From 6bf2e84b8cebc4c53bf44343ed4e9b88aa73e34d Mon Sep 17 00:00:00 2001
From: Mike Pagano <mpagano@gentoo.org>
Date: Fri, 16 Aug 2013 14:40:56 -0400
Subject: diffconfig: Gracefully exit if the default config files are not
 present

Handle gracefully the instance where config files are not present.
Compatible with python versions 2.5, 2.6 and 2.7.
The try/except is forward compatible with python version 3 once the entire script is ported.

Signed-off-by: Mike Pagano <mpagano@gentoo.org>
Signed-off-by: Michal Marek <mmarek@suse.cz>

diff --git a/scripts/diffconfig b/scripts/diffconfig
index b91f3e3..0ee6583 100755
--- a/scripts/diffconfig
+++ b/scripts/diffconfig
@@ -94,8 +94,13 @@ def main():
         configa_filename = sys.argv[1]
         configb_filename = sys.argv[2]
 
-    a = readconfig(file(configa_filename))
-    b = readconfig(file(configb_filename))
+    try:
+        a = readconfig(file(configa_filename))
+        b = readconfig(file(configb_filename))
+    except (IOError):
+        e = sys.exc_info()[1]
+        print("I/O error[%s]: %s\n" % (e.args[0],e.args[1]))
+        usage()
 
     # print items in a but not b (accumulate, sort and print)
     old = []
-- 
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