Ever wish your thermostat had a "turn heat on for x minutes" feature? Me too, but not enough to spend more than 5 minutes writing a script to do it

warmup.rb

#!/usr/bin/env ruby

# Tell a nest thermostat to kick the heat on for n minutes

require 'nest_thermostat'

unless ARGV[0]
  puts 'Usage: warmup.rb <minutes>'
  exit 1
end

nest = NestThermostat::Nest.new(
  email: ENV['NEST_EMAIL'],
  password: ENV['NEST_PASS'],
  temperature_scale: :celsius
)

seconds_to_warm = (ARGV[0].to_i * 60) + 30
before_temp = nest.temperature
warm_temp = nest.current_temperature + 1

nest.temperature = warm_temp
sleep seconds_to_warm

# reset to previous temp unless the thermostat has been changed by something else
nest.temperature = before_temp unless nest.temperature != warm_temp