code: def get_buildroot(self, build_id):
          
  
          docker_info = self.tasker.get_info()
          host_arch, docker_version = get_docker_architecture(self.tasker)
  
          buildroot = {
              'id': 1,
              'host': {
                  'os': docker_info['OperatingSystem'],
                  'arch': host_arch,
              },
              'content_generator': {
                  'name': PROG,
                  'version': atomic_reactor_version,
              },
              'container': {
                  'type': 'docker',
                  'arch': os.uname()[4],
              },
              'tools': [
                  {
                      'name': tool['name'],
                      'version': tool['version'],
                  }
                  for tool in get_version_of_tools()] + [
                  {
                      'name': 'docker',
                      'version': docker_version,
                  },
              ],
              'components': self.get_rpms(),
              'extra': {
                  'osbs': {
                      'build_id': build_id,
                      'builder_image_id': self.get_builder_image_id(),
                  }
              },
          }
  
          return buildroot
docs: Build the buildroot entry of the metadata.
  
          :return: dict, partial metadata