making formspecs more systematic and upgradable

7 files changed, 143 insertions, 174 deletions

diff --git a/init.lua b/init.lua
index d4d7832..7beb8ee 100644
--- a/init.lua
+++ b/init.lua
@@ -20,21 +20,25 @@ digtron.builder_read_item_substitutions = {
 	["farming:desert_sand_soil_wet"] = "default:desert_sand",
 }
 
-dofile( minetest.get_modpath( "digtron" ) .. "/config.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/util.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/doc.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/awards.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/class_pointset.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/class_layout.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/entities.lua" )
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_misc.lua" ) -- contains structure and light nodes
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_storage.lua" ) -- contains inventory and fuel storage nodes
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_diggers.lua" ) -- contains all diggers
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_builders.lua" ) -- contains all builders (there's just one currently)
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_controllers.lua" ) -- controllers
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_axle.lua" ) -- Rotation controller
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/node_crate.lua" ) -- Digtron portability support
-dofile( minetest.get_modpath( "digtron" ) .. "/nodes/recipes.lua" )
+local digtron_modpath = minetest.get_modpath( "digtron" )
+
+dofile( digtron_modpath .. "/config.lua" )
+dofile( digtron_modpath .. "/util.lua" )
+dofile( digtron_modpath .. "/doc.lua" )
+dofile( digtron_modpath .. "/awards.lua" )
+dofile( digtron_modpath .. "/class_pointset.lua" )
+dofile( digtron_modpath .. "/class_layout.lua" )
+dofile( digtron_modpath .. "/entities.lua" )
+dofile( digtron_modpath .. "/nodes/node_misc.lua" ) -- contains structure and light nodes
+dofile( digtron_modpath .. "/nodes/node_storage.lua" ) -- contains inventory and fuel storage nodes
+dofile( digtron_modpath .. "/nodes/node_diggers.lua" ) -- contains all diggers
+dofile( digtron_modpath .. "/nodes/node_builders.lua" ) -- contains all builders (there's just one currently)
+dofile( digtron_modpath .. "/nodes/node_controllers.lua" ) -- controllers
+dofile( digtron_modpath .. "/nodes/node_axle.lua" ) -- Rotation controller
+dofile( digtron_modpath .. "/nodes/node_crate.lua" ) -- Digtron portability support
+dofile( digtron_modpath .. "/nodes/recipes.lua" )
+
+dofile( digtron_modpath .. "/upgrades.lua" ) -- various LBMs for upgrading older versions of Digtron.
 
 -- digtron group numbers:
 -- 1 - generic digtron node, nothing special is done with these. They're just dragged along.
@@ -44,113 +48,8 @@ dofile( minetest.get_modpath( "digtron" ) .. "/nodes/recipes.lua" )
 -- 5 - fuel-holding digtron, has a "fuel" invetory that the control node can draw fuel items from. Separate from general inventory, nothing gets put here automatically.
 -- 6 - holds both fuel and main inventories
 
