Terraform latest version install script (modified to zsh and exclude alpha versions)

terraform-install.sh

#!/bin/bash

function terraform-install() {
  [[ -f ${HOME}/bin/terraform ]] && echo "`${HOME}/bin/terraform version` already installed at ${HOME}/bin/terraform" && return 0
  LATEST_URL=$(curl -sL https://releases.hashicorp.com/terraform/index.json | jq -r '.versions[].builds[].url' | egrep 'terraform_[0-9]\.[0-9]{1,2}\.[0-9]{1,2}_linux.*amd64' | sort -V | tail -1)
  curl ${LATEST_URL} > /tmp/terraform.zip
  mkdir -p ${HOME}/bin
  (cd ${HOME}/bin && unzip /tmp/terraform.zip)
  if [[ -z $(grep 'export PATH=${HOME}/bin:${PATH}' ~/.bashrc) ]]; then
  	echo 'export PATH=${HOME}/bin:${PATH}' >> ~/.zshrc
  fi
  
  echo "Installed: `${HOME}/bin/terraform version`"
  
  cat - << EOF 
 
Run the following to reload your PATH with terraform:

  source ~/.zshrc

EOF
}

terraform-install