Use diglib and lua_async

init.lua

@@ -1,13 +1,18 @@
-minetest.register_globalstep(function()
-	if minetest.settings:get_bool("digcustom") then
-		local list = (minetest.settings:get("digcustom_nodes") or ""):split(",")
-		local positions = minetest.find_nodes_near(minetest.localplayer:get_pos(), 5, list, true)
-		for i, pos in ipairs(positions) do
-			if i > 5 then break end
-			minetest.dig_node(pos)
+async(function()
+	while true do
+		if minetest.settings:get_bool("digcustom") and minetest.localplayer then
+			local list = (minetest.settings:get("digcustom_nodes") or ""):split(",")
+			local node_pos = minetest.find_node_near(minetest.localplayer:get_pos(), 5, list, true)
+			local max_time = tonumber(minetest.settings:get("digcustom_max_time")) or -1
+
+			if node_pos then
+				await(diglib.dig_node(node_pos, max_time))
+			end
 		end
+
+		lua_async.yield()
 	end
-end)
+end)()
 
 minetest.register_list_command("digcustom", "Configue custom autodig nodes", "digcustom_nodes")
 

mod.conf

@@ -1,3 +1,4 @@
 name = digcustom
 author = Fleckenstein
 description = A dragonfire CSM to automatically dig customizable nodes
+depends = diglib, lua_async

settingtypes.txt

@@ -1,2 +1,9 @@
+# Enable DigCustom
 digcustom (DigCustom) bool false
+
+# Nodes to dig, comma separated
 digcustom_nodes (DigCustom Nodes) string
+
+# Maximum time to spend on digging a node.
+# -1 means no limit
+digcustom_max_time (DigCustom Max Time) int -1