cmdline/apt-config.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: apt-config.cc,v 1.11 2003/01/11 07:18:44 jgg Exp $
   4 /* ######################################################################
   5
   6    APT Config - Program to manipulate APT configuration files
   7
   8    This program will parse a config file and then do something with it.
   9
  10    Commands:
  11      shell - Shell mode. After this a series of word pairs should occure.
  12              The first is the environment var to set and the second is
  13              the key to set it from. Use like:
  14  eval `apt-config shell QMode apt::QMode`
  15
  16    ##################################################################### */
  17                                                                         /*}}}*/
  18 // Include Files                                                        /*{{{*/
  19 #include<config.h>
  20
  21 #include <apt-pkg/cmndline.h>
  22 #include <apt-pkg/error.h>
  23 #include <apt-pkg/init.h>
  24 #include <apt-pkg/strutl.h>
  25 #include <apt-pkg/configuration.h>
  26 #include <apt-pkg/aptconfiguration.h>
  27 #include <apt-pkg/pkgsystem.h>
  28
  29 #include <locale.h>
  30 #include <iostream>
  31 #include <string>
  32 #include <vector>
  33
  34 #include <apti18n.h>
  35                                                                         /*}}}*/
  36 using namespace std;
  37
  38 // DoShell - Handle the shell command                                   /*{{{*/
  39 // ---------------------------------------------------------------------
  40 /* */
  41 bool DoShell(CommandLine &CmdL)
  42 {
  43    for (const char **I = CmdL.FileList + 1; *I != 0; I += 2)
  44    {
  45       if (I[1] == 0 || strlen(I[1]) == 0)
  46          return _error->Error(_("Arguments not in pairs"));
  47
  48       string key = I[1];
  49       if (key.end()[-1] == '/') // old directory format
  50          key.append("d");
  51
  52       if (_config->ExistsAny(key.c_str()))
  53          cout << *I << "='" <<
  54                  SubstVar(_config->FindAny(key.c_str()),"'","'\\''") << '\'' << endl;
  55
  56    }
  57
  58    return true;
  59 }
  60                                                                         /*}}}*/
  61 // DoDump - Dump the configuration space                                /*{{{*/
  62 // ---------------------------------------------------------------------
  63 /* */
  64 bool DoDump(CommandLine &CmdL)
  65 {
  66    bool const empty = _config->FindB("APT::Config::Dump::EmptyValue", true);
  67    std::string const format = _config->Find("APT::Config::Dump::Format", "%f \"%v\";\n");
  68    if (CmdL.FileSize() == 1)
  69       _config->Dump(cout, NULL, format.c_str(), empty);
  70    else
  71       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
  72          _config->Dump(cout, *I, format.c_str(), empty);
  73    return true;
  74 }
  75                                                                         /*}}}*/
  76 // ShowHelp - Show the help screen                                      /*{{{*/
  77 // ---------------------------------------------------------------------
  78 /* */
  79 int ShowHelp()
  80 {
  81    ioprintf(cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
  82             COMMON_ARCH,__DATE__,__TIME__);
  83    if (_config->FindB("version") == true)
  84       return 0;
  85
  86    cout <<
  87     _("Usage: apt-config [options] command\n"
  88       "\n"
  89       "apt-config is a simple tool to read the APT config file\n"
  90       "\n"
  91       "Commands:\n"
  92       "   shell - Shell mode\n"
  93       "   dump - Show the configuration\n"
  94       "\n"
  95       "Options:\n"
  96       "  -h   This help text.\n"
  97       "  -c=? Read this configuration file\n"
  98       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
  99    return 0;
 100 }
 101                                                                         /*}}}*/
 102 int main(int argc,const char *argv[])                                   /*{{{*/
 103 {
 104    CommandLine::Args Args[] = {
 105       {'h',"help","help",0},
 106       {'v',"version","version",0},
 107       {'c',"config-file",0,CommandLine::ConfigFile},
 108       {'o',"option",0,CommandLine::ArbItem},
 109       {0,"empty","APT::Config::Dump::EmptyValue",CommandLine::Boolean},
 110       {0,"format","APT::Config::Dump::Format",CommandLine::HasArg},
 111       {0,0,0,0}};
 112    CommandLine::Dispatch Cmds[] = {{"shell",&DoShell},
 113                                    {"dump",&DoDump},
 114                                    {0,0}};
 115
 116    // Set up gettext support
 117    setlocale(LC_ALL,"");
 118    textdomain(PACKAGE);
 119
 120    // Parse the command line and initialize the package library
 121    CommandLine CmdL(Args,_config);
 122    if (pkgInitConfig(*_config) == false ||
 123        CmdL.Parse(argc,argv) == false ||
 124        pkgInitSystem(*_config,_system) == false)
 125    {
 126       _error->DumpErrors();
 127       return 100;
 128    }
 129
 130    // See if the help should be shown
 131    if (_config->FindB("help") == true ||
 132        CmdL.FileSize() == 0)
 133       return ShowHelp();
 134
 135    std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
 136    _config->Clear("Acquire::Languages");
 137    for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
 138       _config->Set("Acquire::Languages::", *l);
 139
 140    std::vector<std::string> const archs = APT::Configuration::getArchitectures();
 141    _config->Clear("APT::Architectures");
 142    for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
 143       _config->Set("APT::Architectures::", *a);
 144
 145    std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
 146    _config->Clear("APT::Compressor");
 147    string conf = "APT::Compressor::";
 148    for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
 149    {
 150       string comp = conf + c->Name + "::";
 151       _config->Set(comp + "Name", c->Name);
 152       _config->Set(comp + "Extension", c->Extension);
 153       _config->Set(comp + "Binary", c->Binary);
 154       _config->Set(std::string(comp + "Cost").c_str(), c->Cost);
 155       for (std::vector<std::string>::const_iterator a = c->CompressArgs.begin(); a != c->CompressArgs.end(); ++a)
 156          _config->Set(comp + "CompressArg::", *a);
 157       for (std::vector<std::string>::const_iterator a = c->UncompressArgs.begin(); a != c->UncompressArgs.end(); ++a)
 158          _config->Set(comp + "UncompressArg::", *a);
 159    }
 160
 161    // Match the operation
 162    CmdL.DispatchArg(Cmds);
 163
 164    // Print any errors or warnings found during parsing
 165    if (_error->empty() == false)
 166    {
 167       bool Errors = _error->PendingError();
 168       _error->DumpErrors();
 169       return Errors == true?100:0;
 170    }
 171
 172    return 0;
 173 }
 174                                                                         /*}}}*/