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from fontTools.ttLib import TTFont
from fontTools.feaLib.builder import addOpenTypeFeatures, Builder
from fontTools.feaLib.error import FeatureLibError
from fontTools import configLogger
from fontTools.misc.cliTools import makeOutputFileName
import sys
import argparse
import logging
log = logging.getLogger("fontTools.feaLib")
def main(args=None):
"""Add features from a feature file (.fea) into a OTF font"""
parser = argparse.ArgumentParser(
description="Use fontTools to compile OpenType feature files (*.fea)."
)
parser.add_argument(
"input_fea", metavar="FEATURES", help="Path to the feature file"
)
parser.add_argument(
"input_font", metavar="INPUT_FONT", help="Path to the input font"
)
parser.add_argument(
"-o",
"--output",
dest="output_font",
metavar="OUTPUT_FONT",
help="Path to the output font.",
)
parser.add_argument(
"-t",
"--tables",
metavar="TABLE_TAG",
choices=Builder.supportedTables,
nargs="+",
help="Specify the table(s) to be built.",
)
parser.add_argument(
"-d",
"--debug",
action="store_true",
help="Add source-level debugging information to font.",
)
parser.add_argument(
"-v",
"--verbose",
help="increase the logger verbosity. Multiple -v " "options are allowed.",
action="count",
default=0,
)
parser.add_argument(
"--traceback", help="show traceback for exceptions.", action="store_true"
)
options = parser.parse_args(args)
levels = ["WARNING", "INFO", "DEBUG"]
configLogger(level=levels[min(len(levels) - 1, options.verbose)])
output_font = options.output_font or makeOutputFileName(options.input_font)
log.info("Compiling features to '%s'" % (output_font))
font = TTFont(options.input_font)
try:
addOpenTypeFeatures(
font, options.input_fea, tables=options.tables, debug=options.debug
)
except FeatureLibError as e:
if options.traceback:
raise
log.error(e)
font.save(output_font)
if __name__ == "__main__":
sys.exit(main())
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