code: def find_component_tarball(bucket, comp_name, comp_config):
      
      values = {
              'name': comp_name,
              'version': comp_config['version'],
              'platform': comp_config['platform'],
              }
      template = comp_config.get('archive_template')
      if template:
          key_name = template % values
      else:
          key_name = '%(name)s/%(name)s-%(version)s.tar.gz' % values
      if not bucket.get_key(key_name):
          log.error('%s not found' % key_name)
          return False
      return True
docs: Returns True if the component tarball is found in the bucket.
  
      Otherwise, returns False.