From 7c924218d3772b38f894a42da65a755155efacdb Mon Sep 17 00:00:00 2001
From: Najeeb Al-Shabibi <najeeb.al.shabibi@gmail.com>
Date: Mon, 25 Sep 2023 18:06:21 +0100
Subject: [PATCH] constructionIsUnsupported() - early return if unreachable to
 reduce spam

---
 suspendmanager.lua | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/suspendmanager.lua b/suspendmanager.lua
index a37cd28dee..2de83aecec 100644
--- a/suspendmanager.lua
+++ b/suspendmanager.lua
@@ -409,6 +409,13 @@ local function neighboursFloorSupportsFloor(pos)
     }
 end
 
+local function hasWalkableNeighbour(pos)
+    for _,n in pairs(neighbours(pos)) do
+        if (walkable(n)) then return true end
+    end
+    return false
+end
+
 local function tileHasSupportWall(pos)
     local tt = dfhack.maps.getTileType(pos)
     if tt then
@@ -443,6 +450,10 @@ local function constructionIsUnsupported(job)
 
     local pos = {x=building.centerx, y=building.centery,z=building.z}
 
+    -- if no neighbour is walkable it can't be constructed now anyways,
+    -- this early return helps reduce "spam"
+    if not hasWalkableNeighbour(pos) then return false end
+
     -- find out what type of construction
     local constr_type = building:getSubtype()
     local wall_would_support = {}