From 1af2f7506a31b05495d8b892fa1946cc9b959339 Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Fri, 6 Dec 2024 10:59:19 +0100
Subject: [PATCH] nixos/nix-optimise: add randomizedDelaySec and persistent
 options

This brings the options for nix-optimise more in line with those
for nix-gc
---
 nixos/modules/services/misc/nix-optimise.nix | 32 ++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

diff --git a/nixos/modules/services/misc/nix-optimise.nix b/nixos/modules/services/misc/nix-optimise.nix
index ed33f6746a4e..f3724a5a78cf 100644
--- a/nixos/modules/services/misc/nix-optimise.nix
+++ b/nixos/modules/services/misc/nix-optimise.nix
@@ -22,6 +22,34 @@ in
           which the optimiser will run.
         '';
       };
+
+      randomizedDelaySec = lib.mkOption {
+        default = "1800";
+        type = lib.types.singleLineStr;
+        example = "45min";
+        description = ''
+          Add a randomized delay before the optimizer will run.
+          The delay will be chosen between zero and this value.
+          This value must be a time span in the format specified by
+          {manpage}`systemd.time(7)`
+        '';
+      };
+
+      persistent = lib.mkOption {
+        default = true;
+        type = lib.types.bool;
+        example = false;
+        description = ''
+          Takes a boolean argument. If true, the time when the service
+          unit was last triggered is stored on disk. When the timer is
+          activated, the service unit is triggered immediately if it
+          would have been triggered at least once during the time when
+          the timer was inactive. Such triggering is nonetheless
+          subject to the delay imposed by RandomizedDelaySec=. This is
+          useful to catch up on missed runs of the service when the
+          system was powered down.
+        '';
+      };
     };
   };
 
@@ -44,8 +72,8 @@ in
 
       timers.nix-optimise = lib.mkIf cfg.automatic {
         timerConfig = {
-          Persistent = true;
-          RandomizedDelaySec = 1800;
+          RandomizedDelaySec = cfg.randomizedDelaySec;
+          Persistent = cfg.persistent;
         };
       };
     };