Golang installing and updating Script

golang_install_update.sh

#!/usr/bin/env bash
download_go() {
  wget "https://dl.google.com/go/${1}.linux-amd64.tar.gz" -P /tmp/go/
  sudo tar xf "/tmp/go/${1}.linux-amd64.tar.gz" -C /usr/local/
  echo 'export PATH="$PATH:/usr/local/go/bin"' | sudo tee /etc/profile.d/go.sh
  source /etc/profile.d/go.sh
}

# main starts here

if [ "$EUID" -ne 0 ]; then
  echo "Please run as root"
  exit
fi

installed_version_str=$(go version 2>/dev/null | grep -Eo 'go[0-9]+.[0-9]+.[0-9]+')
cloud_version_str=$(curl 'https://golang.org/VERSION?m=text')
cloud_version_num=$(echo cloud_version_str | sed 's/[^0-9]*//g')

if [[ -z $installed_version_str ]]; then
  printf ">>>>>>>>>>\n\n\ngo is not installed🧨.\n\n Downloading %s\n\n\n" "$cloud_version_str"
  download_go "$cloud_version_str"
else
  installed_version_num=$("echo ${installed_version_str} | sed 's/[^0-9]*//g'")
  if ((installed_version_num < cloud_version_num)) | [[ -z $installed_version_num ]]; then
    printf "%s is currently installed, %s version is available\nUpdating go🗂" "$installed_version_str" "$cloud_version_str"
    download_go "$cloud_version_str"
  elif ((installed_version_num >= cloud_version_num)); then
    echo "$installed_version_str is upto date👍"
  fi
fi