Put all the extra lua files in a src directory.

(This cleans up the folder for users, who don't want to see all those
strange files)

src/util.lua

@@ -0,0 +1,155 @@
+--Global config and function table.
+snow = {
+	legacy = true,
+	sleds = true,
+	enable_snowfall = true,
+	lighter_snowfall = false,
+	debug = false,
+	smooth_biomes = true,
+	christmas_content = true,
+	smooth_snow = true,
+	min_height = 3,
+}
+
+--Config documentation.
+local doc = {
+	legacy = "Whether you are running a legacy minetest version (auto-detected).",
+	sleds = "Disable this to prevent sleds from being riden.",
+	enable_snowfall = "Enables falling snow.",
+	lighter_snowfall = "Reduces the amount of resources and fps used by snowfall.",
+	debug = "Enables debug output.",
+	smooth_biomes = "Enables smooth transition of biomes",
+	christmas_content = "Disable this to remove christmas saplings from being found.",
+	smooth_snow = "Disable this to stop snow from being smoothed.",
+	min_height = "The minumum height a snow biome will generate.",
+}
+
+--Manage config.
+--Saves contents of config to file.
+local function saveConfig(path, config, doc)
+	local file = io.open(path,"w")
+	if file then
+		for i,v in pairs(config) do
+			local t = type(v)
+			if t == "string" or t == "number" or t == "boolean" then
+				if doc and doc[i] then
+					file:write("# "..doc[i].."\n")
+				end
+				file:write(i.." = "..tostring(v).."\n")
+			end
+		end
+	end
+end
+--Loads config and returns config values inside table.
+local function loadConfig(path)
+	local config = {}
+	local file = io.open(path,"r")
+  	if file then
+  		io.close(file)
+		for line in io.lines(path) do
+			if line:sub(1,1) ~= "#" then
+				i, v = line:match("^(%S*) = (%S*)")
+				if i and v then
+					if v == "true" then v = true end
+					if v == "false" then v = false end
+					if tonumber(v) then v = tonumber(v) end
+					config[i] = v
+				end
+			end
+		end
+		return config
+	else
+		--Create config file.
+		return nil
+	end
+end
+
+minetest.register_on_shutdown(function() saveConfig(minetest.get_modpath("snow").."/config.txt", snow, doc) end)
+
+local config = loadConfig(minetest.get_modpath("snow").."/config.txt")
+if config then
+	for i,v in pairs(config) do
+		if type(snow[i]) == type(v) then
+			snow[i] = v
+		end
+	end
+else
+	saveConfig(minetest.get_modpath("snow").."/config.txt", snow, doc)
+end
+
+for i,v in pairs(snow) do
+	local t = type(v)
+	if t == "string" or t == "number" or t == "boolean" then
+		local v = minetest.setting_get("snow_"..i)
+		if v ~= nil then
+			if v == "true" then v = true end
+			if v == "false" then v = false end
+			if tonumber(v) then v = tonumber(v) end
+			snow[i] = v
+		end
+	end
+end
+
+--AUTO DETECT and/or OVERIDEN values--
+
+--legacy--
+--Detect if we are running the latest minetest.
+if minetest.register_on_mapgen_init then
+	snow.legacy = false
+else
+	snow.legacy = true
+end
+if config and snow.legacy ~= config.legacy then
+	saveConfig(minetest.get_modpath("snow").."/config.txt", snow, doc)
+end
+
+--MENU
+
+local get_formspec = function()
+	local p = -0.5
+	local formspec = "label[0,-0.3;Settings:]"
+	for i,v in pairs(snow) do
+		local t = type(v)
+		if t == "string" or t == "number" then
+			p = p + 1.5
+			formspec = formspec.."field[0.3,"..p..";2,1;snow:"..i..";"..i..";"..v.."]"
+		elseif t == "boolean" then
+			p = p + 0.5
+			formspec = formspec.."checkbox[0,"..p..";snow:"..i..";"..i..";"..tostring(v).."]"
+		end
+	end
+	p = p + 1
+	formspec = "size[4,"..p..";]\n"..formspec
+	return formspec
+end
+
+minetest.register_on_player_receive_fields(function(player, formname, fields)
+	if formname == "snow:menu" then
+		for i,v in pairs(snow) do
+			local t = type(v)
+			if t == "string" or t == "number" or t == "boolean" then
+				if fields["snow:"..i] then
+					if t == "string" then 
+						snow[i] = fields["snow:"..i] 
+					end
+					if t == "number" then 
+						snow[i] = tonumber(fields["snow:"..i]) 
+					end
+					if t == "boolean" then 
+						if fields["snow:"..i] == "true" then snow[i] = true end
+						if fields["snow:"..i] == "false" then snow[i] = false end
+					end
+				end	
+			end
+		end
+	end
+end)
+
+
+minetest.register_chatcommand("snow", {
+	description = "Show a menu for various actions",
+	privs = {server=true},
+	func = function(name, param)
+		minetest.show_formspec(name, "snow:menu", get_formspec())
+	end,
+})