Open Radar

 
Xcode Bots should not re-clone the entire repo (with all history) when set to clean. This causes our integrations to take up to 15-20 minutes to complete where most of the time is spent re-downloading the repo over and over.

With git there isn't really a point in having clean delete the repo anyway, but assuming that behavior is kept the clone should do a shallow clone of only the branch being integrated. This would tremendously speed up the integrations.

Steps:
1. Setup an Xcode bot to point to a remote repo (eg: Github)
2. Set the bot to Clean Always (which is ideal from a testing perspective)
3. Watch as the bot takes *forever* to download the entire repo's history on every single integration

Expected results:
The *smart* thing to do would be to cache the git repo and do a fetch, then check out a disconnected head of the branch being integrated into a separate build location. That way you could ensure a pristine copy of the source without re-downloading.

Failing that, just do a shallow clone. It is the ultimate waste of bandwidth to repeatedly download and delete the entire history of the repo for every single bot.