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
  36 #include <apti18n.h>
  37                                                                         /*}}}*/
  38 using namespace std;
  39
  40 // DoShell - Handle the shell command                                   /*{{{*/
  41 // ---------------------------------------------------------------------
  42 /* */
  43 static 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 static 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 static bool ShowHelp(CommandLine &, CommandLine::DispatchWithHelp const * Cmds)
  82 {
  83    ioprintf(cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);
  84    if (_config->FindB("version") == true)
  85       return true;
  86
  87    std::cout <<
  88       _("Usage: apt-config [options] command\n"
  89       "\n"
  90       "apt-config is a simple tool to read the APT config file\n")
  91       << std::endl
  92       << _("Commands:") << std::endl;
  93    for (; Cmds->Handler != nullptr; ++Cmds)
  94    {
  95       if (Cmds->Help == nullptr)
  96          continue;
  97       std::cout << "  " << Cmds->Match << " - " << Cmds->Help << std::endl;
  98    }
  99
 100    std::cout << std::endl <<
 101       _("Options:\n"
 102       "  -h   This help text.\n"
 103       "  -c=? Read this configuration file\n"
 104       "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
 105    return true;
 106 }
 107                                                                         /*}}}*/
 108 int main(int argc,const char *argv[])                                   /*{{{*/
 109 {
 110    CommandLine::DispatchWithHelp Cmds[] = {
 111       {"shell", &DoShell, _("get configuration values via shell evaluation")},
 112       {"dump", &DoDump, _("show the active configuration setting")},
 113       {nullptr, nullptr, nullptr}
 114    };
 115
 116    std::vector<CommandLine::Args> Args = getCommandArgs("apt-config", CommandLine::GetCommand(Cmds, argc, argv));
 117
 118    // Set up gettext support
 119    setlocale(LC_ALL,"");
 120    textdomain(PACKAGE);
 121
 122    // Parse the command line and initialize the package library
 123    CommandLine CmdL;
 124    ParseCommandLine(CmdL, Cmds, Args.data(), &_config, &_system, argc, argv, ShowHelp);
 125
 126    std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
 127    _config->Clear("Acquire::Languages");
 128    for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
 129       _config->Set("Acquire::Languages::", *l);
 130
 131    std::vector<std::string> const archs = APT::Configuration::getArchitectures();
 132    _config->Clear("APT::Architectures");
 133    for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
 134       _config->Set("APT::Architectures::", *a);
 135
 136    std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
 137    _config->Clear("APT::Compressor");
 138    string conf = "APT::Compressor::";
 139    for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
 140    {
 141       string comp = conf + c->Name + "::";
 142       _config->Set(comp + "Name", c->Name);
 143       _config->Set(comp + "Extension", c->Extension);
 144       _config->Set(comp + "Binary", c->Binary);
 145       _config->Set(std::string(comp + "Cost").c_str(), c->Cost);
 146       for (std::vector<std::string>::const_iterator a = c->CompressArgs.begin(); a != c->CompressArgs.end(); ++a)
 147          _config->Set(comp + "CompressArg::", *a);
 148       for (std::vector<std::string>::const_iterator a = c->UncompressArgs.begin(); a != c->UncompressArgs.end(); ++a)
 149          _config->Set(comp + "UncompressArg::", *a);
 150    }
 151
 152    std::vector<std::string> const profiles = APT::Configuration::getBuildProfiles();
 153    _config->Clear("APT::Build-Profiles");
 154    for (std::vector<std::string>::const_iterator p = profiles.begin(); p != profiles.end(); ++p)
 155       _config->Set("APT::Build-Profiles::", *p);
 156
 157    // Match the operation
 158    CmdL.DispatchArg(Cmds);
 159
 160    // Print any errors or warnings found during parsing
 161    if (_error->empty() == false)
 162    {
 163       bool Errors = _error->PendingError();
 164       _error->DumpErrors();
 165       return Errors == true?100:0;
 166    }
 167
 168    return 0;
 169 }
 170                                                                         /*}}}*/