Guardfile monkeypatch adding rspec style focus tags to cucumber

Guardfile-patch.rb

# Add focus support to cucumber
require 'guard/cucumber'
::Guard::Cucumber::Runner.class_eval do
  class << self
    alias original_command cucumber_command
    def cucumber_command(paths, options={})
      command = original_command(paths, options)
      has_focus = paths.any? &method(:has_focus?)
      command += " --tags @focus:4" if has_focus
      command
    end

    def has_focus?(file)
      focus_regexp = /^\s*@focus/
      extension = '.feature'

      begin
        File.read(file) =~ focus_regexp
      rescue Errno::EISDIR => e
        Dir.glob("#{file}/**/*#{extension}").any? &method(:has_focus?)
      rescue Errno::ENOENT => e
        UI.debug "\e[31mMissing directory: #{base_path}"
      end
    end
  end
end