-minetest.register_lbm({
-	name = "digtron:sand_digger_upgrade",
-	nodenames = {"digtron:sand_digger"},
-	action = function(pos, node)
-		local meta = minetest.get_meta(pos)
-		local offset = meta:get_string("offset")
-		local period = meta:get_string("period")
-		minetest.set_node(pos, {name = "digtron:soft_digger",
-			param2 = node.param2})
-		meta:set_string("offset", offset)
-		meta:set_string("period", period)
-	end
-})
-
-minetest.register_lbm({
-	name = "digtron:fuelstore_upgrade",
-	nodenames = {"digtron:fuelstore"},
-	action = function(pos, node)
-		local meta = minetest.get_meta(pos)
-		local inv = meta:get_inventory()
-		local list = inv:get_list("main")
-		inv:set_list("main", {})
-		inv:set_list("fuel", list)		
-		meta:set_string("formspec",
-			"size[8,9.3]" ..
-			default.gui_bg ..
-			default.gui_bg_img ..
-			default.gui_slots ..
-			"label[0,0;Fuel items]" ..
-			"list[current_name;fuel;0,0.6;8,4;]" ..
-			"list[current_player;main;0,5.15;8,1;]" ..
-			"list[current_player;main;0,6.38;8,3;8]" ..
-			"listring[current_name;fuel]" ..
-			"listring[current_player;main]" ..
-			default.get_hotbar_bg(0,5.15)
-		)		
-	end
-})
-
-minetest.register_lbm({
-	name = "digtron:autocontroller_lateral_upgrade",
-	nodenames = {"digtron:auto_controller"},
-	action = function(pos, node)
-		local meta = minetest.get_meta(pos)
-		local cycles = meta:get_int("offset")
-		meta:set_int("cycles", cycles)
-		meta:set_int("offset", 0)
-		meta:set_int("slope", 0)
-		meta:set_string("formspec",
-			"size[3.5,2]" ..
-			default.gui_bg ..
-			default.gui_bg_img ..
-			default.gui_slots ..
-			"field[0.5,0.8;1,0.1;cycles;Cycles;${cycles}]" ..
-			"tooltip[cycles;When triggered, this controller will try to run for the given number of cycles.\nThe cycle count will decrement as it runs, so if it gets halted by a problem\nyou can fix the problem and restart.]" ..
-			"button_exit[1.2,0.5;1,0.1;set;Set]" ..
-			"tooltip[set;Saves the cycle setting without starting the controller running]" ..
-			"button_exit[2.2,0.5;1,0.1;execute;Set &\nExecute]" ..
-			"tooltip[execute;Begins executing the given number of cycles]" ..
-			"field[0.5,2.0;1,0.1;slope;Slope;${slope}]" ..
-			"tooltip[slope;For diagonal digging. After every X nodes the auto controller moves forward,\nthe controller will add an additional cycle moving the digtron laterally in the\ndirection of the arrows on the side of this controller.\nSet to 0 for no lateral digging.]" ..
-			"field[1.5,2.0;1,0.1;offset;Offset;${offset}]" ..
-			"tooltip[offset;Sets the offset of the lateral motion defined in the Slope field.\nNote: this offset is relative to the controller's location.\nThe controller will move down when it reaches the indicated point.]" ..
-			"field[2.5,2.0;1,0.1;period;Delay;${period}]" ..
-			"tooltip[period;Number of seconds to wait between each cycle]"
-		)		
-	end
-})
-
--- internationalization boilerplate
-local MP = minetest.get_modpath(minetest.get_current_modname())
-local S, NS = dofile(MP.."/intllib.lua")
-
-minetest.register_lbm({
-	name = "digtron:builder_extrusion_upgrade",
-	nodenames = {"digtron:builder"},
-	action = function(pos, node)
-		local meta = minetest.get_meta(pos)
-		meta:set_int("extrusion", 1)
-		meta:set_string("formspec",
-			"size[8,5.2]" ..
-			default.gui_bg ..
-			default.gui_bg_img ..
-			default.gui_slots ..
-			"list[current_name;main;0.5,0;1,1;]" ..
-			"label[0.5,0.8;" .. S("Block to build") .. "]" ..
