def run():
    """
    Run the script in sys.argv[1] as if it had
    been invoked naturally.
    """
    __builtins__
    script_name = sys.argv[1]
    namespace = dict(
        __file__=script_name,
        __name__='__main__',
        __doc__=None,
    )
    sys.argv[:] = sys.argv[1:]

    open_ = getattr(tokenize, 'open', open)
    with open_(script_name) as fid:
        script = fid.read()
    norm_script = script.replace('\\r\\n', '\\n')
    code = compile(norm_script, script_name, 'exec')
    exec(code, namespace)

    Run the script in sys.argv[1] as if it had
    been invoked naturally.
    
product/gradle-plugin/src/main/python/setuptools/launch.py