vendor_dir

# File lib/rubygems/defaults.rb, line 166
  def self.vendor_dir # :nodoc:
    if vendor_dir = ENV['GEM_VENDOR'] then
      return vendor_dir.dup
    end

    return nil unless RbConfig::CONFIG.key? 'vendordir'

    File.join RbConfig::CONFIG['vendordir'], 'gems',
              RbConfig::CONFIG['ruby_version']
  end