text: #  Copyright 2021 IBM Corporation
  #
  #  Licensed under the Apache License, Version 2.0 (the "License");
  #  you may not use this file except in compliance with the License.
  #  You may obtain a copy of the License at
  #
  #  http://www.apache.org/licenses/LICENSE-2.0
  #
  #  Unless required by applicable law or agreed to in writing, software
  #  distributed under the License is distributed on an "AS IS" BASIS,
  #  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #  See the License for the specific language governing permissions and
  #  limitations under the License.
  
  import re as regex
  
  from typing import Optional
  
  import click
  
  
  def validate_node_name(ctx, param, value) -> Optional[str]:  # NOSONAR
      if value is not None and regex.match("(inf|(master|worker)\\d+)$", value) is None:
          raise click.BadParameter("Invalid node name")
  
      return value
  