apt-pkg/edsp/edspsystem.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 /* ######################################################################
   4
   5    This system provides the abstraction to use the scenario file as the
   6    only source of package information to be able to feed the created file
   7    back to APT for its own consumption (eat your own dogfood).
   8
   9    ##################################################################### */
  10                                                                         /*}}}*/
  11 // Include Files                                                        /*{{{*/
  12 #include <config.h>
  13
  14 #include <apt-pkg/edspsystem.h>
  15 #include <apt-pkg/debversion.h>
  16 #include <apt-pkg/edspindexfile.h>
  17 #include <apt-pkg/configuration.h>
  18 #include <apt-pkg/error.h>
  19 #include <apt-pkg/fileutl.h>
  20 #include <sys/types.h>
  21 #include <unistd.h>
  22 #include <dirent.h>
  23 #include <errno.h>
  24
  25 #include <apti18n.h>
  26                                                                         /*}}}*/
  27
  28 edspSystem edspSys;
  29
  30 // System::debSystem - Constructor                                      /*{{{*/
  31 edspSystem::edspSystem()
  32 {
  33    StatusFile = 0;
  34
  35    Label = "Debian APT solver interface";
  36    VS = &debVS;
  37 }
  38                                                                         /*}}}*/
  39 // System::~debSystem - Destructor                                      /*{{{*/
  40 edspSystem::~edspSystem()
  41 {
  42    delete StatusFile;
  43 }
  44                                                                         /*}}}*/
  45 // System::Lock - Get the lock                                          /*{{{*/
  46 bool edspSystem::Lock()
  47 {
  48    return true;
  49 }
  50                                                                         /*}}}*/
  51 // System::UnLock - Drop a lock                                         /*{{{*/
  52 bool edspSystem::UnLock(bool NoErrors)
  53 {
  54    return true;
  55 }
  56                                                                         /*}}}*/
  57 // System::CreatePM - Create the underlying package manager             /*{{{*/
  58 // ---------------------------------------------------------------------
  59 /* we can't use edsp input as input for real installations - just a
  60    simulation can work, but everything else will fail bigtime */
  61 pkgPackageManager *edspSystem::CreatePM(pkgDepCache *Cache) const
  62 {
  63    return NULL;
  64 }
  65                                                                         /*}}}*/
  66 // System::Initialize - Setup the configuration space..                 /*{{{*/
  67 bool edspSystem::Initialize(Configuration &Cnf)
  68 {
  69    Cnf.Set("Dir::State::extended_states", "/dev/null");
  70    Cnf.Set("Dir::State::status","/dev/null");
  71    Cnf.Set("Dir::State::lists","/dev/null");
  72
  73    Cnf.Set("Debug::NoLocking", "true");
  74    Cnf.Set("APT::Get::Simulate", "true");
  75
  76    if (StatusFile) {
  77      delete StatusFile;
  78      StatusFile = 0;
  79    }
  80    return true;
  81 }
  82                                                                         /*}}}*/
  83 // System::ArchiveSupported - Is a file format supported                /*{{{*/
  84 bool edspSystem::ArchiveSupported(const char *Type)
  85 {
  86    return false;
  87 }
  88                                                                         /*}}}*/
  89 // System::Score - Determine if we should use the edsp system           /*{{{*/
  90 signed edspSystem::Score(Configuration const &Cnf)
  91 {
  92    if (Cnf.Find("edsp::scenario", "") == "stdin")
  93       return 1000;
  94    if (FileExists(Cnf.FindFile("edsp::scenario","")) == true)
  95       return 1000;
  96    return -1000;
  97 }
  98                                                                         /*}}}*/
  99 // System::AddStatusFiles - Register the status files                   /*{{{*/
 100 bool edspSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List)
 101 {
 102    if (StatusFile == 0)
 103    {
 104       if (_config->Find("edsp::scenario", "") == "stdin")
 105          StatusFile = new edspIndex("stdin");
 106       else
 107          StatusFile = new edspIndex(_config->FindFile("edsp::scenario"));
 108    }
 109    List.push_back(StatusFile);
 110    return true;
 111 }
 112                                                                         /*}}}*/
 113 // System::FindIndex - Get an index file for status files               /*{{{*/
 114 bool edspSystem::FindIndex(pkgCache::PkgFileIterator File,
 115                           pkgIndexFile *&Found) const
 116 {
 117    if (StatusFile == 0)
 118       return false;
 119    if (StatusFile->FindInCache(*File.Cache()) == File)
 120    {
 121       Found = StatusFile;
 122       return true;
 123    }
 124
 125    return false;
 126 }
 127                                                                         /*}}}*/