service/upower: start upower dbus service if inactive

src/dbus/bus.hpp

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <functional>
+
+#include <qcontainerfwd.h>
+#include <qdbusconnection.h>
+#include <qobject.h>
+
+namespace qs::dbus {
+
+void tryLaunchService(
+    QObject* parent,
+    QDBusConnection& connection,
+    const QString& serviceName,
+    const std::function<void(bool)>& callback
+);
+
+}