Semi-automation script of Let's Encrypt. https://letsencrypt.org/

letsencrypt_cert_standalone.sh

#!/bin/bash -xv

letsencrypt_path=$1
if [ ! -e ${letsencrypt_path}/certbot-auto ]; then
  pushd ~/
  git clone https://github.com/letsencrypt/letsencrypt && [ ! -e ${letsencrypt_path}/certbot-auto ] && exit 1
  popd
fi

domain_name=$2
[ ${domain_name:-_} = "_" ] && exit 1

python_version=$(python --version 2>&1 | egrep -o "[0-9\.]+" )
pyenv_local_changed="false"
if [ "${python_version:0:1}" != 2 ]; then
  pyenv install 2.7.11
  pyenv local 2.7.11
  pyenv_local_changed="true"
fi

function error_exit {
  if [ "${pyenv_local_changed}" = "true" ]; then
    rm .python_version
  fi
  exit 1
}

# ${letsencrypt_path}/letsencrypt-auto certonly -a standalone -d ${domain_name}
${letsencrypt_path}/certbot-auto certonly -a standalone -d ${domain_name}
[ $? != 0 ] && error_exit


sudo cp -p /etc/letsencrypt/live/${domain_name}/fullchain.pem ~/${domain_name/./_}_fullchain.pem
[ $? != 0 ] && error_exit