(#62) Add version information to metatool namespace

metatool/init.lua

@@ -13,15 +13,28 @@
 
 -- initialize namespace and core functions
 metatool = {
+	version_str = "2.0.0",
+	version = nil,
 	configuration_file = minetest.get_worldpath() .. '/metatool.cfg',
 	export_default_config = minetest.settings:get_bool("metatool_export_default_config", true),
 	modpath = minetest.get_modpath('metatool'),
 	S = string.format
 }
+
+local version_matcher = metatool.version_str:gmatch("%d+")
+metatool.version = {
+	major = tonumber(version_matcher()),
+	minor = tonumber(version_matcher()),
+	patch = tonumber(version_matcher()),
+}
+assert(type(metatool.version.major) == "number", "Invalid Metatool version_str major")
+assert(type(metatool.version.minor) == "number", "Invalid Metatool version_str minor")
+assert(type(metatool.version.patch) == "number", "Invalid Metatool version_str patch")
+
 dofile(metatool.modpath .. '/util.lua')
 dofile(metatool.modpath .. '/settings.lua')
 dofile(metatool.modpath .. '/api.lua')
 dofile(metatool.modpath .. '/command.lua')
 dofile(metatool.modpath .. '/formspec.lua')
 
-print('[OK] MetaTool loaded')
+print('[OK] MetaTool ' .. metatool.version_str .. ' loaded')