#!/usr/bin/python

import itertools
import json
import string
import sys
import yaml

from yamljsonlib import template_replace

# Find all placeholders in the input and replace them with the values of
# equivalently-named environment variables.
def main():
    with open(sys.argv[1]) as f:
        template = string.Template(f.read())
    lava_template = template_replace(template)

    # FIXME: use ordered dictionaries - see http://pyyaml.org/ticket/29
    config = json.dumps(yaml.safe_load(lava_template), indent=2, separators=(',', ': '))
    print config


if __name__ == '__main__':
    main()