code: def _restore_file(path, delete_backup=True):
      
      backup_base = '/var/local/woven-backup'
      backup_path = ''.join([backup_base,path])
      if exists(backup_path):
          if delete_backup:
              sudo('mv -f %s %s'% (backup_path,path))
          else:
              sudo('cp -f %s %s'% (backup_path,path))
docs: Restore a file if it exists and remove the backup