Move Factorio data from /data/factorio to /worlds/factorio/data, to contain it in its world folder

worlds/factorio/data/mod/lib.lua

@@ -0,0 +1,35 @@
+function filter_ingredients(ingredients, ingredient_filter)
+    local new_ingredient_list = {}
+    for _, ingredient_table in pairs(ingredients) do
+        if ingredient_filter[ingredient_table[1]] then -- name of ingredient_table
+            table.insert(new_ingredient_list, ingredient_table)
+        end
+    end
+
+    return new_ingredient_list
+end
+
+function get_any_stack_size(name)
+    local item = game.item_prototypes[name]
+    if item ~= nil then
+        return item.stack_size
+    end
+    item = game.equipment_prototypes[name]
+    if item ~= nil then
+        return item.stack_size
+    end
+    -- failsafe
+    return 1
+end
+
+-- from https://stackoverflow.com/a/40180465
+-- split("a,b,c", ",") => {"a", "b", "c"}
+function split(s, sep)
+    local fields = {}
+
+    sep = sep or " "
+    local pattern = string.format("([^%s]+)", sep)
+    string.gsub(s, pattern, function(c) fields[#fields + 1] = c end)
+
+    return fields
+end