67 lines
2.8 KiB
Nix
67 lines
2.8 KiB
Nix
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# Thanks to whoever originally wrote this battery_monitor script!
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# (I forgot from whoom i copied it :upside_down:)
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# has to be one of:
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# - Julow: https://github.com/Julow/env/blob/0ea61eafa1c466997cf41406aea7be8a3a805429/modules/battery_monitor.nix
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# - killercho: https://github.com/killercho/nixos-dotfiles/blob/70abcf71d7bb25b242093db6af74d30a18630ce5/scripts/battery_notifier.nix
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# - viato115: https://github.com/viato115/nixos-conf/blob/84d3f419de51d7d4e80a736a4fcfe4b5988e25c6/modules/battery/battery_monitor.nix
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# - modulitos: https://github.com/modulitos/dotfiles/blob/7fb71f0947b1e50060274a5ac72afa2f6a076939/.config/nixpkgs/modules/battery_monitor.nix
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# - JucaRei: https://github.com/JucaRei/nixfiles/blob/916624808168883ac0f282403e593c5cf02db17c/home-manager/_mixins/desktop/hyprland/themes/my-theme/dunst.nix#L168
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# definetly really cool, how it spread across github into so many nixos configs. also github's search for the win.
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# and special thanks to aemogie for reminding me to thank the person i got it from, by starring the mize project :star_struck:
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# https://github.com/aemogie/nivea/blob/9b662d6f1f6dfd350b3d1a9f8f7360a3cb520258/host/battery/monitor.nix
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{ 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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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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count_10=0
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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 20; then notify
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elif check 15 || [[ $val -le 7 ]]; then notify -u critical
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elif [[ $val -le 4 ]]
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then
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${pkgs.notify}/bin/notify-send -a Hibernate soon...
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sleep 10
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${pkgs.notify}/bin/notify-send -a Hibernate NOW
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sudo systemctl hibernate
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fi
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fi
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prev_val=$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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