ruby_command

# File lib/bundler/vendor/thor/lib/thor/util.rb, line 220
      def ruby_command
        @ruby_command ||= begin
          ruby_name = RbConfig::CONFIG["ruby_install_name"]
          ruby = File.join(RbConfig::CONFIG["bindir"], ruby_name)
          ruby << RbConfig::CONFIG["EXEEXT"]

          # avoid using different name than ruby (on platforms supporting links)
          if ruby_name != "ruby" && File.respond_to?(:readlink)
            begin
              alternate_ruby = File.join(RbConfig::CONFIG["bindir"], "ruby")
              alternate_ruby << RbConfig::CONFIG["EXEEXT"]

              # ruby is a symlink
              if File.symlink? alternate_ruby
                linked_ruby = File.readlink alternate_ruby

                # symlink points to 'ruby_install_name'
                ruby = alternate_ruby if linked_ruby == ruby_name || linked_ruby == ruby
              end
            rescue NotImplementedError # rubocop:disable HandleExceptions
              # just ignore on windows
            end
          end

          # escape string in case path to ruby executable contain spaces.
          ruby.sub!(/.*\s.*/, '"\&"')
          ruby
        end
      end