feat: unlinker auto paths (#848)

* chore: extract shared search paths code from modman

* feat: automatically detect search paths for game directories

* chore: adjust log levels for loading and unload search paths

* fix: move iwd to obj common

src/ModMan/Context/FastFileContext.cpp

@@ -2,9 +2,6 @@
 
 #include "Game/AutoSearchPaths.h"
 #include "IObjLoader.h"
-#include "SearchPath/IWD.h"
-#include "SearchPath/SearchPathFilesystem.h"
-#include "Utils/StringUtils.h"
 #include "Web/Binds/ZoneBinds.h"
 #include "Web/UiCommunication.h"
 #include "ZoneLoading.h"
@@ -41,89 +38,15 @@ namespace
         std::string m_zone_name;
         double m_last_progress;
     };
-
-    std::unique_ptr<ISearchPath> CreateSearchPath(const std::string& searchPathStr)
-    {
-        auto searchPath = std::make_unique<SearchPathFilesystem>(searchPathStr);
-        con::debug("Loaded search path \"{}\"", searchPathStr);
-
-        SearchPaths searchPaths;
-        bool hasIwds = false;
-
-        std::filesystem::directory_iterator iterator(searchPathStr);
-        const auto end = fs::end(iterator);
-        for (auto i = fs::begin(iterator); i != end; ++i)
-        {
-            if (!i->is_regular_file())
-                continue;
-
-            auto extension = i->path().extension().string();
-            utils::MakeStringLowerCase(extension);
-            if (extension == ".iwd")
-            {
-                std::string iwdPath = i->path().string();
-                auto iwd = iwd::LoadFromFile(iwdPath);
-                if (iwd)
-                {
-                    if (!hasIwds)
-                    {
-                        searchPaths.CommitSearchPath(std::move(searchPath));
-                        hasIwds = true;
-                    }
-
-                    searchPaths.CommitSearchPath(std::move(iwd));
-                    con::debug("Loaded search path \"{}\"", iwdPath);
-                }
-            }
-        }
-
-        if (hasIwds)
-            return std::make_unique<SearchPaths>(std::move(searchPaths));
-
-        return searchPath;
-    }
 } // namespace
 
-ContextSearchPath::ContextSearchPath(std::unique_ptr<ISearchPath> searchPath)
-    : m_search_path(std::move(searchPath)),
-      m_ref_count(1)
-{
-}
-
-LoadedZone::LoadedZone(std::unique_ptr<Zone> zone, std::string filePath, std::vector<std::string> searchPaths)
-    : m_zone(std::move(zone)),
-      m_file_path(std::move(filePath)),
-      m_search_paths(std::move(searchPaths))
-{
-}
-
-Zone& LoadedZone::GetZone()
-{
-    return *m_zone;
-}
-
-const Zone& LoadedZone::GetZone() const
-{
-    return *m_zone;
-}
-
-const std::string& LoadedZone::GetFilePath() const
-{
-    return m_file_path;
-}
-
-const std::vector<std::string>& LoadedZone::GetSearchPaths() const
-{
-    return m_search_paths;
-}
-
 void FastFileContext::Destroy()
 {
     // Unload all zones
     m_loaded_zones.clear();
 }
 
-std::expected<LoadedZone*, std::string> FastFileContext::LoadFastFile(const std::string& path)
+std::expected<LoadedZoneInformation*, std::string> FastFileContext::LoadFastFile(const std::string& path)
 {
     auto zone = ZoneLoading::LoadZone(path, std::make_unique<LoadingEventProgressReporter>(fs::path(path).filename().replace_extension().string()));
     if (!zone)
@@ -133,24 +56,12 @@ std::expected<LoadedZone*, std::string> FastFileContext::LoadFastFile(const std:
     {
         std::lock_guard lock(m_search_path_lock);
         for (const auto& searchPathStr : searchPathsForZone)
-        {
-            const auto existingSearchPath = m_context_search_paths.find(searchPathStr);
-            if (existingSearchPath == m_context_search_paths.end())
-            {
-                auto searchPath = CreateSearchPath(searchPathStr);
-                m_search_paths.IncludeSearchPath(searchPath.get());
-                m_context_search_paths.emplace(searchPathStr, std::make_unique<ContextSearchPath>(std::move(searchPath)));
-            }
-            else
-            {
-                existingSearchPath->second->m_ref_count++;
-            }
-        }
+            m_shared_search_paths.RefSearchPath(searchPathStr);
     }
 
