local parser_config = require "nvim-treesitter.parsers".get_parser_configs()

parser_config.scala = {
  install_info = {
    url = "https://github.com/keynmol/tree-sitter-scala", -- local path or git repo
    files = { "src/parser.c", "src/scanner.c" },
    -- optional entries:
    branch = "test-scala3", -- default branch in case of git repo if different from master
    generate_requires_npm = true, -- if stand-alone parser without npm dependencies
    requires_generate_from_grammar = true, -- if folder contains pre-generated src/parser.c
  },
  filetype = "scala", -- if filetype does not agrees with parser name
  used_by = { "scala", "sbt" } -- additional filetypes that use this parser
}

my PRs sat for weeks