented as a user who doesn't want it wouldn't
+      // ask for it
+      _config->Set("APT::Get::AutomaticRemove", "");
+   }
+}
+#undef CmdMatches
+									/*}}}*/
+std::vector<CommandLine::Dispatch> ParseCommandLine(CommandLine &CmdL, APT_CMD const Binary,/*{{{*/
+      Configuration * const * const Cnf, pkgSystem ** const Sys, int const argc, const char *argv[],
+      bool (*ShowHelp)(CommandLine &), std::vector<aptDispatchWithHelp> (*GetCommands)(void))
+{
+   InitLocale(Binary);
+   if (Cnf != NULL && pkgInitConfig(**Cnf) == false)
+   {
+      _error->DumpErrors();
+      exit(100);
+   }
+
+   if (likely(argc != 0 && argv[0] != NULL))
+      BinarySpecificConfiguration(argv[0]);
+
+   std::vector<CommandLine::Dispatch> Cmds;
+   std::vector<aptDispatchWithHelp> const CmdsWithHelp = GetCommands();
+   if (CmdsWithHelp.empty() == false)
+   {
+      CommandLine::Dispatch const help = { "help", [](CommandLine &){return false;} };
+      Cmds.push_back(std::move(help));
+   }
+   std::transform(CmdsWithHelp.begin(), CmdsWithHelp.end(), std::back_inserter(Cmds),
+		  [](auto &&cmd) { return CommandLine::Dispatch{cmd.Match, cmd.Handler}; });
+
+   char const * CmdCalled = nullptr;
+   if (Cmds.empty() == false && Cmds[0].Handler != nullptr)
+      CmdCalled = CommandLine::GetCommand(Cmds.data(), argc, argv);
+   if (CmdCalled != nullptr)
+      BinaryCommandSpecificConfiguration(argv[0], CmdCalled);
+   std::string const conf = "Binary::" + _config->Find("Binary");
+   _config->MoveSubTree(conf.c_str(), nullptr);
+
+   // Args running out of scope invalidates the pointer stored in CmdL,
+   // but we don't use the pointer after this function, so we ignore
+   // this problem for now and figure something out if we have to.
+   auto Args = getCommandArgs(Binary, CmdCalled);
+   CmdL = CommandLine(Args.data(), _config);
+
+   if (CmdL.Parse(argc,argv) == false ||
+       (Sys != NULL && pkgInitSystem(*_config, *Sys) == false))
+   {
+      if (_config->FindB("version") == true)
+	 ShowCommonHelp(Binary, CmdL, CmdsWithHelp, ShowHelp);
+
+      _error->DumpErrors();
+      exit(100);
+   }
+
+   if (_config->FindB("APT::Get::Force-Yes", false) == true)
+   {
+      _error->Warning(_("--force-yes is deprecated, use one of the options starting with --allow instead."));
+   }
+
+   // See if the help should be shown
+   if (_config->FindB("help") == true || _config->FindB("version") == true ||
+	 (CmdL.FileSize() > 0 && strcmp(CmdL.FileList[0], "help") == 0))
+   {
+      ShowCommonHelp(Binary, CmdL, CmdsWithHelp, ShowHelp);
+      exit(0);
+   }
+   if (Cmds.empty() == false && CmdL.FileSize() == 0)
+   {
+      ShowCommonHelp(Binary, CmdL, CmdsWithHelp, ShowHelp);
+      exit(1);
+   }
+   return Cmds;
+}
+									/*}}}*/
+unsigned short DispatchCommandLine(CommandLine &CmdL, std::vector<CommandLine::Dispatch> const &Cmds)	/*{{{*/
+{
+   // Match the operation
+   bool const returned = Cmds.empty() ? true : CmdL.DispatchArg(Cmds.data());
+
+   // Print any errors or warnings found during parsing
+   bool const Errors = _error->PendingError();
+   if (_config->FindI("quiet",0) > 0)
+      _error->DumpErrors();
+   else
+      _error->DumpErrors(GlobalError::DEBUG);
+   if (returned == false)
+      return 100;
+   return Errors == true ? 100 : 0;
+}
+									/*}}}*/
diff --git a/apt-private/private-cmndline.h b/apt-private/private-cmndline.h
new file mode 100644
index 0000000..22e25d2
--- /dev/null
+++ b/apt-private/private-cmndline.h
@@ -0,0 +1,42 @@
+#ifndef APT_PRIVATE_CMNDLINE_H
+#define APT_PRIVATE_CMNDLINE_H
+
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/macros.h>
+
+#include <vector>
+
+class Configuration;
+class pkgSystem;
+
+enum class APT_CMD {
+   APT,
+   APT_GET,
+   APT_CACHE,
+   APT_CDROM,
+   APT_CONFIG,
+   APT_EXTRACTTEMPLATES,
+   APT_FTPARCHIVE,
+   APT_HELPER,
+   APT_INTERNAL_SOLVER,
+   APT_MARK,
+   APT_SORTPKG,
+   APT_DUMP_SOLVER,
+   APT_INTERNAL_PLANNER,
+   RRED,
+};
+struct aptDispatchWithHelp
+{
+   const char *Match;
+   bool (*Handler)(CommandLine &);
+   const char *Help;
+};
+
+APT_PUBLIC std::vector<CommandLine::Dispatch> ParseCommandLine(CommandLine &CmdL, APT_CMD const Binary,
+      Configuration * const * const Cnf, pkgSystem ** const Sys, int const argc, const char * argv[],
+      bool (*ShowHelp)(CommandLine &), std::vector<aptDispatchWithHelp> (*GetCommands)(void));
+APT_PUBLIC unsigned short DispatchCommandLine(CommandLine &CmdL, std::vector<CommandLine::Dispatch> const &Cmds);
+
+APT_PUBLIC std::vector<CommandLine::Args> getCommandArgs(APT_CMD const Program, char const * const Cmd);
+
+#endif
diff --git a/apt-private/private-depends.cc b/apt-private/private-depends.cc
new file mode 100644
index 0000000..2664cc9
--- /dev/null
+++ b/apt-private/private-depends.cc
@@ -0,0 +1,151 @@
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/pkgcache.h>
+
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-depends.h>
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include <cstddef>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// ShowDepends - Helper for printing out a dependency tree		/*{{{*/
+static bool ShowDepends(CommandLine &CmdL, bool const RevDepends)
+{
+   pkgCacheFile CacheFile;
+   pkgCache * const Cache = CacheFile.GetPkgCache();
+   if (unlikely(Cache == nullptr || CacheFile.GetDepCache() == nullptr))
+      return false;
+
+   CacheSetHelperVirtuals helper(false);
+   APT::VersionList verset = APT::VersionList::FromCommandLine(CacheFile, CmdL.FileList + 1, APT::CacheSetHelper::CANDIDATE, helper);
+   if (verset.empty() == true && helper.virtualPkgs.empty() == true)
+      return _error->Error(_("No packages found"));
+   std::vector<bool> Shown(Cache->Head().PackageCount);
+
+   bool const Recurse = _config->FindB("APT::Cache::RecurseDepends", false);
+   bool const Installed = _config->FindB("APT::Cache::Installed", false);
+   bool const Important = _config->FindB("APT::Cache::Important", false);
+   bool const ShowDepType = _config->FindB("APT::Cache::ShowDependencyType", RevDepends == false);
+   bool const ShowVersion = _config->FindB("APT::Cache::ShowVersion", false);
+   bool const ShowPreDepends = _config->FindB("APT::Cache::ShowPre-Depends", true);
+   bool const ShowDepends = _config->FindB("APT::Cache::ShowDepends", true);
+   bool const ShowRecommends = _config->FindB("APT::Cache::ShowRecommends", Important == false);
+   bool const ShowSuggests = _config->FindB("APT::Cache::ShowSuggests", Important == false);
+   bool const ShowReplaces = _config->FindB("APT::Cache::ShowReplaces", Important == false);
+   bool const ShowConflicts = _config->FindB("APT::Cache::ShowConflicts", Important == false);
+   bool const ShowBreaks = _config->FindB("APT::Cache::ShowBreaks", Important == false);
+   bool const ShowEnhances = _config->FindB("APT::Cache::ShowEnhances", Important == false);
+   bool const ShowOnlyFirstOr = _config->FindB("APT::Cache::ShowOnlyFirstOr", false);
+   bool const ShowImplicit = _config->FindB("APT::Cache::ShowImplicit", false);
+
+   while (verset.empty() != true)
+   {
+      pkgCache::VerIterator Ver = *verset.begin();
+      verset.erase(verset.begin());
+      pkgCache::PkgIterator Pkg = Ver.ParentPkg();
+      Shown[Pkg->ID] = true;
+
+      std::cout << Pkg.FullName(true) << std::endl;
+
+      if (RevDepends == true)
+	 std::cout << "Reverse Depends:" << std::endl;
+      for (pkgCache::DepIterator D = RevDepends ? Pkg.RevDependsList() : Ver.DependsList();
+	    D.end() == false; ++D)
+      {
+	 switch (D->Type) {
+	    case pkgCache::Dep::PreDepends: if (!ShowPreDepends) continue; break;
+	    case pkgCache::Dep::Depends: if (!ShowDepends) continue; break;
+	    case pkgCache::Dep::Recommends: if (!ShowRecommends) continue; break;
+	    case pkgCache::Dep::Suggests: if (!ShowSuggests) continue; break;
+	    case pkgCache::Dep::Replaces: if (!ShowReplaces) continue; break;
+	    case pkgCache::Dep::Conflicts: if (!ShowConflicts) continue; break;
+	    case pkgCache::Dep::DpkgBreaks: if (!ShowBreaks) continue; break;
+	    case pkgCache::Dep::Enhances: if (!ShowEnhances) continue; break;
+	 }
+	 if (ShowImplicit == false && D.IsImplicit())
+	    continue;
+
+	 pkgCache::PkgIterator Trg = RevDepends ? D.ParentPkg() : D.TargetPkg();
+
+	 if((Installed && Trg->CurrentVer != 0) || !Installed)
+	 {
+
+	    if ((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or && ShowOnlyFirstOr == false)
+	       std::cout << " |";
+	    else
+	       std::cout << "  ";
+
+	    // Show the package
+	    if (ShowDepType == true)
+	       std::cout << D.DepType() << ": ";
+	    if (Trg->VersionList == 0)
+	       std::cout << "<" << Trg.FullName(true) << ">";
+	    else
+	       std::cout << Trg.FullName(true);
+	    if (ShowVersion == true && D->Version != 0)
+	       std::cout << " (" << pkgCache::CompTypeDeb(D->CompareOp) << ' ' << D.TargetVer() << ')';
+	    std::cout << std::endl;
+
+	    if (Recurse == true && Shown[Trg->ID] == false)
+	    {
+	       Shown[Trg->ID] = true;
+	       verset.insert(APT::VersionSet::FromPackage(CacheFile, Trg, APT::CacheSetHelper::CANDIDATE, helper));
+	    }
+
+	    // Display all solutions
+	    std::unique_ptr<pkgCache::Version *[]> List(D.AllTargets());
+	    pkgPrioSortList(*Cache,List.get());
+	    for (pkgCache::Version **I = List.get(); *I != 0; I++)
+	    {
+	       pkgCache::VerIterator V(*Cache,*I);
+	       if (V != Cache->VerP + V.ParentPkg()->VersionList ||
+		   V->ParentPkg == D->Package)
+		  continue;
+	       std::cout << "    " << V.ParentPkg().FullName(true) << std::endl;
+
+	       if (Recurse == true && Shown[V.ParentPkg()->ID] == false)
+	       {
+		  Shown[V.ParentPkg()->ID] = true;
+		  verset.insert(APT::VersionSet::FromPackage(CacheFile, V.ParentPkg(), APT::CacheSetHelper::CANDIDATE, helper));
+	       }
+	    }
+
+	 }
+
+	 if (ShowOnlyFirstOr == true)
+	    while ((D->CompareOp & pkgCache::Dep::Or) == pkgCache::Dep::Or) ++D;
+      }
+   }
+
+   for (APT::PackageSet::const_iterator Pkg = helper.virtualPkgs.begin();
+	 Pkg != helper.virtualPkgs.end(); ++Pkg)
+      std::cout << '<' << Pkg.FullName(true) << '>' << std::endl;
+
+   return true;
+}
+									/*}}}*/
+// Depends - Print out a dependency tree				/*{{{*/
+bool Depends(CommandLine &CmdL)
+{
+   return ShowDepends(CmdL, false);
+}
+									/*}}}*/
+// RDepends - Print out a reverse dependency tree			/*{{{*/
+bool RDepends(CommandLine &CmdL)
+{
+   return ShowDepends(CmdL, true);
+}
+									/*}}}*/
diff --git a/apt-private/private-depends.h b/apt-private/private-depends.h
new file mode 100644
index 0000000..e9f703d
--- /dev/null
+++ b/apt-private/private-depends.h
@@ -0,0 +1,11 @@
+#ifndef APT_PRIVATE_DEPENDS_H
+#define APT_PRIVATE_DEPENDS_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool Depends(CommandLine &CmdL);
+APT_PUBLIC bool RDepends(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-download.cc b/apt-private/private-download.cc
new file mode 100644
index 0000000..3f473b8
--- /dev/null
+++ b/apt-private/private-download.cc
@@ -0,0 +1,393 @@
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/clean.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/acqprogress.h>
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-download.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-utils.h>
+
+#include <fstream>
+#include <string>
+#include <vector>
+
+#include <fcntl.h>
+#include <pwd.h>
+#include <sys/types.h>
+#include <unistd.h>
+#ifdef HAVE_VFS_H
+#include <sys/vfs.h>
+#else
+#ifdef HAVE_PARAMS_H
+#include <sys/params.h>
+#endif
+#include <sys/mount.h>
+#endif
+#include <cerrno>
+#include <sys/stat.h>
+#include <sys/statvfs.h>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// CheckAuth - check if each download comes form a trusted source	/*{{{*/
+bool CheckAuth(pkgAcquire& Fetcher, bool const PromptUser)
+{
+   std::vector<std::string> UntrustedList;
+   for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); I < Fetcher.ItemsEnd(); ++I)
+      if (!(*I)->IsTrusted())
+	 UntrustedList.push_back((*I)->ShortDesc());
+
+   if (UntrustedList.empty())
+      return true;
+
+   return AuthPrompt(UntrustedList, PromptUser);
+}
+									/*}}}*/
+bool AuthPrompt(std::vector<std::string> const &UntrustedList, bool const PromptUser)/*{{{*/
+{
+   ShowList(c2out,_("WARNING: The following packages cannot be authenticated!"), UntrustedList,
+	 [](std::string const&) { return true; },
+	 [](std::string const&str) { return str; },
+	 [](std::string const&) { return ""; });
+
+   if (_config->FindB("APT::Get::AllowUnauthenticated",false) == true)
+   {
+      c2out << _("Authentication warning overridden.\n");
+      return true;
+   }
+
+   if (PromptUser == false)
+      return _error->Error(_("Some packages could not be authenticated"));
+
+   if (_config->FindI("quiet",0) < 2
+       && _config->FindB("APT::Get::Assume-Yes",false) == false)
+   {
+      if (!YnPrompt(_("Install these packages without verification?"), false))
+         return _error->Error(_("Some packages could not be authenticated"));
+
+      return true;
+   }
+   else if (_config->FindB("APT::Get::Force-Yes",false) == true) {
+      return true;
+   }
+
+   return _error->Error(_("There were unauthenticated packages and -y was used without --allow-unauthenticated"));
+}
+									/*}}}*/
+bool AcquireRun(pkgAcquire &Fetcher, int const PulseInterval, bool * const Failure, bool * const TransientNetworkFailure)/*{{{*/
+{
+   pkgAcquire::RunResult res;
+   if(PulseInterval > 0)
+      res = Fetcher.Run(PulseInterval);
+   else
+      res = Fetcher.Run();
+
+   if (res == pkgAcquire::Failed)
+      return false;
+
+   for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin();
+	I != Fetcher.ItemsEnd(); ++I)
+   {
+
+      if ((*I)->Status == pkgAcquire::Item::StatDone &&
+	    (*I)->Complete == true)
+	 continue;
+
+      if (TransientNetworkFailure != NULL && (*I)->Status == pkgAcquire::Item::StatIdle)
+      {
+	 *TransientNetworkFailure = true;
+	 continue;
+      }
+
+      ::URI uri((*I)->DescURI());
+      uri.User.clear();
+      uri.Password.clear();
+      std::string descUri = std::string(uri);
+      _error->Error(_("Failed to fetch %s  %s"), descUri.c_str(),
+	    (*I)->ErrorText.c_str());
+
+      if (Failure != NULL)
+	 *Failure = true;
+   }
+
+   return true;
+}
+									/*}}}*/
+bool CheckFreeSpaceBeforeDownload(std::string const &Dir, unsigned long long FetchBytes)/*{{{*/
+{
+   uint32_t const RAMFS_MAGIC = 0x858458f6;
+   /* Check for enough free space, but only if we are actually going to
+      download */
+   if (_config->FindB("APT::Get::Print-URIs", false) == true ||
+       _config->FindB("APT::Get::Download", true) == false)
+      return true;
+
+   struct statvfs Buf;
+   if (statvfs(Dir.c_str(),&Buf) != 0) {
+      if (errno == EOVERFLOW)
+	 return _error->WarningE("statvfs",_("Couldn't determine free space in %s"),
+	       Dir.c_str());
+      else
+	 return _error->Errno("statvfs",_("Couldn't determine free space in %s"),
+	       Dir.c_str());
+   }
+   else
+   {
+      unsigned long long const FreeBlocks = _config->Find("APT::Sandbox::User").empty() ? Buf.f_bfree : Buf.f_bavail;
+      if (FreeBlocks < (FetchBytes / Buf.f_bsize))
+      {
+	 struct statfs Stat;
+	 if (statfs(Dir.c_str(),&Stat) != 0
+#ifdef HAVE_STRUCT_STATFS_F_TYPE
+	       || Stat.f_type != RAMFS_MAGIC
+#endif
+	    )
+	    return _error->Error(_("You don't have enough free space in %s."),
+		  Dir.c_str());
+      }
+   }
+   return true;
+}
+									/*}}}*/
+
+aptAcquireWithTextStatus::aptAcquireWithTextStatus() : pkgAcquire::pkgAcquire(),
+   Stat(std::cout, ScreenWidth, _config->FindI("quiet",0))
+{
+   SetLog(&Stat);
+}
+
+// DoDownload - download a binary					/*{{{*/
+bool DoDownload(CommandLine &CmdL)
+{
+   CacheFile Cache;
+   if (Cache.ReadOnlyOpen() == false)
+      return false;
+
+   APT::CacheSetHelper helper;
+   APT::VersionSet verset = APT::VersionSet::FromCommandLine(Cache,
+		CmdL.FileList + 1, APT::CacheSetHelper::CANDIDATE, helper);
+
+   if (verset.empty() == true)
+      return false;
+
+   pkgRecords Recs(Cache);
+   pkgSourceList *SrcList = Cache.GetSourceList();
+
+   // reuse the usual acquire methods for deb files, but don't drop them into
+   // the usual directories - keep everything in the current directory
+   aptAcquireWithTextStatus Fetcher;
+   std::vector<std::string> storefile(verset.size());
+   std::string const cwd = SafeGetCWD();
+   _config->Set("Dir::Cache::Archives", cwd);
+   int i = 0;
+   for (APT::VersionSet::const_iterator Ver = verset.begin();
+	 Ver != verset.end(); ++Ver, ++i)
+   {
+      pkgAcquire::Item *I = new pkgAcqArchive(&Fetcher, SrcList, &Recs, *Ver, storefile[i]);
+      if (storefile[i].empty())
+	 continue;
+      std::string const filename = cwd + flNotDir(storefile[i]);
+      storefile[i].assign(filename);
+      I->DestFile.assign(filename);
+   }
+
+   // Just print out the uris and exit if the --print-uris flag was used
+   if (_config->FindB("APT::Get::Print-URIs") == true)
+   {
+      pkgAcquire::UriIterator I = Fetcher.UriBegin();
+      for (; I != Fetcher.UriEnd(); ++I)
+	 std::cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile)  << ' ' <<
+	       I->Owner->FileSize << ' ' << I->Owner->HashSum() << std::endl;
+      return true;
+   }
+   auto const storecopy = storefile;
+
+   if (_error->PendingError() == true || CheckAuth(Fetcher, false) == false)
+      return false;
+
+   bool Failed = false;
+   if (AcquireRun(Fetcher, 0, &Failed, NULL) == false)
+      return false;
+
+   // copy files in local sources to the current directory
+   i = 0;
+   for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); I != Fetcher.ItemsEnd(); ++I)
+   {
+      if (dynamic_cast<pkgAcqArchive*>(*I) == nullptr)
+	 continue;
+
+      if ((*I)->Local == true &&
+	  (*I)->Status == pkgAcquire::Item::StatDone &&
+	  (*I)->DestFile != storecopy[i])
+      {
+	 std::ifstream src((*I)->DestFile.c_str(), std::ios::binary);
+	 std::ofstream dst(storecopy[i].c_str(), std::ios::binary);
+	 dst << src.rdbuf();
+	 chmod(storecopy[i].c_str(), 0644);
+      }
+      ++i;
+   }
+   return Failed == false;
+}
+									/*}}}*/
+// DoChangelog - Get changelog from the command line			/*{{{*/
+bool DoChangelog(CommandLine &CmdL)
+{
+   CacheFile Cache;
+   if (Cache.ReadOnlyOpen() == false)
+      return false;
+
+   APT::CacheSetHelper helper;
+   APT::VersionList verset = APT::VersionList::FromCommandLine(Cache,
+		CmdL.FileList + 1, APT::CacheSetHelper::CANDIDATE, helper);
+   if (verset.empty() == true)
+      return _error->Error(_("No packages found"));
+
+   bool const downOnly = _config->FindB("APT::Get::Download-Only", false);
+   bool const printOnly = _config->FindB("APT::Get::Print-URIs", false);
+   if (printOnly)
+      _config->CndSet("Acquire::Changelogs::AlwaysOnline", true);
+
+   aptAcquireWithTextStatus Fetcher;
+   for (APT::VersionList::const_iterator Ver = verset.begin();
+        Ver != verset.end();
+        ++Ver)
+   {
+      if (printOnly)
+	 new pkgAcqChangelog(&Fetcher, Ver, "/dev/null");
+      else if (downOnly)
+	 new pkgAcqChangelog(&Fetcher, Ver, ".");
+      else
+	 new pkgAcqChangelog(&Fetcher, Ver);
+   }
+
+   if (printOnly == false)
+   {
+      bool Failed = false;
+      if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
+	 return false;
+   }
+
+   if (downOnly == false || printOnly == true)
+   {
+      bool Failed = false;
+      for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); I != Fetcher.ItemsEnd(); ++I)
+      {
+	 if (printOnly)
+	 {
+	    if ((*I)->ErrorText.empty() == false)
+	    {
+	       Failed = true;
+	       _error->Error("%s", (*I)->ErrorText.c_str());
+	    }
+	    else
+	       std::cout << '\'' << (*I)->DescURI() << "' " << flNotDir((*I)->DestFile)  << std::endl;
+	 }
+	 else
+	    DisplayFileInPager((*I)->DestFile);
+      }
+      return Failed == false;
+   }
+
+   return true;
+}
+									/*}}}*/
+// DoClean & DoDistClean - Remove download archives and/or lists	/*{{{*/
+static bool CleanDownloadDirectories(bool const ListsToo)
+{
+   std::string const archivedir = _config->FindDir("Dir::Cache::archives");
+   std::string const listsdir = _config->FindDir("Dir::state::lists");
+
+   if (_config->FindB("APT::Get::Simulate") == true)
+   {
+      std::string const pkgcache = _config->FindFile("Dir::cache::pkgcache");
+      std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
+      std::cout << "Del " << archivedir << "* " << archivedir << "partial/*" << std::endl
+		<< "Del " << listsdir << "partial/*" << std::endl;
+      if (ListsToo)
+	 std::cout << "Del " << listsdir << "*_{Packages,Sources,Translation-*}" << std::endl;
+      std::cout << "Del " << pkgcache << " " << srcpkgcache << std::endl;
+      return true;
+   }
+
+   pkgAcquire Fetcher;
+   if (not archivedir.empty() && FileExists(archivedir) &&
+       Fetcher.GetLock(archivedir))
+   {
+      Fetcher.Clean(archivedir);
+      Fetcher.Clean(archivedir + "partial/");
+   }
+
+   if (not listsdir.empty() && FileExists(listsdir) &&
+       Fetcher.GetLock(listsdir))
+   {
+      Fetcher.Clean(listsdir + "partial/");
+      if (ListsToo)
+         Fetcher.CleanLists(listsdir);
+   }
+
+   pkgCacheFile::RemoveCaches();
+
+   return true;
+}
+bool DoClean(CommandLine &)
+{
+   return CleanDownloadDirectories(false);
+}
+bool DoDistClean(CommandLine &)
+{
+   return CleanDownloadDirectories(true);
+}
+									/*}}}*/
+// DoAutoClean - Smartly remove downloaded archives			/*{{{*/
+// ---------------------------------------------------------------------
+/* This is similar to clean but it only purges things that cannot be 
+   downloaded, that is old versions of cached packages. */
+ class LogCleaner : public pkgArchiveCleaner
+{
+   protected:
+      virtual void Erase(int const dirfd, char const * const File, std::string const &Pkg, std::string const &Ver,struct stat const &St) APT_OVERRIDE
+      {
+	 c1out << "Del " << Pkg << " " << Ver << " [" << SizeToStr(St.st_size) << "B]" << std::endl;
+
+	 if (_config->FindB("APT::Get::Simulate") == false)
+	    RemoveFileAt("Cleaner::Erase", dirfd, File);
+      };
+};
+bool DoAutoClean(CommandLine &)
+{
+   std::string const archivedir = _config->FindDir("Dir::Cache::Archives");
+   if (FileExists(archivedir) == false)
+      return true;
+
+   // Lock the archive directory
+   FileFd Lock;
+   if (_config->FindB("Debug::NoLocking",false) == false)
+   {
+      int lock_fd = GetLock(flCombine(archivedir, "lock"));
+      if (lock_fd < 0)
+	 return _error->Error(_("Unable to lock the download directory"));
+      Lock.Fd(lock_fd);
+   }
+
+   CacheFile Cache;
+   if (Cache.Open(false) == false)
+      return false;
+
+   LogCleaner Cleaner;
+
+   return Cleaner.Go(archivedir, *Cache) &&
+      Cleaner.Go(flCombine(archivedir, "partial/"), *Cache);
+}
+									/*}}}*/
diff --git a/apt-private/private-download.h b/apt-private/private-download.h
new file mode 100644
index 0000000..e13ade1
--- /dev/null
+++ b/apt-private/private-download.h
@@ -0,0 +1,39 @@
+#ifndef APT_PRIVATE_DOWNLOAD_H
+#define APT_PRIVATE_DOWNLOAD_H
+
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/macros.h>
+
+#include <apt-private/acqprogress.h>
+
+#include <string>
+#include <vector>
+
+// Check if all files in the fetcher are authenticated
+bool CheckAuth(pkgAcquire& Fetcher, bool const PromptUser);
+
+// show a authentication warning prompt and return true if the system
+// should continue
+bool AuthPrompt(std::vector<std::string> const &UntrustedList, bool const PromptUser);
+
+APT_PUBLIC bool AcquireRun(pkgAcquire &Fetcher, int const PulseInterval, bool * const Failure, bool * const TransientNetworkFailure);
+
+bool CheckFreeSpaceBeforeDownload(std::string const &Dir, unsigned long long FetchBytes);
+
+class APT_PUBLIC aptAcquireWithTextStatus : public pkgAcquire
+{
+   AcqTextStatus Stat;
+public:
+   aptAcquireWithTextStatus();
+};
+
+class CommandLine;
+
+APT_PUBLIC bool DoDownload(CommandLine &CmdL);
+APT_PUBLIC bool DoChangelog(CommandLine &CmdL);
+
+APT_PUBLIC bool DoClean(CommandLine &CmdL);
+APT_PUBLIC bool DoDistClean(CommandLine &CmdL);
+APT_PUBLIC bool DoAutoClean(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-install.cc b/apt-private/private-install.cc
new file mode 100644
index 0000000..254d934
--- /dev/null
+++ b/apt-private/private-install.cc
@@ -0,0 +1,1205 @@
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/install-progress.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/packagemanager.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/prettyprinters.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/upgrade.h>
+
+#include <algorithm>
+#include <cstdlib>
+#include <cstring>
+#include <iostream>
+#include <map>
+#include <set>
+#include <vector>
+
+#include <apt-private/acqprogress.h>
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-download.h>
+#include <apt-private/private-install.h>
+#include <apt-private/private-json-hooks.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-update.h>
+
+#include <apti18n.h>
+									/*}}}*/
+class pkgSourceList;
+
+bool CheckNothingBroken(CacheFile &Cache)				/*{{{*/
+{
+   // Now we check the state of the packages,
+   if (Cache->BrokenCount() == 0)
+      return true;
+
+   // FIXME: if an external solver showed an error, we shouldn't show one here
+   if (_error->PendingError() && _config->Find("APT::Solver") == "dump")
+      return false;
+
+   c1out <<
+      _("Some packages could not be installed. This may mean that you have\n"
+	    "requested an impossible situation or if you are using the unstable\n"
+	    "distribution that some required packages have not yet been created\n"
+	    "or been moved out of Incoming.") << std::endl;
+   /*
+   if (Packages == 1)
+   {
+      c1out << std::endl;
+      c1out <<
+	 _("Since you only requested a single operation it is extremely likely that\n"
+	       "the package is simply not installable and a bug report against\n"
+	       "that package should be filed.") << std::endl;
+   }
+   */
+
+   c1out << _("The following information may help to resolve the situation:") << std::endl;
+   c1out << std::endl;
+   ShowBroken(c1out,Cache,false);
+   if (_error->PendingError() == true)
+      return false;
+   else
+      return _error->Error(_("Broken packages"));
+}
+									/*}}}*/
+// InstallPackages - Actually download and install the packages		/*{{{*/
+// ---------------------------------------------------------------------
+/* This displays the informative messages describing what is going to 
+   happen and then calls the download routines */
+class SimulateWithActionGroupInhibited : public pkgSimulate
+{
+public:
+      SimulateWithActionGroupInhibited(CacheFile &Cache) : pkgSimulate(Cache) { Sim.IncreaseActionGroupLevel(); }
+      SimulateWithActionGroupInhibited(SimulateWithActionGroupInhibited const &Cache) = delete;
+      SimulateWithActionGroupInhibited(SimulateWithActionGroupInhibited &&Cache) = delete;
+      SimulateWithActionGroupInhibited& operator=(SimulateWithActionGroupInhibited const &Cache) = delete;
+      SimulateWithActionGroupInhibited& operator=(SimulateWithActionGroupInhibited &&Cache) = delete;
+      ~SimulateWithActionGroupInhibited() = default;
+};
+static void RemoveDownloadNeedingItemsFromFetcher(pkgAcquire &Fetcher, bool &Transient)
+{
+   for (pkgAcquire::ItemIterator I = Fetcher.ItemsBegin(); I < Fetcher.ItemsEnd();)
+   {
+      if ((*I)->Local == true)
+      {
+	 ++I;
+	 continue;
+      }
+
+      // Close the item and check if it was found in cache
+      (*I)->Finished();
+      if ((*I)->Complete == false)
+	 Transient = true;
+
+      // Clear it out of the fetch list
+      delete *I;
+      I = Fetcher.ItemsBegin();
+   }
+}
+#ifdef REQUIRE_MERGED_USR
+// \brief Issues a warning about usrmerge when destructed so we can call it after install finished or failed or whatever.
