Add borgmatic for automatic backups

home/borgmatic.nix

@@ -0,0 +1,63 @@
+{ hostname
+, username
+, pkgs
+, ...
+}: {
+  home.packages = with pkgs; [
+    libnotify
+  ];
+
+  programs.borgmatic = {
+    enable = true;
+    package = pkgs.borgmatic;
+
+    backups.default = {
+      location = {
+        repositories = [
+          {
+            label = "duke";
+            path = "ssh://borg@duke.veltnet:2222/home/borg/backups/${hostname}-${username}";
+          }
+        ];
+        excludeHomeManagerSymlinks = true;
+        patterns = [
+          #TODO: home.homeDirectory might be usable here
+          "R /home/${username}/Documents"
+          "R /home/${username}/.ssh"
+          "- /home/${username}/Documents/SteamLibrary"
+          "- /home/${username}/Documents/PrismLauncher instances"
+          "- /home/${username}/Documents/.Trash-1000"
+          "- /home/${username}/Documents/VMs/Data"
+          "- **/node_modules"
+          "- **/.git"
+          "- **/.cache"
+          "- **/*build"
+          "- **/target"
+          "- **/.venv"
+          "- **/venv"
+          "- **/.gradle"
+          "- **/out"
+          "- **/dist"
+          "- **/.pio"
+        ];
+      };
+      retention.keepWeekly = 2;
+      storage.extraConfig.ssh_command = "ssh -i /home/${username}/.ssh/id_ed25519_borg";
+      #FIXME: consistency checks!!!
+    };
+  };
+
+  systemd.user.services.borgmatic = {
+    Unit.Description = "Create a backup using borgmatic";
+    Service.ExecStart = "${pkgs.borgmatic}/bin/borgmatic create --stats";
+  };
+
+  systemd.user.timers.borgmatic = {
+    Unit.Description = "Create weekly backups using borgmatic";
+    Timer = {
+      OnCalendar = "Weekly";
+      Persistent = true;
+    };
+    Install.WantedBy = [ "timers.target" ];
+  };
+}

home/home.nix

@@ -9,6 +9,7 @@ top @ { config
     inputs.catppuccin.homeModules.catppuccin
     inputs.spicetify-nix.homeManagerModules.default
     ./nixvim
+    ./borgmatic.nix
   ];
 
   #NOTE: MUST be kept up to date with nixpkgs!