Module:Existsmod - Revision history

WikiGOD at 05:11, 2 May 2021

2021-05-02T05:11:08Z

← Older revision		Revision as of 05:11, 2 May 2021
Line 10:		Line 10:

	local checkType = require("libraryUtil").checkType		local checkType = require("libraryUtil").checkType
	local normalize = require("~~Dev~~:NormalizeModuleName")		local normalize = require("Module:NormalizeModuleName")
	local getArgs = require("~~Dev~~:Arguments").getArgs		local getArgs = require("Module:Arguments").getArgs

	function p.module_exists(name, foundVal, missingVal)		function p.module_exists(name, foundVal, missingVal)
	checkType("~~Dev~~:Existsmod", 1, name, "string", true)		checkType("Module:Existsmod", 1, name, "string", true)

	if name then		if name then

WikiGOD: 1 revision imported

2021-04-30T02:23:54Z

1 revision imported

← Older revision		Revision as of 02:23, 30 April 2021
(No difference)

Mediawiki>Magiczocker01 at 16:39, 24 April 2021

2021-04-24T16:39:28Z

New page

-- <nowiki>
--------------------------------------------------------------------------------
-- An inexpensive alternative to {{#ifexist}} which looks for a given module,
-- and returns one of two values depending on whether it was found.
--
-- Syntax:
-- {{#invoke:Existsmod|main|<module-name>|<value-if-found>|<value-if-missing>}}
--------------------------------------------------------------------------------
local p = {}

local checkType = require("libraryUtil").checkType
local normalize = require("Dev:NormalizeModuleName")
local getArgs = require("Dev:Arguments").getArgs

function p.module_exists(name, foundVal, missingVal)
checkType("Dev:Existsmod", 1, name, "string", true)

if name then
name = table.concat{normalize(name)}

if package.loaded[name] then
return foundVal
else
local _, val = pcall(package.loaders[2], name)

if type(val) == "function" or type(val) == "string" then
return foundVal
end
end
end

return missingVal
end

function p.main(frame)
local args = getArgs(frame)

return p.module_exists(args[1], args[2], args[3])
end

return p

-- </nowiki>
-- (Add categories here.)