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