replace prep_libc.sh with prep_libc.py, and quiet the output

base/allocator/prep_libc.py

+#!/usr/bin/env python
+
+# 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.
+#
+# This script takes libcmt.lib for VS2005/08/10 and removes the allocation

[M-A Ruel, 2012/05/30 12:55:11]

This should be a docstring.

+# related functions from it.
+#
+# Usage: prep_libc.py <VCInstallDir> <OutputDir>
+#
+# VCInstallDir is the path where VC is installed, something like:
+#    C:\Program Files\Microsoft Visual Studio 8\VC\
+#
+# OutputDir is the directory where the modified libcmt file should be stored.
+
+import os
+import shutil
+import subprocess
+import sys
+

[M-A Ruel, 2012/05/30 12:55:11]

The rest of the code base is formatted with 2 vertical lines between file level
symbols

+def run(command, filter=None):
+  """Run |command|, removing any lines that match |filter|. The filter is
+  to remove the echoing of input filename that 'lib' does."""
+  popen = subprocess.Popen(
+      command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+  out, _ = popen.communicate()
+  for line in out.splitlines():
+    if filter and line.strip() != filter:
+      print line
+  return popen.returncode
+
+def main():
+  vs_install_dir = sys.argv[1]
+  outdir = sys.argv[2]
+  output_lib = os.path.join(outdir, 'libcmt.lib')
+  shutil.copyfile(os.path.join(vs_install_dir, 'libcmt.lib'), output_lib)
+  shutil.copyfile(os.path.join(vs_install_dir, 'libcmt.pdb'),
+                  os.path.join(outdir, 'libcmt.pdb'))
+  vspaths = [
+    'build\\intel\\mt_obj\\',

[Evan Martin, 2012/05/23 17:44:15]

perhaps more readable as
  r'build\intel\mt_obj' '\\'

[M-A Ruel, 2012/05/30 12:55:11]

I personally disagree, either a string all r'' or all '', but mixing r'' and ''
is bad taste to me. And since r'\' doesn't work...

+    'f:\\dd\\vctools\\crt_bld\\SELF_X86\\crt\\src\\build\\INTEL\\mt_obj\\'
+  ]
+  objfiles = ['malloc', 'free', 'realloc', 'new', 'delete', 'new2', 'delete2',
+              'align', 'msize', 'heapinit', 'expand', 'heapchk', 'heapwalk',
+              'heapmin', 'sbheap', 'calloc', 'recalloc', 'calloc_impl',
+              'new_mode', 'newopnt']
+  for obj in objfiles:
+    for vspath in vspaths:
+      cmd = ('lib /nologo /ignore:4006,4014,4221 /remove:%s%s.obj %s' %

[M-A Ruel, 2012/05/30 12:55:11]

Please use a list, not a string.

+             (vspath, obj, output_lib))
+      run(cmd, obj + '.obj')

[M-A Ruel, 2012/05/30 12:55:11]

you shouldn't discard the return code. If one of the execution fails, we want to
know.

+
+if __name__ == "__main__":
+  sys.exit(main())