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/usr/share/pyshared/CedarBackup2/actions/purge.py is in cedar-backup2 2.26.5-3.

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# -*- coding: iso-8859-1 -*-
# vim: set ft=python ts=3 sw=3 expandtab:
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
#              C E D A R
#          S O L U T I O N S       "Software done right."
#           S O F T W A R E
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# Copyright (c) 2004-2007,2010 Kenneth J. Pronovici.
# All rights reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License,
# Version 2, as published by the Free Software Foundation.
#
# This program 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.
#
# Copies of the GNU General Public License are available from
# the Free Software Foundation website, http://www.gnu.org/.
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# Author   : Kenneth J. Pronovici <pronovic@ieee.org>
# Language : Python 2 (>= 2.7)
# Project  : Cedar Backup, release 2
# Purpose  : Implements the standard 'purge' action.
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #

########################################################################
# Module documentation
########################################################################

"""
Implements the standard 'purge' action.
@sort: executePurge
@author: Kenneth J. Pronovici <pronovic@ieee.org>
"""


########################################################################
# Imported modules
########################################################################

# System modules
import logging

# Cedar Backup modules
from CedarBackup2.filesystem import PurgeItemList


########################################################################
# Module-wide constants and variables
########################################################################

logger = logging.getLogger("CedarBackup2.log.actions.purge")


########################################################################
# Public functions
########################################################################

##########################
# executePurge() function
##########################

def executePurge(configPath, options, config):
   """
   Executes the purge backup action.

   For each configured directory, we create a purge item list, remove from the
   list anything that's younger than the configured retain days value, and then
   purge from the filesystem what's left.

   @param configPath: Path to configuration file on disk.
   @type configPath: String representing a path on disk.

   @param options: Program command-line options.
   @type options: Options object.

   @param config: Program configuration.
   @type config: Config object.

   @raise ValueError: Under many generic error conditions
   """
   logger.debug("Executing the 'purge' action.")
   if config.options is None or config.purge is None:
      raise ValueError("Purge configuration is not properly filled in.")
   if config.purge.purgeDirs is not None:
      for purgeDir in config.purge.purgeDirs:
         purgeList = PurgeItemList()
         purgeList.addDirContents(purgeDir.absolutePath)  # add everything within directory
         purgeList.removeYoungFiles(purgeDir.retainDays)  # remove young files *from the list* so they won't be purged
         purgeList.purgeItems()                           # remove remaining items from the filesystem
   logger.info("Executed the 'purge' action successfully.")