#!/bin/bash
# abort this script on errors
set -euxo pipefail

setup_docker() (
	# steps from https://docs.docker.com/engine/install/ubuntu/
	sudo apt-get install -y \
		apt-transport-https \
		ca-certificates \
		curl \
		gnupg-agent \
		software-properties-common \
		;

	curl -fsSL https://download.docker.com/linux/ubuntu/gpg |
		sudo apt-key add -

	local repo
	repo=$(
		printf "deb [arch=amd64] https://download.docker.com/linux/ubuntu %s stable" \
			"$(lsb_release -cs)"
	)
	sudo add-apt-repository "$repo"

	sudo apt-get update
	sudo apt-get install -y \
		containerd.io \
		docker-ce \
		docker-ce-cli \
		;
)

# from https://docs.docker.com/compose/install/
setup_docker_compose() (
	local name url
	name=docker-compose-$(uname -s)-$(uname -m)
	url=https://github.com/docker/compose/releases/download/1.26.0/$name
	curl -fsSLO "$url"
	curl -fsSLO "$url.sha256"
	sha256sum -c <"$name.sha256"
	rm -f "$name.sha256"
	chmod +x "$name"
	sudo mv "$name" /usr/local/bin/docker-compose
)

main() (
	export DEBIAN_FRONTEND=noninteractive

	sudo apt-get update
	setup_docker
	setup_docker_compose
	sudo apt-get install -y jq
	sudo usermod -aG docker vagrant
)

main
sync # do not remove!