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#!/usr/bin/env python3
# Pre-generates the expected output subset files (via fonttools) for
# specified subset test suite(s).
import os
import sys
import shutil
import io
import re
import tempfile
from difflib import unified_diff
from fontTools.ttLib import TTFont
from subprocess import check_call
from subset_test_suite import SubsetTestSuite
def usage():
print("Usage: generate-expected-outputs.py hb-subset <test suite file> ...")
def strip_check_sum (ttx_string):
return re.sub ('checkSumAdjustment value=["]0x([0-9a-fA-F])+["]',
'checkSumAdjustment value="0x00000000"',
ttx_string, count=1)
def generate_expected_output(input_file, unicodes, profile_flags, output_directory, font_name):
fonttools_path = os.path.join(tempfile.mkdtemp (), font_name)
args = ["fonttools", "subset", input_file]
args.extend(["--drop-tables+=DSIG",
"--drop-tables-=sbix",
"--unicodes=%s" % unicodes,
"--output-file=%s" % fonttools_path])
args.extend(profile_flags)
check_call(args)
with io.StringIO () as fp:
with TTFont (fonttools_path) as font:
font.saveXML (fp)
fonttools_ttx = strip_check_sum (fp.getvalue ())
harfbuzz_path = os.path.join(tempfile.mkdtemp (), font_name)
args = [
hb_subset,
"--font-file=" + input_file,
"--output-file=" + harfbuzz_path,
"--unicodes=%s" % unicodes,
"--drop-tables+=DSIG",
"--drop-tables-=sbix"]
args.extend(profile_flags)
check_call(args)
with io.StringIO () as fp:
with TTFont (harfbuzz_path) as font:
font.saveXML (fp)
harfbuzz_ttx = strip_check_sum (fp.getvalue ())
if harfbuzz_ttx != fonttools_ttx:
for line in unified_diff (fonttools_ttx.splitlines (1), harfbuzz_ttx.splitlines (1), fonttools_path, harfbuzz_path):
sys.stdout.write (line)
sys.stdout.flush ()
raise Exception ('ttx for fonttools and harfbuzz does not match.')
output_path = os.path.join(output_directory, font_name)
shutil.copy(harfbuzz_path, output_path)
args = sys.argv[1:]
if not args:
usage()
hb_subset, args = args[0], args[1:]
if not args:
usage()
for path in args:
with open(path, mode="r", encoding="utf-8") as f:
test_suite = SubsetTestSuite(path, f.read())
output_directory = test_suite.get_output_directory()
print("Generating output files for %s" % output_directory)
for test in test_suite.tests():
unicodes = test.unicodes()
font_name = test.get_font_name()
print("Creating subset %s/%s" % (output_directory, font_name))
generate_expected_output(test.font_path, unicodes, test.get_profile_flags(),
output_directory, font_name)
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