Programmatic access to bpaf's usage message?

[crispinb]

I'd like to grab bpaf's own usage message (ie. not a custom one) for my own use.

This is mainly because I want a help subcommand which (a) does the same as the standard --help, and (b) will be the main fallback (ie. just invoking my command with zero args will run this help command, thus displaying the standard usage message).

Is this possible? Or otherwise is there a better way of doing the above?

[crispinb]

Sorry this should have been a discussion.

[pacak]

In bpaf terms subcommand is something with a dedicated name and help so the only thing help subcommand can display is a help for itself which is not very useful, you can return a default enum variant like so.

Next, to display the help message in your own code you can either use get_usage or implement your own variant of it - batteries only use public API so you can do that too.

In general capturing all the arguments from OS, adding extra --help at the end and passing it to Args::run_inner will give you help message

[crispinb]

Thanks, I found get_usage, which (a) does what I need, and (b) made me realise it would have been very straightforward to implement myself!