from keystoneclient.auth.identity import v3
from keystoneclient import session
from keystoneclient.v3 import client

from os import environ
from subprocess import Popen, PIPE, call, check_output, check_call

#interactive-fu
import rlcompleter, readline
readline.parse_and_bind('tab: complete')

debug=True
os_auth_file='/etc/openrcV3' #where to find authentication bits

def source(script, update=True, clean=True):
    """
    Source variables from a shell script
    import them in the environment (if update==True)
    and report only the script variables (if clean==True)
    """

    global environ
    if clean:
        environ_back = dict(environ)
        environ.clear()

        pipe = Popen(". %s; env" % script, stdout=PIPE, shell=True)
        data = pipe.communicate()[0]

        env = dict((line.split("=", 1) for line in data.splitlines()))

    if clean:
        # remove unwanted minimal vars
        env.pop('LINES', None)
        env.pop('COLUMNS', None)
        environ = dict(environ_back)

    if update:
        environ.update(env)

    return env

os_auth = source(os_auth_file)


auth = v3.Password(auth_url=os_auth['OS_AUTH_URL'],
                   username=os_auth['OS_USERNAME'],
                   password=os_auth['OS_PASSWORD'],
                   project_domain_name='default',user_domain_name='default',
                   project_name=os_auth['OS_TENANT_NAME'])
sess = session.Session(auth=auth)

keystone = client.Client(session=sess)