treewide: dedup btrfs auto scrub configuration

flake/nixos.nix

@@ -18,6 +18,7 @@ let
         programs.tools.common
         security.polkit
         security.sudo
+        services.btrfs-auto-scrub
         services.dbus
         services.journald
         services.openssh

nixos/hosts/flandre-m5p/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/kanako-hkg0/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/marisa-7d76/disko-fs.nix

@@ -1,12 +1,7 @@
+{ ... }:
 {
   environment.globalPersistence = {
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/marisa-a7s/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/reisen-fra0/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/reisen-nrt0/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/reisen-sea0/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/reisen-sin0/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/hosts/suwako-vie0/disko-fs.nix

@@ -3,10 +3,4 @@
     enable = true;
     root = "/persist";
   };
-
-  services.btrfs.autoScrub = {
-    enable = true;
-    interval = "weekly";
-    fileSystems = [ "/persist" ];
-  };
 }

nixos/profiles/services/btrfs-auto-scrub/default.nix

@@ -0,0 +1,14 @@
+{ config, lib, ... }:
+let
+  btrfsDevices = lib.unique (
+    lib.mapAttrsToList (_name: value: value.device) (
+      lib.filterAttrs (_name: value: value.fsType == "btrfs") config.fileSystems
+    )
+  );
+in
+{
+  services.btrfs.autoScrub = {
+    enable = btrfsDevices != [ ];
+    fileSystems = btrfsDevices;
+  };
+}