fan

#!/usr/bin/env bash

help(){
    cat<<__EOF__
usage:  m fan [ speed | monitor | help ]
__EOF__
}

is_on_battery_power(){
    pmset -g adapter | grep -i wattage >/dev/null 2>&1
    return "${?}"
}

fan_speed_monitor() {
    sudo powermetrics -i 200 --samplers smc |awk 'BEGIN {  print "Monitoring ..." ; } /Fan/{ printf "  %s\r", $0 } fflush(stdout)'
}

fan_speed(){
    if ! is_on_battery_power; then
        printf 'This machine appears to be running on battery power. Please try again after connecting to a power outlet.\n'
      return
    fi

    echo $'Fan: '"$(sudo powermetrics -s smc -n 1 -i 200 -f plist | plutil -extract 'smc.fan' xml1 -o - - | plutil -p -)"$' RPM'
}

case $1 in
    help)
        help
        ;;
    speed)
        fan_speed
        ;;
    monitor)
        fan_speed_monitor
        ;;
    *)
        help
        ;;
esac