-			"field[2.3,0.8;1,0.1;extrusion;" .. S("Extrusion") .. ";${extrusion}]" ..
-			"tooltip[extrusion;" .. S("Builder will extrude this many blocks in the direction it is facing.\nCan be set from 1 to @1.\nNote that Digtron won't build into unloaded map regions.", digtron.config.maximum_extrusion) .. "]" ..
-			"field[3.3,0.8;1,0.1;period;" .. S("Periodicity") .. ";${period}]" ..
-			"tooltip[period;" .. S("Builder will build once every n steps.\nThese steps are globally aligned, so all builders with the\nsame period and offset will build on the same location.") .. "]" ..
-			"field[4.3,0.8;1,0.1;offset;" .. S("Offset") .. ";${offset}]" ..
-			"tooltip[offset;" .. S("Offsets the start of periodicity counting by this amount.\nFor example, a builder with period 2 and offset 0 builds\nevery even-numbered block and one with period 2 and\noffset 1 builds every odd-numbered block.") .. "]" ..
-			"button_exit[5.0,0.5;1,0.1;set;" .. S("Save &\nShow") .. "]" ..
-			"tooltip[set;" .. S("Saves settings") .. "]" ..
-			"field[6.3,0.8;1,0.1;build_facing;" .. S("Facing") .. ";${build_facing}]" ..
-			"tooltip[build_facing;" .. S("Value from 0-23. Not all block types make use of this.\nUse the 'Read & Save' button to copy the facing of the block\ncurrently in the builder output location.") .. "]" ..
-			"button_exit[7.0,0.5;1,0.1;read;" .. S("Read &\nSave") .. "]" ..
-			"tooltip[read;" .. S("Reads the facing of the block currently in the build location,\nthen saves all settings.") .. "]" ..
-			"list[current_player;main;0,1.3;8,1;]" ..
-			default.get_hotbar_bg(0,1.3) ..
-			"list[current_player;main;0,2.5;8,3;8]" ..
-			"listring[current_player;main]" ..
-			"listring[current_name;main]"
-		)
-	end
-})
-
+-- This code was added for use with FaceDeer's fork of the [catacomb] mod. Paramat's version doesn't support customized protected nodes, which causes
+-- it to "eat" Digtrons sometimes.
 if minetest.get_modpath("catacomb") and catacomb ~= nil and catacomb.chamber_protected_nodes ~= nil and catacomb.passage_protected_nodes ~= nil then
 	local digtron_nodes = {
 		minetest.get_content_id("digtron:inventory"),
diff --git a/nodes/node_builders.lua b/nodes/node_builders.lua
index fa8bb0a..fac1d4b 100644
--- a/nodes/node_builders.lua
+++ b/nodes/node_builders.lua
@@ -45,6 +45,7 @@ minetest.register_node("digtron:builder", {
 	description = S("Digtron Builder Module"),
 	_doc_items_longdesc = digtron.doc.builder_longdesc,
     _doc_items_usagehelp = digtron.doc.builder_usagehelp,
+	_digtron_formspec = builder_formspec,
 	groups = {cracky = 3,  oddly_breakable_by_hand=3, digtron = 4},
 	drop = "digtron:builder",
 	sounds = digtron.metal_sounds,
diff --git a/nodes/node_controllers.lua b/nodes/node_controllers.lua
index 76bb40b..a7eda2e 100644
--- a/nodes/node_controllers.lua
+++ b/nodes/node_controllers.lua
@@ -172,6 +172,7 @@ minetest.register_node("digtron:auto_controller", {
 	description = S("Digtron Automatic Control Module"),
 	_doc_items_longdesc = digtron.doc.auto_controller_longdesc,
     _doc_items_usagehelp = digtron.doc.auto_controller_usagehelp,
+	_digtron_formspec = auto_formspec,
 	groups = {cracky = 3, oddly_breakable_by_hand = 3, digtron = 1},
 	drop = "digtron:auto_controller",
 	sounds = digtron.metal_sounds,
@@ -289,7 +290,6 @@ minetest.register_node("digtron:auto_controller", {
 	on_timer = function(pos, elapsed)
 		minetest.get_meta(pos):set_string("waiting", nil)
 	end,
-
 })
 
