lazily install Docker

dockingdocker.sh

#!/bin/bash
# Docker (Community Edition) Installing Script

# usage: 
# bash -c "$(curl -fsSL https://gist.githubusercontent.com/Quar/09c0fd99ec0e5bf58c74f638b3b5bda1/raw)"

# adapted from
# https://store.docker.com/editions/community/docker-ce-server-ubuntu?tab=description

# check version
UBUNTU_VERSION=$(lsb_release -cs)


echo "----> Installing Prerequisits ..."

if [ ${UBUNTU_VERSION} == 'xenial' ] || [ ${UBUNTU_VERSION} == 'trusty' ]; then
    sudo apt-get -y install \
        apt-transport-https \
        ca-certificates \
        curl

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

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

    sudo apt-get update


    echo "----> Installing Docker (CE) ..."
    sudo apt-get -y install docker-ce

    echo "----> Run tests for Docker (CE) ..."
    sudo docker run hello-world
else
    echo "Docker Community Edition seems not supporting ${UBUNTU_VERSION} ..."
    echo "https://store.docker.com/editions/community/docker-ce-server-ubuntu"
fi