-    auto loadedZone = std::make_unique<LoadedZone>(std::move(*zone), path, std::move(searchPathsForZone));
+    auto loadedZone = std::make_unique<LoadedZoneInformation>(std::move(*zone), path, std::move(searchPathsForZone));
 
-    LoadedZone* loadedZonePtr;
+    LoadedZoneInformation* loadedZonePtr;
     {
         std::lock_guard lock(m_zone_lock);
         loadedZonePtr = m_loaded_zones.emplace_back(std::move(loadedZone)).get();
@@ -158,7 +69,8 @@ std::expected<LoadedZone*, std::string> FastFileContext::LoadFastFile(const std:
 
     {
         std::shared_lock lock(m_search_path_lock);
-        IObjLoader::GetObjLoaderForGame(loadedZonePtr->GetZone().m_game_id)->LoadReferencedContainersForZone(m_search_paths, loadedZonePtr->GetZone());
+        auto* objLoader = IObjLoader::GetObjLoaderForGame(loadedZonePtr->GetZone().m_game_id);
+        objLoader->LoadReferencedContainersForZone(m_shared_search_paths.GetSearchPath(), loadedZonePtr->GetZone());
     }
 
     ui::NotifyZoneLoaded(*loadedZonePtr);
@@ -168,12 +80,12 @@ std::expected<LoadedZone*, std::string> FastFileContext::LoadFastFile(const std:
 
 std::expected<void, std::string> FastFileContext::UnloadZone(const std::string& zoneName)
 {
-    std::unique_ptr<LoadedZone> removedLoadedZone;
+    std::unique_ptr<LoadedZoneInformation> removedLoadedZone;
 
     {
         std::lock_guard lock(m_zone_lock);
         const auto existingZone = std::ranges::find_if(m_loaded_zones,
-                                                       [&zoneName](const std::unique_ptr<LoadedZone>& loadedZone)
+                                                       [&zoneName](const std::unique_ptr<LoadedZoneInformation>& loadedZone)
                                                        {
                                                            return loadedZone->GetZone().m_name == zoneName;
                                                        });
@@ -197,32 +109,18 @@ std::expected<void, std::string> FastFileContext::UnloadZone(const std::string&
     {
         std::lock_guard lock(m_search_path_lock);
         for (const auto& searchPathStr : removedLoadedZone->GetSearchPaths())
-        {
-            const auto existingSearchPath = m_context_search_paths.find(searchPathStr);
-            if (existingSearchPath != m_context_search_paths.end())
-            {
-                assert(existingSearchPath->second->m_ref_count > 0);
-                const auto newRefCount = --existingSearchPath->second->m_ref_count;
-
-                if (newRefCount == 0)
-                {
-                    m_search_paths.RemoveSearchPath(existingSearchPath->second->m_search_path.get());
-                    m_context_search_paths.erase(existingSearchPath);
-                    con::debug("Unloaded search path \"{}\"", searchPathStr);
-                }
-            }
-        }
+            m_shared_search_paths.UnrefSearchPath(searchPathStr);
     }
 
     return {};
 }
 
-ReadAccess<const std::vector<std::unique_ptr<LoadedZone>>> FastFileContext::GetLoadedZones()
+ReadAccess<const std::vector<std::unique_ptr<LoadedZoneInformation>>> FastFileContext::GetLoadedZones()
 {
-    return ReadAccess<const std::vector<std::unique_ptr<LoadedZone>>>(std::shared_lock(m_zone_lock), m_loaded_zones);
+    return ReadAccess<const std::vector<std::unique_ptr<LoadedZoneInformation>>>(std::shared_lock(m_zone_lock), m_loaded_zones);
 }
 
 ReadAccess<ISearchPath> FastFileContext::GetSearchPaths()
 {
-    return ReadAccess<ISearchPath>(std::shared_lock(m_search_path_lock), m_search_paths);
+    return ReadAccess(std::shared_lock(m_search_path_lock), m_shared_search_paths.GetSearchPath());
 }

src/ModMan/Context/FastFileContext.h

@@ -1,41 +1,15 @@
 #pragma once
 
-#include "SearchPath/SearchPaths.h"
+#include "SearchPath/SharedSearchPaths.h"
+#include "Zone/LoadedZoneInformation.h"
 #include "Zone/Zone.h"
 
