The script uses the GeoScript Groovy API. I've added the groovy plugin files from the nightly build server to the WEB-INF/lib folder on my local machine, but I'm not getting the script directory appear in the GeoServer GUI after I restart. The docs only outline the process for installing the Python script extension, not the Groovy one.
I'm using GeoServer on my local machine which runs Windows 10. Is there something I'm missing to enable the scripting extension?