41 lines
1.3 KiB
Nix
41 lines
1.3 KiB
Nix
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{ config, pkgs, lib, ... }:
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let conf = config.modules.battery_monitor;
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in {
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options.modules.battery_monitor = with lib; {
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enable = mkEnableOption "battery_monitor";
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};
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config = lib.mkIf conf.enable {
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# Regularly check battery status
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systemd.user.services.battery_monitor = {
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wants = [ "display-manager.service" ];
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wantedBy = [ "graphical-session.target" ];
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script = ''
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prev_val=100
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check () { [[ $1 -ge $val ]] && [[ $1 -lt $prev_val ]]; }
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notify () {
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${pkgs.libnotify}/bin/notify-send -a Battery "$@" \
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-h "int:value:$val" "Discharging" "$val%, $remaining"
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}
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while true; do
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IFS=: read _ bat0 < <(${pkgs.acpi}/bin/acpi -b)
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IFS=\ , read status val remaining <<<"$bat0"
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val=''${val%\%}
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if [[ $status = Discharging ]]; then
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echo "$val%, $remaining"
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if check 30 || check 25 || check 20; then notify
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elif check 15 || [[ $val -le 10 ]]; then notify -u critical
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fi
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fi
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prev_val=$val
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# Sleep longer when battery is high to save CPU
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if [[ $val -gt 30 ]]; then sleep 10m; elif [[ $val -ge 20 ]]; then sleep 5m; else sleep 1m; fi
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done
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'';
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};
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};
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}
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