All bash version compare

version_compare.sh

#!/bin/bash

xxx="go1.18.3"
xxx2="go1.10.2"

str_to_array() {
  local IFS='.'
  local NEW_ARRAY=(0 0 0 0)
  local version_part_index=0
  for i in $1; do
    NEW_ARRAY[$version_part_index]=$i
    version_part_index=$((version_part_index+1))
  done
  local IFS=' '
  echo "${NEW_ARRAY[*]}"
}


z1=$(str_to_array "$xxx")
z1=($z1)
z2=$(str_to_array "$xxx2")
z2=($z2)
echo "${z2[*]}"
version_part_index=0
too_old=0
for i in "${z2[@]}"; do
  old_part="${z1[version_part_index]}";
  new_part="$i"
  if (( new_part > old_part )); then
    break
  elif (( old_part > new_part )); then
    echo "older"
    too_old=1
    break
  fi
  version_part_index=$((version_part_index+1))
done