# HG changeset patch
# User Jeff Hammel <jhammel@mozilla.com>
# Date 1356926367 28800
# Node ID 7db9d9b82a06ffede9f983b40972f1b0e3299076
# Parent  dd7d385e11eaad0a7f97f723e5efaf9adfda5681
better error message

diff -r dd7d385e11ea -r 7db9d9b82a06 decoupage/web.py
--- a/decoupage/web.py	Tue Aug 28 22:04:26 2012 -0700
+++ b/decoupage/web.py	Sun Dec 30 19:59:27 2012 -0800
@@ -44,7 +44,7 @@
         self.auto_reload = self.auto_reload.lower() == 'true'
         self.cascade = self.cascade.lower() == 'true'
         self.directory = self.directory.rstrip(os.path.sep)
-        assert os.path.isdir(self.directory)
+        assert os.path.isdir(self.directory), "'%s' is not a directory" % self.directory
         self.template_directories = self.template_directories.split() # no spaces in directory names, for now
 
         for directory in self.template_directories: