find_all_xkb_names.py

#!/usr/bin/python

import os
import re


def find_xkb_names_in_file(path):
    """Return a set of all keys used in this xkb symbols file."""
    keys = set()
    with open(path) as f:
        for line in f:
            start = r'.*key.+<.+\['
            end = r'\].*'
            valid_characters = r'[0-9a-zA-Z_,\s]'
            match = re.match(f'{start}({valid_characters}+){end}', line)

            if match is None:
                continue

            match = re.sub('\s', '', match[1]).split(',')

            for key in match:
                if '0x' in key or len(key) == 0:
                    continue

                if re.match(r'^U[A-F0-9a-f]+$', key):
                    continue

                keys.add(key)

    return keys
            

def find_all_xkb_names():
    """Return a set of all keys used in xkb symbols files on this computer."""
    keys = set()

    for root, dirs, files in os.walk('/usr/share/X11/xkb/symbols'):
        for name in files:
            path = os.path.join(root, name)
            if 'key-mapper' in path:
                continue
            keys = keys.union(find_xkb_names_in_file(path))

    return keys


if __name__ == '__main__':
    print(find_all_xkb_names())