added commit short hash to window title

mainwindow.cpp

@@ -54,7 +54,7 @@ MainWindow* mainWindow;
 
 QTimer autorecovery_timer;
 QString config_dir;
-QString appName = "Olive (December 2018 | Alpha)";
+QString appName;
 bool demoNoticeShown = false;
 
 void MainWindow::setup_layout(bool reset) {
@@ -96,6 +96,13 @@ void MainWindow::setup_layout(bool reset) {
 MainWindow::MainWindow(QWidget *parent) :
 	QMainWindow(parent)
 {
+	appName = "Olive (December 2018 | Alpha";
+#ifdef GITHASH
+	appName += " | ";
+	appName += GITHASH;
+#endif
+	appName += ")";
+
 	setup_debug();
 
 	mainWindow = this;

olive.pro

@@ -27,6 +27,11 @@ DEFINES += QT_DEPRECATED_WARNINGS
 # You can also select to disable deprecated APIs only up to a certain version of Qt.
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
+# Tries to get the current Git short hash
+system("which git") {
+    GITHASHVAR = $$system(git --git-dir $$PWD/.git --work-tree $$PWD log -1 --format=%h)
+    DEFINES += GITHASH=\\"\"$$GITHASHVAR\\"\"
+}
 
 SOURCES += \
         main.cpp \