# File lib/bundler/cli.rb, line 659
    def open(name)
      editor = [ENV['BUNDLER_EDITOR'], ENV['VISUAL'], ENV['EDITOR']].find{|e| !e.nil? && !e.empty? }
      return Bundler.ui.info("To open a bundled gem, set $EDITOR or $BUNDLER_EDITOR") unless editor
      spec = select_spec(name, :regex_match)
      return unless spec
      Dir.chdir(spec.full_gem_path) do
        command = "#{editor} #{spec.full_gem_path}"
        success = system(command)
        Bundler.ui.info "Could not run '#{command}'" unless success
      end
    end