 ---------------------------------------------------------------------------------------------------------------
diff --git a/nodes/node_crate.lua b/nodes/node_crate.lua
index 017023d..7e30207 100644
--- a/nodes/node_crate.lua
+++ b/nodes/node_crate.lua
@@ -80,6 +80,7 @@ minetest.register_node("digtron:loaded_crate", {
 	description = S("Digtron Crate (Loaded)"),
 	_doc_items_longdesc = digtron.doc.loaded_crate_longdesc,
     _doc_items_usagehelp = digtron.doc.loaded_crate_usagehelp,
+	_digtron_formspec = loaded_formspec,
 	groups = {cracky = 3, oddly_breakable_by_hand=3, not_in_creative_inventory=1, digtron_protected=1},
 	stack_max = 1,
 	sounds = default.node_sound_wood_defaults(),
diff --git a/nodes/node_diggers.lua b/nodes/node_diggers.lua
index c12b46c..78d5200 100644
--- a/nodes/node_diggers.lua
+++ b/nodes/node_diggers.lua
@@ -36,17 +36,17 @@ local intermittent_formspec =
 	"button_exit[2.2,0.5;1,0.1;set;" .. S("Save") .. "]" ..
 	"tooltip[set;" .. S("Saves settings") .. "]"
 
-local intermittent_on_construct = function(pos)
-	local formspec = intermittent_formspec
-	if minetest.get_modpath("doc") then
-		formspec = "size[4.5,1]" .. formspec ..
+if minetest.get_modpath("doc") then
+	intermittent_formspec = "size[4.5,1]" .. intermittent_formspec ..
 		"button_exit[3.2,0.5;1,0.1;help;" .. S("Help") .. "]" ..
 		"tooltip[help;" .. S("Show documentation about this block") .. "]"
 	else
-		formspec = "size[3.5,1]" .. formspec
+		intermittent_formspec = "size[3.5,1]" .. intermittent_formspec
 	end
+
+local intermittent_on_construct = function(pos)
     local meta = minetest.get_meta(pos)
-    meta:set_string("formspec", formspec)
+    meta:set_string("formspec", intermittent_formspec)
 	meta:set_int("period", 1) 
 	meta:set_int("offset", 0) 
 end
@@ -72,6 +72,7 @@ minetest.register_node("digtron:digger", {
 	description = S("Digtron Digger Head"),
 	_doc_items_longdesc = digtron.doc.digger_longdesc,
     _doc_items_usagehelp = digtron.doc.digger_usagehelp,
+	_digtron_formspec = intermittent_formspec,
 	groups = {cracky = 3,  oddly_breakable_by_hand=3, digtron = 3},
 	drop = "digtron:digger",
 	sounds = digtron.metal_sounds,
@@ -125,6 +126,7 @@ minetest.register_node("digtron:intermittent_digger", {
 	description = S("Digtron Intermittent Digger Head"),
 	_doc_items_longdesc = digtron.doc.intermittent_digger_longdesc,
     _doc_items_usagehelp = digtron.doc.intermittent_digger_usagehelp,
+	_digtron_formspec = intermittent_formspec,
 	groups = {cracky = 3,  oddly_breakable_by_hand=3, digtron = 3},
 	drop = "digtron:intermittent_digger",
 	sounds = digtron.metal_sounds,
@@ -250,6 +252,7 @@ minetest.register_node("digtron:intermittent_soft_digger", {
 	description = S("Digtron Intermittent Soft Material Digger Head"),
 	_doc_items_longdesc = digtron.doc.intermittent_soft_digger_longdesc,
     _doc_items_usagehelp = digtron.doc.intermittent_soft_digger_usagehelp,
+	_digtron_formspec = intermittent_formspec,
 	groups = {cracky = 3,  oddly_breakable_by_hand=3, digtron = 3},
 	drop = "digtron:intermittent_soft_digger",
 	sounds = digtron.metal_sounds,
@@ -283,7 +286,7 @@ minetest.register_node("digtron:intermittent_soft_digger", {
 	on_construct = intermittent_on_construct,
 	
 	on_receive_fields = intermittent_on_receive_fields,
-
+	
 	execute_dig = function(pos, protected_nodes, nodes_dug, controlling_coordinate, lateral_dig)
 		if lateral_dig == true then
 			return 0, {}
diff --git a/nodes/node_storage.lua b/nodes/node_storage.lua
index 826aa20..56d19aa 100644
--- a/nodes/node_storage.lua
+++ b/nodes/node_storage.lua
@@ -2,12 +2,27 @@
 local MP = minetest.get_modpath(minetest.get_current_modname())
 local S, NS = dofile(MP.."/intllib.lua")
 
+
+local inventory_formspec = 
+	"size[8,9.3]" ..
+	default.gui_bg ..
+	default.gui_bg_img ..
+	default.gui_slots ..
+	"label[0,0;" .. S("Inventory items") .. "]" ..
+	"list[current_name;main;0,0.6;8,4;]" ..
+	"list[current_player;main;0,5.15;8,1;]" ..
+	"list[current_player;main;0,6.38;8,3;8]" ..
+	"listring[current_name;main]" ..
+	"listring[current_player;main]" ..
+	default.get_hotbar_bg(0,5.15)
+
 -- Storage buffer. Builder nodes draw from this inventory and digger nodes deposit into it.
 -- Note that inventories are digtron group 2.
 minetest.register_node("digtron:inventory", {
 	description = S("Digtron Inventory Storage"),
 	_doc_items_longdesc = digtron.doc.inventory_longdesc,
     _doc_items_usagehelp = digtron.doc.inventory_usagehelp,
+	_digtron_formspec = inventory_formspec,
 	groups = {cracky = 3, oddly_breakable_by_hand=3, digtron = 2, tubedevice = 1, tubedevice_receiver = 1},
 	drop = "digtron:inventory",
 	sounds = digtron.metal_sounds,
@@ -26,19 +41,7 @@ minetest.register_node("digtron:inventory", {
 
