def _load(path: str) -> GSFont:
'''Load `.glyphspackage` bundle.
See [googlefonts/glyphsLib#643](https://github.com/googlefonts/glyphsLib/issues/643).
'''
with open(os.path.join(path, 'fontinfo.plist'), 'r') as fontinfo_plist:
fontinfo = fontinfo_plist.read()
with open(os.path.join(path, 'order.plist'), 'r') as order_plist:
order = Parser().parse(order_plist.read())
insert_pos = fontinfo.find('instances = (')
glyphs = ',\n'.join(Font._read_glyph(path, name) for name in order)
glyphs = f'glyphs = (\n{glyphs}\n);\n'
return glyphsLib.loads(fontinfo[:insert_pos] + glyphs + fontinfo[insert_pos:-1])
def assertParseWriteRoundtrip(self, filename):
with open(filename) as f:
expected = f.read().splitlines()
f.seek(0, 0)
font = glyphsLib.load(f)
actual = write_to_lines(font)
# Roundtrip again to check idempotence
font = glyphsLib.loads("\n".join(actual))
actual_idempotent = write_to_lines(font)
# Assert idempotence first, because if that fails it's a big issue
self.assertLinesEqual(
actual, actual_idempotent,
"The parser/writer should be idempotent. BIG PROBLEM!")
self.assertLinesEqual(
expected, actual,
"The writer should output exactly what the parser read")