Dynamically set values in click.Choice type

[ShawnRG]

Is it possible to dynamically set the choices on a click.Choice option?
The added complexity here is that, depending on the value of an option set on a group, the value will change.
Here is a small example of what I am trying to achieve:

@click.group
@click.option('--env')
def init(env):
    load_command_choices(env)
    pass

@init.command
@click.option('-c', type=click.Choice(get_command_choices()))
def some_command(c):
##

This works fine when you do not provide the -c argument explicitly, but fails when you do with the following error:

Usage: app init some-command [OPTIONS]
Try 'app init some-command --help' for help.

Error: Invalid value for '-c': 'test-value' is not one of .

I have tried the following:

• Make use of a callback on the command level to fill in the data: Callback is never triggered when providing the -c argument

Kind regards

[davidism]

You'd need to write a custom type to do this, but it should be possible, as the ParamType methods are passed the current context that could be used to introspect already parsed options. Note that you're also imposing ordering to the options, since you'd need the first to be processed to affect the options in the second, and we generally want to avoid a required order to options.

[ShawnRG]

Thanks for the quick answer. I will look into creating a custom type. As for the order of the arguments, in my example, the --env value will always come before the command's option, no?

[davidism]

Oh, in this case you're using a group, so yes.