if start_cs.revision >= end_cs.revision:

                raise Exception('Start revision cannot be after End')

            yield start_cs

            while 1:

                next = start_cs.next()

                yield next

                start_cs = next

                if next == end_cs:

                    break

        #======================================================================

        # REAL CODE BELOW

        #======================================================================

        #get ranges of revisions if preset

        rev_range = revision.split('...')[:2]

        try:

            repo = hg_model.get_repo(c.repo_name)

            if len(rev_range) == 2:

                rev_start = rev_range[0]

                rev_end = rev_range[1]

                rev_ranges = get_cs_range(repo, rev_start, rev_end)

            else:

                rev_ranges = [repo.get_changeset(revision)]

        except (RepositoryError, ChangesetDoesNotExistError, Exception), e:

            log.error(traceback.format_exc())

            h.flash(str(e), category='warning')

            return redirect(url('home'))

        c.changes = OrderedDict()

        c.sum_added = 0

        c.sum_removed = 0

        for changeset in c.cs_ranges:

            c.changes[changeset.raw_id] = []

            try:

                changeset_parent = changeset.parents[0]

            except IndexError:

                changeset_parent = None

            #==================================================================

            # ADDED FILES

            #==================================================================

            for node in changeset.added:

                filenode_old = FileNode(node.path, '', EmptyChangeset())

                if filenode_old.is_binary or node.is_binary: