DOCKER_GID
      IMG
      IMAGE_NAME
      IMAGE_VERSION
      REPO_ROOT
      BUILD_WITH_CONTAINER
)

# For non container build, we need to write env to file
if [[ "${1}" == "envfile" ]]; then
  # ! does a variable-variable https://stackoverflow.com/a/10757531/374797
  for var in "${VARS[@]}"; do
    echo "${var}"="${!var}"
  done
else
  for var in "${VARS[@]}"; do