1#!/usr/bin/env python3 2 3# Copyright (c) 2019, Ulf Magnusson 4# SPDX-License-Identifier: ISC 5 6""" 7Simple utility for setting configuration values from the command line. 8 9Sample usage: 10 11 $ setconfig FOO_SUPPORT=y BAR_BITS=8 12 13Note: Symbol names should not be prefixed with 'CONFIG_'. 14 15The exit status on errors is 1. 16 17The default input/output configuration file is '.config'. A different filename 18can be passed in the KCONFIG_CONFIG environment variable. 19 20When overwriting a configuration file, the old version is saved to 21<filename>.old (e.g. .config.old). 22""" 23import argparse 24import sys 25 26import kconfiglib 27 28 29def main(): 30 parser = argparse.ArgumentParser( 31 formatter_class=argparse.RawDescriptionHelpFormatter, 32 description=__doc__) 33 34 parser.add_argument( 35 "--kconfig", 36 default="Kconfig", 37 help="Top-level Kconfig file (default: Kconfig)") 38 39 parser.add_argument( 40 "--no-check-exists", 41 dest="check_exists", 42 action="store_false", 43 help="Ignore assignments to non-existent symbols instead of erroring " 44 "out") 45 46 parser.add_argument( 47 "--no-check-value", 48 dest="check_value", 49 action="store_false", 50 help="Ignore assignments that didn't \"take\" (where the symbol got a " 51 "different value, e.g. due to unsatisfied dependencies) instead " 52 "of erroring out") 53 54 parser.add_argument( 55 "assignments", 56 metavar="ASSIGNMENT", 57 nargs="*", 58 help="A 'NAME=value' assignment") 59 60 args = parser.parse_args() 61 62 kconf = kconfiglib.Kconfig(args.kconfig, suppress_traceback=True) 63 print(kconf.load_config()) 64 65 for arg in args.assignments: 66 if "=" not in arg: 67 sys.exit("error: no '=' in assignment: '{}'".format(arg)) 68 name, value = arg.split("=", 1) 69 70 if name not in kconf.syms: 71 if not args.check_exists: 72 continue 73 sys.exit("error: no symbol '{}' in configuration".format(name)) 74 75 sym = kconf.syms[name] 76 77 if not sym.set_value(value): 78 sys.exit("error: '{}' is an invalid value for the {} symbol {}" 79 .format(value, kconfiglib.TYPE_TO_STR[sym.orig_type], 80 name)) 81 82 if args.check_value and sym.str_value != value: 83 sys.exit("error: {} was assigned the value '{}', but got the " 84 "value '{}'. Check the symbol's dependencies, and make " 85 "sure that it has a prompt." 86 .format(name, value, sym.str_value)) 87 88 print(kconf.write_config()) 89 90 91if __name__ == "__main__": 92 main() 93