refactor: address emmylua diagnostics

lua/pack.lua

@@ -1,7 +1,11 @@
 local log = require("log")
 local util = require("util")
 
-local plugins_dir = vim.fs.joinpath(vim.fn.stdpath("config"), "plugins")
+local config_dir = vim.fn.stdpath("config")
+if type(config_dir) == "table" then
+    config_dir = assert(config_dir[1])
+end
+local plugins_dir = vim.fs.joinpath(config_dir, "plugins")
 
 ---@param path string
 ---@return boolean success
@@ -111,7 +115,7 @@ end
 ---@param plugin ow.Pack.Plugin
 local function run_ts_build(plugin)
     local ts = require("ts")
-    for _, p in ipairs(ts.normalize(plugin.ts_parser)) do
+    for _, p in ipairs(ts.normalize(assert(plugin.ts_parser))) do
         ts.build(plugin, p)
     end
 end
@@ -149,9 +153,8 @@ end
 
 ---@type uv.uv_fs_event_t?
 local watcher = nil
-
----@type (fun(filename: string) | ow.Util.KeyedDebouncer<string>)?
-local reload = nil
+---@type ow.Util.KeyedDebounceHandle<string>?
+local on_change_handle = nil
 
 ---@class ow.Pack
 ---@field plugins ow.Pack.Plugin[]
@@ -174,7 +177,7 @@ function M.get_paths()
 end
 
 ---@param name string
-function M.reload(name)
+function M.reload_plugin(name)
     load(name, true)
 end
 
@@ -184,29 +187,40 @@ function M.watch()
     end
 
     watcher = assert(vim.uv.new_fs_event())
-    reload = util.keyed_debounce(function(filename)
-        local path = vim.fs.joinpath(plugins_dir, filename)
-        if not vim.uv.fs_stat(path) then
-            return
-        end
-        local ok, load_err = exec(path)
-        if ok then
-            log.info("Reloaded %s", filename)
-        else
-            log.error("Failed to reload %s: %s", filename, load_err)
-        end
-    end, 100)
+    local on_change, handle = util.keyed_debounce(
+        ---@param filename string
+        function(filename)
+            local path = vim.fs.joinpath(plugins_dir, filename)
+            if not vim.uv.fs_stat(path) then
+                return
+            end
+            local ok, load_err = exec(path)
+            if ok then
+                log.info("Reloaded %s", filename)
+            else
+                log.error("Failed to reload %s: %s", filename, load_err)
+            end
+        end,
+        200
+    )
+    on_change_handle = handle
 
-    assert(watcher:start(plugins_dir, {}, function(err, filename)
-        if err then
-            log.error("Watch error: %s", err)
-            return
+    assert(watcher:start(
+        plugins_dir,
+        {},
+        ---@param err string?
+        ---@param filename string
+        function(err, filename)
+            if err then
+                log.error("Watch error: %s", err)
+                return
+            end
+            if not filename or not filename:match("%.lua$") then
+                return
+            end
+            on_change(filename)
         end
-        if not filename or not filename:match("%.lua$") then
-            return
-        end
-        reload(filename)
-    end))
+    ))
 end
 
 function M.unwatch()
@@ -214,14 +228,13 @@ function M.unwatch()
         return
     end
 
-    if reload then
-        reload:close()
-        reload = nil
-    end
-
     watcher:stop()
     watcher:close()
     watcher = nil
+    if on_change_handle then
+        on_change_handle.close()
+        on_change_handle = nil
+    end
 end
 
 ---@param specs (string | ow.Pack.PluginSpec)[]