Add initial set support

[Neved4]

Fixes #34 #35

Would love some guidance to create the tests.

Note: Currently doesn't support set -- x y "$@" to append. This is equivalent to fish's set -a argv x y

[bouk]

Nice, just some tests :)

[Neved4]

Done! 🤍

[Neved4]

I'm yet to support set - x as opposed to set -- x.

set -- x "$@" into set -a argv x looks more challenging, but I'll still give it a try.

Makes sense to add those two translations to this PR.

Checklist:

• set - x -> set argv x
• set -- x -> set argv x
• set -- x "$@" -> set -a argv x
• set -Cefu -> (empty str)

[Neved4]

Supported set -x, but stuck on this last one.

Since $@ is globally transformed into argv in the parser, it'll still return set argv x $argv.

Tried adding more logic to parseSetExpr(), but unsure how to skip the $@ -> argv translation for specific lines.

If we skip it for lines akin to set -- x "$@", we can translate it to the correct fish output set -a argv x.

[Neved4]

@bouk Still not sure how to go about this one.

Would you prefer dropping support for:

• set -- x "$@" -> set -a argv x

And merge or would u rather give it a try?

The rest is ready and with passing tests.

Cheers ✌🏻

[Neved4]

• set -- x "$@" -> set -a argv x

Should be completed now 🎉

Would love ur feedback.