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[roundup.git] / roundup / instance.py

diff --git a/roundup/instance.py b/roundup/instance.py
index d81b938841154d347418321ebcf22e28d2151eaf..fb98b76537d1f9199f1efe93a0b1263763e35266 100644 (file)
--- a/roundup/instance.py
+++ b/roundup/instance.py
@@ -1,10 +1,30 @@
-# $Id: instance.py,v 1.1 2001-08-05 07:43:52 richard Exp $
-
-''' Currently this module provides one function: open. This function opens
+#
+# 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: instance.py,v 1.6 2002-09-10 00:18:20 richard Exp $
+
+__doc__ = '''
+Instance handling (open instance).
+
+Currently this module provides one function: open. This function opens
 an instance.
 '''
 
-import imp
+import imp, os
 
 class Opener:
     def __init__(self):
@@ -12,6 +32,12 @@ class Opener:
         self.instances = {}
 
     def open(self, instance_home):
+        '''Open the instance.
+
+        Raise ValueError if the instance home doesn't exist.
+        '''
+        if not os.path.exists(instance_home):
+            raise ValueError, 'no such directory: "%s"'%instance_home
         if self.instances.has_key(instance_home):
             return imp.load_package(self.instances[instance_home],
                 instance_home)
@@ -27,8 +53,4 @@ del Opener
 del opener
 
 
-#
-# $Log: not supported by cvs2svn $
-#
-#
 # vim: set filetype=python ts=4 sw=4 et si