add systemd support (#1253)

* add systemd support
motivation for this is is proper ordering of related/bound/required
services to Hyprland (e.g. swaybg) that would need to have a compositor
ready.

this could possibly be a build-time option of course.

see also:
example/ files for example of services

Signed-off-by: Paymon MARANDI <darwinskernel@gmail.com>

* nix: add withSystemd flag

Signed-off-by: Paymon MARANDI <darwinskernel@gmail.com>
Co-authored-by: Mihai Fufezan <fufexan@protonmail.com>
Co-authored-by: Vaxerski <vaxry@vaxry.net>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/Compositor.cpp b/src/Compositor.cpp
index 2c9ad503..b60d70d7 100644
--- a/src/Compositor.cpp
+++ b/src/Compositor.cpp
@@ -2,6 +2,9 @@
 #include "helpers/Splashes.hpp"
 #include <random>
 #include "debug/HyprCtl.hpp"
+#ifdef USES_SYSTEMD
+#include <systemd/sd-daemon.h> // for sd_notify
+#endif
 
 int handleCritSignal(int signo, void* data) {
     Debug::log(LOG, "Hyprland received signal %d", signo);
@@ -384,6 +387,15 @@ void CCompositor::startCompositor() {
 
     wlr_xcursor_manager_set_cursor_image(m_sWLRXCursorMgr, "left_ptr", m_sWLRCursor);
 
+#ifdef USES_SYSTEMD
+    if (sd_booted() > 0)
+        // tell systemd that we are ready so it can start other bond, following, related units
+        sd_notify(0, "READY=1");
+   else
+        Debug::log(LOG, "systemd integration is baked in but system itself is not booted à la systemd!");
+#endif
+
+
     // This blocks until we are done.
     Debug::log(LOG, "Hyprland is ready, running the event loop!");
     wl_display_run(m_sWLDisplay);