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import sys
import os
import re
from fontTools.feaLib.parser import Parser
from fontTools.feaLib.ast import FeatureFile
from ufo2ft.featureWriters.markFeatureWriter import MarkFeatureWriter
from defcon import Font
if len(sys.argv) not in [3, 4]:
sys.exit("parse-features.py expected exactly 2 arguments, input and "
"output feature files and 1 optional argument with style name "
"being processed for replacing that string in the feature file.")
in_path = sys.argv[1]
out_path = sys.argv[2]
if len(sys.argv) == 4:
stylename = sys.argv[3]
else:
# e.g. "Bold" in "sources/masters/Rasa-Bold.ufo"
stylename = re.search(r"Rasa\-([A-z]+)", out_path).group(1)
features = ""
# Generate markClass statements and prepend them
font = Font(out_path)
markClassDefinitions = []
feaFile = FeatureFile() # A holder for the generated mark features
markWriter = MarkFeatureWriter()
markWriter.write(font, feaFile)
markFeatures = feaFile.asFea() # Get the generated mark features
reMarkClass = re.compile(r"markClass.*;")
markClassDefinitions = reMarkClass.findall(
markFeatures) # Save all the markClass definitions
# Read the input feature file
with open(in_path, "r") as input_fea:
# Replace $markClasses with the generated markClassDefinitions
if markClassDefinitions != []:
features = input_fea.read().replace(
"$markClasses", "\n".join(markClassDefinitions))
else:
features = input_fea.read().replace("$markClasses", "")
if stylename:
# Replace the matra I style-based include path for each style
print("Replacing $stylename with '%s' if found in feature file" %
stylename)
features = features.replace("$stylename", stylename)
# Write to a temporary file, which we can parse and expand all includes
with open("production/features/tmp.fea", "w") as tmp:
tmp.write(features)
parser = Parser("production/features/tmp.fea")
parsed = parser.parse()
os.remove("production/features/tmp.fea")
# Write the parsed and substituted features to the UFO features
with open(out_path + "/features.fea", "w") as fea:
fea.write(str(parsed))
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