fix: fixes LspRestart command on nightly

lua/typescript-tools/rpc.lua

@@ -5,16 +5,20 @@ local autocommands = require "typescript-tools.autocommands"
 local custom_handlers = require "typescript-tools.custom_handlers"
 local request_router = require "typescript-tools.request_router"
 local internal_commands = require "typescript-tools.internal_commands"
+local utils = require "typescript-tools.utils"
 
 local M = {}
 
 ---@param dispatchers Dispatchers
 ---@return LspInterface
 function M.start(dispatchers)
-  local tsserver_syntax = Tsserver.new("syntax", dispatchers)
+  local modified_dispatchers = vim.deepcopy(dispatchers)
+  modified_dispatchers.on_exit = utils.run_once(dispatchers.on_exit) -- INFO: multiple calls to on_exit causes errors in nvim lsp
+
+  local tsserver_syntax = Tsserver.new("syntax", modified_dispatchers)
   local tsserver_semantic = nil
   if plugin_config.separate_diagnostic_server then
-    tsserver_semantic = Tsserver.new("semantic", dispatchers)
+    tsserver_semantic = Tsserver.new("semantic", modified_dispatchers)
   end
 
   autocommands.setup_autocommands(dispatchers)

lua/typescript-tools/types.lua

@@ -2,6 +2,7 @@
 ---@field notification fun(method: string, params: table)
 ---@field server_request fun(method: string, params: table): nil, table
 ---@field on_exit fun(code: number, signal: number)
+---@field on_error fun(code: number, ...: unknown)
 
 ---@alias LspCallback fun(err: any, result: any)
 

lua/typescript-tools/utils.lua

@@ -117,4 +117,16 @@ function M.add_reverse_lookup(tbl)
   end
 end
 
+-- Returns a function that only runs the given function once.
+--- @param func function
+function M.run_once(func)
+  local ran = false
+  return function(...)
+    if not ran then
+      ran = true
+      return func(...)
+    end
+  end
+end
+
 return M