def _arguments(ctx, command_name=None):
    """Prints a list of arguments for shell completion hooks.

    If a command name is given, returns the arguments for that subcommand.
    The command name has to refer to a command; aliases are not supported.
    """
    ctx = ctx.parent
    main = ctx.command
    if command_name:
        command = main.get_command(ctx, command_name)
        if not command:
            return
    else:
        command = main

    types = ["option", "argument"]
    all_params = sorted(
        command.get_params(ctx), key=lambda p: types.index(p.param_type_name)
    )

    def get_name(param):
        return max(param.opts, key=len)

    for param in all_params:
        if param.param_type_name == "option":
            option = get_name(param)
            same_dest = [
                get_name(p) for p in all_params if p.name == param.name
            ]
            if same_dest:
                option = "({})".format(" ".join(same_dest)) + option
            if param.help:
                option += "[{}]".format(param.help or "")
            if not param.is_flag:
                option += "=:( )"
            click.echo(option)
        elif param.param_type_name == "argument":
            option = get_name(param)
            click.echo(":{}".format(option))
def _arguments ( ctx , command_name = None ) : ctx = ctx . parent main = ctx . command if command_name : command = main . get_command ( ctx , command_name ) if not command : return else : command = main types = [ "option" , "argument" ] all_params = sorted ( command . get_params ( ctx ) , key = lambda p : types . index ( p . param_type_name ) ) def get_name ( param ) : return max ( param . opts , key = len ) for param in all_params : if param . param_type_name == "option" : option = get_name ( param ) same_dest = [ get_name ( p ) for p in all_params if p . name == param . name ] if same_dest : option = "({})" . format ( " " . join ( same_dest ) ) + option if param . help : option += "[{}]" . format ( param . help or "" ) if not param . is_flag : option += "=:( )" click . echo ( option ) elif param . param_type_name == "argument" : option = get_name ( param ) click . echo ( ":{}" . format ( option ) )
Prints a list of arguments for shell completion hooks.

    If a command name is given, returns the arguments for that subcommand.
    The command name has to refer to a command; aliases are not supported.