Guardfile I use for new Rails apps

Guardfile.rb

guard 'livereload' do
  watch(%r{app/.+\.(erb|haml)})
  watch(%r{app/helpers/.+\.rb})
  watch(%r{(public/|app/assets).+\.(css|js|html)})
  watch(%r{(app/assets/.+\.css)\.s[ac]ss}) { |m| m[1] }
  watch(%r{(app/assets/.+\.js)\.coffee}) { |m| m[1] }
  watch(%r{config/locales/.+\.yml})
end

guard 'spork', :wait => 30, :rspec => true, :rspec_env => { 'RAILS_ENV' => 'test' }  do
  watch('config/application.rb')
  watch('config/environment.rb')
  watch(%r{^config/environments/.+\.rb$})
  watch(%r{^config/initializers/.+\.rb$})
  watch('spec/spec_helper.rb')
end

guard 'rspec', :cli => '--drb --color --format documentation', :version => 2 do
  watch(%r{^spec/.+_spec\.rb$})
  watch(%r{^app/(.+)\.rb$})                           { |m| "spec/#{m[1]}_spec.rb" }
  watch(%r{^lib/(.+)\.rb$})                           { |m| "spec/lib/#{m[1]}_spec.rb" }
  watch(%r{^app/controllers/(.+)_(controller)\.rb$})  { |m| ["spec/routing/#{m[1]}_routing_spec.rb", "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb", "spec/acceptance/#{m[1]}_spec.rb"] }
  watch(%r{^spec/support/(.+)\.rb$})                  { "spec" }
  watch('spec/spec_helper.rb')                        { "spec" }
  watch('config/routes.rb')                           { "spec/routing" }
  watch('app/controllers/application_controller.rb')  { "spec/controllers" }
  # Capybara request specs
  watch(%r{^app/views/(.+)/.*\.(erb|haml)$})          { |m| "spec/requests/#{m[1]}_spec.rb" }
end

guard 'rails' do
  watch('Gemfile.lock')
  watch(%r{^(config|lib)/.*})
end