AST-GREPFind Code by Syntax ast-grep(sg) is a fast and polyglot tool for code structural search, lint, rewriting at large scale. Search and Rewriteast-grep is a code tool for structural search and replace. It is like syntax-aware grep/sed! You can write code patterns to locate and modify code, based on AST, in thousands of files, interactively. sg -p '$A && $A()' -r '$A?.()' Scan as Linterast-grep