all immortal

init.lua

-- Make all blocks undiggable

for name, reg in pairs(minetest.registered_nodes) do
	print("making " .. name .. " immortal 2")
	reg.groups = reg.groups or {}
	reg.groups.crumbly = nil
	reg.groups.cracky  = nil
	reg.groups.snappy  = nil
	reg.groups.choppy  = nil
	reg.groups.fleshy  = nil
	reg.groups.explody = nil
	reg.groups.dig_immediate = nil
	reg.groups.oddly_breakable_by_hand = nil
	reg.groups.immortal = 1
	minetest.register_node(":" .. name, reg)
end