Scanner: pull out pipe ends to their own subcategory

scripts/scanner/backends/single-entity.lua

@@ -2,6 +2,7 @@
 We have to declare categorization and subcategorization functions for everything
 by declaring our backends.  Simple already does everything else for us.
 ]]
+local BuildingTools = require("scripts.building-tools")
 local decl = require("scripts.scanner.backends.simple").declare_simple_backend
 local functionize = require("scripts.functools").functionize
 local Info = require("scripts.fa-info")
@@ -191,4 +192,16 @@ mod.Roboport = decl("fa.scanner.backends.Roboport", {
       return cat2(ent.name, ent.backer_name)
    end,
 })
+
+mod.Pipe = decl("fa.scanner.backends.Pipe", {
+   category_callback = functionize(SC.CATEGORIES.LOGISTICS),
+
+   ---@param ent LuaEntity
+   subcategory_callback = function(ent)
+      local fluids = ent.get_fluid_contents()
+      local fluid = next(fluids) or "<NONE>"
+      local end_part = BuildingTools.is_a_pipe_end(ent) and "<END>" or "<NONE>"
+      return string.format("%s/%s/%s", ent.name, fluid, end_part)
+   end,
+})
 return mod

scripts/scanner/surface-scanner.lua

@@ -85,7 +85,7 @@ local BACKEND_LUT = {
    ["mining-drill"] = SEB.MiningDrill,
    ["offshore-pump"] = SEB.Production,
    ["pipe-to-ground"] = SEB.LogisticsWithFluid,
-   ["pipe"] = SEB.LogisticsWithFluid,
+   ["pipe"] = SEB.Pipe,
    ["player-port"] = SEB.Other,
    ["power-switch"] = SEB.Logistics,
    ["programmable-speaker"] = SEB.Logistics,
@@ -200,7 +200,7 @@ end
 local surface_state = GlobalManager.declare_global_module(
    "scanner",
    new_empty_surface,
-   { root_field = "surfaces", ephemeral_state_version = 4 }
+   { root_field = "surfaces", ephemeral_state_version = 5 }
 )
 
 -- Given a backend setup and an array of entities, dispatch the entities to the