qbsp: delete leftover areaportal leak files on startup

include/qbsp/map.hh

@@ -237,6 +237,7 @@ struct mapdata_t
     // Q2 stuff
     int32_t c_areas = 0;
     int32_t numareaportals = 0;
+    int32_t numareaportal_leaks = 0;
     // running total
     uint32_t brush_offset = 0;
     // Small cache for image meta in the current map

qbsp/portals.cc

@@ -838,10 +838,8 @@ static void DebugAreaPortalBothSidesLeak(node_t *node)
 
     // write `longest_path` as the leak
 
-    mapentity_t *entity = AreanodeEntityForLeaf(node);
-
     fs::path name = qbsp_options.bsp_path;
-    name.replace_extension(fmt::format("areaportal{}_leak.pts", entity - map.entities.data()));
+    name.replace_extension(fmt::format("areaportal_leak{}.pts", map.numareaportal_leaks));
 
     std::ofstream ptsfile(name);
 
@@ -862,6 +860,8 @@ static void DebugAreaPortalBothSidesLeak(node_t *node)
     }
 
     logging::print("Wrote {}\n", name);
+
+    ++map.numareaportal_leaks;
 }
 
 /*

qbsp/qbsp.cc

@@ -1628,6 +1628,16 @@ void InitQBSP(int argc, const char **argv)
         fs::path porfile = qbsp_options.bsp_path;
         porfile.replace_extension("por");
         remove(porfile);
+
+        // areaportal leaks
+        for (int i = 0;; i++) {
+            fs::path name = qbsp_options.bsp_path;
+            name.replace_extension(fmt::format("areaportal_leak{}.pts", i));
+
+            if (!remove(name)) {
+                break;
+            }
+        }
     }
 
     // onlyents might not load this yet