fish: Add tadaping function

home-manager/modules/fish/functions.nix

@@ -102,4 +102,15 @@
       end
     '';
   };
+
+  tadaping = {
+    body = ''
+      while not ${pkgs.iputils}/bin/ping -c 1 $host > /dev/null 2>&1
+        sleep 1
+      end
+      ${pkgs.mpv}/bin/mpv --really-quiet ${./tada.m4a}
+    '';
+    argumentNames = "host";
+    description = "Ping a host until it responds, then play a sound.";
+  };
 }