class Bundler::Definition

def concat_ruby_version_requirements(ruby_version, ruby_versions = [])
  return ruby_versions unless ruby_version
  if ruby_version.patchlevel
    ruby_versions << ruby_version.to_gem_version_with_patchlevel
  else
    ruby_versions.concat(ruby_version.versions.map do |version|
      requirement = Gem::Requirement.new(version)
      if requirement.exact?
        "~> #{version}.0"
      else
        requirement
      end
    end)
  end
end