The reloading magic.

    - First, reload handler.py.
    - Then make copies of all the handler data we want to keep.
    - Create a new handler and restore all the data.

def do_reload(bot, target, cmdargs, server_send=None):
    """The reloading magic.

    - First, reload handler.py.
    - Then make copies of all the handler data we want to keep.
    - Create a new handler and restore all the data.

    """

    def send(msg):
        if server_send is not None:
            server_send("%s\n" % msg)
        else:
            do_log(bot.connection, bot.get_target(target), msg)

    confdir = bot.handler.confdir

    if cmdargs == 'pull':
        # Permission checks.
        if isinstance(target, irc.client.Event) and target.source.nick != bot.config['auth']['owner']:
            bot.connection.privmsg(bot.get_target(target), "Nope, not gonna do it.")
            return
        if exists(join(confdir, '.git')):
            send(misc.do_pull(srcdir=confdir))
        else:
            send(misc.do_pull(repo=bot.config['api']['githubrepo']))
    # Reload config
    importlib.reload(config)
    bot.config = config.load_config(join(confdir, 'config.cfg'), send)
    # Reimport helpers
    errored_helpers = modutils.scan_and_reimport('helpers')
    if errored_helpers:
        send("Failed to load some helpers.")
        for error in errored_helpers:
            send("%s: %s" % error)
        return False
    if not load_modules(bot.config, confdir, send):
        return False

    # preserve data
    data = bot.handler.get_data()
    bot.shutdown_mp()
    bot.handler = handler.BotHandler(bot.config, bot.connection, bot.channels, confdir)
    bot.handler.set_data(data)
    bot.handler.connection = bot.connection
    bot.handler.channels = bot.channels
    return True