Only instantiate SearchPluginManager as needed

src/app/application.cpp

@@ -515,7 +515,6 @@ int Application::exec(const QStringList &params)
 
     new RSS::Session; // create RSS::Session singleton
     new RSS::AutoDownloader; // create RSS::AutoDownloader singleton
-    new SearchPluginManager;
 
 #ifdef DISABLE_GUI
 #ifndef DISABLE_WEBUI
@@ -710,7 +709,6 @@ void Application::cleanup()
     delete m_webui;
 #endif
 
-    delete SearchPluginManager::instance();
     delete RSS::AutoDownloader::instance();
     delete RSS::Session::instance();
 
@@ -726,6 +724,7 @@ void Application::cleanup()
     delete m_fileLogger;
     Logger::freeInstance();
     IconProvider::freeInstance();
+    SearchPluginManager::freeInstance();
     Utils::Fs::removeDirRecursive(Utils::Fs::tempPath());
 
 #ifndef DISABLE_GUI

src/base/search/searchpluginmanager.cpp

@@ -101,9 +101,17 @@ SearchPluginManager::~SearchPluginManager()
 
 SearchPluginManager *SearchPluginManager::instance()
 {
+    if (!m_instance)
+        m_instance = new SearchPluginManager;
     return m_instance;
 }
 
+void SearchPluginManager::freeInstance()
+{
+    if (m_instance)
+        delete m_instance;
+}
+
 QStringList SearchPluginManager::allPlugins() const
 {
     return m_plugins.keys();

src/base/search/searchpluginmanager.h

@@ -62,6 +62,7 @@ public:
     ~SearchPluginManager() override;
 
     static SearchPluginManager *instance();
+    static void freeInstance();
 
     QStringList allPlugins() const;
     QStringList enabledPlugins() const;