Method GetSystemInformation

Source/cmake.cxx:3723–3831

}

int cmake::GetSystemInformation(std::vector<std::string>& args)
{
  // so create the directory
  std::string resultFile;
  std::string cwd = cmSystemTools::GetLogicalWorkingDirectory();
  std::string destPath = cwd + "/__cmake_systeminformation";
  cmSystemTools::RemoveADirectory(destPath);
  if (!cmSystemTools::MakeDirectory(destPath)) {
    std::cerr << "Error: --system-information must be run from a "
                 "writable directory!\n";
    return 1;
  }

  // process the arguments
  bool writeToStdout = true;
  for (unsigned int i = 1; i < args.size(); ++i) {
    std::string const& arg = args[i];
    if (cmHasLiteralPrefix(arg, "-G")) {
      std::string value = arg.substr(2);
      if (value.empty()) {
        ++i;
        if (i >= args.size()) {
          cmSystemTools::Error("No generator specified for -G");
          this->PrintGeneratorList();
          return -1;
        }
        value = args[i];
      }
      auto gen = this->CreateGlobalGenerator(value);
      if (!gen) {
        cmSystemTools::Error("Could not create named generator " + value);
        this->PrintGeneratorList();
      } else {
        this->SetGlobalGenerator(std::move(gen));
      }
    }
    // no option assume it is the output file
    else {
      if (!cmSystemTools::FileIsFullPath(arg)) {
        resultFile = cmStrCat(cwd, '/');
      }
      resultFile += arg;
      writeToStdout = false;
    }
  }

  // we have to find the module directory, so we can copy the files
  this->AddCMakePaths();
  std::string modulesPath =
    cmStrCat(cmSystemTools::GetCMakeRoot(), "/Modules");
  std::string inFile = cmStrCat(modulesPath, "/SystemInformation.cmake");
  std::string outFile = cmStrCat(destPath, "/CMakeLists.txt");

  // Copy file
  if (!cmsys::SystemTools::CopyFileAlways(inFile, outFile)) {
    std::cerr << "Error copying file \"" << inFile << "\" to \"" << outFile
              << "\".\n";
    return 1;