 #include <expected>
 #include <memory>
 #include <shared_mutex>
 #include <string>
-#include <unordered_map>
 #include <vector>
 
-class ContextSearchPath
-{
-public:
-    explicit ContextSearchPath(std::unique_ptr<ISearchPath> searchPath);
-
-    std::unique_ptr<ISearchPath> m_search_path;
-    unsigned m_ref_count;
-};
-
-class LoadedZone
-{
-public:
-    LoadedZone(std::unique_ptr<Zone> zone, std::string filePath, std::vector<std::string> searchPaths);
-
-    [[nodiscard]] Zone& GetZone();
-    [[nodiscard]] const Zone& GetZone() const;
-
-    [[nodiscard]] const std::string& GetFilePath() const;
-    [[nodiscard]] const std::vector<std::string>& GetSearchPaths() const;
-
-private:
-    std::unique_ptr<Zone> m_zone;
-    std::string m_file_path;
-    std::vector<std::string> m_search_paths;
-};
-
 template<class T> class ReadAccess
 {
 public:
@@ -60,17 +34,16 @@ class FastFileContext
 public:
     void Destroy();
 
-    std::expected<LoadedZone*, std::string> LoadFastFile(const std::string& path);
+    std::expected<LoadedZoneInformation*, std::string> LoadFastFile(const std::string& path);
     std::expected<void, std::string> UnloadZone(const std::string& zoneName);
 
-    ReadAccess<const std::vector<std::unique_ptr<LoadedZone>>> GetLoadedZones();
+    ReadAccess<const std::vector<std::unique_ptr<LoadedZoneInformation>>> GetLoadedZones();
     ReadAccess<ISearchPath> GetSearchPaths();
 
 private:
-    std::vector<std::unique_ptr<LoadedZone>> m_loaded_zones;
+    std::vector<std::unique_ptr<LoadedZoneInformation>> m_loaded_zones;
     std::shared_mutex m_zone_lock;
 
-    SearchPaths m_search_paths;
-    std::unordered_map<std::string, std::unique_ptr<ContextSearchPath>> m_context_search_paths;
+    SharedSearchPaths m_shared_search_paths;
     std::shared_mutex m_search_path_lock;
 };

src/ModMan/Web/Binds/UnlinkingBinds.cpp

@@ -57,7 +57,7 @@ namespace
             auto& context = ModManContext::Get().m_fast_file;
             const auto loadedZones = context.GetLoadedZones();
             const auto existingZone = std::ranges::find_if(loadedZones.Data(),
-                                                           [&zoneName](const std::unique_ptr<LoadedZone>& loadedZone)
+                                                           [&zoneName](const std::unique_ptr<LoadedZoneInformation>& loadedZone)
                                                            {
                                                                return loadedZone->GetZone().m_name == zoneName;
                                                            });

src/ModMan/Web/Binds/ZoneBinds.cpp

@@ -61,7 +61,7 @@ namespace
 
     NLOHMANN_DEFINE_TYPE_EXTENSION(ZoneUnloadedDto, zoneName);
 
-    ZoneDto CreateZoneDto(const LoadedZone& loadedZone)
+    ZoneDto CreateZoneDto(const LoadedZoneInformation& loadedZone)
     {
         return ZoneDto{
             .name = loadedZone.GetZone().m_name,
@@ -149,7 +149,7 @@ namespace ui
         Notify(*ModManContext::Get().m_main_window, "zoneLoadProgress", dto);
     }
 
-    void NotifyZoneLoaded(const LoadedZone& loadedZone)
+    void NotifyZoneLoaded(const LoadedZoneInformation& loadedZone)
     {
         const ZoneLoadedDto dto{
             .zone = CreateZoneDto(loadedZone),

src/ModMan/Web/Binds/ZoneBinds.h

@@ -6,7 +6,7 @@
 namespace ui
 {
     void NotifyZoneLoadProgress(std::string zoneName, double percentage);
-    void NotifyZoneLoaded(const LoadedZone& loadedZone);
+    void NotifyZoneLoaded(const LoadedZoneInformation& loadedZone);
     void NotifyZoneUnloaded(std::string zoneName);
 
     void RegisterZoneBinds(webwindowed::commands_builder& commands);

src/ObjCommon/SearchPath/IWD.cpp

@@ -1,6 +1,5 @@
 #include "IWD.h"
 
