> Although it goes a long way, it doesn't always work -- it assumes that the 
> directory structure did not change in the project between the revisions - 
> distclean may not clean things that have changed since you updated the SVN 
> (note that to address that you should run distclean *before* the update). 
> Also note that R-devel is unstable for a reason -- as you are tracking it you 
> may encounter bugs in the build which will make your in-source build 
> (including distclean) break -- even if that bug is then fixed in next update 
> the damage has been done already so you cannot recover. This has happened 
> before, so in such cases you have to blow away everything and start from 
> scratch (from svn co ..).

One of the cool things about git is git clean - that allows you to
remove all non-git files from the repo without having to do checkout
from scratch.

Hadley

-- 
Chief Scientist, RStudio
http://had.co.nz/

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