Musicbrainz search indexes update service

hosts/musicbrainz/default.nix

@@ -1,4 +1,4 @@
-{
+{pkgs, ...}: {
   fileSystems."/" = {
     device = "/dev/disk/by-uuid/5d71cc16-f1ee-4b87-87b2-00fdf98442bd";
     fsType = "ext4";
@@ -12,4 +12,26 @@
   swapDevices = [
     {device = "/dev/disk/by-uuid/1402e27f-861f-4ecd-8b46-a29461ec3eeb";}
   ];
+
+  # Update Musicbrainz search indexes once a week.
+  systemd.timers."musicbrainz-update-indexes" = {
+    wantedBy = ["timers.target"];
+    timerConfig = {
+      OnCalendar = "weekly";
+      Persistent = true;
+      Unit = "musicbrainz-update-indexes.service";
+    };
+  };
+
+  systemd.services."musicbrainz-update-indexes" = {
+    script = ''
+      set -eu
+      cd /home/fern/docker/stacks/musicbrainz
+      ${pkgs.docker}/bin/docker compose exec -T indexer python -m sir reindex --entity-type artist --entity-type release
+    '';
+    serviceConfig = {
+      Type = "oneshot";
+      User = "fern";
+    };
+  };
 }