Handle undefined __file__

Needed for running non-interactively.

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

scullery.py

@@ -47,7 +47,11 @@ is_packaged = False
 if is_packaged:
     vagfile='/usr/share/scullery/{}'.format(vagfile)
 else:
-    vagfile='{}/{}'.format(os.path.abspath(os.path.dirname(__file__)), vagfile)
+    try:
+        me = __file__
+    except NameError:
+        me = sys.argv[0]
+    vagfile='{}/{}'.format(os.path.abspath(os.path.dirname(me)), vagfile)
 
 def _abort(msg):
     log.error(msg)