#!/usr/bin/python
from ConfigParser import ConfigParser
from argparse import ArgumentParser
import fcntl
import socket
import errno
import re
import os,sys
config=ConfigParser({"SharedVMs":"/var/cache/vws/shared","AutostartVMs":"/var/cache/vws/auto"})
def find_vm(name):
    search_path=[os.environ['HOME']+"/VWs",
        config.get("directories","SharedVMs"),
        config.get("directories","AutostartVMs")]
    for dirname in search_path:
        if name in os.listdir(dirname):
            return dirname+"/"+name

def cmd_usb_remove(options):
    raise NotImplementedError
def cmd_usb_attached(options):
    answer=send_command(options.sock,"info usb")
    print answer
def cmd_list(options):
    count = 0
    search_path=[os.environ['HOME']+"/VWs",
        config.get("directories","SharedVMs"),
        config.get("directories","AutostartVMs")]
    for dirname in search_path:
        if not os.access(dirname+"/.",os.X_OK):
            continue
        for vmname in os.listdir(dirname):
            if os.access(dirname+"/"+vmname+"/start",os.X_OK):
                count += 1
                print vmname
    if not count:
        sys.exit(1)
    
#
# Utility functions for arg parsing
#
def new_command(cmds,name,**kwargs):
    """
    Adds a subparser and adds a machine name argument to it
    """
    p=cmds.add_parser(name,**kwargs)
    p.add_argument('machine',type=str,help='name of vm to operate on')
    return p
#
# arg parsing
#



config=ConfigParser({'SharedVMs':'/var/cache/vws/shared',  
    'AuthoStartVMs':'/var/cache/vws/autostart'})

    'AutoStartVMs':'/var/cache/vws/autostart'})
config.add_section('directories')
config.read(['/etc/vws.conf',os.environ['HOME']+'/.vwsrc'])

args=ArgumentParser()
cmds=args.add_subparsers(dest='command',help="sub-command help")
p=cmds.add_parser("list",help="List existing VWs")
p.add_argument("--state",action='store_const',const=True,default=False,
                dest='state',help='Show state of the machine')