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
-		meta:set_string("formspec", 
-			"size[8,9.3]" ..
-			default.gui_bg ..
-			default.gui_bg_img ..
-			default.gui_slots ..
-			"label[0,0;" .. S("Inventory items") .. "]" ..
-			"list[current_name;main;0,0.6;8,4;]" ..
-			"list[current_player;main;0,5.15;8,1;]" ..
-			"list[current_player;main;0,6.38;8,3;8]" ..
-			"listring[current_name;main]" ..
-			"listring[current_player;main]" ..
-			default.get_hotbar_bg(0,5.15)
-		)
+		meta:set_string("formspec", inventory_formspec)
 		local inv = meta:get_inventory()
 		inv:set_size("main", 8*4)
 	end,
@@ -48,7 +51,7 @@ minetest.register_node("digtron:inventory", {
 		local inv = meta:get_inventory()
 		return inv:is_empty("main")
 	end,
-	
+		
 	-- Pipeworks compatibility
 	----------------------------------------------------------------
 
@@ -71,12 +74,26 @@ minetest.register_node("digtron:inventory", {
 	after_dig_node = (function() if minetest.get_modpath("pipeworks") then return pipeworks.after_dig end end)()
 })
 
+local fuelstore_formspec = 
+	"size[8,9.3]" ..
+	default.gui_bg ..
+	default.gui_bg_img ..
+	default.gui_slots ..
+	"label[0,0;" .. S("Fuel items") .. "]" ..
+	"list[current_name;fuel;0,0.6;8,4;]" ..
+	"list[current_player;main;0,5.15;8,1;]" ..
+	"list[current_player;main;0,6.38;8,3;8]" ..
+	"listring[current_name;fuel]" ..
+	"listring[current_player;main]" ..
+	default.get_hotbar_bg(0,5.15)
+
 -- Fuel storage. Controller node draws fuel from here.
 -- Note that fuel stores are digtron group 5.
 minetest.register_node("digtron:fuelstore", {
 	description = S("Digtron Fuel Storage"),
 	_doc_items_longdesc = digtron.doc.fuelstore_longdesc,
     _doc_items_usagehelp = digtron.doc.fuelstore_usagehelp,
+	_digtron_formspec = fuelstore_formspec,
 	groups = {cracky = 3,  oddly_breakable_by_hand=3, digtron = 5, tubedevice = 1, tubedevice_receiver = 1},
 	drop = "digtron:fuelstore",
 	sounds = digtron.metal_sounds,
@@ -95,19 +112,7 @@ minetest.register_node("digtron:fuelstore", {
 
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
-		meta:set_string("formspec", 
-			"size[8,9.3]" ..
-			default.gui_bg ..
-			default.gui_bg_img ..
-			default.gui_slots ..
-			"label[0,0;" .. S("Fuel items") .. "]" ..
-			"list[current_name;fuel;0,0.6;8,4;]" ..
-			"list[current_player;main;0,5.15;8,1;]" ..
-			"list[current_player;main;0,6.38;8,3;8]" ..
-			"listring[current_name;fuel]" ..
-			"listring[current_player;main]" ..
-			default.get_hotbar_bg(0,5.15)
-		)
+		meta:set_string("formspec", fuelstore_formspec)
 		local inv = meta:get_inventory()
 		inv:set_size("fuel", 8*4)
 	end,
@@ -129,7 +134,7 @@ minetest.register_node("digtron:fuelstore", {
 		local inv = meta:get_inventory()
 		return inv:is_empty("fuel")
 	end,
-	
+		
 	-- Pipeworks compatibility
 	----------------------------------------------------------------
 
@@ -158,11 +163,28 @@ minetest.register_node("digtron:fuelstore", {
 	after_dig_node = (function() if minetest.get_modpath("pipeworks")then return pipeworks.after_dig end end)()
 })
 
