We've recently discovered that Xcode Server (i.e. a Bot) will keep all past integrations. (We discovered this as the builds started failing and we realized the CI server was completely out of disk space).
How can you configure a bot (or the server in general) to only keep the last n integrations? Or even the last n days?
If there is no built-in setting, is there a way to accomplish this via a cron job that doesn't have to use the unofficial XCode Server API?
The current max disk size is a ratio of 0.75 of the capacity (if I understand the output well). You can see it for yourself if you run curl -k -u USER:PASS https://localhost:20343/api/settings. You might be able to change it by calling this API as a PATCH request with a modified value for max_percent_disk_usage to something smaller and then giving it time to clean up. I haven't tested that however.
If you're interested in how this works, see /Applications/Xcode.app/Contents/Developer/usr/share/xcs/xcsd/routes/routes_setting.js line 19. From there you should be able to dig deeper and see for yourself.
Hope this helps.