54 lines
1.7 KiB
Nix
54 lines
1.7 KiB
Nix
{ config, pkgs, lib, ... }:
|
|
|
|
# Regularly check the battery status and send a notification when it discharges
|
|
# below certain thresholds.
|
|
# Implemented by calling the `acpi` program regularly. This is the simpler and
|
|
# safer approach because the battery might not send discharging events.
|
|
|
|
let conf = config.modules.battery_monitor;
|
|
|
|
in {
|
|
options.modules.battery_monitor = with lib; {
|
|
enable = mkEnableOption "battery_monitor";
|
|
};
|
|
|
|
config = lib.mkIf conf.enable {
|
|
# Regularly check battery status
|
|
systemd.user.services.battery_monitor = {
|
|
wants = [ "display-manager.service" ];
|
|
wantedBy = [ "graphical-session.target" ];
|
|
script = ''
|
|
count_10=0
|
|
prev_val=100
|
|
check () { [[ $1 -ge $val ]] && [[ $1 -lt $prev_val ]]; }
|
|
notify () {
|
|
${pkgs.libnotify}/bin/notify-send -a Battery "$@" \
|
|
-h "int:value:$val" "Discharging" "$val%, $remaining"
|
|
}
|
|
while true; do
|
|
IFS=: read _ bat0 < <(${pkgs.acpi}/bin/acpi -b)
|
|
IFS=\ , read status val remaining <<<"$bat0"
|
|
val=''${val%\%}
|
|
if [[ $status = Discharging ]]; then
|
|
echo "$val%, $remaining"
|
|
|
|
if check 20; then notify
|
|
elif check 15 || [[ $val -le 7 ]]; then notify -u critical
|
|
elif [[ $val -le 4 ]]
|
|
then
|
|
${pkgs.notify}/bin/notify-send -a Hibernate soon...
|
|
sleep 10
|
|
${pkgs.notify}/bin/notify-send -a Hibernate NOW
|
|
sudo systemctl hibernate
|
|
fi
|
|
fi
|
|
prev_val=$val
|
|
# Sleep longer when battery is high to save CPU
|
|
if [[ $val -gt 30 ]]; then sleep 10m; elif [[ $val -ge 20 ]]; then sleep 5m; else sleep 1m; fi
|
|
done
|
|
'';
|
|
};
|
|
|
|
};
|
|
}
|