X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=roundup%2Finstance.py;h=fb98b76537d1f9199f1efe93a0b1263763e35266;hb=12a4d1f7f0e4922bae11222edee94e66d987e59e;hp=432bab6b8d27859dd0aa6b1dc4b92743b92027f8;hpb=c853df7b1fb5c3deee55fd7c8396f56259b060f6;p=roundup.git

diff --git a/roundup/instance.py b/roundup/instance.py
index 432bab6..fb98b76 100644
--- a/roundup/instance.py
+++ b/roundup/instance.py
@@ -4,7 +4,7 @@
 # under the same terms as Python, so long as this copyright message and
 # disclaimer are retained in their original form.
 #
-# IN NO EVENT SHALL THE BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
+# 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.
@@ -15,13 +15,16 @@
 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
 # 
-# $Id: instance.py,v 1.2 2001-08-07 00:15:51 richard Exp $
+# $Id: instance.py,v 1.6 2002-09-10 00:18:20 richard Exp $
 
-''' Currently this module provides one function: open. This function opens
+__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):
@@ -29,6 +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)
@@ -44,12 +53,4 @@ del Opener
 del opener
 
 
-#
-# $Log: not supported by cvs2svn $
-# Revision 1.1  2001/08/05 07:43:52  richard
-# Instances are now opened by a special function that generates a unique
-# module name for the instances on import time.
-#
-#
-#
 # vim: set filetype=python ts=4 sw=4 et si