+struct WarnUsrMerge {
+   CacheFile &Cache;
+   WarnUsrMerge(CacheFile &Cache) : Cache(Cache) {
+
+   }
+   void warn() {
+      auto usrmergePkg = Cache->FindPkg("usrmerge");
+      if (not APT::Configuration::isChroot() && _config->FindDir("Dir") == std::string("/") &&
+	  not usrmergePkg.end() && not usrmergePkg.VersionList().end() &&
+	  not Cache[usrmergePkg].Install() && not APT::Configuration::checkUsrMerged())
+      {
+	 _error->Warning(_("Unmerged usr is no longer supported, use usrmerge to convert to a merged-usr system."));
+	 for (auto VF = usrmergePkg.VersionList().FileList(); not VF.end(); ++VF)
+	    if (VF.File().Origin() != nullptr && VF.File().Origin() == std::string("Debian"))
+	    {
+	       // TRANSLATORS: %s is a url to a page describing merged-usr (bookworm release notes)
+	       _error->Notice(_("See %s for more details."), "https://www.debian.org/releases/bookworm/amd64/release-notes/ch-information.en.html#a-merged-usr-is-now-required");
+	       break;
+	    }
+      }
+   }
+   ~WarnUsrMerge() {
+      warn();
+   }
+};
+#endif
+bool InstallPackages(CacheFile &Cache, APT::PackageVector &HeldBackPackages, bool ShwKept, bool Ask, bool Safety, std::string const &Hook, CommandLine const &CmdL)
+{
+#ifdef REQUIRE_MERGED_USR
+   WarnUsrMerge warnUsrMerge(Cache);
+#endif
+   if (not RunScripts("APT::Install::Pre-Invoke"))
+      return false;
+   if (_config->FindB("APT::Get::Purge", false) == true)
+      for (pkgCache::PkgIterator I = Cache->PkgBegin(); I.end() == false; ++I)
+	 if (Cache[I].Delete() == true && Cache[I].Purge() == false)
+	    Cache->MarkDelete(I,true);
+
+   // Create the download object
+   auto const DownloadAllowed = _config->FindB("APT::Get::Download",true);
+   aptAcquireWithTextStatus Fetcher;
+   if (_config->FindB("APT::Get::Print-URIs", false) == true)
+   {
+      // force a hashsum for compatibility reasons
+      _config->CndSet("Acquire::ForceHash", "md5sum");
+   }
+   else if (_config->FindB("APT::Get::Simulate") == true)
+      ;
+   else if (Fetcher.GetLock(_config->FindDir("Dir::Cache::Archives")) == false)
+      return false;
+
+   // Read the source list
+   if (Cache.BuildSourceList() == false)
+      return false;
+   pkgSourceList * const List = Cache.GetSourceList();
+
+   // Create the text record parser
+   pkgRecords Recs(Cache);
+   if (_error->PendingError() == true)
+      return false;
+
+   // Create the package manager and prepare to download
+   std::unique_ptr<pkgPackageManager> PM(_system->CreatePM(Cache));
+   if (PM->GetArchives(&Fetcher,List,&Recs) == false || 
+       _error->PendingError() == true)
+      return false;
+
+   if (DownloadAllowed == false)
+   {
+      bool Missing = false;
+      RemoveDownloadNeedingItemsFromFetcher(Fetcher, Missing);
+      if (Missing)
+      {
+	 if (_config->FindB("APT::Get::Fix-Missing",false))
+	 {
+	    PM->FixMissing();
+	    SortedPackageUniverse Universe(Cache);
+	    APT::PackageVector NewHeldBackPackages;
+	    for (auto const &Pkg: Universe)
+	    {
+	       if (Pkg->CurrentVer == 0 || Cache[Pkg].Delete())
+		  continue;
+	       if (Cache[Pkg].Upgradable() && not Cache[Pkg].Upgrade())
+		  NewHeldBackPackages.push_back(Pkg);
+	       else if (std::find(HeldBackPackages.begin(), HeldBackPackages.end(), Pkg) != HeldBackPackages.end())
+		  NewHeldBackPackages.push_back(Pkg);
+	    }
+	    std::swap(NewHeldBackPackages, HeldBackPackages);
+	 }
+	 else
+	    return _error->Error(_("Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?"));
+      }
+      Fetcher.Shutdown();
+      if (_error->PendingError() == true)
+	 return false;
+   }
+
+   APT::PackageVector PhasingPackages;
+   APT::PackageVector NotPhasingHeldBackPackages;
+   for (auto const &Pkg : HeldBackPackages)
+   {
+      if (Cache->PhasingApplied(Pkg))
+	 PhasingPackages.push_back(Pkg);
+      else
+	 NotPhasingHeldBackPackages.push_back(Pkg);
+   }
+
+   // Show all the various warning indicators
+   ShowDel(c1out,Cache);
+   ShowNew(c1out,Cache);
+   if (ShwKept == true)
+   {
+      ShowPhasing(c1out, Cache, PhasingPackages);
+      ShowKept(c1out, Cache, NotPhasingHeldBackPackages);
+      if (not PhasingPackages.empty() && not NotPhasingHeldBackPackages.empty())
+	 _error->Notice("Some packages may have been kept back due to phasing.");
+   }
+   bool const Hold = not ShowHold(c1out,Cache);
+   if (_config->FindB("APT::Get::Show-Upgraded",true) == true)
+      ShowUpgraded(c1out,Cache);
+   bool const Downgrade = !ShowDowngraded(c1out,Cache);
+
+   bool Essential = false;
+   if (_config->FindB("APT::Get::Download-Only",false) == false)
+        Essential = !ShowEssential(c1out,Cache);
+
+   if (not Hook.empty())
+      RunJsonHook(Hook, "org.debian.apt.hooks.install.package-list", CmdL.FileList, Cache);
+
+   Stats(c1out,Cache, HeldBackPackages);
+   if (not Hook.empty())
+      RunJsonHook(Hook, "org.debian.apt.hooks.install.statistics", CmdL.FileList, Cache);
+
+   // Sanity check
+   if (Cache->BrokenCount() != 0)
+   {
+      ShowBroken(c1out,Cache,false);
+      return _error->Error(_("Internal error, InstallPackages was called with broken packages!"));
+   }
+
+   if (Cache->DelCount() == 0 && Cache->InstCount() == 0 &&
+       Cache->BadCount() == 0)
+      return RunScripts("APT::Install::Post-Invoke-Success");
+
+   // No remove flag
+   if (Cache->DelCount() != 0 && _config->FindB("APT::Get::Remove",true) == false)
+      return _error->Error(_("Packages need to be removed but remove is disabled."));
+
+#ifdef REQUIRE_MERGED_USR
+   warnUsrMerge.warn();
+#endif
+
+   // Fail safe check
+   bool const Fail = (Essential || Downgrade || Hold);
+   if (_config->FindI("quiet",0) >= 2 ||
+       _config->FindB("APT::Get::Assume-Yes",false) == true)
+   {
+      if (Fail == true && _config->FindB("APT::Get::Force-Yes",false) == false) {
+	 if (Essential == true && _config->FindB("APT::Get::allow-remove-essential", false) == false)
+	    return _error->Error(_("Essential packages were removed and -y was used without --allow-remove-essential."));
+	 if (Downgrade == true && _config->FindB("APT::Get::allow-downgrades", false) == false)
+	    return _error->Error(_("Packages were downgraded and -y was used without --allow-downgrades."));
+	 if (Hold == true && _config->FindB("APT::Get::allow-change-held-packages", false) == false)
+	    return _error->Error(_("Held packages were changed and -y was used without --allow-change-held-packages."));
+      }
+   }
+
+   // Run the simulator ..
+   if (_config->FindB("APT::Get::Simulate") == true)
+   {
+      SimulateWithActionGroupInhibited PM(Cache);
+
+      APT::Progress::PackageManager *progress = APT::Progress::PackageManagerProgressFactory();
+      pkgPackageManager::OrderResult Res = PM.DoInstall(progress);
+      delete progress;
+
+      if (Res == pkgPackageManager::Failed)
+	 return false;
+      if (Res != pkgPackageManager::Completed)
+	 return _error->Error(_("Internal error, Ordering didn't finish"));
+      return true;
+   }
+
+   auto const FetchBytes = DownloadAllowed ? Fetcher.FetchNeeded() : 0;
+   auto const FetchPBytes = DownloadAllowed ? Fetcher.PartialPresent() : 0;
+   if (DownloadAllowed)
+   {
+      // Display statistics
+      auto const DebBytes = Fetcher.TotalNeeded();
+      if (DebBytes != Cache->DebSize())
+      {
+	 c0out << "E: " << DebBytes << ',' << Cache->DebSize() << std::endl;
+	 c0out << "E: " << _("How odd... The sizes didn't match, email apt@packages.debian.org") << std::endl;
+      }
+
+      // Number of bytes
+      if (DebBytes != FetchBytes)
+	 //TRANSLATOR: The required space between number and unit is already included
+	 // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
+	 ioprintf(c1out,_("Need to get %sB/%sB of archives.\n"),
+	       SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
+      else if (DebBytes != 0)
+	 //TRANSLATOR: The required space between number and unit is already included
+	 // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
+	 ioprintf(c1out,_("Need to get %sB of archives.\n"),
+	       SizeToStr(DebBytes).c_str());
+   }
+
+   // Size delta
+   if (Cache->UsrSize() >= 0)
+      //TRANSLATOR: The required space between number and unit is already included
+      // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
+      ioprintf(c1out,_("After this operation, %sB of additional disk space will be used.\n"),
+	       SizeToStr(Cache->UsrSize()).c_str());
+   else
+      //TRANSLATOR: The required space between number and unit is already included
+      // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
+      ioprintf(c1out,_("After this operation, %sB disk space will be freed.\n"),
+	       SizeToStr(-1*Cache->UsrSize()).c_str());
+
+   if (DownloadAllowed)
+      if (CheckFreeSpaceBeforeDownload(_config->FindDir("Dir::Cache::Archives"), (FetchBytes - FetchPBytes)) == false)
+	 return false;
+
+   if (_error->PendingError() == true)
+      return false;
+
+   // Just print out the uris an exit if the --print-uris flag was used
+   if (_config->FindB("APT::Get::Print-URIs") == true)
+   {
+      pkgAcquire::UriIterator I = Fetcher.UriBegin();
+      for (; I != Fetcher.UriEnd(); ++I)
+	 std::cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
+	       std::to_string(I->Owner->FileSize) << ' ' << I->Owner->HashSum() << std::endl;
+      return true;
+   }
+
+   if (Essential == true && Safety == true && _config->FindB("APT::Get::allow-remove-essential", false) == false)
+   {
+      if (_config->FindB("APT::Get::Trivial-Only",false) == true)
+	 return _error->Error(_("Trivial Only specified but this is not a trivial operation."));
+
+      return _error->Error(_("Removing essential system-critical packages is not permitted. This might break the system."));
+   }
+   else
+   {
+      // Prompt to continue
+      if (Ask == true || Fail == true)
+      {
+	 if (_config->FindB("APT::Get::Trivial-Only",false) == true)
+	    return _error->Error(_("Trivial Only specified but this is not a trivial operation."));
+
+	 if (_config->FindI("quiet",0) < 2 &&
+	     _config->FindB("APT::Get::Assume-Yes",false) == false)
+	 {
+	    if (YnPrompt(_("Do you want to continue?")) == false)
+	    {
+	       c2out << _("Abort.") << std::endl;
+	       exit(1);
+	    }
+	 }
+      }
+   }
+
+   if (!CheckAuth(Fetcher, true))
+      return false;
+
+   /* Unlock the dpkg lock if we are not going to be doing an install
+      after. */
+   if (_config->FindB("APT::Get::Download-Only",false) == true)
+      _system->UnLock();
+
+   // Run it
+   bool Failed = false;
+   while (1)
+   {
+      bool Transient = false;
+      if (AcquireRun(Fetcher, 0, &Failed, &Transient) == false)
+	 return false;
+
+      if (_config->FindB("APT::Get::Download-Only",false) == true)
+      {
+	 if (Failed == true && _config->FindB("APT::Get::Fix-Missing",false) == false)
+	    return _error->Error(_("Some files failed to download"));
+	 c1out << _("Download complete and in download only mode") << std::endl;
+	 return true;
+      }
+
+      if (Failed == true && _config->FindB("APT::Get::Fix-Missing",false) == false)
+	 return _error->Error(_("Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?"));
+
+      if (Transient == true && Failed == true)
+	 return _error->Error(_("--fix-missing and media swapping is not currently supported"));
+
+      // Try to deal with missing package files
+      if (Failed == true && PM->FixMissing() == false)
+      {
+	 c2out << _("Unable to correct missing packages.") << std::endl;
+	 return _error->Error(_("Aborting install."));
+      }
+
+      auto const progress = APT::Progress::PackageManagerProgressFactory();
+      _system->UnLockInner();
+      pkgPackageManager::OrderResult const Res = PM->DoInstall(progress);
+      delete progress;
+
+      if (Res == pkgPackageManager::Failed || _error->PendingError() == true)
+	 return false;
+      if (Res == pkgPackageManager::Completed)
+	 break;
+
+      _system->LockInner();
+
+      // Reload the fetcher object and loop again for media swapping
+      Fetcher.Shutdown();
+      if (PM->GetArchives(&Fetcher,List,&Recs) == false)
+	 return false;
+
+      Failed = false;
+      if (DownloadAllowed == false)
+	 RemoveDownloadNeedingItemsFromFetcher(Fetcher, Failed);
+   }
+
+   std::set<std::string> const disappearedPkgs = PM->GetDisappearedPackages();
+   if (disappearedPkgs.empty() == false)
+   {
+      ShowList(c1out, P_("The following package disappeared from your system as\n"
+	       "all files have been overwritten by other packages:",
+	       "The following packages disappeared from your system as\n"
+	       "all files have been overwritten by other packages:", disappearedPkgs.size()), disappearedPkgs,
+	    [](std::string const &Pkg) { return Pkg.empty() == false; },
+	    [](std::string const &Pkg) { return Pkg; },
+	    [](std::string const &) { return std::string(); });
+      c0out << _("Note: This is done automatically and on purpose by dpkg.") << std::endl;
+   }
+
+   // cleanup downloaded debs
+   if (_config->FindB("APT::Keep-Downloaded-Packages", true) == false)
+   {
+      std::string const archivedir = _config->FindDir("Dir::Cache::archives");
+      for (auto I = Fetcher.ItemsBegin(); I != Fetcher.ItemsEnd(); ++I)
+      {
+	 if (flNotFile((*I)->DestFile) != archivedir || (*I)->Local)
+	    continue;
+         RemoveFile("Keep-Downloaded-Packages=false", (*I)->DestFile);
+      }
+   }
+
+   if (not RunScripts("APT::Install::Post-Invoke-Success"))
+      return false;
+
+   return true;
+}
+									/*}}}*/
+// DoAutomaticRemove - Remove all automatic unused packages		/*{{{*/
+// ---------------------------------------------------------------------
+/* Remove unused automatic packages */
+bool DoAutomaticRemove(CacheFile &Cache)
+{
+   bool Debug = _config->FindB("Debug::pkgAutoRemove",false);
+   bool doAutoRemove = _config->FindB("APT::Get::AutomaticRemove", false);
+   bool doAutoRemoveKernels = _config->FindB("APT::Get::AutomaticRemove::Kernels", false);
+   bool hideAutoRemove = _config->FindB("APT::Get::HideAutoRemove");
+
+   std::unique_ptr<APT::CacheFilter::Matcher> kernelAutoremovalMatcher;
+   if (doAutoRemoveKernels && !doAutoRemove)
+   {
+      kernelAutoremovalMatcher = APT::KernelAutoRemoveHelper::GetProtectedKernelsFilter(Cache, true);
+   }
+
+   if(Debug)
+      std::cout << "DoAutomaticRemove()" << std::endl;
+
+   if (doAutoRemove == true &&
+	_config->FindB("APT::Get::Remove",true) == false)
+   {
+      c1out << _("We are not supposed to delete stuff, can't start "
+		 "AutoRemover") << std::endl;
+      return false;
+   }
+   Cache->MarkAndSweep();
+
+   bool purgePkgs = _config->FindB("APT::Get::Purge", false);
+   bool smallList = (hideAutoRemove == false &&
+		strcasecmp(_config->Find("APT::Get::HideAutoRemove","").c_str(),"small") == 0);
+
+   unsigned long autoRemoveCount = 0;
+   APT::PackageSet tooMuch;
+   SortedPackageUniverse Universe(Cache);
+   // look over the cache to see what can be removed
+   for (auto const &Pkg: Universe)
+   {
+      if (Cache[Pkg].Garbage)
+      {
+	 if(Pkg.CurrentVer() != 0 || Cache[Pkg].Install())
+	    if(Debug)
+	       std::cout << "We could delete " <<  APT::PrettyPkg(Cache, Pkg) << std::endl;
+
+	 if (doAutoRemove || (kernelAutoremovalMatcher != nullptr && (*kernelAutoremovalMatcher)(Pkg)))
+	 {
+	    if(Pkg.CurrentVer() != 0 &&
+	       Pkg->CurrentState != pkgCache::State::ConfigFiles)
+	       Cache->MarkDelete(Pkg, purgePkgs, 0, false);
+	    else
+	       Cache->MarkKeep(Pkg, false, false);
+	 }
+	 else
+	 {
+	    // if the package is a new install and already garbage we don't need to
+	    // install it in the first place, so nuke it instead of show it
+	    if (Cache[Pkg].Install() == true && Pkg.CurrentVer() == 0)
+	    {
+	       tooMuch.insert(Pkg);
+	       Cache->MarkDelete(Pkg, false, 0, false);
+	    }
+	    // only show stuff in the list that is not yet marked for removal
+	    else if(hideAutoRemove == false && Cache[Pkg].Delete() == false)
+	       ++autoRemoveCount;
+	 }
+      }
+   }
+
+   // we could have removed a new dependency of a garbage package,
+   // so check if a reverse depends is broken and if so install it again.
+   if (tooMuch.empty() == false && (Cache->BrokenCount() != 0 || Cache->PolicyBrokenCount() != 0))
+   {
+      bool Changed;
+      do {
+	 Changed = false;
+	 for (APT::PackageSet::iterator Pkg = tooMuch.begin();
+	      Pkg != tooMuch.end(); ++Pkg)
+	 {
+	    APT::PackageSet too;
+	    too.insert(*Pkg);
+	    for (pkgCache::PrvIterator Prv = Cache[Pkg].CandidateVerIter(Cache).ProvidesList();
+		 Prv.end() == false; ++Prv)
+	       too.insert(Prv.ParentPkg());
+	    for (APT::PackageSet::const_iterator P = too.begin(); P != too.end(); ++P)
+	    {
+	       for (pkgCache::DepIterator R = P.RevDependsList();
+		    R.end() == false; ++R)
+	       {
+		  if (R.IsNegative() == true ||
+		      Cache->IsImportantDep(R) == false)
+		     continue;
+		 auto const RV = R.ParentVer();
+		 if (unlikely(RV.end() == true))
+		    continue;
+		 auto const RP = RV.ParentPkg();
+		 // check if that dependency comes from an interesting version
+		 if (RP.CurrentVer() == RV)
+		 {
+		    if ((*Cache)[RP].Keep() == false)
+		       continue;
+		 }
+		 else if (Cache[RP].CandidateVerIter(Cache) == RV)
+		 {
+		    if ((*Cache)[RP].NewInstall() == false && (*Cache)[RP].Upgrade() == false)
+		       continue;
+		 }
+		 else // ignore dependency from a non-candidate version
+		    continue;
+		 if (Debug == true)
+		    std::clog << "Save " << APT::PrettyPkg(Cache, Pkg) << " as another installed package depends on it: " << APT::PrettyPkg(Cache, RP) << std::endl;
+		 Cache->MarkInstall(Pkg, false, 0, false);
+		 if (hideAutoRemove == false)
+		    ++autoRemoveCount;
+		 tooMuch.erase(Pkg);
+		 Changed = true;
+		 break;
+	       }
+	       if (Changed == true)
+		  break;
+	    }
+	    if (Changed == true)
+	       break;
+	 }
+      } while (Changed == true);
+   }
+
+   // Now see if we had destroyed anything (if we had done anything)
+   if (Cache->BrokenCount() != 0)
+   {
+      c1out << _("Hmm, seems like the AutoRemover destroyed something which really\n"
+	         "shouldn't happen. Please file a bug report against apt.") << std::endl;
+      c1out << std::endl;
+      c1out << _("The following information may help to resolve the situation:") << std::endl;
+      c1out << std::endl;
+      ShowBroken(c1out,Cache,false);
+
+      return _error->Error(_("Internal Error, AutoRemover broke stuff"));
+   }
+
+   // if we don't remove them, we should show them!
+   if (doAutoRemove == false && autoRemoveCount != 0)
+   {
+      if (smallList == false)
+      {
+	 // trigger marking now so that the package list is correct
+	 Cache->MarkAndSweep();
+	 SortedPackageUniverse Universe(Cache);
+	 ShowList(c1out, P_("The following package was automatically installed and is no longer required:",
+	          "The following packages were automatically installed and are no longer required:",
+	          autoRemoveCount), Universe,
+	       [&Cache](pkgCache::PkgIterator const &Pkg) { return (*Cache)[Pkg].Garbage == true && (*Cache)[Pkg].Delete() == false; },
+	       &PrettyFullName, CandidateVersion(&Cache));
+      }
+      else
+	 ioprintf(c1out, P_("%lu package was automatically installed and is no longer required.\n",
+	          "%lu packages were automatically installed and are no longer required.\n", autoRemoveCount), autoRemoveCount);
+      std::string autocmd = "apt autoremove";
+      if (getenv("SUDO_USER") != nullptr)
+      {
+	 auto const envsudocmd = getenv("SUDO_COMMAND");
+	 auto const envshell = getenv("SHELL");
+	 if (envsudocmd == nullptr || envshell == nullptr || strcmp(envsudocmd, envshell) != 0)
+	    autocmd = "sudo " + autocmd;
+      }
+      ioprintf(c1out, P_("Use '%s' to remove it.", "Use '%s' to remove them.", autoRemoveCount), autocmd.c_str());
+      c1out << std::endl;
+   }
+   return true;
+}
+									/*}}}*/
+// DoCacheManipulationFromCommandLine					/*{{{*/
+static const unsigned short MOD_REMOVE = 1;
+static const unsigned short MOD_INSTALL = 2;
+
+bool DoCacheManipulationFromCommandLine(CommandLine &CmdL, std::vector<PseudoPkg> &VolatileCmdL, CacheFile &Cache, int UpgradeMode,
+					APT::PackageVector &HeldBackPackages)
+{
+   std::map<unsigned short, APT::VersionVector> verset;
+   std::set<std::string> UnknownPackages;
+   return DoCacheManipulationFromCommandLine(CmdL, VolatileCmdL, Cache, verset, UpgradeMode, UnknownPackages, HeldBackPackages);
+}
+bool DoCacheManipulationFromCommandLine(CommandLine &CmdL, std::vector<PseudoPkg> &VolatileCmdL, CacheFile &Cache,
+					std::map<unsigned short, APT::VersionVector> &verset, int UpgradeMode,
+					std::set<std::string> &UnknownPackages, APT::PackageVector &HeldBackPackages)
+{
+   // Enter the special broken fixing mode if the user specified arguments
+   bool BrokenFix = false;
+   if (Cache->BrokenCount() != 0)
+      BrokenFix = true;
+
+   std::unique_ptr<pkgProblemResolver> Fix(nullptr);
+   if (_config->FindB("APT::Get::CallResolver", true) == true)
+      Fix.reset(new pkgProblemResolver(Cache));
+
+   unsigned short fallback = MOD_INSTALL;
+   if (strcasecmp(CmdL.FileList[0], "reinstall") == 0)
+      _config->Set("APT::Get::ReInstall", "true");
+   else if (strcasecmp(CmdL.FileList[0],"remove") == 0)
+      fallback = MOD_REMOVE;
+   else if (strcasecmp(CmdL.FileList[0], "purge") == 0)
+   {
+      _config->Set("APT::Get::Purge", true);
+      fallback = MOD_REMOVE;
+   }
+   else if (strcasecmp(CmdL.FileList[0], "autoremove") == 0 ||
+	    strcasecmp(CmdL.FileList[0], "auto-remove") == 0)
+   {
+      _config->Set("APT::Get::AutomaticRemove", "true");
+      fallback = MOD_REMOVE;
+   }
+   else if (strcasecmp(CmdL.FileList[0], "autopurge") == 0)
+   {
+      _config->Set("APT::Get::AutomaticRemove", "true");
+      _config->Set("APT::Get::Purge", true);
+      fallback = MOD_REMOVE;
+   }
+
+   // We need to MarkAndSweep before parsing commandline so that ?garbage pattern works correctly.
+   Cache->MarkAndSweep();
+
+   std::list<APT::VersionSet::Modifier> mods;
+   mods.push_back(APT::VersionSet::Modifier(MOD_INSTALL, "+",
+		APT::VersionSet::Modifier::POSTFIX, APT::CacheSetHelper::CANDIDATE));
+   mods.push_back(APT::VersionSet::Modifier(MOD_REMOVE, "-",
+		APT::VersionSet::Modifier::POSTFIX, APT::CacheSetHelper::NEWEST));
+   CacheSetHelperAPTGet helper(c0out);
+   verset = APT::VersionVector::GroupedFromCommandLine(Cache,
+		CmdL.FileList + 1, mods, fallback, helper);
+   for (auto &vs : verset)
+   {
+      std::set<map_id_t> seen;
+      vs.second.erase(std::remove_if(vs.second.begin(), vs.second.end(), [&](auto const &p) { return not seen.insert(p->ID).second; }), vs.second.end());
+   }
+
+   for (auto const &I: VolatileCmdL)
+   {
+      pkgCache::PkgIterator const P = Cache->FindPkg(I.name);
+      if (P.end())
+	 continue;
+
+      // Set any version providing the .deb as the candidate.
