text: #!/usr/bin/env python
  # Copyright 2012 The LUCI Authors. All rights reserved.
  # Use of this source code is governed under the Apache License, Version 2.0
  # that can be found in the LICENSE file.
  
  import os
  import subprocess
  import sys
  
  
  def child():
    """When the gyp argument is not specified, the command is started from
    --root-dir directory.
    """
    print('child from %s' % os.getcwd())
    # Force file opening with a non-normalized path.
    open(os.path.join('tests', '..', 'trace_inputs.py'), 'rb').close()
    open(os.path.join(
        'tests', '..', 'tests', 'trace_inputs_smoke_test.py'), 'rb').close()
    # Do not wait for the child to exit.
    # Use relative directory.
    subprocess.Popen(
        ['python', 'child2.py'], cwd=os.path.join('tests', 'trace_inputs'))
    return 0
  
  
  def child_gyp():
    """When the gyp argument is specified, the command is started from --cwd
    directory.
    """
    print('child_gyp from %s' % os.getcwd())
    # Force file opening.
    open(os.path.join('..', 'trace_inputs.py'), 'rb').close()
    open(os.path.join('..', 'tests', 'trace_inputs_smoke_test.py'), 'rb').close()
    # Do not wait for the child to exit.
    # Use relative directory.
    subprocess.Popen(['python', 'child2.py'], cwd='trace_inputs')
    return 0
  
  
  def main():
    if sys.argv[1] == '--child':
      return child()
    if sys.argv[1] == '--child-gyp':
      return child_gyp()
    return 1
  
  
  if __name__ == '__main__':
    sys.exit(main())
  