modlib/init.lua

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local modules = {}
for _, file in pairs{
"schema",
"file",
"func",
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"less_than",
"iterator",
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"math",
"table",
"vararg",
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"text",
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"utf8",
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"vector",
"quaternion",
"trie",
"kdtree",
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"hashlist",
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"hashheap",
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"heap",
"binary",
"b3d",
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"json",
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"luon",
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"bluon",
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"persistence",
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"debug",
"web"
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} do
modules[file] = file
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end
if minetest then
modules.minetest = "minetest"
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end
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-- modlib.mod is an alias for modlib.minetest.mod
modules.string = "text"
modules.number = "math"
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local parent_dir
if not minetest then
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-- TOFIX
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local init_path = arg and arg[0]
parent_dir = init_path and init_path:match"^.[/\\]" or ""
end
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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
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-- 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, ...}
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end
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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
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modlib = setmetatable({}, { __index = load_module })
-- TODO bump on release
modlib.version = 98
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
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-- 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
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if minetest then
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-- 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
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-- HACK force load minetest/gametime.lua to ensure that the globalstep is registered earlier than globalsteps of mods depending on modlib
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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
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end
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-- Run build scripts
-- dofile(modlib.mod.get_resource("modlib", "build", "html_entities.lua"))
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-- TODO verify localizations suffice
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return modlib