Fix for failing testsuite when using --with-xml-coverage on windows.

See  #1428 for discussion.

IPython/utils/process.py

@@ -1,123 +1,119 b''
 # encoding: utf-8
 """
 Utilities for working with external processes.
 """
 
 #-----------------------------------------------------------------------------
 #  Copyright (C) 2008-2011  The IPython Development Team
 #
 #  Distributed under the terms of the BSD License.  The full license is in
 #  the file COPYING, distributed as part of this software.
 #-----------------------------------------------------------------------------
 
 #-----------------------------------------------------------------------------
 # Imports
 #-----------------------------------------------------------------------------
 from __future__ import print_function
 
 # Stdlib
 import os
 import sys
 import shlex
 
 # Our own
 if sys.platform == 'win32':
     from ._process_win32 import _find_cmd, system, getoutput, AvoidUNCPath, arg_split
 else:
     from ._process_posix import _find_cmd, system, getoutput, arg_split
 
 
 from ._process_common import getoutputerror
 from IPython.utils import py3compat
 
 #-----------------------------------------------------------------------------
 # Code
 #-----------------------------------------------------------------------------
 
 
 class FindCmdError(Exception):
     pass
 
 
 def find_cmd(cmd):
     """Find absolute path to executable cmd in a cross platform manner.
 
     This function tries to determine the full path to a command line program
     using `which` on Unix/Linux/OS X and `win32api` on Windows.  Most of the
     time it will use the version that is first on the users `PATH`.  If
     cmd is `python` return `sys.executable`.
 
     Warning, don't use this to find IPython command line programs as there
     is a risk you will find the wrong one.  Instead find those using the
     following code and looking for the application itself::
 
         from IPython.utils.path import get_ipython_module_path
         from IPython.utils.process import pycmd2argv
         argv = pycmd2argv(get_ipython_module_path('IPython.frontend.terminal.ipapp'))
 
     Parameters
     ----------
     cmd : str
         The command line program to look for.
     """
     if cmd == 'python':
         return os.path.abspath(sys.executable)
     try:
         path = _find_cmd(cmd).rstrip()
     except OSError:
         raise FindCmdError('command could not be found: %s' % cmd)
     # which returns empty if not found
     if path == '':
         raise FindCmdError('command could not be found: %s' % cmd)
     return os.path.abspath(path)
 
 
 def pycmd2argv(cmd):
     r"""Take the path of a python command and return a list (argv-style).
 
     This only works on Python based command line programs and will find the
     location of the ``python`` executable using ``sys.executable`` to make
     sure the right version is used.
 
     For a given path ``cmd``, this returns [cmd] if cmd's extension is .exe,
     .com or .bat, and [, cmd] otherwise.
 
     Parameters
     ----------
     cmd : string
       The path of the command.
 
     Returns
     -------
     argv-style list.
     """
     ext = os.path.splitext(cmd)[1]
     if ext in ['.exe', '.com', '.bat']:
         return [cmd]
     else:
         if sys.platform == 'win32':
-            # The -u option here turns on unbuffered output, which is required
-            # on Win32 to prevent wierd conflict and problems with Twisted.
-            # Also, use sys.executable to make sure we are picking up the
-            # right python exe.
-            return [sys.executable, '-u', cmd]
+            return [sys.executable, cmd]
         else:
             return [sys.executable, cmd]
 
 def abbrev_cwd():
     """ Return abbreviated version of cwd, e.g. d:mydir """
     cwd = os.getcwdu().replace('\\','/')
     drivepart = ''
     tail = cwd
     if sys.platform == 'win32':
         if len(cwd) < 4:
             return cwd
         drivepart,tail = os.path.splitdrive(cwd)
 
 
     parts = tail.split('/')
     if len(parts) > 2:
         tail = '/'.join(parts[-2:])
 
     return (drivepart + (
         cwd == '/' and '/' or tail))