nvim/util: reorganize to allow for multiple submodules

This change moves the original module loading utilities to
util/mload.lua, while providing a shim object that lazily attempts to
locate a function that matches the name of the indexed object.

This changes allows me to better organize utility functions

nvim/lua/psoxizsh/util/init.lua

@@ -0,0 +1,49 @@
+
+local Util = { mt = {} }
+local Lazy = { mt = {} }
+
+local Submodules = {
+  mload = 'psoxizsh.util.mload',
+}
+
+function Util.new()
+  local this = { _submodules = Util.submodules() }
+  setmetatable(this, Util.mt)
+
+  return this
+end
+
+function Util.submodules()
+  local modules = {}
+
+  for key, mod in pairs(Submodules) do
+    modules[key] = Lazy.new(mod)
+  end
+
+  return modules
+end
+
+function Util.mt.__index(self, key)
+  for _, submod in pairs(self._submodules) do
+    if submod[key] then return submod[key] end
+  end
+
+  return nil
+end
+
+function Lazy.new(mod_name)
+  local this = { _module = false, _mod_name = mod_name }
+  setmetatable(this, Lazy.mt)
+
+  return this
+end
+
+function Lazy.mt.__index(self, key)
+  if not self._module then
+    self._module = require(self._mod_name)
+  end
+
+  return self._module[key]
+end
+
+return Util.new()

nvim/lua/psoxizsh/util/mload.lua

@@ -1,8 +1,8 @@
 
-local Util = {}
+local M = {}
 
 -- Reload a given module, returning the result of loading it.
-function Util.mreload(module)
+function M.mreload(module)
   if package.loaded[module] then
     package.loaded[module] = nil
   end
@@ -11,8 +11,8 @@ function Util.mreload(module)
 end
 
 -- Try reloading the given module, returning ok, module
-function Util.try_mreload(module)
-  return pcall(Util.mreload, module)
+function M.try_mreload(module)
+  return pcall(M.mreload, module)
 end
 
 -- Try reloading the given config module, returning either
@@ -26,7 +26,7 @@ end
 --
 -- It the latter cases, *configuration will not be reloaded*, this is
 -- primaraily meant for inline, static configuration
-function Util.try_mconfig(module)
+function M.try_mconfig(module)
   if type(module) ~= "string" then
     module = type(module) == "function" and module() or module
     module = type(module) == "table" and module or {}
@@ -34,7 +34,7 @@ function Util.try_mconfig(module)
     return module
   end
 
-  local ok, config = Util.try_mreload(module)
+  local ok, config = M.try_mreload(module)
   config = type(config) == "function" and config() or config
 
   return (ok and type(config) == "table") and config or {}
@@ -50,13 +50,13 @@ end
 -- 4. fn() --> table
 --
 -- It the latter cases, *configuration will not be reloaded*, this is
--- primaraily meant for inline, static configuration
+-- primarily meant for inline, static configuration
 --
 -- Note: the config returned from the given module may optionally
 -- set 'no_defaults = true' to opt out of the merging
-function Util.mconfig(module, defaults)
-  module = Util.try_mconfig(module)
-  defaults = Util.try_mconfig(defaults)
+function M.mconfig(module, defaults)
+  module = M.try_mconfig(module)
+  defaults = M.try_mconfig(defaults)
 
   if module.no_defaults then
     return module
@@ -65,4 +65,4 @@ function Util.mconfig(module, defaults)
   end
 end
 
-return Util
+return M