+      for (auto Prv = P.ProvidesList(); Prv.end() == false; Prv++)
+      {
+	 if (I.release.empty())
+	    Cache.GetDepCache()->SetCandidateVersion(Prv.OwnerVer());
+	 else
+	    Cache.GetDepCache()->SetCandidateRelease(Prv.OwnerVer(), I.release);
+      }
+
+      // via cacheset to have our usual virtual handling
+      APT::VersionContainerInterface::FromPackage(&(verset[MOD_INSTALL]), Cache, P, APT::CacheSetHelper::CANDIDATE, helper);
+   }
+
+   UnknownPackages = helper.notFound;
+
+   if (_error->PendingError() == true)
+   {
+      helper.showVirtualPackageErrors(Cache);
+      return false;
+   }
+
+
+  TryToInstall InstallAction(Cache, Fix.get(), BrokenFix);
+  TryToRemove RemoveAction(Cache, Fix.get());
+  APT::PackageSet UpgradablePackages;
+
+   {
+      unsigned short const order[] = { MOD_REMOVE, MOD_INSTALL, 0 };
+
+      for (unsigned short i = 0; order[i] != 0; ++i)
+      {
+	 if (order[i] == MOD_INSTALL)
+	    InstallAction = std::for_each(verset[MOD_INSTALL].begin(), verset[MOD_INSTALL].end(), InstallAction);
+	 else if (order[i] == MOD_REMOVE)
+	    RemoveAction = std::for_each(verset[MOD_REMOVE].begin(), verset[MOD_REMOVE].end(), RemoveAction);
+      }
+
+      {
+	 APT::CacheSetHelper helper;
+	 helper.PackageFrom(APT::CacheSetHelper::PATTERN, &UpgradablePackages, Cache, "?upgradable");
+      }
+
+      if (Fix != NULL && _config->FindB("APT::Get::AutoSolving", true) == true)
+      {
+	 InstallAction.propagateReleaseCandidateSwitching(helper.selectedByRelease, c0out);
+	 InstallAction.doAutoInstall();
+      }
+
+      if (_error->PendingError() == true)
+      {
+	 return false;
+      }
+
+      /* If we are in the Broken fixing mode we do not attempt to fix the
+	 problems. This is if the user invoked install without -f and gave
+	 packages */
+      if (BrokenFix == true && Cache->BrokenCount() != 0)
+      {
+	 c1out << _("You might want to run 'apt --fix-broken install' to correct these.") << std::endl;
+	 ShowBroken(c1out,Cache,false);
+	 return _error->Error(_("Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution)."));
+      }
+
+      if (Fix != NULL)
+      {
+	 // Call the scored problem resolver
+	 OpTextProgress Progress(*_config);
+	 bool const distUpgradeMode = strcmp(CmdL.FileList[0], "dist-upgrade") == 0 || strcmp(CmdL.FileList[0], "full-upgrade") == 0;
+
+	 if (distUpgradeMode && _config->Find("Binary") == "apt")
+	    _config->CndSet("APT::Get::AutomaticRemove::Kernels", _config->FindB("APT::Get::AutomaticRemove", true));
+
+	 bool resolver_fail = false;
+	 if (distUpgradeMode == true || UpgradeMode != APT::Upgrade::ALLOW_EVERYTHING)
+	    resolver_fail = APT::Upgrade::Upgrade(Cache, UpgradeMode, &Progress);
+	 else
+	    resolver_fail = Fix->Resolve(true, &Progress);
+
+	 if (resolver_fail == false && Cache->BrokenCount() == 0)
+	    return false;
+      }
+
+      if (CheckNothingBroken(Cache) == false)
+	 return false;
+   }
+   if (!DoAutomaticRemove(Cache)) 
+      return false;
+
+   // if nothing changed in the cache, but only the automark information
+   // we write the StateFile here, otherwise it will be written in 
+   // cache.commit()
+   if (InstallAction.AutoMarkChanged > 0 &&
+       Cache->DelCount() == 0 && Cache->InstCount() == 0 &&
+       Cache->BadCount() == 0 &&
+       _config->FindB("APT::Get::Simulate",false) == false)
+      Cache->writeStateFile(NULL);
+
+   SortedPackageUniverse Universe(Cache);
+   for (auto const &Pkg: Universe)
+      if (Pkg->CurrentVer != 0 && not Cache[Pkg].Upgrade() && not Cache[Pkg].Delete() &&
+	  UpgradablePackages.find(Pkg) != UpgradablePackages.end())
+	 HeldBackPackages.push_back(Pkg);
+
+   return true;
+}
+									/*}}}*/
+bool AddVolatileSourceFile(pkgSourceList *const SL, PseudoPkg &&pkg, std::vector<PseudoPkg> &VolatileCmdL)/*{{{*/
+{
+   auto const ext = flExtension(pkg.name);
+   if (ext != "dsc" && FileExists(pkg.name + "/debian/control") == false)
+      return false;
+   std::vector<std::string> files;
+   SL->AddVolatileFile(pkg.name, &files);
+   std::transform(files.begin(), files.end(), std::back_inserter(VolatileCmdL), [&](auto &&f) { return PseudoPkg{std::move(f), pkg.arch, pkg.release, pkg.index}; });
+   return true;
+
+}
+									/*}}}*/
+bool AddVolatileBinaryFile(pkgSourceList *const SL, PseudoPkg &&pkg, std::vector<PseudoPkg> &VolatileCmdL)/*{{{*/
+{
+   auto const ext = flExtension(pkg.name);
+   if (ext != "deb" && ext != "ddeb" && ext != "changes")
+      return false;
+   std::vector<std::string> files;
+   SL->AddVolatileFile(pkg.name, &files);
+   std::transform(files.begin(), files.end(), std::back_inserter(VolatileCmdL), [&](auto &&f) { return PseudoPkg{std::move(f), pkg.arch, pkg.release, pkg.index}; });
+   return true;
+}
+									/*}}}*/
+static bool AddIfVolatile(pkgSourceList *const SL, std::vector<PseudoPkg> &VolatileCmdL, bool (*Add)(pkgSourceList *const, PseudoPkg &&, std::vector<PseudoPkg> &), char const * const I, std::string const &pseudoArch)/*{{{*/
+{
+   if (I != nullptr && (I[0] == '/' || (I[0] == '.' && (I[1] == '\0' || (I[1] == '.' && (I[2] == '\0' || I[2] == '/')) || I[1] == '/'))))
+   {
+      PseudoPkg pkg(I, pseudoArch, "", SL->GetVolatileFiles().size());
+      if (FileExists(I)) // this accepts directories and symlinks, too
+      {
+	 if (Add(SL, std::move(pkg), VolatileCmdL))
+	    ;
+	 else
+	    _error->Error(_("Unsupported file %s given on commandline"), I);
+	 return true;
+      }
+      else
+      {
+	 auto const found = pkg.name.rfind("/");
+	 if (found == pkg.name.find("/"))
+	    _error->Error(_("Unsupported file %s given on commandline"), I);
+	 else
+	 {
+	    pkg.release = pkg.name.substr(found + 1);
+	    pkg.name.erase(found);
+	    if (Add(SL, std::move(pkg), VolatileCmdL))
+	       ;
+	    else
+	       _error->Error(_("Unsupported file %s given on commandline"), I);
+	 }
+	 return true;
+      }
+   }
+   return false;
+}
+									/*}}}*/
+std::vector<PseudoPkg> GetAllPackagesAsPseudo(pkgSourceList *const SL, CommandLine &CmdL, bool (*Add)(pkgSourceList *const, PseudoPkg &&, std::vector<PseudoPkg> &), std::string const &pseudoArch)/*{{{*/
+{
+   std::vector<PseudoPkg> PkgCmdL;
+   std::for_each(CmdL.FileList + 1, CmdL.FileList + CmdL.FileSize(), [&](char const *const I) {
+      if (AddIfVolatile(SL, PkgCmdL, Add, I, pseudoArch) == false)
+	 PkgCmdL.emplace_back(I, pseudoArch, "", -1);
+   });
+   return PkgCmdL;
+}
+									/*}}}*/
+std::vector<PseudoPkg> GetPseudoPackages(pkgSourceList *const SL, CommandLine &CmdL, bool (*Add)(pkgSourceList *const, PseudoPkg &&, std::vector<PseudoPkg> &), std::string const &pseudoArch)/*{{{*/
+{
+   std::vector<PseudoPkg> VolatileCmdL;
+   std::remove_if(CmdL.FileList + 1, CmdL.FileList + 1 + CmdL.FileSize(), [&](char const *const I) {
+      return AddIfVolatile(SL, VolatileCmdL, Add, I, pseudoArch);
+   });
+   return VolatileCmdL;
+}
+									/*}}}*/
+// DoInstall - Install packages from the command line			/*{{{*/
+// ---------------------------------------------------------------------
+/* Install named packages */
+struct PkgIsExtraInstalled {
+   pkgCacheFile * const Cache;
+   APT::VersionVector const * const verset;
+   PkgIsExtraInstalled(pkgCacheFile * const Cache, APT::VersionVector const * const Container) : Cache(Cache), verset(Container) {}
+   bool operator() (pkgCache::PkgIterator const &Pkg)
+   {
+        if ((*Cache)[Pkg].Install() == false)
+           return false;
+        pkgCache::VerIterator const Cand = (*Cache)[Pkg].CandidateVerIter(*Cache);
+	return std::find(verset->begin(), verset->end(), Cand) == verset->end();
+   }
+};
+bool DoInstall(CommandLine &CmdL)
+{
+   CacheFile Cache;
+
+   if (_config->FindB("APT::Update") && not DoUpdate())
+      return false;
+
+   Cache.InhibitActionGroups(true);
+   if (Cache.BuildSourceList() == false)
+      return false;
+   auto VolatileCmdL = GetPseudoPackages(Cache.GetSourceList(), CmdL, AddVolatileBinaryFile, "");
+
+   // then open the cache
+   if (Cache.OpenForInstall() == false || 
+       Cache.CheckDeps(CmdL.FileSize() != 1) == false)
+      return false;
+
+   std::map<unsigned short, APT::VersionVector> verset;
+   std::set<std::string> UnknownPackages;
+   APT::PackageVector HeldBackPackages;
+
+   if (not DoCacheManipulationFromCommandLine(CmdL, VolatileCmdL, Cache, verset, 0, UnknownPackages, HeldBackPackages))
+   {
+      RunJsonHook("AptCli::Hooks::Install", "org.debian.apt.hooks.install.fail", CmdL.FileList, Cache, UnknownPackages);
+      return false;
+   }
+
+   /* Print out a list of packages that are going to be installed extra
+      to what the user asked */
+   SortedPackageUniverse Universe(Cache);
+   if (Cache->InstCount() != verset[MOD_INSTALL].size())
+      ShowList(c1out, _("The following additional packages will be installed:"), Universe,
+	    PkgIsExtraInstalled(&Cache, &verset[MOD_INSTALL]),
+	    &PrettyFullName, CandidateVersion(&Cache));
+
+   /* Print out a list of suggested and recommended packages */
+   {
+      std::list<std::string> Recommends, Suggests, SingleRecommends, SingleSuggests;
+      for (auto const &Pkg: Universe)
+      {
+	 /* Just look at the ones we want to install */
+	 if ((*Cache)[Pkg].Install() == false)
+	   continue;
+
+	 // get the recommends/suggests for the candidate ver
+	 pkgCache::VerIterator CV = (*Cache)[Pkg].CandidateVerIter(*Cache);
+	 for (pkgCache::DepIterator D = CV.DependsList(); D.end() == false; )
+	 {
+	    pkgCache::DepIterator Start;
+	    pkgCache::DepIterator End;
+	    D.GlobOr(Start,End); // advances D
+	    if (Start->Type != pkgCache::Dep::Recommends && Start->Type != pkgCache::Dep::Suggests)
+	       continue;
+
+	    {
+	       // Skip if we already saw this
+	       std::string target;
+	       for (pkgCache::DepIterator I = Start; I != D; ++I)
+	       {
+		  if (target.empty() == false)
+		     target.append(" | ");
+		  target.append(I.TargetPkg().FullName(true));
+	       }
+	       std::list<std::string> &Type = Start->Type == pkgCache::Dep::Recommends ? SingleRecommends : SingleSuggests;
+	       if (std::find(Type.begin(), Type.end(), target) != Type.end())
+		  continue;
+	       Type.push_back(target);
+	    }
+
+	    std::list<std::string> OrList;
+	    bool foundInstalledInOrGroup = false;
+	    for (pkgCache::DepIterator I = Start; I != D; ++I)
+	    {
+	       {
+		  // satisfying package is installed and not marked for deletion
+		  APT::VersionList installed = APT::VersionList::FromDependency(Cache, I, APT::CacheSetHelper::INSTALLED);
+		  if (std::find_if(installed.begin(), installed.end(),
+			   [&Cache](pkgCache::VerIterator const &Ver) { return Cache[Ver.ParentPkg()].Delete() == false; }) != installed.end())
+		  {
+		     foundInstalledInOrGroup = true;
+		     break;
+		  }
+	       }
+
+	       {
+		  // satisfying package is upgraded to/new install
+		  APT::VersionList upgrades = APT::VersionList::FromDependency(Cache, I, APT::CacheSetHelper::CANDIDATE);
+		  if (std::find_if(upgrades.begin(), upgrades.end(),
+			   [&Cache](pkgCache::VerIterator const &Ver) { return Cache[Ver.ParentPkg()].Upgrade(); }) != upgrades.end())
+		  {
+		     foundInstalledInOrGroup = true;
+		     break;
+		  }
+	       }
+
+	       if (OrList.empty())
+		  OrList.push_back(I.TargetPkg().FullName(true));
+	       else
+		  OrList.push_back("| " + I.TargetPkg().FullName(true));
+	    }
+
+	    if(foundInstalledInOrGroup == false)
+	    {
+	       std::list<std::string> &Type = Start->Type == pkgCache::Dep::Recommends ? Recommends : Suggests;
+	       std::move(OrList.begin(), OrList.end(), std::back_inserter(Type));
+	    }
+	 }
+      }
+      auto always_true = [](std::string const&) { return true; };
+      auto string_ident = [](std::string const&str) { return str; };
+      auto verbose_show_candidate =
+	 [&Cache](std::string str)
+	 {
+	    if (APT::String::Startswith(str, "| "))
+	       str.erase(0, 2);
+	    pkgCache::PkgIterator const Pkg = Cache->FindPkg(str);
+	    if (Pkg.end() == true)
+	       return "";
+	    return (*Cache)[Pkg].CandVersion;
+	 };
+      ShowList(c1out,_("Suggested packages:"), Suggests,
+	    always_true, string_ident, verbose_show_candidate);
+      ShowList(c1out,_("Recommended packages:"), Recommends,
+	    always_true, string_ident, verbose_show_candidate);
+   }
+
+   RunJsonHook("AptCli::Hooks::Install", "org.debian.apt.hooks.install.pre-prompt", CmdL.FileList, Cache);
+
+   bool result;
+   // See if we need to prompt
+   // FIXME: check if really the packages in the set are going to be installed
+   if (Cache->InstCount() == verset[MOD_INSTALL].size() && Cache->DelCount() == 0)
+      result = InstallPackages(Cache, HeldBackPackages, false, false, true, "AptCli::Hooks::Install", CmdL);
+   else
+      result = InstallPackages(Cache, HeldBackPackages, false, true, true, "AptCli::Hooks::Install", CmdL);
+
+   if (result)
+      result = RunJsonHook("AptCli::Hooks::Install", "org.debian.apt.hooks.install.post", CmdL.FileList, Cache);
+   else
+      /* not a result */ RunJsonHook("AptCli::Hooks::Install", "org.debian.apt.hooks.install.fail", CmdL.FileList, Cache);
+
+   return result;
+}
+									/*}}}*/
+
+// TryToInstall - Mark a package for installation			/*{{{*/
+void TryToInstall::operator() (pkgCache::VerIterator const &Ver) {
+   if (unlikely(Ver.end()))
+   {
+      _error->Fatal("The given version to TryToInstall is invalid!");
+      return;
+   }
+   pkgCache::PkgIterator Pkg = Ver.ParentPkg();
+   if (unlikely(Pkg.end()))
+   {
+      _error->Fatal("The given version to TryToInstall has an invalid parent package!");
+      return;
+   }
+
+   Cache->GetDepCache()->SetCandidateVersion(Ver);
+   pkgDepCache::StateCache &State = (*Cache)[Pkg];
+
+   // Handle the no-upgrade case
+   if (_config->FindB("APT::Get::upgrade",true) == false && Pkg->CurrentVer != 0)
+      ioprintf(c1out,_("Skipping %s, it is already installed and upgrade is not set.\n"),
+	    Pkg.FullName(true).c_str());
+   // Ignore request for install if package would be new
+   else if (_config->FindB("APT::Get::Only-Upgrade", false) == true && Pkg->CurrentVer == 0)
+      ioprintf(c1out,_("Skipping %s, it is not installed and only upgrades are requested.\n"),
+	    Pkg.FullName(true).c_str());
+   else {
+      if (Fix != NULL) {
+	 Fix->Clear(Pkg);
+	 Fix->Protect(Pkg);
+      }
+      Cache->GetDepCache()->MarkInstall(Pkg,false);
+
+      if (State.Install() == false) {
+	 if (_config->FindB("APT::Get::ReInstall",false) == true) {
+	    if (Pkg->CurrentVer == 0 || Pkg.CurrentVer().Downloadable() == false)
+	       ioprintf(c1out,_("Reinstallation of %s is not possible, it cannot be downloaded.\n"),
+		     Pkg.FullName(true).c_str());
+	    else
+	       Cache->GetDepCache()->SetReInstall(Pkg, true);
+	 } else
+	    // TRANSLATORS: First string is package name, second is version
+	    ioprintf(c1out,_("%s is already the newest version (%s).\n"),
+		  Pkg.FullName(true).c_str(), Pkg.CurrentVer().VerStr());
+      }
+
+      // Install it with autoinstalling enabled (if we not respect the minial
+      // required deps or the policy)
+      if (FixBroken == false)
+	 doAutoInstallLater.insert(Pkg);
+   }
+
+   // see if we need to fix the auto-mark flag
+   // e.g. apt-get install foo
+   // where foo is marked automatic
+   if (State.Install() == false &&
+	 (State.Flags & pkgCache::Flag::Auto) &&
+	 _config->FindB("APT::Get::ReInstall",false) == false &&
+	 _config->FindB("APT::Get::Only-Upgrade",false) == false &&
+	 _config->FindB("APT::Get::Download-Only",false) == false)
+   {
+      ioprintf(c1out,_("%s set to manually installed.\n"),
+	    Pkg.FullName(true).c_str());
+      Cache->GetDepCache()->MarkAuto(Pkg,false);
+      AutoMarkChanged++;
+   }
+}
+									/*}}}*/
+bool TryToInstall::propagateReleaseCandidateSwitching(std::list<std::pair<pkgCache::VerIterator, std::string> > const &start, std::ostream &out)/*{{{*/
+{
+   for (std::list<std::pair<pkgCache::VerIterator, std::string> >::const_iterator s = start.begin();
+	 s != start.end(); ++s)
+      Cache->GetDepCache()->SetCandidateVersion(s->first);
+
+   bool Success = true;
+   // the Changed list contains:
+   //   first: "new version"
+   //   second: "what-caused the change"
+   std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> > Changed;
+   for (std::list<std::pair<pkgCache::VerIterator, std::string> >::const_iterator s = start.begin();
+	 s != start.end(); ++s)
+   {
+      Changed.push_back(std::make_pair(s->first, pkgCache::VerIterator(*Cache)));
+      // We continue here even if it failed to enhance the ShowBroken output
+      Success &= Cache->GetDepCache()->SetCandidateRelease(s->first, s->second, Changed);
+   }
+   for (std::list<std::pair<pkgCache::VerIterator, pkgCache::VerIterator> >::const_iterator c = Changed.begin();
+	 c != Changed.end(); ++c)
+   {
+      if (c->second.end() == true)
+      {
+	 auto const pkgname = c->first.ParentPkg().FullName(true);
+	 if (APT::String::Startswith(pkgname, "builddeps:"))
+	    continue;
+	 ioprintf(out, _("Selected version '%s' (%s) for '%s'\n"),
+	       c->first.VerStr(), c->first.RelStr().c_str(), pkgname.c_str());
+      }
+      else if (c->first.ParentPkg()->Group != c->second.ParentPkg()->Group)
+      {
+	 auto pkgname = c->second.ParentPkg().FullName(true);
+	 if (APT::String::Startswith(pkgname, "builddeps:"))
+	    pkgname.replace(0, strlen("builddeps"), "src");
+	 pkgCache::VerIterator V = (*Cache)[c->first.ParentPkg()].CandidateVerIter(*Cache);
+	 ioprintf(out, _("Selected version '%s' (%s) for '%s' because of '%s'\n"), V.VerStr(),
+	       V.RelStr().c_str(), V.ParentPkg().FullName(true).c_str(), pkgname.c_str());
+      }
+   }
+   return Success;
+}
+									/*}}}*/
+void TryToInstall::doAutoInstall() {					/*{{{*/
+   auto * const DCache = Cache->GetDepCache();
+   for (auto const &P: doAutoInstallLater)
+      DCache->MarkInstall(P, true);
+   doAutoInstallLater.clear();
+}
+									/*}}}*/
+// TryToRemove - Mark a package for removal				/*{{{*/
+void TryToRemove::operator() (pkgCache::VerIterator const &Ver)
+{
+   pkgCache::PkgIterator Pkg = Ver.ParentPkg();
+
+   if (Fix != NULL)
+   {
+      Fix->Clear(Pkg);
+      Fix->Protect(Pkg);
+      Fix->Remove(Pkg);
+   }
+
+   if ((Pkg->CurrentVer == 0 && PurgePkgs == false) ||
+	 (PurgePkgs == true && Pkg->CurrentState == pkgCache::State::NotInstalled))
+   {
+      pkgCache::GrpIterator Grp = Pkg.Group();
+      pkgCache::PkgIterator P = Grp.PackageList();
+      for (; P.end() != true; P = Grp.NextPkg(P))
+      {
+	 if (P == Pkg)
+	    continue;
+	 if (P->CurrentVer != 0 || (PurgePkgs == true && P->CurrentState != pkgCache::State::NotInstalled))
+	 {
+	    // TRANSLATORS: Note, this is not an interactive question
+	    ioprintf(c1out,_("Package '%s' is not installed, so not removed. Did you mean '%s'?\n"),
+		  Pkg.FullName(true).c_str(), P.FullName(true).c_str());
+	    break;
+	 }
+      }
+      if (P.end() == true)
+	 ioprintf(c1out,_("Package '%s' is not installed, so not removed\n"),Pkg.FullName(true).c_str());
+
+      // MarkInstall refuses to install packages on hold
+      Pkg->SelectedState = pkgCache::State::Hold;
+   }
+   else
+      Cache->GetDepCache()->MarkDelete(Pkg, PurgePkgs);
+}
+									/*}}}*/
diff --git a/apt-private/private-install.h b/apt-private/private-install.h
new file mode 100644
index 0000000..0f6d048
--- /dev/null
+++ b/apt-private/private-install.h
@@ -0,0 +1,81 @@
+#ifndef APT_PRIVATE_INSTALL_H
+#define APT_PRIVATE_INSTALL_H
+
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+
+#include <list>
+#include <string>
+#include <utility>
+
+class CacheFile;
+class CommandLine;
+class pkgProblemResolver;
+
+APT_PUBLIC bool DoInstall(CommandLine &Cmd);
+
+struct PseudoPkg
+{
+   std::string name;
+   std::string arch;
+   std::string release;
+   ssize_t index;
+   PseudoPkg(std::string const &n, std::string const &a, std::string const &r) : name(n), arch(a), release(r), index(-1) {}
+   PseudoPkg(std::string const &n, std::string const &a, std::string const &r, ssize_t i) : name(n), arch(a), release(r), index(i) {}
+};
+std::vector<PseudoPkg> GetAllPackagesAsPseudo(pkgSourceList *const SL, CommandLine &CmdL, bool (*Add)(pkgSourceList *const, PseudoPkg &&, std::vector<PseudoPkg> &), std::string const &pseudoArch);
+std::vector<PseudoPkg> GetPseudoPackages(pkgSourceList *const SL, CommandLine &CmdL, bool (*Add)(pkgSourceList *const, PseudoPkg &&, std::vector<PseudoPkg> &), std::string const &pseudoArch);
+bool AddVolatileBinaryFile(pkgSourceList *const SL, PseudoPkg &&pkg, std::vector<PseudoPkg> &VolatileCmdL);
+bool AddVolatileSourceFile(pkgSourceList *const SL, PseudoPkg &&pkg, std::vector<PseudoPkg> &VolatileCmdL);
+
+bool DoCacheManipulationFromCommandLine(CommandLine &CmdL, std::vector<PseudoPkg> &VolatileCmdL, CacheFile &Cache,
+					std::map<unsigned short, APT::VersionVector> &verset, int UpgradeMode,
+					std::set<std::string> &UnknownPackages, APT::PackageVector &HeldBackPackages);
+bool DoCacheManipulationFromCommandLine(CommandLine &CmdL, std::vector<PseudoPkg> &VolatileCmdL, CacheFile &Cache, int UpgradeMode,
+					APT::PackageVector &HeldBackPackages);
+
+APT_PUBLIC bool InstallPackages(CacheFile &Cache,
+				APT::PackageVector &HeldBackPackages,
+				bool ShwKept, bool Ask = true,
+				bool Safety = true,
+				std::string const &Hook = "",
+				CommandLine const &CmdL = {});
+
+bool CheckNothingBroken(CacheFile &Cache);
+bool DoAutomaticRemove(CacheFile &Cache);
+
+// TryToInstall - Mark a package for installation			/*{{{*/
+struct TryToInstall {
+   pkgCacheFile* Cache;
+   pkgProblemResolver* Fix;
+   bool FixBroken;
+   unsigned long AutoMarkChanged;
+   APT::PackageVector doAutoInstallLater;
+
+   TryToInstall(pkgCacheFile &Cache, pkgProblemResolver *PM, bool const FixBroken) : Cache(&Cache), Fix(PM),
+			FixBroken(FixBroken), AutoMarkChanged(0) {};
+
+   void operator() (pkgCache::VerIterator const &Ver);
+   bool propagateReleaseCandidateSwitching(std::list<std::pair<pkgCache::VerIterator, std::string> > const &start, std::ostream &out);
+   void doAutoInstall();
+};
+									/*}}}*/
+// TryToRemove - Mark a package for removal				/*{{{*/
+struct TryToRemove {
+   pkgCacheFile* Cache;
+   pkgProblemResolver* Fix;
+   bool PurgePkgs;
+
+   TryToRemove(pkgCacheFile &Cache, pkgProblemResolver *PM) : Cache(&Cache), Fix(PM),
+				PurgePkgs(_config->FindB("APT::Get::Purge", false)) {};
+
+   void operator() (pkgCache::VerIterator const &Ver);
+};
+									/*}}}*/
+
+
+#endif
diff --git a/apt-private/private-json-hooks.cc b/apt-private/private-json-hooks.cc
new file mode 100644
index 0000000..5818518
--- /dev/null
+++ b/apt-private/private-json-hooks.cc
@@ -0,0 +1,532 @@
+/*
+ * private-json-hooks.cc - 2nd generation, JSON-RPC, hooks for APT
+ *
+ * Copyright (c) 2018 Canonical Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+#include <config.h>
+
+#include <apt-pkg/debsystem.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/strutl.h>
+#include <apt-private/private-json-hooks.h>
+#include <apt-private/private-output.h>
+
+#include <iomanip>
+#include <ostream>
+#include <sstream>
+#include <stack>
+#include <unordered_map>
+
+#include <csignal>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+/**
+ * @brief Simple JSON writer
+ *
+ * This performs no error checking, so be careful.
+ */
+class APT_HIDDEN JsonWriter
+{
+   std::ostream &os;
+   std::locale old_locale;
+
+   enum write_state
+   {
+      empty,
+      in_array_first_element,
+      in_array,
+      in_object_first_key,
+      in_object_key,
+      in_object_val
+   } state = empty;
+
+   std::stack<write_state> old_states;
+
+   void maybeComma()
+   {
+      switch (state)
+      {
+      case empty:
+	 break;
+      case in_object_val:
+	 state = in_object_key;
+	 break;
+      case in_object_key:
+	 state = in_object_val;
+	 os << ',';
+	 break;
+      case in_array:
+	 os << ',';
+	 break;
+      case in_array_first_element:
+	 state = in_array;
+	 break;
+      case in_object_first_key:
+	 state = in_object_val;
+	 break;
+      default:
+	 abort();
+      }
+   }
+
+   void pushState(write_state state)
+   {
+      old_states.push(this->state);
+      this->state = state;
+   }
+
+   void popState()
+   {
+      this->state = old_states.top();
+      old_states.pop();
+   }
+
+   public:
+   explicit JsonWriter(std::ostream &os) : os(os), old_locale{os.imbue(std::locale::classic())} {}
+   ~JsonWriter() { os.imbue(old_locale); }
+   JsonWriter &beginArray()
+   {
+      maybeComma();
+      pushState(in_array_first_element);
+      os << '[';
+      return *this;
+   }
+   JsonWriter &endArray()
+   {
+      popState();
+      os << ']';
+      return *this;
+   }
+   JsonWriter &beginObject()
+   {
+      maybeComma();
+      pushState(in_object_first_key);
+      os << '{';
+      return *this;
+   }
+   JsonWriter &endObject()
+   {
+      popState();
+      os << '}';
+      return *this;
+   }
+   std::ostream &encodeString(std::ostream &out, std::string const &str)
+   {
+      out << '"';
+
+      for (std::string::const_iterator c = str.begin(); c != str.end(); c++)
+      {
+	 if (*c <= 0x1F || *c == '"' || *c == '\\')
+	    ioprintf(out, "\\u%04X", *c);
+	 else
+	    out << *c;
+      }
+
+      out << '"';
+      return out;
+   }
+   JsonWriter &name(std::string const &name)
+   {
+      maybeComma();
+      encodeString(os, name) << ':';
+      return *this;
+   }
+   JsonWriter &value(std::string const &value)
+   {
+      maybeComma();
+      encodeString(os, value);
+      return *this;
+   }
+   JsonWriter &value(const char *value)
+   {
+      maybeComma();
+      if (value == nullptr)
+	 os << "null";
+      else
+	 encodeString(os, value);
+      return *this;
+   }
+   JsonWriter &value(int value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+   JsonWriter &value(long value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+   JsonWriter &value(long long value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+   JsonWriter &value(unsigned long long value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+   JsonWriter &value(unsigned long value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+   JsonWriter &value(unsigned int value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+   JsonWriter &value(bool value)
+   {
+      maybeComma();
+      os << (value ? "true" : "false");
+      return *this;
+   }
+   JsonWriter &value(double value)
+   {
+      maybeComma();
+      os << value;
+      return *this;
+   }
+};
+
+/**
+ * @brief Write a VerFileIterator to a JsonWriter
+ */
+static void verFiletoJson(JsonWriter &writer, CacheFile &, pkgCache::VerFileIterator const &vf)
+{
+   auto pf = vf.File(); // Packages file
+   auto rf = pf.ReleaseFile(); // release file
+
+   writer.beginObject();
+   if (not rf.end()) {
+      if (rf->Archive != 0)
+	 writer.name("archive").value(rf.Archive());
+      if (rf->Codename != 0)
+	 writer.name("codename").value(rf.Codename());
+      if (rf->Version != 0)
+	 writer.name("version").value(rf.Version());
+      if (rf->Origin != 0)
+	 writer.name("origin").value(rf.Origin());
+      if (rf->Label != 0)
+	 writer.name("label").value(rf.Label());
+      if (rf->Site != 0)
+	 writer.name("site").value(rf.Site());
+   }
+
+   writer.endObject();
+}
+
+/**
+ * @brief Write a VerIterator to a JsonWriter
+ */
+static void verIterToJson(JsonWriter &writer, CacheFile &Cache, pkgCache::VerIterator const &Ver)
+{
+   writer.beginObject();
+   writer.name("id").value(Ver->ID);
+   writer.name("version").value(Ver.VerStr());
+   writer.name("architecture").value(Ver.Arch());
+   writer.name("pin").value(Cache->GetPolicy().GetPriority(Ver));
+
+   writer.name("origins");
+   writer.beginArray();
+   for (auto vf = Ver.FileList(); !vf.end(); vf++)
+      if ((vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
+         verFiletoJson(writer, Cache, vf);
+   writer.endArray();
+
+   writer.endObject();
+}
+
+/**
+ * @brief Copy of debSystem::DpkgChrootDirectory()
+ * @todo Remove
+ */
+static void DpkgChrootDirectory()
+{
+   std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory");
+   if (chrootDir == "/")
+      return;
+   std::cerr << "Chrooting into " << chrootDir << std::endl;
+   if (chroot(chrootDir.c_str()) != 0)
+      _exit(100);
+   if (chdir("/") != 0)
+      _exit(100);
+}
+
+/**
+ * @brief Send a notification to the hook's stream
+ */
+static void NotifyHook(std::ostream &os, std::string const &method, const char **FileList, CacheFile &Cache, std::set<std::string> const &UnknownPackages, int hookVersion)
+{
+   SortedPackageUniverse Universe(Cache);
+   JsonWriter jsonWriter{os};
+
+   jsonWriter.beginObject();
+
+   jsonWriter.name("jsonrpc").value("2.0");
+   jsonWriter.name("method").value(method);
+
+   /* Build params */
+   jsonWriter.name("params").beginObject();
+   if (FileList != nullptr)
+   {
+      jsonWriter.name("command").value(FileList[0]);
+      jsonWriter.name("search-terms").beginArray();
+      for (int i = 1; FileList[i] != NULL; i++)
+	 jsonWriter.value(FileList[i]);
+      jsonWriter.endArray();
+   }
+   jsonWriter.name("unknown-packages").beginArray();
+   for (auto const &PkgName : UnknownPackages)
+      jsonWriter.value(PkgName);
+   jsonWriter.endArray();
+
+   jsonWriter.name("packages").beginArray();
+   for (auto const &Pkg : Universe)
+   {
+      switch (Cache[Pkg].Mode)
+      {
+      case pkgDepCache::ModeInstall:
+      case pkgDepCache::ModeDelete:
+	 break;
+      default:
+	 continue;
+      }
+
+      jsonWriter.beginObject();
+
+      jsonWriter.name("id").value(Pkg->ID);
+      jsonWriter.name("name").value(Pkg.Name());
+      jsonWriter.name("architecture").value(Pkg.Arch());
+
+      switch (Cache[Pkg].Mode)
+      {
+      case pkgDepCache::ModeInstall:
+	 if (Pkg->CurrentVer != 0 && Cache[Pkg].Upgrade() && hookVersion >= 0x020)
+	    jsonWriter.name("mode").value("upgrade");
+	 else if (Pkg->CurrentVer != 0 && Cache[Pkg].Downgrade() && hookVersion >= 0x020)
+	    jsonWriter.name("mode").value("downgrade");
+	 else if (Pkg->CurrentVer != 0 && Cache[Pkg].ReInstall() && hookVersion >= 0x020)
+	    jsonWriter.name("mode").value("reinstall");
+	 else
+	    jsonWriter.name("mode").value("install");
+	 break;
+      case pkgDepCache::ModeDelete:
+	 jsonWriter.name("mode").value(Cache[Pkg].Purge() ? "purge" : "deinstall");
+	 break;
+      default:
+	 continue;
+      }
+      jsonWriter.name("automatic").value(bool(Cache[Pkg].Flags & pkgCache::Flag::Auto));
+
+      jsonWriter.name("versions").beginObject();
+
+      if (Cache[Pkg].CandidateVer != nullptr)
+	 verIterToJson(jsonWriter.name("candidate"), Cache, Cache[Pkg].CandidateVerIter(Cache));
+      if (Cache[Pkg].InstallVer != nullptr)
+	 verIterToJson(jsonWriter.name("install"), Cache, Cache[Pkg].InstVerIter(Cache));
+      if (Pkg->CurrentVer != 0)
+	 verIterToJson(jsonWriter.name("current"), Cache, Pkg.CurrentVer());
+
+      jsonWriter.endObject();
+
+      jsonWriter.endObject();
+   }
+
+   jsonWriter.endArray();  // packages
+   jsonWriter.endObject(); // params
+   jsonWriter.endObject(); // main
+}
+
+/// @brief Build the hello handshake message for 0.1 protocol
+static std::string BuildHelloMessage()
+{
+   std::stringstream Hello;
+   JsonWriter(Hello).beginObject().name("jsonrpc").value("2.0").name("method").value("org.debian.apt.hooks.hello").name("id").value(0).name("params").beginObject().name("versions").beginArray().value("0.1").value("0.2").endArray().endObject().endObject();
+
+   return Hello.str();
+}
+
+/// @brief Build the bye notification for 0.1 protocol
+static std::string BuildByeMessage()
+{
+   std::stringstream Bye;
+   JsonWriter(Bye).beginObject().name("jsonrpc").value("2.0").name("method").value("org.debian.apt.hooks.bye").name("params").beginObject().endObject().endObject();
+
+   return Bye.str();
+}
+
+/// @brief Run the Json hook processes in the given option.
