docs: def publish(dataset_uri):
      """Return access URL to HTTP enabled (published) dataset.
  
      Exits with error code 1 if the dataset_uri is not a dataset.
      Exits with error code 2 if the dataset cannot be HTTP enabled.
      """
  
      try:
          dataset = dtoolcore.DataSet.from_uri(dataset_uri)
      except dtoolcore.DtoolCoreTypeError:
          print("Not a dataset: {}".format(dataset_uri))
          sys.exit(1)
  
      try:
          access_uri = dataset._storage_broker.http_enable()
      except AttributeError:
          print(
              "Datasets of type '{}' cannot be published using HTTP".format(
                  dataset._storage_broker.key)
          )
          sys.exit(2)
  
      return access_uri