#!/usr/bin/env python

import optparse
import os.path
import re
import sys

from debian_linux.kconfig import *

def merge(output, configs, overrides):
    kconfig = KconfigFile()
    for c in configs:
        kconfig.read(file(c))
    for key, value in overrides.iteritems():
        kconfig.set(key, value)
    file(output, "w").write(str(kconfig))

def opt_callback_dict(option, opt, value, parser):
    match = re.match('^\s*(\S+)=(\S+)\s*$', value)
    if not match:
        raise optparse.OptionValueError('not key=value')
    dest = option.dest
    data = getattr(parser.values, dest)
    data[match.group(1)] = match.group(2)

if __name__ == '__main__':
    parser = optparse.OptionParser(usage = "%prog [OPTION]... FILE...")
    parser.add_option('-o', '--override',
            action='callback',
            callback=opt_callback_dict,
            default={},
            dest='overrides',
            help="Override option",
            type='string')
    options, args = parser.parse_args()

    merge(args[0], args[1:], options.overrides)