Revert "add_lang_ext_support_to_diff"

[Saga4]

Reverts #1858

[claude]

Claude finished @Saga4's task in 2m 46s —— View job

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PR Review Summary

• Triage
• Lint & type check
• Resolve stale threads
• Code review
• Duplicate detection
• Test coverage
• Merge optimization PRs

Prek Checks

No changed source files to lint (the PR only removes lines). Prek reported no issues.

Code Review

This PR reverts #1858, which added two lines to codeflash/code_utils/git_utils.py:

# Removed by this revert:
from codeflash.languages.registry import get_supported_extensions   # line 16
supported_extensions = set(get_supported_extensions())              # line 42 in get_git_diff()

Behavioral change: Before #1858, get_git_diff filtered diffs to only the current language's file extensions (current_language_support().file_extensions, line 31). PR #1858 changed it to filter by all supported language extensions (get_supported_extensions()), but this created a bug: line 31's assignment was silently dead code because line 42 immediately overrode it.

The revert is correct and clean — removing lines 16 and 42 restores the original behavior where only the current language's extensions are tracked. Line 31 (supported_extensions = current_language_support().file_extensions) was always present and is now operative again.

No bugs, no security issues, no breaking API changes.

Duplicate Detection

No duplicates detected. The removed import was only used in get_git_diff.

Test Coverage

tests/test_git_utils.py exists but does not test the extension-filtering logic in get_git_diff. No coverage change from this revert (lines removed, not added).

Merged Optimization PRs

• Merged ⚡️ Speed up method InitDecorator.visit_ClassDef by 10% in PR #1860 (fix/attrs-init-instrumentation) #1867 (⚡️ Speed up InitDecorator.visit_ClassDef by 10%) — all CI checks passed.

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Last updated: 2026-03-18