revert timezoner attempts

flakes/common/nix_modules/timezone_auto.nix

@@ -1,34 +1,5 @@
-{ config, lib, pkgs, ... }:
+{ lib, pkgs, ... }:
-let
-  cfg = config.services.automatic-timezoned;
-  persistFile = if cfg.persistDir == null then null else "${cfg.persistDir}/timezone";
-  tzdata = pkgs.tzdata;
-in
 {
-  options.services.automatic-timezoned.persistDir = lib.mkOption {
-    type = lib.types.nullOr lib.types.str;
-    default = null;
-    description = ''
-      Absolute runtime directory used to persist the timezone for impermanence setups.
-
-      Important: this must be a normal filesystem path (a string like
-      "/persist/var/lib/timezone-persist"), not a Nix `path` value, otherwise it
-      can be coerced into a `/nix/store/...` path and become unwritable at runtime.
-
-      When set, the timezone is saved to this directory and restored on boot,
-      allowing offline boots to use the last known timezone.
-      Set to null to disable persistence (default).
-    '';
-  };
-
-  config = {
-    assertions = [
-      {
-        assertion = cfg.persistDir == null || lib.hasPrefix "/" cfg.persistDir;
-        message = "services.automatic-timezoned.persistDir must be an absolute path";
-      }
-    ];
-
   services.dbus.enable = lib.mkDefault true;
   services.geoclue2.enable = true;
 
@@ -36,10 +7,8 @@ in
   services.automatic-timezoned.enable = true;
 
   systemd.services.automatic-timezoned = {
-      after = [ "dbus.socket" "systemd-timedated.service" "geoclue.service" ]
+    after = [ "dbus.socket" "systemd-timedated.service" "geoclue.service" ];
-        ++ lib.optional (cfg.persistDir != null) "timezone-restore.service";
+    wants = [ "dbus.socket" "systemd-timedated.service" "geoclue.service" ];
-      wants = [ "dbus.socket" "systemd-timedated.service" "geoclue.service" ]
-        ++ lib.optional (cfg.persistDir != null) "timezone-restore.service";
     serviceConfig = {
       ExecStartPre = "${lib.getExe' pkgs.coreutils "sleep"} 5";
       Restart = "on-failure";
@@ -52,117 +21,6 @@ in
     wants = [ "dbus.socket" ];
   };
 
-    # Ensure anything using timedate1 sees restored timezone first.
-    systemd.services.systemd-timedated = lib.mkIf (cfg.persistDir != null) {
-      after = [ "timezone-restore.service" ];
-      wants = [ "timezone-restore.service" ];
-      requires = [ "timezone-restore.service" ];
-    };
-
-    # Restore timezone from persistent storage on boot (fallback for offline boots)
-    systemd.services.timezone-restore = lib.mkIf (cfg.persistDir != null) {
-      description = "Restore timezone from persistent storage";
-      wantedBy = [ "sysinit.target" ];
-
-      # NixOS activation may recreate /etc/localtime based on config.
-      # Run after activation so the restored timezone "wins" on offline boots.
-      after = [
-        "local-fs.target"
-        "systemd-remount-fs.service"
-        "nixos-activation.service"
-      ];
-      wants = [ "nixos-activation.service" ];
-
-      before = [
-        "time-sync.target"
-        "automatic-timezoned.service"
-        "systemd-timedated.service"
-      ];
-
-      serviceConfig = {
-        Type = "oneshot";
-        RemainAfterExit = true;
-        RequiresMountsFor = [ cfg.persistDir ];
-        ExecStart = pkgs.writeShellScript "timezone-restore" ''
-          set -euo pipefail
-          persist_file="${persistFile}"
-
-          if [ ! -f "$persist_file" ]; then
-            echo "No persisted timezone found, skipping restore"
-            exit 0
-          fi
-
-          tz=$(${pkgs.coreutils}/bin/cat "$persist_file")
-          if [ -z "$tz" ]; then
-            echo "Persisted timezone file is empty, skipping restore"
-            exit 0
-          fi
-
-          tzfile="${tzdata}/share/zoneinfo/$tz"
-          if [ ! -f "$tzfile" ]; then
-            echo "Invalid timezone '$tz' in persist file, skipping restore"
-            exit 0
-          fi
-
-          echo "Restoring timezone: $tz"
-          ${pkgs.coreutils}/bin/ln -sf "$tzfile" /etc/localtime
-
-          # Some NixOS setups may generate /etc/timezone as a symlink into the store.
-          # Replace it so we don't fail the whole restore.
-          ${pkgs.coreutils}/bin/rm -f /etc/timezone
-          ${pkgs.coreutils}/bin/printf '%s\n' "$tz" > /etc/timezone
-        '';
-      };
-    };
-
-    # Save timezone whenever it changes
-    systemd.services.timezone-persist = lib.mkIf (cfg.persistDir != null) {
-      description = "Persist timezone to storage";
-
-      serviceConfig = {
-        Type = "oneshot";
-        RequiresMountsFor = [ cfg.persistDir ];
-        ExecStart = pkgs.writeShellScript "timezone-persist" ''
-          set -euo pipefail
-          ${pkgs.coreutils}/bin/mkdir -p "${cfg.persistDir}"
-
-          # Try to read timezone from /etc/timezone first, fall back to parsing symlink
-          if [ -f /etc/timezone ]; then
-            tz=$(${pkgs.coreutils}/bin/cat /etc/timezone | ${pkgs.coreutils}/bin/tr -d '[:space:]')
-          else
-            target=$(${pkgs.coreutils}/bin/readlink /etc/localtime 2>/dev/null || true)
-            if [ -z "$target" ]; then
-              echo "Cannot determine timezone, skipping persist"
-              exit 0
-            fi
-            # Extract timezone name from path like /nix/store/.../share/zoneinfo/America/Chicago
-            tz=$(echo "$target" | ${pkgs.gnused}/bin/sed -n 's|.*/zoneinfo/||p')
-          fi
-
-          if [ -z "$tz" ]; then
-            echo "Cannot determine timezone, skipping persist"
-            exit 0
-          fi
-
-          persist_file="${persistFile}"
-
-          echo "Persisting timezone: $tz"
-          echo "$tz" > "$persist_file"
-        '';
-      };
-    };
-
-    # Watch /etc/localtime and /etc/timezone for changes and trigger persist
-    systemd.paths.timezone-persist = lib.mkIf (cfg.persistDir != null) {
-      description = "Watch timezone changes to persist";
-      wantedBy = [ "multi-user.target" ];
-
-      pathConfig = {
-        PathChanged = [ "/etc/localtime" "/etc/timezone" ];
-        Unit = "timezone-persist.service";
-      };
-    };
-
   systemd.services.fix-localtime-symlink = {
     description = "Fix /etc/localtime symlink to be absolute";
     wantedBy = [ "multi-user.target" ];
@@ -203,5 +61,4 @@ in
       Unit = "fix-localtime-symlink.service";
     };
   };
-  };
 }

hosts/juni/flake.nix

@@ -84,7 +84,6 @@
               inputs.common.nixosModules.hardening
               inputs.common.nixosModules.nix_options
               inputs.common.nixosModules.timezone_auto
-              ({ services.automatic-timezoned.persistDir = "/persist/var/lib/timezone-persist"; })
               inputs.common.nixosModules.tty_caps_esc
               inputs.common.nixosModules.zsh
               inputs.common.nixosModules.tailnet