-#include "ObjLoading.h"
 #include "Utils/FileToZlibWrapper.h"
 #include "Utils/Logging/Log.h"
 

src/ObjCommon/SearchPath/SharedSearchPaths.cpp

@@ -0,0 +1,115 @@
+#include "SharedSearchPaths.h"
+
+#include "SearchPath/IWD.h"
+#include "SearchPathFilesystem.h"
+#include "Utils/Logging/Log.h"
+#include "Utils/StringUtils.h"
+
+#include <cassert>
+#include <filesystem>
+
+namespace fs = std::filesystem;
+
+namespace
+{
+    std::unique_ptr<ISearchPath> CreateSearchPath(const std::string& searchPathStr)
+    {
+        auto searchPath = std::make_unique<SearchPathFilesystem>(searchPathStr);
+        con::info("Loaded search path \"{}\"", searchPathStr);
+
+        SearchPaths searchPaths;
+        bool hasIwds = false;
+
+        std::filesystem::directory_iterator iterator(searchPathStr);
+        const auto end = fs::end(iterator);
+        for (auto i = fs::begin(iterator); i != end; ++i)
+        {
+            if (!i->is_regular_file())
+                continue;
+
+            auto extension = i->path().extension().string();
+            utils::MakeStringLowerCase(extension);
+            if (extension == ".iwd")
+            {
+                std::string iwdPath = i->path().string();
+                auto iwd = iwd::LoadFromFile(iwdPath);
+                if (iwd)
+                {
+                    if (!hasIwds)
+                    {
+                        searchPaths.CommitSearchPath(std::move(searchPath));
+                        hasIwds = true;
+                    }
+
+                    searchPaths.CommitSearchPath(std::move(iwd));
+                }
+            }
+        }
+
+        if (hasIwds)
+            return std::make_unique<SearchPaths>(std::move(searchPaths));
+
+        return searchPath;
+    }
+} // namespace
+
+SharedSearchPathEntry::SharedSearchPathEntry(std::unique_ptr<ISearchPath> searchPath)
+    : m_search_path(std::move(searchPath)),
+      m_ref_count(1)
+{
+}
+
+SharedSearchPaths::SharedSearchPaths() = default;
+
+SharedSearchPaths::~SharedSearchPaths()
+{
+    Clear();
+}
+
+void SharedSearchPaths::Clear()
+{
+    for (auto& entry : m_search_path_entries)
+    {
+        entry.second.reset();
+        con::info("Unloaded search path \"{}\"", entry.first);
+    }
+    m_search_path_entries.clear();
+    m_search_paths = SearchPaths();
+}
+
+ISearchPath& SharedSearchPaths::GetSearchPath()
+{
+    return m_search_paths;
+}
+
+void SharedSearchPaths::RefSearchPath(const std::string& searchPathStr)
+{
+    const auto existingSearchPath = m_search_path_entries.find(searchPathStr);
+    if (existingSearchPath == m_search_path_entries.end())
+    {
+        auto searchPath = CreateSearchPath(searchPathStr);
+        m_search_paths.IncludeSearchPath(searchPath.get());
+        m_search_path_entries.emplace(searchPathStr, std::make_unique<SharedSearchPathEntry>(std::move(searchPath)));
+    }
+    else
+    {
+        existingSearchPath->second->m_ref_count++;
+    }
+}
+
+void SharedSearchPaths::UnrefSearchPath(const std::string& searchPathStr)
+{
+    const auto existingSearchPath = m_search_path_entries.find(searchPathStr);
+    if (existingSearchPath != m_search_path_entries.end())
+    {
+        assert(existingSearchPath->second->m_ref_count > 0);
+        const auto newRefCount = --existingSearchPath->second->m_ref_count;
+
+        if (newRefCount == 0)
+        {
+            m_search_paths.RemoveSearchPath(existingSearchPath->second->m_search_path.get());
+            m_search_path_entries.erase(existingSearchPath);
+            con::info("Unloaded search path \"{}\"", searchPathStr);
+        }
+    }
+}

