flameshot: add darwin support

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

modules/services/flameshot.nix

@@ -39,10 +39,6 @@ in
   };
 
   config = lib.mkIf cfg.enable {
-    assertions = [
-      (lib.hm.assertions.assertPlatform "services.flameshot" pkgs lib.platforms.linux)
-    ];
-
     home.packages = [ cfg.package ];
 
     xdg.configFile = lib.mkIf (cfg.settings != { }) {
@@ -67,7 +63,7 @@ in
 
       Service = {
         Environment = [ "PATH=${config.home.profileDirectory}/bin" ];
-        ExecStart = "${cfg.package}/bin/flameshot";
+        ExecStart = lib.getExe cfg.package;
         Restart = "on-abort";
 
         # Sandboxing.
@@ -80,5 +76,18 @@ in
         SystemCallFilter = "@system-service";
       };
     };
+
+    launchd.agents.flameshot = {
+      enable = true;
+      config = {
+        ProgramArguments = [ (lib.getExe cfg.package) ];
+        KeepAlive = {
+          Crashed = true;
+          SuccessfulExit = false;
+        };
+        ProcessType = "Interactive";
+        RunAtLoad = true;
+      };
+    };
   };
 }