machines/smithers: Added battery warning via keyboard blinking

machines/smithers/batterylight.nix

@@ -0,0 +1,32 @@
+{ pkgs, ... }:
+{
+  systemd.timers."batterylight" = {
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnBootSec = "5m";
+      OnUnitActiveSec = "5m";
+      Unit = "batterylight.service";
+    };
+  };
+
+  systemd.services."batterylight" = {
+    script = ''
+      STATUS=`cat /sys/bus/acpi/drivers/battery/PNP0C0A:00/power_supply/BAT1/status`
+      PERCENT=`cat /sys/bus/acpi/drivers/battery/PNP0C0A:00/power_supply/BAT1/capacity`
+      if [[ $STATUS == "Discharging" && $PERCENT -lt 10 ]]; then
+        for i in `seq 0 3`; do
+          ${pkgs.framework-tool}/bin/framework_tool --kblight 0
+          sleep 0.2
+          ${pkgs.framework-tool}/bin/framework_tool --kblight 100
+          sleep 0.2
+          ${pkgs.framework-tool}/bin/framework_tool --kblight 0
+          sleep 0.2
+        done
+      fi
+    '';
+    serviceConfig = {
+      Type = "oneshot";
+      User = "root";
+    };
+  };
+}

machines/smithers/configuration.nix

@@ -6,6 +6,7 @@
       ./hardware-configuration.nix
       ../../roles/all.nix
       ../../roles/laptop.nix
+      ./batterylight.nix
 
       # import hardware specific settings
       <nixos-hardware/framework/13-inch/7040-amd>