feat: adds analyzer_web_port config which starts the LSP analysis server with the given port (#479)

Author: kaerumm

lua/flutter-tools/config.lua

@@ -43,6 +43,7 @@ local utils = lazy.require("flutter-tools.utils") ---@module "flutter-tools.util
 ---@field outline? {auto_open: boolean, open_cmd?: string}
 ---@field dev_log? flutter.DevLogOpts
 ---@field dev_tools? {autostart: boolean, auto_open_browser: boolean}
+---@field analyzer_web_port? number
 
 local M = {}
 

lua/flutter-tools/lsp/init.lua

@@ -232,6 +232,10 @@ local function get_server_config(user_config, callback)
 
     config.cmd = config.cmd or { paths.dart_bin, "language-server", "--protocol=lsp" }
 
+    if config.analyzer_web_port then
+      table.insert(config.cmd, "--port=" .. tostring(config.analyzer_web_port))
+    end
+
     config.filetypes = { FILETYPE }
     config.capabilities = merge_config(defaults.capabilities, config.capabilities)
     config.init_options = merge_config(defaults.init_options, config.init_options)