+local combined_storage_formspec =
+	"size[8,9.9]" ..
+	default.gui_bg ..
+	default.gui_bg_img ..
+	default.gui_slots ..
+	"label[0,0;" .. S("Inventory items") .. "]" ..
+	"list[current_name;main;0,0.6;8,3;]" ..
+	"label[0,3.5;" .. S("Fuel items") .. "]" ..
+	"list[current_name;fuel;0,4.1;8,1;]" ..
+	"list[current_player;main;0,5.75;8,1;]" ..
+	"list[current_player;main;0,6.98;8,3;8]" ..
+	"listring[current_name;main]" ..
+	"listring[current_player;main]" ..
+	default.get_hotbar_bg(0,5.75)
+
+
 -- Combined storage. Group 6 has both an inventory and a fuel store
 minetest.register_node("digtron:combined_storage", {
 	description = S("Digtron Combined Storage"),
 	_doc_items_longdesc = digtron.doc.combined_storage_longdesc,
     _doc_items_usagehelp = digtron.doc.combined_storage_usagehelp,
+	_digtron_formspec = combined_storage_formspec,
 	groups = {cracky = 3,  oddly_breakable_by_hand=3, digtron = 6, tubedevice = 1, tubedevice_receiver = 1},
 	drop = "digtron:combined_storage",
 	sounds = digtron.metal_sounds,
@@ -179,21 +201,7 @@ minetest.register_node("digtron:combined_storage", {
 		},
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
-		meta:set_string("formspec", 
-			"size[8,9.9]" ..
-			default.gui_bg ..
-			default.gui_bg_img ..
-			default.gui_slots ..
-			"label[0,0;" .. S("Inventory items") .. "]" ..
-			"list[current_name;main;0,0.6;8,3;]" ..
-			"label[0,3.5;" .. S("Fuel items") .. "]" ..
-			"list[current_name;fuel;0,4.1;8,1;]" ..
-			"list[current_player;main;0,5.75;8,1;]" ..
-			"list[current_player;main;0,6.98;8,3;8]" ..
-			"listring[current_name;main]" ..
-			"listring[current_player;main]" ..
-			default.get_hotbar_bg(0,5.75)
-		)
+		meta:set_string("formspec", combined_storage_formspec)
 		local inv = meta:get_inventory()
 		inv:set_size("main", 8*3)
 		inv:set_size("fuel", 8*1)
@@ -230,7 +238,7 @@ minetest.register_node("digtron:combined_storage", {
 		local inv = meta:get_inventory()
 		return inv:is_empty("fuel") and inv:is_empty("main")
 	end,
-	
+		
 	-- Pipeworks compatibility
 	----------------------------------------------------------------
 	tube = (function() if minetest.get_modpath("pipeworks") then return {
diff --git a/upgrades.lua b/upgrades.lua
new file mode 100644
index 0000000..8f0c6fb
--- /dev/null
+++ b/upgrades.lua
@@ -0,0 +1,57 @@
+-- re-applies the "_digtron_formspec" property from all digtron node defs to the digtron node's metadata.
+minetest.register_lbm({
+	name = "digtron:generic_formspec_sanitizer",
+	nodenames = {"group:digtron"},
+	action = function(pos, node)
+		local node_def = minetest.registered_nodes[node.name]
+		local meta = minetest.get_meta(pos)
+		meta:set_string("formspec", node_def._digtron_formspec)
+	end
+})
+
+minetest.register_lbm({
+	name = "digtron:sand_digger_upgrade",
+	nodenames = {"digtron:sand_digger"},
+	action = function(pos, node)
+		local meta = minetest.get_meta(pos)
+		local offset = meta:get_string("offset")
+		local period = meta:get_string("period")
+		minetest.set_node(pos, {name = "digtron:soft_digger",
+			param2 = node.param2})
+		meta:set_string("offset", offset)
+		meta:set_string("period", period)
+	end
+})
+
+minetest.register_lbm({
+	name = "digtron:fuelstore_upgrade",
+	nodenames = {"digtron:fuelstore"},
+	action = function(pos, node)
+		local meta = minetest.get_meta(pos)
+		local inv = meta:get_inventory()
+		local list = inv:get_list("main")
+		inv:set_list("main", {})
+		inv:set_list("fuel", list)		
+	end
+})
+
+minetest.register_lbm({
+	name = "digtron:autocontroller_lateral_upgrade",
+	nodenames = {"digtron:auto_controller"},
+	action = function(pos, node)
+		local meta = minetest.get_meta(pos)
+		local cycles = meta:get_int("offset")
+		meta:set_int("cycles", cycles)
+		meta:set_int("offset", 0)
+		meta:set_int("slope", 0)
+	end
+})
+
+minetest.register_lbm({
+	name = "digtron:builder_extrusion_upgrade",
+	nodenames = {"digtron:builder"},
+	action = function(pos, node)
+		local meta = minetest.get_meta(pos)
+		meta:set_int("extrusion", 1)
+	end
+})
\ No newline at end of file