apt-pkg/init.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: init.cc,v 1.20 2003/02/09 20:31:05 doogie Exp $
   4 /* ######################################################################
   5
   6    Init - Initialize the package library
   7
   8    ##################################################################### */
   9                                                                         /*}}}*/
  10 // Include files                                                        /*{{{*/
  11 #include <apt-pkg/init.h>
  12 #include <apt-pkg/fileutl.h>
  13 #include <apt-pkg/error.h>
  14
  15 #include <apti18n.h>
  16 #include <config.h>
  17 #include <sys/stat.h>
  18                                                                         /*}}}*/
  19
  20 #define Stringfy_(x) # x
  21 #define Stringfy(x)  Stringfy_(x)
  22 const char *pkgVersion = VERSION;
  23 const char *pkgLibVersion = Stringfy(APT_PKG_MAJOR) "."
  24                             Stringfy(APT_PKG_MINOR) "."
  25                             Stringfy(APT_PKG_RELEASE);
  26 const char *pkgCPU = COMMON_CPU;
  27 const char *pkgOS = COMMON_OS;
  28
  29 // pkgInitConfig - Initialize the configuration class                   /*{{{*/
  30 // ---------------------------------------------------------------------
  31 /* Directories are specified in such a way that the FindDir function will
  32    understand them. That is, if they don't start with a / then their parent
  33    is prepended, this allows a fair degree of flexability. */
  34 bool pkgInitConfig(Configuration &Cnf)
  35 {
  36    // General APT things
  37    if (strcmp(COMMON_OS,"linux") == 0 ||
  38        strcmp(COMMON_OS,"unknown") == 0)
  39       Cnf.Set("APT::Architecture",COMMON_CPU);
  40    else
  41       Cnf.Set("APT::Architecture",COMMON_OS "-" COMMON_CPU);
  42    Cnf.Set("APT::Build-Essential::", "build-essential");
  43    Cnf.Set("Dir","/");
  44
  45    // State
  46    Cnf.Set("Dir::State","var/lib/apt/");
  47
  48    /* Just in case something goes horribly wrong, we can fall back to the
  49       old /var/state paths.. */
  50    struct stat St;
  51    if (stat("/var/lib/apt/.",&St) != 0 &&
  52        stat("/var/state/apt/.",&St) == 0)
  53       Cnf.Set("Dir::State","var/state/apt/");
  54
  55    Cnf.Set("Dir::State::lists","lists/");
  56    Cnf.Set("Dir::State::cdroms","cdroms.list");
  57
  58    // Cache
  59    Cnf.Set("Dir::Cache","var/cache/apt/");
  60    Cnf.Set("Dir::Cache::archives","archives/");
  61    Cnf.Set("Dir::Cache::srcpkgcache","srcpkgcache.bin");
  62    Cnf.Set("Dir::Cache::pkgcache","pkgcache.bin");
  63
  64    // Configuration
  65    Cnf.Set("Dir::Etc","etc/apt/");
  66    Cnf.Set("Dir::Etc::sourcelist","sources.list");
  67    Cnf.Set("Dir::Etc::sourceparts","sources.list.d");
  68    Cnf.Set("Dir::Etc::vendorlist","vendors.list");
  69    Cnf.Set("Dir::Etc::vendorparts","vendors.list.d");
  70    Cnf.Set("Dir::Etc::main","apt.conf");
  71    Cnf.Set("Dir::Etc::parts","apt.conf.d");
  72    Cnf.Set("Dir::Etc::preferences","preferences");
  73    Cnf.Set("Dir::Bin::methods","/usr/lib/apt/methods");
  74
  75    bool Res = true;
  76
  77    // Read an alternate config file
  78    const char *Cfg = getenv("APT_CONFIG");
  79    if (Cfg != 0 && FileExists(Cfg) == true)
  80       Res &= ReadConfigFile(Cnf,Cfg);
  81
  82    // Read the configuration parts dir
  83    string Parts = Cnf.FindDir("Dir::Etc::parts");
  84    if (FileExists(Parts) == true)
  85       Res &= ReadConfigDir(Cnf,Parts);
  86
  87    // Read the main config file
  88    string FName = Cnf.FindFile("Dir::Etc::main");
  89    if (FileExists(FName) == true)
  90       Res &= ReadConfigFile(Cnf,FName);
  91
  92    if (Res == false)
  93       return false;
  94
  95    if (Cnf.FindB("Debug::pkgInitConfig",false) == true)
  96       Cnf.Dump();
  97
  98    return true;
  99 }
 100                                                                         /*}}}*/
 101 // pkgInitSystem - Initialize the _system calss                         /*{{{*/
 102 // ---------------------------------------------------------------------
 103 /* */
 104 bool pkgInitSystem(Configuration &Cnf,pkgSystem *&Sys)
 105 {
 106    Sys = 0;
 107    string Label = Cnf.Find("Apt::System","");
 108    if (Label.empty() == false)
 109    {
 110       Sys = pkgSystem::GetSystem(Label.c_str());
 111       if (Sys == 0)
 112          return _error->Error(_("Packaging system '%s' is not supported"),Label.c_str());
 113    }
 114    else
 115    {
 116       signed MaxScore = 0;
 117       for (unsigned I = 0; I != pkgSystem::GlobalListLen; I++)
 118       {
 119          signed Score = pkgSystem::GlobalList[I]->Score(Cnf);
 120          if (Score > MaxScore)
 121          {
 122             MaxScore = Score;
 123             Sys = pkgSystem::GlobalList[I];
 124          }
 125       }
 126
 127       if (Sys == 0)
 128          return _error->Error(_("Unable to determine a suitable packaging system type"));
 129    }
 130
 131    return Sys->Initialize(Cnf);
 132 }
 133                                                                         /*}}}*/