Docker and Docker-compose one-click installation tutorial (supports online and offline)

#!/bin/sh
# Current directory CURRENT_DIR=$(
 cd "$(dirname "$0")"
 pwd
)

#Install docker 
if which docker >/dev/null; then
 echo "Docker is already installed, skip the installation step"
 docker -v
 echo "Start Docker"
 service docker start 2>&1 | tee -a ${CURRENT_DIR}/install.log
else
 if [[ -d "$CURRENT_DIR/docker" ]]; then
  echo "... install docker offline"
	 cp $CURRENT_DIR/docker/centos-local.tgz /root/
	 cd /root && tar -xvzf centos-local.tgz 
  cd /root/docker-ce-local &&rpm -ivh createrepo-0.9.9-28.el7.noarch.rpm
  mkdir -p /etc/yum.repos.d/repobak && mv /etc/yum.repos.d/CentOS* /etc/yum.repos.d/repobak
  cp $CURRENT_DIR/docker/docker-ce-local.repo /etc/yum.repos.d/docker-ce-local.repo
  cd /root/docker-ce-local &&createrepo /root/docker-ce-local && yum makecache
	 cd $CURRENT_DIR/docker/ &&yum install -y container-selinux-2.9-4.el7.noarch.rpm &&yum install -y docker-ce
	 echo "... start docker"
	 sudo systemctl start docker 2>&1 | tee -a ${CURRENT_DIR}/install.log
	 echo '{"registry-mirrors":["https://registry.docker-cn.com"]}'>/etc/docker/daemon.json
	 cat /etc/docker/daemon.json
	 service docker restart
 else
  echo "... install docker online"
  curl -fsSL https://get.docker.com -o get-docker.sh 2>&1 | tee -a ${CURRENT_DIR}/install.log
  sudo sh get-docker.sh 2>&1 | tee -a ${CURRENT_DIR}/install.log
  echo "... start docker"
  service docker start 2>&1 | tee -a ${CURRENT_DIR}/install.log
 fi
fi

##Install Latest Stable Docker Compose Release
if which docker-compose >/dev/null; then
 echo "Docker Compose is detected to be installed, skipping the installation step"
 docker-compose -v
else
 if [[ -d "$CURRENT_DIR/docker-compose" ]]; then
  echo "... offline installation of docker-compose"
	 cd $CURRENT_DIR/docker-compose/ && cp docker-compose /usr/local/bin/
	 chmod +x /usr/local/bin/docker-compose
	 docker-compose -version
	 echo "... Offline installation of docker-compose successful"
 else
  echo "... install docker-compose online"
  curl -L "https://github.com/docker/compose/releases/download/1.14.0-rc2/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose 2>&1 | tee -a ${CURRENT_DIR}/install.log
  chmod +x /usr/local/bin/docker-compose
  ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
	 docker-compose -version
	 echo "... Successfully installed docker-compose online"
 fi
fi

sed -i 's/\r$//' installDocker.sh
chmod +x installDocker.sh