wallpaper-changer systemd service

home/sam/common/optional/desktop/wallpaper-changer/swww-wallpaper-changer/default.nix

@@ -1,15 +1,53 @@
-{ pkgs, ... }:
-let
-  scripts = {
-    swww-wallpaper-changer = pkgs.writeShellApplication {
-      name = "swww-wallpaper-changer";
-      text = builtins.readFile ./swww-wallpaper-changer.sh;
+{
+  pkgs,
+  ...
+}:
+{
+  systemd.user.services.wallpaper-changer = {
+    Unit = {
+      Description = "Script to change wallpaper using swww";
+       After = [ "graphical-session.target" ]; # or "wayland.target", depending on your system setup
+       #After = [ "hyprland-session.target" ];
+    };
+    Install = {
+      WantedBy = [ "default.target" ];
+    };
+    Service = {
+      Restart = "on-failure";  # This will make the service restart on failure
+      ExecStart=  "${pkgs.writeShellScript "swww-daemon" ''
+                   ${pkgs.swww}/bin/swww-daemon
+                   ''}";
+      ExecStartPost = "${pkgs.writeShellScript "swww-wallpaper-changer" ''
+        #!/run/current-system/sw/bin/bash
+        export WAYLAND_DISPLAY="wayland-1"
+        set +o errexit
+        set +o nounset
+        set +o pipefail
+        script_name=''${BASH_SOURCE[0]}
+        for pid in $(pidof -x "$script_name"); do
+            if [ "$pid" != $$ ]; then
+                kill -15 "$pid"
+            fi 
+        done
+        
+        #[ "$XDG_SESSION_TYPE" != "wayland" ] && echo "Not a Wayland session, exiting." && exit 1
+        wallpaper_dir="$HOME/.local/share/bg/"
+        
+        swww_daemon_pid=$(pidof -x 'swww-daemon')
+        swww_pid=$(pidof -x 'swww')
+        
+        #[ -z "$swww_daemon_pid" ] || kill -15 "$swww_daemon_pid"
+        [ -z "$swww_pid" ] || kill -15 "$swww_pid"
+        #${pkgs.swww}/bin/swww-daemon &
+        
+        while true; do
+            find "$wallpaper_dir" -type f -follow \( -iname \*.jpg -o -iname \*.png -o -iname \*.gif -o -iname \*.bmp \) | shuf | while read -r file; do
+                ${pkgs.swww}/bin/swww img "$file" --transition-step 10 --transition-fps 60
+                [ $? != 0 ] && echo "swww failed. Exiting" && exit 1
+                sleep 3
+            done
+        done
+      ''}";
     };
   };
-in
-{
-  home.packages = builtins.attrValues {
-    inherit (scripts)
-      swww-wallpaper-changer;
-  };
 }

hosts/nixdev/default.nix

@@ -70,7 +70,7 @@
 #    sddm
 #    sshfs-fuse
 #    wdisplays
-    wallpaper_changer
+    #wallpaper_changer
 #    #(callPackage ../../nixos_modules/themes/sddm-sugar-candy.nix{}).sddm-sugar-candy-theme
 #    libsForQt5.qt5.qtgraphicaleffects #required for sugar candy
 #    #(import ../../nixos_modules/scripts/wallpaper_changer.nix { inherit pkgs; })

result

@@ -1 +0,0 @@
-/nix/store/iil5ayx17m3dn8jqrrv5y48prrcxb7d8-sddm-sugar-candy-theme-1.6