1 files changed, 167 insertions, 0 deletions
diff --git a/apt-pkg/edsp/edspsystem.cc b/apt-pkg/edsp/edspsystem.cc
new file mode 100644
index 000000000..1ceb21a17
--- /dev/null
+++ b/apt-pkg/edsp/edspsystem.cc
@@ -0,0 +1,167 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* ######################################################################
+
+   This system provides the abstraction to use the scenario file as the
+   only source of package information to be able to feed the created file
+   back to APT for its own consumption (eat your own dogfood).
+
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/debversion.h>
+#include <apt-pkg/edspindexfile.h>
+#include <apt-pkg/edspsystem.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
+#include <apt-pkg/fileutl.h>
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <string>
+#include <vector>
+
+									/*}}}*/
+
+// System::System - Constructor						/*{{{*/
+edspLikeSystem::edspLikeSystem(char const * const Label) : pkgSystem(Label, &debVS)
+{
+}
+edspSystem::edspSystem() : edspLikeSystem("Debian APT solver interface")
+{
+}
+eippSystem::eippSystem() : edspLikeSystem("Debian APT planner interface")
+{
+}
+									/*}}}*/
+// System::Lock - Get the lock						/*{{{*/
+bool edspLikeSystem::Lock()
+{
+   return true;
+}
+									/*}}}*/
+// System::UnLock - Drop a lock						/*{{{*/
+bool edspLikeSystem::UnLock(bool /*NoErrors*/)
+{
+   return true;
+}
+									/*}}}*/
+// System::CreatePM - Create the underlying package manager		/*{{{*/
+// ---------------------------------------------------------------------
+/* we can't use edsp input as input for real installations - just a
+   simulation can work, but everything else will fail bigtime */
+pkgPackageManager *edspLikeSystem::CreatePM(pkgDepCache * /*Cache*/) const
+{
+   return nullptr;
+}
+									/*}}}*/
+// System::Initialize - Setup the configuration space..			/*{{{*/
+bool edspLikeSystem::Initialize(Configuration &Cnf)
+{
+   Cnf.Set("Dir::Log", "/dev/null");
+   // state is included completely in the input files
+   Cnf.Set("Dir::Etc::preferences", "/dev/null");
+   Cnf.Set("Dir::Etc::preferencesparts", "/dev/null");
+   Cnf.Set("Dir::State::status","/dev/null");
+   Cnf.Set("Dir::State::extended_states","/dev/null");
+   Cnf.Set("Dir::State::lists","/dev/null");
+   // do not store an mmap cache
+   Cnf.Set("Dir::Cache::pkgcache", "");
+   Cnf.Set("Dir::Cache::srcpkgcache", "");
+   // the protocols only propose actions, not do them
+   Cnf.Set("Debug::NoLocking", "true");
+   Cnf.Set("APT::Get::Simulate", "true");
+
+   StatusFile.reset(nullptr);
+   return true;
+}
+bool edspSystem::Initialize(Configuration &Cnf)
+{
+   if (edspLikeSystem::Initialize(Cnf) == false)
+      return false;
+   std::string const tmp = GetTempDir();
+   char tmpname[300];
+   snprintf(tmpname, sizeof(tmpname), "%s/apt-edsp-solver-XXXXXX", tmp.c_str());
+   if (nullptr == mkdtemp(tmpname))
+      return false;
+   tempDir = tmpname;
+   tempStatesFile = flCombine(tempDir, "extended_states");
+   Cnf.Set("Dir::State::extended_states", tempStatesFile);
+   tempPrefsFile = flCombine(tempDir, "apt_preferences");
+   Cnf.Set("Dir::Etc::preferences", tempPrefsFile);
+   return true;
+}
+									/*}}}*/
+// System::ArchiveSupported - Is a file format supported		/*{{{*/
+bool edspLikeSystem::ArchiveSupported(const char * /*Type*/)
+{
+   return false;
+}
+									/*}}}*/
+// System::Score - Never use the EDSP system automatically		/*{{{*/
+signed edspLikeSystem::Score(Configuration const &)
+{
+   return -1000;
+}
+									/*}}}*/
+// System::FindIndex - Get an index file for status files		/*{{{*/
+bool edspLikeSystem::FindIndex(pkgCache::PkgFileIterator File,
+			  pkgIndexFile *&Found) const
+{
+   if (StatusFile == 0)
+      return false;
+   if (StatusFile->FindInCache(*File.Cache()) == File)
+   {
+      Found = StatusFile.get();
+      return true;
+   }
+
+   return false;
+}
+									/*}}}*/
+bool edspSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List)	/*{{{*/
+{
+   if (StatusFile == nullptr)
+   {
+      if (_config->Find("edsp::scenario", "") == "/nonexistent/stdin")
+	 StatusFile.reset(new edspIndex("/nonexistent/stdin"));
+      else
+	 StatusFile.reset(new edspIndex(_config->FindFile("edsp::scenario")));
+   }
+   List.push_back(StatusFile.get());
+   return true;
+}
+									/*}}}*/
+bool eippSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List)	/*{{{*/
+{
+   if (StatusFile == nullptr)
+   {
+      if (_config->Find("eipp::scenario", "") == "/nonexistent/stdin")
+	 StatusFile.reset(new eippIndex("/nonexistent/stdin"));
+      else
+	 StatusFile.reset(new eippIndex(_config->FindFile("eipp::scenario")));
+   }
+   List.push_back(StatusFile.get());
+   return true;
+}
+									/*}}}*/
+
+edspLikeSystem::~edspLikeSystem() {}
+edspSystem::~edspSystem()
+{
+   if (tempDir.empty())
+      return;
+
+   RemoveFile("~edspSystem", tempStatesFile);
+   RemoveFile("~edspSystem", tempPrefsFile);
+   rmdir(tempDir.c_str());
+}
+eippSystem::~eippSystem() {}
+
+APT_HIDDEN edspSystem edspSys;
+APT_HIDDEN eippSystem eippSys;