# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1416001576 -3600
# Node ID e5cba2622d26f9e986f78b3ee09ae64cbd418c71
# Parent  c77062233ba5431d82b0a2e65022b539e596821a
Check we don't give null values to the processing pipeline.

diff -r c77062233ba5 -r e5cba2622d26 piecrust/processing/base.py
--- a/piecrust/processing/base.py	Fri Nov 14 22:45:12 2014 +0100
+++ b/piecrust/processing/base.py	Fri Nov 14 22:46:16 2014 +0100
@@ -109,6 +109,7 @@
 class ProcessorPipeline(object):
     def __init__(self, app, mounts, out_dir, force=False,
             skip_patterns=None, force_patterns=None, num_workers=4):
+        assert app and out_dir
         self.app = app
         self.mounts = mounts
         tmp_dir = app.cache_dir