old_contents: #!/usr/bin/env python
  # Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  #
  # Use of this source code is governed by a BSD-style license
  # that can be found in the LICENSE file in the root of the source
  # tree. An additional intellectual property rights grant can be found
  # in the file PATENTS.  All contributing project authors may
  # be found in the AUTHORS file in the root of the source tree.
  
  """This script sets up AppRTC and its dependencies.
  
  Requires that depot_tools is installed and in the PATH.
  
  It will put the result under <output_dir>/collider.
  """
  
  import os
  import sys
  
  import utils
  
  
  SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
  
  
  def main(argv):
    if len(argv) == 1:
      return 'Usage %s <output_dir>' % argv[0]
  
    output_dir = os.path.abspath(argv[1])
  
    download_apprtc_path = os.path.join(SCRIPT_DIR, 'download_apprtc.py')
    utils.RunSubprocessWithRetry([download_apprtc_path, output_dir])
  
    build_apprtc_path = os.path.join(SCRIPT_DIR, 'build_apprtc.py')
    apprtc_src_dir = os.path.join(output_dir, 'apprtc', 'src')
    go_dir = os.path.join(output_dir, 'go')
    collider_dir = os.path.join(output_dir, 'collider')
    utils.RunSubprocessWithRetry([build_apprtc_path, apprtc_src_dir,
                                  go_dir, collider_dir])
  
  
  if __name__ == '__main__':
    sys.exit(main(sys.argv))
  
new_contents: #!/usr/bin/env python
  # Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
  #
  # Use of this source code is governed by a BSD-style license
  # that can be found in the LICENSE file in the root of the source
  # tree. An additional intellectual property rights grant can be found
  # in the file PATENTS.  All contributing project authors may
  # be found in the AUTHORS file in the root of the source tree.
  
  """This script sets up AppRTC and its dependencies.
  
  Requires that depot_tools is installed and in the PATH.
  
  It will put the result under <output_dir>/collider.
  """
  
  import os
  import sys
  
  import utils
  
  
  SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
  
  
  def main(argv):
    if len(argv) == 1:
      return 'Usage %s <output_dir>' % argv[0]
  
    output_dir = os.path.abspath(argv[1])
  
    download_apprtc_path = os.path.join(SCRIPT_DIR, 'download_apprtc.py')
    utils.RunSubprocessWithRetry([sys.executable, download_apprtc_path,
                                  output_dir])
  
    build_apprtc_path = os.path.join(SCRIPT_DIR, 'build_apprtc.py')
    apprtc_src_dir = os.path.join(output_dir, 'apprtc', 'src')
    go_dir = os.path.join(output_dir, 'go')
    collider_dir = os.path.join(output_dir, 'collider')
    utils.RunSubprocessWithRetry([sys.executable, build_apprtc_path,
                                  apprtc_src_dir, go_dir, collider_dir])
  
  
  if __name__ == '__main__':
    sys.exit(main(sys.argv))
  
subject: Use sys.executable to launch another Python script