treewide: use graphical-session.target for GUI services

As per systemd.special(7)[0] graphical-session-pre.target is strictly
for units that set up things for a graphical session. Most notably,
these are usually started *before* the compositor/session is actually
ready.

While Home Manager's current implementation of graphical-session.target
allows these units to work regardless of what systemd.special(7)
specifies, other setups like ones with uwsm[1] do not allow these units
to start properly.

[0]: https://www.freedesktop.org/software/systemd/man/latest/systemd.special.html#graphical-session-pre.target
[1]: https://github.com/Vladimir-csp/uwsm

Signed-off-by: Sefa Eyeoglu <[email protected]>

Author: Scrumplex

modules/programs/waybar.nix

@@ -309,7 +309,7 @@ in {
             "Highly customizable Wayland bar for Sway and Wlroots based compositors.";
           Documentation = "https://github.com/Alexays/Waybar/wiki";
           PartOf = [ "graphical-session.target" ];
-          After = [ "graphical-session-pre.target" ];
+          After = [ "graphical-session.target" ];
         };
 
         Service = {

modules/services/blueman-applet.nix

@@ -30,7 +30,7 @@ with lib;
       Unit = {
         Description = "Blueman applet";
         Requires = [ "tray.target" ];
-        After = [ "graphical-session-pre.target" "tray.target" ];
+        After = [ "graphical-session.target" "tray.target" ];
         PartOf = [ "graphical-session.target" ];
       };
 

modules/services/network-manager-applet.nix

@@ -28,7 +28,7 @@ in {
       Unit = {
         Description = "Network Manager applet";
         Requires = [ "tray.target" ];
-        After = [ "graphical-session-pre.target" "tray.target" ];
+        After = [ "graphical-session.target" "tray.target" ];
         PartOf = [ "graphical-session.target" ];
       };
 

modules/services/poweralertd.nix

@@ -20,7 +20,7 @@ in {
       Unit = {
         Description = "UPower-powered power alerter";
         Documentation = "man:poweralertd(1)";
-        After = [ "graphical-session-pre.target" ];
+        After = [ "graphical-session.target" ];
         PartOf = [ "graphical-session.target" ];
       };
 

modules/services/wlsunset.nix

@@ -128,6 +128,7 @@ in {
     systemd.user.services.wlsunset = {
       Unit = {
         Description = "Day/night gamma adjustments for Wayland compositors.";
+        After = [ "graphical-session.target" ];
         PartOf = [ "graphical-session.target" ];
       };