+bool RunJsonHook(std::string const &option, std::string const &method, const char **FileList, CacheFile &Cache, std::set<std::string> const &UnknownPackages)
+{
+   std::unordered_map<int, std::string> notifications;
+   std::string HelloData = BuildHelloMessage();
+   std::string ByeData = BuildByeMessage();
+   int hookVersion;
+
+   bool result = true;
+
+   Configuration::Item const *Opts = _config->Tree(option.c_str());
+   if (Opts == 0 || Opts->Child == 0)
+      return true;
+   Opts = Opts->Child;
+
+   // Flush output before calling hooks
+   std::clog.flush();
+   std::cerr.flush();
+   std::cout.flush();
+   c2out.flush();
+   c1out.flush();
+
+   sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN);
+   sighandler_t old_sigint = signal(SIGINT, SIG_IGN);
+   sighandler_t old_sigquit = signal(SIGQUIT, SIG_IGN);
+
+   unsigned int Count = 1;
+   for (; Opts != 0; Opts = Opts->Next, Count++)
+   {
+      if (Opts->Value.empty() == true)
+	 continue;
+
+      if (_config->FindB("Debug::RunScripts", false) == true)
+	 std::clog << "Running external script with list of all .deb file: '"
+		   << Opts->Value << "'" << std::endl;
+
+      // Create the pipes
+      std::set<int> KeepFDs;
+      MergeKeepFdsFromConfiguration(KeepFDs);
+      int Pipes[2];
+      if (socketpair(AF_UNIX, SOCK_STREAM, 0, Pipes) != 0)
+      {
+	 result = _error->Errno("pipe", "Failed to create IPC pipe to subprocess");
+	 break;
+      }
+
+      int InfoFD = 3;
+
+      if (InfoFD != Pipes[0])
+	 SetCloseExec(Pipes[0], true);
+      else
+	 KeepFDs.insert(Pipes[0]);
+
+      SetCloseExec(Pipes[1], true);
+
+      // Purified Fork for running the script
+      pid_t Process = ExecFork(KeepFDs);
+      if (Process == 0)
+      {
+	 // Setup the FDs
+	 dup2(Pipes[0], InfoFD);
+	 SetCloseExec(STDOUT_FILENO, false);
+	 SetCloseExec(STDIN_FILENO, false);
+	 SetCloseExec(STDERR_FILENO, false);
+
+	 std::string hookfd;
+	 strprintf(hookfd, "%d", InfoFD);
+	 setenv("APT_HOOK_SOCKET", hookfd.c_str(), 1);
+
+	 DpkgChrootDirectory();
+	 const char *Args[4];
+	 Args[0] = "/bin/sh";
+	 Args[1] = "-c";
+	 Args[2] = Opts->Value.c_str();
+	 Args[3] = 0;
+	 execv(Args[0], (char **)Args);
+	 _exit(100);
+      }
+      close(Pipes[0]);
+      FILE *F = fdopen(Pipes[1], "w+");
+      if (F == 0)
+      {
+	 result = _error->Errno("fdopen", "Failed to open new FD");
+	 break;
+      }
+
+      fwrite(HelloData.data(), HelloData.size(), 1, F);
+      fwrite("\n\n", 2, 1, F);
+      fflush(F);
+
+      char *line = nullptr;
+      size_t linesize = 0;
+      ssize_t size = getline(&line, &linesize, F);
+
+      if (size < 0)
+      {
+	 if (errno != ECONNRESET && errno != EPIPE)
+	    _error->Error("Could not read response to hello message from hook %s: %s", Opts->Value.c_str(), strerror(errno));
+	 goto out;
+      }
+      else if (strstr(line, "error") != nullptr)
+      {
+	 _error->Error("Hook %s reported an error during hello: %s", Opts->Value.c_str(), line);
+	 goto out;
+      }
+
+      if (strstr(line, "\"0.1\""))
+      {
+	 hookVersion = 0x010;
+      }
+      else if (strstr(line, "\"0.2\""))
+      {
+	 hookVersion = 0x020;
+      }
+      else
+      {
+	 _error->Error("Unknown hook version in handshake from hook %s: %s", Opts->Value.c_str(), line);
+	 goto out;
+      }
+
+      size = getline(&line, &linesize, F);
+      if (size < 0)
+      {
+	 _error->Error("Could not read message separator line after handshake from %s: %s", Opts->Value.c_str(), feof(F) ? "end of file" : strerror(errno));
+	 goto out;
+      }
+      else if (size == 0 || line[0] != '\n')
+      {
+	 _error->Error("Expected empty line after handshake from %s, received %s", Opts->Value.c_str(), line);
+	 goto out;
+      }
+      {
+	 std::string &data = notifications[hookVersion];
+	 if (data.empty())
+	 {
+	    std::stringstream ss;
+	    NotifyHook(ss, method, FileList, Cache, UnknownPackages, hookVersion);
+	    ;
+	    data = ss.str();
+	 }
+	 fwrite(data.data(), data.size(), 1, F);
+	 fwrite("\n\n", 2, 1, F);
+      }
+
+      fwrite(ByeData.data(), ByeData.size(), 1, F);
+      fwrite("\n\n", 2, 1, F);
+   out:
+      fclose(F);
+      // Clean up the sub process
+      if (ExecWait(Process, Opts->Value.c_str()) == false)
+      {
+	 result = _error->Error("Failure running hook %s", Opts->Value.c_str());
+	 break;
+      }
+
+   }
+   signal(SIGINT, old_sigint);
+   signal(SIGPIPE, old_sigpipe);
+   signal(SIGQUIT, old_sigquit);
+
+   return result;
+}
diff --git a/apt-private/private-json-hooks.h b/apt-private/private-json-hooks.h
new file mode 100644
index 0000000..41be295
--- /dev/null
+++ b/apt-private/private-json-hooks.h
@@ -0,0 +1,14 @@
+/*
+ * private-json-hooks.h - 2nd generation, JSON-RPC, hooks for APT
+ *
+ * Copyright (c) 2018 Canonical Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <set>
+#include <string>
+
+#include <apt-private/private-cachefile.h>
+
+bool RunJsonHook(std::string const &option, std::string const &method, const char **FileList, CacheFile &Cache, std::set<std::string> const &UnknownPackages = {});
diff --git a/apt-private/private-list.cc b/apt-private/private-list.cc
new file mode 100644
index 0000000..eee657c
--- /dev/null
+++ b/apt-private/private-list.cc
@@ -0,0 +1,165 @@
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cachefilter.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/progress.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-list.h>
+#include <apt-private/private-output.h>
+
+#include <iostream>
+#include <map>
+#include <sstream>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include <apti18n.h>
+									/*}}}*/
+
+struct PackageSortAlphabetic						/*{{{*/
+{
+   bool operator () (const pkgCache::PkgIterator &p_lhs, 
+                     const pkgCache::PkgIterator &p_rhs)
+    {
+       const std::string &l_name = p_lhs.FullName(true);
+       const std::string &r_name = p_rhs.FullName(true);
+       return (l_name < r_name);
+    }
+};
+
+class PackageNameMatcher : public Matcher
+{
+   static constexpr const char *const isfnmatch_strict = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789+-.:*";
+   pkgCacheFile &cacheFile;
+  public:
+   explicit PackageNameMatcher(pkgCacheFile &cacheFile, const char **patterns)
+   : cacheFile(cacheFile)
+   {
+      for(int i=0; patterns[i] != NULL; ++i)
+      {
+         std::string pattern = patterns[i];
+         APT::CacheFilter::Matcher *cachefilter = NULL;
+         if(_config->FindB("APT::Cmd::Use-Regexp", false) == true)
+            cachefilter = new APT::CacheFilter::PackageNameMatchesRegEx(pattern);
+         else if (pattern.find_first_not_of(isfnmatch_strict) == std::string::npos)
+            cachefilter = new APT::CacheFilter::PackageNameMatchesFnmatch(pattern);
+	 else
+	    cachefilter = APT::CacheFilter::ParsePattern(pattern, &cacheFile).release();
+
+         if (cachefilter == nullptr) {
+            return;
+            filters.clear();
+         }
+         filters.push_back(cachefilter);
+      }
+   }
+   virtual ~PackageNameMatcher()
+   {
+      for(J=filters.begin(); J != filters.end(); ++J)
+         delete *J;
+   }
+   virtual bool operator () (const pkgCache::PkgIterator &P) APT_OVERRIDE
+   {
+      for(J=filters.begin(); J != filters.end(); ++J)
+      {
+         APT::CacheFilter::Matcher *cachefilter = *J;
+         if((*cachefilter)(P)) 
+            return true;
+      }
+      return false;
+   }
+
+private:
+   std::vector<APT::CacheFilter::Matcher*> filters;
+   std::vector<APT::CacheFilter::Matcher*>::const_iterator J;
+   #undef PackageMatcher
+};
+									/*}}}*/
+static void ListAllVersions(pkgCacheFile &CacheFile, pkgRecords &records,/*{{{*/
+                     pkgCache::PkgIterator const &P, std::ostream &outs,
+                     std::string const &format)
+{
+   for (pkgCache::VerIterator Ver = P.VersionList();
+        Ver.end() == false; ++Ver)
+   {
+      ListSingleVersion(CacheFile, records, Ver, outs, format);
+      outs << std::endl;
+   }
+}
+									/*}}}*/
+// list - list package based on criteria        			/*{{{*/
+// ---------------------------------------------------------------------
+bool DoList(CommandLine &Cmd)
+{
+   pkgCacheFile CacheFile;
+   pkgCache * const Cache = CacheFile.GetPkgCache();
+   if (unlikely(Cache == nullptr || CacheFile.GetDepCache() == nullptr))
+      return false;
+   pkgRecords records(CacheFile);
+
+   const char **patterns;
+   const char *all_pattern[] = { "*", NULL};
+
+   if (strv_length(Cmd.FileList + 1) == 0)
+   {
+      patterns = all_pattern;
+   } else {
+      patterns = Cmd.FileList + 1;
+   }
+
+   std::string format = "${color:highlight}${Package}${color:neutral}/${Origin} ${Version} ${Architecture}${ }${apt:Status}";
+   if (_config->FindB("APT::Cmd::List-Include-Summary", false) == true)
+      format += "\n  ${Description}\n";
+
+   PackageNameMatcher matcher(CacheFile, patterns);
+   LocalitySortedVersionSet bag;
+   OpTextProgress progress(*_config);
+   progress.OverallProgress(0,
+                            Cache->Head().PackageCount, 
+                            Cache->Head().PackageCount,
+                            _("Listing"));
+   GetLocalitySortedVersionSet(CacheFile, &bag, matcher, &progress);
+   bool const ShowAllVersions = _config->FindB("APT::Cmd::All-Versions", false);
+   std::map<std::string, std::string> output_map;
+   for (LocalitySortedVersionSet::iterator V = bag.begin(); V != bag.end(); ++V)
+   {
+      std::stringstream outs;
+      if(ShowAllVersions == true)
+         ListAllVersions(CacheFile, records, V.ParentPkg(), outs, format);
+      else
+         ListSingleVersion(CacheFile, records, V, outs, format);
+      output_map.insert(std::make_pair<std::string, std::string>(
+	       V.ParentPkg().FullName(), outs.str()));
+   }
+
+   // FIXME: SORT! and make sorting flexible (alphabetic, by pkg status)
+   // output the sorted map
+   std::map<std::string, std::string>::const_iterator K;
+   for (K = output_map.begin(); K != output_map.end(); ++K)
+      std::cout << (*K).second << std::endl;
+
+   // be nice and tell the user if there is more to see
+   if (bag.size() == 1 && ShowAllVersions == false)
+   {
+      // start with -1 as we already displayed one version
+      int versions = -1;
+      pkgCache::VerIterator Ver = *bag.begin();
+      for ( ; Ver.end() == false; ++Ver)
+         ++versions;
+      if (versions > 0)
+         _error->Notice(P_("There is %i additional version. Please use the '-a' switch to see it", "There are %i additional versions. Please use the '-a' switch to see them.", versions), versions);
+   }
+
+   return true;
+}
+
diff --git a/apt-private/private-list.h b/apt-private/private-list.h
new file mode 100644
index 0000000..aa26777
--- /dev/null
+++ b/apt-private/private-list.h
@@ -0,0 +1,11 @@
+#ifndef APT_PRIVATE_LIST_H
+#define APT_PRIVATE_LIST_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool DoList(CommandLine &Cmd);
+
+
+#endif
diff --git a/apt-private/private-main.cc b/apt-private/private-main.cc
new file mode 100644
index 0000000..a80f03c
--- /dev/null
+++ b/apt-private/private-main.cc
@@ -0,0 +1,90 @@
+#include <config.h>
+
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-main.h>
+
+#include <iostream>
+#include <locale>
+
+#include <csignal>
+#include <cstring>
+#include <unistd.h>
+
+#include <apti18n.h>
+
+void InitLocale(APT_CMD const binary)				/*{{{*/
+{
+   try {
+      std::locale::global(std::locale(""));
+   } catch (...) {
+      setlocale(LC_ALL, "");
+   }
+   switch(binary)
+   {
+      case APT_CMD::APT:
+      case APT_CMD::APT_CACHE:
+      case APT_CMD::APT_CDROM:
+      case APT_CMD::APT_CONFIG:
+      case APT_CMD::APT_DUMP_SOLVER:
+      case APT_CMD::APT_HELPER:
+      case APT_CMD::APT_GET:
+      case APT_CMD::APT_MARK:
+      case APT_CMD::RRED:
+	 textdomain("apt");
+	 break;
+      case APT_CMD::APT_EXTRACTTEMPLATES:
+      case APT_CMD::APT_FTPARCHIVE:
+      case APT_CMD::APT_INTERNAL_PLANNER:
+      case APT_CMD::APT_INTERNAL_SOLVER:
+      case APT_CMD::APT_SORTPKG:
+	 textdomain("apt-utils");
+	 break;
+   }
+}
+									/*}}}*/
+void InitSignals()							/*{{{*/
+{
+   signal(SIGPIPE,SIG_IGN);
+}
+									/*}}}*/
+void CheckIfSimulateMode(CommandLine &CmdL)				/*{{{*/
+{
+   // disable locking in simulation, but show the message only for users
+   // as root hasn't the same problems like unreadable files which can heavily
+   // distort the simulation.
+   if (_config->FindB("APT::Get::Simulate") == true &&
+	(CmdL.FileSize() == 0 ||
+	 (strcmp(CmdL.FileList[0], "source") != 0 && strcmp(CmdL.FileList[0], "download") != 0 &&
+	  strcmp(CmdL.FileList[0], "changelog") != 0)))
+   {
+      if (getuid() != 0 && _config->FindB("APT::Get::Show-User-Simulation-Note",true) == true)
+	 // TRANSLATORS: placeholder is a binary name like apt or apt-get
+	 ioprintf(std::cout, _("NOTE: This is only a simulation!\n"
+	    "      %s needs root privileges for real execution.\n"
+	    "      Keep also in mind that locking is deactivated,\n"
+	    "      so don't depend on the relevance to the real current situation!\n"),
+	    _config->Find("Binary").c_str());
+      _config->Set("Debug::NoLocking",true);
+   }
+}
+									/*}}}*/
+void CheckIfCalledByScript(int argc, const char *argv[])		/*{{{*/
+{
+   if (unlikely(argc < 1)) return;
+
+   if(!isatty(STDOUT_FILENO) &&
+      _config->FindB("Apt::Cmd::Disable-Script-Warning", false) == false)
+   {
+      std::cerr << std::endl
+                << "WARNING: " << flNotDir(argv[0]) << " "
+                << "does not have a stable CLI interface. "
+                << "Use with caution in scripts."
+                << std::endl
+                << std::endl;
+   }
+}
+									/*}}}*/
diff --git a/apt-private/private-main.h b/apt-private/private-main.h
new file mode 100644
index 0000000..4dcb271
--- /dev/null
+++ b/apt-private/private-main.h
@@ -0,0 +1,15 @@
+#ifndef APT_PRIVATE_MAIN_H
+#define APT_PRIVATE_MAIN_H
+
+#include <apt-private/private-cmndline.h>
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+void InitLocale(APT_CMD const binary);
+APT_PUBLIC void InitSignals();
+APT_PUBLIC void CheckIfSimulateMode(CommandLine &CmdL);
+APT_PUBLIC void CheckIfCalledByScript(int argc, const char *argv[]);
+
+#endif
diff --git a/apt-private/private-moo.cc b/apt-private/private-moo.cc
new file mode 100644
index 0000000..2a9ed93
--- /dev/null
+++ b/apt-private/private-moo.cc
@@ -0,0 +1,200 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   Here be cows – but: Never ask, never tell
+
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-moo.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-utils.h>
+
+#include <cstddef>
+#include <cstring>
+#include <ctime>
+#include <iostream>
+#include <sstream>
+#include <string>
+
+#include <apti18n.h>
+									/*}}}*/
+
+static std::string getMooLine(time_t const timenow)			/*{{{*/
+{
+   struct tm special;
+   localtime_r(&timenow, &special);
+   enum { NORMAL, PACKAGEMANAGER, APPRECIATION, AGITATION, AIRBORN } line;
+   if (special.tm_mon == 11 && special.tm_mday == 25)
+      line = PACKAGEMANAGER;
+   else if (special.tm_mon == 7 && special.tm_mday == 16)
+      line = APPRECIATION;
+   else if (special.tm_mon == 10 && special.tm_mday == 7)
+      line = AGITATION;
+   else if (special.tm_mon == 1 && special.tm_mday == 18)
+      line = AIRBORN;
+   else
+      line = NORMAL;
+
+   bool const quiet = _config->FindI("quiet") >= 2;
+   std::ostringstream out;
+   if (quiet == false)
+      out << "...\"";
+
+   switch(line)
+   {
+      case PACKAGEMANAGER: out << "Happy package management day!"; break;
+      case APPRECIATION:   out << "Three moos for Debian!"; break;
+      case AGITATION:      out << "Whoever needs milk, bows to the animal."; break;
+      case AIRBORN:        out << "It's a Bird ... It's a Plane ... It's Super Cow!"; break;
+      default:             out << "Have you mooed today?"; break;
+   }
+
+   if (quiet == true)
+      out << std::endl;
+   else
+      out << "\"..." << std::endl;
+
+   return out.str();
+}
+									/*}}}*/
+static bool printMooLine(time_t const timenow)				/*{{{*/
+{
+   std::cerr << getMooLine(timenow);
+   return true;
+}
+									/*}}}*/
+static bool DoMoo1(time_t const timenow)				/*{{{*/
+{
+   // our trustworthy super cow since 2001
+   if (_config->FindI("quiet") >= 2)
+      return printMooLine(timenow);
+   std::string const moo = getMooLine(timenow);
+   size_t const depth = moo.length()/4;
+   c1out <<
+      OutputInDepth(depth, " ") << "         (__) \n" <<
+      OutputInDepth(depth, " ") << "         (oo) \n" <<
+      OutputInDepth(depth, " ") << "   /------\\/ \n" <<
+      OutputInDepth(depth, " ") << "  / |    ||   \n" <<
+      OutputInDepth(depth, " ") << " *  /\\---/\\ \n" <<
+      OutputInDepth(depth, " ") << "    ~~   ~~   \n" <<
+      moo;
+   return true;
+}
+									/*}}}*/
+static bool DoMoo2(time_t const timenow)				/*{{{*/
+{
+   // by Fernando Ribeiro in lp:56125
+   if (_config->FindI("quiet") >= 2)
+      return printMooLine(timenow);
+   std::string const moo = getMooLine(timenow);
+   size_t const depth = moo.length()/4;
+   if (_config->FindB("APT::Moo::Color", false) == false)
+      c1out <<
+	 OutputInDepth(depth, " ") << "         (__)  \n" <<
+	 OutputInDepth(depth, " ") << " _______~(..)~ \n" <<
+	 OutputInDepth(depth, " ") << "   ,----\\(oo) \n" <<
+	 OutputInDepth(depth, " ") << "  /|____|,'    \n" <<
+	 OutputInDepth(depth, " ") << " * /\"\\ /\\   \n" <<
+	 OutputInDepth(depth, " ") << "   ~ ~ ~ ~     \n" <<
+	 moo;
+   else
+   {
+      c1out <<
+	 OutputInDepth(depth, " ") << "         \033[1;97m(\033[0;33m__\033[1;97m)\033[0m\n" <<
+	 OutputInDepth(depth, " ") << " \033[31m_______\033[33m~(\033[1;34m..\033[0;33m)~\033[0m\n" <<
+	 OutputInDepth(depth, " ") << "   \033[33m,----\033[31m\\\033[33m(\033[1;4;35moo\033[0;33m)\033[0m\n" <<
+	 OutputInDepth(depth, " ") << "  \033[33m/|____|,'\033[0m\n" <<
+	 OutputInDepth(depth, " ") << " \033[1;5;97m*\033[0;33m /\\  /\\\033[0m\n" <<
+	 "\033[32m";
+      for (size_t i = moo.length()/2; i > 1; --i)
+	 c1out << "wW";
+
+      c1out << "w\033[0m\n" << moo;
+   }
+
+   return true;
+}
+									/*}}}*/
+static bool DoMoo3(time_t const timenow)				/*{{{*/
+{
+   // by Robert Millan in deb:134156
+   if (_config->FindI("quiet") >= 2)
+      return printMooLine(timenow);
+   std::string const moo = getMooLine(timenow);
+   size_t const depth = moo.length()/16;
+   c1out <<
+      OutputInDepth(depth, " ") << "                   \\_/ \n" <<
+      OutputInDepth(depth, " ") << " m00h  (__)       -(_)- \n" <<
+      OutputInDepth(depth, " ") << "    \\  ~Oo~___     / \\\n" <<
+      OutputInDepth(depth, " ") << "       (..)  |\\        \n" <<
+      OutputInDepth(depth, "_") << "_________|_|_|__________" <<
+      OutputInDepth((moo.length() - (depth + 27)), "_") << "\n" << moo;
+   return true;
+}
+									/*}}}*/
+static bool DoMooApril()						/*{{{*/
+{
+   // by Christopher Allan Webber and proposed by Paul Tagliamonte
+   // in a "Community outreach": https://lists.debian.org/debian-devel/2013/04/msg00045.html
+   if (_config->FindI("quiet") >= 2)
+   {
+      std::cerr << "Have you smashed some milk today?" << std::endl;
+      return true;
+   }
+   c1out <<
+      "               _     _\n"
+      "              (_\\___( \\,\n"
+      "                )___   _  Have you smashed some milk today?\n"
+      "               /( (_)-(_)    /\n"
+      "    ,---------'         \\_\n"
+      "  //(  ',__,'      \\  (' ')\n"
+      " //  )              '----'\n"
+      " '' ; \\     .--.  ,/\n"
+      "    | )',_,'----( ;\n"
+      "    ||| '''     '||\n";
+   return true;
+}
+									/*}}}*/
+bool DoMoo(CommandLine &CmdL)						/*{{{*/
+{
+   time_t const timenow = GetSecondsSinceEpoch();
+
+   struct tm april;
+   localtime_r(&timenow, &april);
+   if (april.tm_mday == 1 && april.tm_mon == 3)
+      return DoMooApril();
+
+   signed short SuperCow = 1;
+   if (CmdL.FileSize() != 0)
+      for (const char **Moo = CmdL.FileList + 1; *Moo != 0; Moo++)
+         if (strcasecmp(*Moo, "moo") == 0)
+            SuperCow++;
+
+   // time is random enough for our purpose
+   if (SuperCow > 3)
+   {
+      if (april.tm_sec == 1)
+	 SuperCow = 1 + (timenow % 4);
+      else
+	 SuperCow = 1 + (timenow % 3);
+   }
+
+   switch(SuperCow) {
+      case 1: return DoMoo1(timenow);
+      case 2: return DoMoo2(timenow);
+      case 3: return DoMoo3(timenow);
+      case 4: return DoMooApril();
+      default: return DoMoo1(timenow);
+   }
+
+   return true;
+}
+									/*}}}*/
diff --git a/apt-private/private-moo.h b/apt-private/private-moo.h
new file mode 100644
index 0000000..c230ce2
--- /dev/null
+++ b/apt-private/private-moo.h
@@ -0,0 +1,10 @@
+#ifndef APT_PRIVATE_MOO_H
+#define APT_PRIVATE_MOO_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool DoMoo(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-output.cc b/apt-private/private-output.cc
new file mode 100644
index 0000000..93b9424
--- /dev/null
+++ b/apt-private/private-output.cc
@@ -0,0 +1,794 @@
+// Include files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/policy.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-output.h>
+
+#include <csignal>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <iomanip>
+#include <iostream>
+#include <langinfo.h>
+#include <regex.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#include <sstream>
+
+#include <apti18n.h>
+									/*}}}*/
+
+using namespace std;
+
+std::ostream c0out(0);
+std::ostream c1out(0);
+std::ostream c2out(0);
+std::ofstream devnull("/dev/null");
+
+
+unsigned int ScreenWidth = 80 - 1; /* - 1 for the cursor */
+
+// SigWinch - Window size change signal handler				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+static void SigWinch(int)
+{
+   // Riped from GNU ls
+#ifdef TIOCGWINSZ
+   struct winsize ws;
+  
+   if (ioctl(1, TIOCGWINSZ, &ws) != -1 && ws.ws_col >= 5)
+      ScreenWidth = ws.ws_col - 1;
+#endif
+}
+									/*}}}*/
+bool InitOutput(std::basic_streambuf<char> * const out)			/*{{{*/
+{
+   if (!isatty(STDOUT_FILENO) && _config->FindI("quiet", -1) == -1)
+      _config->Set("quiet","1");
+
+   c0out.rdbuf(out);
+   c1out.rdbuf(out);
+   c2out.rdbuf(out);
+   if (_config->FindI("quiet",0) > 0)
+      c0out.rdbuf(devnull.rdbuf());
+   if (_config->FindI("quiet",0) > 1)
+      c1out.rdbuf(devnull.rdbuf());
+
+   // deal with window size changes
+   auto cols = getenv("COLUMNS");
+   if (cols != nullptr)
+   {
+      char * colends;
+      auto const sw = strtoul(cols, &colends, 10);
+      if (*colends != '\0' || sw == 0)
+      {
+	 _error->Warning("Environment variable COLUMNS was ignored as it has an invalid value: \"%s\"", cols);
+	 cols = nullptr;
+      }
+      else
+	 ScreenWidth = sw;
+   }
+   if (cols == nullptr)
+   {
+      signal(SIGWINCH,SigWinch);
+      SigWinch(0);
+   }
+
+   if (isatty(STDOUT_FILENO) == 0 || not _config->FindB("APT::Color", true) || getenv("NO_COLOR") != nullptr)
+   {
+      _config->Set("APT::Color", false);
+      _config->Set("APT::Color::Highlight", "");
+      _config->Set("APT::Color::Neutral", "");
+   } else {
+      // Colors
+      _config->CndSet("APT::Color::Highlight", "\x1B[32m");
+      _config->CndSet("APT::Color::Neutral", "\x1B[0m");
+      
+      _config->CndSet("APT::Color::Red", "\x1B[31m");
+      _config->CndSet("APT::Color::Green", "\x1B[32m");
+      _config->CndSet("APT::Color::Yellow", "\x1B[33m");
+      _config->CndSet("APT::Color::Blue", "\x1B[34m");
+      _config->CndSet("APT::Color::Magenta", "\x1B[35m");
+      _config->CndSet("APT::Color::Cyan", "\x1B[36m");
+      _config->CndSet("APT::Color::White", "\x1B[37m");
+   }
+
+   return true;
+}
+									/*}}}*/
+static std::string GetArchiveSuite(pkgCacheFile &/*CacheFile*/, pkgCache::VerIterator ver) /*{{{*/
+{
+   std::string suite = "";
+   if (ver && ver.FileList())
+   {
+      pkgCache::VerFileIterator VF = ver.FileList();
+      for (; VF.end() == false ; ++VF)
+      {
+         if(VF.File() == NULL || VF.File().Archive() == NULL)
+            suite = suite + "," + _("unknown");
+         else
+            suite = suite + "," + VF.File().Archive();
+         //suite = VF.File().Archive();
+      }
+      suite = suite.erase(0, 1);
+   }
+   return suite;
+}
+									/*}}}*/
+static std::string GetFlagsStr(pkgCacheFile &CacheFile, pkgCache::PkgIterator P)/*{{{*/
+{
+   pkgDepCache *DepCache = CacheFile.GetDepCache();
+   pkgDepCache::StateCache &state = (*DepCache)[P];
+
+   std::string flags_str;
+   if (state.NowBroken())
+      flags_str = "B";
+   if (P.CurrentVer() && state.Upgradable() && state.CandidateVer != NULL)
+      flags_str = "g";
+   else if (P.CurrentVer() != NULL)
+      flags_str = "i";
+   else
+      flags_str = "-";
+   return flags_str;
+}
+									/*}}}*/
+static std::string GetCandidateVersion(pkgCacheFile &CacheFile, pkgCache::PkgIterator P)/*{{{*/
+{
+   pkgPolicy *policy = CacheFile.GetPolicy();
+   pkgCache::VerIterator cand = policy->GetCandidateVer(P);
+
+   return cand ? cand.VerStr() : "(none)";
+}
+									/*}}}*/
+static std::string GetInstalledVersion(pkgCacheFile &/*CacheFile*/, pkgCache::PkgIterator P)/*{{{*/
+{
+   pkgCache::VerIterator inst = P.CurrentVer();
+
+   return inst ? inst.VerStr() : "(none)";
+}
+									/*}}}*/
+static std::string GetVersion(pkgCacheFile &/*CacheFile*/, pkgCache::VerIterator V)/*{{{*/
+{
+   pkgCache::PkgIterator P = V.ParentPkg();
+   if (V == P.CurrentVer())
+   {
+      std::string inst_str = DeNull(V.VerStr());
+#if 0 // FIXME: do we want this or something like this?
+      pkgDepCache *DepCache = CacheFile.GetDepCache();
+      pkgDepCache::StateCache &state = (*DepCache)[P];
+      if (state.Upgradable())
+         return "**"+inst_str;
+#endif
+      return inst_str;
+   }
+
+   if(V)
+      return DeNull(V.VerStr());
+   return "(none)";
+}
+									/*}}}*/
+static std::string GetArchitecture(pkgCacheFile &CacheFile, pkgCache::PkgIterator P)/*{{{*/
+{
+   if (P->CurrentVer == 0)
+   {
+      pkgDepCache * const DepCache = CacheFile.GetDepCache();
+      pkgDepCache::StateCache const &state = (*DepCache)[P];
+      if (state.CandidateVer != NULL)
+      {
+	 pkgCache::VerIterator const CandV(CacheFile, state.CandidateVer);
+	 return CandV.Arch();
+      }
+      else
+      {
+	 pkgCache::VerIterator const V = P.VersionList();
+	 if (V.end() == false)
+	    return V.Arch();
+	 else
+	    return P.Arch();
+      }
+   }
+   else
+      return P.CurrentVer().Arch();
+}
+									/*}}}*/
+static std::string GetShortDescription(pkgCacheFile &CacheFile, pkgRecords &records, pkgCache::PkgIterator P)/*{{{*/
+{
+   pkgPolicy *policy = CacheFile.GetPolicy();
+
+   pkgCache::VerIterator ver;
+   if (P.CurrentVer())
+      ver = P.CurrentVer();
+   else
+      ver = policy->GetCandidateVer(P);
+
+   std::string ShortDescription = "(none)";
+   if(ver)
+   {
+      pkgCache::DescIterator const Desc = ver.TranslatedDescription();
+      if (Desc.end() == false)
+      {
+	 pkgRecords::Parser & parser = records.Lookup(Desc.FileList());
+	 ShortDescription = parser.ShortDesc();
+      }
+   }
+   return ShortDescription;
+}
+									/*}}}*/
+static std::string GetLongDescription(pkgCacheFile &CacheFile, pkgRecords &records, pkgCache::PkgIterator P)/*{{{*/
+{
+   pkgPolicy *policy = CacheFile.GetPolicy();
+
+   pkgCache::VerIterator ver;
+   if (P->CurrentVer != 0)
+      ver = P.CurrentVer();
+   else
+      ver = policy->GetCandidateVer(P);
+
+   std::string const EmptyDescription = "(none)";
+   if(ver.end() == true)
+      return EmptyDescription;
+
+   pkgCache::DescIterator const Desc = ver.TranslatedDescription();
+   if (Desc.end() == false)
+   {
+      pkgRecords::Parser & parser = records.Lookup(Desc.FileList());
+      std::string const longdesc = parser.LongDesc();
+      if (longdesc.empty() == false)
+	 return SubstVar(longdesc, "\n ", "\n  ");
+   }
+   return EmptyDescription;
+}
+									/*}}}*/
+void ListSingleVersion(pkgCacheFile &CacheFile, pkgRecords &records,	/*{{{*/
+                       pkgCache::VerIterator const &V, std::ostream &out,
+                       std::string const &format)
+{
+   pkgCache::PkgIterator const P = V.ParentPkg();
+   pkgDepCache * const DepCache = CacheFile.GetDepCache();
+   pkgDepCache::StateCache const &state = (*DepCache)[P];
+
+   std::string output;
+   if (_config->FindB("APT::Cmd::use-format", false))
+      output = _config->Find("APT::Cmd::format", "${db::Status-Abbrev} ${Package} ${Version} ${Origin} ${Description}");
+   else
+      output = format;
+
+   // FIXME: some of these names are really icky – and all is nowhere documented
+   output = SubstVar(output, "${db::Status-Abbrev}", GetFlagsStr(CacheFile, P));
+   output = SubstVar(output, "${Package}", P.Name());
+   std::string const ArchStr = GetArchitecture(CacheFile, P);
+   output = SubstVar(output, "${Architecture}", ArchStr);
+   std::string const InstalledVerStr = GetInstalledVersion(CacheFile, P);
+   output = SubstVar(output, "${installed:Version}", InstalledVerStr);
+   std::string const CandidateVerStr = GetCandidateVersion(CacheFile, P);
+   output = SubstVar(output, "${candidate:Version}", CandidateVerStr);
+   std::string const VersionStr = GetVersion(CacheFile, V);
+   output = SubstVar(output, "${Version}", VersionStr);
+   output = SubstVar(output, "${Origin}", GetArchiveSuite(CacheFile, V));
+
+   std::string StatusStr = "";
+   if (P->CurrentVer != 0)
+   {
+      if (P.CurrentVer() == V)
+      {
+	 if (state.Upgradable() && state.CandidateVer != NULL)
+	    strprintf(StatusStr, _("[installed,upgradable to: %s]"),
+		  CandidateVerStr.c_str());
+	 else if (V.Downloadable() == false)
+	    StatusStr = _("[installed,local]");
+	 else if(V.Automatic() == true && state.Garbage == true)
+	    StatusStr = _("[installed,auto-removable]");
+	 else if ((state.Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto)
+	    StatusStr = _("[installed,automatic]");
+	 else
+	    StatusStr = _("[installed]");
+      }
+      else if (state.CandidateVer == V && state.Upgradable())
+	 strprintf(StatusStr, _("[upgradable from: %s]"),
+	       InstalledVerStr.c_str());
+   }
+   else if (V.ParentPkg()->CurrentState == pkgCache::State::ConfigFiles)
+      StatusStr = _("[residual-config]");
+   output = SubstVar(output, "${apt:Status}", StatusStr);
+   output = SubstVar(output, "${color:highlight}", _config->Find("APT::Color::Highlight", ""));
+   output = SubstVar(output, "${color:neutral}", _config->Find("APT::Color::Neutral", ""));
+   output = SubstVar(output, "${Description}", GetShortDescription(CacheFile, records, P));
+   if (output.find("${LongDescription}") != string::npos)
+      output = SubstVar(output, "${LongDescription}", GetLongDescription(CacheFile, records, P));
+   output = SubstVar(output, "${ }${ }", "${ }");
+   output = SubstVar(output, "${ }\n", "\n");
+   output = SubstVar(output, "${ }", " ");
+   if (APT::String::Endswith(output, " ") == true)
+      output.erase(output.length() - 1);
+
+   out << output;
+}
+									/*}}}*/
+// ShowBroken - Debugging aide						/*{{{*/
+// ---------------------------------------------------------------------
+/* This prints out the names of all the packages that are broken along
+   with the name of each broken dependency and a quite version
+   description.
