refactor: use flakes with deploy-rs & nixos-hardware

nixos/thinkman/backup.nix

@@ -0,0 +1,75 @@
+{ config, lib, pkgs, ... }:
+let
+  cfg = import ./vars-backup.nix;
+  borgbackupMonitor = { config, pkgs, lib, ... }: with lib; {
+    key = "borgbackupMonitor";
+    _file = "borgbackupMonitor";
+    config.systemd.services = {
+      "notify-problems@" = {
+        enable = true;
+        serviceConfig.User = "felix";
+        environment.SERVICE = "%i";
+        script = ''
+          export $(cat /proc/$(${pkgs.procps}/bin/pgrep -x "sway" -u "$USER")/environ |grep -z '^DBUS_SESSION_BUS_ADDRESS=')
+          ${pkgs.libnotify}/bin/notify-send -u critical "$SERVICE FAILED!" "Run journalctl -u $SERVICE for details"
+        '';
+      };
+    } // flip mapAttrs' config.services.borgbackup.jobs (name: value:
+      nameValuePair "borgbackup-job-${name}" {
+        unitConfig.OnFailure = "notify-problems@%i.service";
+      }
+    );
+  };
+
+in
+{
+  # notification
+  imports = [
+    borgbackupMonitor
+  ];
+
+  services.borgbackup.jobs.hetzner = {
+    paths = [
+      "/"
+    ];
+    exclude = [
+      "/nix"
+      "/sys"
+      "/run"
+      "/proc"
+      "/root/.cache/"
+      "**/.Trash"
+      "/tmp/*"
+      "/var/lock/*"
+      "/var/run/*"
+      "/var/tmp/*"
+      "/home/*/tmp"
+      "/home/*/todo"
+      "/home/*/.cache"
+      "/home/*/.gvfs"
+      "/home/*/.thumbnails"
+      "/home/*/.local/share/Trash"
+      "/srv/data/tmp"
+      "/srv/data/todo"
+    ];
+    extraCreateArgs = "--exclude-caches --keep-exclude-tags --stats";
+    encryption = {
+      mode = "repokey-blake2";
+      passCommand = "cat /root/.borg_password";
+    };
+    environment.BORG_RSH = "ssh -o 'StrictHostKeyChecking=no' -i /root/.ssh/backup_ed25519 -p 23";
+    repo = "${cfg.borg.user}@${cfg.borg.host}:${cfg.borg.dir}";
+    compression = "auto,zstd";
+    doInit = false;
+    startAt = "daily";
+    persistentTimer = true;
+    prune.keep = {
+      last = 1;
+      within = "3d";
+      daily = 7;
+      weekly = 4;
+      monthly = 6;
+      yearly = 2;
+    };
+  };
+}