old_contents: # vim: fileencoding=utf-8 et sw=4 ts=4 tw=80:
  
  # python-quilt - A Python implementation of the quilt patch system
  #
  # Copyright (C) 2012  Björn Ricks <bjoern.ricks@googlemail.com>
  #
  # This library is free software; you can redistribute it and/or
  # modify it under the terms of the GNU Lesser General Public
  # License as published by the Free Software Foundation; either
  # version 2.1 of the License, or (at your option) any later version.
  
  # This library is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  # Lesser General Public License for more details.
  
  # You should have received a copy of the GNU Lesser General Public
  # License along with this library; if not, write to the Free Software
  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  # 02110-1301 USA
  
  from quilt.utils import Directory, File, DirectoryParam, FileParam
  
  class Backup(object):
  
      """ Class to backup files
  
      This class should be exented in future to support all functions of quilts
      backup-files script.
      """
  
      @DirectoryParam(["dest_dir"])
      @FileParam(["file"])
      def backup_file(self, file, dest_dir, copy_empty=False):
          if file.exists():
              if not copy_empty and file.is_empty():
                  return
              dest_dir.create()
              file.copy(dest_dir)
          else:
              dest_dir = dest_dir + file.get_directory()
              dest_dir.create()
              dest_file = dest_dir + file
              dest_file.touch()
  
  
new_contents: # vim: fileencoding=utf-8 et sw=4 ts=4 tw=80:
  
  # python-quilt - A Python implementation of the quilt patch system
  #
  # Copyright (C) 2012  Björn Ricks <bjoern.ricks@googlemail.com>
  #
  # This library is free software; you can redistribute it and/or
  # modify it under the terms of the GNU Lesser General Public
  # License as published by the Free Software Foundation; either
  # version 2.1 of the License, or (at your option) any later version.
  
  # This library is distributed in the hope that it will be useful,
  # but WITHOUT ANY WARRANTY; without even the implied warranty of
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  # Lesser General Public License for more details.
  
  # You should have received a copy of the GNU Lesser General Public
  # License along with this library; if not, write to the Free Software
  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  # 02110-1301 USA
  
  from quilt.utils import Directory, File, DirectoryParam, FileParam
  
  class Backup(object):
  
      """ Class to backup files
  
      This class should be exented in future to support all functions of quilts
      backup-files script.
      """
  
      @DirectoryParam(["dest_dir"])
      @FileParam(["file"])
      def backup_file(self, file, dest_dir, copy_empty=False):
          if file.exists():
              if not copy_empty and file.is_empty():
                  return None
              dest_dir.create()
              file.copy(dest_dir)
              return dest_dir + file
          elif copy_empty:
              dest_dir = dest_dir + file.get_directory()
              dest_dir.create()
              dest_file = dest_dir + file
              dest_file.touch()
              return dest_file
          else:
              return None
  
  
subject: Return created backup file