fix: anchor branch names, exempt only git subjects, report config errors - #569
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The CC201 regex anchored only the start of each alternative, so any branch that merely began with an allowed name passed: "main-backup", "master2", "HEADless", and "develop-x" (with "develop" in allow_branch_names) were all accepted. Anchor every alternative at both ends so an allowed name must match the whole branch name; "PR-.+" stays a pattern, and branch types and configured names are now regex-escaped so a dot in a name means a dot. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
CC001 exempted anything starting with "Merge" or "fixup!", so author prose such as "Merged stuff into main", "Mergeable widgets" and "fixup!! nonsense" escaped the format check, while git's own 'Revert "..."', "squash! ..." and "amend! ..." subjects failed it even though allow_revert_commits defaults to true. Exempt exactly the prefixes git writes: "Merge ", 'Revert "', "fixup! ", "squash! " and "amend! " (trailing space or quote included). Whether such commits are allowed remains CC006/CC007/CC009's decision, and it matches the "Merge " / "fixup! " skip logic the subject rules already use. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
A parent config that could not be loaded was dropped without a word: a malformed "github:" shorthand, an unreachable URL, an unreadable local path, or invalid TOML in the parent (the last one was not caught for a fetched parent at all). Loading stays fail-open as documented, but every failure now prints one line to stderr naming the value and the reason and saying the local config is used on its own. Nothing goes to stdout, so --format json output stays parseable. Non-HTTPS URLs are refused with the same message rather than being treated as a missing local file. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
The "Warning: Invalid value for CCHK_..." message went to stdout, so `CCHK_SUBJECT_MAX_LENGTH=abc commit-check -m --format json` produced output that no JSON parser could read. Send it to stderr; the warning text and the skip-and-continue behaviour are unchanged. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
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📝 WalkthroughWalkthroughThe changes make parent configuration failures explicit while preserving fail-open behavior, route warnings to stderr, preserve JSON stdout, and tighten conventional-commit and branch-name regex handling. ChangesConfiguration and validation behavior
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to An HTTPS parent configuration can be redirected to an unencrypted download, allowing configuration policy to be changed in transit. Prevent redirect downgrades before merging parent configuration. Sequence Diagram(s)sequenceDiagram
participant LocalConfig
participant ConfigMerger
participant CLIOutput
LocalConfig->>ConfigMerger: parse invalid environment variable
ConfigMerger->>CLIOutput: write warning to stderr
ConfigMerger-->>LocalConfig: continue with configured values
LocalConfig->>CLIOutput: write JSON result to stdout
🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #569 +/- ##
==========================================
+ Coverage 98.78% 98.96% +0.17%
==========================================
Files 13 13
Lines 1809 1833 +24
==========================================
+ Hits 1787 1814 +27
+ Misses 22 19 -3 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Inline comments:
In `@commit_check/config.py`:
- Line 86: Update the URL-opening flow around urllib.request.urlopen to use a
redirect handler that rejects any redirect target not using HTTPS, while
preserving valid HTTPS requests and existing response parsing. Add a regression
test covering an HTTPS-to-HTTP redirect and asserting it is rejected.
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📒 Files selected for processing (8)
commit_check/config.pycommit_check/config_merger.pycommit_check/rule_builder.pytests/config_merger_test.pytests/config_test.pytests/engine_test.pytests/main_test.pytests/rule_builder_test.py
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urlopen follows an HTTPS-to-HTTP redirect by default, so a parent config fetched through inherit_from could be swapped for a cleartext download on the way to being merged into the policy. The fetch now goes through an opener whose redirect handler refuses any target that is not https://, and the refusal is reported like any other load failure. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
Merging this PR will degrade performance by 15.74%
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| Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|
| ❌ | test_load_from_url_network_error |
1.2 ms | 1.5 ms | -20.11% |
| ❌ | test_load_from_url_http_error |
1.2 ms | 1.5 ms | -19.85% |
| ❌ | test_inherit_from_url_failure_is_ignored |
1.2 ms | 1.5 ms | -19.41% |
| ❌ | test_inherit_from_http_url_is_rejected |
1.2 ms | 1.4 ms | -13.26% |
| ❌ | test_inherit_from_nonexistent_file_is_ignored |
344.1 µs | 385.1 µs | -10.63% |
| ❌ | test_inherit_from_key_is_removed_from_result |
336.7 µs | 376.3 µs | -10.54% |
| 🆕 | test_load_from_url_rejects_non_https |
N/A | 1.4 ms | N/A |
| 🆕 | test_revert_subject_passes_under_the_default_config |
N/A | 380.3 µs | N/A |
| 🆕 | test_json_output_survives_an_invalid_env_var |
N/A | 10.7 ms | N/A |
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Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.
