refactor: use vim.g config and lazy loading

Replace setup() with vim.g.live_server configuration. Add plugin/ file
with load guard and user commands for proper lazy loading.

lua/live-server.lua

@@ -1,24 +1,48 @@
 local M = {}
 
+local initialized = false
+local job_cache = {}
+
+local defaults = {
+  args = { '--port=5555' },
+}
+
+local config = vim.deepcopy(defaults)
+
 local function log(message, level)
-    vim.notify(
-        string.format('live-server.nvim: %s', message),
-        vim.log.levels[level]
-    )
+  vim.notify(string.format('live-server.nvim: %s', message), vim.log.levels[level])
 end
 
-local job_cache = {}
+local function is_windows()
+  return vim.loop.os_uname().version:match('Windows')
+end
+
+local function init()
+  if initialized then
+    return true
+  end
+
+  local user_config = vim.g.live_server or {}
+  config = vim.tbl_deep_extend('force', defaults, user_config)
+
+  if not vim.fn.executable('live-server') and not (is_windows() and vim.fn.executable('live-server.cmd')) then
+    log('live-server is not executable. Ensure the npm module is properly installed', 'ERROR')
+    return false
+  end
+
+  initialized = true
+  return true
+end
 
 local function find_cached_dir(dir)
   if not dir then
-        vim.notify("live-server.nvim: No directory provided to find_cached_dir()", vim.log.levels.ERROR)
-        return
+    return nil
   end
 
   local cur = dir
   while not job_cache[cur] do
-        if cur == '/' or string.match(cur, '^[A-Z]:\\$') then
-            return
+    if cur == '/' or cur:match('^[A-Z]:\\$') then
+      return nil
     end
     cur = vim.fn.fnamemodify(cur, ':h')
   end
@@ -30,92 +54,47 @@ local function is_running(dir)
   return cached_dir and job_cache[cached_dir]
 end
 
--- Detect if OS is Windows
-local function is_windows()
-    return vim.loop.os_uname().version:match("Windows")
+local function resolve_dir(dir)
+  if not dir or dir == '' then
+    dir = '%:p:h'
   end
-
-M.config = {
-    -- 8080 default is commonly used, here 5555
-    args = { '--port=5555' },
-}
-
-M.toggle = function(dir)
-    local running = is_running(dir)
-    if not running then
-        M.start(dir)
-        return
-    end
-    M.stop(dir)
-end
-
-M.setup = function(user_config)
-    M.config = vim.tbl_deep_extend('force', M.config, user_config or {})
-
-    if not vim.fn.executable('live-server') and not (is_windows() and vim.fn.executable('live-server.cmd')) then
-        log(
-            'live-server is not executable. Ensure the npm module is properly installed',
-            vim.log.levels.ERROR
-        )
-        return
-    end
-
-    local function find_dir(args)
-        local dir = args ~= '' and args or '%:p:h'
   return vim.fn.expand(vim.fn.fnamemodify(vim.fn.expand(dir), ':p'))
 end
 
-    vim.api.nvim_create_user_command('LiveServerStart', function(opts)
-        M.start(find_dir(opts.args))
-    end, { nargs = '?' })
-    vim.api.nvim_create_user_command('LiveServerStop', function(opts)
-        M.stop(find_dir(opts.args))
-    end, { nargs = '?' })
-    vim.api.nvim_create_user_command('LiveServerToggle', function(opts)
-        M.toggle(find_dir(opts.args))
-    end, { nargs = '?' })
+function M.start(dir)
+  if not init() then
+    return
   end
 
-M.start = function(dir)
-    local running = is_running(dir)
+  dir = resolve_dir(dir)
 
-    if running then
+  if is_running(dir) then
     log('live-server already running', 'INFO')
     return
   end
 
-    local cmd_exe = 'live-server'
-    if is_windows() then
-        cmd_exe = 'live-server.cmd'
-    end
-
+  local cmd_exe = is_windows() and 'live-server.cmd' or 'live-server'
   local cmd = { cmd_exe, dir }
-    vim.list_extend(cmd, M.config.args)
+  vim.list_extend(cmd, config.args)
 
   local job_id = vim.fn.jobstart(cmd, {
     on_stderr = function(_, data)
       if not data or data[1] == '' then
         return
       end
-
-            -- Remove color from error if present
       log(data[1]:match('.-m(.-)\27') or data[1], 'ERROR')
     end,
     on_exit = function(_, exit_code)
       job_cache[dir] = nil
-
-            -- instance killed with SIGTERM
       if exit_code == 143 then
         return
       end
-
       log(string.format('stopped with code %s', exit_code), 'INFO')
     end,
   })
 
-     -- Extract port from args
   local port = 'unknown'
-    for _, arg in ipairs(M.config.args) do
+  for _, arg in ipairs(config.args) do
     local p = arg:match('%-%-port=(%d+)')
     if p then
       port = p
@@ -127,17 +106,23 @@ M.start = function(dir)
   job_cache[dir] = job_id
 end
 
-M.stop = function(dir)
-    local running = is_running(dir)
-
-    if running then
+function M.stop(dir)
+  dir = resolve_dir(dir)
   local cached_dir = find_cached_dir(dir)
-        if cached_dir then
+  if cached_dir and job_cache[cached_dir] then
     vim.fn.jobstop(job_cache[cached_dir])
     job_cache[cached_dir] = nil
     log('live-server stopped', 'INFO')
   end
 end
+
+function M.toggle(dir)
+  dir = resolve_dir(dir)
+  if is_running(dir) then
+    M.stop(dir)
+  else
+    M.start(dir)
+  end
 end
 
 return M

plugin/live-server.lua

@@ -0,0 +1,16 @@
+if vim.g.loaded_live_server then
+  return
+end
+vim.g.loaded_live_server = 1
+
+vim.api.nvim_create_user_command('LiveServerStart', function(opts)
+  require('live-server').start(opts.args)
+end, { nargs = '?' })
+
+vim.api.nvim_create_user_command('LiveServerStop', function(opts)
+  require('live-server').stop(opts.args)
+end, { nargs = '?' })
+
+vim.api.nvim_create_user_command('LiveServerToggle', function(opts)
+  require('live-server').toggle(opts.args)
+end, { nargs = '?' })