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 <map>
  33 #include <string.h>
  34
  35 #include <apt-private/private-cmndline.h>
  36 #include <apt-private/private-main.h>
  37
  38 #include <apti18n.h>
  39                                                                         /*}}}*/
  40 using namespace std;
  41
  42 // DoShell - Handle the shell command                                   /*{{{*/
  43 // ---------------------------------------------------------------------
  44 /* */
  45 static bool DoShell(CommandLine &CmdL)
  46 {
  47    for (const char **I = CmdL.FileList + 1; *I != 0; I += 2)
  48    {
  49       if (I[1] == 0 || strlen(I[1]) == 0)
  50          return _error->Error(_("Arguments not in pairs"));
  51
  52       string key = I[1];
  53       if (key.end()[-1] == '/') // old directory format
  54          key.append("d");
  55
  56       if (_config->ExistsAny(key.c_str()))
  57          cout << *I << "='" <<
  58                  SubstVar(_config->FindAny(key.c_str()),"'","'\\''") << '\'' << endl;
  59
  60    }
  61
  62    return true;
  63 }
  64                                                                         /*}}}*/
  65 // DoDump - Dump the configuration space                                /*{{{*/
  66 // ---------------------------------------------------------------------
  67 /* */
  68 static bool DoDump(CommandLine &CmdL)
  69 {
  70    bool const empty = _config->FindB("APT::Config::Dump::EmptyValue", true);
  71    std::string const format = _config->Find("APT::Config::Dump::Format", "%f \"%v\";\n");
  72    if (CmdL.FileSize() == 1)
  73       _config->Dump(cout, NULL, format.c_str(), empty);
  74    else
  75       for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
  76          _config->Dump(cout, *I, format.c_str(), empty);
  77    return true;
  78 }
  79                                                                         /*}}}*/
  80 static bool ShowHelp(CommandLine &)                                     /*{{{*/
  81 {
  82    std::cout <<
  83       _("Usage: apt-config [options] command\n"
  84       "\n"
  85       "apt-config is an interface to the configuration settings used by\n"
  86       "all APT tools, mainly intended for debugging and shell scripting.\n");
  87    return true;
  88 }
  89                                                                         /*}}}*/
  90 static std::vector<aptDispatchWithHelp> GetCommands()                   /*{{{*/
  91 {
  92    return {
  93       {"shell", &DoShell, _("get configuration values via shell evaluation")},
  94       {"dump", &DoDump, _("show the active configuration setting")},
  95       {nullptr, nullptr, nullptr}
  96    };
  97 }
  98                                                                         /*}}}*/
  99 int main(int argc,const char *argv[])                                   /*{{{*/
 100 {
 101    // Parse the command line and initialize the package library
 102    CommandLine CmdL;
 103    auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_CONFIG, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
 104
 105    std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
 106    _config->Clear("Acquire::Languages");
 107    for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
 108       _config->Set("Acquire::Languages::", *l);
 109
 110    std::vector<std::string> const archs = APT::Configuration::getArchitectures();
 111    _config->Clear("APT::Architectures");
 112    for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
 113       _config->Set("APT::Architectures::", *a);
 114
 115    string const conf = "APT::Compressor::";
 116    std::map<std::string,std::string> CompressorNames;
 117    for (auto && key : _config->FindVector("APT::Compressor", "", true))
 118    {
 119       auto const comp = conf + key + "::Name";
 120       CompressorNames.emplace(_config->Find(comp, key), key);
 121    }
 122    std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
 123    _config->Clear("APT::Compressor");
 124    for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
 125    {
 126       auto const n = CompressorNames.find(c->Name);
 127       string comp = conf + (n == CompressorNames.end() ? c->Name : n->second) + "::";
 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                                                                         /*}}}*/