local old_nodes = {}
local old_entities = {}

-- Old/Missing nodes that should be replaced with something currently in game
local replace_nodes = {}


-- "Replaces" an old/non-existent node
local function replace_node(old_node, new_node)
    minetest.register_alias(old_node, new_node)
end


for _,node_name in ipairs(old_nodes) do
    minetest.register_node(':'..node_name, {
        groups = {old=1},
    })
end

minetest.register_abm({
    nodenames = {'group:old'},
    interval = 1,
    chance = 1,
    action = function(pos, node)
        minetest.remove_node(pos)
    end,
})

for _,entity_name in ipairs(old_entities) do
    minetest.register_entity(':'..entity_name, {
        on_activate = function(self, staticdata)
            self.object:remove()
        end,
    })
end

-- Replace old nodes
for _, node_group in pairs(replace_nodes) do
    replace_node(node_group[1], node_group[2])
end