Simple sofware version release incrementation script

release_version

#!/usr/bin/env bash

if ! [[ -a "VERSION" ]]; then
  echo "VERSION file initialized"
  touch "VERSION"
  echo "0.0.0" > "VERSION"
fi

version=$(cat VERSION)
version_arr=(${version//./ })

if [[ -z "$1" ]]; then
  echo "Please provide the release type: major, minor or patch"
  exit 1
fi

if [[ "$1" != 'major' ]] && [[ "$1" != 'minor' ]] && [[ "$1" != 'patch' ]]; then
  echo "Please provide the correct release type: major, minor or patch"
  exit 1
fi

if [[ "$1" == 'patch' ]]; then
  let version_arr[2]=${version_arr[2]}+1
  echo "Released patch version:"
fi

if [[ "$1" == 'minor' ]]; then
  let version_arr[1]=${version_arr[1]}+1
  version_arr[2]=0
  echo "Released minor version"
fi

if [[ "$1" == 'major' ]]; then
  let version_arr[0]=${version_arr[0]}+1
  version_arr[1]=0
  version_arr[2]=0
  echo "Released major version"
fi

version=${version_arr[@]}
echo ${version// /.} > "VERSION"
cat "VERSION"