Moving structopt to clap (clap_derive)

[theredfish]

Clap recently introduced clap_derive . Would it be ok if I propose a new PR to integrate the changes and move to it?

structop is using clap behind the scene and will be soft-deprecated in favor of clap_derive.

Before proposing a new PR for this I just want to know if this change is ok for you?

[tyranron]

@theredfish we've used clap, but intentionally have switched to structopt, because at the moment of our investigation clap_derive lacked support for flattening over type parameters, which we're using to make our CLI composable.

We're going to switch back to clap once it supports that feature.

If you'd like to drive that feature in upstream and then propose a PR here, we would be happy about that!

[theredfish]

Oh ok yes definitely! I will keep you updated 👍

[ilslv]

structopt-like generics support just got merged, so it looks like we can migrate to clap v3.0.0-beta.6 once it gets released.

[tyranron]

@ilslv 3.0.0-rc.1 has been released

[theredfish]

@ilslv 3.0.0-rc.1 has been released

Do you plan to make the update ? I'm still available to make the update if you want. Let me know

[tyranron]

@theredfish as we've said before, we would love to see a PR. So, go ahead!