60 lines
No EOL
1.9 KiB
Nix
60 lines
No EOL
1.9 KiB
Nix
{ config, pkgs, lib, ... }:
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# Regularly check the battery status and send a notification when it discharges
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# below certain thresholds.
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# Implemented by calling the `acpi` program regularly. This is the simpler and
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# safer approach because the battery might not send discharging events.
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# author: github:Julow
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let conf = config.modules.battery-notify;
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in {
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options.modules.battery-notify = with lib; {
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enable = mkEnableOption "battery-notify";
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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-notify = {
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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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get_battery_glyph() {
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local val="$1"
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if [[ "$val" -le 10 ]]; then
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echo "" # or echo -e "\uf244" if using the Unicode code
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elif [[ "$val" -le 25 ]]; then
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echo ""
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elif [[ "$val" -le 50 ]]; then
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echo ""
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elif [[ "$val" -le 75 ]]; then
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echo ""
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else
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echo ""
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fi
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}
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notify () {
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glyph=$(get_battery_glyph $val)
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${pkgs.libnotify}/bin/notify-send -a bat-notify "$glyph $val%"
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}
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while true; do
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IFS=: read _ bat0 < <(${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 75 || check 50 ||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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} |