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 bool ShowHelp(CommandLine &, aptDispatchWithHelp const * Cmds)          /*{{{*/
  80 {
  81    std::cout <<
  82       _("Usage: apt-config [options] command\n"
  83       "\n"
  84       "apt-config is a simple tool to read the APT config file\n")
  85       << std::endl;
  86    ShowHelpListCommands(Cmds);
  87    std::cout << std::endl <<
  88       _("Options:\n"
  89       "  -h   This help text.\n"
  90       "  -c=? Read this configuration file\n"
  91       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
  92    return true;
  93 }
  94                                                                         /*}}}*/
  95 std::vector<aptDispatchWithHelp> GetCommands()                          /*{{{*/
  96 {
  97    return {
  98       {"shell", &DoShell, _("get configuration values via shell evaluation")},
  99       {"dump", &DoDump, _("show the active configuration setting")},
 100       {nullptr, nullptr, nullptr}
 101    };
 102 }
 103                                                                         /*}}}*/
 104 int main(int argc,const char *argv[])                                   /*{{{*/
 105 {
 106    InitLocale();
 107
 108    // Parse the command line and initialize the package library
 109    CommandLine CmdL;
 110    auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_CONFIG, &_config, &_system, argc, argv);
 111
 112    std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
 113    _config->Clear("Acquire::Languages");
 114    for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
 115       _config->Set("Acquire::Languages::", *l);
 116
 117    std::vector<std::string> const archs = APT::Configuration::getArchitectures();
 118    _config->Clear("APT::Architectures");
 119    for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
 120       _config->Set("APT::Architectures::", *a);
 121
 122    std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
 123    _config->Clear("APT::Compressor");
 124    string conf = "APT::Compressor::";
 125    for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
 126    {
 127       string comp = conf + c->Name + "::";
 128       _config->Set(comp + "Name", c->Name);
 129       _config->Set(comp + "Extension", c->Extension);
 130       _config->Set(comp + "Binary", c->Binary);
 131       _config->Set(std::string(comp + "Cost").c_str(), c->Cost);
 132       for (std::vector<std::string>::const_iterator a = c->CompressArgs.begin(); a != c->CompressArgs.end(); ++a)
 133          _config->Set(comp + "CompressArg::", *a);
 134       for (std::vector<std::string>::const_iterator a = c->UncompressArgs.begin(); a != c->UncompressArgs.end(); ++a)
 135          _config->Set(comp + "UncompressArg::", *a);
 136    }
 137
 138    std::vector<std::string> const profiles = APT::Configuration::getBuildProfiles();
 139    _config->Clear("APT::Build-Profiles");
 140    for (std::vector<std::string>::const_iterator p = profiles.begin(); p != profiles.end(); ++p)
 141       _config->Set("APT::Build-Profiles::", *p);
 142
 143    return DispatchCommandLine(CmdL, Cmds);
 144 }
 145                                                                         /*}}}*/