Method init

src/Client/ClientApplicationBase.cpp:153–276

}

void ClientApplicationBase::init(int argc, char ** argv)
{
    namespace po = boost::program_options;

    /// Don't parse options with Poco library, we prefer neat boost::program_options.
    stopOptionsProcessing();

    std::vector<Arguments> external_tables_arguments;
    Arguments common_arguments = {""}; /// 0th argument is ignored.
    std::vector<Arguments> hosts_and_ports_arguments;

    if (argc)
        argv0 = argv[0];

    /// Set application name for help messages based on how the binary was invoked
    std::string_view argv0_view(argv0 ? argv0 : "");
    std::string name_with_dash = "clickhouse-" + getName();
    if (argv0_view.find(name_with_dash) != std::string_view::npos)
        app_name = name_with_dash;
    else
        app_name = "clickhouse " + getName();

    readArguments(argc, argv, common_arguments, external_tables_arguments, hosts_and_ports_arguments);

    /// Support for Unicode dashes
    /// Interpret Unicode dashes as default double-hyphen
    for (auto & arg : common_arguments)
    {
        // replace em-dash(U+2014)
        boost::replace_all(arg, "—", "--");
        // replace en-dash(U+2013)
        boost::replace_all(arg, "–", "--");
        // replace mathematical minus(U+2212)
        boost::replace_all(arg, "−", "--");
    }

    OptionsDescription options_description;
    addCommonOptions(options_description);
    addExtraOptions(options_description);
    /// Copy them to be able to print a simplified version of the help message.
    OptionsDescription options_description_non_verbose = options_description;
    addSettingsToProgramOptionsAndSubscribeToChanges(options_description);
    addOptionsToHints(options_description);

    po::variables_map options;
    parseAndCheckOptions(options_description, options, common_arguments);
    po::notify(options);

    if (options.contains("version") || options.contains("V"))
    {
        showClientVersion();
        exit(0); // NOLINT(concurrency-mt-unsafe)
    }

    if (options.contains("version-clean"))
    {
        output_stream << VERSION_STRING;
        exit(0); // NOLINT(concurrency-mt-unsafe)