Server GMA Cleanup

Python script to detect and remove unused downloaded addons from Gmod servers to free up space. Requires Python 3.6+ as well as the requests, humanfriendly, and vdf modules. Works on both Windows and Linux. The script works by comparing addons in a specified workshop collection against the files located in the garrysmod/cache/srcds and steam_cache/content/4000 folders. Any addons found that are not in the collection will be removed. The script also removes addon entries from the appworkshop_4000.acf file to prevent errors while downloading a previously deleted addon.

Usage

This script takes two arguments: Workshop collection ID and file path to the root directory of the server. If an argument isn't specified, it will prompt the user for it before continuing.

Notes

• The specified workshop collection MUST be set to public. Setting the collection to unlisted won't work as the Steam web API will return an empty list.
• This only works on dedicated servers that use a workshop collection to automatically download addons. If you need to cleanup unused addons for the actual game, use the menu_cleanupgmas console command.