ast-grep

概要

ast-grep provides a powerful interface for structural code manipulation using Abstract Syntax Trees rather than simple text strings. This skill enables precise searching, linting, and automated rewriting while avoiding common pitfalls of regex-based search, such as matching inside comments or strings. It is particularly robust for Java development, offering specialized patterns for annotations, null safety, and the Stream API, while supporting over 20 other languages including TypeScript, Python, and Rust.

主な機能

• Structural code rewriting and automated refactoring workflows
• Java-specific specialized patterns for annotations, generics, and exception handling
• AST-based pattern matching using meta-variables and multi-node capture
• 2 GitHub stars
• Rule-based linting configuration using YAML for project-specific standards
• Multi-language support for over 20 languages including C++, Rust, Go, and Python

ユースケース

• Executing large-scale structural refactorings that require syntax awareness
• Creating custom linting rules to enforce project-specific architectural patterns
• Identifying security vulnerabilities or code smells that text-based grep cannot detect