Renamed the "plants" module to "plants_lib". Any modder that directly depends

on that library need only adjust their mods' depends.txt files.  I've already
done this for flowers, junglegrass and poisonivy as included in this modpack,
so any mod that depends on one of *those* needs no changes at all.  No changes
to the API or any functionality.

flowers/depends.txt

@@ -1 +1 @@
-plants
+plants_lib

junglegrass/depends.txt

@@ -1 +1 @@
-plants
+plants_lib

plants_lib/depends.txt

@@ -0,0 +1 @@
+default

plants_lib/init.lua

@@ -0,0 +1,166 @@
+-- Plantlife mod by Vanessa Ezekowitz
+-- 2012-11-29
+--
+-- This mod combines all of the functionality from poison ivy,
+-- flowers, and jungle grass.  If you have any of these, you no
+-- longer need them.
+--
+-- License:
+--	CC-BY-SA for most textures, except flowers
+--	WTFPL for the flowers textures
+--	WTFPL for all code and everything else
+
+-- Various settings - most of these probably won't need to be changed
+
+local plantlife_debug = false  -- ...unless you want the modpack to spam the console ;-)
+
+local plantlife_seed_diff = 123
+local perlin_octaves = 3
+local perlin_persistence = 0.2
+local perlin_scale = 25
+
+local plantlife_limit = 0.1 -- compared against perlin noise.  lower = more abundant
+
+local flowers_seed_diff = plantlife_seed_diff
+local junglegrass_seed_diff = plantlife_seed_diff + 10
+local poisonivy_seed_diff = plantlife_seed_diff + 10
+
+-- Local functions
+
+math.randomseed(os.time())
+
+local dbg = function(s)
+	if plantlife_debug then
+		print("[Plantlife] " .. s)
+	end
+end
+
+local is_node_loaded = function(node_pos)
+	n = minetest.env:get_node_or_nil(node_pos)
+	if (n == nil) or (n.name == "ignore") then
+		return false
+	end
+	return true
+end
+
+-- The spawning ABM
+
+spawn_on_surfaces = function(sdelay, splant, sradius, schance, ssurface, savoid, seed_diff, lightmin, lightmax, nneighbors, ocount, facedir, depthmax)
+	if seed_diff == nil then seed_diff = 0 end
+	if lightmin == nil then lightmin = 0 end
+	if lightmax == nil then lightmax = LIGHT_MAX end
+	if nneighbors == nil then nneighbors = ssurface end
+	if ocount == nil then ocount = 0 end
+	if depthmax == nil then depthmax = 1 end
+	minetest.register_abm({
+		nodenames = { ssurface },
+		interval = sdelay,
+		chance = schance,
+		neighbors = nneighbors,
+		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.env:get_node(p_top)
+			local perlin = minetest.env:get_perlin(seed_diff, perlin_octaves, perlin_persistence, perlin_scale )
+			local noise = perlin:get2d({x=p_top.x, y=p_top.z})
+			if ( noise > plantlife_limit ) and (n_top.name == "air") and is_node_loaded(p_top) then
+				local n_light = minetest.env:get_node_light(p_top, nil)
+				if (minetest.env:find_node_near(p_top, sradius + math.random(-1.5,2), savoid) == nil )
+				   and (n_light >= lightmin)
+				   and (n_light <= lightmax)
+				and table.getn(minetest.env:find_nodes_in_area({x=pos.x-1, y=pos.y, z=pos.z-1}, {x=pos.x+1, y=pos.y, z=pos.z+1}, nneighbors)) > ocount 
+				then
+					local walldir = plant_valid_wall(p_top)
+					if splant == "poisonivy:seedling" and walldir ~= nil then
+						dbg("Spawn: poisonivy:climbing at "..dump(p_top).." on "..ssurface)
+						minetest.env:add_node(p_top, { name = "poisonivy:climbing", param2 = walldir })
+					else
+						local deepnode = minetest.env:get_node({ x = pos.x, y = pos.y-depthmax-1, z = pos.z }).name
+						if (ssurface ~= "default:water_source")
+							or (ssurface == "default:water_source"
+							and deepnode ~= "default:water_source") then
+							dbg("Spawn: "..splant.." at "..dump(p_top).." on "..ssurface)
+							minetest.env:add_node(p_top, { name = splant, param2 = facedir })
+						end
+					end
+				end
+			end
+		end
+	})
+end
+
+-- The growing ABM
+
+grow_plants = function(gdelay, gchance, gplant, gresult, dry_early_node, grow_nodes, facedir)
+	minetest.register_abm({
+		nodenames = { gplant },
+		interval = gdelay,
+		chance = gchance,
+		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}
+			local n_top = minetest.env:get_node(p_top)
+			local n_bot = minetest.env:get_node(p_bot)
+
+			if string.find(dump(grow_nodes), n_bot.name) ~= nil and n_top.name == "air" then
+
+				-- corner case for wall-climbing poison ivy
+				if gplant == "poisonivy:climbing" then
+					local walldir=plant_valid_wall(p_top)
+					if walldir ~= nil then
+						dbg("Grow: "..gplant.." upwards to ("..dump(p_top)..")")
+						minetest.env:add_node(p_top, { name = gplant, param2 = walldir })
+					end
+
+				-- corner case for changing short junglegrass to dry shrub in desert
+				elseif n_bot.name == dry_early_node and gplant == "junglegrass:short" then
+					dbg("Die: "..gplant.." becomes default:dry_shrub at ("..dump(pos)..")")
+					minetest.env:add_node(pos, { name = "default:dry_shrub" })
+
+				elseif gresult == nil then
+					dbg("Die: "..gplant.." at ("..dump(pos)..")")
+					minetest.env:remove_node(pos)
+
+				elseif gresult ~= nil then
+					dbg("Grow: "..gplant.." becomes "..gresult.." at ("..dump(pos)..")")
+					if facedir == nil then
+						minetest.env:add_node(pos, { name = gresult })
+					else
+						minetest.env:add_node(pos, { name = gresult, param2 = facedir })
+					end
+				end
+			end
+		end
+	})
+end
+
+-- function to decide if a node has a wall that's in verticals_list{}
+-- returns wall direction of valid node, or nil if invalid.
+
+plant_valid_wall = function(wallpos)
+	local walldir = nil
+	local verts = dump(verticals_list)
+
+	local testpos = { x = wallpos.x-1, y = wallpos.y, z = wallpos.z   }
+	if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=3 end
+
+	local testpos = { x = wallpos.x+1, y = wallpos.y, z = wallpos.z   }
+	if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=2 end
+
+	local testpos = { x = wallpos.x  , y = wallpos.y, z = wallpos.z-1 }
+	if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=5 end
+
+	local testpos = { x = wallpos.x  , y = wallpos.y, z = wallpos.z+1 }
+	if string.find(verts, minetest.env:get_node(testpos).name) ~= nil then walldir=4 end
+
+	return walldir
+end
+
+local enstr = ""
+
+if enabled_flowers then enstr = enstr.." flowers" end
+if enabled_junglegrass then enstr = enstr.." junglegrass" end
+if enabled_poisonivy then enstr = enstr.." poisonivy" end
+
+if enstr == "" then enstr = "...er...nothing!" end
+
+print("[Plantlife] Loaded (enabled"..enstr..")")

poinsonivy/depends.txt

@@ -1 +1 @@
-plants
+plants_lib