Print time of long running hook actions

gclient_utils.py

 # Copyright (c) 2012 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.
 
 """Generic utils."""
 
 import codecs
 import logging
 import os
+import pipes
 import Queue
 import re
 import stat
 import subprocess
 import sys
 import tempfile
 import threading
 import time
 import urlparse
 
@@ skipping 155 matching lines @@
       os.makedirs(tree)
     except OSError, e:
       # 17 POSIX, 183 Windows
       if e.errno not in (17, 183):
         raise
       if count > 40:
         # Give up.
         raise
 
 
+def CommandToStr(args):
+  """Converts an arg list into a shell escaped string."""
+  return ' '.join(pipes.quote(arg) for arg in args)
+
+
 def CheckCallAndFilterAndHeader(args, always=False, header=None, **kwargs):
   """Adds 'header' support to CheckCallAndFilter.
 
   If |always| is True, a message indicating what is being done
   is printed to stdout all the time even if not output is generated. Otherwise
   the message header is printed only if the call generated any ouput.
   """
   stdout = kwargs.setdefault('stdout', sys.stdout)
   if header is None:
     header = "\n________ running '%s' in '%s'\n" % (
-                 ' '.join(args), kwargs.get('cwd', '.'))
+                 CommandToStr(args), kwargs.get('cwd', '.'))
 
   if always:
     stdout.write(header)
   else:
     filter_fn = kwargs.get('filter_fn')
     def filter_msg(line):
       if line is None:
         stdout.write(header)
       elif filter_fn:
         filter_fn(line)
@@ skipping 665 matching lines @@
 
   Python on OSX 10.6 raises a NotImplementedError exception.
   """
   try:
     import multiprocessing
     return multiprocessing.cpu_count()
   except:  # pylint: disable=W0702
     # Mac OS 10.6 only
     # pylint: disable=E1101
     return int(os.sysconf('SC_NPROCESSORS_ONLN'))