fix_colr_font_revision.py

"""Set COLRv1 fontRevision from CBDT.

Used for bugfix, should fix to set properly on build instead.
"""

from fontTools import ttLib
from pathlib import Path
import sys


NAME_ID_VERSION = 5


def name(font, name_id):
    return ",".join(n.toUnicode() for n in font["name"].names if n.isUnicode() and n.nameID == name_id)


def main():
    colr_font_files = sorted(p for p in (Path(__file__).parent / "fonts").iterdir() if p.name.startswith("Noto-COLRv1"))

    for colr_font_file in colr_font_files:
        cbdt_font_file = colr_font_file.with_stem(colr_font_file.stem.replace("Noto-COLRv1", "NotoColorEmoji"))

        colr_font = ttLib.TTFont(colr_font_file)
        cbdt_font = ttLib.TTFont(cbdt_font_file)

        assert "CBDT" in cbdt_font
        assert "COLR" in colr_font

        colr_font["head"].fontRevision = cbdt_font["head"].fontRevision

        colr_font.save(colr_font_file)


if __name__ == '__main__':
  main()