system

# File lib/bundler/ruby_version.rb, line 104
    def self.system
      ruby_engine = if defined?(RUBY_ENGINE) && !RUBY_ENGINE.nil?
        RUBY_ENGINE.dup
      else
        # not defined in ruby 1.8.7
        "ruby"
      end
      # :sob: mocking RUBY_VERSION breaks stuff on 1.8.7
      ruby_version = ENV.fetch("BUNDLER_SPEC_RUBY_VERSION") { RUBY_VERSION }.dup
      ruby_engine_version = case ruby_engine
                            when "ruby"
                              ruby_version
                            when "rbx"
                              Rubinius::VERSION.dup
                            when "jruby"
                              JRUBY_VERSION.dup
                            else
                              RUBY_ENGINE_VERSION.dup
      end
      patchlevel = RUBY_PATCHLEVEL.to_s

      @ruby_version ||= RubyVersion.new(ruby_version, patchlevel, ruby_engine, ruby_engine_version)
    end