src/ObjCommon/SearchPath/SharedSearchPaths.h

@@ -0,0 +1,39 @@
+#pragma once
+
+#include "SearchPaths.h"
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+class SharedSearchPathEntry
+{
+public:
+    explicit SharedSearchPathEntry(std::unique_ptr<ISearchPath> searchPath);
+
+    std::unique_ptr<ISearchPath> m_search_path;
+    unsigned m_ref_count;
+};
+
+class SharedSearchPaths
+{
+public:
+    SharedSearchPaths();
+    ~SharedSearchPaths();
+
+    SharedSearchPaths(const SharedSearchPaths& other) = delete;
+    SharedSearchPaths(SharedSearchPaths&& other) noexcept = default;
+    SharedSearchPaths& operator=(const SharedSearchPaths& other) = delete;
+    SharedSearchPaths& operator=(SharedSearchPaths&& other) noexcept = default;
+
+    void Clear();
+
+    [[nodiscard]] ISearchPath& GetSearchPath();
+
+    void RefSearchPath(const std::string& searchPathStr);
+    void UnrefSearchPath(const std::string& searchPathStr);
+
+private:
+    SearchPaths m_search_paths;
+    std::unordered_map<std::string, std::unique_ptr<SharedSearchPathEntry>> m_search_path_entries;
+};

src/ObjLoading/Game/AutoSearchPaths.cpp

@@ -2,6 +2,7 @@
 
 #include "IW3/AutoSearchPathsIW3.h"
 #include "IW4/AutoSearchPathsIW4.h"
+#include "IW4/InfoString/InfoStringToStructConverter.h"
 #include "IW5/AutoSearchPathsIW5.h"
 #include "T4/AutoSearchPathsT4.h"
 #include "T5/AutoSearchPathsT5.h"
@@ -45,6 +46,8 @@ std::vector<std::string> AutoSearchPaths::GetSearchPathsForZonePath(const std::s
     if (!maybeGameRootFolder)
         return {folderName};
 
+    con::debug("Detected game directory: {}", *maybeGameRootFolder);
+
     std::vector<std::string> result;
     const fs::path gameRootFolderPath(*maybeGameRootFolder);
 

src/Unlinking/Unlinker.cpp

@@ -1,26 +1,86 @@
 #include "Unlinker.h"
 
 #include "ContentLister/ContentPrinter.h"
+#include "Game/AutoSearchPaths.h"
 #include "IObjLoader.h"
 #include "ObjWriter.h"
 #include "ObjWriting.h"
-#include "SearchPath/IWD.h"
 #include "SearchPath/OutputPathFilesystem.h"
+#include "SearchPath/SharedSearchPaths.h"
 #include "UnlinkerArgs.h"
-#include "UnlinkerPaths.h"
 #include "Utils/Logging/Log.h"
 #include "Zone/Definition/ZoneDefWriter.h"
+#include "Zone/LoadedZoneInformation.h"
 #include "ZoneLoading.h"
 
-#include <cassert>
 #include <filesystem>
 #include <format>
 #include <fstream>
+#include <ranges>
 
 namespace fs = std::filesystem;
 
 namespace
 {
+    class ReferencedSearchPaths
+    {
+    public:
+        ReferencedSearchPaths()
+            : m_shared_search_paths(nullptr)
+        {
+        }
+
+        ReferencedSearchPaths(SharedSearchPaths& sharedSearchPaths, std::vector<std::string> searchPaths)
+            : m_shared_search_paths(&sharedSearchPaths),
+              m_search_paths(std::move(searchPaths))
+        {
+        }
+
+        ~ReferencedSearchPaths()
+        {
+            Clear();
+        }
+
+        ReferencedSearchPaths(const ReferencedSearchPaths& other) = delete;
+
+        ReferencedSearchPaths(ReferencedSearchPaths&& other) noexcept
+            : m_shared_search_paths(other.m_shared_search_paths),
+              m_search_paths(std::move(other.m_search_paths))
+        {
+            other.m_shared_search_paths = nullptr;
+        }
+
+        ReferencedSearchPaths& operator=(const ReferencedSearchPaths& other) = delete;
+
+        ReferencedSearchPaths& operator=(ReferencedSearchPaths&& other) noexcept
+        {
+            m_shared_search_paths = other.m_shared_search_paths;
+            other.m_shared_search_paths = nullptr;
+            m_search_paths = std::move(other.m_search_paths);
+
+            return *this;
+        }
+
+        void Clear()
+        {
+            if (m_shared_search_paths)
+            {
+                for (const auto& searchPath : m_search_paths)
+                    m_shared_search_paths->UnrefSearchPath(searchPath);
+            }
+            m_shared_search_paths = nullptr;
+        }
+
+    private:
+        SharedSearchPaths* m_shared_search_paths;
+        std::vector<std::string> m_search_paths;
+    };
+
+    [[nodiscard]] std::vector<std::string> GetSearchPathsForZone(const std::string& zonePath, const GameId gameId)
+    {
+        return AutoSearchPaths::GetForGame(gameId)->GetSearchPathsForZonePath(zonePath);
+    }
+
     class UnlinkerImpl : public Unlinker
     {
     public:
@@ -31,16 +91,18 @@ namespace
 
