Raise an exception when find_tex_file fails to find a file. #21356
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timhoffm
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Oct 14, 2021
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I'm slightly worried on the API change. There might be users out there using find_tex_file to check if a package is installed.
The more defensive approach would be:
- If
find_tex_filedoesn't find a file it issues a warning that it will fali in the future. But it still returns '' for now. - Tempoarily we add a function
def _find_tex_file_or_raise(filename): with.warnings.catch_warnings(): warnings.filter(...) tex_file = find_tex_file(filename) if not tex_file: raise FileNotFoundError(...) return tex_file - and replace all internal usages with this function.
This would give nice error messages for internal problems but still gives find_tex_file users the opportunity to prepare for the API change.
|
OK, switch to warning. |
timhoffm
approved these changes
Oct 14, 2021
QuLogic
reviewed
Oct 15, 2021
The exception message is clearer for end users than downstream callers failing to `open()` a file named `""`. Also update the function's docstring. _tfmfile now never returns None (an exception would have been raised earlier by find_tex_file), so remove the corresponding branch.
QuLogic
approved these changes
Oct 15, 2021
tacaswell
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this pull request
Oct 20, 2021
Raise an exception when find_tex_file fails to find a file.
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The exception message is clearer for end users than downstream callers
failing to
open()a file named"".Also update the function's docstring.
_tfmfile now never returns None (an exception would have been raised
earlier by find_tex_file), so remove the corresponding branch.
From a quick look, #21354 seems to arise from a missing
pdftex.map;this patch would have made the error clearer.
PR Summary
PR Checklist
pytestpasses).flake8on changed files to check).flake8-docstringsand runflake8 --docstring-convention=all).doc/users/next_whats_new/(follow instructions in README.rst there).doc/api/next_api_changes/(follow instructions in README.rst there).