Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

def run_migrations_offline():
    """Run migrations in 'offline' mode.

    This configures the context with just a URL
    and not an Engine, though an Engine is acceptable
    here as well.  By skipping the Engine creation
    we don't even need a DBAPI to be available.

    Calls to context.execute() here emit the given string to the
    script output.

    """
    botconfig = configparser.ConfigParser(interpolation=configparser.ExtendedInterpolation())
    config_path = config.get_main_option('bot_config_path', join(dirname(__file__), '../..'))
    with open(join(config_path, 'config.cfg')) as f:
        botconfig.read_file(f)
    url = botconfig['db']['engine']

    context.configure(url=url, target_metadata=target_metadata)

    with context.begin_transaction():
        context.run_migrations()