Use a better lib arguments lib than commander

[doubleface]

Commander lacks of feature about default values for arguments and there are more modern argument parsing librairies.

Konitor already uses yargs and I propose to use it.

[ptbrowne]

I wonder if @CPatchane has any thought about this ?

[CPatchane]

What is konitor? I don't find any projects with this name.
Do you have an example of needs that where commander is not enough?

[ptbrowne]

Konitor : https://github.com/konnectors/konitor

Two examples where IMHO commander does not shine :

positional arguments

commander seems more gearer towards options than arguments. It does not provide a way to easily parse positional arguments for example.

let file

program
  .arguments('<file>')
  .action(_file => file = path.absname(_file))

seems to be the normal way of doing things with commander. I think it is not very convenient.

subcommands

With commander, when you have a program with subcommands, it does not fail if the subcommand does not exist so you have to write custom code to handle the case : https://gitlab.cozycloud.cc/labs/ACH/commit/f2499c29d9d0d606ecd47ee1e45a6192b5be0757.

It feels like commander is half-baked, I would be happy to be wrong, tell me if I overlooked some things :/