Function mainEntryClickHouseStart

programs/install/Install.cpp:1248–1306

int mainEntryClickHouseStart(int argc, char ** argv);
int mainEntryClickHouseStart(int argc, char ** argv)
{
    try
    {
        po::options_description desc;
        desc.add_options()
            ("help,h", "produce help message")
            ("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
#if defined (OS_DARWIN)
            /// https://stackoverflow.com/a/36734569/22422288
            ("binary-path", po::value<std::string>()->default_value("usr/local/bin"), "directory with binary")
#else
            ("binary-path", po::value<std::string>()->default_value("usr/bin"), "directory with binary")
#endif
            ("config-path", po::value<std::string>()->default_value("etc/clickhouse-server"), "directory with configs")
            ("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
            ("user", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_USER), "clickhouse user")
            ("group", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_GROUP), "clickhouse group")
            ("no-sudo", po::bool_switch(), "use clickhouse su instead of sudo (useful when running in a Docker container)")
            ("max-tries", po::value<unsigned>()->default_value(60), "Max number of tries for waiting the server (with 1 second delay)")
        ;

        po::variables_map options;
        po::store(po::parse_command_line(argc, argv, desc), options);

        bool no_sudo = options["no-sudo"].as<bool>();

        if (options.contains("help"))
        {
            std::cout << "Usage: " << formatWithSudo("clickhouse start", !no_sudo && getuid() != 0) << " [options]\n";
            std::cout << desc << "\n";
            return 0;
        }

        std::string user = options["user"].as<std::string>();
        std::string group = options["group"].as<std::string>();
        /// `--group` has a default for help/documentation purposes only.
        /// It should be applied to the launched server only when the user
        /// explicitly requested it. Otherwise `clickhouse start --user alice`
        /// would force `-g clickhouse` (or `alice:clickhouse` on the no-sudo
        /// path), which fails when the user is not a member of `clickhouse`.
        if (options["group"].defaulted())
            group.clear();

        fs::path prefix = options["prefix"].as<std::string>();
        fs::path binary = prefix / options["binary-path"].as<std::string>() / "clickhouse";
        fs::path executable = prefix / options["binary-path"].as<std::string>() / "clickhouse-server";
        fs::path config = prefix / options["config-path"].as<std::string>() / "config.xml";
        fs::path pid_file = prefix / options["pid-path"].as<std::string>() / "clickhouse-server.pid";
        unsigned max_tries = options["max-tries"].as<unsigned>();

        return start(user, group, binary, executable, config, pid_file, max_tries, no_sudo);
    }
    catch (...)
    {
        std::cerr << getCurrentExceptionMessage(false) << '\n';
        return getCurrentExceptionCode();
    }