Greeter script structure example

README.md

Structure of Ruby Scripts

This is an example of how to structure one-off Ruby scripts for easy growth, without making a big mess.

For more details on this, you can read my blog post about the idea or Confident Ruby by Avdi Grimm

greeter.rb

#!/usr/bin/env ruby

require 'optparse'

at_exit do
  options = parse_options
  greet(options[:name])
end

def parse_options(args = ARGV)
  {
    name: 'world'
  }.tap do |options|
    parser = OptionParser.new do |opts|
      opts.on('-n=NAME', '--name=NAME', 'Name to greet', String) do |value|
        options[:name] = value
      end
    end

    parser.parse!(args)
  end
end

def greet(name)
  puts "Hello, #{name}"
end