From b145700207bf4ee1c1467616735cb29eb2ed89ed Mon Sep 17 00:00:00 2001
From: Pierre-Yves Chibon <pingou@pingoured.fr>
Date: Feb 27 2015 13:14:09 +0000
Subject: Raise an exception when adding a duplicate tag


Instead of changing the return message

---

diff --git a/progit/lib/__init__.py b/progit/lib/__init__.py
index 3354319..e86fd7f 100644
--- a/progit/lib/__init__.py
+++ b/progit/lib/__init__.py
@@ -166,7 +166,8 @@ def add_issue_tag(session, issue, tag, user, ticketfolder):
 
     for tag_issue in issue.tags:
         if tag_issue.tag == tag:
-            return 'Tag already present: %s' % tag
+            raise progit.exceptions.ProgitException(
+                'Tag already present: %s' % tag)
 
     tagobj = get_tag(session, tag)
     if not tagobj: