jsparser is a JS tool that produces a GumTree compatible JS AST. It uses the awesome acorn module under the hood.
jsparser requires nodejs. To install it, just clone the repository and install the dependencies using
npm install
jsparser can be used as a standalone tool like this:
jsparser /path/to/script.py
If you plan to use it with gumtree, you need to put jsparser in your system's path.