musttest_game/mods/mapgen/init.lua

-- Start fresh.
-- Any mods wishing to register additional ores must run after this one.
minetest.clear_registered_ores()
minetest.clear_registered_biomes()
minetest.clear_registered_decorations()



mapgen = mapgen or {}
mapgen.modpath = minetest.get_modpath("mapgen")
mapgen.report_time = mapgen.report_time or 0
mapgen.report_chunks = mapgen.report_chunks or 0



local reload_or_dofile = function(name, path)
    if minetest.get_modpath("reload") then
        reload.register_file(name, path)
    else
        dofile(path)
    end
end



if not mapgen.files_registered then
    local mp = mapgen.modpath

		-- Inform players.
		minetest.register_on_generated(function(minp, maxp, seed)
			local time = os.time() -- Time since epoc in seconds.
			if (time - mapgen.report_time) > 60 and mapgen.report_chunks > 0 then
				minetest.chat_send_all("# Server: Mapgen working, expect lag. (Chunks: " .. mapgen.report_chunks .. ".)")
				mapgen.report_time = time
				mapgen.report_chunks = 0
			end
			mapgen.report_chunks = mapgen.report_chunks + 1
		end)

    -- These files are reloadable. Their functions can be changed at runtime.
    reload_or_dofile("mapgen:shrubs",	    mp .. "/shrubs.lua")
    reload_or_dofile("mapgen:papyrus",		mp .. "/papyrus.lua")
    reload_or_dofile("mapgen:grass",		mp .. "/grass.lua")

    if minetest.get_modpath("flowers") then
        reload_or_dofile("mapgen:flowers",		mp .. "/flowers.lua")
        reload_or_dofile("mapgen:mushrooms",	mp .. "/mushrooms.lua")
    end

    -- Ore and biome registration.
    dofile(mp .. "/mg_alias.lua")
    dofile(mp .. "/mapgen.lua")
    dofile(mp .. "/biome.lua")

    minetest.register_on_generated(function(minp, maxp, seed)
        mapgen.generate_dry_shrubs	(minp, maxp, seed)
        mapgen.generate_papyrus	(minp, maxp, seed)
        mapgen.generate_grass		(minp, maxp, seed)
    end)

    if minetest.get_modpath("flowers") then
        minetest.register_on_generated(function(minp, maxp, seed)
            mapgen.generate_flowers	(minp, maxp, seed)
            mapgen.generate_mushrooms	(minp, maxp, seed)
        end)
    end

    mapgen.files_registered = true
end