Shell script which force updates a git tag

Here's a shell script that will force update an existing Git tag:

#!/bin/sh

# Get the tag name from user input
echo "Enter the tag name you want to update:"
read tag_name

# Verify that the tag exists
tag_exists=$(git tag -l "$tag_name")

if [ -z "$tag_exists" ]; then
  echo "Tag $tag_name does not exist!"
  exit 1
fi

# Force update the tag
git tag -f "$tag_name"

# Push the tag to the remote repository
git push -f origin "$tag_name"

echo "Tag $tag_name has been force updated!"

Here's how it works:

1. The script prompts the user to enter the name of the tag they want to update.
2. The script checks if the tag exists using the git tag -l command. If the tag does not exist, the script prints an error message and exits with a status of 1.
3. If the tag exists, the script force updates the tag using the git tag -f command.
4. The script pushes the updated tag to the remote repository using the git push -f command.
5. The script prints a message indicating that the tag has been force updated.