Install heroku client on a system with no sudo/su permissions

install_heroku_no_su.sh

#!/bin/bash
{
  HEROKU_CLIENT_URL="https://s3.amazonaws.com/assets.heroku.com/heroku-client/heroku-client.tgz"
  LOCAL="$HOME/.local"
  LOCAL_HEROKU="$LOCAL/heroku"
  LOCAL_BIN="$LOCAL/bin"

  echo "This will install heroku-client to $LOCAL_BIN"
  echo "This script does NOT require superuser access"

  # download and extract the client tarball
  mkdir -p $LOCAL_BIN
  rm -rf $LOCAL_HEROKU
  mkdir -p $LOCAL_HEROKU
  cd $LOCAL_HEROKU

  if [ -z "$(which wget)" ]; then
    curl -s $HEROKU_CLIENT_URL | tar xz
  else
    wget -qO- $HEROKU_CLIENT_URL | tar xz
  fi

  mv heroku-client/* .
  rmdir heroku-client
  ln -sfn $LOCAL_HEROKU/bin/heroku $LOCAL_BIN

  # remind the user to add to $PATH
  case "$PATH" in
    *$LOCAL_BIN*)
      ;;
    *)
      echo "Add the Heroku CLI to your PATH using:"
      echo "$ echo 'PATH=\"$LOCAL_BIN:\$PATH\"' >> ~/.bashrc"
      ;;
  esac
  
  echo "Installation complete"
}