A quick script to demonstrate an easy way to execute ruby

gistfile1.rb

#!/usr/bin/env ruby
require 'trollop'

class Command
  def initialize(options = {})
    @default_name = options[:name]
  end

  def execute
    name = ask "Hello, ...?" unless name = @default_name
    say "Hello, #{name}!"
  rescue Interrupt
    puts "\n\n"
    say "Okay then... Good bye!"
  end

  private

  def say(text)
    $stdout.puts text.to_s
  end

  def ask(text)
    say(text)
    $stdout.print '> '
    result = $stdin.gets.chomp
    $stdout.puts
    result
  end
end

options = Trollop::options do
  opt :name, "The default name to use", type: :string
end

command = Command.new(options)
command.execute