font-patcher: Fix behavior when trying to patch non-font files #1648
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[why]
When the file specified to be patched is not a font file the patcher run
errors out with an out of index runtime error:
Traceback (most recent call last):
File "/home/fini/extra/git/nerd-fonts/font-patcher", line 2155, in <module>
main()
File "/home/fini/extra/git/nerd-fonts/font-patcher", line 2147, in main
patcher.generate(sourceFonts)
File "/home/fini/extra/git/nerd-fonts/font-patcher", line 415, in generate
sourceFont = sourceFonts[0]
~~~~~~~~~~~^^^
IndexError: list index out of range
[how]
Do not assume that the specified file will be a font file but rather
check if fontforge detects a font in the file and error out if there is
no font found.
Fixes: #1647
Reported-by: Kristopher James Kent <[email protected]>
Signed-off-by: Fini Jastrow <[email protected]>
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[why]
When the file specified to be patched is not a font file the patcher run errors out with an out of index runtime error:
[how]
Do not assume that the specified file will be a font file but rather check if fontforge detects a font in the file and error out if there is no font found.
Fixes: #1647
Reported-by: Kristopher James Kent [email protected]
Requirements / Checklist
Issue number where discussion took place: #xxx
What does this Pull Request (PR) do?
Prevent a runtime error in certain situations and instead prints an understandable explanation why processing can not continue.
How should this be manually tested?
Any background context you can provide?
What are the relevant tickets (if any)?
Screenshots (if appropriate or helpful)