Log more information when navmeshtool fails on not enough space

apps/navmeshtool/main.cpp

@@ -171,8 +171,9 @@ namespace NavMeshTool
 
             const osg::Vec3f agentHalfExtents = Settings::Manager::getVector3("default actor pathfind half extents", "Game");
             const std::uint64_t maxDbFileSize = static_cast<std::uint64_t>(Settings::Manager::getInt64("max navmeshdb file size", "Navigator"));
+            const std::string dbPath = (config.getUserDataPath() / "navmesh.db").string();
 
-            DetourNavigator::NavMeshDb db((config.getUserDataPath() / "navmesh.db").string(), maxDbFileSize);
+            DetourNavigator::NavMeshDb db(dbPath, maxDbFileSize);
 
             std::vector<ESM::ESMReader> readers(contentFiles.size());
             EsmLoader::Query query;
@@ -196,10 +197,24 @@ namespace NavMeshTool
             WorldspaceData cellsData = gatherWorldspaceData(navigatorSettings, readers, vfs, bulletShapeManager,
                                                             esmData, processInteriorCells, writeBinaryLog);
 
-            generateAllNavMeshTiles(agentHalfExtents, navigatorSettings, threadsNumber, removeUnusedTiles,
+            const Status status = generateAllNavMeshTiles(agentHalfExtents, navigatorSettings, threadsNumber,
-                                    writeBinaryLog, cellsData, std::move(db));
+                removeUnusedTiles, writeBinaryLog, cellsData, std::move(db));
 
-            Log(Debug::Info) << "Done";
+            switch (status)
+            {
+                case Status::Ok:
+                    Log(Debug::Info) << "Done";
+                    break;
+                case Status::Cancelled:
+                    Log(Debug::Warning) << "Cancelled";
+                    break;
+                case Status::NotEnoughSpace:
+                    Log(Debug::Warning) << "Navmesh genration is cancelled due to running out of disk space or limits "
+                        << "for navmesh db. Check disk space at the db location \"" << dbPath
+                        << "\". If there is enough space, adjust \"max navmeshdb file size\" setting (see "
+                        << "https://openmw.readthedocs.io/en/latest/reference/modding/settings/navigator.html?highlight=navmesh#max-navmeshdb-file-size).";
+                    break;
+            }
 
             return 0;
         }

apps/navmeshtool/navmesh.cpp

@@ -169,19 +169,22 @@ namespace NavMeshTool
                 report();
             }
 
-            void cancel() override
+            void cancel(std::string_view reason) override
             {
                 std::unique_lock lock(mMutex);
-                mCancelled = true;
+                if (reason.find("database or disk is full") != std::string_view::npos)
+                    mStatus = Status::NotEnoughSpace;
+                else
+                    mStatus = Status::Cancelled;
                 mHasTile.notify_one();
             }
 
-            bool wait()
+            Status wait()
             {
                 constexpr std::chrono::seconds transactionInterval(1);
                 std::unique_lock lock(mMutex);
                 auto start = std::chrono::steady_clock::now();
-                while (mProvided < mExpected && !mCancelled)
+                while (mProvided < mExpected && mStatus == Status::Ok)
                 {
                     mHasTile.wait(lock);
                     const auto now = std::chrono::steady_clock::now();
@@ -195,7 +198,7 @@ namespace NavMeshTool
                 logGeneratedTiles(mProvided, mExpected);
                 if (mWriteBinaryLog)
                     logGeneratedTilesMessage(mProvided);
-                return !mCancelled;
+                return mStatus;
             }
 
             void commit()
@@ -224,7 +227,7 @@ namespace NavMeshTool
             std::atomic_size_t mInserted {0};
             std::atomic_size_t mUpdated {0};
             std::size_t mDeleted = 0;
-            bool mCancelled = false;
+            Status mStatus = Status::Ok;
             mutable std::mutex mMutex;
             NavMeshDb mDb;
             const bool mRemoveUnusedTiles;
@@ -247,7 +250,7 @@ namespace NavMeshTool
         };
     }
 
-    void generateAllNavMeshTiles(const osg::Vec3f& agentHalfExtents, const Settings& settings,
+    Status generateAllNavMeshTiles(const osg::Vec3f& agentHalfExtents, const Settings& settings,
         std::size_t threadsNumber, bool removeUnusedTiles, bool writeBinaryLog, WorldspaceData& data,
         NavMeshDb&& db)
     {
@@ -294,7 +297,8 @@ namespace NavMeshTool
                 ));
         }
 
-        if (navMeshTileConsumer->wait())
+        const Status status = navMeshTileConsumer->wait();
+        if (status == Status::Ok)
             navMeshTileConsumer->commit();
 
         const auto inserted = navMeshTileConsumer->getInserted();
@@ -311,5 +315,7 @@ namespace NavMeshTool
             Log(Debug::Info) << "Vacuuming the database...";
             navMeshTileConsumer->vacuum();
         }
+
+        return status;
     }
 }

apps/navmeshtool/navmesh.hpp

@@ -15,7 +15,14 @@ namespace NavMeshTool
 {
     struct WorldspaceData;
 
-    void generateAllNavMeshTiles(const osg::Vec3f& agentHalfExtents, const DetourNavigator::Settings& settings,
+    enum class Status
+    {
+        Ok,
+        Cancelled,
+        NotEnoughSpace,
+    };
+
+    Status generateAllNavMeshTiles(const osg::Vec3f& agentHalfExtents, const DetourNavigator::Settings& settings,
         std::size_t threadsNumber, bool removeUnusedTiles, bool writeBinaryLog, WorldspaceData& cellsData,
         DetourNavigator::NavMeshDb&& db);
 }

components/detournavigator/generatenavmeshtile.cpp

@@ -96,7 +96,7 @@ namespace DetourNavigator
         {
             Log(Debug::Warning) << "Failed to generate navmesh for worldspace \"" << mWorldspace
                                 << "\" tile " << mTilePosition << ": " << e.what();
-            consumer->cancel();
+            consumer->cancel(e.what());
         }
     }
 }

components/detournavigator/generatenavmeshtile.hpp

@@ -50,7 +50,7 @@ namespace DetourNavigator
         virtual void update(std::string_view worldspace, const TilePosition& tilePosition,
                             std::int64_t tileId, std::int64_t version, PreparedNavMeshData& data) = 0;
 
-        virtual void cancel() = 0;
+        virtual void cancel(std::string_view reason) = 0;
     };
 
     class GenerateNavMeshTile final : public SceneUtil::WorkItem