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font-patcher: Check if glyph source is available

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[why]
When users just download the script (and not the source glyphs) the
script fails with an obscure error message.

[how]
Check if the glyphdir exists at all. If not give a hint to download the
glyphs.

Check if the individual glyph font exists and is readable. Bail out if
not.

[note]
Cherry picked, was part of #741

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>
This commit is contained in:
Fini Jastrow 2021-12-27 15:41:56 +01:00
parent 7cda326515
commit f97d729b34
1 changed files with 10 additions and 0 deletions
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10
font-patcher
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@ -218,6 +218,10 @@ class font_patcher:
PreviousSymbolFilename = ""
symfont = None
if not os.path.isdir(self.args.glyphdir):
sys.exit("{}: Can not find symbol glyph directory {} "
"(probably you need to download the src/glyphs/ directory?)".format(projectName, self.args.glyphdir))
for patch in self.patch_set:
if patch['Enabled']:
if PreviousSymbolFilename != patch['Filename']:
@ -225,6 +229,12 @@ class font_patcher:
if symfont:
symfont.close()
symfont = None
if not os.path.isfile(self.args.glyphdir + patch['Filename']):
sys.exit("{}: Can not find symbol source for '{}'\n{:>{}} (i.e. {})".format(
projectName, patch['Name'], '', len(projectName), self.args.glyphdir + patch['Filename']))
if not os.access(self.args.glyphdir + patch['Filename'], os.R_OK):
sys.exit("{}: Can not open symbol source for '{}'\n{:>{}} (i.e. {})".format(
projectName, patch['Name'], '', len(projectName), self.args.glyphdir + patch['Filename']))
symfont = fontforge.open(os.path.join(self.args.glyphdir, patch['Filename']))
# Match the symbol font size to the source font size