input: Write a function to generate a Kubernetes pod definition that publishes a tweet every 5 minutes. The function should return the complete YAML specification of the pod, including the necessary container command and ConfigMap for the cron job. If the provided image path is invalid or empty, the function should raise a ValueError.
  assert generate_tweet_pod("public.ecr.aws/example/tweet-publisher")=='''apiVersion: v1
  kind: Pod
  metadata:
    name: tweet-publisher
  spec:
    containers:
      - name: tweet-publisher
        image: public.ecr.aws/example/tweet-publisher
        command:
          - sh
          - -c
          - 'crontab crontabl && while true; do python publish-tweet.py && crontab -l | { cat; echo "*/5 * * * * python publish-tweet.py"; } | crontab -; sleep 31622400; done'
        volumeMounts:
          - mountPath: /crontab/crontab
            subPath: crontab
            name: cronmount
    volumes:
      - name: cronmount
        configMap:
          name: tweet-cron
  ---
  apiVersion: v1
  kind: ConfigMap
  metadata:
    name: tweet-cron
  data:
    crontab: "* * * * * python publish-tweet.py"'''
  assert generate_tweet_pod("")==ValueError
  assert generate_tweet_pod(None)==ValueError
output: def generate_tweet_pod(image_path):
      if not image_path:
          raise ValueError
      return f'''apiVersion: v1
  kind: Pod
  metadata:
    name: tweet-publisher
  spec:
    containers:
      - name: tweet-publisher
        image: {image_path}
        command:
          - sh
          - -c
          - 'crontab crontabl && while true; do python publish-tweet.py && crontab -l | {{ cat; echo "*/5 * * * * python publish-tweet.py"; }} | crontab -; sleep 31622400; done'
        volumeMounts:
          - mountPath: /crontab/crontab
            subPath: crontab
            name: cronmount
    volumes:
      - name: cronmount
        configMap:
          name: tweet-cron
  ---
  apiVersion: v1
  kind: ConfigMap
  metadata:
    name: tweet-cron
  data:
    crontab: "* * * * * python publish-tweet.py"'''