Unlock basic Nauvis technologies when adding the mod to an existing game

lignumis/scripts/init-existing.lua

@@ -13,6 +13,15 @@ InitExisting.on_init = function()
             storage.nauvis_visited = true
         end
     end
+
+    for _, force in pairs(game.forces) do
+        force.technologies["iron-processing"].researched = true
+        force.technologies["copper-processing"].researched = true
+        if force.is_space_location_unlocked("nauvis") then
+            force.technologies["planet-discovery-nauvis"].researched = true
+        end
+    end
+
     game.print { "", { "lignumis.start-new-game" } }
 end