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#!/usr/bin/env python
# Copyright 2014 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.

import glob
import optparse
import os
import shutil
import subprocess
import sys

def reorder_imports(input_dir, output_dir):
  """Run swapimports.exe on the initial chrome.exe, and write to the output
  directory. Also copy over any related files that might be needed
  (pdbs, manifests etc.).
  """
  input_image = '--input-image=%s' % (os.path.join(input_dir, 'chrome.exe'))
  output_image = '--output-image=%s' % (os.path.join(output_dir, 'chrome.exe'))

  swap_exe = os.path.join(
      __file__,
      '..\\..\\..\\third_party\\syzygy\\binaries\\exe\\swapimport.exe')
  subprocess.call(
      [swap_exe, input_image, output_image, '--overwrite', 'chrome_elf.dll'])

  for fname in glob.iglob(os.path.join(input_dir, 'chrome.exe.*')):
    shutil.copy(fname, os.path.join(output_dir, os.path.basename(fname)))
  return 0


def main(argv):
  usage = 'reorder_imports.py -i <input_dir> -o <output_dir>'
  parser = optparse.OptionParser(usage=usage)
  parser.add_option('-i', '--input', help='reorder chrome.exe in DIR',
      metavar='DIR')
  parser.add_option('-o', '--output', help='write new chrome.exe to DIR',
      metavar='DIR')
  opts, args = parser.parse_args()

  if not opts.input or not opts.output:
    parser.error('Please provide and input and output directory')
  return reorder_imports(opts.input, opts.output)

if __name__ == "__main__":
  sys.exit(main(sys.argv[1:]))