Break nodes into API and definitions

init.lua

@@ -7,7 +7,8 @@ local modname = minetest.get_current_modname()
 rawset(_G, modname, {})
 
 include("names")
-include("node")
+include("nodeapi")
+include("nodedefs")
 include("migrate")
 include("item")
 include("ore")

nodeapi.lua

@@ -239,21 +239,6 @@ function myapi.register_cat_spots(id, base, spot, ...)
 	return myapi.register_cat(id, {txr}, ...)
 end
 
-local function reg(legacyid, desc, ...)
-	myapi.register_cat_spots(desc, ...)
-	local id = desc2name(desc)
-	for _, n in ipairs({":cat_", ":longcat_front_", ":longcat_mid_", ":longcat_back_"}) do
-		minetest.register_alias(modname .. n .. legacyid, modname .. n .. id)
-	end
-end
-reg(1, "Light Gray", "#c0c0c0", "#404040")
-reg(2, "Medium Gray", "#404040", "#202020")
-reg(3, "Dark Gray", "#202020", "#101010")
-reg(4, "Dark Orange", "#ff8000", "#804000")
-reg(5, "Light Orange", "#e0c040", "#ff8000")
-reg(6, "Dark Brown", "#804000", "#402000")
-reg(7, "Light Brown", "#c0a080", "#806020")
-
 function myapi.makecat(pos, param2, creator)
 	local all = {}
 	for k, v in pairs(minetest.registered_nodes) do

nodedefs.lua

@@ -0,0 +1,26 @@
+-- LUALOCALS < ---------------------------------------------------------
+local ipairs, minetest, string
+    = ipairs, minetest, string
+local string_gsub, string_lower
+    = string.gsub, string.lower
+-- LUALOCALS > ---------------------------------------------------------
+
+local modname = minetest.get_current_modname()
+local myapi = _G[modname]
+
+local function desc2name(s) return string_gsub(string_lower(s), "%W+", "_") end
+
+local function reg(legacyid, desc, ...)
+	myapi.register_cat_spots(desc, ...)
+	local id = desc2name(desc)
+	for _, n in ipairs({":cat_", ":longcat_front_", ":longcat_mid_", ":longcat_back_"}) do
+		minetest.register_alias(modname .. n .. legacyid, modname .. n .. id)
+	end
+end
+reg(1, "Light Gray", "#c0c0c0", "#404040")
+reg(2, "Medium Gray", "#404040", "#202020")
+reg(3, "Dark Gray", "#202020", "#101010")
+reg(4, "Dark Orange", "#ff8000", "#804000")
+reg(5, "Light Orange", "#e0c040", "#ff8000")
+reg(6, "Dark Brown", "#804000", "#402000")
+reg(7, "Light Brown", "#c0a080", "#806020")