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⚡ Bolt: Optimize regex replacement in template init script #152

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⚡ Bolt: Optimize regex replacement in template init script #152

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5 changes: 3 additions & 2 deletions scripts/init.py
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Original file line number Diff line number Diff line change
Expand Up @@ -134,8 +134,9 @@ def update_file(filepath: str, file_replacements: list[tuple[re.Pattern, str]]):
return
new_content = content
for pattern, replacement in file_replacements:
# Use a lambda for replacement to avoid regex backreference injection
new_content = pattern.sub(lambda _, r=replacement: r, new_content)
# Performance Optimization: Escape backslashes in replacement string so re.sub handles
# it directly in C without invoking a Python lambda function per match or risking Ruff B023.
new_content = pattern.sub(replacement.replace("\\", "\\\\"), new_content)

if new_content != content:
path.write_text(new_content)
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