be.lt: show battery level in tmux

hosts/be.lt.ts.hillion.co.uk/default.nix

@@ -15,6 +15,7 @@
     boot.loader.efi.canTouchEfiVariables = true;
 
     custom.defaults = true;
+    custom.laptop = true;
 
     ## Impermanence
     custom.impermanence = {

modules/default.nix

@@ -11,6 +11,7 @@
     ./hostinfo.nix
     ./ids.nix
     ./impermanence.nix
+    ./laptop.nix
     ./locations.nix
     ./resilio.nix
     ./services/default.nix

modules/home/tmux/default.nix

@@ -11,7 +11,14 @@ in
   config = lib.mkIf cfg.enable {
     home-manager.users.jake.programs.tmux = {
       enable = true;
-      extraConfig = lib.readFile ./.tmux.conf;
+
+      extraConfig = lib.strings.concatLines [
+        (lib.readFile ./.tmux.conf)
+
+        ''set -g status-right "${lib.strings.optionalString config.custom.laptop "#{battery_icon} #{battery_percentage} #{battery_remain} | "}\"#{=21:pane_title}\" %H:%M %d-%b-%y"''
+      ];
+
+      plugins = with pkgs; lib.lists.optional config.custom.laptop tmuxPlugins.battery;
     };
   };
 }

modules/laptop.nix

@@ -0,0 +1,5 @@
+{ pkgs, lib, config, ... }:
+
+{
+  options.custom.laptop = lib.mkEnableOption "laptop";
+}