pipes.lua: place old ABM code registration behind if-guard for new flag

init.lua

@@ -111,6 +111,9 @@ dofile(pipeworks.modpath.."/filter-injector.lua")
 dofile(pipeworks.modpath.."/trashcan.lua")
 dofile(pipeworks.modpath.."/wielder.lua")
 
+-- temporary flag to enable new flowing behaviour
+pipeworks.enable_new_flow_logic = true
+
 if pipeworks.enable_pipes then dofile(pipeworks.modpath.."/pipes.lua") end
 if pipeworks.enable_teleport_tube then dofile(pipeworks.modpath.."/teleport_tube.lua") end
 if pipeworks.enable_pipe_devices then dofile(pipeworks.modpath.."/devices.lua") end

pipes.lua

@@ -191,6 +191,13 @@ table.insert(pipes_full_nodenames,"pipeworks:valve_on_loaded")
 table.insert(pipes_full_nodenames,"pipeworks:entry_panel_loaded")
 table.insert(pipes_full_nodenames,"pipeworks:flow_sensor_loaded")
 
+
+
+
+if not pipeworks.enable_new_flow_logic then
+-- sorry, no indents... it messes with the patchlogs too much
+
+
 minetest.register_abm({
 	nodenames = pipes_empty_nodenames,
 	interval = 1,
@@ -228,6 +235,9 @@ minetest.register_abm({
 })
 
 
+else
+
+
 -- run pressure balancing ABM over all water-moving nodes
 local pipes_all_nodenames = pipes_full_nodenames
 for _, pipe in ipairs(pipes_empty_nodenames) do
@@ -241,3 +251,7 @@ minetest.register_abm({
 		pipeworks.balance_pressure(pos, node)
 	end
 })
+
+
+
+end