battery

#!/usr/bin/env bash
# Show MacBook battery level formatted for tmux status bar.
#
# Adapted from: https://github.com/Goles/Battery

battery_charge() {
  ioreg -c AppleSmartBattery -w0 | \
    grep -o '"[^"]*" = [^ ]*' | \
    sed -e 's/= //g' -e 's/"//g' | \
    sort | \
    while read key value; do
      case $key in
        "MaxCapacity")
          export maxcap=$value;;
        "CurrentCapacity")
          export curcap=$value;;
      esac
      if [[ -n "$maxcap" && -n $curcap ]]; then
        CAPACITY=$(( 100 * curcap / maxcap))
        printf "%d" $CAPACITY
        break
      fi
    done
}

BATTERY_STATUS=`battery_charge`
[ -z "$BATTERY_STATUS" ] && exit 1

if [ $BATTERY_STATUS -lt 25 ]; then
  fg=colour210
  bg=colour88
elif [ $BATTERY_STATUS -lt 75 ]; then
  fg=colour228
  bg=colour94
else
  fg=colour8
  bg=colour234
fi

printf "#[fg=${fg},bg=${bg}] %2d%%" $BATTERY_STATUS