Formally define step config, pass to stream.

recipe_engine/util.py

 # Copyright 2013 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 import contextlib
 import functools
 import os
 import sys
 import traceback
 import urllib
@@ skipping 144 matching lines @@
   except Exception as e:
     if isinstance(e, exc_cls):
       raise
     else:
       # Print right away in case the bug is in the stream_engine.
       traceback.print_exc()
       print '@@@STEP_EXCEPTION@@@'
 
       if stream_engine:
         # Now do it a little nicer with annotations.
-        with stream_engine.new_step_stream('Recipe engine bug') as stream:
+        with stream_engine.make_step_stream('Recipe engine bug') as stream:
           stream.set_step_status('EXCEPTION')
           with stream.new_log_stream('exception') as log:
             log.write_split(traceback.format_exc())
           stream.add_step_link('file a bug', BUG_LINK)
       sys.stdout.flush()
       sys.stderr.flush()
       os._exit(2)
 
 
 class StringListIO(object):
   def __init__(self):
     self.lines = [StringIO()]
 
   def write(self, s):
     while s:
       i = s.find('\n')
       if i == -1:
         self.lines[-1].write(s)
         break
       self.lines[-1].write(s[:i])
       self.lines[-1] = self.lines[-1].getvalue()
       self.lines.append(StringIO())
       s = s[i+1:]
 
   def close(self):
     if not isinstance(self.lines[-1], basestring):
       self.lines[-1] = self.lines[-1].getvalue()