move restic to nixosModules

modules/nixos/restic.nix

@@ -0,0 +1,48 @@
+{ config, pkgs, lib, ... }:
+let
+  cfg = config.custom.restic;
+in
+{
+  options = {
+    custom.restic = {
+      enable = lib.mkEnableOption "restic";
+      repositoryFile = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+      };
+      passwordFile = lib.mkOption {
+        type = lib.types.str;
+        default = "";
+      };
+    };
+  };
+  config = {
+    services.restic.backups = lib.mkIf cfg.enable {
+      remotebackup = {
+        repositoryFile = cfg.repositoryFile;
+        passwordFile = cfg.passwordFile;
+        paths = [
+          "/home"
+          "/var/lib"
+        ];
+        exclude = [
+          "/home/*/.cache"
+          "/home/*/.cargo"
+          "/home/*/.local/share/Steam"
+          "/home/*/.local/share/flatpak"
+        ];
+        timerConfig = {
+          OnCalendar = "00:05";
+          RandomizedDelaySec = "5h";
+        };
+        pruneOpts = [
+          "--keep-daily 7"
+          "--keep-weekly 5"
+          "--keep-monthly 12"
+          "--keep-yearly 75"
+        ];
+      };
+    };
+  };
+}
+