import shutil, os, subprocess

    def my_ignore(dir, fns):

        sysignore = shutil.ignore_patterns('.cq', '.svn')

        ignore = sysignore(dir, fns)

        # this ignore function is a kind of dirty hack.

        # The problem is that svn list requires access

        # to the repository

        # instead we check if subversion has info

        # about the file. If it does, it is in version control

        # svn returns exit code 0

        # otherwise it returns 1

        # ignore all files with return 1

        for fn in fns:

            # pipe the file descriptors to silence output

            if subprocess.call(['svn', 'info', os.path.join( dir, fn )],

                    stderr=subprocess.PIPE, stdout=subprocess.PIPE ) == 1:

                ignore.add( fn )

        return ignore

    shutil.copytree(svn, hgr, ignore=my_ignore)