facter_to_hiera

#!/usr/bin/env python
# 2015, s.andres@syseleven.de

import json
import re
from subprocess import check_output
from optparse import OptionParser

def process_args():

    parser = OptionParser()
    parser.add_option("--key", action="append", help="This option takes "
                    "a <key>=<value> pair as its argument and may be specified "
                    "multiple times. Existing facts' values that match <key> "
                    "will be replaced by the specified value. This will only "
                    "affect facts existing on this system. Non-existent facts "
                    "will not be added.")

    (options, args) = parser.parse_args()

    return options, args

if __name__ == '__main__':
    options, args = process_args()

    facts = json.loads(check_output('facter -j', shell=True))
    facts_new = {}
    for fact in facts:
        if options.key:
            for option in options.key:
                o = option.split('=')
                if o[0] == fact:
                    facts[fact] = o[1]

        fact_replaced = re.sub('(.*)', '::\g<1>', fact)
        facts_new[fact_replaced] = facts[fact]

    print json.dumps(facts_new)