thor-hollaback-example.rb

require ‘thor’
require ‘thor/hollaback’

module MyProgram
  class Error < StandardError
  end

  class CLI
    class_option :debug, desc: 'Sets up debug mode', aliases: ['-d'], type: :boolean
    class_around :safe_execute

    desc ‘test [arg]’, ‘The test command’
    def test(arg)
      raise Error, ‘Oh no!’ if arg == ‘fail’
    end

    no_commands do
      def safe_execute
        yield
      rescue Error => error
        raise error if options[:debug]
        STDERR.puts error.message
        exit 1
      end
    end
  end
end