<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:

def gather_bootstrap_script(bootstrap=None):
    '''
    Download the salt-bootstrap script, and return its location

    bootstrap
        URL of alternate bootstrap script

    CLI Example:

    .. code-block:: bash

        salt '*' config.gather_bootstrap_script
    '''
    if not HAS_CLOUD:
        return False, 'config.gather_bootstrap_script is unavailable'
    ret = salt.utils.cloud.update_bootstrap(__opts__, url=bootstrap)
    if 'Success' in ret and ret['Success']['Files updated']:
        return ret['Success']['Files updated'][0]