From f0167fddfd909ed6b5f4252f55504288dcb16405 Mon Sep 17 00:00:00 2001
From: Michael Drake <michael.drake@codethink.co.uk>
Date: Wed, 18 Mar 2015 18:16:23 +0000
Subject: Make warning messages more user friendly.

Printing the file and line number of the warning's origin
makes the warning itself harder to spot, and can make it
appear as if something has actually gone wrong.

Change-Id: Ie77357d9a061d31e234e6e434521d2d274409773
---
 morphlib/app.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/morphlib/app.py b/morphlib/app.py
index c8fe397d..654451f4 100644
--- a/morphlib/app.py
+++ b/morphlib/app.py
@@ -20,6 +20,7 @@ import pipes
 import sys
 import time
 import urlparse
+import warnings
 import extensions
 
 import morphlib
@@ -213,6 +214,12 @@ class Morph(cliapp.Application):
         with morphlib.util.hide_password_environment_variables(os.environ):
             cliapp.Application.log_config(self)
 
+        def pretty_warnings(message, category, filename, lineno,
+                            file=None, line=None):
+            return 'WARNING: %s' % (message)
+
+        warnings.formatwarning = pretty_warnings
+
     def process_args(self, args):
         self.check_time()
 
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