class Jars::MavenSettings

def global_settings
  @_jars_maven_global_settings_ = nil unless instance_variable_defined?(:@_jars_maven_global_settings_)
  if @_jars_maven_global_settings_.nil?
    if (mvn_home = ENV['M2_HOME'] || ENV['MAVEN_HOME'])
      settings = File.join(mvn_home, 'conf/settings.xml')
      settings = false unless File.exist?(settings)
    else
      settings = false
    end
    @_jars_maven_global_settings_ = settings
  end
  @_jars_maven_global_settings_ || nil
end