         bool Start() override
         {
-            UnlinkerPaths paths;
-            if (!paths.LoadUserPaths(m_args))
-                return false;
+            SharedSearchPaths paths;
+            for (const auto& userPath : m_args.m_user_search_paths)
+                paths.RefSearchPath(userPath);
 
             if (!LoadZones(paths))
                 return false;
 
             const auto result = UnlinkZones(paths);
 
-            UnloadZones();
+            UnloadZones(paths);
+
+            paths.Clear();
 
             Summarize(result);
 
@@ -203,7 +265,7 @@ namespace
             return true;
         }
 
-        bool LoadZones(UnlinkerPaths& paths)
+        bool LoadZones(SharedSearchPaths& paths)
         {
             for (const auto& zonePath : m_args.m_zones_to_load)
             {
@@ -215,7 +277,6 @@ namespace
 
                 auto absoluteZoneDirectory = absolute(std::filesystem::path(zonePath).remove_filename()).string();
 
-                auto searchPathsForZone = paths.GetSearchPathsForZone(absoluteZoneDirectory);
                 auto maybeZone = ZoneLoading::LoadZone(zonePath, std::nullopt);
                 if (!maybeZone)
                 {
@@ -225,44 +286,53 @@ namespace
 
                 auto zone = std::move(*maybeZone);
 
-                con::debug("Loaded zone \"{}\"", zone->m_name);
+                con::info("Loaded zone \"{}\"", zone->m_name);
+
+                auto searchPathsForZone = GetSearchPathsForZone(absoluteZoneDirectory, zone->m_game_id);
+                for (const auto& searchPath : searchPathsForZone)
+                    paths.RefSearchPath(searchPath);
 
                 if (ShouldLoadObj())
                 {
                     const auto* objLoader = IObjLoader::GetObjLoaderForGame(zone->m_game_id);
-                    objLoader->LoadReferencedContainersForZone(*searchPathsForZone, *zone);
+                    objLoader->LoadReferencedContainersForZone(paths.GetSearchPath(), *zone);
                 }
 
-                m_loaded_zones.emplace_back(std::move(zone));
+                m_loaded_zones.emplace_back(
+                    std::make_unique<LoadedZoneInformation>(std::move(zone), std::move(absoluteZoneDirectory), std::move(searchPathsForZone)));
             }
 
             return true;
         }
 
-        void UnloadZones()
+        void UnloadZones(SharedSearchPaths& paths)
         {
-            for (auto i = m_loaded_zones.rbegin(); i != m_loaded_zones.rend(); ++i)
+            for (auto& loadedZone : std::ranges::reverse_view(m_loaded_zones))
             {
-                auto& loadedZone = *i;
-
                 // Copy zone name since we deallocate before logging
-                const auto zoneName = loadedZone->m_name;
+                const auto zoneName = loadedZone->GetZone().m_name;
 
                 if (ShouldLoadObj())
                 {
-                    const auto* objLoader = IObjLoader::GetObjLoaderForGame(loadedZone->m_game_id);
-                    objLoader->UnloadContainersOfZone(*loadedZone);
+                    const auto* objLoader = IObjLoader::GetObjLoaderForGame(loadedZone->GetZone().m_game_id);
+                    objLoader->UnloadContainersOfZone(loadedZone->GetZone());
                 }
 
+                for (const auto& searchPath : loadedZone->GetSearchPaths())
+                    paths.UnrefSearchPath(searchPath);
+
                 loadedZone.reset();
 