+
+   The output looks like:
+ The following packages have unmet dependencies:
+     exim: Depends: libc6 (>= 2.1.94) but 2.1.3-10 is to be installed
+           Depends: libldap2 (>= 2.0.2-2) but it is not going to be installed
+           Depends: libsasl7 but it is not going to be installed
+ */
+static void ShowBrokenPackage(ostream &out, pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg, bool const Now)
+{
+   if (Now == true)
+   {
+      if ((*Cache)[Pkg].NowBroken() == false)
+	 return;
+   }
+   else
+   {
+      if ((*Cache)[Pkg].InstBroken() == false)
+	 return;
+   }
+
+   // Print out each package and the failed dependencies
+   out << " " << Pkg.FullName(true) << " :";
+   unsigned const Indent = Pkg.FullName(true).size() + 3;
+   bool First = true;
+   pkgCache::VerIterator Ver;
+
+   if (Now == true)
+      Ver = Pkg.CurrentVer();
+   else
+      Ver = (*Cache)[Pkg].InstVerIter(*Cache);
+
+   if (Ver.end() == true)
+   {
+      out << endl;
+      return;
+   }
+
+   for (pkgCache::DepIterator D = Ver.DependsList(); D.end() == false;)
+   {
+      // Compute a single dependency element (glob or)
+      pkgCache::DepIterator Start;
+      pkgCache::DepIterator End;
+      D.GlobOr(Start,End); // advances D
+
+      if ((*Cache)->IsImportantDep(End) == false)
+	 continue;
+
+      if (Now == true)
+      {
+	 if (((*Cache)[End] & pkgDepCache::DepGNow) == pkgDepCache::DepGNow)
+	    continue;
+      }
+      else
+      {
+	 if (((*Cache)[End] & pkgDepCache::DepGInstall) == pkgDepCache::DepGInstall)
+	    continue;
+      }
+
+      bool FirstOr = true;
+      while (1)
+      {
+	 if (First == false)
+	    for (unsigned J = 0; J != Indent; J++)
+	       out << ' ';
+	 First = false;
+
+	 if (FirstOr == false)
+	 {
+	    for (unsigned J = 0; J != strlen(End.DepType()) + 3; J++)
+	       out << ' ';
+	 }
+	 else
+	    out << ' ' << End.DepType() << ": ";
+	 FirstOr = false;
+
+	 out << Start.TargetPkg().FullName(true);
+
+	 // Show a quick summary of the version requirements
+	 if (Start.TargetVer() != 0)
+	    out << " (" << Start.CompType() << " " << Start.TargetVer() << ")";
+
+	 /* Show a summary of the target package if possible. In the case
+	    of virtual packages we show nothing */
+	 pkgCache::PkgIterator Targ = Start.TargetPkg();
+	 if (Targ->ProvidesList == 0)
+	 {
+	    out << ' ';
+	    pkgCache::VerIterator Ver = (*Cache)[Targ].InstVerIter(*Cache);
+	    if (Now == true)
+	       Ver = Targ.CurrentVer();
+
+	    if (Ver.end() == false)
+	    {
+	       if (Now == true)
+		  ioprintf(out,_("but %s is installed"),Ver.VerStr());
+	       else
+		  ioprintf(out,_("but %s is to be installed"),Ver.VerStr());
+	    }
+	    else
+	    {
+	       if ((*Cache)[Targ].CandidateVerIter(*Cache).end() == true)
+	       {
+		  if (Targ->ProvidesList == 0)
+		     out << _("but it is not installable");
+		  else
+		     out << _("but it is a virtual package");
+	       }
+	       else
+		  out << (Now?_("but it is not installed"):_("but it is not going to be installed"));
+	    }
+	 }
+
+	 if (Start != End)
+	    out << _(" or");
+	 out << endl;
+
+	 if (Start == End)
+	    break;
+	 ++Start;
+      }
+   }
+}
+void ShowBroken(ostream &out, CacheFile &Cache, bool const Now)
+{
+   if (Cache->BrokenCount() == 0)
+      return;
+
+   out << _("The following packages have unmet dependencies:") << endl;
+   SortedPackageUniverse Universe(Cache);
+   for (auto const &Pkg: Universe)
+      ShowBrokenPackage(out, &Cache, Pkg, Now);
+}
+void ShowBroken(ostream &out, pkgCacheFile &Cache, bool const Now)
+{
+   if (Cache->BrokenCount() == 0)
+      return;
+
+   out << _("The following packages have unmet dependencies:") << endl;
+   APT::PackageUniverse Universe(Cache);
+   for (auto const &Pkg: Universe)
+      ShowBrokenPackage(out, &Cache, Pkg, Now);
+}
+									/*}}}*/
+// ShowNew - Show packages to newly install				/*{{{*/
+void ShowNew(ostream &out,CacheFile &Cache)
+{
+   SortedPackageUniverse Universe(Cache);
+   ShowList(out,_("The following NEW packages will be installed:"), Universe,
+	 [&Cache](pkgCache::PkgIterator const &Pkg) { return Cache[Pkg].NewInstall(); },
+	 &PrettyFullName,
+	 CandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowDel - Show packages to delete					/*{{{*/
+void ShowDel(ostream &out,CacheFile &Cache)
+{
+   SortedPackageUniverse Universe(Cache);
+   ShowList(out,_("The following packages will be REMOVED:"), Universe,
+	 [&Cache](pkgCache::PkgIterator const &Pkg) { return Cache[Pkg].Delete(); },
+	 [&Cache](pkgCache::PkgIterator const &Pkg)
+	 {
+	    std::string str = PrettyFullName(Pkg);
+	    if (((*Cache)[Pkg].iFlags & pkgDepCache::Purge) == pkgDepCache::Purge)
+	       str.append("*");
+	    return str;
+	 },
+	 CandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowPhasing - Show packages kept due to phasing			/*{{{*/
+void ShowPhasing(ostream &out, CacheFile &Cache, APT::PackageVector const &HeldBackPackages)
+{
+   SortedPackageUniverse Universe(Cache);
+   ShowList(out, _("The following upgrades have been deferred due to phasing:"), HeldBackPackages,
+	    &AlwaysTrue,
+	    &PrettyFullName,
+	    CurrentToCandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowKept - Show kept packages					/*{{{*/
+void ShowKept(ostream &out,CacheFile &Cache, APT::PackageVector const &HeldBackPackages)
+{
+   SortedPackageUniverse Universe(Cache);
+   ShowList(out,_("The following packages have been kept back:"), HeldBackPackages,
+	 &AlwaysTrue,
+	 &PrettyFullName,
+	 CurrentToCandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowUpgraded - Show upgraded packages				/*{{{*/
+void ShowUpgraded(ostream &out,CacheFile &Cache)
+{
+   SortedPackageUniverse Universe(Cache);
+   ShowList(out,_("The following packages will be upgraded:"), Universe,
+	 [&Cache](pkgCache::PkgIterator const &Pkg)
+	 {
+	    return Cache[Pkg].Upgrade() == true && Cache[Pkg].NewInstall() == false;
+	 },
+	 &PrettyFullName,
+	 CurrentToCandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowDowngraded - Show downgraded packages				/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ShowDowngraded(ostream &out,CacheFile &Cache)
+{
+   SortedPackageUniverse Universe(Cache);
+   return ShowList(out,_("The following packages will be DOWNGRADED:"), Universe,
+	 [&Cache](pkgCache::PkgIterator const &Pkg)
+	 {
+	    return Cache[Pkg].Downgrade() == true && Cache[Pkg].NewInstall() == false;
+	 },
+	 &PrettyFullName,
+	 CurrentToCandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowHold - Show held but changed packages				/*{{{*/
+bool ShowHold(ostream &out,CacheFile &Cache)
+{
+   SortedPackageUniverse Universe(Cache);
+   return ShowList(out,_("The following held packages will be changed:"), Universe,
+	 [&Cache](pkgCache::PkgIterator const &Pkg)
+	 {
+	    return Pkg->SelectedState == pkgCache::State::Hold &&
+		   Cache[Pkg].InstallVer != (pkgCache::Version *)Pkg.CurrentVer();
+	 },
+	 &PrettyFullName,
+	 CurrentToCandidateVersion(&Cache));
+}
+									/*}}}*/
+// ShowEssential - Show an essential package warning			/*{{{*/
+// ---------------------------------------------------------------------
+/* This prints out a warning message that is not to be ignored. It shows
+   all essential packages and their dependents that are to be removed.
+   It is insanely risky to remove the dependents of an essential package! */
+struct APT_HIDDEN PrettyFullNameWithDue {
+   std::map<unsigned long long, pkgCache::PkgIterator> due;
+   PrettyFullNameWithDue() {}
+   std::string operator() (pkgCache::PkgIterator const &Pkg)
+   {
+      std::string const A = PrettyFullName(Pkg);
+      std::map<unsigned long long, pkgCache::PkgIterator>::const_iterator d = due.find(Pkg->ID);
+      if (d == due.end())
+        return A;
+
+      std::string const B = PrettyFullName(d->second);
+      std::ostringstream outstr;
+      ioprintf(outstr, _("%s (due to %s)"), A.c_str(), B.c_str());
+      return outstr.str();
+   }
+};
+bool ShowEssential(ostream &out,CacheFile &Cache)
+{
+   std::vector<bool> Added(Cache->Head().PackageCount, false);
+   APT::PackageDeque pkglist;
+   PrettyFullNameWithDue withdue;
+
+   SortedPackageUniverse Universe(Cache);
+   for (pkgCache::PkgIterator const &I: Universe)
+   {
+      if ((I->Flags & pkgCache::Flag::Essential) != pkgCache::Flag::Essential &&
+	  (I->Flags & pkgCache::Flag::Important) != pkgCache::Flag::Important)
+	 continue;
+
+      // The essential package is being removed
+      if (Cache[I].Delete() == false)
+	 continue;
+
+      if (Added[I->ID] == false)
+      {
+	 Added[I->ID] = true;
+	 pkglist.insert(I);
+      }
+
+      if (I->CurrentVer == 0)
+	 continue;
+
+      // Print out any essential package depenendents that are to be removed
+      for (pkgCache::DepIterator D = I.CurrentVer().DependsList(); D.end() == false; ++D)
+      {
+	 // Skip everything but depends
+	 if (D->Type != pkgCache::Dep::PreDepends &&
+	     D->Type != pkgCache::Dep::Depends)
+	    continue;
+
+	 pkgCache::PkgIterator P = D.SmartTargetPkg();
+	 if (Cache[P].Delete() == true)
+	 {
+	    if (Added[P->ID] == true)
+	       continue;
+	    Added[P->ID] = true;
+
+	    pkglist.insert(P);
+	    withdue.due[P->ID] = I;
+	 }
+      }
+   }
+   return ShowList(out,_("WARNING: The following essential packages will be removed.\n"
+			 "This should NOT be done unless you know exactly what you are doing!"),
+	 pkglist, &AlwaysTrue, withdue, &EmptyString);
+}
+									/*}}}*/
+// Stats - Show some statistics						/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Stats(ostream &out, pkgDepCache &Dep, APT::PackageVector const &HeldBackPackages)
+{
+   unsigned long Upgrade = 0;
+   unsigned long Downgrade = 0;
+   unsigned long Install = 0;
+   unsigned long ReInstall = 0;
+   for (pkgCache::PkgIterator I = Dep.PkgBegin(); I.end() == false; ++I)
+   {
+      if (Dep[I].NewInstall() == true)
+	 Install++;
+      else
+      {
+	 if (Dep[I].Upgrade() == true)
+	    Upgrade++;
+	 else
+	    if (Dep[I].Downgrade() == true)
+	       Downgrade++;
+      }
+      
+      if (Dep[I].Delete() == false && (Dep[I].iFlags & pkgDepCache::ReInstall) == pkgDepCache::ReInstall)
+	 ReInstall++;
+   }   
+
+   ioprintf(out,_("%lu upgraded, %lu newly installed, "),
+	    Upgrade,Install);
+   
+   if (ReInstall != 0)
+      ioprintf(out,_("%lu reinstalled, "),ReInstall);
+   if (Downgrade != 0)
+      ioprintf(out,_("%lu downgraded, "),Downgrade);
+
+   ioprintf(out,_("%lu to remove and %lu not upgraded.\n"),
+	    Dep.DelCount(), HeldBackPackages.size());
+   
+   if (Dep.BadCount() != 0)
+      ioprintf(out,_("%lu not fully installed or removed.\n"),
+	       Dep.BadCount());
+}
+									/*}}}*/
+// YnPrompt - Yes No Prompt.						/*{{{*/
+// ---------------------------------------------------------------------
+/* Returns true on a Yes.*/
+bool YnPrompt(char const * const Question, bool const Default, bool const ShowGlobalErrors, std::ostream &c1o, std::ostream &c2o)
+{
+   auto const AssumeYes = _config->FindB("APT::Get::Assume-Yes",false);
+   auto const AssumeNo = _config->FindB("APT::Get::Assume-No",false);
+   // if we ask interactively, show warnings/notices before the question
+   if (ShowGlobalErrors == true && AssumeYes == false && AssumeNo == false)
+   {
+      if (_config->FindI("quiet",0) > 0)
+	 _error->DumpErrors(c2o);
+      else
+	 _error->DumpErrors(c2o, GlobalError::DEBUG);
+   }
+
+   c2o << Question << std::flush;
+
+   /* nl_langinfo does not support LANGUAGE setting, so we unset it here
+      to have the help-message (hopefully) match the expected characters */
+   char * language = getenv("LANGUAGE");
+   if (language != NULL)
+      language = strdup(language);
+   if (language != NULL)
+      unsetenv("LANGUAGE");
+
+   if (Default == true)
+      // TRANSLATOR: Yes/No question help-text: defaulting to Y[es]
+      //             e.g. "Do you want to continue? [Y/n] "
+      //             The user has to answer with an input matching the
+      //             YESEXPR/NOEXPR defined in your l10n.
+      c2o << " " << _("[Y/n]") << " " << std::flush;
+   else
+      // TRANSLATOR: Yes/No question help-text: defaulting to N[o]
+      //             e.g. "Should this file be removed? [y/N] "
+      //             The user has to answer with an input matching the
+      //             YESEXPR/NOEXPR defined in your l10n.
+      c2o << " " << _("[y/N]") << " " << std::flush;
+
+   if (language != NULL)
+   {
+      setenv("LANGUAGE", language, 0);
+      free(language);
+   }
+
+   if (AssumeYes)
+   {
+      // TRANSLATOR: "Yes" answer printed for a yes/no question if --assume-yes is set
+      c1o << _("Y") << std::endl;
+      return true;
+   }
+   else if (AssumeNo)
+   {
+      // TRANSLATOR: "No" answer printed for a yes/no question if --assume-no is set
+      c1o << _("N") << std::endl;
+      return false;
+   }
+
+   char response[1024] = "";
+   std::cin.getline(response, sizeof(response));
+
+   if (!std::cin)
+      return false;
+
+   if (strlen(response) == 0)
+      return Default;
+
+   regex_t Pattern;
+   int Res;
+
+   Res = regcomp(&Pattern, nl_langinfo(YESEXPR),
+                 REG_EXTENDED|REG_ICASE|REG_NOSUB);
+
+   if (Res != 0) {
+      char Error[300];
+      regerror(Res,&Pattern,Error,sizeof(Error));
+      return _error->Error(_("Regex compilation error - %s"),Error);
+   }
+
+   Res = regexec(&Pattern, response, 0, NULL, 0);
+   if (Res == 0)
+      return true;
+   return false;
+}
+bool YnPrompt(char const * const Question, bool const Default)
+{
+   return YnPrompt(Question, Default, true, c1out, c2out);
+}
+									/*}}}*/
+
+std::string PrettyFullName(pkgCache::PkgIterator const &Pkg)
+{
+   return Pkg.FullName(true);
+}
+std::string CandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg)
+{
+   return (*Cache)[Pkg].CandVersion;
+}
+std::function<std::string(pkgCache::PkgIterator const &)> CandidateVersion(pkgCacheFile * const Cache)
+{
+   return std::bind(static_cast<std::string(*)(pkgCacheFile * const, pkgCache::PkgIterator const&)>(&CandidateVersion), Cache, std::placeholders::_1);
+}
+std::string CurrentToCandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg)
+{
+   std::string const CurVer = (*Cache)[Pkg].CurVersion;
+   std::string CandVer = (*Cache)[Pkg].CandVersion;
+   if (CurVer == CandVer)
+   {
+      auto const CandVerIter = Cache->GetPolicy()->GetCandidateVer(Pkg);
+      if (not CandVerIter.end())
+	 CandVer = CandVerIter.VerStr();
+   }
+   return  CurVer + " => " + CandVer;
+}
+std::function<std::string(pkgCache::PkgIterator const &)> CurrentToCandidateVersion(pkgCacheFile * const Cache)
+{
+   return std::bind(static_cast<std::string(*)(pkgCacheFile * const, pkgCache::PkgIterator const&)>(&CurrentToCandidateVersion), Cache, std::placeholders::_1);
+}
+bool AlwaysTrue(pkgCache::PkgIterator const &)
+{
+      return true;
+}
+std::string EmptyString(pkgCache::PkgIterator const &)
+{
+   return std::string();
+}
diff --git a/apt-private/private-output.h b/apt-private/private-output.h
new file mode 100644
index 0000000..c3e73d5
--- /dev/null
+++ b/apt-private/private-output.h
@@ -0,0 +1,117 @@
+#ifndef APT_PRIVATE_OUTPUT_H
+#define APT_PRIVATE_OUTPUT_H
+
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+
+#include <fstream>
+#include <functional>
+#include <iostream>
+#include <string>
+
+// forward declaration
+class pkgCacheFile;
+class CacheFile;
+class pkgDepCache;
+class pkgRecords;
+
+
+APT_PUBLIC extern std::ostream c0out;
+APT_PUBLIC extern std::ostream c1out;
+APT_PUBLIC extern std::ostream c2out;
+APT_PUBLIC extern std::ofstream devnull;
+APT_PUBLIC extern unsigned int ScreenWidth;
+
+APT_PUBLIC bool InitOutput(std::basic_streambuf<char> * const out = std::cout.rdbuf());
+
+void ListSingleVersion(pkgCacheFile &CacheFile, pkgRecords &records,
+                       pkgCache::VerIterator const &V, std::ostream &out,
+                       std::string const &format);
+
+
+// helper to describe global state
+APT_PUBLIC void ShowBroken(std::ostream &out, CacheFile &Cache, bool const Now);
+APT_PUBLIC void ShowBroken(std::ostream &out, pkgCacheFile &Cache, bool const Now);
+
+template<class Container, class PredicateC, class DisplayP, class DisplayV> bool ShowList(std::ostream &out, std::string const &Title,
+      Container const &cont,
+      PredicateC Predicate,
+      DisplayP PkgDisplay,
+      DisplayV VerboseDisplay)
+{
+   size_t const ScreenWidth = (::ScreenWidth > 3) ? ::ScreenWidth - 3 : 0;
+   int ScreenUsed = 0;
+   bool const ShowVersions = _config->FindB("APT::Get::Show-Versions", false);
+   bool printedTitle = false;
+
+   for (auto const &Pkg: cont)
+   {
+      if (Predicate(Pkg) == false)
+	 continue;
+
+      if (printedTitle == false)
+      {
+	 out << Title;
+	 printedTitle = true;
+      }
+
+      if (ShowVersions == true)
+      {
+	 out << std::endl << "   " << PkgDisplay(Pkg);
+	 std::string const verbose = VerboseDisplay(Pkg);
+	 if (verbose.empty() == false)
+	    out << " (" << verbose << ")";
+      }
+      else
+      {
+	 std::string const PkgName = PkgDisplay(Pkg);
+	 if (ScreenUsed == 0 || (ScreenUsed + PkgName.length()) >= ScreenWidth)
+	 {
+	    out << std::endl << "  ";
+	    ScreenUsed = 0;
+	 }
+	 else if (ScreenUsed != 0)
+	 {
+	    out << " ";
+	    ++ScreenUsed;
+	 }
+	 out << PkgName;
+	 ScreenUsed += PkgName.length();
+      }
+   }
+
+   if (printedTitle == true)
+   {
+      out << std::endl;
+      return false;
+   }
+   return true;
+}
+
+void ShowNew(std::ostream &out,CacheFile &Cache);
+void ShowDel(std::ostream &out,CacheFile &Cache);
+void ShowKept(std::ostream &out,CacheFile &Cache, APT::PackageVector const &HeldBackPackages);
+void ShowPhasing(std::ostream &out, CacheFile &Cache, APT::PackageVector const &HeldBackPackages);
+void ShowUpgraded(std::ostream &out,CacheFile &Cache);
+bool ShowDowngraded(std::ostream &out,CacheFile &Cache);
+bool ShowHold(std::ostream &out,CacheFile &Cache);
+
+bool ShowEssential(std::ostream &out,CacheFile &Cache);
+
+void Stats(std::ostream &out, pkgDepCache &Dep, APT::PackageVector const &HeldBackPackages);
+
+// prompting
+APT_PUBLIC bool YnPrompt(char const *const Question, bool Default = true);
+bool YnPrompt(char const * const Question, bool const Default, bool const ShowGlobalErrors, std::ostream &c1o, std::ostream &c2o);
+
+APT_PUBLIC std::string PrettyFullName(pkgCache::PkgIterator const &Pkg);
+std::string CandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg);
+std::function<std::string(pkgCache::PkgIterator const &)> CandidateVersion(pkgCacheFile * const Cache);
+std::string CurrentToCandidateVersion(pkgCacheFile * const Cache, pkgCache::PkgIterator const &Pkg);
+std::function<std::string(pkgCache::PkgIterator const &)> CurrentToCandidateVersion(pkgCacheFile * const Cache);
+std::string EmptyString(pkgCache::PkgIterator const &);
+bool AlwaysTrue(pkgCache::PkgIterator const &);
+
+#endif
diff --git a/apt-private/private-search.cc b/apt-private/private-search.cc
new file mode 100644
index 0000000..19a3bf0
--- /dev/null
+++ b/apt-private/private-search.cc
@@ -0,0 +1,418 @@
+// Includes								/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/policy.h>
+#include <apt-pkg/progress.h>
+
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-json-hooks.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-search.h>
+#include <apt-private/private-show.h>
+
+#include <cstring>
+#include <iostream>
+#include <map>
+#include <sstream>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include <apti18n.h>
+									/*}}}*/
+
+static std::vector<pkgCache::DescIterator> const TranslatedDescriptionsList(pkgCache::VerIterator const &V) /*{{{*/
+{
+   std::vector<pkgCache::DescIterator> Descriptions;
+
+   for (std::string const &lang: APT::Configuration::getLanguages())
+   {
+      pkgCache::DescIterator Desc = V.TranslatedDescriptionForLanguage(lang);
+      if (Desc.IsGood())
+         Descriptions.push_back(Desc);
+   }
+
+   if (Descriptions.empty() && V.TranslatedDescription().IsGood())
+      Descriptions.push_back(V.TranslatedDescription());
+
+   return Descriptions;
+}
+
+									/*}}}*/
+static bool FullTextSearch(CommandLine &CmdL)				/*{{{*/
+{
+
+   CacheFile CacheFile;
+   CacheFile.GetDepCache();
+   pkgCache *Cache = CacheFile.GetPkgCache();
+   pkgDepCache::Policy *Plcy = CacheFile.GetPolicy();
+   if (unlikely(Cache == NULL || Plcy == NULL))
+      return false;
+
+   // Make sure there is at least one argument
+   unsigned int const NumPatterns = CmdL.FileSize() -1;
+   if (NumPatterns < 1)
+      return _error->Error(_("You must give at least one search pattern"));
+
+   RunJsonHook("AptCli::Hooks::Search", "org.debian.apt.hooks.search.pre", CmdL.FileList, CacheFile);
+
+#define APT_FREE_PATTERNS() for (std::vector<regex_t>::iterator P = Patterns.begin(); \
+      P != Patterns.end(); ++P) { regfree(&(*P)); }
+
+   // Compile the regex pattern
+   std::vector<regex_t> Patterns;
+   for (unsigned int I = 0; I != NumPatterns; ++I)
+   {
+      regex_t pattern;
+      if (regcomp(&pattern, CmdL.FileList[I + 1], REG_EXTENDED | REG_ICASE | REG_NOSUB) != 0)
+      {
+	 APT_FREE_PATTERNS();
+	 return _error->Error("Regex compilation error");
+      }
+      Patterns.push_back(pattern);
+   }
+
+   std::map<std::string, std::string> output_map;
+
+   LocalitySortedVersionSet bag;
+   OpTextProgress progress(*_config);
+   progress.OverallProgress(0, 100, 50,  _("Sorting"));
+   GetLocalitySortedVersionSet(CacheFile, &bag, &progress);
+   LocalitySortedVersionSet::iterator V = bag.begin();
+
+   progress.OverallProgress(50, 100, 50,  _("Full Text Search"));
+   progress.SubProgress(bag.size());
+   pkgRecords records(CacheFile);
+
+   std::string format = "${color:highlight}${Package}${color:neutral}/${Origin} ${Version} ${Architecture}${ }${apt:Status}\n";
+   if (_config->FindB("APT::Cache::ShowFull",false) == false)
+      format += "  ${Description}\n";
+   else
+      format += "  ${LongDescription}\n";
+
+   bool const NamesOnly = _config->FindB("APT::Cache::NamesOnly", false);
+   int Done = 0;
+   std::vector<bool> PkgsDone(Cache->Head().PackageCount, false);
+   for ( ;V != bag.end(); ++V)
+   {
+      if (Done%500 == 0)
+         progress.Progress(Done);
+      ++Done;
+
+      // we want to list each package only once
+      pkgCache::PkgIterator const P = V.ParentPkg();
+      if (PkgsDone[P->ID] == true)
+	 continue;
+
+      std::vector<std::string> PkgDescriptions;
+      if (not NamesOnly)
+      {
+         for (auto &Desc: TranslatedDescriptionsList(V))
+         {
+            pkgRecords::Parser &parser = records.Lookup(Desc.FileList());
+            PkgDescriptions.push_back(parser.LongDesc());
+         }
+      }
+
+      bool all_found = true;
+
+      char const * const PkgName = P.Name();
+      std::vector<bool> SkipDescription(PkgDescriptions.size(), false);
+      for (std::vector<regex_t>::const_iterator pattern = Patterns.begin();
+           pattern != Patterns.end(); ++pattern)
+      {
+         if (regexec(&(*pattern), PkgName, 0, 0, 0) == 0)
+            continue;
+         else if (not NamesOnly)
+         {
+            bool found = false;
+
+            for (std::vector<std::string>::size_type i = 0; i < PkgDescriptions.size(); ++i)
+            {
+               if (not SkipDescription[i])
+               {
+                  if (regexec(&(*pattern), PkgDescriptions[i].c_str(), 0, 0, 0) == 0)
+                     found = true;
+                  else
+                     SkipDescription[i] = true;
+               }
+            }
+
+            if (found)
+               continue;
+         }
+
+         // search patterns are AND, so one failing fails all
+         all_found = false;
+         break;
+      }
+
+      if (all_found == true)
+      {
+	 PkgsDone[P->ID] = true;
+	 std::stringstream outs;
+	 ListSingleVersion(CacheFile, records, V, outs, format);
+	 output_map.insert(std::make_pair<std::string, std::string>(
+		  PkgName, outs.str()));
+      }
+   }
+   APT_FREE_PATTERNS();
+   progress.Done();
+
+   // FIXME: SORT! and make sorting flexible (alphabetic, by pkg status)
+   // output the sorted map
+   std::map<std::string, std::string>::const_iterator K;
+   for (K = output_map.begin(); K != output_map.end(); ++K)
+      std::cout << (*K).second << std::endl;
+
+   if (output_map.empty())
+      RunJsonHook("AptCli::Hooks::Search", "org.debian.apt.hooks.search.fail", CmdL.FileList, CacheFile);
+   else
+      RunJsonHook("AptCli::Hooks::Search", "org.debian.apt.hooks.search.post", CmdL.FileList, CacheFile);
+   return true;
+}
+									/*}}}*/
+// LocalitySort - Sort a version list by package file locality		/*{{{*/
+static int LocalityCompare(const void * const a, const void * const b)
+{
+   pkgCache::VerFile const * const A = *static_cast<pkgCache::VerFile const * const *>(a);
+   pkgCache::VerFile const * const B = *static_cast<pkgCache::VerFile const * const *>(b);
+
+   if (A == 0 && B == 0)
+      return 0;
+   if (A == 0)
+      return 1;
+   if (B == 0)
+      return -1;
+
+   if (A->File == B->File)
+      return A->Offset - B->Offset;
+   return A->File - B->File;
+}
+void LocalitySort(pkgCache::VerFile ** const begin, unsigned long long const Count,size_t const Size)
+{
+   qsort(begin,Count,Size,LocalityCompare);
+}
+static void LocalitySort(pkgCache::DescFile ** const begin, unsigned long long const Count,size_t const Size)
+{
+   qsort(begin,Count,Size,LocalityCompare);
+}
+									/*}}}*/
+// Search - Perform a search						/*{{{*/
+// ---------------------------------------------------------------------
+/* This searches the package names and package descriptions for a pattern */
+struct ExDescFile
+{
+   pkgCache::DescFile *Df;
+   pkgCache::VerIterator V;
+   map_id_t ID;
+   ExDescFile() : Df(nullptr), ID(0) {}
+};
+static bool Search(CommandLine &CmdL)
+{
+   bool const ShowFull = _config->FindB("APT::Cache::ShowFull",false);
+   unsigned int const NumPatterns = CmdL.FileSize() -1;
+   
+   pkgCacheFile CacheFile;
+   pkgCache *Cache = CacheFile.GetPkgCache();
+   pkgDepCache::Policy *Plcy = CacheFile.GetPolicy();
+   if (unlikely(Cache == NULL || Plcy == NULL))
+      return false;
+
+   // Make sure there is at least one argument
+   if (NumPatterns < 1)
+      return _error->Error(_("You must give at least one search pattern"));
+   
+   // Compile the regex pattern
+   regex_t *Patterns = new regex_t[NumPatterns];
+   memset(Patterns,0,sizeof(*Patterns)*NumPatterns);
+   for (unsigned I = 0; I != NumPatterns; I++)
+   {
+      if (regcomp(&Patterns[I],CmdL.FileList[I+1],REG_EXTENDED | REG_ICASE | 
+		  REG_NOSUB) != 0)
+      {
+	 for (; I != 0; I--)
+	    regfree(&Patterns[I]);
+	 return _error->Error("Regex compilation error");
+      }      
+   }
+   
+   if (_error->PendingError() == true)
+   {
+      for (unsigned I = 0; I != NumPatterns; I++)
+	 regfree(&Patterns[I]);
+      return false;
+   }
+   
+   size_t const descCount = Cache->HeaderP->GroupCount + 1;
+   ExDescFile *DFList = new ExDescFile[descCount];
+
+   bool *PatternMatch = new bool[descCount * NumPatterns];
+   memset(PatternMatch,false,sizeof(*PatternMatch) * descCount * NumPatterns);
+
+   // Map versions that we want to write out onto the VerList array.
