#!/usr/bin/env bash
set -euo pipefail

echo "==> Setting up Docker..."

if command -v docker &>/dev/null; then
    echo "    docker already installed: $(docker --version)"
else
    echo "    installing docker engine..."
    # official docker install script (works on Ubuntu/Mint)
    curl -fsSL https://get.docker.com | sudo sh
fi

# add current user to docker group so we don't need sudo
if ! groups | grep -q docker; then
    sudo usermod -aG docker "$USER"
    echo "    added $USER to docker group — log out and back in to apply"
fi

echo "==> Docker done."