#!/bin/sh

if [ "$(id -u)" -ne 0 ]; then
    echo "This script should be run as root. Aborting..." > /dev/stderr
    exit 1
fi

echo "Adding user to the docker group..."
# This if statement evaulates if the script is launched using sudo AND not
# a `sudo su` logged user
if [ -n "$SUDO_USER" ] && [ "$SUDO_COMMAND" != "/usr/bin/su" ]; then
    usermod -aG docker "$SUDO_USER"
else
    usermod -aG docker "$(id -un)"
fi