Fastmod

fastmod Plugin

A fast partial replacement for codemod. Interactive tool for making fast, semi-automated substitutions across a codebase.

Commands

Code Replacement

• fastmod code replace — Search and replace across codebase

Utility

• fastmod _ _ — Passthrough to fastmod CLI

Usage Examples

• "Search and replace in codebase"
• "Bulk code refactoring"
• "Automated substitutions"
• "Codemod replacement"

Installation

brew install fastmod

Or via Cargo:

cargo install fastmod

Examples

# Simple replacement
fastmod code replace "oldFunction" "newFunction" --dir ./src

# Accept all changes
fastmod code replace "oldFunction" "newFunction" --dir ./src --accept-all

# Regex pattern
fastmod code replace "foo\\(bar\\)" "foo(baz)" --dir ./src

# Any fastmod command with passthrough
fastmod _ _ "old" "new" --dir ./src
fastmod _ _ "old" "new" --dir ./src --accept-all

Key Features

• Fast - High performance
• Regex - Regex support
• Interactive - Interactive mode
• Batch - Batch mode
• Dry-run - Preview changes
• Git - Git integration
• Files - File filtering
• Case - Case sensitivity
• Whole word - Word boundaries
• Codemod - Codemod alternative

Notes

• Great for bulk refactoring
• Use --accept-all for automation
• Supports regex patterns
• Preview before applying