#!/usr/bin/env bash

system="$(uname)"
item="$(tput setaf 2)* $(tput sgr0)"

if [[ "Linux" = "$system" ]] ; then
  for file in /etc/*-release ; do
    release="( $(cat $file) )" ; break
  done
  echo -e "\n$(tput setaf 2)Notes for ${system} $release$(tput sgr0)\n"

  rvm_apt_get_binary="$(command -v aptitude)"
  rvm_emerge_binary="$(command -v emerge)"
  rvm_pacman_binary="$(command -v pacman)"
  rvm_yum_binary="$(command -v yum)"

  echo -e "\n    $item curl is required.\n"
  echo -e "\n    $item patch is required (for ree, some ruby head's).\n"
  if [[ ! -z "$rvm_apt_get_binary" ]] ; then
    echo -e "    $item For JRuby (if you wish to use it) you will need:"
    echo -e "\n       $ aptitude install curl sun-java6-bin sun-java6-jre sun-java6-jdk"

    echo -e "\n    $item For MRI & ree (if you wish to use it) you will need:"
    echo -e "\n       $ aptitude install curl bison build-essential zlib1g zlib1g-dev libssl-dev libreadline5-dev libreadline6-dev libxml2-dev git-core subversion autoconf"

    echo -e "\n    $item For IronRuby (if you wish to use it) you will need:"
    echo -e "\n       $ aptitude install curl mono-2.0-devel"

  elif [[ ! -z "$rvm_emerge_binary" ]] ; then
    echo -e "    $item For JRuby (if you wish to use it) you will need:"
    echo -e "\n       $ emerge dev-java/sun-jdk dev-java/sun-jre-bin"

    echo -e "\n    $item For IronRuby (if you wish to use it) you will need:"
    echo -e "\n       $ emerge dev-lang/mono"

  elif [[ ! -z "$rvm_pacman_binary" ]] ; then
    echo -e "    $item For MRI based rubies you will need:"
    echo -e "\n       $ pacman -Sy autoconf diffutils patch curl bison zlib readline libxml2 git"

    echo -e "    $item For JRuby (if you wish to use it) you will need:"
    echo -e "\n       $ pacman -Sy jdk jre curl"

    echo -e "\n    $item For IronRuby (if you wish to use it) you will need:"
    echo -e "\n       $ pacman -Sy mono"

  elif [[ ! -z "$rvm_yum_binary" ]] ; then
    echo -e "    $item For MRI/ree (if you wish to use it) you will need:"
    echo -e "\n       $ yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel"
    echo -e "\n       $ yum install -y iconv-devel # NOTE: For centos 5.4 final iconv-devel might not be available :("

    echo -e "\n    $item For JRuby (if you wish to use it) you will need:"
    echo -e "\n       $ yum install -y java"

  else
    echo -e "    $item For JRuby (if you wish to use it) you will need:"
    echo -e "\n      The SUN java runtime environment and development kit."
    echo -e "\n    $item For IronRuby (if you wish to use it) you will need:"
    echo -e "\n      The Mono Runtime and Development Platform (version 2.6 or greater is recommended)."
  fi
elif [[ "Darwin" = "$system"  ]] ; then
  release="( $(sw_vers -productName) )"
  echo -e "\n$(tput setaf 2)Notes for ${system} $release $(tput sgr0)\n"
  echo -e "\n    $item For Snow Leopard be sure to have XCode Tools Version 3.2.1 (1613) or later (there were bugs with the dvd release version)."
  echo -e "\n    $item You should download the latest XCode tools from developer.apple.com. This is necessary since the dvd install for Snow Leopard has bugs."
  echo -e "\n    $item If you intend on installing MacRuby you must install LLVM first."
  echo -e "\n    $item If you intend on installing JRuby you must install the JDK."
  echo -e "\n    $item If you intend on installing IronRuby you must install Mono (version 2.6 or greater is recommended)."
fi

echo