modlib/mod.lua

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-- get resource + dofile
function include(modname, file)
if not file then
file = modname
modname = minetest.get_current_modname()
end
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return dofile(get_resource(modname, file))
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end
function include_env(file_or_string, env, is_string)
setfenv(assert((is_string and loadstring or loadfile)(file_or_string)), env)()
end
function create_namespace(namespace_name, parent_namespace)
namespace_name = namespace_name or minetest.get_current_modname()
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parent_namespace = parent_namespace or _G
local namespace = setmetatable({}, {__index = parent_namespace})
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-- should use rawset if MT's strictness wasn't disabled in init.lua
parent_namespace[namespace_name] = namespace
return namespace
end
-- formerly extend_mod
function extend(modname, file)
if not file then
file = modname
modname = minetest.get_current_modname()
end
include_env(get_resource(modname, file .. ".lua"), _G[modname])
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end
-- runs main.lua in table env
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-- formerly include_mod
function init(modname)
modname = modname or minetest.get_current_modname()
create_namespace(modname)
extend(modname, "main")
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end
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function extend_string(modname, string)
if not string then
string = modname
modname = minetest.get_current_modname()
end
include_env(string, _G[modname], true)
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end
function configuration(modname)
modname = modname or minetest.get_current_modname()
local schema = modlib.schema.new(assert(include(modname, "schema.lua")))
schema.name = schema.name or modname
assert(schema.type == "table")
local overrides = {}
local conf
local function add(path)
for _, format in ipairs{
{extension = "lua", read = function(text)
assert(overrides._C == nil)
local additions = setfenv(assert(loadstring(text)), setmetatable(overrides, {__index = {_C = overrides}}))()
setmetatable(overrides, nil)
if additions == nil then
return overrides
end
return additions
end},
{extension = "luon", read = function(text)
local value = {setfenv(assert(loadstring("return " .. text)), setmetatable(overrides, {}))()}
assert(#value == 1)
value = value[1]
local function check_type(value)
local type = type(value)
if type == "table" then
assert(getmetatable(value) == nil)
for key, value in pairs(value) do
check_type(key)
check_type(value)
end
elseif not (type == "boolean" or type == "number" or type == "string") then
error("disallowed type " .. type)
end
end
check_type(value)
return value
end},
{extension = "conf", read = function(text) return Settings(text):to_table() end, convert_strings = true},
{extension = "json", read = minetest.parse_json}
} do
local content = modlib.file.read(path .. "." .. format.extension)
if content then
overrides = modlib.table.deep_add_all(overrides, format.read(content))
conf = schema:load(overrides, {convert_strings = format.convert_strings, error_message = true})
end
end
end
add(minetest.get_worldpath() .. "/conf/" .. modname)
add(get_resource(modname, "conf"))
local minetest_conf = modlib.conf.settings[schema.name]
if minetest_conf then
overrides = modlib.table.deep_add_all(overrides, minetest_conf)
conf = schema:load(overrides, {convert_strings = true, error_message = true})
end
if conf == nil then
return schema:load({}, {error_message = true})
end
return conf
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end