Created
July 21, 2017 15:43
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#!/usr/bin/env ruby | |
def output_nicely(title, value) | |
puts format('%-25s %6.2f', "#{title}:", value) | |
end | |
data = `/usr/sbin/system_profiler SPPowerDataType` | |
remaining = data[/Charge Remaining.*: (\d+)/, 1].to_f | |
capacity = data[/Full Charge Capacity.*: (\d+)/, 1].to_f | |
amperage = data[/Amperage.*: (\d+)/, 1].to_f | |
voltage = data[/Voltage.*: (\d+)/, 1].to_f | |
calc_power = amperage * voltage / 1000000 | |
calc_percent = remaining / capacity | |
calc_remaining_hours = remaining / amperage | |
output_nicely 'Remaining (%)', (calc_percent * 100) | |
output_nicely 'Current Power Draw (W)', (calc_power) | |
output_nicely 'Remaining Time (H)', (calc_remaining_hours) |
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