You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: gitlab.rb
    path of file: ./repos/gitlabhq/lib
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'pathname'
require 'forwardable'

require_relative 'gitlab_edition'

module Gitlab
  class << self
    extend Forwardable

    def_delegators :GitlabEdition, :root, :extensions, :ee?, :ee, :jh?, :jh
  end

  def self.version_info
    Gitlab::VersionInfo.parse(Gitlab::VERSION)
  end

  def self.current_mi
    
  def self.revision
    @_revision ||= if File.exist?(root.join("REVISION"))
                     File.read(root.join("REVISION")).strip.freeze
                   else
                     result = Gitlab::Popen.popen_with_detail(
                       %W[#{config.git.bin_path} log --pretty=format:%h --abbrev=11 -n 1]
                     )

                     if result.status.success?
                       result.stdout.chomp.freeze
                     else
                       "Unknown"
                     end