set: set [-abefhkmnptuvxBCHP] [-o option-name] [--] [arg ...]
    Set or unset values of shell options and positional parameters.

    Options:
      -e  Exit immediately if a command exits with a non-zero status.
      -o option-name
          Set the variable corresponding to option-name:
              pipefail     the return value of a pipeline is the status of
                           the last command to exit with a non-zero status,
                           or zero if no command exited with a non-zero status
      -u  Treat unset variables as an error when substituting.