+   bool const NamesOnly = _config->FindB("APT::Cache::NamesOnly",false);
+   for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() == false; ++G)
+   {
+      size_t const PatternOffset = G->ID * NumPatterns;
+      size_t unmatched = 0, matched = 0;
+      for (unsigned I = 0; I < NumPatterns; ++I)
+      {
+	 if (PatternMatch[PatternOffset + I] == true)
+	    ++matched;
+	 else if (regexec(&Patterns[I],G.Name(),0,0,0) == 0)
+	    PatternMatch[PatternOffset + I] = true;
+	 else
+	    ++unmatched;
+      }
+
+      // already dealt with this package?
+      if (matched == NumPatterns)
+	 continue;
+
+      // Doing names only, drop any that don't match..
+      if (NamesOnly == true && unmatched == NumPatterns)
+	 continue;
+
+      // Find the proper version to use
+      pkgCache::PkgIterator P = G.FindPreferredPkg();
+      if (P.end() == true)
+	 continue;
+      pkgCache::VerIterator V = Plcy->GetCandidateVer(P);
+      if (V.end() == false)
+      {
+	 pkgCache::DescIterator const D = V.TranslatedDescription();
+	 //FIXME: packages without a description can't be found
+	 if (D.end() == true)
+	    continue;
+	 DFList[G->ID].Df = D.FileList();
+	 DFList[G->ID].V = V;
+	 DFList[G->ID].ID = G->ID;
+      }
+
+      if (unmatched == NumPatterns)
+	 continue;
+
+      // Include all the packages that provide matching names too
+      for (pkgCache::PrvIterator Prv = P.ProvidesList() ; Prv.end() == false; ++Prv)
+      {
+	 pkgCache::VerIterator V = Plcy->GetCandidateVer(Prv.OwnerPkg());
+	 if (V.end() == true)
+	    continue;
+
+	 unsigned long id = Prv.OwnerPkg().Group()->ID;
+	 pkgCache::DescIterator const D = V.TranslatedDescription();
+	 //FIXME: packages without a description can't be found
+	 if (D.end() == true)
+	    continue;
+	 DFList[id].Df = D.FileList();
+	 DFList[id].V = V;
+	 DFList[id].ID = id;
+
+	 size_t const PrvPatternOffset = id * NumPatterns;
+	 for (unsigned I = 0; I < NumPatterns; ++I)
+	    PatternMatch[PrvPatternOffset + I] |= PatternMatch[PatternOffset + I];
+      }
+   }
+
+   LocalitySort(&DFList->Df, Cache->HeaderP->GroupCount, sizeof(*DFList));
+
+   // Create the text record parser
+   pkgRecords Recs(*Cache);
+   // Iterate over all the version records and check them
+   for (ExDescFile *J = DFList; J->Df != 0; ++J)
+   {
+      size_t const PatternOffset = J->ID * NumPatterns;
+      if (not NamesOnly)
+      {
+         std::vector<std::string> PkgDescriptions;
+         for (auto &Desc: TranslatedDescriptionsList(J->V))
+         {
+            pkgRecords::Parser &parser = Recs.Lookup(Desc.FileList());
+            PkgDescriptions.push_back(parser.LongDesc());
+         }
+
+         std::vector<bool> SkipDescription(PkgDescriptions.size(), false);
+         for (unsigned I = 0; I < NumPatterns; ++I)
+         {
+            if (PatternMatch[PatternOffset + I])
+               continue;
+            else
+            {
+               bool found = false;
+
+               for (std::vector<std::string>::size_type k = 0; k < PkgDescriptions.size(); ++k)
+               {
+                  if (not SkipDescription[k])
+                  {
+                     if (regexec(&Patterns[I], PkgDescriptions[k].c_str(), 0, 0, 0) == 0)
+                     {
+                        found = true;
+                        PatternMatch[PatternOffset + I] = true;
+                     }
+                     else
+                        SkipDescription[k] = true;
+                  }
+               }
+
+               if (not found)
+                  break;
+            }
+         }
+      }
+
+      bool matchedAll = true;
+      for (unsigned I = 0; I < NumPatterns; ++I)
+	 if (PatternMatch[PatternOffset + I] == false)
+	 {
+	    matchedAll = false;
+	    break;
+	 }
+
+      if (matchedAll == true)
+      {
+	 if (ShowFull == true)
+	 {
+	    pkgCache::VerFileIterator Vf;
+	    auto &Parser = LookupParser(Recs, J->V, Vf);
+	    char const *Start, *Stop;
+	    Parser.GetRec(Start, Stop);
+	    size_t const Length = Stop - Start;
+	    DisplayRecordV1(CacheFile, Recs, J->V, Vf, Start, Length, std::cout);
+	 }
+	 else
+	 {
+	    pkgRecords::Parser &P = Recs.Lookup(pkgCache::DescFileIterator(*Cache, J->Df));
+	    printf("%s - %s\n", P.Name().c_str(), P.ShortDesc().c_str());
+	 }
+      }
+   }
+   
+   delete [] DFList;
+   delete [] PatternMatch;
+   for (unsigned I = 0; I != NumPatterns; I++)
+      regfree(&Patterns[I]);
+   delete [] Patterns;
+   if (ferror(stdout))
+       return _error->Error("Write to stdout failed");
+   return true;
+}
+									/*}}}*/
+bool DoSearch(CommandLine &CmdL)					/*{{{*/
+{
+   int const ShowVersion = _config->FindI("APT::Cache::Search::Version", 1);
+   if (ShowVersion <= 1)
+      return Search(CmdL);
+   return FullTextSearch(CmdL);
+}
+
diff --git a/apt-private/private-search.h b/apt-private/private-search.h
new file mode 100644
index 0000000..518f297
--- /dev/null
+++ b/apt-private/private-search.h
@@ -0,0 +1,12 @@
+#ifndef APT_PRIVATE_SEARCH_H
+#define APT_PRIVATE_SEARCH_H
+
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+
+class CommandLine;
+
+APT_PUBLIC bool DoSearch(CommandLine &CmdL);
+APT_PUBLIC void LocalitySort(pkgCache::VerFile ** const begin, unsigned long long const Count,size_t const Size);
+
+#endif
diff --git a/apt-private/private-show.cc b/apt-private/private-show.cc
new file mode 100644
index 0000000..cefbd9b
--- /dev/null
+++ b/apt-private/private-show.cc
@@ -0,0 +1,591 @@
+// Includes								/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/indexfile.h>
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgrecords.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/policy.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/tagfile-keys.h>
+#include <apt-pkg/tagfile.h>
+
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-install.h>
+#include <apt-private/private-show.h>
+
+#include <cstdio>
+#include <ostream>
+#include <string>
+#include <unistd.h>
+
+#include <apti18n.h>
+									/*}}}*/
+
+pkgRecords::Parser &LookupParser(pkgRecords &Recs, pkgCache::VerIterator const &V, pkgCache::VerFileIterator &Vf) /*{{{*/
+{
+   Vf = V.FileList();
+   for (; Vf.end() == false; ++Vf)
+      if ((Vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
+	 break;
+   if (Vf.end() == true)
+      Vf = V.FileList();
+   return Recs.Lookup(Vf);
+}
+									/*}}}*/
+static APT_PURE char const *skipDescription(char const *DescP, size_t const Length, bool fields) /*{{{*/
+{
+   auto const backup = DescP;
+   char const * const TagName = "\nDescription";
+   size_t const TagLen = strlen(TagName);
+   while ((DescP = static_cast<char const *>(memchr(DescP, '\n', Length - (DescP - backup)))) != nullptr)
+   {
+      if (DescP[1] == ' ')
+	 DescP += 2;
+      else if (fields && strncmp((char *)DescP, TagName, TagLen) == 0)
+	 DescP += TagLen;
+      else
+	 break;
+   }
+   if (DescP != NULL)
+      ++DescP;
+   return DescP;
+}
+									/*}}}*/
+static APT_PURE char const *findDescriptionField(char const *DescP, size_t const Length) /*{{{*/
+{
+   auto const backup = DescP;
+   char const * const TagName = "\nDescription";
+   size_t const TagLen = strlen(TagName);
+   while ((DescP = static_cast<char const *>(memchr(DescP, '\n', Length - (DescP - backup)))) != nullptr)
+   {
+      if (strncmp(DescP, TagName, TagLen) == 0)
+	 break;
+      else
+	 ++DescP;
+   }
+   if (DescP != nullptr)
+      ++DescP;
+   return DescP;
+}
+									/*}}}*/
+static APT_PURE char const *skipColonSpaces(char const *Buffer, size_t const Length) /*{{{*/
+{
+   // skipping withspace before and after the field-value separating colon
+   char const *const Start = Buffer;
+   for (; isspace(*Buffer) != 0 && Length - (Buffer - Start) > 0; ++Buffer)
+      ;
+   if (*Buffer != ':')
+      return nullptr;
+   ++Buffer;
+   for (; isspace(*Buffer) != 0 && Length - (Buffer - Start) > 0; ++Buffer)
+      ;
+   if (Length < static_cast<size_t>(Buffer - Start))
+      return nullptr;
+   return Buffer;
+}
+									/*}}}*/
+
+bool DisplayRecordV1(pkgCacheFile &, pkgRecords &Recs, /*{{{*/
+		     pkgCache::VerIterator const &V, pkgCache::VerFileIterator const &Vf,
+		     char const *Buffer, size_t Length, std::ostream &out)
+{
+   if (unlikely(Length < 4))
+      return false;
+
+   auto const Desc = V.TranslatedDescription();
+   if (Desc.end())
+   {
+      /* This handles the unusual case that we have no description whatsoever.
+	 The slightly more common case of only having a short-description embedded
+	 in the record could be handled here, but apt supports also having multiple
+	 descriptions embedded in the record, so we deal with that case later */
+      if (FileFd::Write(STDOUT_FILENO, Buffer, Length) == false)
+	 return false;
+      if (strncmp((Buffer + Length - 4), "\r\n\r\n", 4) != 0 &&
+	  strncmp((Buffer + Length - 2), "\n\n", 2) != 0)
+	 out << std::endl;
+      return true;
+   }
+
+   // Get a pointer to start of Description field
+   char const *DescP = findDescriptionField(Buffer, Length);
+   if (DescP == nullptr)
+      DescP = Buffer + Length;
+
+   // Write all but Description
+   size_t const untilDesc = DescP - Buffer;
+   if (untilDesc != 0 && FileFd::Write(STDOUT_FILENO, Buffer, untilDesc) == false)
+      return false;
+
+   // Show the right description
+   char desctag[50];
+   auto const langcode = Desc.LanguageCode();
+   if (strcmp(langcode, "") == 0)
+      strcpy(desctag, "\nDescription");
+   else
+      snprintf(desctag, sizeof(desctag), "\nDescription-%s", langcode);
+
+   out << desctag + 1 << ": " << std::flush;
+   auto const Df = Desc.FileList();
+   if (Df.end() == false)
+   {
+      if (Desc.FileList()->File == Vf->File)
+      {
+	 /* If we have the file already open look in the buffer for the
+	    description we want to display. Note that this might not be the
+	    only one we can encounter in this record */
+	 char const *Start = DescP;
+	 do
+	 {
+	    if (strncmp(Start, desctag + 1, strlen(desctag) - 1) != 0)
+	       continue;
+	    Start += strlen(desctag) - 1;
+	    Start = skipColonSpaces(Start, Length - (Start - Buffer));
+	    if (Start == nullptr)
+	       continue;
+	    char const *End = skipDescription(Start, Length - (Start - Buffer), false);
+	    if (likely(End != nullptr))
+	       FileFd::Write(STDOUT_FILENO, Start, End - (Start + 1));
+	    break;
+	 } while ((Start = findDescriptionField(Start, Length - (Start - Buffer))) != nullptr);
+      }
+      else
+      {
+	 pkgRecords::Parser &P = Recs.Lookup(Df);
+	 out << P.LongDesc();
+      }
+   }
+
+   out << std::endl << "Description-md5: " << Desc.md5() << std::endl;
+
+   // Find the first field after the description (if there is any)
+   DescP = skipDescription(DescP, Length - (DescP - Buffer), true);
+
+   // write the rest of the buffer, but skip mixed in Descriptions* fields
+   while (DescP != nullptr)
+   {
+      char const *const Start = DescP;
+      char const *End = findDescriptionField(DescP, Length - (DescP - Buffer));
+      if (End == nullptr)
+      {
+	 DescP = nullptr;
+	 End = Buffer + Length - 1;
+	 size_t endings = 0;
+	 while (*End == '\n')
+	 {
+	    --End;
+	    if (*End == '\r')
+	       --End;
+	    ++endings;
+	 }
+	 if (endings >= 1)
+	 {
+	    ++End;
+	    if (*End == '\r')
+	       ++End;
+	 }
+	 ++End;
+      }
+      else
+	 DescP = skipDescription(End + strlen("Description"), Length - (End - Buffer), true);
+
+      size_t const length = End - Start;
+      if (length != 0 && FileFd::Write(STDOUT_FILENO, Start, length) == false)
+	 return false;
+   }
+   // write a final newline after the last field
+   out << std::endl;
+
+   return true;
+}
+									/*}}}*/
+static bool DisplayRecordV2(pkgCacheFile &CacheFile, pkgRecords &Recs, /*{{{*/
+			    pkgCache::VerIterator const &V, pkgCache::VerFileIterator const &Vf,
+			    char const *Buffer, size_t const Length, std::ostream &out)
+{
+   // Check and load the package list file
+   pkgCache::PkgFileIterator I = Vf.File();
+
+   // find matching sources.list metaindex
+   pkgSourceList *SrcList = CacheFile.GetSourceList();
+   pkgIndexFile *Index;
+   if (SrcList->FindIndex(I, Index) == false &&
+       _system->FindIndex(I, Index) == false)
+      return _error->Error("Can not find indexfile for Package %s (%s)",
+			   V.ParentPkg().Name(), V.VerStr());
+   std::string source_index_file = Index->Describe(true);
+
+   // Read the record
+   pkgTagSection Tags;
+   if (Tags.Scan(Buffer, Length, true) == false)
+      return _error->Error("Internal Error, Unable to parse a package record");
+
+   // make size nice
+   std::string installed_size;
+   auto const installed_size_field = Tags.FindULL(pkgTagSection::Key::Installed_Size);
+   if (installed_size_field > 0)
+      installed_size = SizeToStr(installed_size_field * 1024).append("B");
+   else
+      installed_size = _("unknown");
+   std::string package_size;
+   auto const package_size_field = Tags.FindULL(pkgTagSection::Key::Size);
+   if (package_size_field > 0)
+      package_size = SizeToStr(package_size_field).append("B");
+   else
+      package_size = _("unknown");
+
+   const char *manual_installed = nullptr;
+   if (V.ParentPkg().CurrentVer() == V)
+   {
+      pkgDepCache *depCache = CacheFile.GetDepCache();
+      if (unlikely(depCache == nullptr))
+	 return false;
+      pkgDepCache::StateCache &state = (*depCache)[V.ParentPkg()];
+      manual_installed = !(state.Flags & pkgCache::Flag::Auto) ? "yes" : "no";
+   }
+
+   std::vector<pkgTagSection::Tag> RW;
+   // delete, apt-cache show has this info and most users do not care
+   if (not _config->FindB("APT::Cache::ShowFull", false))
+   {
+      for (char const * const * type = HashString::SupportedHashes(); *type != nullptr; ++type)
+	 RW.push_back(pkgTagSection::Tag::Remove(*type));
+      RW.push_back(pkgTagSection::Tag::Remove("Filename"));
+      RW.push_back(pkgTagSection::Tag::Remove("Multi-Arch"));
+      RW.push_back(pkgTagSection::Tag::Remove("Conffiles"));
+   }
+   RW.push_back(pkgTagSection::Tag::Remove("Architecture"));
+   // we use the translated description
+   RW.push_back(pkgTagSection::Tag::Remove("Description"));
+   RW.push_back(pkgTagSection::Tag::Remove("Description-md5"));
+   // improve
+   RW.push_back(pkgTagSection::Tag::Rewrite("Package", V.ParentPkg().FullName(true)));
+   RW.push_back(pkgTagSection::Tag::Rewrite("Installed-Size", installed_size));
+   RW.push_back(pkgTagSection::Tag::Remove("Size"));
+   RW.push_back(pkgTagSection::Tag::Rewrite("Download-Size", package_size));
+   // add
+   if (manual_installed != nullptr)
+      RW.push_back(pkgTagSection::Tag::Rewrite("APT-Manual-Installed", manual_installed));
+   RW.push_back(pkgTagSection::Tag::Rewrite("APT-Sources", source_index_file));
+
+   FileFd stdoutfd;
+   if (stdoutfd.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, false) == false ||
+	 Tags.Write(stdoutfd, TFRewritePackageOrder, RW) == false || stdoutfd.Close() == false)
+      return _error->Error("Internal Error, Unable to parse a package record");
+
+   // write the description
+   // FIXME: show (optionally) all available translations(?)
+   pkgCache::DescIterator Desc = V.TranslatedDescription();
+   if (Desc.end() == false)
+   {
+      pkgRecords::Parser &P = Recs.Lookup(Desc.FileList());
+      out << "Description: " << P.LongDesc();
+   }
+
+   // write a final newline (after the description)
+   out << std::endl << std::endl;
+
+   return true;
+}
+									/*}}}*/
+bool ShowPackage(CommandLine &CmdL)					/*{{{*/
+{
+   pkgCacheFile CacheFile;
+   CacheFile.InhibitActionGroups(true);
+   auto VolatileCmdL = GetAllPackagesAsPseudo(CacheFile.GetSourceList(), CmdL, AddVolatileBinaryFile, "");
+
+   if (unlikely(CacheFile.GetPkgCache() == nullptr))
+      return false;
+   CacheSetHelperVirtuals helper(true, GlobalError::NOTICE);
+   APT::CacheSetHelper::VerSelector const select = _config->FindB("APT::Cache::AllVersions", true) ?
+			APT::CacheSetHelper::ALL : APT::CacheSetHelper::CANDIDATE;
+   if (select == APT::CacheSetHelper::CANDIDATE && CacheFile.GetDepCache() == nullptr)
+      return false;
+
+   APT::VersionList verset;
+   size_t normalPackages = 0;
+   for (auto const &I: VolatileCmdL)
+   {
+      if (I.index == -1)
+      {
+	 APT::VersionContainerInterface::FromString(&verset, CacheFile, I.name, select, helper);
+	 ++normalPackages;
+      }
+      else
+      {
+	 if (select != APT::CacheSetHelper::CANDIDATE && unlikely(CacheFile.GetDepCache() == nullptr))
+	    return false;
+	 pkgCache::PkgIterator const P = CacheFile->FindPkg(I.name);
+	 if (unlikely(P.end()))
+	    continue;
+
+	 // Set any version providing the .deb as the candidate.
+	 for (auto Prv = P.ProvidesList(); Prv.end() == false; ++Prv)
+	 {
+	    if (I.release.empty())
+	       CacheFile->SetCandidateVersion(Prv.OwnerVer());
+	    else
+	       CacheFile->SetCandidateRelease(Prv.OwnerVer(), I.release);
+
+	    // via cacheset to have our usual handling
+	    APT::VersionContainerInterface::FromPackage(&verset, CacheFile, Prv.OwnerPkg(), APT::CacheSetHelper::CANDIDATE, helper);
+	 }
+      }
+   }
+
+   int const ShowVersion = _config->FindI("APT::Cache::Show::Version", 1);
+   pkgRecords Recs(CacheFile);
+   for (APT::VersionList::const_iterator Ver = verset.begin(); Ver != verset.end(); ++Ver)
+   {
+      pkgCache::VerFileIterator Vf;
+      auto &Parser = LookupParser(Recs, Ver, Vf);
+      char const *Start, *Stop;
+      Parser.GetRec(Start, Stop);
+      size_t const Length = Stop - Start;
+
+      if (ShowVersion <= 1)
+      {
+	 if (DisplayRecordV1(CacheFile, Recs, Ver, Vf, Start, Length, std::cout) == false)
+	    return false;
+      }
+      else if (DisplayRecordV2(CacheFile, Recs, Ver, Vf, Start, Length + 1, c1out) == false)
+	 return false;
+   }
+
+   if (select == APT::CacheSetHelper::CANDIDATE && normalPackages != 0)
+   {
+      APT::VersionList verset_all;
+      for (auto const &I: VolatileCmdL)
+      {
+	 if (I.index == -1)
+	    APT::VersionContainerInterface::FromString(&verset_all, CacheFile, I.name, APT::CacheSetHelper::ALL, helper);
+	 else
+	 {
+	    pkgCache::PkgIterator const P = CacheFile->FindPkg(I.name);
+	    if (unlikely(P.end()))
+	       continue;
+
+	    // Set any version providing the .deb as the candidate.
+	    for (auto Prv = P.ProvidesList(); Prv.end() == false; ++Prv)
+	    {
+	       if (I.release.empty())
+		  CacheFile->SetCandidateVersion(Prv.OwnerVer());
+	       else
+		  CacheFile->SetCandidateRelease(Prv.OwnerVer(), I.release);
+
+	       // via cacheset to have our usual virtual handling
+	       APT::VersionContainerInterface::FromPackage(&verset_all, CacheFile, Prv.OwnerPkg(), APT::CacheSetHelper::CANDIDATE, helper);
+	    }
+	 }
+      }
+
+      int const records = verset_all.size() - verset.size();
+      if (records > 0)
+         _error->Notice(P_("There is %i additional record. Please use the '-a' switch to see it", "There are %i additional records. Please use the '-a' switch to see them.", records), records);
+   }
+
+   if (_config->FindB("APT::Cache::ShowVirtuals", false) == true)
+      for (APT::PackageSet::const_iterator Pkg = helper.virtualPkgs.begin();
+	    Pkg != helper.virtualPkgs.end(); ++Pkg)
+      {
+	 c1out << "Package: " << Pkg.FullName(true) << std::endl;
+	 c1out << "State: " << _("not a real package (virtual)") << std::endl;
+	 // FIXME: show providers, see private-cacheset.h
+	 //        CacheSetHelperAPTGet::showVirtualPackageErrors()
+      }
+
+   if (verset.empty() == true)
+   {
+      if (helper.virtualPkgs.empty() == true)
+        return _error->Error(_("No packages found"));
+      else
+        _error->Notice(_("No packages found"));
+   }
+
+   return true;
+}
+									/*}}}*/
+static std::string Sha1FromString(std::string const &input)		/*{{{*/
+{
+   // XXX: move to hashes.h: HashString::FromString() ?
