Minikube on WSL helper

minikube-docker-env-wsl.bash

#!/bin/bash

if [ "$_" = "${BASH_SOURCE}" ]
then
  printf 'source this script, do not execute.\n' >&2
  exit 1
fi

eval $(minikube docker-env --shell bash)
if [ -n "${DOCKER_CERT_PATH}" ] && [ "${DOCKER_CERT_PATH:0:1}" != '/' ]
then
  DOCKER_CERT_PATH=$(wslpath -u "${DOCKER_CERT_PATH}")
fi

# The following is required to use the Windows docker.exe binary from WSL.
# If you intend to use the Linux docker binary only, the following is unnecessary.
_add_wslenv="DOCKER_API_VERSION:DOCKER_CERT_PATH/p:DOCKER_HOST:DOCKER_TLS_VERIFY"
case "${WSLENV}" in
  *DOCKER_*)
    # no-op
    ;;
  '')
    WSLENV="${_add_wslenv}"
    ;;
  *)
    WSLENV="${WSLENV}:${_add_wslenv}"
    ;;
esac
unset _add_wslenv
export WSLENV

Maybe the first line would be:
if [ "$_" != "${BASH_SOURCE}" ] ?