CLI_VERSION=${1:-"latest"}

set -e

if [ "$(id -u)" -ne 0 ]; then

echo -e 'Script must be run as root. Use sudo, su, or add "USER root" to your Dockerfile before running this script.'

exit 1

export DEBIAN_FRONTEND=noninteractive

if ! dpkg -s curl ca-certificates > /dev/null 2>&1; then

if [ ! -d "/var/lib/apt/lists" ] || [ "$(ls /var/lib/apt/lists/ | wc -l)" = "0" ]; then

apt-get update

fi

apt-get -y install --no-install-recommends curl ca-certificates

if [ "${CLI_VERSION}" = "latest" ] || [ "${CLI_VERSION}" = "current" ] || [ "${CLI_VERSION}" = "lts" ]; then

LATEST_RELEASE=$(curl -sSL -H "Accept: application/vnd.github.v3+json" "https://api.github.com/repos/cli/cli/releases?per_page=1&page=1")

CLI_VERSION=$(echo ${LATEST_RELEASE} | grep -oE 'tag_name":\s*"v[^"]+' | sed -n '/tag_name":\s*"v/s///p')

echo "Downloading github CLI..."

curl -OsSL https://github.com/cli/cli/releases/download/v${CLI_VERSION}/gh_${CLI_VERSION}_linux_amd64.deb

echo "Installing github CLI..."

apt-get install ./gh_${CLI_VERSION}_linux_amd64.deb

echo "Removing github CLI deb file after installation..."

rm -rf ./gh_${CLI_VERSION}_linux_amd64.deb

echo "Done!"