def create_fork(self, form_data, cur_user):

        from rhodecode.lib.celerylib import tasks, run_task

        run_task(tasks.create_repo_fork, form_data, cur_user)

    def delete(self, repo):

        try:

            self.sa.delete(repo)

            self.__delete_repo(repo)

            self.sa.commit()

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def delete_perm_user(self, form_data, repo_name):

        try:

            self.sa.query(RepoToPerm)\

                .filter(RepoToPerm.repository \

                        == self.get_by_repo_name(repo_name))\

                .filter(RepoToPerm.user_id == form_data['user_id']).delete()

            self.sa.commit()

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def delete_perm_users_group(self, form_data, repo_name):

        try:

            self.sa.query(UsersGroupToPerm)\

                .filter(UsersGroupToPerm.repository \

                        == self.get_by_repo_name(repo_name))\

                .filter(UsersGroupToPerm.users_group_id \

                        == form_data['users_group_id']).delete()

            self.sa.commit()

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def delete_stats(self, repo_name):

        try:

            self.sa.query(Statistics)\

                .filter(Statistics.repository == \

                        self.get_by_repo_name(repo_name)).delete()

            self.sa.commit()

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def __create_repo(self, repo_name, alias):

        """

        makes repository on filesystem

        :param repo_name:

        :param alias:

        """

        from rhodecode.lib.utils import check_repo

        repo_path = os.path.join(self.base_path, repo_name)

        if check_repo(repo_name, self.base_path):

            log.info('creating repo %s in %s', repo_name, repo_path)

            backend = get_backend(alias)

            backend(repo_path, create=True)

    def __rename_repo(self, old, new):

        """

        renames repository on filesystem

        :param old: old name

        :param new: new name

        """

        log.info('renaming repo from %s to %s', old, new)

        old_path = os.path.join(self.base_path, old)

        new_path = os.path.join(self.base_path, new)

        if os.path.isdir(new_path):

            raise Exception('Was trying to rename to already existing dir %s',

                            new_path)

        shutil.move(old_path, new_path)

    def __delete_repo(self, repo):

        """

        removes repo from filesystem, the removal is acctually made by

        added rm__ prefix into dir, and rename internat .hg/.git dirs so this

        repository is no longer valid for rhodecode, can be undeleted later on

        by reverting the renames on this repository

        :param repo: repo object

        """

        rm_path = os.path.join(self.base_path, repo.repo_name)

        log.info("Removing %s", rm_path)

        #disable hg/git

        alias = repo.repo_type

        shutil.move(os.path.join(rm_path, '.%s' % alias),

                    os.path.join(rm_path, 'rm__.%s' % alias))

        #disable repo

        shutil.move(rm_path, os.path.join(self.base_path, 'rm__%s__%s' \