Guardfile
guard :rspec, cmd: "bundle exec rspec" do
require "guard/rspec/dsl"
dsl = Guard::RSpec::Dsl.new(self)
rspec = dsl.rspec
watch(rspec.spec_helper) { rspec.spec_dir }
watch(rspec.spec_support) { rspec.spec_dir }
watch(rspec.spec_files)
ruby = dsl.ruby
dsl.watch_spec_files_for(ruby.lib_files)
end