def slack_finished():
    try:
        host_finished(env.host)
        if did_send_slack_start and len(hosts_to_use) == 0:
            slack_url_helper.message_slack("{} finished".format(env.rfc))
    except:
        print "*** We couldn't post the RFC finished message to slack. Not critical, but you will need to post the RFC info to rfc_and_maint-tasks"
def slack_start():
    global did_send_slack_start
    try:
        list_hosts()

        if "rfc" in env and env.rfc is not "" and not did_send_slack_start:
            did_send_slack_start = True
            slack_url_helper.message_slack("{} starting".format(env.rfc))
    except:
        print "*** We couldn't post the RFC started message to slack. Not critical, but you will need to post the RFC info to rfc_and_maint-tasks"