Atlas - savedefconfig.py
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1#!/usr/bin/env python3
2
3# Copyright (c) 2019, Ulf Magnusson
4# SPDX-License-Identifier: ISC
5
6"""
7Saves a minimal configuration file that only lists symbols that differ in value
8from their defaults. Loading such a configuration file is equivalent to loading
9the "full" configuration file.
10
11Minimal configuration files are handy to start from when editing configuration
12files by hand.
13
14The default input configuration file is '.config'. A different input filename
15can be passed in the KCONFIG_CONFIG environment variable.
16
17Note: Minimal configurations can also be generated from within the menuconfig
18interface.
19"""
20import argparse
21
22import kconfiglib
23
24
25def main():
26    parser = argparse.ArgumentParser(
27        formatter_class=argparse.RawDescriptionHelpFormatter,
28        description=__doc__)
29
30    parser.add_argument(
31        "--kconfig",
32        default="Kconfig",
33        help="Top-level Kconfig file (default: Kconfig)")
34
35    parser.add_argument(
36        "--out",
37        metavar="MINIMAL_CONFIGURATION",
38        default="defconfig",
39        help="Output filename for minimal configuration (default: defconfig)")
40
41    args = parser.parse_args()
42
43    kconf = kconfiglib.Kconfig(args.kconfig, suppress_traceback=True)
44    print(kconf.load_config())
45    print(kconf.write_min_config(args.out))
46
47
48if __name__ == "__main__":
49    main()
50
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