Simple bash spinner

spin

#!/usr/bin/env bash

# source this file in your scripts and use as so:
# <command> & spin "Text to display while command is running"

function spin() {
  local tag="$1"
  local pid=$! # get the pid of the last background process
  local sp="⠋⠙⠹⠸⠼⠴⠦⠧⠇⠏"
  local i=1

  while kill -0 $pid &>/dev/null; do
    printf "\r\e[0;32m${sp:i++%${#sp}:1}\e[0m $tag"
    sleep .1
  done

  # wait for the loop to finish
  if wait $pid &>/dev/null; then
    printf "\e[0;32m Done!\e[0m\n\n"
  else
    printf "\e[0;31m Failed!\e[0m\n\n"
    exit 1
  fi
}