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|
{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.batteryNotifier;
in
{
options = {
services.batteryNotifier = {
enable = mkOption {
default = false;
description = ''
Whether to enable battery notifier.
'';
};
device = mkOption {
default = "BAT0";
description = ''
Device to monitor.
'';
};
notifyCapacity = mkOption {
default = 10;
description = ''
Battery level at which a notification shall be sent.
'';
};
suspendCapacity = mkOption {
default = 5;
description = ''
Battery level at which a suspend unless connected shall be sent.
'';
};
};
};
config = mkIf cfg.enable {
systemd.user.timers."lowbatt" = {
description = "check battery level";
timerConfig.OnBootSec = "5m";
timerConfig.OnUnitInactiveSec = "5m";
timerConfig.Unit = "lowbatt.service";
wantedBy = [ "timers.target" ];
};
systemd.user.services."lowbatt" = {
description = "battery level notifier";
serviceConfig.PassEnvironment = "DISPLAY";
script = ''
export battery_capacity=$(${pkgs.coreutils}/bin/cat /sys/class/power_supply/${cfg.device}/capacity)
export battery_status=$(${pkgs.coreutils}/bin/cat /sys/class/power_supply/${cfg.device}/status)
if [[ $battery_capacity -le ${builtins.toString cfg.notifyCapacity} && $battery_status = "Discharging" ]]; then
${pkgs.libnotify}/bin/notify-send --urgency=critical --hint=int:transient:1 --icon=battery_empty "Battery Low: $battery_capacity%"
fi
if [[ $battery_capacity -le ${builtins.toString cfg.suspendCapacity} && $battery_status = "Discharging" ]]; then
${pkgs.libnotify}/bin/notify-send --urgency=critical --hint=int:transient:1 --icon=battery_empty "Battery Critically Low: $battery_capacity%"
sleep 60s
battery_status=$(${pkgs.coreutils}/bin/cat /sys/class/power_supply/${cfg.device}/status)
if [[ $battery_status = "Discharging" ]]; then
systemctl suspend
fi
fi
'';
};
};
}
|
