dotfiles/.config/nixpkgs/neovim/lsp.lua

vim.diagnostic.config({
  -- only show virtual text for WARN and higher
  virtual_text = { severity = { min = vim.diagnostic.severity.WARN } },
})

vim.lsp.config("*", {
  flags = {
    debounce_text_changes = 250,
  }
})

vim.lsp.enable("bashls");
vim.lsp.enable("eslint");

if vim.fn.executable("dprint") == 1 then
  local version = vim.version.parse(vim.fn.system("dprint --version"))
  if vim.version.cmp(version, {0,45,0}) >= 0 then
    vim.lsp.enable("dprint")
  end
end

if vim.fn.executable("deno") == 1 then
  vim.lsp.enable("deno");
else
  local function make_settings()
    -- we disable formatting but these are still used when performing some code
    -- actions
    local format = {
      indentSize = vim.bo.shiftwidth,
      convertTabsToSpaces = vim.o.expandtab,
    }
    return {
      javascript = { format = format },
      typescript = { format = format },
    }
  end

  vim.lsp.config("ts_ls", {
    init_options = {
      completionDisableFilterText = true,
      preferences = {
        importModuleSpecifierPreference = 'non-relative',
        -- this prevents renames from aliasing when destructuring
        providePrefixAndSuffixTextForRename = false,
      },
    },
    settings = make_settings(),
    handlers = {
      ['$/typescriptVersion'] = function(err, result, ctx, config)
        vim.notify(string.format('Typescript %s', result.version))
      end,
    },
    on_init = function(client)
      -- mark tsserver as not having formatting available as we rely on
      -- eslint and dprint for that
      client.server_capabilities.documentFormattingProvider = false
      client.server_capabilities.documentRangeFormattingProvider = false

      -- we only really know our settings once we've opened a file so report
      -- the new formatting settings
      client:notify(vim.lsp.protocol.Methods.workspace_didChangeConfiguration, {
        settings = make_settings(),
      })
    end,
  })
  vim.lsp.enable("ts_ls")
end

if vim.fn.executable("gopls") == 1 then
  vim.lsp.enable("gopls")
end

if vim.fn.executable("ruby-lsp") == 1 then
  vim.lsp.config("ruby_lsp", {
    init_options = {
      enabledFeatures = {
        formatting = false,
      },
    }
  })
  vim.lsp.enable("ruby_lsp")
end

if vim.fn.executable("nil") == 1 then
  vim.lsp.enable("nil_ls")
end

if vim.fn.executable("jdtls") == 1 then
  vim.lsp.config("jdtls", {
    handlers = {
      ["$/progress"] = function()
        -- this is quite noisy so just disable it
      end
    },
  })
  vim.lsp.enable("jdtls")
end

-- custom LSP servers
vim.lsp.config("elvish", {
  cmd = {'elvish', '--lsp'},
  filetypes = {'elvish'},
  settings = {},
})
vim.lsp.enable("elvish")