A brightness manager script, writting in ruby

bright

#!/usr/bin/ruby

require 'optparse'
require 'optparse/time'
require 'ostruct'
require 'pp'

Version = [0, 0, 1]

class OptparseBright

  def self.parse(args)
    options = OpenStruct.new
    options.encoding = "utf8"

    opt_parser = OptionParser.new do |opts|
      opts.banner = "Usage: bright [options]\nVersion: %{version}" % {version: ::Version.join('.')}

      opts.separator ""
      opts.separator "Specific options:"

      opts.on("-i", "--inc", "Increment the brightness") do
        exec "xbacklight -inc 10"
      end

      opts.on("-d", "--dec", "Decrement the brightness") do
        exec "xbacklight -dec 10"
      end

      opts.separator ""
      opts.separator "Common options:"

      opts.on_tail("-h", "--help", "Show this message") do
        puts opts
        exit
      end

      opts.on_tail("-v", "--version", "Show version") do
        puts ::Version.join('.')
        exit
      end
    end

    opt_parser.parse!(args)
    options
  end

end

if ARGV.empty?
    ARGV.push "-h"
end

begin
    options = OptparseBright.parse(ARGV)
    pp options
    pp ARGV
rescue OptionParser::InvalidOption => e
    e = e.to_s
    e[0] = e.chars.first.upcase
    puts e
    exit 1 
end