#! /usr/bin/env python
# -*- coding: utf-8 -*-

import subprocess

def trigger_generate(host, background=False):
    if not 'adm.crans.org' in host:
        host=host + '.adm.crans.org'
    options = ['PasswordAuthentication=no', 'ConnectTimeout=1', 'VerifyHostKeyDNS=yes',
        'BatchMode=yes', 'ServerAliveInterval=5', 'ServerAliveCountMax=1']
    args = ["ssh", "-4", "-i", "/etc/crans/secrets/trigger-generate" ]
    for opt in options:
        args.append('-o')
        args.append(opt)
    args.extend(["rpcssh@%s" % host, "generate"])
    if background:
        subprocess.Popen(args)
    else:
        p=subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        out, err = p.communicate()
        if err:
            raise Exception(err)
        return out