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font-patcher: Give meaningful error messages on trivial open fails

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[why]
When the font file is not existing the message we get is either
unreadable or missleading (at least for normal users).

[how]
Explicitely state why we can not open a font file, at least in the cases
where we can.

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
This commit is contained in:
Fini Jastrow 2021-11-30 07:58:12 +01:00
parent ab6fa3c562
commit 3384fc302c
1 changed files with 4 additions and 0 deletions
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font-patcher
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@ -51,6 +51,10 @@ class font_patcher:
self.extension = ""
self.setup_arguments()
self.config = configparser.ConfigParser(empty_lines_in_values=False, allow_no_value=True)
if not os.path.isfile(self.args.font):
sys.exit("{}: Font file does not exist: {}".format(projectName, self.args.font))
if not os.access(self.args.font, os.R_OK):
sys.exit("{}: Can not open font file for reading: {}".format(projectName, self.args.font))
try:
self.sourceFont = fontforge.open(self.args.font)
except Exception: