dynamic.py

#!/usr/bin/env python

import os
import argparse
import sys

try:
   import json
except ImportError:
   import simplejson as json

class OurInventory(object):

        def __init__(self):
            self.inventory = {}
            self.read_cli_args()

            if self.args.list:
                self.inventory = self.our_inventory()
            elif self.args.host:
                self.inventory = self.empty_inventory()
            else:
                self.inventory = self.empty_inventory()

            print json.dumps(self.inventory)


        def our_inventory(self):
                return {
                        'group': {
                                'hosts' : [ 'ansible-node1','ansible-node2' ],
                                'vars' : {
                                        'ansible_user' : 'ansible'
                                }
                        },
                        '_meta' : {
                                'hostvars' : {
                                        'ansible-node1' : {
                                                'home_dir' : '/home/ansible'
                                        },
                                        'ansible-node2' : {
                                                'home_dir' : '/home/ansible'
                                        }
                                }
                        }
                }

        def empty_inventory(self):
                return { '_meta' : { 'hostvars' : {} } }

        def read_cli_args(self):
                parser = argparse.ArgumentParser()
                parser.add_argument('--list', action='store_true')
                parser.add_argument('--host', action='store')
                self.args = parser.parse_args()

OurInventory()