hyprsunset: Update module to use hyprsunset.conf

Updates the hyprsunset module so that it creates the hyprsunset.conf file introduced in v0.3.0

This allows hyprsunset to manange the transition timings instead of defining extra systemd services/timers

See https://wiki.hypr.land/Hypr-Ecosystem/hyprsunset/#configuration

Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

modules/services/hyprsunset.nix

@@ -22,7 +22,7 @@ in
       default = [ ];
       description = "Additional command-line arguments to pass to `hyprsunset`.";
       example = [
-        "--identity"
+        "--verbose"
       ];
     };
 
@@ -69,89 +69,166 @@ in
         }
       '';
     };
+
+    settings = lib.mkOption {
+      type =
+        with lib.types;
+        let
+          valueType =
+            nullOr (oneOf [
+              bool
+              int
+              float
+              str
+              path
+              (attrsOf valueType)
+              (listOf valueType)
+            ])
+            // {
+              description = "Hyprsunset configuration value";
+            };
+        in
+        valueType;
+      default = { };
+      description = ''
+        Hyprsunset configuration written in Nix. Entries with the same key
+        should be written as lists. Variables' and colors' names should be
+        quoted. See <https://wiki.hypr.land/Hypr-Ecosystem/hyprsunset/> for more examples.
+      '';
+      example = lib.literalExpression ''
+        {
+          max-gamma = 150;
+
+          profile = [
+            {
+              time = "7:30";
+              identity = true;
+            }
+            {
+              time = "21:00";
+              temperature = 5000;
+              gamma = 0.8;
+            }
+          ];
+        };
+      '';
+    };
+
+    importantPrefixes = lib.mkOption {
+      type = with lib.types; listOf str;
+      default = [ "$" ];
+      example = [ "$" ];
+      description = ''
+        List of prefix of attributes to source at the top of the config.
+      '';
+    };
+
+    systemdTarget = lib.mkOption {
+      type = lib.types.str;
+      default = config.wayland.systemd.target;
+      defaultText = lib.literalExpression "config.wayland.systemd.target";
+      example = "hyprland-session.target";
+      description = "Systemd target to bind to.";
+    };
   };
 
   config = lib.mkIf cfg.enable {
     assertions = [
       {
-        assertion = (config.wayland.windowManager.hyprland.package != null);
+        assertion = (config.wayland.windowManager.hyprland.package != null || cfg.transitions == { });
         message = ''
-          Can't set services.hyprsunset.enable if wayland.windowManager.hyprland.package
+          Can't set services.hyprsunset.enable when using the deprecated option
-          is set to null. If you are using Hyprland's upstream flake, see:
+          services.hyprsunset.transitions if wayland.windowManager.hyprland.package
+          is set to null. Either migrate your configuration to use services.hyprsunset.settings
+          or, if you are using Hyprland's upstream flake, see:
           <https://github.com/nix-community/home-manager/issues/7484>.
         '';
       }
     ];
 
-    systemd.user = lib.mkIf (config.wayland.windowManager.hyprland.package != null) (
-      let
-        # Create the main persistent service that maintains the IPC socket
-        # Create a service for each transition in the transitions configuration
-        # These services will send requests to the persistent service via IPC
-        transitionServices = lib.mapAttrs' (
-          name: transitionCfg:
-          lib.nameValuePair "hyprsunset-${name}" {
-            Install = { };
 
-            Unit = {
+    xdg.configFile."hypr/hyprsunset.conf" = lib.mkIf (cfg.settings != { }) {
-              ConditionEnvironment = "WAYLAND_DISPLAY";
+      text = lib.hm.generators.toHyprconf {
-              Description = "hyprsunset transition for ${name}";
+        attrs = cfg.settings;
-              After = [ "hyprsunset.service" ];
+        inherit (cfg) importantPrefixes;
-              Requires = [ "hyprsunset.service" ];
+      };
-            };
+    };
 
