[feature request] customizable subcommand separator besides space

[samuela]

Many CLIs use colons to separate subcommands instead of spaces, eg. heroku auth:login, heroku auth:logout, etc. It would be nice to have support for this sort of thing in clap as well. It becomes especially important when maintaining backwards compatibility with CLIs written in this format.

[epage]

So it sounds like you want to have heroku auth:login act like heroku auth logic today? Is there a reason to do this instead of just defining an auth:login subcommand? For help management?

[samuela]

Yeah, it's not a huge deal writing a CLI from scratch. Just a bit of an issue if you want to rewrite an existing CLI with clap.

[epage]

I think what I'm missing is what the challenge is in porting an existing CLI to clap. In what way would a auth:login subcommand not work?

[samuela]

Honestly it's been a while since I was working on this, so I don't recall at this point. Things may have also changed with clap in the meantime that would obviate the need for this feature request.

[pksunkara]

I think the intention is to treat auth as a command and then it having it's own subcommands (maybe for better organization in the help messages?).