From ec912d50740b5ee63f705c08c9487d0a108a04e3 Mon Sep 17 00:00:00 2001
From: Julien Malik <julien.malik@paraiso.me>
Date: Tue, 8 Mar 2016 17:38:29 +0100
Subject: [PATCH] [fix] Protect against empty files

---
 src/yunohost/service.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/yunohost/service.py b/src/yunohost/service.py
index 3823aef4..4cedfb35 100644
--- a/src/yunohost/service.py
+++ b/src/yunohost/service.py
@@ -395,8 +395,9 @@ def _get_diff(string, filename):
 
         string = string + '\n'
         new_lines = string.splitlines(True)
-        while '\n' == file_lines[-1]:
-            del file_lines[-1]
+        if file_lines:
+            while '\n' == file_lines[-1]:
+                del file_lines[-1]
         return difflib.unified_diff(file_lines, new_lines)
     except IOError: return []