# File lib/git.rb, line 138
  def self.global_config(name = nil, value = nil)
    lib = Git::Lib.new(nil, nil)
    if(name && value)
      # set value
      lib.global_config_set(name, value)
    elsif (name)
      # return value
      lib.global_config_get(name)
    else
      # return hash
      lib.global_config_list
    end
  end