do_login() {
docker_version=$( docker -v | awk '{print $3}')
if version_lt "$docker_version" "17.06.0" && \
- "$DOCKERHUB_REGISTRY" == "docker.io" && \
+ [ "$DOCKERHUB_REGISTRY" == "docker.io" ] && \
"$DOCKERHUB_EMAIL:-none" != 'none'
then
docker login -u "$USER" -p "$PASS" -e "$2" "$1"