add descriptive names to ABM calls

can be specified by label= in the biome table
else biome_lib will try to make up something useful
fix #1

API.txt

@@ -72,6 +72,7 @@ biome = {
 	---- most likely want to use at least some of these to limit how and
 	---- where your objects are spawned.
 
+	label = string,		-- set this to identify the ABM for Minetest's profiler
 	avoid_nodes = {table},	-- same meaning as savoid, above
 	avoid_radius = num,	-- same as sradius
 	seed_diff = num,	-- The Perlin seed difference value passed to the
@@ -342,14 +343,18 @@ into something else over time.  This function has no return value, and accepts
 a biome definition table as the only parameter.  These are defined like so:
 
 options = {
-	grow_plant = "string", -- Name of the node to be grown into something
+	label = string,		-- set this to identify the ABM for Minetest's
-						-- else.  This value is passed to the ABM as the
+						-- profiler.  If not set, biome_lib will set it to 
-						-- "nodenames" parameter, so it is the plants
+						-- "biome_lib grow_plants(): " appended with the node
-						-- themselves that are the ABM trigger, rather than
+						-- in grow_plant (or the first item if it's a table)
+	grow_plant = "string" or {table}, -- Name(s) of the node(s) to be grown
+						-- into something else.  This value is passed to the
+						-- ABM as the "nodenames" parameter, so the plants
+						-- themselves are the ABM trigger, rather than
 						-- the ground they spawned on.  A plant will only grow
-						-- if the node above it is air.  Can also be a table,
+						-- if the node above it is air.  If you use a table,
-						-- but note that all nodes referenced therein will be
+						-- note that all nodes referenced therein will be
-						-- grown into the same object.
+						-- grown into the same final object.
 	grow_delay = num,	-- Passed as the ABM "interval" parameter, as with
 						-- spawning.
 	grow_chance = num,	-- Passed as the ABM "chance" parameter.

init.lua

@@ -501,11 +501,20 @@ function biome_lib:spawn_on_surfaces(sd,sp,sr,sc,ss,sa)
 	biome_lib:set_defaults(biome)
 	biome.spawn_plants_count = #(biome.spawn_plants)
 
+	local n
+	if type(biome.spawn_plants) == "table" then
+		n = "random: "..biome.spawn_plants[1]..", ..."
+	else
+		n = biome.spawn_plants
+	end
+	biome.label = biome.label or "biome_lib spawn_on_surfaces(): "..n
+
 	minetest.register_abm({
 		nodenames = biome.spawn_surfaces,
 		interval = biome.interval,
 		chance = biome.spawn_chance,
 		neighbors = biome.neighbors,
+		label = biome.label,
 		action = function(pos, node, active_object_count, active_object_count_wider)
 			local p_top = { x = pos.x, y = pos.y + 1, z = pos.z }	
 			local n_top = minetest.get_node(p_top)
@@ -583,6 +592,16 @@ function biome_lib:grow_plants(opts)
 	options.grow_nodes = options.grow_nodes or { "default:dirt_with_grass" }
 	options.seed_diff = options.seed_diff or 0
 
+	local n
+
+	if type(options.grow_plant) == "table" then
+		n = "multi: "..options.grow_plant[1]..", ..."
+	else
+		n = options.grow_plant
+	end
+
+	options.label = options.label or "biome_lib grow_plants(): "..n
+
 	if options.grow_delay*time_scale >= 1 then
 		options.interval = options.grow_delay*time_scale
 	else
@@ -593,6 +612,7 @@ function biome_lib:grow_plants(opts)
 		nodenames = { options.grow_plant },
 		interval = options.interval,
 		chance = options.grow_chance,
+		label = options.label,
 		action = function(pos, node, active_object_count, active_object_count_wider)
 			local p_top = {x=pos.x, y=pos.y+1, z=pos.z}
 			local p_bot = {x=pos.x, y=pos.y-1, z=pos.z}