-            Service = {
+    systemd.user =
-              Type = "oneshot";
+      lib.mkIf (config.wayland.windowManager.hyprland.package != null || cfg.transitions == { })
-              # Execute multiple requests sequentially
+        (
-              ExecStart = lib.concatMapStringsSep " && " (
+          let
-                cmd:
+            # Handle deprecated transitions option
-                "${lib.getExe' config.wayland.windowManager.hyprland.package "hyprctl"} hyprsunset ${lib.escapeShellArgs cmd}"
+            # If this is unused, no additional services will be created as transitions will be empty
-              ) transitionCfg.requests;
+            # Create a service for each transition in the transitions configuration
-            };
+            # These services will send requests to the persistent service via IPC
+            transitionServices = lib.mapAttrs' (
+              name: transitionCfg:
+              lib.nameValuePair "hyprsunset-${name}" {
+                Install = { };
+
+                Unit = {
+                  ConditionEnvironment = "WAYLAND_DISPLAY";
+                  Description = "hyprsunset transition for ${name}";
+                  After = [ "hyprsunset.service" ];
+                  Requires = [ "hyprsunset.service" ];
+                };
+
+                Service = {
+                  Type = "oneshot";
+                  # Execute multiple requests sequentially
+                  ExecStart = lib.concatMapStringsSep " && " (
+                    cmd:
+                    "${lib.getExe' config.wayland.windowManager.hyprland.package "hyprctl"} hyprsunset ${lib.escapeShellArgs cmd}"
+                  ) transitionCfg.requests;
+                };
+              }
+            ) cfg.transitions;
+          in
+          {
+            services = {
+              hyprsunset = {
+                Install = {
+                  WantedBy = [ cfg.systemdTarget ];
+                };
+
+                Unit = {
+                  ConditionEnvironment = "WAYLAND_DISPLAY";
+                  Description = "hyprsunset - Hyprland's blue-light filter";
+                  After = [ config.wayland.systemd.target ];
+                  PartOf = [ config.wayland.systemd.target ];
+                  X-Restart-Triggers = lib.mkIf (cfg.settings != { }) [
+                    "${config.xdg.configFile."hypr/hyprsunset.conf".source}"
+                  ];
+                };
+
+                Service = {
+                  ExecStart = "${lib.getExe cfg.package} ${lib.escapeShellArgs cfg.extraArgs}";
+                  Restart = "always";
+                  RestartSec = "10";
+                };
+              };
+            }
+            // transitionServices;
+
+            timers = lib.mapAttrs' (
+              name: transitionCfg:
+              lib.nameValuePair "hyprsunset-${name}" {
+                Install = {
+                  WantedBy = [ config.wayland.systemd.target ];
+                };
+
+                Unit = {
+                  Description = "Timer for hyprsunset transition (${name})";
+                };
+
+                Timer = {
+                  OnCalendar = transitionCfg.calendar;
+                  Persistent = true;
+                };
+              }
+            ) cfg.transitions;
           }
-        ) cfg.transitions;
+        );
-      in
-      {
-        services = {
-          hyprsunset = {
-            Install = {
-              WantedBy = [ config.wayland.systemd.target ];
-            };
-
-            Unit = {
-              ConditionEnvironment = "WAYLAND_DISPLAY";
-              Description = "hyprsunset - Hyprland's blue-light filter";
-              After = [ config.wayland.systemd.target ];
-              PartOf = [ config.wayland.systemd.target ];
-            };
-
-            Service = {
-              ExecStart = "${lib.getExe cfg.package} ${lib.escapeShellArgs cfg.extraArgs}";
-              Restart = "always";
-              RestartSec = "10";
-            };
-          };
-        }
-        // transitionServices;
-
-        timers = lib.mapAttrs' (
-          name: transitionCfg:
-          lib.nameValuePair "hyprsunset-${name}" {
-            Install = {
-              WantedBy = [ config.wayland.systemd.target ];
-            };
-
-            Unit = {
-              Description = "Timer for hyprsunset transition (${name})";
-            };
-
-            Timer = {
-              OnCalendar = transitionCfg.calendar;
-              Persistent = true;
-            };
-          }
-        ) cfg.transitions;
-      }
-    );
   };
 }