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fix: match exclude_files against relative paths by yangfan-yf-yf · Pull Request #463 · cpplint/cpplint · GitHub

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fix: match exclude_files against relative paths - #463

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fix: match exclude_files against relative paths#463
yangfan-yf-yf wants to merge 2 commits into
cpplint:developfrom
yangfan-yf-yf:fix/exclude-files-relative-path

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yangfan-yf-yf commented Aug 9, 2026 •
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Fixes #254.

Summary

  • match each exclude_files expression against the target path relative to the CPPLINT.cfg that defines it
  • normalize path components to / on every platform
  • preserve same-directory matching, parent configuration traversal, and set noparent
  • document the relative-path behavior and its compatibility boundary

An anchored directory-only pattern such as ^bar$ should be written as ^bar/ when the intent is to exclude that subtree.

Validation

  • focused configuration tests: 7 passed
  • full test suite: 238 passed
  • Ruff 0.15.20 check and format check passed
  • Mypy, Pylint, Codespell, and git diff --check passed

coderabbitai Bot commented Aug 9, 2026 •
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📝 Walkthrough

Walkthrough

exclude_files patterns now match source paths relative to their CPPLINT.cfg, using forward slashes. Tests cover nested paths, inherited exclusions, and set noparent.

Changes

Relative exclude_files matching

Layer / File(s) Summary
Compute and apply relative exclusion paths
cpplint.py, CHANGELOG.rst		 cpplint.py builds configuration-relative paths, matches exclude_files against those paths, and reports the matching path and pattern. The changelog documents the behavior.
Validate configuration inheritance and matching
cpplint_unittest.py		 Tests cover exact, nested, and nonmatching patterns, parent exclusion inheritance, and set noparent.

Estimated code review effort: 3 (Moderate) | ~20 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name Status Explanation Resolution
Docstring Coverage ⚠️ Warning Docstring coverage is 14.29% which is insufficient. The required threshold is 80.00%. Write docstrings for the functions missing them to satisfy the coverage threshold.
✅ Passed checks (4 passed)
Check name Status Explanation
Linked Issues check ✅ Passed The changes implement relative-path exclude_files matching for subdirectory files and preserve nested configuration and set noparent behavior required by issue #254.
Out of Scope Changes check ✅ Passed The code, tests, and changelog changes directly support the relative-path exclude_files objective and contain no unrelated scope.
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed The title clearly and concisely describes the main change to match exclude_files patterns against relative paths.
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  • Create PR with unit tests

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yangfan-yf-yf marked this pull request as ready for review August 9, 2026 17:03
coderabbitai Bot reviewed Aug 9, 2026
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents 
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@cpplint.py`:
- Around line 270-273: Document in the exclude_files path-matching guidance in
cpplint.py (lines 270-273) that anchored directory patterns must be changed from
^bar$ to ^bar/. Add ("bar/baz.cc", "^bar$", True) to the relevant compatibility
test cases in cpplint_unittest.py (lines 7295-7302) to lock the behavior that
^bar$ does not exclude the bar subtree.
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Fix all unresolved CodeRabbit comments on this PR:

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ℹ️ Review info ⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 68156488-6931-42bb-9d53-40dde9ee4fd0

📥 Commits

Reviewing files that changed from the base of the PR and between 96db7ae and 5f7c736.

📒 Files selected for processing (3)
  • CHANGELOG.rst
  • cpplint.py
  • cpplint_unittest.py

Comment thread cpplint.py Outdated
PNHD approved these changes Aug 14, 2026
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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Re-reviewed current head db3dfc9. The implementation consistently matches exclude_files against the path relative to the defining CPPLINT.cfg, normalizes separators, preserves parent traversal and set noparent, and documents/tests the anchored-directory compatibility boundary (^bar$ vs ^bar/). The prior review finding about that boundary is addressed on this head. The PR reports 7 focused configuration tests and 238 full-suite tests passing, together with Ruff, Mypy, Pylint, Codespell, and git diff --check. LGTM.

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Allow exclude_files option in the config file to exclude a specific file in a subdirectory

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