Click: Bash complete fails for click.Choice() arguments

[travis-bear]

Arguments of type 'click.Choice' are properly constrained on invocation, but do not show up in bash tab completion.

dws.py:

...

SETTINGS = [
    "auto_start",
    "disk_size",
    "environment"
]

@click.group()
def cli():
    pass


@cli.command()
@click.argument('setting', type=click.Choice(SETTINGS), nargs=1)
@click.argument('value', nargs=1)
def set(setting, value):
    '''
    Persists a named setting.  Supported settings:
    ["environment", "add_to_chef"]
    '''
    click.echo("Persisting a setting: %s=%s" % (setting, value))

...

dws <tab> <tab> reveals the set function as expected, but not the allowable values from the SETTINGS list.

[untitaker]

The current click bashcompletion doesn't do any kind of completion of the _values_ of options and arguments.

[wreed4]

Is there any plan to incorporate this feature? I'd be very interested in this.