- fix spew from QDir when not using a config file

.gitignore

@@ -3,3 +3,4 @@ make
 .git
 build
 .vscode
+test_config/slide.options.json

src/appconfig.cpp

@@ -49,6 +49,11 @@ void SetJSONBool(bool &value, QJsonObject jsonDoc, const char *key) {
 }
 
 Config loadConfiguration(const std::string &configFilePath, const Config &currentConfig) {
+  if(configFilePath.empty())
+  {
+    return currentConfig;
+  }
+
   QString jsonFile(configFilePath.c_str());
   QDir directory;
   if(!directory.exists(jsonFile))
@@ -218,6 +223,11 @@ QVector<PathEntry> parsePathEntry(QJsonObject &jsonMainDoc, bool baseRecursive,
 }
 
 AppConfig loadAppConfiguration(const AppConfig &commandLineConfig) {
+  if(commandLineConfig.configPath.empty())
+  {
+    return commandLineConfig;
+  }
+
   QString jsonFile = getAppConfigFilePath(commandLineConfig.configPath);
   QDir directory;
   if(!directory.exists(jsonFile))
@@ -272,6 +282,10 @@ AppConfig loadAppConfiguration(const AppConfig &commandLineConfig) {
 }
 
 Config getConfigurationForFolder(const std::string &folderPath, const Config &currentConfig) {
+  if(folderPath.empty())
+  {
+    return currentConfig;
+  }
   QDir directory(folderPath.c_str());
   QString jsonFile = directory.filePath(QString("options.json"));
   if(directory.exists(jsonFile))

src/main.cpp

@@ -210,6 +210,11 @@ std::unique_ptr<ImageSelector> GetSelectorForApp(const AppConfig& appConfig)
 
 void ReloadConfigIfNeeded(AppConfig &appConfig, MainWindow &w, ImageSwitcher *switcher)
 {  
+  if(appConfig.configPath.empty())
+  {
+    return;
+  }
+  
   QString jsonFile = getAppConfigFilePath(appConfig.configPath);
   QDir directory;
   if(!directory.exists(jsonFile))