battery warning

home/rachel.nix

@@ -534,4 +534,51 @@ in rec {
       enable = true;
     };
   };
+
+  systemd.user= {
+    timers = {
+      battery-check = {
+        Unit.Description = "Warn at low battery levels";
+        Timer = {
+          OnBootSec = "1min";
+          OnUnitActiveSec = "30s";
+          Unit = "battery-check.service";
+        };
+      };
+    };
+    services = {
+      battery-check = {
+        Unit.Description = "Warn at low battery levels";
+        Service = let batMon = pkgs.writeShellScript "botMon" ''
+          PATH="$PATH:${pkgs.lib.makeBinPath [
+            pkgs.acpi
+            pkgs.dunst
+            pkgs.gnugrep
+            pkgs.gawk
+            pkgs.systemd
+          ]}"
+          acpi -b | grep "Battery 0" | awk -F'[,:%]' '{print $2, $3}' | {
+            read -r status capacity
+
+            if [ "$status" = Discharging -a "$capacity" -lt 2 ]; then
+              dunstify -u critical -a batMon \
+                -h string:x-dunst-stack-tag:batMon \
+                -h int:value:"$capacity" "Battery Critical: ''${capacity}%
+          Hibernating"
+              sleep 5
+              systemctl hibernate
+            elif [ "$status" = Discharging -a "$capacity" -lt 5 ]; then
+              dunstify -u critical -a batMon \
+                -h string:x-dunst-stack-tag:batMon \
+                -h int:value:"$capacity" "Battery Critical: ''${capacity}%"
+            fi
+          }
+        '';
+        in {
+          ExecStart = "${batMon}";
+        };
+      };
+    };
+  };
+
 }

home/xinitrc

@@ -17,4 +17,5 @@ systemctl restart --user dunst
 systemctl restart --user picom
 systemctl restart --user polybar
 systemctl restart --user network-manager-applet
+systemctl restart --user battery-check.timer
 exec berry