apt/cmdline/apt-config.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
/* ######################################################################
   
   APT Config - Program to manipulate APT configuration files
   
   This program will parse a config file and then do something with it.
   
   Commands:
     shell - Shell mode. After this a series of word pairs should occur.
             The first is the environment var to set and the second is
             the key to set it from. Use like: 
 eval `apt-config shell QMode apt::QMode`
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include <config.h>

#include <apt-pkg/aptconfiguration.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/error.h>
#include <apt-pkg/init.h>
#include <apt-pkg/pkgsystem.h>
#include <apt-pkg/strutl.h>

#include <cstring>
#include <iostream>
#include <map>
#include <string>
#include <vector>

#include <apt-private/private-cmndline.h>
#include <apt-private/private-main.h>

#include <apti18n.h>
									/*}}}*/
using namespace std;

// DoShell - Handle the shell command					/*{{{*/
// ---------------------------------------------------------------------
/* */
static bool DoShell(CommandLine &CmdL)
{
   for (const char **I = CmdL.FileList + 1; *I != 0; I += 2)
   {
      if (I[1] == 0 || strlen(I[1]) == 0)
	 return _error->Error(_("Arguments not in pairs"));

      string key = I[1];
      if (key.end()[-1] == '/') // old directory format
	 key.append("d");

      if (_config->ExistsAny(key.c_str()))
	 cout << *I << "='" << 
	         SubstVar(_config->FindAny(key.c_str()),"'","'\\''") << '\'' << endl;
      
   }
   
   return true;
}
									/*}}}*/
// DoDump - Dump the configuration space				/*{{{*/
// ---------------------------------------------------------------------
/* */
static bool DoDump(CommandLine &CmdL)
{
   bool const empty = _config->FindB("APT::Config::Dump::EmptyValue", true);
   std::string const format = _config->Find("APT::Config::Dump::Format", "%F \"%v\";\n");
   if (CmdL.FileSize() == 1)
      _config->Dump(cout, NULL, format.c_str(), empty);
   else
      for (const char **I = CmdL.FileList + 1; *I != 0; ++I)
	 _config->Dump(cout, *I, format.c_str(), empty);
   return true;
}
									/*}}}*/
static bool ShowHelp(CommandLine &)					/*{{{*/
{
   std::cout <<
      _("Usage: apt-config [options] command\n"
      "\n"
      "apt-config is an interface to the configuration settings used by\n"
      "all APT tools, mainly intended for debugging and shell scripting.\n");
   return true;
}
									/*}}}*/
static std::vector<aptDispatchWithHelp> GetCommands()			/*{{{*/
{
   return {
      {"shell", &DoShell, _("get configuration values via shell evaluation")},
      {"dump", &DoDump, _("show the active configuration setting")},
      {nullptr, nullptr, nullptr}
   };
}
									/*}}}*/
int main(int argc,const char *argv[])					/*{{{*/
{
   // Parse the command line and initialize the package library
   CommandLine CmdL;
   auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_CONFIG, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);

   std::vector<std::string> const langs = APT::Configuration::getLanguages(true);
   _config->Clear("Acquire::Languages");
   for (std::vector<std::string>::const_iterator l = langs.begin(); l != langs.end(); ++l)
      _config->Set("Acquire::Languages::", *l);

   std::vector<std::string> const archs = APT::Configuration::getArchitectures();
   _config->Clear("APT::Architectures");
   for (std::vector<std::string>::const_iterator a = archs.begin(); a != archs.end(); ++a)
      _config->Set("APT::Architectures::", *a);

   string const conf = "APT::Compressor::";
   std::map<std::string,std::string> CompressorNames;
   for (auto && key : _config->FindVector("APT::Compressor", "", true))
   {
      auto const comp = conf + key + "::Name";
      CompressorNames.emplace(_config->Find(comp, key), key);
   }
   std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
   _config->Clear("APT::Compressor");
   for (std::vector<APT::Configuration::Compressor>::const_iterator c = compressors.begin(); c != compressors.end(); ++c)
   {
      auto const n = CompressorNames.find(c->Name);
      string comp = conf + (n == CompressorNames.end() ? c->Name : n->second) + "::";
      _config->Set(comp + "Name", c->Name);
      _config->Set(comp + "Extension", c->Extension);
      _config->Set(comp + "Binary", c->Binary);
      _config->Set((comp + "Cost").c_str(), c->Cost);
      for (std::vector<std::string>::const_iterator a = c->CompressArgs.begin(); a != c->CompressArgs.end(); ++a)
	 _config->Set(comp + "CompressArg::", *a);
      for (std::vector<std::string>::const_iterator a = c->UncompressArgs.begin(); a != c->UncompressArgs.end(); ++a)
	 _config->Set(comp + "UncompressArg::", *a);
   }

   std::vector<std::string> const profiles = APT::Configuration::getBuildProfiles();
   _config->Clear("APT::Build-Profiles");
   for (std::vector<std::string>::const_iterator p = profiles.begin(); p != profiles.end(); ++p)
      _config->Set("APT::Build-Profiles::", *p);

   return DispatchCommandLine(CmdL, Cmds);
}
									/*}}}*/