CLI tool that searches your codebase for AST patterns using @babel-parser and esquery.
# For example, to find all `module.exports = `:
npx grep-ast 'AssignmentExpression > MemberExpression[object.name=module][property.name=exports]'
# Or to find all dynamic requires:
npx grep-ast 'CallExpression[callee.name=require]:not([arguments.0.type=StringLiteral])'To get an idea of the AST format you need to grep over, you can use AST Explorer. To match the default parser and parser options for grep-ast, choose JavaScript, babylon7, and then press the gear next to babylon7 to open its settings, and uncheck "estree".
Options:
--help Show help [boolean]
--version Show version number [boolean]
--selector CSS-like selector string to search AST for [string]
--patterns Space-separated list of glob patterns matching which files to
look in. Defaults to './**/*.{js,jsx}'. [string]
--ignore Comma-separated list of glob patterns to ignore [string]
--gitignore Whether to omit files listed in your .gitignore file(s).
Defaults to 'true'. [boolean] [default: true]
--encoding The encoding to read your files as. Defaults to 'utf-8'.
[string]
--parser The name of a parser module to use to parse your files. It
should have a parse function on it. Defaults to
'@babel/parser'. [string]
--parserOptions Options to pass to your parser's parse function, encoded as a
JSON string. [string]
--getLoc Function that receives an AST node and returns an object
describing the node's location. Defaults to 'node =>
node.loc'. [string]
MIT