enable low battery level notifications

home/overlays/bat-lvl/default.nix

@@ -0,0 +1,5 @@
+self: super:
+
+{
+  bat-lvl = self.callPackage ../../scripts/battery-level.nix { };
+}

home/programs/xmonad/default.nix

@@ -15,6 +15,7 @@ let
     ${pkgs.pasystray}/bin/pasystray &
     ${pkgs.blueman}/bin/blueman-applet &
     ${pkgs.networkmanagerapplet}/bin/nm-applet --sm-disable --indicator &
+    ${pkgs.bat-lvl}/bin/battery-level-check &
     megasync &
   '';
 in

home/scripts/battery-level.nix

@@ -0,0 +1,26 @@
+{ acpi, libnotify, writeShellScriptBin }:
+
+let
+  xacpi = "${acpi}/bin/acpi";
+  notify = "${libnotify}/bin/notify-send";
+in
+writeShellScriptBin "battery-level-check" ''
+  check_battery_level() {
+    PERCENT=`${xacpi} | cut -d , -f2`
+    PERCENT=''${PERCENT%\%}
+    STATUS=`${xacpi} -a`
+
+    if [[ $PERCENT -lt 10 && $STATUS == *"off-line"* ]]; then
+      ${notify} --urgency=critical 'Low battery!' "$PERCENT% left"
+    fi
+  }
+
+  sleep_pid=0
+
+  while true; do
+    check_battery_level
+    sleep 60 &
+    sleep_pid=$!
+    wait
+  done
+''

home/services/dunst/default.nix

@@ -67,8 +67,8 @@ in
         timeout = 4;
       };
       urgency_critical = {
-        background = "#${base0A}";
-        foreground = "#${base0D}";
+        background = "#${base00}";
+        foreground = "#${base05}";
         frame_color = "#${base08}";
         timeout = 10;
       };

outputs/home-conf.nix

@@ -41,6 +41,7 @@ let
       neovim-flake.overlays.${system}.default
       statix.overlays.default
       sxmOverlay
+      (import ../home/overlays/bat-lvl)
       (import ../home/overlays/nautilus)
       (import ../home/overlays/ranger)
     ];