def do_print(filename):
    """Print the AST of filename."""
    with open(filename) as cmake_file:
        body = ast.parse(cmake_file.read())

        word_print = _print_details(lambda n: "{0} {1}".format(n.type,
                                                               n.contents))
        ast_visitor.recurse(body,
                            while_stmnt=_print_details(),
                            foreach=_print_details(),
                            function_def=_print_details(),
                            macro_def=_print_details(),
                            if_block=_print_details(),
                            if_stmnt=_print_details(),
                            elseif_stmnt=_print_details(),
                            else_stmnt=_print_details(),
                            function_call=_print_details(lambda n: n.name),
                            word=word_print)
Print the AST of filename.