Convenience script to install GitHub CLI on Ubuntu

install-gh-cli.sh

#!/bin/bash
set -e

###############################################################################################
# This is a convenience script for installing the Github gh CLI. Invoke as follows:           #
# curl -fsSL https://gist.github.com/yourusername/gist-hash/raw/install-gh-cli.sh | sudo bash #
# Author: Mike Stankavich https://github.com/mikestankavich    [email protected]            #
###############################################################################################

# Root check
if [[ $EUID -ne 0 ]]; then
  echo "This script must be run as root (e.g., with 'sudo bash')."
  exit 1
fi

KEYRING_PATH="/etc/apt/keyrings/githubcli-archive-keyring.gpg"
SOURCE_LIST="/etc/apt/sources.list.d/github-cli.list"
ARCH=$(dpkg --print-architecture)
KEY_URL="https://cli.github.com/packages/githubcli-archive-keyring.gpg"
REPO_ENTRY="deb [arch=$ARCH signed-by=$KEYRING_PATH] https://cli.github.com/packages stable main"

# Download and install keyring
mkdir -p -m 755 /etc/apt/keyrings
TEMPFILE=$(mktemp)
curl -fsSL "$KEY_URL" > "$KEYRING_PATH"
chmod go+r "$KEYRING_PATH"
rm "$TEMPFILE"

# Add GitHub CLI apt source
mkdir -p -m 755 /etc/apt/sources.list.d
echo "$REPO_ENTRY" > "$SOURCE_LIST"

# Update package lists and install gh
apt update
apt install -y gh