47 lines
1.5 KiB
Nix
47 lines
1.5 KiB
Nix
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{ pkgs, ... }:
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pkgs.writeShellApplication {
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name = "notify-battery";
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runtimeInputs = with pkgs; [
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acpi
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bash
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coreutils
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dbus
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];
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text = ''
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set +o nounset
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set +o pipefail
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export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
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export DISPLAY=:0
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# Battery percentage at which to notify.
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BATTERY_DISCHARGING=$(acpi -b | grep "Battery 0" | grep -c "Discharging")
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BATTERY_LEVEL=$(acpi -b | grep "Battery 0" | grep -P -o '[0-9]+(?=%)')
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WARNING_LEVEL=20
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# Use two files to store whether we've shown a notification or not (to prevent multiple notifications).
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EMPTY_FILE=/tmp/battery-empty
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FULL_FILE=/tmp/battery-full
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# Reset notifications if the computer is charging/discharging.
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if [ "$BATTERY_DISCHARGING" -eq 1 ] && [ -f $FULL_FILE ]; then
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rm $FULL_FILE
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elif [ "$BATTERY_DISCHARGING" -eq 0 ] && [ -f $EMPTY_FILE ]; then
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rm $EMPTY_FILE
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fi
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# If the battery is charging and is full (and has not shown notification yet).
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if [ "$BATTERY_LEVEL" -gt 95 ] && [ "$BATTERY_DISCHARGING" -eq 0 ] && [ ! -f $FULL_FILE ]; then
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notify-send "Battery Charged" "Battery is fully charged." -r 9991
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touch $FULL_FILE
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# If the battery is low and is not charging (and has not shown notification yet).
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elif [ "$BATTERY_LEVEL" -le $WARNING_LEVEL ] && [ "$BATTERY_DISCHARGING" -eq 1 ] && [ ! -f $EMPTY_FILE ]; then
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notify-send "Low Battery" "''${BATTERY_LEVEL}% of battery remaining." -u critical -r 9991 -t 0
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touch $EMPTY_FILE
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fi
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'';
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}
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