conditional motd in the motd config

hosts/nixos/lumiose/configuration.nix

@@ -19,7 +19,7 @@
     ../../../modules/homelab
     #../../../modules/gameservers/srcds
     ../../../modules/gameservers/minecraft_recpro
-    #../../../modules/gameservers/minecraft_modded
+    ../../../modules/gameservers/minecraft_modded
   ];
 
   home-manager.users.blake.imports = [
@@ -84,7 +84,7 @@
 
   gameservers = {
     minecraft_recpro.enable = true;
-    #minecraft_modded.enable = false;
+    minecraft_modded.enable = false;
   };
 
   # boot (systemd is going on me)

modules/gameservers/minecraft_recpro/default.nix

@@ -49,9 +49,9 @@ in {
       default = false;
       description = "enable backups for ${service}";
     };
-    motd = lib.mkOption {
-      type = lib.types.nullOr lib.types.str;
-      default = "velocity";
+    motd_gs = lib.mkOption {
+      type = lib.types.nullOr (lib.types.listOf lib.types.str);
+      default = ["velocity" "smp" "superflat" "bento"];
     };
     backup_repo = lib.mkOption {
       type = lib.types.path;

modules/homelab/system/motd/default.nix

@@ -10,7 +10,24 @@
   # collect services to display
   motd_list =
     mapAttrsToList (_: v: v.motd)
-    (filterAttrs (_: v: v ? motd && v.motd != null) config.homelab);
+    (filterAttrs (
+        _: v:
+          (v.enable or false)
+          && v ? motd
+          && v.motd != null
+      )
+      config.homelab);
+
+  motd_gs_list = lib.concatLists (
+    mapAttrsToList (_: v: v.motd_gs)
+    (filterAttrs (
+        _: v:
+          (v.enable or false)
+          && v ? motd_gs
+          && v.motd_gs != null
+      )
+      config.gameservers)
+  );
 in {
   options.homelab.motd = {
     enable = mkOption {
@@ -78,15 +95,16 @@ in {
 
       # --- gameservers ---
       echo -e "''${headings}gameservers:''${reset}"
-        for service in velocity smp superflat bento; do
-          status=$(systemctl is-active $service 2>/dev/null)
+      ${lib.concatStringsSep "\n" (map (service: ''
+          status=$(systemctl is-active ${service} 2>/dev/null)
+
           if [ "$status" = "active" ]; then
-              printf "%-32s%s\n" "  ''${active}[$service]''${reset}" "running"
+              printf "%-32s%s\n" "  ''${active}[${service}]''${reset}" "running"
           else
-              printf "%-32s%s\n" "  ''${active}[$service]''${reset}" "not running"
+              printf "%-32s%s\n" "  ''${active}[${service}]''${reset}" "not running"
           fi
-        done
-      echo
+        '')
+        motd_gs_list)}
     '';
 
     environment.etc."motd".mode = "0755";