if there's no digiline distributor, fall back to vertical digilines from "digistuff" mod

(if neither mod exists, there will no option to set the distribution node)

depends.txt

@@ -9,3 +9,4 @@ streetspoles?
 streets_trafficlight?
 trafficlight?
 digilines?
+digistuff?

init.lua

@@ -4,8 +4,9 @@ local modpath = minetest.get_modpath("simple_streetlights")
 
 streetlights = {}
 streetlights.basic_materials = minetest.get_modpath("basic_materials")
-streetlights.concrete = "basic_materials:concrete_block"
-streetlights.distributor = "streets:digiline_distributor"
+streetlights.concrete =      "basic_materials:concrete_block"
+streetlights.distributor =   "streets:digiline_distributor"
+streetlights.vert_digiline = "digistuff:vertical_bottom"
 
 dofile(modpath.."/simple.lua")
 if minetest.get_modpath("homedecor_lighting") and minetest.get_modpath("streetspoles") then

simple.lua

@@ -65,7 +65,7 @@ minetest.register_privilege("streetlight", {
 	give_to_singleplayer = true
 })
 
-local function check_and_place(itemstack, placer, pointed_thing, pole, light, param2, needs_digiline_wire, needs_distributor)
+local function check_and_place(itemstack, placer, pointed_thing, pole, light, param2, needs_digiline_wire, distributor_node)
 	local controls = placer:get_player_control()
 	if not placer then return end
 	local playername = placer:get_player_name()
@@ -117,7 +117,7 @@ local function check_and_place(itemstack, placer, pointed_thing, pole, light, pa
 	if minetest.is_protected(pos4, player_name) or not (def3 and def4.buildable_to) then return end
 
 	if controls.sneak and minetest.is_protected(pos1, player_name) then return end
-	if needs_distributor and minetest.is_protected(pos0, player_name) then return end
+	if distributor_node and minetest.is_protected(pos0, player_name) then return end
 
 	if not creative.is_enabled_for(player_name) then
 		local inv = placer:get_inventory()
@@ -145,12 +145,12 @@ local function check_and_place(itemstack, placer, pointed_thing, pole, light, pa
 			end
 		end
 
-		if needs_distributor and needs_digiline_wire then
-			if not inv:contains_item("main", streetlights.distributor) then
-				minetest.chat_send_player(playername, "*** You don't have any Digiline distributors in your inventory!")
+		if distributor_node and needs_digiline_wire then
+			if not inv:contains_item("main", distributor_node) then
+				minetest.chat_send_player(playername, "*** You don't have any "..distributor_node.." in your inventory!")
 				return
 			else
-				inv:remove_item("main", streetlights.distributor)
+				inv:remove_item("main", distributor_node)
 			end
 		end
 
@@ -163,8 +163,8 @@ local function check_and_place(itemstack, placer, pointed_thing, pole, light, pa
 
 	end
 
-	if needs_distributor and needs_digiline_wire then
-		minetest.set_node(pos0, { name = streetlights.distributor })
+	if distributor_node and needs_digiline_wire then
+		minetest.set_node(pos0, { name = distributor_node })
 	end
 
 	if controls.sneak then
@@ -331,17 +331,28 @@ for _, pole in ipairs(poles_tab) do
 						}
 					})
 
+					local distributor = nil
+					local dist_overlay = nil
+
 					if minetest.registered_items[streetlights.distributor] then
+						distributor = streetlights.distributor
+						dist_overlay = "^simple_streetlights_inv_pole_distributor_overlay.png"
+					elseif minetest.registered_items[streetlights.vert_digiline] then
+						distributor = streetlights.vert_digiline
+						dist_overlay = "^simple_streetlights_inv_pole_vertical_digiline_overlay.png"
+					end
+
+					if distributor then
 						minetest.register_tool("simple_streetlights:spawner_"..matname.."_"..lightname.."_digilines_distributor", {
 							description = "Streetlight spawner ("..matname.." pole, with "..lightname..", digilines conducting pole, with distributor 2m below)",
 							inventory_image = "simple_streetlights_inv_pole_"..matname..".png"..
 											  "^simple_streetlights_inv_pole_digiline_overlay.png"..
-											  "^simple_streetlights_inv_pole_distributor_overlay.png"..
+											  dist_overlay..
 											  "^simple_streetlights_inv_light_source_"..lightname..".png",
 							use_texture_alpha = true,
 							tool_capabilities = { full_punch_interval=0.1 },
 							on_place = function(itemstack, placer, pointed_thing)
-								check_and_place(itemstack, placer, pointed_thing, matnode, lightnode, lightparam2, true, true)
+								check_and_place(itemstack, placer, pointed_thing, matnode, lightnode, lightparam2, true, distributor)
 							end,
 							on_use = ilights.digiline_on_use
 						})
@@ -358,7 +369,7 @@ for _, pole in ipairs(poles_tab) do
 								matnode,
 								lightnode,
 								digiline_wire_node,
-								streetlights.distributor
+								distributor
 							}
 						})
 
@@ -368,7 +379,7 @@ for _, pole in ipairs(poles_tab) do
 							recipe = {
 								"simple_streetlights:spawner_"..matname.."_"..lightname,
 								digiline_wire_node,
-								streetlights.distributor
+								distributor
 							}
 						})
 
@@ -377,7 +388,7 @@ for _, pole in ipairs(poles_tab) do
 							type = "shapeless",
 							recipe = {
 								"simple_streetlights:spawner_"..matname.."_"..lightname.."_digilines",
-								streetlights.distributor
+								distributor
 							}
 						})
 					end