+   Hashes sha1(Hashes::SHA1SUM);
+   sha1.Add(input.c_str(), input.length());
+   return sha1.GetHashString(Hashes::SHA1SUM).HashValue();
+}
+									/*}}}*/
+bool ShowSrcPackage(CommandLine &CmdL)					/*{{{*/
+{
+   pkgCacheFile CacheFile;
+   pkgSourceList *List = CacheFile.GetSourceList();
+   if (unlikely(List == NULL))
+      return false;
+
+   // Create the text record parsers
+   pkgSrcRecords SrcRecs(*List);
+   if (_error->PendingError() == true)
+      return false;
+
+   bool found = false;
+   // avoid showing identical records
+   std::set<std::string> seen;
+   for (const char **I = CmdL.FileList + 1; *I != 0; I++)
+   {
+      SrcRecs.Restart();
+
+      pkgSrcRecords::Parser *Parse;
+      bool found_this = false;
+      while ((Parse = SrcRecs.Find(*I,false)) != 0) {
+	 // SrcRecs.Find() will find both binary and source names
+	 if (_config->FindB("APT::Cache::Only-Source", false) == true)
+	    if (Parse->Package() != *I)
+	       continue;
+         std::string sha1str = Sha1FromString(Parse->AsStr());
+         if (std::find(seen.begin(), seen.end(), sha1str) == seen.end())
+         {
+            std::cout << Parse->AsStr() << std::endl;;
+            found = true;
+            found_this = true;
+            seen.insert(sha1str);
+         }
+      }
+      if (found_this == false) {
+	 _error->Warning(_("Unable to locate package %s"),*I);
+	 continue;
+      }
+   }
+   if (found == false)
+      _error->Notice(_("No packages found"));
+   return true;
+}
+									/*}}}*/
+// Policy - Show the results of the preferences file			/*{{{*/
+bool Policy(CommandLine &CmdL)
+{
+   pkgCacheFile CacheFile;
+   pkgSourceList const * const SrcList = CacheFile.GetSourceList();
+   if (unlikely(SrcList == nullptr))
+      return false;
+   pkgCache * const Cache = CacheFile.GetPkgCache();
+   if (unlikely(Cache == nullptr))
+      return false;
+   pkgPolicy * const Plcy = CacheFile.GetPolicy();
+   if (unlikely(Plcy == nullptr))
+      return false;
+
+   // Print out all of the package files
+   if (CmdL.FileList[1] == 0)
+   {
+      std::cout << _("Package files:") << std::endl;
+      for (pkgCache::PkgFileIterator F = Cache->FileBegin(); F.end() == false; ++F)
+      {
+	 if (F.Flagged(pkgCache::Flag::NoPackages))
+	    continue;
+	 // Locate the associated index files so we can derive a description
+	 pkgIndexFile *Indx;
+	 if (SrcList->FindIndex(F,Indx) == false &&
+	       _system->FindIndex(F,Indx) == false)
+	    return _error->Error(_("Cache is out of sync, can't x-ref a package file"));
+
+	 printf("%4i %s\n",
+	       Plcy->GetPriority(F),Indx->Describe(true).c_str());
+
+	 // Print the reference information for the package
+	 std::string Str = F.RelStr();
+	 if (Str.empty() == false)
+	    printf("     release %s\n",F.RelStr().c_str());
+	 if (F.Site() != 0 && F.Site()[0] != 0)
+	    printf("     origin %s\n",F.Site());
+      }
+
+      // Show any packages have explicit pins
+      std::cout << _("Pinned packages:") << std::endl;
+      pkgCache::PkgIterator I = Cache->PkgBegin();
+      for (;I.end() != true; ++I)
+      {
+	 for (pkgCache::VerIterator V = I.VersionList(); !V.end(); ++V) {
+	    auto Prio = Plcy->GetPriority(V, false);
+	    if (Prio == 0)
+	       continue;
+
+	    std::cout << "     ";
+	    // Print the package name and the version we are forcing to
+	    ioprintf(std::cout, _("%s -> %s with priority %d\n"), I.FullName(true).c_str(), V.VerStr(), Prio);
+	 }
+      }
+      return true;
+   }
+
+   char const * const msgInstalled = _("  Installed: ");
+   char const * const msgCandidate = _("  Candidate: ");
+   short const InstalledLessCandidate =
+      mbstowcs(NULL, msgInstalled, 0) - mbstowcs(NULL, msgCandidate, 0);
+   short const deepInstalled =
+      (InstalledLessCandidate < 0 ? (InstalledLessCandidate*-1) : 0) - 1;
+   short const deepCandidate =
+      (InstalledLessCandidate > 0 ? (InstalledLessCandidate) : 0) - 1;
+
+   // Print out detailed information for each package
+   APT::CacheSetHelper helper(true, GlobalError::NOTICE);
+   APT::PackageList pkgset = APT::PackageList::FromCommandLine(CacheFile, CmdL.FileList + 1, helper);
+   for (APT::PackageList::const_iterator Pkg = pkgset.begin(); Pkg != pkgset.end(); ++Pkg)
+   {
+      std::cout << Pkg.FullName(true) << ":" << std::endl;
+
+      // Installed version
+      std::cout << msgInstalled << OutputInDepth(deepInstalled, " ");
+      if (Pkg->CurrentVer == 0)
+	 std::cout << _("(none)") << std::endl;
+      else
+	 std::cout << Pkg.CurrentVer().VerStr() << std::endl;
+
+      // Candidate Version 
+      std::cout << msgCandidate << OutputInDepth(deepCandidate, " ");
+      pkgCache::VerIterator V = Plcy->GetCandidateVer(Pkg);
+      if (V.end() == true)
+	 std::cout << _("(none)") << std::endl;
+      else
+	 std::cout << V.VerStr() << std::endl;
+
+      // Show the priority tables
+      std::cout << _("  Version table:") << std::endl;
+      for (V = Pkg.VersionList(); V.end() == false; ++V)
+      {
+	 if (Pkg.CurrentVer() == V)
+	    std::cout << " *** " << V.VerStr();
+	 else
+	    std::cout << "     " << V.VerStr();
+
+	 std::cout << " " << Plcy->GetPriority(V);
+
+	 if (V.PhasedUpdatePercentage() != 100)
+	    std::cout << " "
+		      << "(" << _("phased") << " " << V.PhasedUpdatePercentage() << "%)";
+
+	 std::cout << std::endl;
+	 for (pkgCache::VerFileIterator VF = V.FileList(); VF.end() == false; ++VF)
+	 {
+	    // Locate the associated index files so we can derive a description
+	    pkgIndexFile *Indx;
+	    if (SrcList->FindIndex(VF.File(),Indx) == false &&
+		  _system->FindIndex(VF.File(),Indx) == false)
+	       return _error->Error(_("Cache is out of sync, can't x-ref a package file"));
+	    printf("       %4i %s\n",Plcy->GetPriority(VF.File()),
+		  Indx->Describe(true).c_str());
+	 }
+      }
+   }
+   return true;
+}
+									/*}}}*/
diff --git a/apt-private/private-show.h b/apt-private/private-show.h
new file mode 100644
index 0000000..9e5fa99
--- /dev/null
+++ b/apt-private/private-show.h
@@ -0,0 +1,22 @@
+#ifndef APT_PRIVATE_SHOW_H
+#define APT_PRIVATE_SHOW_H
+
+#include <apt-pkg/macros.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/pkgrecords.h>
+
+#include <iostream>
+
+class CommandLine;
+class pkgCacheFile;
+
+APT_PUBLIC bool ShowPackage(CommandLine &CmdL);
+APT_PUBLIC bool ShowSrcPackage(CommandLine &CmdL);
+APT_PUBLIC bool Policy(CommandLine &CmdL);
+
+pkgRecords::Parser &LookupParser(pkgRecords &Recs, pkgCache::VerIterator const &V, pkgCache::VerFileIterator &Vf);
+bool DisplayRecordV1(pkgCacheFile &CacheFile, pkgRecords &Recs,
+		     pkgCache::VerIterator const &V, pkgCache::VerFileIterator const &Vf,
+		     char const *Buffer, size_t const Length, std::ostream &out);
+
+#endif
diff --git a/apt-private/private-source.cc b/apt-private/private-source.cc
new file mode 100644
index 0000000..9b9409c
--- /dev/null
+++ b/apt-private/private-source.cc
@@ -0,0 +1,899 @@
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/algorithms.h>
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/depcache.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/indexfile.h>
+#include <apt-pkg/metaindex.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/policy.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/srcrecords.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/version.h>
+
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-download.h>
+#include <apt-private/private-install.h>
+#include <apt-private/private-source.h>
+
+#include <apt-pkg/debindexfile.h>
+#include <apt-pkg/deblistparser.h>
+
+#include <cstddef>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <iostream>
+#include <set>
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// GetReleaseFileForSourceRecord - Return Suite for the given srcrecord	/*{{{*/
+static pkgCache::RlsFileIterator GetReleaseFileForSourceRecord(CacheFile &CacheFile,
+      pkgSourceList const * const SrcList, pkgSrcRecords::Parser const * const Parse)
+{
+   // try to find release
+   const pkgIndexFile& CurrentIndexFile = Parse->Index();
+
+   for (pkgSourceList::const_iterator S = SrcList->begin(); 
+	 S != SrcList->end(); ++S)
+   {
+      std::vector<pkgIndexFile *> *Indexes = (*S)->GetIndexFiles();
+      for (std::vector<pkgIndexFile *>::const_iterator IF = Indexes->begin();
+	    IF != Indexes->end(); ++IF)
+      {
+	 if (&CurrentIndexFile == (*IF))
+	    return (*S)->FindInCache(CacheFile, false);
+      }
+   }
+   return pkgCache::RlsFileIterator(CacheFile);
+}
+									/*}}}*/
+// FindSrc - Find a source record					/*{{{*/
+static pkgSrcRecords::Parser *FindSrc(const char *Name,
+			       pkgSrcRecords &SrcRecs,std::string &Src,
+			       CacheFile &Cache)
+{
+   std::string VerTag, UserRequestedVerTag;
+   std::string ArchTag = "";
+   std::string RelTag = _config->Find("APT::Default-Release");
+   std::string TmpSrc = Name;
+
+   // extract release
+   size_t found = TmpSrc.find_last_of("/");
+   if (found != std::string::npos)
+   {
+      RelTag = TmpSrc.substr(found+1);
+      TmpSrc = TmpSrc.substr(0,found);
+   }
+   // extract the version
+   found = TmpSrc.find_last_of("=");
+   if (found != std::string::npos)
+   {
+      VerTag = UserRequestedVerTag = TmpSrc.substr(found+1);
+      TmpSrc = TmpSrc.substr(0,found);
+   }
+   // extract arch
+   found = TmpSrc.find_last_of(":");
+   if (found != std::string::npos)
+   {
+      ArchTag = TmpSrc.substr(found+1);
+      TmpSrc = TmpSrc.substr(0,found);
+   }
+
+   /* Lookup the version of the package we would install if we were to
+      install a version and determine the source package name, then look
+      in the archive for a source package of the same name. */
+   bool MatchSrcOnly = _config->FindB("APT::Get::Only-Source");
+   pkgCache::PkgIterator Pkg;
+   if (ArchTag != "")
+      Pkg = Cache.GetPkgCache()->FindPkg(TmpSrc, ArchTag);
+   else
+      Pkg = Cache.GetPkgCache()->FindPkg(TmpSrc);
+
+   // if we can't find a package but the user qualified with a arch,
+   // error out here
+   if (Pkg.end() && ArchTag != "")
+   {
+      Src = Name;
+      _error->Error(_("Can not find a package for architecture '%s'"),
+	    ArchTag.c_str());
+      return 0;
+   }
+
+   if (MatchSrcOnly == false && Pkg.end() == false)
+   {
+      if(VerTag != "" || RelTag != "" || ArchTag != "")
+      {
+	 bool fuzzy = false;
+	 // we have a default release, try to locate the pkg. we do it like
+	 // this because GetCandidateVer() will not "downgrade", that means
+	 // "apt-get source -t stable apt" won't work on a unstable system
+	 for (pkgCache::VerIterator Ver = Pkg.VersionList();; ++Ver)
+	 {
+	    // try first only exact matches, later fuzzy matches
+	    if (Ver.end() == true)
+	    {
+	       if (fuzzy == true)
+		  break;
+	       fuzzy = true;
+	       Ver = Pkg.VersionList();
+	       // exit right away from the Pkg.VersionList() loop if we
+	       // don't have any versions
+	       if (Ver.end() == true)
+		  break;
+	    }
+
+	    // ignore arches that are not for us
+	    if (ArchTag != "" && Ver.Arch() != ArchTag)
+	       continue;
+
+	    // pick highest version for the arch unless the user wants
+	    // something else
+	    if (ArchTag != "" && VerTag == "" && RelTag == "")
+	       if(Cache.GetPkgCache()->VS->CmpVersion(VerTag, Ver.VerStr()) < 0)
+		  VerTag = Ver.VerStr();
+
+	    // We match against a concrete version (or a part of this version)
+	    if (VerTag.empty() == false &&
+		  (fuzzy == true || Cache.GetPkgCache()->VS->CmpVersion(VerTag, Ver.VerStr()) != 0) && // exact match
+		  (fuzzy == false || strncmp(VerTag.c_str(), Ver.VerStr(), VerTag.size()) != 0)) // fuzzy match
+	       continue;
+
+	    for (pkgCache::VerFileIterator VF = Ver.FileList();
+		  VF.end() == false; ++VF)
+	    {
+	       /* If this is the status file, and the current version is not the
+		  version in the status file (ie it is not installed, or somesuch)
+		  then it is not a candidate for installation, ever. This weeds
+		  out bogus entries that may be due to config-file states, or
+		  other. */
+	       if ((VF.File()->Flags & pkgCache::Flag::NotSource) ==
+		     pkgCache::Flag::NotSource && Pkg.CurrentVer() != Ver)
+		  continue;
+
+	       // or we match against a release
+	       if(VerTag.empty() == false ||
+		     (VF.File().Archive() != 0 && VF.File().Archive() == RelTag) ||
+		     (VF.File().Codename() != 0 && VF.File().Codename() == RelTag))
+	       {
+		  // the Version we have is possibly fuzzy or includes binUploads,
+		  // so we use the Version of the SourcePkg (empty if same as package)
+		  Src = Ver.SourcePkgName();
+		  VerTag = Ver.SourceVerStr();
+		  break;
+	       }
+	    }
+	    if (Src.empty() == false)
+	       break;
+	 }
+      }
+
+      if (Src.empty() == true && ArchTag.empty() == false)
+      {
+	 if (VerTag.empty() == false)
+	    _error->Error(_("Can not find a package '%s' with version '%s'"),
+		  Pkg.FullName().c_str(), VerTag.c_str());
+	 if (RelTag.empty() == false)
+	    _error->Error(_("Can not find a package '%s' with release '%s'"),
+		  Pkg.FullName().c_str(), RelTag.c_str());
+	 Src = Name;
+	 return 0;
+      }
+
+
+      if (Src.empty() == true)
+      {
+	 // if we don't have found a fitting package yet so we will
+	 // choose a good candidate and proceed with that.
+	 // Maybe we will find a source later on with the right VerTag
+	 // or RelTag
+	 if (Cache.BuildPolicy() == false)
+	    return nullptr;
+	 pkgPolicy * const Policy = Cache.GetPolicy();
+	 pkgCache::VerIterator const Ver = Policy->GetCandidateVer(Pkg);
+	 if (Ver.end() == false)
+	 {
+	    if (strcmp(Ver.SourcePkgName(),Ver.ParentPkg().Name()) != 0)
+	       Src = Ver.SourcePkgName();
+	    if (VerTag.empty() == true && strcmp(Ver.SourceVerStr(),Ver.VerStr()) != 0)
+	       VerTag = Ver.SourceVerStr();
+	 }
+      }
+   }
+
+   if (Src.empty() == true)
+   {
+      Src = TmpSrc;
+   }
+   else 
+   {
+      /* if we have a source pkg name, make sure to only search
+	 for srcpkg names, otherwise apt gets confused if there
+	 is a binary package "pkg1" and a source package "pkg1"
+	 with the same name but that comes from different packages */
+      MatchSrcOnly = true;
+      if (Src != TmpSrc) 
+      {
+	 ioprintf(c1out, _("Picking '%s' as source package instead of '%s'\n"), Src.c_str(), TmpSrc.c_str());
+      }
+   }
+
+   // The best hit
+   pkgSrcRecords::Parser *Last = 0;
+   unsigned long Offset = 0;
+   std::string Version;
+   pkgSourceList const * const SrcList = Cache.GetSourceList();
+   pkgVersionMatch RelTagMatch{RelTag, pkgVersionMatch::Release};
+
+   /* Iterate over all of the hits, which includes the resulting
+      binary packages in the search */
+	       pkgSrcRecords::Parser *Parse;
+	       while (true)
+	       {
+		  SrcRecs.Restart();
+		  while ((Parse = SrcRecs.Find(Src.c_str(), MatchSrcOnly)) != 0)
+		  {
+		     const std::string Ver = Parse->Version();
+
+		     // See if we need to look for a specific release tag
+		     if (RelTag.empty() == false && UserRequestedVerTag.empty() == true)
+		     {
+			pkgCache::RlsFileIterator const Rls = GetReleaseFileForSourceRecord(Cache, SrcList, Parse);
+			if (not Rls.end() && not RelTagMatch.FileMatch(Rls))
+			   continue;
+		     }
+
+		     // Ignore all versions which doesn't fit
+		     if (VerTag.empty() == false &&
+			   Cache.GetPkgCache()->VS->CmpVersion(VerTag, Ver) != 0) // exact match
+			continue;
+
+		     // Newer version or an exact match? Save the hit
+		     if (Last == 0 || Cache.GetPkgCache()->VS->CmpVersion(Version,Ver) < 0) {
+			Last = Parse;
+			Offset = Parse->Offset();
+			Version = Ver;
+		     }
+
+		     // was the version check above an exact match?
+		     // If so, we don't need to look further
+		     if (VerTag.empty() == false && (VerTag == Ver))
+			break;
+		  }
+		  if (UserRequestedVerTag == "" && Version != "" && RelTag != "")
+		     ioprintf(c1out, "Selected version '%s' (%s) for %s\n",
+			   Version.c_str(), RelTag.c_str(), Src.c_str());
+
+		  if (Last != 0 || VerTag.empty() == true)
+		     break;
+		  _error->Error(_("Can not find version '%s' of package '%s'"), VerTag.c_str(), TmpSrc.c_str());
+		  return 0;
+	       }
+
+	       if (Last == 0 || Last->Jump(Offset) == false)
+		  return 0;
+
+	       return Last;
+}
+									/*}}}*/
+// DoSource - Fetch a source archive					/*{{{*/
+// ---------------------------------------------------------------------
+/* Fetch source packages */
+struct DscFile
+{
+   std::string Package;
+   std::string Version;
+   std::string Dsc;
+};
+bool DoSource(CommandLine &CmdL)
+{
+   if (CmdL.FileSize() <= 1)
+      return _error->Error(_("Must specify at least one package to fetch source for"));
+
+   CacheFile Cache;
+   if (Cache.BuildCaches(false) == false)
+      return false;
+
+   // Create the text record parsers
+   pkgSourceList * const List = Cache.GetSourceList();
+   pkgSrcRecords SrcRecs(*List);
+   if (_error->PendingError() == true)
+      return false;
+
+   std::vector<DscFile> Dsc;
+   Dsc.reserve(CmdL.FileSize());
+
+   // insert all downloaded uris into this set to avoid downloading them
+   // twice
+   std::set<std::string> queued;
+
+   // Diff only mode only fetches .diff files
+   bool const diffOnly = _config->FindB("APT::Get::Diff-Only", false);
+   // Tar only mode only fetches .tar files
+   bool const tarOnly = _config->FindB("APT::Get::Tar-Only", false);
+   // Dsc only mode only fetches .dsc files
+   bool const dscOnly = _config->FindB("APT::Get::Dsc-Only", false);
+
+   // Load the requested sources into the fetcher
+   aptAcquireWithTextStatus Fetcher;
+   std::vector<std::string> UntrustedList;
+   for (const char **cmdl = CmdL.FileList + 1; *cmdl != 0; ++cmdl)
+   {
+      std::string Src;
+      pkgSrcRecords::Parser *Last = FindSrc(*cmdl, SrcRecs, Src, Cache);
+      if (Last == 0) {
+	 return _error->Error(_("Unable to find a source package for %s"),Src.c_str());
+      }
+
+      if (Last->Index().IsTrusted() == false)
+	 UntrustedList.push_back(Src);
+
+      std::string srec = Last->AsStr();
+      std::string::size_type pos = srec.find("\nVcs-");
+      while (pos != std::string::npos)
+      {
+	 pos += strlen("\nVcs-");
+	 std::string vcs = srec.substr(pos,srec.find(":",pos)-pos);
+	 if(vcs == "Browser") 
+	 {
+	    pos = srec.find("\nVcs-", pos);
+	    continue;
+	 }
+	 pos += vcs.length()+2;
+	 std::string::size_type epos = srec.find("\n", pos);
+	 std::string const uri = srec.substr(pos,epos-pos);
+	 ioprintf(c1out, _("NOTICE: '%s' packaging is maintained in "
+		  "the '%s' version control system at:\n"
+		  "%s\n"),
+	       Src.c_str(), vcs.c_str(), uri.c_str());
+	 std::string vcscmd;
+	 if (vcs == "Bzr")
+	    vcscmd = "bzr branch " + uri;
+	 else if (vcs == "Git")
+	    vcscmd = "git clone " + uri;
+
+	 if (vcscmd.empty() == false)
+	    ioprintf(c1out,_("Please use:\n%s\n"
+		     "to retrieve the latest (possibly unreleased) "
+		     "updates to the package.\n"),
+		  vcscmd.c_str());
+	 break;
+      }
+
+      // Back track
+      std::vector<pkgSrcRecords::File> Lst;
+      if (Last->Files(Lst) == false) {
+	 return false;
+      }
+
+      DscFile curDsc;
+      // Load them into the fetcher
+      for (std::vector<pkgSrcRecords::File>::const_iterator I = Lst.begin();
+	    I != Lst.end(); ++I)
+      {
+	 // Try to guess what sort of file it is we are getting.
+	 if (I->Type == "dsc")
+	 {
+	    curDsc.Package = Last->Package();
+	    curDsc.Version = Last->Version();
+	    curDsc.Dsc = flNotDir(I->Path);
+	 }
+
+	 // Handle the only options so that multiple can be used at once
+	 if (diffOnly == true || tarOnly == true || dscOnly == true)
+	 {
+	    if ((diffOnly == true && I->Type == "diff") ||
+		  (tarOnly == true && I->Type == "tar") ||
+		  (dscOnly == true && I->Type == "dsc"))
+	       ; // Fine, we want this file downloaded
+	    else
+	       continue;
+	 }
+
+	 // don't download the same uri twice (should this be moved to
+	 // the fetcher interface itself?)
+	 if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
+	    continue;
+	 queued.insert(Last->Index().ArchiveURI(I->Path));
+
+	 // check if we have a file with that md5 sum already localy
+	 std::string localFile = flNotDir(I->Path);
+	 if (FileExists(localFile) == true)
+	    if(I->Hashes.VerifyFile(localFile) == true)
+	    {
+	       ioprintf(c1out,_("Skipping already downloaded file '%s'\n"),
+		     localFile.c_str());
+	       continue;
+	    }
+
+	 // see if we have a hash (Acquire::ForceHash is the only way to have none)
+	 if (I->Hashes.usable() == false && _config->FindB("APT::Get::AllowUnauthenticated",false) == false)
+	 {
+	    ioprintf(c1out, "Skipping download of file '%s' as requested hashsum is not available for authentication\n",
+		  localFile.c_str());
+	    curDsc.Dsc.clear();
+	    continue;
+	 }
+
+	 new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
+	       I->Hashes, I->FileSize, Last->Index().SourceInfo(*Last,*I), Src);
+      }
+      Dsc.push_back(std::move(curDsc));
+   }
+
+   // Display statistics
+   unsigned long long FetchBytes = Fetcher.FetchNeeded();
+   unsigned long long FetchPBytes = Fetcher.PartialPresent();
+   unsigned long long DebBytes = Fetcher.TotalNeeded();
+
+   if (CheckFreeSpaceBeforeDownload(".", (FetchBytes - FetchPBytes)) == false)
+      return false;
+
+   // Number of bytes
+   if (DebBytes != FetchBytes)
+      //TRANSLATOR: The required space between number and unit is already included
+      // in the replacement strings, so %sB will be correctly translate in e.g. 1,5 MB
+      ioprintf(c1out,_("Need to get %sB/%sB of source archives.\n"),
+	    SizeToStr(FetchBytes).c_str(),SizeToStr(DebBytes).c_str());
+   else
+      //TRANSLATOR: The required space between number and unit is already included
+      // in the replacement string, so %sB will be correctly translate in e.g. 1,5 MB
+      ioprintf(c1out,_("Need to get %sB of source archives.\n"),
+	    SizeToStr(DebBytes).c_str());
+
+   if (_config->FindB("APT::Get::Simulate",false) == true)
+   {
+      for (auto const &D: Dsc)
+	 ioprintf(std::cout, _("Fetch source %s\n"), D.Package.c_str());
+      return true;
+   }
+
+   // Just print out the uris an exit if the --print-uris flag was used
+   if (_config->FindB("APT::Get::Print-URIs") == true)
+   {
+      pkgAcquire::UriIterator I = Fetcher.UriBegin();
+      for (; I != Fetcher.UriEnd(); ++I)
+	 std::cout << '\'' << I->URI << "' " << flNotDir(I->Owner->DestFile) << ' ' <<
+	    std::to_string(I->Owner->FileSize) << ' ' << I->Owner->HashSum() << std::endl;
+      return true;
+   }
+
+   // check authentication status of the source as well
+   if (UntrustedList.empty() == false && AuthPrompt(UntrustedList, false) == false)
+      return false;
+
+   // Run it
+   bool Failed = false;
+   if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
+      return _error->Error(_("Failed to fetch some archives."));
+
+   if (diffOnly || tarOnly || dscOnly || _config->FindB("APT::Get::Download-only",false) == true)
+   {
+      c1out << _("Download complete and in download only mode") << std::endl;
+      return true;
+   }
+
+   bool const fixBroken = _config->FindB("APT::Get::Fix-Broken", false);
+   bool SaidCheckIfDpkgDev = false;
+   for (auto const &D: Dsc)
+   {
+      if (unlikely(D.Dsc.empty() == true))
+	 continue;
+      std::string const Dir = D.Package + '-' + Cache.GetPkgCache()->VS->UpstreamVersion(D.Version.c_str());
+
+      // See if the package is already unpacked
+      struct stat Stat;
+      if (fixBroken == false && stat(Dir.c_str(),&Stat) == 0 &&
+	    S_ISDIR(Stat.st_mode) != 0)
+      {
+	 ioprintf(c0out ,_("Skipping unpack of already unpacked source in %s\n"),
+	       Dir.c_str());
+      }
+      else
+      {
+	 // Call dpkg-source
+	 std::string const sourceopts = _config->Find("DPkg::Source-Options", "--no-check -x");
+	 std::string S;
+	 strprintf(S, "%s %s %s",
+	       _config->Find("Dir::Bin::dpkg-source","dpkg-source").c_str(),
+	       sourceopts.c_str(), D.Dsc.c_str());
+	 if (system(S.c_str()) != 0)
+	 {
+	    _error->Error(_("Unpack command '%s' failed.\n"), S.c_str());
+	    if (SaidCheckIfDpkgDev == false)
+	    {
+	       _error->Notice(_("Check if the 'dpkg-dev' package is installed.\n"));
+	       SaidCheckIfDpkgDev = true;
+	    }
+	    continue;
+	 }
+      }
+
+      // Try to compile it with dpkg-buildpackage
+      if (_config->FindB("APT::Get::Compile",false) == true)
+      {
+	 std::string buildopts = _config->Find("APT::Get::Host-Architecture");
+	 if (buildopts.empty() == false)
+	    buildopts = "-a" + buildopts + " ";
+
+	 // get all active build profiles
+	 std::string const profiles = APT::Configuration::getBuildProfilesString();
+	 if (profiles.empty() == false)
+	    buildopts.append(" -P").append(profiles).append(" ");
+
+	 buildopts.append(_config->Find("DPkg::Build-Options","-b -uc"));
+
+	 // Call dpkg-buildpackage
+	 std::string S;
+	 strprintf(S, "cd %s && %s %s",
+	       Dir.c_str(),
+	       _config->Find("Dir::Bin::dpkg-buildpackage","dpkg-buildpackage").c_str(),
+	       buildopts.c_str());
+
+	 if (system(S.c_str()) != 0)
+	 {
+	    _error->Error(_("Build command '%s' failed.\n"), S.c_str());
+	    continue;
+	 }
+      }
+   }
+   return true;
+}
+									/*}}}*/
+// DoBuildDep - Install/removes packages to satisfy build dependencies  /*{{{*/
+// ---------------------------------------------------------------------
+/* This function will look at the build depends list of the given source 
+   package and install the necessary packages to make it true, or fail. */
+static std::vector<pkgSrcRecords::Parser::BuildDepRec> GetBuildDeps(pkgSrcRecords::Parser * const Last,
+      char const * const Src, std::string const &hostArch)
+{
+   std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
+   // FIXME: Can't specify architecture to use for [wildcard] matching, so switch default arch temporary
+   if (hostArch.empty() == false)
+   {
+      std::string nativeArch = _config->Find("APT::Architecture");
+      _config->Set("APT::Architecture", hostArch);
+      bool Success = Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), false);
+      _config->Set("APT::Architecture", nativeArch);
+      if (Success == false)
+      {
+	 _error->Error(_("Unable to get build-dependency information for %s"), Src);
+	 return {};
+      }
+   }
+   else if (Last->BuildDepends(BuildDeps, _config->FindB("APT::Get::Arch-Only", false), false) == false)
+   {
+      _error->Error(_("Unable to get build-dependency information for %s"), Src);
+      return {};
+   }
+
+   if (BuildDeps.empty() == true)
+      ioprintf(c1out,_("%s has no build depends.\n"), Src);
+
+   return BuildDeps;
+}
+static void WriteBuildDependencyPackage(std::ostringstream &buildDepsPkgFile,
+      std::string const &PkgName, std::string const &Arch,
+      std::vector<pkgSrcRecords::Parser::BuildDepRec> const &Dependencies)
+{
+   buildDepsPkgFile << "Package: " << PkgName << "\n"
+      << "Architecture: " << Arch << "\n"
+      << "Version: 1\n";
+
+   bool const IndepOnly = _config->FindB("APT::Get::Indep-Only", false);
+   std::string depends, conflicts;
+   for (auto const &dep: Dependencies)
+   {
+      // ArchOnly is handled while parsing the dependencies on input
+      if (IndepOnly && (dep.Type == pkgSrcRecords::Parser::BuildDependArch ||
+	       dep.Type == pkgSrcRecords::Parser::BuildConflictArch))
+	 continue;
+      std::string * type;
+      if (dep.Type == pkgSrcRecords::Parser::BuildConflict ||
+		  dep.Type == pkgSrcRecords::Parser::BuildConflictIndep ||
+		  dep.Type == pkgSrcRecords::Parser::BuildConflictArch)
+	 type = &conflicts;
+      else
+	 type = &depends;
+
+      type->append(" ").append(dep.Package);
+      if (dep.Version.empty() ==  false)
+	 type->append(" (").append(pkgCache::CompTypeDeb(dep.Op)).append(" ").append(dep.Version).append(")");
+      if ((dep.Op & pkgCache::Dep::Or) == pkgCache::Dep::Or)
+      {
+	 type->append("\n  |");
+      }
+      else
+	 type->append(",\n");
+   }
+   if (depends.empty() == false)
+      buildDepsPkgFile << "Depends:\n" << depends;
+   if (conflicts.empty() == false)
+      buildDepsPkgFile << "Conflicts:\n" << conflicts;
+   buildDepsPkgFile << "\n";
+}
+bool DoBuildDep(CommandLine &CmdL)
+{
+   std::string hostArch = _config->Find("APT::Get::Host-Architecture");
+   if (not hostArch.empty())
+   {
+      if (not APT::Configuration::checkArchitecture(hostArch))
+      {
+	 auto const veryforeign = _config->FindVector("APT::BarbarianArchitectures");
+	 if (std::find(veryforeign.begin(), veryforeign.end(), hostArch) == veryforeign.end())
+	    _error->Warning(_("No architecture information available for %s. See apt.conf(5) APT::Architectures for setup"), hostArch.c_str());
+      }
+   }
+   auto const nativeArch = _config->Find("APT::Architecture");
+   std::string const pseudoArch = hostArch.empty() ? nativeArch : hostArch;
+
+   CacheFile Cache;
+   Cache.InhibitActionGroups(true);
+   auto VolatileCmdL = GetPseudoPackages(Cache.GetSourceList(), CmdL, AddVolatileSourceFile, pseudoArch);
+   auto AreDoingSatisfy = strcasecmp(CmdL.FileList[0], "satisfy") == 0;
+
+   if (not AreDoingSatisfy)
+      _config->Set("APT::Install-Recommends", false);
+
+   if (CmdL.FileSize() <= 1 && VolatileCmdL.empty())
+      return _error->Error(_("Must specify at least one package to check builddeps for"));
+
+   std::ostringstream buildDepsPkgFile;
+   std::vector<PseudoPkg> pseudoPkgs;
+   // deal with the build essentials first
+   if (not AreDoingSatisfy)
+   {
+      std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
+      for (auto && opt: _config->FindVector("APT::Build-Essential"))
+      {
+	 if (opt.empty())
+	    continue;
+	 pkgSrcRecords::Parser::BuildDepRec rec;
+	 rec.Package = std::move(opt);
+	 rec.Type = pkgSrcRecords::Parser::BuildDependIndep;
+	 rec.Op = 0;
+	 BuildDeps.push_back(rec);
+      }
+      std::string const pseudo = "builddeps:essentials";
+      WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, nativeArch, BuildDeps);
+      pseudoPkgs.emplace_back(pseudo, nativeArch, "");
+   }
+
+   if (AreDoingSatisfy)
+   {
+      std::vector<pkgSrcRecords::Parser::BuildDepRec> BuildDeps;
+      for (unsigned i = 1; i < CmdL.FileSize(); i++)
+      {
+	 const char *Start = CmdL.FileList[i];
+	 const char *Stop = Start + strlen(Start);
+	 auto Type = pkgSrcRecords::Parser::BuildDependIndep;
+
+	 // Reject '>' and '<' as operators, as they have strange meanings.
+	 bool insideVersionRestriction = false;
+	 for (auto C = Start; C + 1 < Stop; C++)
+	 {
+	    if (*C == '(')
+	       insideVersionRestriction = true;
+	    else if (*C == ')')
+	       insideVersionRestriction = false;
+	    else if (insideVersionRestriction && (*C == '<' || *C == '>'))
+	    {
+	       if (C[1] != *C && C[1] != '=')
+		  return _error->Error(_("Invalid operator '%c' at offset %d, did you mean '%c%c' or '%c='? - in: %s"), *C, (int)(C - Start), *C, *C, *C, Start);
+	       C++;
+	    }
+	 }
+
+	 if (APT::String::Startswith(Start, "Conflicts:"))
+	 {
+	    Type = pkgSrcRecords::Parser::BuildConflictIndep;
+	    Start += strlen("Conflicts:");
+	 }
+	 while (1)
+	 {
+	    pkgSrcRecords::Parser::BuildDepRec rec;
+	    Start = debListParser::ParseDepends(Start, Stop,
+						rec.Package, rec.Version, rec.Op, true, false, true, pseudoArch);
+
+	    if (Start == 0)
+	       return _error->Error("Problem parsing dependency: %s", CmdL.FileList[i]);
+	    rec.Type = Type;
+
+	    // We parsed a package that was ignored (wrong architecture restriction
+	    // or something).
+	    if (rec.Package.empty())
+	    {
+	       // If we are in an OR group, we need to set the "Or" flag of the
+	       // previous entry to our value.
