Parse argv using QCommandLineParser

Fixes: #17

main.cpp

@@ -14,6 +14,7 @@
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
 #include <QApplication>
+#include <QCommandLineParser>
 #include <QFuture>
 #include <QFutureWatcher>
 #include <QtConcurrent/QtConcurrentRun>
@@ -32,7 +33,14 @@ int main(int argc, char *argv[])
 	QDir dir;
 	if(argc >= 2)
 	{
-		configDirectoryPath = QCoreApplication::arguments().at(1);
+		QCommandLineParser parser;
+		parser.addOptions({
+			{"new-instance", "Launch a new instance, ignoring any running ones"},
+			{"config", "Use supplied config dir instead of default"},
+		});
+		parser.addHelpOption();
+		parser.process(app.arguments());
+		configDirectoryPath = parser.value("config");
 		if(!dir.exists(configDirectoryPath))
 		{
 			QMessageBox::warning(nullptr, "Directory not found", configDirectoryPath + " was not found");
@@ -45,12 +53,12 @@ int main(int argc, char *argv[])
 	}
 	qRegisterMetaType<QVector<QString>>("QVector<QString>");
 
-
 	if(!dir.exists(configDirectoryPath))
 	{
 		if(!dir.mkdir(configDirectoryPath))
 		{
-			QMessageBox::warning(nullptr, "Failed to create dir", configDirectoryPath + " was not found and could not be created!");
+			QMessageBox::warning(nullptr, "Failed to create dir",
+								 configDirectoryPath + " was not found and could not be created!");
 			return 1;
 		}
 	}
@@ -91,10 +99,7 @@ int main(int argc, char *argv[])
 		});
 		w->showMaximized();
 		w->focusInput();
-
 	}
 
-
-
 	return app.exec();
 }