"set" array support

[jayvdb]

As noted on the README, it isnt possible to set a key to be an array value, i.e. foo = ["bar"]

[gnprice]

#16 is a related issue, for setting ints and bools (as well as the existing strings.)

[gnprice]

Thanks @jayvdb for filing this!

I think the main question for how this should work is what the command-line interface for it should look like.

Do you have a context where you'd like to use toml set to set an array value? A concrete use case would be a helpful ingredient for thinking through the interface.

As illustrated in the TOML spec, a TOML array can contain a wide variety of types of values, and can mix types:

nested_mixed_array = [ [ 1, 2 ], ["a", "b", "c"] ]
mixed_floats_and_ints = [ 0.1, 0.2, 0.5, 1, 2, 5 ]
contributors = [
  "Foo Bar <[email protected]>",
  { name = "Baz Qux", email = "[email protected]", url = "https://example.com/bazqux" }
]

So ideally the interface here would both:

• make setting arbitrary arrays possible;
• make setting common kinds of arrays easy, and amenable to nice clean code.

Gauging the second part of that requires a guess as to what's common, which is where seeing a concrete use case comes in.

[lpil]

Yes please!

As for the syntax, I would parse the argument as toml and use as toml if it can be parsed. A --raw flag could be used to disable this.