+	       if (BuildDeps.empty() == false && (BuildDeps[BuildDeps.size() - 1].Op & pkgCache::Dep::Or) == pkgCache::Dep::Or)
+	       {
+		  BuildDeps[BuildDeps.size() - 1].Op &= ~pkgCache::Dep::Or;
+		  BuildDeps[BuildDeps.size() - 1].Op |= (rec.Op & pkgCache::Dep::Or);
+	       }
+	    }
+	    else
+	    {
+	       BuildDeps.emplace_back(std::move(rec));
+	    }
+
+	    if (Start == Stop)
+	       break;
+	 }
+      }
+      std::string const pseudo = "satisfy:command-line";
+      WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch, BuildDeps);
+      pseudoPkgs.emplace_back(pseudo, pseudoArch, "");
+   }
+
+   // Read the source list
+   if (Cache.BuildSourceList() == false)
+      return false;
+   pkgSourceList *List = Cache.GetSourceList();
+
+   if (not AreDoingSatisfy)
+   {
+      auto const VolatileSources = List->GetVolatileFiles();
+      for (auto &&pkg : VolatileCmdL)
+      {
+	 if (unlikely(pkg.index == -1))
+	 {
+	    _error->Error(_("Unable to find a source package for %s"), pkg.name.c_str());
+	    continue;
+	 }
+	 if (DirectoryExists(pkg.name))
+	    ioprintf(c1out, _("Note, using directory '%s' to get the build dependencies\n"), pkg.name.c_str());
+	 else
+	    ioprintf(c1out, _("Note, using file '%s' to get the build dependencies\n"), pkg.name.c_str());
+	 std::unique_ptr<pkgSrcRecords::Parser> Last(VolatileSources[pkg.index]->CreateSrcParser());
+	 if (Last == nullptr)
+	 {
+	    _error->Error(_("Unable to find a source package for %s"), pkg.name.c_str());
+	    continue;
+	 }
+
+	 auto pseudo = std::string("builddeps:") + pkg.name;
+	 WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch,
+				     GetBuildDeps(Last.get(), pkg.name.c_str(), hostArch));
+	 pkg.name = std::move(pseudo);
+	 pseudoPkgs.push_back(std::move(pkg));
+      }
+      VolatileCmdL.clear();
+   }
+
+   bool const WantLock = _config->FindB("APT::Get::Print-URIs", false) == false;
+   if (CmdL.FileList[1] != 0 && not AreDoingSatisfy)
+   {
+      if (Cache.BuildCaches(WantLock) == false)
+	 return false;
+      // Create the text record parsers
+      pkgSrcRecords SrcRecs(*List);
+      if (_error->PendingError() == true)
+	 return false;
+      for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
+      {
+	 std::string Src;
+	 pkgSrcRecords::Parser * const Last = FindSrc(*I,SrcRecs,Src,Cache);
+	 if (Last == nullptr)
+	    return _error->Error(_("Unable to find a source package for %s"), *I);
+
+	 std::string const pseudo = std::string("builddeps:") + Src;
+	 WriteBuildDependencyPackage(buildDepsPkgFile, pseudo, pseudoArch,
+	       GetBuildDeps(Last, Src.c_str(), hostArch));
+	 std::string reltag = *I;
+	 size_t found = reltag.find_last_of("/");
+	 if (found == std::string::npos)
+	    reltag.clear();
+	 else
+	    reltag.erase(0, found + 1);
+	 pseudoPkgs.emplace_back(pseudo, pseudoArch, std::move(reltag));
+      }
+   }
+
+   Cache.AddIndexFile(new debStringPackageIndex(buildDepsPkgFile.str()));
+
+   if (Cache.Open(WantLock) == false)
+      return false;
+   pkgProblemResolver Fix(Cache.GetDepCache());
+
+   APT::PackageSet UpgradablePackages;
+   APT::PackageVector removeAgain;
+   {
+      TryToInstall InstallAction(Cache, &Fix, false);
+      std::list<std::pair<pkgCache::VerIterator, std::string>> candSwitch;
+      for (auto const &pkg: pseudoPkgs)
+      {
+	 pkgCache::PkgIterator const Pkg = Cache->FindPkg(pkg.name, pkg.arch);
+	 if (Pkg.end())
+	    continue;
+	 if (pkg.release.empty())
+	    Cache->SetCandidateVersion(Pkg.VersionList());
+	 else
+	    candSwitch.emplace_back(Pkg.VersionList(), pkg.release);
+      }
+      if (candSwitch.empty() == false)
+	 InstallAction.propagateReleaseCandidateSwitching(candSwitch, c0out);
+      for (auto const &pkg: pseudoPkgs)
+      {
+	 pkgCache::PkgIterator const Pkg = Cache->FindPkg(pkg.name, pkg.arch);
+	 if (Pkg.end())
+	    continue;
+	 InstallAction(Cache[Pkg].CandidateVerIter(Cache));
+	 removeAgain.push_back(Pkg);
+      }
+
+      {
+	 APT::CacheSetHelper helper;
+	 helper.PackageFrom(APT::CacheSetHelper::PATTERN, &UpgradablePackages, Cache, "?upgradable");
+      }
+      InstallAction.doAutoInstall();
+
+      OpTextProgress Progress(*_config);
+      bool const resolver_fail = Fix.Resolve(true, &Progress);
+      if (resolver_fail == false && Cache->BrokenCount() == 0)
+	 return false;
+      if (CheckNothingBroken(Cache) == false)
+	 return false;
+   }
+   if (DoAutomaticRemove(Cache) == false)
+      return false;
+
+   {
+      if (_config->FindB(AreDoingSatisfy ? "APT::Get::Satisfy-Automatic" : "APT::Get::Build-Dep-Automatic", false) == false)
+      {
+	 for (auto const &pkg: removeAgain)
+	 {
+	    auto const instVer = Cache[pkg].InstVerIter(Cache);
+	    if (unlikely(instVer.end() == true))
+	       continue;
+	    for (auto D = instVer.DependsList(); D.end() != true; ++D)
+	    {
+	       if (D->Type != pkgCache::Dep::Depends || D.IsMultiArchImplicit())
+		  continue;
+	       APT::VersionList verlist = APT::VersionList::FromDependency(Cache, D, APT::CacheSetHelper::CANDIDATE);
+	       for (auto const &V : verlist)
+	       {
+		  auto const P = V.ParentPkg();
+		  if (Cache[P].InstallVer != V)
+		     continue;
+		  Cache->MarkAuto(P, false);
+	       }
+	    }
+	 }
+      }
+      for (auto const &pkg: removeAgain)
+	 Cache->MarkDelete(pkg, false, 0, true);
+   }
+
+   APT::PackageVector HeldBackPackages;
+   SortedPackageUniverse Universe(Cache);
+   for (auto const &Pkg: Universe)
+      if (Pkg->CurrentVer != 0 && not Cache[Pkg].Upgrade() && not Cache[Pkg].Delete() &&
+	  UpgradablePackages.find(Pkg) != UpgradablePackages.end())
+	 HeldBackPackages.push_back(Pkg);
+
+   pseudoPkgs.clear();
+   if (_error->PendingError() || not InstallPackages(Cache, HeldBackPackages, false, true))
+      return _error->Error(_("Failed to process build dependencies"));
+   return true;
+}
+									/*}}}*/
diff --git a/apt-private/private-source.h b/apt-private/private-source.h
new file mode 100644
index 0000000..d00c53e
--- /dev/null
+++ b/apt-private/private-source.h
@@ -0,0 +1,11 @@
+#ifndef APT_PRIVATE_SOURCE_H
+#define APT_PRIVATE_SOURCE_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool DoSource(CommandLine &CmdL);
+APT_PUBLIC bool DoBuildDep(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-sources.cc b/apt-private/private-sources.cc
new file mode 100644
index 0000000..a7d003f
--- /dev/null
+++ b/apt-private/private-sources.cc
@@ -0,0 +1,105 @@
+#include <config.h>
+
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-output.h>
+#include <apt-private/private-sources.h>
+#include <apt-private/private-utils.h>
+
+#include <cstddef>
+#include <iostream>
+#include <string>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <apti18n.h>
+
+/* Interface discussion with donkult (for the future):
+  apt [add-{archive,release,component}|edit|change-release|disable]-sources
+ and be clever and work out stuff from the Release file
+*/
+
+// EditSource - EditSourcesList						/*{{{*/
+class APT_HIDDEN ScopedGetLock {
+public:
+   int fd;
+   explicit ScopedGetLock(std::string const &filename) : fd(GetLock(filename)) {}
+   ~ScopedGetLock() { close(fd); }
+};
+bool EditSources(CommandLine &CmdL)
+{
+   std::string sourceslist;
+   if (CmdL.FileList[1] != NULL)
+   {
+      sourceslist = _config->FindDir("Dir::Etc::sourceparts") + CmdL.FileList[1];
+      if (!APT::String::Endswith(sourceslist, ".list"))
+         sourceslist += ".list";
+   } else {
+      sourceslist = _config->FindFile("Dir::Etc::sourcelist");
+   }
+   HashString before;
+   if (FileExists(sourceslist))
+       before.FromFile(sourceslist);
+   else
+   {
+      FileFd filefd;
+      if (filefd.Open(sourceslist, FileFd::Create | FileFd::WriteOnly, FileFd::None, 0644) == false)
+	 return false;
+   }
+
+   ScopedGetLock lock(sourceslist);
+   if (lock.fd < 0)
+      return false;
+
+   bool res;
+   bool file_changed = false;
+   do {
+      if (EditFileInSensibleEditor(sourceslist) == false)
+	 return false;
+      if (before.empty())
+      {
+	 struct stat St;
+	 if (stat(sourceslist.c_str(), &St) == 0 && St.st_size == 0)
+	       RemoveFile("edit-sources", sourceslist);
+      }
+      else if (FileExists(sourceslist) && !before.VerifyFile(sourceslist))
+      {
+	 file_changed = true;
+	 pkgCacheFile::RemoveCaches();
+      }
+      pkgCacheFile CacheFile;
+      res = CacheFile.BuildCaches(nullptr);
+      if (res == false || _error->empty(GlobalError::WARNING) == false) {
+	 std::string outs;
+	 strprintf(outs, _("Failed to parse %s. Edit again? "), sourceslist.c_str());
+         // FIXME: should we add a "restore previous" option here?
+         if (YnPrompt(outs.c_str(), true) == false)
+	 {
+	    if (res == false && _error->PendingError() == false)
+	    {
+	       CacheFile.Close();
+	       pkgCacheFile::RemoveCaches();
+	       res = CacheFile.BuildCaches(nullptr);
+	    }
+	    break;
+	 }
+      }
+   } while (res == false);
+
+   if (res == true && file_changed == true)
+   {
+      ioprintf(
+         std::cout, _("Your '%s' file changed, please run 'apt-get update'.\n"),
+         sourceslist.c_str());
+   }
+   return res;
+}
+									/*}}}*/
diff --git a/apt-private/private-sources.h b/apt-private/private-sources.h
new file mode 100644
index 0000000..0c42190
--- /dev/null
+++ b/apt-private/private-sources.h
@@ -0,0 +1,10 @@
+#ifndef APT_PRIVATE_SOURCES_H
+#define APT_PRIVATE_SOURCES_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool EditSources(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-unmet.cc b/apt-private/private-unmet.cc
new file mode 100644
index 0000000..229e5a2
--- /dev/null
+++ b/apt-private/private-unmet.cc
@@ -0,0 +1,120 @@
+// -*- mode: cpp; mode: fold -*-
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-private/private-cacheset.h>
+#include <apt-private/private-unmet.h>
+
+#include <cstddef>
+
+#include <iostream>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// UnMet - Show unmet dependencies					/*{{{*/
+static bool ShowUnMet(pkgCache::VerIterator const &V, bool const Important)
+{
+	 bool Header = false;
+	 for (pkgCache::DepIterator D = V.DependsList(); D.end() == false;)
+	 {
+	    // Collect or groups
+	    pkgCache::DepIterator Start;
+	    pkgCache::DepIterator End;
+	    D.GlobOr(Start,End);
+
+	    // Important deps only
+	    if (Important == true)
+	       if (End->Type != pkgCache::Dep::PreDepends &&
+	           End->Type != pkgCache::Dep::Depends)
+		  continue;
+
+	    // Skip conflicts and replaces
+	    if (End.IsNegative() == true || End->Type == pkgCache::Dep::Replaces)
+	       continue;
+
+	    // Verify the or group
+	    bool OK = false;
+	    pkgCache::DepIterator RealStart = Start;
+	    do
+	    {
+	       // See if this dep is Ok
+	       pkgCache::Version **VList = Start.AllTargets();
+	       if (*VList != 0)
+	       {
+		  OK = true;
+		  delete [] VList;
+		  break;
+	       }
+	       delete [] VList;
+
+	       if (Start == End)
+		  break;
+	       ++Start;
+	    }
+	    while (1);
+
+	    // The group is OK
+	    if (OK == true)
+	       continue;
+
+	    // Oops, it failed..
+	    if (Header == false)
+	       ioprintf(std::cout,_("Package %s version %s has an unmet dep:\n"),
+			V.ParentPkg().FullName(true).c_str(),V.VerStr());
+	    Header = true;
+
+	    // Print out the dep type
+	    std::cout << " " << End.DepType() << ": ";
+
+	    // Show the group
+	    Start = RealStart;
+	    do
+	    {
+	       std::cout << Start.TargetPkg().FullName(true);
+	       if (Start.TargetVer() != 0)
+		  std::cout << " (" << Start.CompType() << " " << Start.TargetVer() <<
+		  ")";
+	       if (Start == End)
+		  break;
+	       std::cout << " | ";
+	       ++Start;
+	    }
+	    while (1);
+
+	    std::cout << std::endl;
+	 }
+   return true;
+}
+bool UnMet(CommandLine &CmdL)
+{
+   bool const Important = _config->FindB("APT::Cache::Important",false);
+
+   pkgCacheFile CacheFile;
+   if (unlikely(CacheFile.GetPkgCache() == NULL))
+      return false;
+
+   if (CmdL.FileSize() <= 1)
+   {
+      for (pkgCache::PkgIterator P = CacheFile.GetPkgCache()->PkgBegin(); P.end() == false; ++P)
+	 for (pkgCache::VerIterator V = P.VersionList(); V.end() == false; ++V)
+	    if (ShowUnMet(V, Important) == false)
+	       return false;
+   }
+   else
+   {
+      CacheSetHelperVirtuals helper(true, GlobalError::NOTICE);
+      APT::VersionList verset = APT::VersionList::FromCommandLine(CacheFile, CmdL.FileList + 1,
+				APT::CacheSetHelper::CANDIDATE, helper);
+      for (APT::VersionList::iterator V = verset.begin(); V != verset.end(); ++V)
+	 if (ShowUnMet(V, Important) == false)
+	    return false;
+   }
+   return true;
+}
+									/*}}}*/
diff --git a/apt-private/private-unmet.h b/apt-private/private-unmet.h
new file mode 100644
index 0000000..31c2c17
--- /dev/null
+++ b/apt-private/private-unmet.h
@@ -0,0 +1,10 @@
+#ifndef APT_PRIVATE_UNMET_H
+#define APT_PRIVATE_UNMET_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool UnMet(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-update.cc b/apt-private/private-update.cc
new file mode 100644
index 0000000..cc0753c
--- /dev/null
+++ b/apt-private/private-update.cc
@@ -0,0 +1,276 @@
+// Include files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/cachefile.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/metaindex.h>
+#include <apt-pkg/sourcelist.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/update.h>
+
+#include <apt-private/acqprogress.h>
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-download.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-update.h>
+
+#include <ostream>
+#include <string>
+#include <tuple>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// DoUpdate - Update the package lists					/*{{{*/
+static bool isDebianBookwormRelease(pkgCache::RlsFileIterator const &RlsFile)
+{
+   std::tuple<std::string_view, std::string_view, std::string_view> const affected[] = {
+      {"Debian", "Debian", "bookworm"},
+      {"Debian", "Debian", "sid"},
+   };
+   if (RlsFile.end() || RlsFile->Origin == nullptr || RlsFile->Label == nullptr || RlsFile->Codename == nullptr)
+      return false;
+   std::tuple<std::string_view, std::string_view, std::string_view> const release{RlsFile.Origin(), RlsFile.Label(), RlsFile.Codename()};
+   return std::find(std::begin(affected), std::end(affected), release) != std::end(affected);
+}
+static void suggestDebianNonFreeFirmware(char const *const repo, char const *const val,
+					 char const *const from, char const *const to)
+{
+   // Both messages are reused from the ReleaseInfoChange feature in acquire-item.cc
+   _error->Notice(_("Repository '%s' changed its '%s' value from '%s' to '%s'"), repo, val, from, to);
+   std::string notes;
+   strprintf(notes, "https://www.debian.org/releases/bookworm/%s/release-notes/ch-information.html#non-free-split", _config->Find("APT::Architecture").c_str());
+   _error->Notice(_("More information about this can be found online in the Release notes at: %s"), notes.c_str());
+}
+bool DoUpdate(CommandLine &CmdL)
+{
+   if (CmdL.FileSize() != 1)
+      return _error->Error(_("The update command takes no arguments"));
+   return DoUpdate();
+}
+
+bool DoUpdate()
+{
+   CacheFile Cache;
+
+   // Get the source list
+   if (Cache.BuildSourceList() == false)
+      return false;
+   pkgSourceList *List = Cache.GetSourceList();
+
+   // Just print out the uris an exit if the --print-uris flag was used
+   if (_config->FindB("APT::Get::Print-URIs") == true)
+   {
+      // force a hashsum for compatibility reasons
+      _config->CndSet("Acquire::ForceHash", "md5sum");
+
+      // Populate it with the source selection and get all Indexes
+      // (GetAll=true)
+      aptAcquireWithTextStatus Fetcher;
+      if (List->GetIndexes(&Fetcher,true) == false)
+	 return false;
+
+      std::string compExt = APT::Configuration::getCompressionTypes()[0];
+      pkgAcquire::UriIterator I = Fetcher.UriBegin();
+      for (; I != Fetcher.UriEnd(); ++I)
+      {
+         std::string FileName = flNotDir(I->Owner->DestFile);
+         if(compExt.empty() == false && 
+            APT::String::Endswith(FileName, compExt))
+            FileName = FileName.substr(0, FileName.size() - compExt.size() - 1);
+	 c1out << '\'' << I->URI << "' " << FileName << ' ' <<
+	    std::to_string(I->Owner->FileSize) << ' ' << I->Owner->HashSum() << std::endl;
+      }
+      return true;
+   }
+
+   // do the work
+   if (_config->FindB("APT::Get::Download",true) == true)
+   {
+      AcqTextStatus Stat(std::cout, ScreenWidth,_config->FindI("quiet",0));
+      ListUpdate(Stat, *List);
+   }
+
+   if (_config->FindB("pkgCacheFile::Generate", true) == false)
+      return true;
+
+   // Rebuild the cache.
+   pkgCacheFile::RemoveCaches();
+   if (Cache.BuildCaches(false) == false)
+      return false;
+
+   bool const SLWarnings = _config->FindB("APT::Get::Update::SourceListWarnings", true);
+   if (SLWarnings)
+      List = Cache.GetSourceList();
+
+   if (_config->FindB("APT::Get::Update::SourceListWarnings::APTAuth", SLWarnings))
+   {
+      constexpr std::string_view const affected_method[] = {"http", "https", "tor+http", "tor+https", "ftp"};
+      for (auto *S : *List)
+      {
+	 URI uri(S->GetURI());
+	 if (uri.User.empty() && uri.Password.empty())
+	    continue;
+	 // we can't really predict if a +http method supports everything http does,
+	 // so we play it safe and use an allowlist here.
+	 if (std::find(std::begin(affected_method), std::end(affected_method), uri.Access) != std::end(affected_method))
+	    // TRANSLATOR: the first two are manpage references, the last the URI from a sources.list
+	    _error->Notice(_("Usage of %s should be preferred over embedding login information directly in the %s entry for '%s'"),
+			   "apt_auth.conf(5)", "sources.list(5)", URI::ArchiveOnly(uri).c_str());
+      }
+   }
+
+   if (_config->FindB("APT::Get::Update::SourceListWarnings::NonFreeFirmware", SLWarnings))
+   {
+      // If a Debian source has a non-free component, suggest adding non-free-firmware
+      bool found_affected_release = false;
+      bool found_non_free = false;
+      bool found_non_free_firmware = false;
+      for (auto *S : *List)
+      {
+	 if (not isDebianBookwormRelease(S->FindInCache(Cache, false)))
+	    continue;
+
+	 for (auto PkgFile = Cache.GetPkgCache()->FileBegin(); not PkgFile.end(); ++PkgFile)
+	 {
+	    if (PkgFile.Flagged(pkgCache::Flag::NoPackages))
+	       continue;
+	    found_affected_release = true;
+	    const auto * const comp = PkgFile.Component();
+	    if (comp == nullptr)
+	      continue;
+	    if (strcmp(comp, "non-free") == 0)
+	       found_non_free = true;
+	    else if (strcmp(comp, "non-free-firmware") == 0)
+	    {
+	       found_non_free_firmware = true;
+	       break;
+	    }
+	 }
+	 if (found_non_free_firmware)
+	    break;
+      }
+      if (not found_non_free_firmware && found_non_free && found_affected_release)
+      {
+	 /* See if a well-known firmware package is installable from this codename
+	    if so, we likely operate with new apt on an old snapshot not supporting non-free-firmware */
+	 bool suggest_non_free_firmware = true;
+	 if (auto const Grp = Cache.GetPkgCache()->FindGrp("firmware-linux-nonfree"); not Grp.end())
+	 {
+	    for (auto Pkg = Grp.PackageList(); not Pkg.end() && suggest_non_free_firmware; Pkg = Grp.NextPkg(Pkg))
+	    {
+	       for (auto Ver = Pkg.VersionList(); not Ver.end(); ++Ver)
+	       {
+		  if (not Ver.Downloadable())
+		     continue;
+		  for (auto VerFile = Ver.FileList(); not VerFile.end(); ++VerFile)
+		  {
+		     auto const PkgFile = VerFile.File();
+		     if (PkgFile.end())
+			continue;
+		     if (not isDebianBookwormRelease(PkgFile.ReleaseFile()))
+			continue;
+		     suggest_non_free_firmware = false;
+		     break;
+		  }
+		  if (not suggest_non_free_firmware)
+		     break;
+	       }
+	    }
+	 }
+	 if (suggest_non_free_firmware)
+	    suggestDebianNonFreeFirmware("Debian bookworm", "non-free component", "non-free", "non-free non-free-firmware");
+      }
+
+      if (not found_non_free_firmware && not found_non_free && found_affected_release)
+      {
+	 /* Try to notify users who have installed firmware packages at some point, but
+	    have not enabled non-free currently – they might want to opt into updates now */
+	 APT::StringView const affected_pkgs[] = {
+	    "amd64-microcode", "atmel-firmware", "bluez-firmware", "dahdi-firmware-nonfree",
+	    "firmware-amd-graphics", "firmware-ast", "firmware-atheros", "firmware-bnx2",
+	    "firmware-bnx2x", "firmware-brcm80211", "firmware-cavium", "firmware-intel-sound",
+	    "firmware-intelwimax", "firmware-ipw2x00", "firmware-ivtv", "firmware-iwlwifi",
+	    "firmware-libertas", "firmware-linux", "firmware-linux-nonfree", "firmware-misc-nonfree",
+	    "firmware-myricom", "firmware-netronome", "firmware-netxen", "firmware-qcom-media",
+	    "firmware-qcom-soc", "firmware-qlogic", "firmware-realtek", "firmware-realtek-rtl8723cs-bt",
+	    "firmware-samsung", "firmware-siano", "firmware-sof-signed", "firmware-ti-connectivity",
+	    "firmware-zd1211", "intel-microcode", "midisport-firmware", "raspi-firmware",
+	 };
+	 bool suggest_non_free_firmware = false;
+	 for (auto pkgname : affected_pkgs)
+	 {
+	    auto const Grp = Cache.GetPkgCache()->FindGrp(pkgname);
+	    if (Grp.end())
+	       continue;
+	    for (auto Pkg = Grp.PackageList(); not Pkg.end(); Pkg = Grp.NextPkg(Pkg))
+	    {
+	       auto const Ver = Pkg.CurrentVer();
+	       if (Ver.end() || Ver.Downloadable())
+		  continue;
+	       bool another = false;
+	       for (auto V = Pkg.VersionList(); not V.end(); ++V)
+		  if (V.Downloadable())
+		  {
+		     another = true;
+		     break;
+		  }
+	       if (another)
+		  continue;
+	       suggest_non_free_firmware = true;
+	       break;
+	    }
+	    if (suggest_non_free_firmware)
+	       break;
+	 }
+	 if (suggest_non_free_firmware)
+	    suggestDebianNonFreeFirmware("Debian bookworm", "firmware component", "non-free", "non-free-firmware");
+      }
+   }
+
+   if (_config->FindB("APT::Get::Update::SourceListWarnings::SignedBy", SLWarnings))
+   {
+      for (auto *S : *List)
+      {
+	 if (not S->HasFlag(metaIndex::Flag::DEB822) || not S->GetSignedBy().empty())
+	    continue;
+
+	 URI uri(S->GetURI());
+	 // TRANSLATOR: the first is manpage reference, the last the URI from a sources.list
+	 _error->Notice(_("Missing Signed-By in the %s entry for '%s'"),
+			"sources.list(5)", URI::ArchiveOnly(uri).c_str());
+      }
+   }
+
+   // show basic stats (if the user whishes)
+   if (_config->FindB("APT::Cmd::Show-Update-Stats", false) == true)
+   {
+      int upgradable = 0;
+      if (Cache.Open(false) == false)
+         return false;
+      for (pkgCache::PkgIterator I = Cache->PkgBegin(); I.end() != true; ++I)
+      {
+         pkgDepCache::StateCache &state = Cache[I];
+         if (I->CurrentVer != 0 && state.Upgradable() && state.CandidateVer != NULL)
+            upgradable++;
+      }
+      const char *msg = P_(
+         "%i package can be upgraded. Run 'apt list --upgradable' to see it.\n",
+         "%i packages can be upgraded. Run 'apt list --upgradable' to see them.\n",
+         upgradable);
+      if (upgradable == 0)
+         c1out << _("All packages are up to date.") << std::endl;
+      else
+         ioprintf(c1out, msg, upgradable);
+
+      RunScripts("APT::Update::Post-Invoke-Stats");
+   }
+
+   return true;
+}
+									/*}}}*/
diff --git a/apt-private/private-update.h b/apt-private/private-update.h
new file mode 100644
index 0000000..8ca706c
--- /dev/null
+++ b/apt-private/private-update.h
@@ -0,0 +1,11 @@
+#ifndef APT_PRIVATE_UPDATE_H
+#define APT_PRIVATE_UPDATE_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool DoUpdate(CommandLine &CmdL);
+APT_PUBLIC bool DoUpdate();
+
+#endif
diff --git a/apt-private/private-upgrade.cc b/apt-private/private-upgrade.cc
new file mode 100644
index 0000000..143879f
--- /dev/null
+++ b/apt-private/private-upgrade.cc
@@ -0,0 +1,82 @@
+// Includes								/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/cacheset.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/upgrade.h>
+
+#include <apt-private/private-cachefile.h>
+#include <apt-private/private-install.h>
+#include <apt-private/private-json-hooks.h>
+#include <apt-private/private-output.h>
+#include <apt-private/private-update.h>
+#include <apt-private/private-upgrade.h>
+
+#include <iostream>
+
+#include <apti18n.h>
+									/*}}}*/
+
+// this is actually performing the various upgrade operations 
+static bool UpgradeHelper(CommandLine &CmdL, int UpgradeFlags)
+{
+   if (_config->FindB("APT::Update") && not DoUpdate())
+      return false;
+
+   CacheFile Cache;
+   auto VolatileCmdL = GetPseudoPackages(Cache.GetSourceList(), CmdL, AddVolatileBinaryFile, "");
+
+   if (Cache.OpenForInstall() == false || Cache.CheckDeps() == false)
+      return false;
+
+   std::map<unsigned short, APT::VersionVector> verset;
+   std::set<std::string> UnknownPackages;
+   APT::PackageVector HeldBackPackages;
+   if (not DoCacheManipulationFromCommandLine(CmdL, VolatileCmdL, Cache, verset, UpgradeFlags, UnknownPackages, HeldBackPackages))
+   {
+      RunJsonHook("AptCli::Hooks::Upgrade", "org.debian.apt.hooks.install.fail", CmdL.FileList, Cache, UnknownPackages);
+      return false;
+   }
+   RunJsonHook("AptCli::Hooks::Upgrade", "org.debian.apt.hooks.install.pre-prompt", CmdL.FileList, Cache);
+   if (InstallPackages(Cache, HeldBackPackages, true, true, true, "AptCli::Hooks::Upgrade", CmdL))
+      return RunJsonHook("AptCli::Hooks::Upgrade", "org.debian.apt.hooks.install.post", CmdL.FileList, Cache);
+   else
+      return RunJsonHook("AptCli::Hooks::Upgrade", "org.debian.apt.hooks.install.fail", CmdL.FileList, Cache);
+}
+
+// DoDistUpgrade - Automatic smart upgrader				/*{{{*/
+// ---------------------------------------------------------------------
+/* Intelligent upgrader that will install and remove packages at will */
+bool DoDistUpgrade(CommandLine &CmdL)
+{
+   return UpgradeHelper(CmdL, APT::Upgrade::ALLOW_EVERYTHING);
+}
+									/*}}}*/
+bool DoUpgrade(CommandLine &CmdL)					/*{{{*/
+{
+   if (_config->FindB("APT::Get::Upgrade-Allow-New", false) == true)
+      return DoUpgradeWithAllowNewPackages(CmdL);
+   else
+      return DoUpgradeNoNewPackages(CmdL);
+}
+									/*}}}*/
+// DoUpgradeNoNewPackages - Upgrade all packages			/*{{{*/
+// ---------------------------------------------------------------------
+/* Upgrade all packages without installing new packages or erasing old
+   packages */
+bool DoUpgradeNoNewPackages(CommandLine &CmdL)
+{
+   // Do the upgrade
+   return UpgradeHelper(CmdL, 
+                        APT::Upgrade::FORBID_REMOVE_PACKAGES|
+                        APT::Upgrade::FORBID_INSTALL_NEW_PACKAGES);
+}
+									/*}}}*/
+// DoSafeUpgrade - Upgrade all packages with install but not remove	/*{{{*/
+bool DoUpgradeWithAllowNewPackages(CommandLine &CmdL)
+{
+   return UpgradeHelper(CmdL, APT::Upgrade::FORBID_REMOVE_PACKAGES);
+}
+									/*}}}*/
diff --git a/apt-private/private-upgrade.h b/apt-private/private-upgrade.h
new file mode 100644
index 0000000..16bb93c
--- /dev/null
+++ b/apt-private/private-upgrade.h
@@ -0,0 +1,13 @@
+#ifndef APTPRIVATE_PRIVATE_UPGRADE_H
+#define APTPRIVATE_PRIVATE_UPGRADE_H
+
+#include <apt-pkg/macros.h>
+
+class CommandLine;
+
+APT_PUBLIC bool DoDistUpgrade(CommandLine &CmdL);
+APT_PUBLIC bool DoUpgrade(CommandLine &CmdL);
+bool DoUpgradeNoNewPackages(CommandLine &CmdL);
+bool DoUpgradeWithAllowNewPackages(CommandLine &CmdL);
+
+#endif
diff --git a/apt-private/private-utils.cc b/apt-private/private-utils.cc
new file mode 100644
index 0000000..5863925
--- /dev/null
+++ b/apt-private/private-utils.cc
@@ -0,0 +1,98 @@
+#include <config.h>
+
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+
+#include <apt-private/private-utils.h>
+
+#include <cstdlib>
+#include <sstream>
+#include <unistd.h>
+
+// DisplayFileInPager - Display File with pager				/*{{{*/
+bool DisplayFileInPager(std::string const &filename)
+{
+   pid_t Process = ExecFork();
+   if (Process == 0)
+   {
+      const char *Args[3];
+      Args[1] = filename.c_str();
+      Args[2] = NULL;
+      if (isatty(STDOUT_FILENO) == 1)
+      {
+	 // likely installed, provided by sensible-utils
+	 std::string const pager = _config->Find("Dir::Bin::Pager",
+	       "sensible-pager");
+	 Args[0] = pager.c_str();
+	 execvp(Args[0],(char **)Args);
+	 // lets try some obvious alternatives
+	 Args[0] = getenv("PAGER");
+	 if (Args[0] != NULL)
+	    execvp(Args[0],(char **)Args);
+
+	 Args[0] = "pager";
+	 execvp(Args[0],(char **)Args);
+      }
+      // we could read the file ourselves, but… meh
+      Args[0] = "cat";
+      execvp(Args[0],(char **)Args);
+      exit(100);
+   }
+
+   // Wait for the subprocess
+   return ExecWait(Process, "pager", false);
+}
+									/*}}}*/
+// EditFileInSensibleEditor - Edit File with editor			/*{{{*/
+bool EditFileInSensibleEditor(std::string const &filename)
+{
+   pid_t Process = ExecFork();
+   if (Process == 0)
+   {
+      // likely installed, provided by sensible-utils
+      std::string const editor = _config->Find("Dir::Bin::Editor",
+	    "sensible-editor");
+      const char *Args[3];
+      Args[0] = editor.c_str();
+      Args[1] = filename.c_str();
+      Args[2] = NULL;
+      execvp(Args[0],(char **)Args);
+      // the usual suspects we can try as an alternative
+      Args[0] = getenv("VISUAL");
+      if (Args[0] != NULL)
+	 execvp(Args[0],(char **)Args);
+
+      Args[0] = getenv("EDITOR");
+      if (Args[0] != NULL)
+	 execvp(Args[0],(char **)Args);
+
+      Args[0] = "editor";
+      execvp(Args[0],(char **)Args);
+      exit(100);
+   }
+
+   // Wait for the subprocess
+   return ExecWait(Process, "editor", false);
+}
+									/*}}}*/
+time_t GetSecondsSinceEpoch()						/*{{{*/
+{
+   auto const source_date_epoch = getenv("SOURCE_DATE_EPOCH");
+   if (source_date_epoch == nullptr)
+      return time(nullptr);
+
+   time_t epoch;
+   std::stringstream ss(source_date_epoch);
+   ss >> epoch;
+
+   if (ss.fail() || !ss.eof())
+   {
+      _error->Warning("Environment variable SOURCE_DATE_EPOCH was ignored as it has an invalid value: \"%s\"",
+            source_date_epoch);
+      return time(nullptr);
+   }
+
+   return epoch;
+}
+									/*}}}*/
diff --git a/apt-private/private-utils.h b/apt-private/private-utils.h
new file mode 100644
index 0000000..4d48bd1
--- /dev/null
+++ b/apt-private/private-utils.h
@@ -0,0 +1,10 @@
+#ifndef APT_PRIVATE_UTILS_H
+#define APT_PRIVATE_UTILS_H
+
+#include <string>
+
+bool DisplayFileInPager(std::string const &filename);
+bool EditFileInSensibleEditor(std::string const &filename);
+time_t GetSecondsSinceEpoch();
+
+#endif