Comparing claude/submit-patch-commit-check-42ac3i (925a842) with main (2d78b99)
Footnotes
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121 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩
Escaping every allowed branch type on each rule build cost about a third of RuleBuilder's time (twenty-one names under the default config). The escaped alternation is now computed once per tuple of names and cached, so a build with the default config does no escaping at all. The three branch-name benchmarks go back to asserting the regex's shape; TestBranchRegexIsAnchored already exercises the engine. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
build_opener at module import made every import of commit_check.config (and the two tests that reload it) pay for handlers most runs never use. The opener is now created the first time a parent config is fetched. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_018xYa7m3qup5wyN5MaXFgf6
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CodSpeed status after the two performance commits:
Six benchmarks remain flagged, all in
Every one of these is the Generated by Claude Code |
#569 anchored every alternative of the CC201 regex, which fixed the real bug (a branch merely starting with an allowed name passed: "main-backup" was accepted as "main"), but it also regex-escaped the configured types and names. That turned values that had always been patterns into literals. commit-check-action's own commit-check.toml is one of them: [branch] allow_branch_names = ["create-pull-request/.+"] added in commit-check-action#231 to let peter-evans/create-pull-request open branches (commit-check-action#225). Escaped, it can only ever match a branch literally named "create-pull-request/.+", so every repository using that recipe would start failing CC201 on a CLI upgrade. The built-in "PR-.+" is a pattern for the same reason, and was never escaped. Interpolate the configured types and names as written, as before #569, and keep the anchoring: "create-pull-request/update-deps" passes again while "main-backup" and "develop-x" stay rejected. Escaping was also the reason the alternation had to be cached, so the lru_cache helper goes with it. The README now says an entry is a regex matched against the whole type or branch name, which is what the code has always done.
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What
Four fixes from the cross-repository review, one commit each, every one with a regression test. Three of them are cases where the CLI reported a pass or exit 0 without having checked what the user thought it checked.
$, somain-backup,master2,HEADlessanddevelop-xall passed. Allowed types andallow_branch_namesare nowre.escaped;PR-.+stays a pattern.(Merge).*|(fixup!.*)exemption letMerged stuff into mainandfixup!! nonsensethrough while rejectingRevert "feat: init"under the default config (soallow_revert_commitsnever got a say). The exemption is nowMerge,Revert ",fixup!,squash!,amend!, and CC006/CC007/CC009 remain the policy switches for whether those commits are allowed.inherit_fromfailures are reported. A malformedgithub:shorthand, an unreachable URL, an unreadable local parent or invalid TOML in the parent all fell back to the local config with exit 0 and no output. Behaviour is still fail-open, as documented, but one line now goes to stderr:⊘ inherit_from "…" could not be loaded: <reason>; continuing with the local config.http://values are refused with a reason rather than treated as a missing file.CCHK_*warnings go to stderr, so--format jsonstays parseable.Behaviour changes worth a release note
Mergeorfixup!that is not git's exact prefix is now held to the Conventional Commits format;Revert "…",squash!andamend!subjects now pass CC001.No new git subprocess calls.
pytest: 823 passed (plus the pre-existing root-only permission test).pre-commit run --all-files: all hooks pass.🤖 Generated with Claude Code
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