#!/usr/bin/env bash

system="$(uname)"

if [[ "Linux" = "$system" ]] ; then
  for file in /etc/*-release ; do
    release="( $(cat $file) )" ; break
  done
  printf "\n\nNotes for ${system} $release\n"

  rvm_aptitude_binary="$(command -v aptitude || command -v apt-get)"
  rvm_emerge_binary="$(command -v emerge)"
  rvm_pacman_binary="$(command -v pacman)"
  rvm_yum_binary="$(command -v yum)"

  printf "
NOTE: 'ruby' represents Matz's Ruby Interpreter (MRI) (1.8.X, 1.9.X)
             This is the *original* / standard Ruby Language Interpreter
      'ree'  represents Ruby Enterprise Edition
      'rbx'  represents Rubinius

bash >= 3.2 is required
curl is required
git is required (>= 1.7 recommended)
patch is required (for ree and some ruby-head's).

If you wish to install rbx and/or Ruby 1.9 head (MRI) (eg. 1.9.2-head),
then you must install and use rvm 1.8.7 first.

If you wish to have the 'pretty colors' again,
  set 'export rvm_pretty_print_flag=1' in ~/.rvmrc.
"

  if [[ ! -z "$rvm_aptitude_binary" ]] ; then
    printf "
dependencies:
# For RVM
  rvm: bash curl git

# For JRuby (if you wish to use it) you will need:
  jruby: aptitude install curl sun-java6-bin sun-java6-jre sun-java6-jdk

# For Ruby (MRI & ree)  you should install the following OS dependencies:
  ruby: aptitude install build-essential bison openssl libreadline5 libreadline5-dev curl git zlib1g zlib1g-dev libssl-dev libsqlite3-0 libsqlite3-dev sqlite3 libxml2-dev

  ruby-head: git subversion autoconf

# For IronRuby (if you wish to use it) you will need:
  ironruby: aptitude install curl mono-2.0-devel
"

  elif [[ ! -z "$rvm_emerge_binary" ]] ; then
    printf "
dependencies:
  # For RVM
  rvm: bash curl git

  # For MRI based rubies you will need:
  ruby: # TODO: tell Wayne what goes here if you use Gentoo :)
  ruby-head: # TODO: tell Wayne what goes here if you use Gentoo :)

  # For JRuby (if you wish to use it) you will need:
  jruby: emerge dev-java/sun-jdk dev-java/sun-jre-bin

  # For IronRuby (if you wish to use it) you will need:
  ironruby: emerge dev-lang/mono
    "

  elif [[ ! -z "$rvm_pacman_binary" ]] ; then
    printf "
dependencies:
  # For RVM itself
  rvm: bash curl git

  # For Ruby (MRI & Ree) you should install the following OS dependencies:
  ruby: pacman -Sy --noconfirm patch curl bison zlib readline libxml2 git make
  ruby-head: pacman -Sy --noconfirm subversion autoconf diffutils patch bison make

  # For JRuby (if you wish to use it) you will need:
  jruby: pacman -Sy --noconfirm jdk jre curl

  # For IronRuby (if you wish to use it) you will need:
  ironruby: pacman -Sy --noconfirm mono
"

  elif [[ ! -z "$rvm_yum_binary" ]] ; then
    printf "
dependencies:
  # For RVM
  rvm: yum install -y bash curl git

  # For Ruby (MRI & Ree) you should install the following OS dependencies:
  ruby: yum install -y gcc-c++ patch readline readline-devel zlib zlib-devel libyaml-devel libffi-devel ;
        yum install -y iconv-devel # NOTE: For centos 5.4 final iconv-devel might not be available :(

  # For JRuby (if you wish to use it) you will need:
  jruby: yum install -y java
"

  else
    printf "
dependencies:
  # RVM
  rvm: bash curl git

  # For Ruby (MRI & Ree) you should install the following OS dependencies:
  ruby: # gcc-c++ patch readline zlib libyaml iconv libxml2 libxslt

  # For JRuby (if you wish to use it) you will need:
  jruby: # The SUN java runtime environment and development kit.

  # For IronRuby (if you wish to use it) you will need:
  ironruby: #The Mono Runtime and Development Platform (version 2.6 or greater is recommended).
"
  fi
elif [[ "Darwin" = "$system"  ]] ; then

  release="( $(sw_vers -productName) )"

  printf "
  Notes for ${system} $release
    For Snow Leopard be sure to have Xcode Tools Version 3.2.1 (1613) or later
    You should download the latest Xcode tools from developer.apple.com.
      (This is since the dvd install for Snow Leopard contained bugs).

    If you intend on installing MacRuby you must install LLVM first.
    If you intend on installing JRuby you must install the JDK.
    If you intend on installing IronRuby you must install Mono (version 2.6 or greater is recommended).
  "
fi

echo