[PATCH 6/7] Task: get_alias return None when alias undefined

[Ondrej Lichtner]

From: Ondrej Lichtner <olichtne(a)redhat.com&gt;

In case the alias is undefined we should return None instead of raising
an exception. This patch fixes that.

Signed-off-by: Ondrej Lichtner <olichtne(a)redhat.com&gt;
---
 lnst/Controller/Task.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lnst/Controller/Task.py b/lnst/Controller/Task.py
index f27b499..0d437f3 100644
--- a/lnst/Controller/Task.py
+++ b/lnst/Controller/Task.py
@@ -17,6 +17,7 @@ from lnst.Controller.PerfRepo import PerfRepoTestExecution
 from lnst.Controller.PerfRepo import PerfRepoValue
 from lnst.Common.Utils import dict_to_dot, list_to_dot
 from lnst.Common.Config import lnst_config
+from lnst.Controller.XmlTemplates import XmlTemplateError
 
 # The handle to be imported from each task
 ctl = None
@@ -103,7 +104,10 @@ class ControllerAPI(object):
             :return: value of a user defined alias
             :rtype: string
         """
-        return self._ctl._get_alias(alias)
+        try:
+            return self._ctl._get_alias(alias)
+        except XmlTemplateError:
+            return None
 
     def connect_PerfRepo(self, url=None, username=None, password=None):
         if not self._perf_repo_api.connected():
-- 
2.4.6