Bash script to install Ko on Linux

ko_install.sh

#!/usr/bin/env bash
set -e

if [[ $EUID -ne 0 ]]; then
  echo "This script must be run as root" 1>&2
  exit 1
fi

version=0.18.1
bin_name=ko
arch=$(uname -m)

tmp_dl_path=/tmp/$bin_name.tar.gz
tmp_bin_path=/tmp/$bin_name
install_path=/usr/local/bin

case $arch in
  x86_64)
    curl -Lo $tmp_dl_path https://github.com/ko-build/ko/releases/download/v$version/ko_${version}_Linux_x86_64.tar.gz
    ;;
  aarch64)
    curl -Lo $tmp_dl_path https://github.com/ko-build/ko/releases/download/v$version/ko_${version}_Linux_arm64.tar.gz
    ;;

  *)
    echo "unsupported architecture"
    exit 1
    ;;
esac

tar -xzvf $tmp_dl_path -C $install_path $bin_name
chmod +x $install_path/$bin_name

exit 0