javimosch ast-grep Plugin
AST-based code structural search, lint, and rewriting.
Commands
Search
ast-grep search run— Search using AST pattern
Rewrite
ast-grep rewrite run— Rewrite code using pattern and replacement
Lint
ast-grep lint run— Run linting rulesast-grep scan run— Scan directory with rules
Usage Examples
- "Find all usages of $A && $A() pattern in TypeScript"
- "Replace null coalescing patterns"
- "Lint the codebase for specific patterns"
- "Scan src directory for violations"
Installation
npm install --global @ast-grep/cli
# or
cargo install ast-grep
# or
brew install ast-grep
Examples
# Search for AST pattern
ast-grep --pattern 'const $X = $Y' --lang ts
# Rewrite code
ast-grep --pattern '$A && $A()' --lang ts --rewrite '$A?.()'
# Run lint
ast-grep lint
# Scan directory
ast-grep scan src/
Key Features
- Pattern looks like real code
- Supports JS, TS, Python, Rust, Go, Java, etc.
- Use
$VARas wildcard for AST nodes - YAML-based lint rules -批量 code rewriting