Check if a version is the latest git tag version

is-latest-version.sh

#!/bin/sh
# Check if the passed version is greater than the versions registered in the git tags
# Uses sort -V from GNU sort to sort versions and assumes git tags in 
# semver format v<major>.<minor>.<patch>

check_version="$1"
if [ -z "$check_version" ]; then
  # Assume it's not the latest version
  echo "No version specified. Usage: $0 <version>"
  echo "Example: $0 v1.1.0 -> checks if v1.1.0 is greater than the versions in the git tags"
  exit 1
fi

set -e

latest_in_tags=`( echo $check_version ; git tag ) | grep v | sort -r -V | head -1`
if [ "$latest_in_tags" != "$check_version" ]; then
  echo "Version $check_version is not the latest version"
  exit 1
fi

echo "Version $check_version is the latest version"
exit 0