def _loadFeatureWriters(parser, specs):
feature_writers = []
for s in specs:
if s == "None":
# magic value that means "don't generate any features!"
return []
try:
feature_writers.append(loadFeatureWriterFromString(s))
except Exception as e:
parser.error("Failed to load --feature-writer:\n {}: {}".format(
type(e).__name__, e))
return feature_writers
def test_loadFeatureWriterFromString_valid(spec, FontClass):
writer = loadFeatureWriterFromString(spec)
assert writer.tableTag in {"GSUB", "GPOS"}
assert callable(writer.write)
logging.basicConfig(level=logging.INFO)
parser = argparse.ArgumentParser(
description="Apply feature writers to a UFO file")
parser.add_argument("--output",
"-o",
metavar="OUTPUT",
help="output file name")
parser.add_argument("ufo", metavar="UFO", help="UFO file")
parser.add_argument(
"writers",
metavar="WRITER",
nargs="*",
help="list of feature writers to enable",
)
args = parser.parse_args()
if not args.output:
args.output = makeOutputFileName(args.ufo)
ufo = loader(args.ufo)
writers = [loadFeatureWriterFromString(w) for w in args.writers]
compiler = FeatureCompiler(ufo, featureWriters=writers or None)
compiler.setupFeatures()
buf = StringIO()
compiler.writeFeatures(buf)
ufo.features.text = buf.getvalue()
logger.info("Written on %s" % args.output)
ufo.save(args.output)
