add helper function for {eatable}

agave.lua

@@ -14,7 +14,7 @@ local S = wine.S
 
 -- blue agave
 minetest.register_node("wine:blue_agave", {
-	description = S("Blue Agave") .. " (♥2)",
+	description = S("Blue Agave"),
 	drawtype = "plantlike",
 	visual_scale = 0.8,
 	tiles = {"wine_blue_agave.png"},
@@ -28,7 +28,7 @@ minetest.register_node("wine:blue_agave", {
 		type = "fixed",
 		fixed = {-0.2, -0.5, -0.2, 0.2, 0.3, 0.2}
 	},
-	groups = {snappy = 3, attached_node = 1, plant = 1, eatable = 2},
+	groups = {snappy = 3, attached_node = 1, plant = 1},
 	sounds = snd_l,
 
 	on_use = minetest.item_eat(2),
@@ -73,6 +73,7 @@ minetest.register_node("wine:blue_agave", {
 	end
 })
 
+wine.add_eatable("wine:blue_agave", 2)
 
 -- blue agave into cyan dye
 if minetest.get_modpath("mcl_dye") then

init.lua

@@ -69,13 +69,34 @@ function wine:add_item(list)
 	end
 end
 
+-- helper function
+
+local mod_tt_base = minetest.get_modpath("tt_base")
+
+function wine.add_eatable(item, hp)
+
+	local def = minetest.registered_items[item]
+
+	if def then
+
+		local grps = def.groups or {}
+
+		grps.eatable = hp ; grps.flammable = 2
+
+		if mod_tt_base == nil then
+			def.description = def.description .. " (♥" .. hp .. ")"
+		end
+
+		minetest.override_item(item, {description = def.description, groups = grps})
+	end
+end
 
 -- add drink with bottle
 function wine:add_drink(name, desc, has_bottle, num_hunger, num_thirst, alcoholic)
 
 	-- glass
 	minetest.register_node("wine:glass_" .. name, {
-		description = S("Glass of " .. desc) .. " (♥" .. num_hunger .. ")",
+		description = S("Glass of " .. desc),
 		drawtype = "plantlike",
 		visual_scale = 0.5,
 		tiles = {"wine_" .. name .. "_glass.png"},
@@ -90,7 +111,7 @@ function wine:add_drink(name, desc, has_bottle, num_hunger, num_thirst, alcoholi
 			fixed = {-0.15, -0.5, -0.15, 0.15, 0, 0.15}
 		},
 		groups = {
-			vessel = 1, dig_immediate = 3, eatable = num_hunger,
+			vessel = 1, dig_immediate = 3,
 			attached_node = 1, drink = 1, alcohol = alcoholic
 		},
 		sounds = snd_g,
@@ -109,6 +130,8 @@ function wine:add_drink(name, desc, has_bottle, num_hunger, num_thirst, alcoholi
 		end
 	})
 
+	wine.add_eatable("wine:glass_" .. name, num_hunger)
+
 	-- bottle
 	if has_bottle then