gritql

AST-based code transformation safely renames methods across multiple files by matching syntax tree patterns instead of text, ensuring syntax correctness. You preview all changes in dry-run mode before applying them to your codebase.

API migration across a large codebase is handled through AST-aware pattern matching that identifies usage and transforms it safely. A preview-first workflow lets you review all proposed changes before applying them.

AST pattern matching for code refactoring works by parsing code into abstract syntax trees and applying transformations to the tree structure. This avoids brittle text replacements and enforces syntax correctness across supported languages.

Previewing code transformations before applying them is a core requirement of this workflow. You run transformations in dry-run mode to review resulting changes, ensuring safe multi-file refactors before committing.

ast-grep works with gritql for search-then-transform workflows by pairing syntax-aware search with AST-based transformations. This combination enforces a preview step prior to applying transformations across files.

AST transformations avoid the limitations of find and replace by understanding code syntax structurally, preventing broken syntax from text replacements. They enforce preview-first workflows to safely modernize patterns across files.