nerd-fonts/bin/scripts/name_parser/query_name

#!/usr/bin/env python3
# coding=utf8
#
# Usually called via
# $ fontforge query_name fontfile.tff 2>/dev/null

import sys
import os.path
import fontforge

###### Some helpers

def get_sfnt_dict(font):
    """Extract SFNT table as nice dict"""
    return { k: v for l, k, v in font.sfnt_names }

###### Let's go!

if len(sys.argv) < 2:
    print('Usage: {} font_name [font_name ...]\n'.format(sys.argv[0]))
    sys.exit(1)

print('Examining {} font files'.format(len(sys.argv) - 1))
add_line = False

for filename in sys.argv[1:]:
    fullfile = os.path.basename(filename)
    fname = os.path.splitext(fullfile)[0]

    font = fontforge.open(filename, 1)
    sfnt = get_sfnt_dict(font)
    psname = font.fontname
    aname = font.fondname
    full = font.fullname
    fam = font.familyname
    font.close()

    sfnt_full =    sfnt['Fullname']
    sfnt_fam =     sfnt['Family']
    sfnt_subfam =  sfnt['SubFamily']
    sfnt_pfam =    sfnt['Preferred Family'] if 'Preferred Family' in sfnt else ''
    sfnt_psubfam = sfnt['Preferred Styles'] if 'Preferred Styles' in sfnt else ''
    sfnt_psname =  sfnt['PostScriptName'] if 'PostScriptName' in sfnt else ''
    sfnt_compat =  sfnt['Compatible Full'] if 'Compatible Full' in sfnt else None

    if add_line:
        print()
    else:
        add_line = True

    print('======== {} ========'.format(fname))
    print('SFNT Fullname      ID 4     {}'.format(sfnt_full))
    print('SFNT Family        ID 1     {}'.format(sfnt_fam))
    print('SFNT SubFamily     ID 2     {}'.format(sfnt_subfam))
    print('SFNT Pref Family   ID 16    {}'.format(sfnt_pfam))
    print('SFNT Pref Styles   ID 17    {}'.format(sfnt_psubfam))
    print('SFNT PS Name       ID 6     {}'.format(sfnt_psname))
    print('PS fontname                 {}'.format(psname))
    print('PS fullname                 {}'.format(full))
    print('PS familyname               {}'.format(fam))
    print('Compatible Fullname         {}'.format(sfnt_compat))
    print('fondname                    {}'.format(aname))