Prevent command "del /s" from entering a folder

I need to recursively remove unnecessary fil开发者_StackOverflow社区es from a svn repository and i have the following batch file to do this:

@echo on
del /s ~*.*
del /s *.~*
del /s Thumbs.db

However, this is also deleting the entries under the .svn/ subfolders. Is there any way to prevent this commands from being executed under the .svn/ folders so that it doesn't mess things up?

Thanks in advance!

EDIT: A solution using Bash (cygwin) would also work for me since i just need to do this once.

del ~*.*
del *.~*
del Thumbs.db
for /d %%a in (*) do (
    if not "%%a" == ".svn" (
      cd %%a
      del /s ~*.*
      del /s *.~*
      del /s Thumbs.db
      cd ..
    )
)

No idea how to do this in a batch file, but A bash solution is simply:

find . -name .svn -prune -o -print | egrep "/~.*|/[^/].*\.~.*$|/Thumbs.db" | xargs rm -f

Although I recommend redirecting to a file first and then eyeballing the files.

The first command finds everything not in a .svn subdir. The second command selects those things you want to delete, and the third deletes them.