feature: introduce concept of named parameters instead of optional parameters

[cherusk]

I don't like the delineation of optional/positional. Optionality should be a trait of the parameter, indifferent of how it is passed.

Hence, new delineation would be positional or named, the current "optional".

That's how argparse[1] does it essentially.

[1] https://docs.python.org/3/library/argparse.html#argparse.ArgumentParser.add_argument

[jacobdeichert]

Hmmm not quite sure if I'm missing something here... but I think "named parameters" is the same thing as optional flags.

The idea with positional required/optional args is that they are for really simple cases. If you need more complex parameters, then optional flags might be better.

Do you maybe want the ability to mark certain flags as required?

[cherusk]

Hmmm not quite sure if I'm missing something here... but I think "named parameters" is the same thing as optional flags <https://github.com/jakedeichert/mask#optional-flags>. The idea with positional required/optional <#5> args is that they are for really simple cases. If you need more complex parameters, then optional flags might be better.

It's not the same.

Do you maybe want the ability to mark certain flags as required?

Exactly, but that goes not only for "named", but also for positional params. Ok, one can reflect that in the backend logic again of course.

[jacobdeichert]

Exactly, but that goes not only for "named", but also for positional
params.

So positional args are already always required.

For optional flags, apparently clap does support making flags required.

I think we can support this by adding a new field to our optional flag definition:

## cmd

**OPTIONS**
* check
    * flags: -c --check
    * desc: Show which files are not formatted correctly
    * required

If our parser finds * required, then the flag is marked as required.

Pretty easy to support if anyone wants to make a PR 👍

[cherusk]

So positional args are already always required.

Find that wrong though as said.

Pretty easy to support if anyone wants to make a PR +1

Will implement it.

[cherusk]

Clap is amazing. :)

[jacobdeichert]

Marking as closed due to #74

Aiming for a release this week.