if not os.path.isdir(IDX_LOCATION):

            os.mkdir(IDX_LOCATION)

            log.info('Cannot run incremental index since it does not'

                     ' yet exist running full build')

            self.initial = True

    def get_paths(self, repo):

        """

        recursive walk in root dir and return a set of all path in that dir

        based on repository walk function

        """

        index_paths_ = set()

        try:

            for topnode, dirs, files in tip.walk('/'):

                for f in files:

                    index_paths_.add(jn(repo.path, f.path))

                for dir in dirs:

                    for f in files:

                        index_paths_.add(jn(repo.path, f.path))

        except RepositoryError:

            pass

        return index_paths_        

    def get_node(self, repo, path):