Make onions farmable.

nodes.lua

@@ -314,12 +314,6 @@ if mobs and mobs.mod == "redo" then
 		recipe = "fun_caves:meat_pie_uncooked"
 	})
 
-	minetest.register_craftitem("fun_caves:onion", {
-		description = "Onion",
-		inventory_image = "fun_caves_onion.png",
-		on_use = minetest.item_eat(2),
-	})
-
 	minetest.register_craftitem("fun_caves:meat_pie_slice", {
 		description = "Meat Pie Slice",
 		inventory_image = "fun_caves_meat_pie_slice.png",
@@ -335,6 +329,66 @@ if mobs and mobs.mod == "redo" then
 	})
 end
 
+farming.register_plant("fun_caves:onion", {
+	description = "Onion",
+	inventory_image = "fun_caves_onion.png",
+	steps = 3,
+	minlight = 13,
+	maxlight = default.LIGHT_MAX,
+	fertility = {"grassland"}
+})
+
+minetest.registered_items['fun_caves:seed_onion'] = nil
+minetest.registered_nodes['fun_caves:seed_onion'] = nil
+minetest.registered_craftitems['fun_caves:seed_onion'] = nil
+minetest.register_alias('fun_caves:seed_onion', 'fun_caves:onion')
+for i = 1, 3 do
+	local onion = minetest.registered_items['fun_caves:onion_'..i]
+	if onion then
+		onion.drop = {
+			max_items = i,
+			items = {
+				{ items = {'fun_caves:onion'}, rarity = 4 - i, },
+				{ items = {'fun_caves:onion'}, rarity = (4 - i) * 3, },
+				{ items = {'fun_caves:onion'}, rarity = (4 - i) * 6, },
+			},
+		}
+	end
+end
+
+minetest.register_node("fun_caves:onion", {
+	description = "Onion",
+	drawtype = "plantlike",
+	visual_scale = 0.75,
+	tiles = {"fun_caves_onion.png"},
+	inventory_image = "fun_caves_onion.png",
+	paramtype = "light",
+	sunlight_propagates = true,
+	walkable = false,
+	is_ground_content = false,
+	selection_box = {
+		type = "fixed",
+		fixed = {-0.2, -0.5, -0.2, 0.2, 0, 0.2}
+	},
+	fertility = {'grassland'},
+	groups = {seed = 1, fleshy = 3, dig_immediate = 3, flammable = 2},
+	on_use = minetest.item_eat(2),
+	sounds = default.node_sound_leaves_defaults(),
+	next_plant = 'fun_caves:onion_1',
+	on_timer = farming.grow_plant,
+	minlight = 10,
+	maxlight = 15,
+
+	on_place = function(itemstack, placer, pointed_thing)
+		local stack = farming.place_seed(itemstack, placer, pointed_thing, 'fun_caves:onion')
+		if stack then
+			return stack
+		end
+
+		return minetest.item_place(itemstack, placer, pointed_thing)
+	end,
+})
+
 minetest.register_craft({
 	output = 'fun_caves:apple_pie_uncooked',
 	type = 'shapeless',