From 912528253fcf1fc43c1a2d02ffe6e540fe60d8e7 Mon Sep 17 00:00:00 2001
From: Vincent Vinet <vince.vinet@gmail.com>
Date: Mon, 19 Oct 2009 20:15:41 +0000
Subject: Merge the TProbe Integration and fix merging induced bugs

---
(limited to 'tutorius/constraints.py')

diff --git a/tutorius/constraints.py b/tutorius/constraints.py
index 36abdfb..e91f23a 100644
--- a/tutorius/constraints.py
+++ b/tutorius/constraints.py
@@ -200,7 +200,10 @@ class FileConstraint(Constraint):
     def validate(self, value):
         # TODO : Decide on the architecture for file retrieval on disk
         # Relative paths? From where? Support macros?
-        # 
+        # FIXME This is a hack to make cases where a default file is not valid
+        # work. It allows None values to be validated, though
+        if value is None:
+            return
         if not os.path.isfile(value):
             raise FileConstraintError("Non-existing file : %s"%value)
         return
--
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