Update the SemVer in the git repository, where it's maintained using git tags, optionally filtered by tag prefix. It can also be used for MonoRepo

bump-semver.sh

#!/usr/bin/env bash

# git version 2.38.1

set -euo pipefail

_get_latest_tag() {
	local prefix="${1:-}"
	git tag -i -l "${prefix}*" --sort -v:refname | head -n1
}

_get_current_version() {
	local tag_prefix="${1:-}"
	local current_version
	current_version=$(_get_latest_tag "${tag_prefix}" | sed -e "s/${tag_prefix}//")
	if [ -z "${current_version}" ]; then
		echo "0.0.0"
	else
		echo "${current_version}"
	fi
}

_bump_semver() {
	local current_version="${1}"
	local sem_ver_name
	sem_ver_name=$(echo "${2}" | tr '[:upper:]' '[:lower:]')
	IFS='.' read -r -a semvers <<<"${current_version}"

	case "${sem_ver_name}" in
	patch) echo "${semvers[0]}.${semvers[1]}.$((semvers[2]  + 1))" ;;
	minor) echo "${semvers[0]}.$((semvers[1]  + 1)).0" ;;
	major) echo "$((semvers[0]  + 1)).0.0" ;;
	*)
		echo "Invalid semver"
		exit 1
		;;
	esac
}

_bump_semver_tag() {
  local dry_run
  if [[ $(echo "${DRY_RUN:-false}" | tr '[:upper:]' '[:lower:]') == "false" ]]; then
      dry_run=""
  else
      dry_run="echo "
  fi

	local sem_ver_name="${1:-patch}"
	local tag_prefix
	tag_prefix=$(echo "${2:-}" | tr '[:upper:]' '[:lower:]')

	local current_version

	current_version=$(_get_current_version "${tag_prefix}")

	local new_version
	new_version=$(_bump_semver "${current_version}" "${sem_ver_name}")

	${dry_run} git tag -a "${tag_prefix}${new_version}" -m "Bump version to ${new_version}"
}

_bump_semver_tag "$@"

# sh bump-semver.sh "patch" "v"
# DRY_RUN=true sh bump-semver.sh "patch" "v"