fix: prevent PR review summary exceeding 65535 len

[2bndy5]

resolves #75

This simply focuses on the length of the patch, because all other parts of the PR review summary will fit under 65535 characters without the patch added.

Summary by CodeRabbit

• Bug Fixes

  • Improved handling of large patch content in review comments. When patch content exceeds size limits, a "too large to include" message is displayed instead of attempting to embed the full content.

• Tests

  • Added test coverage for extremely large patch content scenarios.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Repository UI (base), Organization UI (inherited)

Review profile: CHILL

Plan: Pro

Run ID: e32cc349-30ce-44cc-8d2f-889e719d99a3

📥 Commits

Reviewing files that changed from the base of the PR and between 7810388 and fe1d942.

📒 Files selected for processing (1)

• cpp-linter/src/clang_tools/mod.rs

📝 Walkthrough

Walkthrough

Replaces the hardcoded 65535 literal with u16::MAX in RestClient::post_feedback and adds a length guard in ReviewComments::summarize that computes the prospective summary size and either inserts a truncation message or embeds the full patch. Tests are updated accordingly, including a new regression test for the truncation path.

Changes

Patch truncation and u16::MAX constant alignment

Layer / File(s)	Summary
Length guard in summarize and u16::MAX in post_feedback cpp-linter/src/clang_tools/mod.rs, cpp-linter/src/rest_client.rs	ReviewComments::summarize now builds separate prefix/suffix strings for the diff block, computes body.len() + USER_OUTREACH.len() + patch_size, logs a warning, and inserts a truncation message if u16::MAX is exceeded; otherwise the full patch is embedded. RestClient::post_feedback replaces the 65535 literal with u16::MAX in both the length comparison and the max_len argument to make_comment.
Test constant and truncation regression test cpp-linter/src/clang_tools/mod.rs, cpp-linter/src/rest_client.rs	Extracts a module-level PSEUDO_VERSION constant reused by summarize_reused_reviews. Adds summary_len_truncated which builds an oversized full_patch and asserts the truncation notice appears in the output. Updates the rest_client stress-test loop bound from 65535 to u16::MAX.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• cpp-linter/cpp-linter-rs#101: Touches ReviewComments::summarize logic around iterating full_patch, directly related to the truncation path added in this PR.
• cpp-linter/cpp-linter-rs#353: Modifies RestClient::post_feedback and the large-comment handling at the same call sites updated in this PR.
• cpp-linter/cpp-linter-rs#358: Refactors ReviewComments data model and full_patch production in mod.rs, directly preceding the truncation guard added here.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The PR title accurately describes the main change: preventing PR review summary from exceeding 65535 character limit by defensive handling of large patches.
Linked Issues check	✅ Passed	Code changes directly address issue #75: implement length validation logic to prevent patches exceeding 65535 characters and emit warnings when limits are exceeded.
Out of Scope Changes check	✅ Passed	All changes are directly related to the stated objectives: length checks and handling of large patches in review summaries and REST API comment limits.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.42%. Comparing base (edd66db) to head (fe1d942).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #370      +/-   ##
==========================================
+ Coverage   92.35%   92.42%   +0.07%     
==========================================
  Files          23       23              
  Lines        3597     3631      +34     
==========================================
+ Hits         3322     3356      +34     
  Misses        275      275              

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