#!/usr/bin/env bash
# Installs Docker Engine in an Ubuntu WSL distribution. Run as root.
set -euo pipefail

if [[ "${EUID}" -ne 0 ]]; then
  echo "Run this script as root." >&2
  exit 1
fi

. /etc/os-release
if [[ "${ID}" != "ubuntu" ]]; then
  echo "This installer supports Ubuntu only (detected: ${ID})." >&2
  exit 1
fi

apt-get update
DEBIAN_FRONTEND=noninteractive apt-get install -y ca-certificates curl

install -m 0755 -d /etc/apt/keyrings
curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc
chmod a+r /etc/apt/keyrings/docker.asc

cat > /etc/apt/sources.list.d/docker.sources <<EOF
Types: deb
URIs: https://download.docker.com/linux/ubuntu
Suites: ${VERSION_CODENAME}
Components: stable
Architectures: $(dpkg --print-architecture)
Signed-By: /etc/apt/keyrings/docker.asc
EOF

apt-get update
DEBIAN_FRONTEND=noninteractive apt-get install -y \
  docker-ce \
  docker-ce-cli \
  containerd.io \
  docker-buildx-plugin \
  docker-compose-plugin

systemctl enable --now docker
docker version --format 'Docker Engine {{.Server.Version}} is ready.'
docker compose version