simple dynamic inventory file for hookshot / ansible integration

pr.py

#!/usr/bin/env python

import sys
import os

try:
  import json
except ImportError:
  import simplejson as json

GROUP = os.environ.get('ANSIBLE_GROUP', 'all')
HOST = os.environ.get('ANSIBLE_HOST')

if HOST is None:
  raise Exception('Unable to generate inventory, ANSIBLE_HOST not present.')
  exit(1)

inventory = {}
inventory[GROUP] = {}
inventory[GROUP]['hosts'] = [HOST]

if (len(sys.argv) == 2 and sys.argv[1] == "--list"):
  print json.dumps(inventory, indent=2)
else:
  print json.dumps({})