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#!/usr/bin/env python

# This is a slightly modified version of ChromiumOS' splitconfig

# https://chromium.googlesource.com/chromiumos/third_party/kernel/+/stabilize-5899.B-chromeos-3.14/chromeos/scripts/splitconfig

"""See this page for more details:

http://dev.chromium.org/chromium-os/how-tos-and-troubleshooting/kernel-configuration

"""

import os

import re

import sys

allconfigs = {}

# Parse config files

for config in sys.argv[1:]:

allconfigs[config] = set()

for line in open(config):

m = re.match("#*\s*CONFIG_(\w+)[\s=](.*)$", line)

if not m:

continue

option, value = m.groups()

allconfigs[config].add((option, value))

# Split out common config options

common = allconfigs.values()[0].copy()

for config in allconfigs.keys():

common &= allconfigs[config]

for config in allconfigs.keys():

allconfigs[config] -= common

allconfigs["common"] = common

# Generate new splitconfigs

for config in allconfigs.keys():

f = open("split-" + config, "w")

for option, value in sorted(list(allconfigs[config])):

if value == "is not set":

print >>f, "# CONFIG_%s %s" % (option, value)

else:

print >>f, "CONFIG_%s=%s" % (option, value)

f.close()