gistfile1.rb

Motion::Gem.build do |gem|
  files = `git ls-files`.split($\)
  
  gem.files = files.grep(%r{^lib/motion-redgreen/app/})
  gem.spec_files = files.grep(%r{^lib/motion-redgreen/spec/})
  
  gem.pre_build do |config|
    redgreen_style_file = File.join(config.build_dir, 'redgreen_style_config.rb')
    redgreen_style = config.redgreen_style || :focused
    
    File.open(redgreen_style_file, 'wb') do |f|
      f << "$RedGreenStyleFormat = :#{@redgreen_style}\n"
    end
    
    gem.spec_files.insert(0, redgreen_style_file)
  end
end