nixos/docuum: add missing options

nixos/modules/services/admin/docuum.nix

@@ -2,7 +2,7 @@
 
 let
   cfg = config.services.docuum;
-  inherit (lib) mkIf mkEnableOption mkOption getExe types;
+  inherit (lib) mkIf mkEnableOption mkOption getExe types optionals concatMap;
 in
 {
   options.services.docuum = {
@@ -14,6 +14,27 @@ in
       default = "10 GB";
       example = "50%";
     };
+
+    minAge = mkOption {
+      description = "Sets the minimum age of images to be considered for deletion.";
+      type = types.nullOr types.str;
+      default = null;
+      example = "1d";
+    };
+
+    keep = mkOption {
+      description = "Prevents deletion of images for which repository:tag matches the specified regex.";
+      type = types.listOf types.str;
+      default = [];
+      example = [ "^my-image" ];
+    };
+
+    deletionChunkSize = mkOption {
+      description = "Removes specified quantity of images at a time.";
+      type = types.int;
+      default = 1;
+      example = 10;
+    };
   };
 
   config = mkIf cfg.enable {
@@ -35,10 +56,13 @@ in
         DynamicUser = true;
         StateDirectory = "docuum";
         SupplementaryGroups = [ "docker" ];
-        ExecStart = utils.escapeSystemdExecArgs [
+        ExecStart = utils.escapeSystemdExecArgs ([
           (getExe pkgs.docuum)
           "--threshold" cfg.threshold
-        ];
+          "--deletion-chunk-size" cfg.deletionChunkSize
+        ] ++ (concatMap (keep: [ "--keep" keep ]) cfg.keep)
+          ++ (optionals (cfg.minAge != null) [ "--min-age" cfg.minAge ])
+        );
       };
     };
   };