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#!/usr/bin/env python
# Copyright (c) 2018, Ulf Magnusson
# SPDX-License-Identifier: ISC
# Works like 'make allnoconfig'. Verified by the test suite to generate
# identical output to 'make allnoconfig' for all ARCHes.
#
# See the examples/allnoconfig_walk.py example script for another variant.
#
# The default output filename is '.config'. A different filename can be passed
# in the KCONFIG_CONFIG environment variable.
#
# Usage for the Linux kernel:
#
# $ make [ARCH=<arch>] scriptconfig SCRIPT=Kconfiglib/allnoconfig.py
import kconfiglib
def main():
kconf = kconfiglib.standard_kconfig()
# Avoid warnings that would otherwise get printed by Kconfiglib for the
# following:
#
# 1. Assigning a value to a symbol without a prompt, which never has any
# effect
#
# 2. Assigning values invalid for the type (only bool/tristate symbols
# accept 0/1/2, for n/m/y). The assignments will be ignored for other
# symbol types, which is what we want.
kconf.disable_warnings()
for sym in kconf.unique_defined_syms:
sym.set_value(2 if sym.is_allnoconfig_y else 0)
kconf.write_config(kconfiglib.standard_config_filename())
if __name__ == "__main__":
main()
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