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 occur.
  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 <iostream>
  30 #include <string>
  31 #include <vector>
  32 #include <string.h>
  33
  34 #include <apt-private/private-cmndline.h>
  35 #include <apt-private/private-main.h>
  36
  37 #include <apti18n.h>
  38                                                                         /*}}}*/
  39 using namespace std;
  40
  41 // DoShell - Handle the shell command                                   /*{{{*/
  42 // ---------------------------------------------------------------------
  43 /* */
  44 static bool DoShell(CommandLine &CmdL)
  45 {
  46    for (const char **I = CmdL.FileList + 1; *I != 0; I += 2)
  47    {
  48       if (I[1] == 0 || strlen(I[1]) == 0)
  49          return _error->Error(_("Arguments not in pairs"));
  50
  51       string key = I[1];
  52       if (key.end()[-1] == '/') // old directory format
  53          key.append("d");
  54
  55       if (_config->ExistsAny(key.c_str()))
  56          cout << *I << "='" <<
  57                  SubstVar(_config->FindAny(key.c_str()),"'","'\\''") << '\'' << endl;
  58
  59    }
  60
  61    return true;
  62 }
  63                                                                         /*}}}*/
  64 // DoDump - Dump the configuration space                                /*{{{*/
  65 // ---------------------------------------------------------------------
  66 /* */
  67 static bool DoDump(CommandLine &CmdL)
  68 {
  69    bool const empty = _config->FindB("APT::Config::Dump::EmptyValue", true);
  70    std::string const format = _config->Find("APT::Config::Dump::Format", "%f \"%v\";\n");
  71    if (CmdL.FileSize() == 1)
  72       _config->Dump(cout, NULL, format.c_str(), empty);
  73    else
  74       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
  75          _config->Dump(cout, *I, format.c_str(), empty);
  76    return true;
  77 }
  78                                                                         /*}}}*/
  79 // ShowHelp - Show the help screen                                      /*{{{*/
  80 bool ShowHelp(CommandLine &, CommandLine::DispatchWithHelp const * Cmds)
  81 {
  82    ioprintf(cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);
  83    if (_config->FindB("version") == true)
  84       return true;
  85
  86    std::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       << std::endl
  91       << _("Commands:") << std::endl;
  92    for (; Cmds->Handler != nullptr; ++Cmds)
  93    {
  94       if (Cmds->Help == nullptr)
  95          continue;
  96       std::cout << "  " << Cmds->Match << " - " << Cmds->Help << std::endl;
  97    }
  98
  99    std::cout << std::endl <<
 100       _("Options:\n"
 101       "  -h   This help text.\n"
 102       "  -c=? Read this configuration file\n"
 103       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
 104    return true;
 105 }
 106                                                                         /*}}}*/
 107 std::vector<CommandLine::DispatchWithHelp> GetCommands()                /*{{{*/
 108 {
 109    return {
 110       {"shell", &DoShell, _("get configuration values via shell evaluation")},
 111       {"dump", &DoDump, _("show the active configuration setting")},
 112       {nullptr, nullptr, nullptr}
 113    };
 114 }
 115                                                                         /*}}}*/
 116 int main(int argc,const char *argv[])                                   /*{{{*/
 117 {
 118    InitLocale();
 119
 120    // Parse the command line and initialize the package library
 121    CommandLine CmdL;
 122    auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_CONFIG, &_config, &_system, argc, argv);
 123
 124    std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
 125    _config->Clear("Acquire::Languages");
 126    for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
 127       _config->Set("Acquire::Languages::", *l);
 128
 129    std::vector<std::string> const archs = APT::Configuration::getArchitectures();
 130    _config->Clear("APT::Architectures");
 131    for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
 132       _config->Set("APT::Architectures::", *a);
 133
 134    std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
 135    _config->Clear("APT::Compressor");
 136    string conf = "APT::Compressor::";
 137    for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
 138    {
 139       string comp = conf + c->Name + "::";
 140       _config->Set(comp + "Name", c->Name);
 141       _config->Set(comp + "Extension", c->Extension);
 142       _config->Set(comp + "Binary", c->Binary);
 143       _config->Set(std::string(comp + "Cost").c_str(), c->Cost);
 144       for (std::vector<std::string>::const_iterator a = c->CompressArgs.begin(); a != c->CompressArgs.end(); ++a)
 145          _config->Set(comp + "CompressArg::", *a);
 146       for (std::vector<std::string>::const_iterator a = c->UncompressArgs.begin(); a != c->UncompressArgs.end(); ++a)
 147          _config->Set(comp + "UncompressArg::", *a);
 148    }
 149
 150    std::vector<std::string> const profiles = APT::Configuration::getBuildProfiles();
 151    _config->Clear("APT::Build-Profiles");
 152    for (std::vector<std::string>::const_iterator p = profiles.begin(); p != profiles.end(); ++p)
 153       _config->Set("APT::Build-Profiles::", *p);
 154
 155    return DispatchCommandLine(CmdL, Cmds);
 156 }
 157                                                                         /*}}}*/