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---@brief
---
--- A kotlin language server which was developed for internal usage and
--- released afterwards. Maintaining is not done by the original author,
--- but by fwcd.
---
--- It is built via gradle and developed on github.
--- Source and additional description:
--- https://github.com/fwcd/kotlin-language-server
---
--- This server requires vim to be aware of the kotlin-filetype.
--- You could refer for this capability to:
--- https://github.com/udalov/kotlin-vim (recommended)
--- Note that there is no LICENSE specified yet.
---
--- For faster startup, you can setup caching by specifying a storagePath
--- in the init_options. The default is your home directory.

--- The presence of one of these files indicates a project root directory
--
--  These are configuration files for the various build systems supported by
--  Kotlin. I am not sure whether the language server supports Ant projects,
--  but I'm keeping it here as well since Ant does support Kotlin.
local root_files = {
  'settings.gradle', -- Gradle (multi-project)
  'settings.gradle.kts', -- Gradle (multi-project)
  'build.xml', -- Ant
  'pom.xml', -- Maven
  'build.gradle', -- Gradle
  'build.gradle.kts', -- Gradle
}

---@type vim.lsp.Config
return {
  filetypes = { 'kotlin' },
  root_markers = root_files,
  cmd = { 'kotlin-language-server' },
  init_options = {
    -- Enables caching and use project root to store cache data.
    storagePath = vim.fs.root(vim.fn.expand '%:p:h', root_files),
  },
}