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#!/usr/bin/env python3
# Copyright (c) 2019, Ulf Magnusson
# SPDX-License-Identifier: ISC
"""
Simple utility for setting configuration values from the command line.
Sample usage:
$ setconfig FOO_SUPPORT=y BAR_BITS=8
Note: Symbol names should not be prefixed with 'CONFIG_'.
The exit status on errors is 1.
The default input/output configuration file is '.config'. A different filename
can be passed in the KCONFIG_CONFIG environment variable.
When overwriting a configuration file, the old version is saved to
<filename>.old (e.g. .config.old).
"""
import argparse
import sys
import kconfiglib
def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.RawDescriptionHelpFormatter,
description=__doc__)
parser.add_argument(
"--kconfig",
default="Kconfig",
help="Top-level Kconfig file (default: Kconfig)")
parser.add_argument(
"--no-check-exists",
dest="check_exists",
action="store_false",
help="Ignore assignments to non-existent symbols instead of erroring "
"out")
parser.add_argument(
"--no-check-value",
dest="check_value",
action="store_false",
help="Ignore assignments that didn't \"take\" (where the symbol got a "
"different value, e.g. due to unsatisfied dependencies) instead "
"of erroring out")
parser.add_argument(
"assignments",
metavar="ASSIGNMENT",
nargs="*",
help="A 'NAME=value' assignment")
args = parser.parse_args()
kconf = kconfiglib.Kconfig(args.kconfig, suppress_traceback=True)
print(kconf.load_config())
for arg in args.assignments:
if "=" not in arg:
sys.exit("error: no '=' in assignment: '{}'".format(arg))
name, value = arg.split("=", 1)
if name not in kconf.syms:
if not args.check_exists:
continue
sys.exit("error: no symbol '{}' in configuration".format(name))
sym = kconf.syms[name]
if not sym.set_value(value):
sys.exit("error: '{}' is an invalid value for the {} symbol {}"
.format(value, kconfiglib.TYPE_TO_STR[sym.orig_type],
name))
if args.check_value and sym.str_value != value:
sys.exit("error: {} was assigned the value '{}', but got the "
"value '{}'. Check the symbol's dependencies, and make "
"sure that it has a prompt."
.format(name, value, sym.str_value))
print(kconf.write_config())
if __name__ == "__main__":
main()
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