A Python script to set ufo2ft filters in UFOs, in order to run them on FontMake builds

add-ufo2ft-filters-to-ufos_in_dir.py

"""
  A script to set ufo2ft filters for all fonts in a directory.

  DIRECTIONS: Set up the dict below with filters you would like to use in your UFO builds. Then, run it in the command 
  line like this, replacing the <content surrounded by angle brackets> with relavent paths:
  
  python3 "<path_to_this_script>/add-ufo2ft-filters-to-ufos_in_dir.py" "<path_to_a_folder_containing_UFO_fonts>"
  
  See https://github.com/googlefonts/fontmake/blob/a4c83a0693ae7c629db9385a9e68d8641d85718e/USAGE.md#outline-filtering
  for more information.
  
  LICENSE: MIT license
"""

import sys
import os
from fontParts.world import *
import ufonormalizer

sourceFolderPath = sys.argv[1]

for fileName in os.listdir(sourceFolderPath):
	if fileName.endswith(".ufo"):
		ufoPath = os.path.join(sourceFolderPath, fileName)

		print(ufoPath)
		
		f = OpenFont(ufoPath, showInterface=False)

		f.lib["com.github.googlei18n.ufo2ft.filters"] = [
				{
				'name': 'decomposeTransformedComponents', 
				'pre': 1
				},
				{
				'name': 'flattenComponents', 
				'pre': 1
				},
				{
				'name': 'propagateAnchors', 
				'pre': 1
				},
		]

		f.save()

		ufonormalizer.normalizeUFO(ufoPath, writeModTimes=False)