modlib/init.lua
2023-04-02 15:10:53 +02:00

147 lines
3.6 KiB
Lua

local modules = {}
for _, file in pairs{
"schema",
"file",
"func",
"less_than",
"iterator",
"math",
"table",
"vararg",
"text",
"utf8",
"vector",
"matrix4",
"quaternion",
"trie",
"kdtree",
"hashlist",
"hashheap",
"heap",
"binary",
"b3d",
"json",
"luon",
"bluon",
"base64",
"persistence",
"debug",
"web"
} do
modules[file] = file
end
if minetest then
modules.minetest = "minetest"
end
-- modlib.mod is an alias for modlib.minetest.mod
modules.string = "text"
modules.number = "math"
local parent_dir
if not minetest then
-- TOFIX
local init_path = arg and arg[0]
parent_dir = init_path and init_path:match"^.[/\\]" or ""
end
local dir_delim = rawget(_G, "DIR_DELIM") -- Minetest
or (rawget(_G, "package") and package.config and assert(package.config:match("^(.-)[\r\n]"))) or "/"
local function concat_path(path)
return table.concat(path, dir_delim)
end
-- only used if Minetest is available
local function get_resource(modname, resource, ...)
if not resource then
resource = modname
modname = minetest.get_current_modname()
end
return concat_path{minetest.get_modpath(modname), resource, ...}
end
local function load_module(self, module_name_or_alias)
local module_name = modules[module_name_or_alias]
if not module_name then
-- no such module
return
end
local environment
if module_name ~= module_name_or_alias then
-- alias handling
environment = self[module_name]
else
environment = dofile(minetest
and get_resource(self.modname, module_name .. ".lua")
or (parent_dir .. module_name .. ".lua"))
end
self[module_name_or_alias] = environment
return environment
end
local rawget, rawset = rawget, rawset
modlib = setmetatable({}, { __index = load_module })
-- TODO bump on release
modlib.version = 102
if minetest then
modlib.modname = minetest.get_current_modname()
end
-- Raw globals
modlib._RG = setmetatable({}, {
__index = function(_, index)
return rawget(_G, index)
end,
__newindex = function(_, index, value)
return rawset(_G, index, value)
end
})
-- Globals merged with modlib
modlib.G = setmetatable({}, {__index = function(self, module_name)
local module = load_module(self, module_name)
if module == nil then
return _G[module_name]
end
if _G[module_name] then
setmetatable(module, {__index = _G[module_name]})
end
return module
end})
-- "Imports" modlib by changing the environment of the calling function
--! This alters environments at the expense of performance. Use with caution.
--! Prefer localizing modlib library functions or API tables if possible.
function modlib.set_environment()
setfenv(2, setmetatable({}, {__index = modlib.G}))
end
-- Force load file module to pass dir_delim & to set concat_path
modlib.file = assert(loadfile(get_resource"file.lua"))(dir_delim)
modlib.file.concat_path = concat_path
if minetest then
-- Force-loading of the minetest & mod modules
-- Also sets modlib.mod -> modlib.minetest.mod alias.
local ml_mt = modlib.minetest
ml_mt.mod.get_resource = get_resource
modlib.mod = ml_mt.mod
-- HACK force load minetest/gametime.lua to ensure that the globalstep is registered earlier than globalsteps of mods depending on modlib
dofile(get_resource(modlib.modname, "minetest", "gametime.lua"))
local ie = minetest.request_insecure_environment()
if ie then
-- Force load persistence namespace to pass insecure require
-- TODO currently no need to set _G.require, lsqlite3 loads no dependencies that way
modlib.persistence = assert(loadfile(get_resource"persistence.lua"))(ie.require)
end
end
-- Run build scripts
-- dofile(modlib.mod.get_resource("modlib", "build", "html_entities.lua"))
-- TODO verify localizations suffice
return modlib