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fix(diff): compare bad file extensions case-insensitively - #3103
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IsmaelMartinez merged 1 commit intoSep 7, 2026
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is_valid_file() ended with `filename.split('.')[-1] not in bad_extensions`
(pr_agent/algo/language_handler.py:35), and every entry of
bad_extensions.default in pr_agent/settings/language_extensions.toml is
spelled in lower case. A file named logo.SVG, report.CSV or photo.JPG was
therefore treated as reviewable while the identical lower-case name was
filtered out. SVG and CSV are text, so those diffs are real and spend the
token budget the source files need. Every git provider filters through this
one function, so the leak was not provider-specific.
Lower-case both sides of the extension comparison, and add
tests/unittest/test_bad_extension_case.py covering uppercase and mixed-case
extensions, the unchanged lower-case behaviour, files that must still be
reviewed, and a user-configured bad_extensions entry in either casing.
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Thanks, and welcome. First direct test is_valid_file has had, and it goes red on main.
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What
pr_agent/algo/language_handler.py: lower-case both sides of the extension comparison inis_valid_file(), sobad_extensionsmatches whatever casing a repository actually uses.tests/unittest/test_bad_extension_case.py: 15 new tests covering uppercase and mixed-case extensions, the unchanged lower-case behaviour, files that must still be reviewed, a user-suppliedbad_extensionsentry in either casing, andfilter_bad_extensions().Why
is_valid_file()ended withreturn filename.split('.')[-1] not in bad_extensions(pr_agent/algo/language_handler.py:35), and every entry ofbad_extensions.defaultinpr_agent/settings/language_extensions.tomlis spelled in lower case. The comparison only ever matched a lower-case extension, so the same file was filtered or not depending on how its name happens to be capitalised.On
main:That is not only a cosmetic mismatch, because several of the filtered types are text rather than binary. GitHub and GitLab return a real patch for
.SVGand.CSV, so an uppercase-named one survives the filter, reachessort_files_by_main_languages(), and lands in the diff sent to the model, taking token budget away from the source files the review is about..JPGand.ZIPfiles stay in the file list for the same reason. Every provider filters through this one function, so this is not provider-specific:github_provider.py:318,gitlab_provider.py:831,bitbucket_provider.py:323,bitbucket_server_provider.py:283,gitea_provider.py:194and:590,azuredevops_provider.py:555and:807,codecommit_provider.py:139.Only the extension comparison changed. The auto-generated lockfile names and the
.min.jsstyle suffixes just above it are untouched, and no uppercase extension inlanguage_extension_map_org(.C,.H,.E,.ML,.tmThemeand friends) collides with abad_extensionsentry once lower-cased, so no language loses files to this.Testing
PYTHONPATH=. uv run pytest tests/unittest/test_bad_extension_case.py -qon this branch: 15 passed. With only thelanguage_handler.pychange reverted: 8 failed, 7 passed, the 7 passing ones being the cases that pin the existing behaviour.PYTHONPATH=. uv run pytest tests/unittest -q: 3738 passed, 1 skipped, 1 xfailed in 164s.uv run ruff check pr_agent/algo/language_handler.py tests/unittest/test_bad_extension_case.py: All checks passed.uv run pre-commit run --files pr_agent/algo/language_handler.py tests/unittest/test_bad_extension_case.py: every applicable hook passed.