Make subprocess2.check_call() compliant with subprocess.check_call().

subprocess2.py

 # coding=utf8
 # Copyright (c) 2011 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 """Collection of subprocess wrapper functions.
 
 In theory you shouldn't need anything else in subprocess, or this module failed.
 """
 
 from __future__ import with_statement
@@ skipping 238 matching lines @@
 
   Automatically convert stdout=PIPE or stderr=PIPE to VOID.
   """
   if kwargs.get('stdout') == PIPE:
     kwargs['stdout'] = VOID
   if kwargs.get('stderr') == PIPE:
     kwargs['stderr'] = VOID
   return communicate(args, **kwargs)[1]
 
 
-def check_call(args, **kwargs):
+def check_call_out(args, **kwargs):
   """Improved version of subprocess.check_call().
 
   Returns (stdout, stderr), unlike subprocess.check_call().
   """
   out, returncode = communicate(args, **kwargs)
   if returncode:
     raise CalledProcessError(
         returncode, args, kwargs.get('cwd'), out[0], out[1])
   return out
 
 
+def check_call(args, **kwargs):
+  """Emulate subprocess.check_call()."""
+  check_call_out(args, **kwargs)
+  return 0
+
+
 def capture(args, **kwargs):
   """Captures stdout of a process call and returns it.
 
   Returns stdout.
 
   - Discards returncode.
   - Discards stderr. By default sets stderr=STDOUT.
   - Blocks stdin by default since no output will be visible.
   """
   if kwargs.get('stdin') is None:
     kwargs['stdin'] = VOID
   if kwargs.get('stdout') is None:
     kwargs['stdout'] = PIPE
   if kwargs.get('stderr') is None:
     kwargs['stderr'] = STDOUT
   return communicate(args, **kwargs)[0][0]
 
 
 def check_output(args, **kwargs):
-  """Captures stdout of a process call and returns it.
+  """Emulates subprocess.check_output().
 
-  Returns stdout.
+  Captures stdout of a process call and returns stdout only.
 
   - Discards stderr. By default sets stderr=STDOUT.
   - Throws if return code is not 0.
   - Works even prior to python 2.7.
   - Blocks stdin by default since no output will be visible.
   """
   if kwargs.get('stdin') is None:
     kwargs['stdin'] = VOID
   if kwargs.get('stdout') is None:
     kwargs['stdout'] = PIPE
   if kwargs.get('stderr') is None:
     kwargs['stderr'] = STDOUT
-  return check_call(args, **kwargs)[0]
+  return check_call_out(args, **kwargs)[0]