merge from maint-0-5

[roundup.git] / roundup / backends / __init__.py

diff --git a/roundup/backends/__init__.py b/roundup/backends/__init__.py
index d2b20d285b60e244c65e814e4735d5ca7dceaaeb..8a6b1079a54dac2899627b997de4fd489481b751 100644 (file)
--- a/roundup/backends/__init__.py
+++ b/roundup/backends/__init__.py
@@ -1,4 +1,91 @@
-import back_bsddb; bsddb = back_bsddb
-import back_anydbm; anydbm = back_anydbm
+#
+# Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
+# This module is free software, and you may redistribute it and/or modify
+# under the same terms as Python, so long as this copyright message and
+# disclaimer are retained in their original form.
+#
+# IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
+# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
+# OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
+# POSSIBILITY OF SUCH DAMAGE.
+#
+# BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+# FOR A PARTICULAR PURPOSE.  THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
+# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
+# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+# 
+# $Id: __init__.py,v 1.19 2002-10-03 06:56:29 richard Exp $
 
-__all__ = ['bsddb', 'anydbm']
+''' Container for the hyperdb storage backend implementations.
+
+The __all__ variable is constructed containing only the backends which are
+available.
+'''
+
+__all__ = []
+
+try:
+    import sys, anydbm
+    if not hasattr(sys, 'version_info') or sys.version_info < (2,1,2):
+        import dumbdbm
+        # dumbdbm only works in python 2.1.2+
+        assert anydbm._defaultmod != dumbdbm
+        del anydbm
+        del dumbdbm
+except AssertionError:
+    print "WARNING: you should upgrade to python 2.1.3"
+except ImportError, message:
+    if str(message) != 'No module named anydbm': raise
+else:
+    import back_anydbm
+    anydbm = back_anydbm
+    __all__.append('anydbm')
+
+try:
+    import gadfly
+    import gadfly.client
+except ImportError, message:
+    if str(message) != 'No module named gadfly': raise
+else:
+    import back_gadfly
+    gadfly = back_gadfly
+    __all__.append('gadfly')
+
+try:
+    import sqlite
+except ImportError, message:
+    if str(message) != 'No module named sqlite': raise
+else:
+    import back_sqlite
+    sqlite = back_sqlite
+    __all__.append('sqlite')
+
+try:
+    import bsddb
+except ImportError, message:
+    if str(message) != 'No module named bsddb': raise
+else:
+    import back_bsddb
+    bsddb = back_bsddb
+    __all__.append('bsddb')
+
+try:
+    import bsddb3
+except ImportError, message:
+    if str(message) != 'No module named bsddb3': raise
+else:
+    import back_bsddb3
+    bsddb3 = back_bsddb3
+    __all__.append('bsddb3')
+
+try:
+    import metakit
+except ImportError, message:
+    if str(message) != 'No module named metakit': raise
+else:
+    import back_metakit
+    metakit = back_metakit
+    __all__.append('metakit')
+
+# vim: set filetype=python ts=4 sw=4 et si