[CMF-checkins] CVS: CMF/CMFDefault/Extensions - Upgrade.py:1.1.2.1

[Tres Seaver]

Update of /cvs-repository/CMF/CMFDefault/Extensions
In directory cvs.zope.org:/tmp/cvs-serv15008/CMFDefault/Extensions

Added Files:
      Tag: CMF-1_2-branch
	Upgrade.py 
Log Message:


 - Added 'CMFDefault.Upgrade.upgrade_decor_skins' external method to
   convert existing sites which had installed skin directories from the
   now-deprecated 'CMFDecor' product (Tracker #434).  Added note
   explaining the issue, and the workaround, to 'ISSUES.txt'.


=== Added File CMF/CMFDefault/Extensions/Upgrade.py ===
##############################################################################
#
# Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved.
# 
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
# 
##############################################################################
"""
    Utility functions for upgrading CMFDefault-based sites.
"""

from Acquisition import aq_inner
import string

def upgrade_decor_skins( self ):
    """
        Upgrade old skin diretories loaded from 'CMFDecor' to load from
        'CMFDefault' (and zap the 'zpt_images' one).
    """
    log = []

    DELETED_SKINS = ( 'zpt_images' , )

    MOVED_SKINS = ( 'zpt_content'
                  , 'zpt_control'
                  , 'zpt_generic'
                  )

    skins_tool = aq_inner( self ).portal_skins # start from CMFSite!

    for deleted in DELETED_SKINS:

        try:

            skins_tool._delObject( deleted )
        
        except AttributeError:
            pass
        
        else:
            log.append( 'Deleted CMFDecor skin directory: %s' % deleted )

    for moved in MOVED_SKINS:

        skin_dir = getattr( skins_tool, moved, None )

        if skin_dir is not None:

            skin_dir.manage_properties(
                dirpath='Products/CMFDefault/skins/%s' % moved )
            log.append( 'Updated CMFDecor skin directory to CMFDefault: %s'
                      % moved )

    return string.join( log, '\n' )