mackerel-osx-battery.rb

#! /usr/bin/env ruby

$ioreg = `ioreg -r -n AppleSmartBattery`
$now = Time.now

def asb(item)
  ret = $ioreg.match(/(#{item})[\"= ]+(\d+)$/)
  ret[2].to_i
end

puts "Battery.capacity.MaxCapacity\t#{asb("MaxCapacity")}\t#{$now.to_i}"
puts "Battery.capacity.CurrentCapacity\t#{asb("CurrentCapacity")}\t#{$now.to_i}"
puts "Battery.cycle.CycleCount\t#{asb("CycleCount")}\t#{$now.to_i}"
puts "Battery.temperature.Temperature\t#{asb("Temperature").to_f / 100}\t#{$now.to_i}"

timeremain = asb("TimeRemaining")
puts "Battery.timeremaining.TimeRemaining\t#{timeremain > 2000 ? 0 : timeremain}\t#{$now.to_i}"