ast-grep
Like grep, but more powerful than you can possibly imagine.
Search your JavaScript files for patterns based on AST shape, rather than substrings or regular expressions.
Install
With yarn:
yarn global add ast-grepWith npm:
npm install --global ast-grepUsage
$ ast-grep --help
Options:
--anonymous, -a Ignore all names in the AST [boolean]
--file, -f Load pattern from a file [string]
--help Show help [boolean]
--version Show version number [boolean]
Examples:
ast-grep -a 'fn()' file.js Find all no-arg function calls in
'file.js'.
ast-grep -f pattern.js '**/*.js' Match the pattern in 'pattern.js' across
all JS files.
echo 'foo' | ast-grep 'pattern' Match 'pattern' on standard input.On standard in:
$ echo 'code();' | ast-grep 'code'
code();
$ ast-grep 'foo()' < file.js
foo();On a set of files:
$ ast-grep 'yield* foo();' '**/*.js'FAQ
Q. But @azz, grep stands for Global Regular Expression Print, this tool doesn't use Regular Expressions!
A. I know, but gastp doesn't sound great.