-                con::debug("Unloaded zone \"{}\"", zoneName);
+                con::info("Unloaded zone \"{}\"", zoneName);
             }
+
             m_loaded_zones.clear();
         }
 
-        bool UnlinkZones(UnlinkerPaths& paths) const
+        bool UnlinkZones(SharedSearchPaths& paths) const
         {
+            ReferencedSearchPaths previousSearchPaths;
+
             for (const auto& zonePath : m_args.m_zones_to_unlink)
             {
                 if (!fs::is_regular_file(zonePath))
@@ -276,8 +346,6 @@ namespace
                     zoneDirectory = fs::current_path();
                 auto absoluteZoneDirectory = absolute(zoneDirectory).string();
 
-                auto searchPathsForZone = paths.GetSearchPathsForZone(absoluteZoneDirectory);
-
                 auto maybeZone = ZoneLoading::LoadZone(zonePath, std::nullopt);
                 if (!maybeZone)
                 {
@@ -287,13 +355,20 @@ namespace
 
                 auto zone = std::move(*maybeZone);
 
-                con::debug("Loaded zone \"{}\"", zone->m_name);
+                con::info("Loaded zone \"{}\"", zone->m_name);
+
+                auto searchPathsForZone = GetSearchPathsForZone(absoluteZoneDirectory, zone->m_game_id);
+                for (const auto& searchPath : searchPathsForZone)
+                    paths.RefSearchPath(searchPath);
+
+                previousSearchPaths.Clear();
+                previousSearchPaths = ReferencedSearchPaths(paths, std::move(searchPathsForZone));
 
                 const auto* objLoader = IObjLoader::GetObjLoaderForGame(zone->m_game_id);
                 if (ShouldLoadObj())
-                    objLoader->LoadReferencedContainersForZone(*searchPathsForZone, *zone);
+                    objLoader->LoadReferencedContainersForZone(paths.GetSearchPath(), *zone);
 
-                if (!HandleZone(*searchPathsForZone, *zone))
+                if (!HandleZone(paths.GetSearchPath(), *zone))
                     return false;
 
                 if (ShouldLoadObj())
@@ -302,9 +377,11 @@ namespace
                 // Copy zone name for using it after freeing the zone
                 std::string zoneName = zone->m_name;
                 zone.reset();
-                con::debug("Unloaded zone \"{}\"", zoneName);
+                con::info("Unloaded zone \"{}\"", zoneName);
             }
 
+            previousSearchPaths.Clear();
+
             return true;
         }
 
@@ -315,7 +392,7 @@ namespace
         }
 
         UnlinkerArgs m_args;
-        std::vector<std::unique_ptr<Zone>> m_loaded_zones;
+        std::vector<std::unique_ptr<LoadedZoneInformation>> m_loaded_zones;
     };
 } // namespace
 

