Re: Removing directories and checking out a fresh repository before a build...

Im personally using git  repositories and git has nice function called
"clean", which allows me to remove all unversioned files.

I run this command in publisher compositor chain as with exec so the
source tree will be cleaning up of any build artifacts after all the
build phases.  Maybe it was my oversight somewhere but i was actually
forced to do this since my build stages involve of modifying a checked
out code (debian/changelog version number) and cc triggered git
upgrade failed because the change of sourcecode == conflict in merge..

You could try that approach too and what you can add to your exec can
be propably found in this thread in stackoverflow:

http://stackoverflow.com/questions/239340/automatically-remove-subversion-unversioned-files

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