Divide help message into categories

[thymbahutymba]

I would like to make my help message nicer. Since there are a lot of options, I would like to assign a title to a subset of that options. What I mean is something like this:

TITLE1
OPTIONS:
...
...
// Intentional blank line
TITLE2
OPTIONS:
....
....

Or the other way around:

OPTIONS:
TITLE1
...
...
// Intentional blank line
TITLE2
....
....

I'm using flatten in order to keep them separate in the code and then I would like to keep it separate in the help message as well, it is feasible?

[CreepySkeleton]

What you're asking for is impossible with clap 2.33, therefore, it's impossible with structopt.

Here's the issue for grouping subcommands there. I encourage you to create a similar issue for options.

Anyway, even if this is implemented ever, it will never be backported to 2.33, so structopt will never be able to support it. Sorry.

[thymbahutymba]

I understand, well what actually I would achieve is to have something that divides multiple options. I've tried to use chained subcommands but it did not worked. So something like that:
./prog command1 --option1.1 --option1.2 command2 --option2.1 --option2.2
The import thing is to have such options splited and easy to understand help message. Is this possible somehow?

[CreepySkeleton]

Clap can't do that: subcommand are supposed to be exclusive. You use only one at a time.

Although, there's clap-rs/clap#1407 which sounds a lot like what you're asking for.