Source code for CedarBackup3.actions.purge
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# Copyright (c) 2004-2007,2010,2015 Kenneth J. Pronovici.
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# Author   : Kenneth J. Pronovici <pronovic@ieee.org>
# Language : Python 3 (>= 3.4)
# Project  : Cedar Backup, release 3
# Purpose  : Implements the standard 'purge' action.
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# Module documentation
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"""
Implements the standard 'purge' action.
:author: Kenneth J. Pronovici <pronovic@ieee.org>
"""
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# Imported modules
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# System modules
import logging
# Cedar Backup modules
from CedarBackup3.filesystem import PurgeItemList
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# Module-wide constants and variables
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logger = logging.getLogger("CedarBackup3.log.actions.purge")
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# Public functions
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# executePurge() function
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# pylint: disable=W0613
[docs]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.
   Args:
      configPath (String representing a path on disk): Path to configuration file on disk
      options (Options object): Program command-line options
      config (Config object): Program configuration
   Raises:
      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.")