Case-Aware Transformations

Renamify’s most powerful feature is its ability to understand and convert between different naming conventions automatically.

Supported Case Styles

When you provide a search and replace pattern, Renamify automatically applies the transformation to all detected case variants:

Default Case Styles

• snake_case → old_name → new_name
• kebab-case → old-name → new-name
• camelCase → oldName → newName
• PascalCase → OldName → NewName
• SCREAMING_SNAKE_CASE → OLD_NAME → NEW_NAME

Additional Case Styles

• Title Case → Old Name → New Name
• Train-Case → Old-Name → New-Name
• dot.case → old.name → new.name

Contextual Separator Coercion

Renamify includes intelligent contextual separator coercion that adapts the replacement style based on the surrounding code context:

• Context-aware replacement: renamify_core::Engine becomes renamed_renaming_tool_core::Engine (snake_case context)
• Path-aware: src/renamify/main.rs becomes src/renamed-renaming-tool/main.rs (kebab-case for paths)
• URL-aware: https://github.com/user/renamify becomes https://github.com/user/renamed-renaming-tool
• Module-aware: renamify::core::apply() becomes renamed_renaming_tool::core::apply()

The coercion analyzes the immediate context around each match to determine the most appropriate separator style, making renaming feel more natural and reducing manual corrections.

Controlling Case Styles

Use Only Specific Styles

# Only handle camelCase and snake_case
renamify plan old_name new_name --only-styles camel,snake

Exclude Specific Styles

# Use defaults but exclude SCREAMING_SNAKE_CASE
renamify plan old_name new_name --exclude-styles screaming-snake

Include Additional Styles

# Add Title Case and dot.case to the defaults
renamify plan old_name new_name --include-styles title,dot

Style Names Reference

Style Name	Example
snake	snake_case
kebab	kebab-case
camel	camelCase
pascal	PascalCase
screaming-snake	SCREAMING_SNAKE_CASE
title	Title Case
train	Train-Case
dot	dot.case

Examples

Basic Case Transformation

renamify plan getUserName fetchUserProfile

This will find and replace:

• getUserName → fetchUserProfile
• get_user_name → fetch_user_profile
• GetUserName → FetchUserProfile
• GET_USER_NAME → FETCH_USER_PROFILE
• get-user-name → fetch-user-profile

Custom Style Selection

# Only transform camelCase and PascalCase (common in TypeScript/React)
renamify plan oldComponent newComponent --only-styles camel,pascal

# Exclude SCREAMING_SNAKE_CASE (maybe it's used for constants you don't want to change)
renamify plan apiKey secretKey --exclude-styles screaming-snake

Including Extra Styles

# Include title case for documentation or UI text
renamify plan user_profile account_settings --include-styles title

This would also transform:

• User Profile → Account Settings

Boundary Detection

Renamify is smart about word boundaries to avoid partial matches:

✅ Good matches:

• getUserName() - function call
• const getUserName - variable declaration
• getUserName: - object property
• get_user_name.py - filename

❌ Avoided:

• getUserNameFromAPI - part of a longer identifier
• prefixgetUserName - not at word boundary