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 <apt-private/private-cmndline.h>
  35
  36 #include <apti18n.h>
  37                                                                         /*}}}*/
  38 using namespace std;
  39
  40 // DoShell - Handle the shell command                                   /*{{{*/
  41 // ---------------------------------------------------------------------
  42 /* */
  43 bool DoShell(CommandLine &CmdL)
  44 {
  45    for (const char **I = CmdL.FileList + 1; *I != 0; I += 2)
  46    {
  47       if (I[1] == 0 || strlen(I[1]) == 0)
  48          return _error->Error(_("Arguments not in pairs"));
  49
  50       string key = I[1];
  51       if (key.end()[-1] == '/') // old directory format
  52          key.append("d");
  53
  54       if (_config->ExistsAny(key.c_str()))
  55          cout << *I << "='" <<
  56                  SubstVar(_config->FindAny(key.c_str()),"'","'\\''") << '\'' << endl;
  57
  58    }
  59
  60    return true;
  61 }
  62                                                                         /*}}}*/
  63 // DoDump - Dump the configuration space                                /*{{{*/
  64 // ---------------------------------------------------------------------
  65 /* */
  66 bool DoDump(CommandLine &CmdL)
  67 {
  68    bool const empty = _config->FindB("APT::Config::Dump::EmptyValue", true);
  69    std::string const format = _config->Find("APT::Config::Dump::Format", "%f \"%v\";\n");
  70    if (CmdL.FileSize() == 1)
  71       _config->Dump(cout, NULL, format.c_str(), empty);
  72    else
  73       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
  74          _config->Dump(cout, *I, format.c_str(), empty);
  75    return true;
  76 }
  77                                                                         /*}}}*/
  78 // ShowHelp - Show the help screen                                      /*{{{*/
  79 // ---------------------------------------------------------------------
  80 /* */
  81 bool ShowHelp(CommandLine &CmdL)
  82 {
  83    ioprintf(cout,_("%s %s for %s compiled on %s %s\n"),PACKAGE,PACKAGE_VERSION,
  84             COMMON_ARCH,__DATE__,__TIME__);
  85    if (_config->FindB("version") == true)
  86       return true;
  87
  88    cout <<
  89     _("Usage: apt-config [options] command\n"
  90       "\n"
  91       "apt-config is a simple tool to read the APT config file\n"
  92       "\n"
  93       "Commands:\n"
  94       "   shell - Shell mode\n"
  95       "   dump - Show the configuration\n"
  96       "\n"
  97       "Options:\n"
  98       "  -h   This help text.\n"
  99       "  -c=? Read this configuration file\n"
 100       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
 101    return true;
 102 }
 103                                                                         /*}}}*/
 104 int main(int argc,const char *argv[])                                   /*{{{*/
 105 {
 106    CommandLine::Dispatch Cmds[] = {{"shell",&DoShell},
 107                                    {"dump",&DoDump},
 108                                    {"help",&ShowHelp},
 109                                    {0,0}};
 110
 111    std::vector<CommandLine::Args> Args = getCommandArgs("apt-cdrom", CommandLine::GetCommand(Cmds, argc, argv));
 112
 113    // Set up gettext support
 114    setlocale(LC_ALL,"");
 115    textdomain(PACKAGE);
 116
 117    // Parse the command line and initialize the package library
 118    CommandLine CmdL(Args.data(),_config);
 119    if (pkgInitConfig(*_config) == false ||
 120        CmdL.Parse(argc,argv) == false ||
 121        pkgInitSystem(*_config,_system) == false)
 122    {
 123       _error->DumpErrors();
 124       return 100;
 125    }
 126
 127    // See if the help should be shown
 128    if (_config->FindB("help") == true ||
 129        CmdL.FileSize() == 0)
 130       return ShowHelp(CmdL);
 131
 132    std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
 133    _config->Clear("Acquire::Languages");
 134    for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
 135       _config->Set("Acquire::Languages::", *l);
 136
 137    std::vector<std::string> const archs = APT::Configuration::getArchitectures();
 138    _config->Clear("APT::Architectures");
 139    for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
 140       _config->Set("APT::Architectures::", *a);
 141
 142    std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
 143    _config->Clear("APT::Compressor");
 144    string conf = "APT::Compressor::";
 145    for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
 146    {
 147       string comp = conf + c->Name + "::";
 148       _config->Set(comp + "Name", c->Name);
 149       _config->Set(comp + "Extension", c->Extension);
 150       _config->Set(comp + "Binary", c->Binary);
 151       _config->Set(std::string(comp + "Cost").c_str(), c->Cost);
 152       for (std::vector<std::string>::const_iterator a = c->CompressArgs.begin(); a != c->CompressArgs.end(); ++a)
 153          _config->Set(comp + "CompressArg::", *a);
 154       for (std::vector<std::string>::const_iterator a = c->UncompressArgs.begin(); a != c->UncompressArgs.end(); ++a)
 155          _config->Set(comp + "UncompressArg::", *a);
 156    }
 157
 158    // Match the operation
 159    CmdL.DispatchArg(Cmds);
 160
 161    // Print any errors or warnings found during parsing
 162    if (_error->empty() == false)
 163    {
 164       bool Errors = _error->PendingError();
 165       _error->DumpErrors();
 166       return Errors == true?100:0;
 167    }
 168
 169    return 0;
 170 }
 171                                                                         /*}}}*/