feat: Support for pyproject.toml #582

I think the arrays in the values of the project.optional-dependencies are commutative as well?

I tried to build a query for that (my very first one, so don't judge too harshly^^):

(table
  (bare_key) @table_key (#eq? @table_key "project") 
  (pair
    (bare_key) @pair_key (#eq? @pair_key "optional-dependencies")
    (inline_table
      (pair
        _
        (array) @array
      )*
    )
  )
)

but when I tried running it on the following snippet:

[project]
optional-dependencies = {
  foo = ["one", "two", "three"]
  bar = ["four", "five", "six"]
}

only the second table (["four", "five", "six"]) got highlighted, whereas I thought that the * in (pair)* would make its inner pattern match each key-value pair, and thus extract all the tables.

One more complication with this is that the snippet above could, AFAICT, be written as follows as well (and that would probably even be the more common approach):

[project.optional-dependencies]
foo = ["one", "two", "three"]
bar = ["four", "five", "six"]

which the query above of course wouldn't match. So I did write a separate query:

(table
  (dotted_key
    (bare_key) @project (#eq? @project "project")
    (bare_key) @deps (#eq? @deps "optional-dependencies")
  )
  (pair
    (bare_key)
    (array) @array
  )*
)

and that one actually does match both arrays, but does that mean that we will need two queries just for this pattern alone? That sounds a bit unfortunate..

Somehow the TOML example you give above doesn't seem to parse with the tree-sitter grammar, nor with https://www.toml-lint.com/, and I'm not sure why (beyond the missing comma, perhaps, but that doesn't seem to fix it).

I'm adding the query for the second syntax, removing the * because it's not necessary: the query only needs to match one commutative child at a time (each commutative child will correspond to a different match of the overall query).

Somehow the TOML example you give above doesn't seem to parse with the tree-sitter grammar, nor with https://www.toml-lint.com/, and I'm not sure why (beyond the missing comma, perhaps, but that doesn't seem to fix it).

Ah, right, that's because inline tables are apparently required to be on one line, so the following does parse:

[project]
optional-dependencies = { foo = ["one", "two", "three"], bar = ["four", "five", "six"] }

removing the * because it's not necessary

I see! In fact removing it from the first query makes it highlight both commutative children as well!