src/Unlinking/UnlinkerPaths.cpp

@@ -1,91 +0,0 @@
-#include "UnlinkerPaths.h"
-
-#include "SearchPath/IWD.h"
-#include "SearchPath/SearchPathFilesystem.h"
-#include "Utils/Logging/Log.h"
-#include "Utils/StringUtils.h"
-
-#include <filesystem>
-#include <format>
-#include <iostream>
-
-namespace fs = std::filesystem;
-
-bool UnlinkerPaths::LoadUserPaths(const UnlinkerArgs& args)
-{
-    for (const auto& path : args.m_user_search_paths)
-    {
-        auto absolutePath = fs::absolute(path);
-
-        if (!fs::is_directory(absolutePath))
-        {
-            con::error("Could not find directory of search path: \"{}\"", path);
-            return false;
-        }
-
-        auto searchPathName = absolutePath.string();
-        m_user_paths.CommitSearchPath(std::make_unique<SearchPathFilesystem>(searchPathName));
-        m_specified_user_paths.emplace(std::move(searchPathName));
-
-        std::filesystem::directory_iterator iterator(absolutePath);
-        const auto end = fs::end(iterator);
-        for (auto i = fs::begin(iterator); i != end; ++i)
-        {
-            if (!i->is_regular_file())
-                continue;
-
-            auto extension = i->path().extension().string();
-            utils::MakeStringLowerCase(extension);
-            if (extension == ".iwd")
-            {
-                auto iwd = iwd::LoadFromFile(i->path().string());
-                if (iwd)
-                    m_user_paths.CommitSearchPath(std::move(iwd));
-            }
-        }
-    }
-
-    con::info("{} SearchPaths{}", m_specified_user_paths.size(), !m_specified_user_paths.empty() ? ":" : "");
-    for (const auto& absoluteSearchPath : m_specified_user_paths)
-        con::info("  \"{}\"", absoluteSearchPath);
-
-    if (!m_specified_user_paths.empty())
-        con::info("");
-
-    return true;
-}
-
-std::unique_ptr<ISearchPath> UnlinkerPaths::GetSearchPathsForZone(const std::string& zonePath)
-{
-    const auto absoluteZoneDirectory = fs::absolute(std::filesystem::path(zonePath).remove_filename());
-    const auto absoluteZoneDirectoryString = absoluteZoneDirectory.string();
-    if (m_last_zone_path != absoluteZoneDirectoryString)
-    {
-        m_last_zone_path = absoluteZoneDirectoryString;
-        m_last_zone_search_paths = SearchPaths();
-        m_last_zone_search_paths.CommitSearchPath(std::make_unique<SearchPathFilesystem>(absoluteZoneDirectoryString));
-
-        std::filesystem::directory_iterator iterator(absoluteZoneDirectory);
-        const auto end = fs::end(iterator);
-        for (auto i = fs::begin(iterator); i != end; ++i)
-        {
-            if (!i->is_regular_file())
-                continue;
-
-            auto extension = i->path().extension().string();
-            utils::MakeStringLowerCase(extension);
-            if (extension == ".iwd")
-            {
-                auto iwd = iwd::LoadFromFile(i->path().string());
-                if (iwd)
-                    m_last_zone_search_paths.CommitSearchPath(std::move(iwd));
-            }
-        }
-    }
-
-    auto result = std::make_unique<SearchPaths>();
-    result->IncludeSearchPath(&m_last_zone_search_paths);
-    result->IncludeSearchPath(&m_user_paths);
-
-    return result;
-}

src/Unlinking/UnlinkerPaths.h

@@ -1,21 +0,0 @@
-#pragma once
-
-#include "SearchPath/SearchPaths.h"
-#include "UnlinkerArgs.h"
-
-#include <string>
-#include <unordered_set>
-
-class UnlinkerPaths
-{
-public:
-    bool LoadUserPaths(const UnlinkerArgs& args);
-    std::unique_ptr<ISearchPath> GetSearchPathsForZone(const std::string& zonePath);
-
-private:
-    std::string m_last_zone_path;
-    SearchPaths m_last_zone_search_paths;
-
-    std::unordered_set<std::string> m_specified_user_paths;
-    SearchPaths m_user_paths;
-};

src/ZoneCommon/Zone/LoadedZoneInformation.cpp

@@ -0,0 +1,28 @@
+#include "LoadedZoneInformation.h"
+
+LoadedZoneInformation::LoadedZoneInformation(std::unique_ptr<Zone> zone, std::string filePath, std::vector<std::string> searchPaths)
+    : m_zone(std::move(zone)),
+      m_file_path(std::move(filePath)),
+      m_search_paths(std::move(searchPaths))
+{
+}
+
+Zone& LoadedZoneInformation::GetZone()
+{
+    return *m_zone;
+}
+
+const Zone& LoadedZoneInformation::GetZone() const
+{
+    return *m_zone;
+}
+
+const std::string& LoadedZoneInformation::GetFilePath() const
+{
+    return m_file_path;
+}
+
+const std::vector<std::string>& LoadedZoneInformation::GetSearchPaths() const
+{
+    return m_search_paths;
+}

src/ZoneCommon/Zone/LoadedZoneInformation.h

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "Zone.h"
+
+#include <memory>
+#include <string>
+#include <vector>
+
+class LoadedZoneInformation
+{
+public:
+    LoadedZoneInformation(std::unique_ptr<Zone> zone, std::string filePath, std::vector<std::string> searchPaths);
+
+    [[nodiscard]] Zone& GetZone();
+    [[nodiscard]] const Zone& GetZone() const;
+
+    [[nodiscard]] const std::string& GetFilePath() const;
+    [[nodiscard]] const std::vector<std::string>& GetSearchPaths() const;
+
+private:
+    std::unique_ptr<Zone> m_zone;
+    std::string m_file_path;
+    std::vector<std::string> m_search_paths;
+};