Sware: 1 revision imported

2025-11-04T17:47:19Z

1 revision imported

← Older revision	Revision as of 17:47, 4 November 2025
(No difference)

Sware: Created page with "local export = {} local load_data = mw.loadData local loaded = package.loaded local main_loader = package.loaders[2] local require = require local setmetatable = setmetatable local loaders, loaded_data, mt local function get_mt() mt, get_mt = {__mode = "kv"}, nil return mt end -- main_loader returns a loader function if the module exists, or nil if it doesn't. local function get_loader(modname) if loaders == nil then local loader = main_loader(modname) loaders..."

2025-01-08T12:31:42Z

Created page with "local export = {} local load_data = mw.loadData local loaded = package.loaded local main_loader = package.loaders[2] local require = require local setmetatable = setmetatable local loaders, loaded_data, mt local function get_mt() mt, get_mt = {__mode = "kv"}, nil return mt end -- main_loader returns a loader function if the module exists, or nil if it doesn't. local function get_loader(modname) if loaders == nil then local loader = main_loader(modname) loaders..."

← Older revision	Revision as of 12:31, 8 January 2025
(No difference)

wikt>Theknightwho at 23:17, 15 December 2024

2024-12-15T23:17:38Z

New page

local export = {}

local load_data = mw.loadData
local loaded = package.loaded
local main_loader = package.loaders[2]
local require = require
local setmetatable = setmetatable

local loaders, loaded_data, mt

local function get_mt()
mt, get_mt = {__mode = "kv"}, nil
return mt
end

-- main_loader returns a loader function if the module exists, or nil if it doesn't.
local function get_loader(modname)
if loaders == nil then
local loader = main_loader(modname)
loaders = setmetatable({[modname] = loader or false}, mt or get_mt())
return loader
end
local loader = loaders[modname]
if loader == nil then
loader = main_loader(modname)
loaders[modname] = loader or false
end
return loader or nil
end

local function get_data(modname, loader)
if loaded_data == nil then
local data = load_data(modname)
loaded_data = setmetatable({[loader] = data}, mt or get_mt())
return data
end
local data = loaded_data[loader]
if data == nil then
data = load_data(modname)
loaded_data[loader] = data
end
return data
end

--[==[
Like `require`, but returns `nil` if a module does not exist, instead of throwing an error.

Outputs are cached, which is faster for all modules, but much faster for nonexistent modules, since `require` will attempt to use the full loader each time because loading failures don't get cached.]==]
function export.safe_require(modname)
local mod = loaded[modname]
if mod == nil and get_loader(modname) then
-- Call with require instead of the loader directly, as it protects against infinite loading loops.
return require(modname)
end
return mod
end

--[==[
Like `mw.loadData`, but it does not generate a new table each time the same module is loaded via this function. Instead, it caches the returned data so that the same table can be returned each time, which is more efficient.]==]
function export.load_data(modname)
return get_data(modname, get_loader(modname))
end

--[==[
Like `export.load_data` (itself a variant of `mw.loadData`), but returns `nil` if a module does not exist, instead of throwing an error.

Outputs are cached, which is faster for all modules, but much faster for nonexistent modules, since `mw.loadData` will attempt to use the full loader each time because loading failures don't get cached.]==]
function export.safe_load_data(modname)
local loader = get_loader(modname)
if loader == nil then
return nil
end
return get_data(modname, loader)
end

return export

Module:load - Revision history

Sware: 1 revision imported

wikt>Theknightwho at 23:17, 15 December 2024