install docker on a Mac

yo.bash

#!/bin/bash

set -e -u
set -x

_main() {
	softwareupdate --install --all

	type brew || install_brew
	install_packages
}

install_brew() {
	ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
}

install_packages() {
	local readonly APPS=(
		docker
		boot2docker
		hub
	)
	local readonly CASK_APPS=(
		virtualbox
	)

	brew install caskroom/cask/brew-cask
	brew update

	brew cask install "${CASK_APPS[@]}"

	brew install "${APPS[@]}"
}

_main