#!/bin/bash

user="$(whoami)"
if [[ "root" = "$user" ]] ; then
  echo -e "$(tput setaf 1) <e> root user support is not yet implemented.$(tput sgr0)"
  exit 1
fi

item="$(tput setaf 2)* $(tput sgr0)"
question="\n$(tput setaf 2)<?>$(tput sgr0)"
cwd=$(pwd)
source_dir="${source_dir:-"$(dirname $0 | xargs dirname)"}"
if [[ ! -d "$source_dir" ]] ; then unset source_dir ; fi
source_dir="${source_dir:-$cwd}"
rvm_path=~/.rvm

# State what is required to use rvm
echo -e "\n$(tput setaf 2)rvm$(tput sgr0)\n\n    shell scripts that allows a user to manage multiple ruby versions in their own account."
echo -e "\n    Installing rvm to ~/.rvm/ ..."
for dir_name in src scripts bin log archives config gems examples ; do
  mkdir -p $rvm_path/$dir_name
done

rm -rf $rvm_path/scripts # Clear the old scripts directory so that the old style rvm- scripts are cleared out.
for dir_name in config scripts examples lib ; do
  mkdir -p $rvm_path/$dir_name
  /bin/cp -Rf $source_dir/$dir_name $rvm_path
done ; unset dir_name

for file_name in rvm-prompt gemsync ; do
  mv $rvm_path/scripts/$file_name $rvm_path/bin/
  chmod +x $rvm_path/bin/$file_name
done ; unset file_name

cp -f $source_dir/README $rvm_path/

if [[ -z "$rvm_loaded_flag" ]] ; then
  for rcfile in .bash_profile .bashrc .zshrc ; do
    if [[ ! -e ~/$rcfile ]] ; then touch ~/$rcfile ; fi
    if [[ -z "$(awk '/\.rvm\/scripts\/rvm/' ~/$rcfile)" ]] ; then
      echo "Adding 'if [[ -s ~/.rvm/scripts/rvm ]] ; then source ~/.rvm/scripts/rvm ; fi' to your ~/$rcfile."
      echo -e "\n# rvm-install added line:\nif [[ -s ~/.rvm/scripts/rvm ]] ; then source ~/.rvm/scripts/rvm ; fi\n" >> ~/$rcfile
    fi
  done
fi

echo -e "\n    Ensuring that rvm script location in $file is scripts/rvm not bin/rvm for: ~/.bash_profile, ~/.bashrc, ~/.zshrc..."
for file in ~/.bash_profile ~/.bashrc ~/.zshrc ; do
  if [[ -s $file ]] ; then
    if [[ -L $file ]] ; then         # If the file is a symlink,
      actual_file="$(readlink $file)" # read the link target so we can preserve it.
    else
      actual_file="$file"
    fi

    grep 'rvm\/bin\/rvm' $actual_file > /dev/null
    if [[ $? -eq 0 ]] ; then
      sed -i.orig 's#rvm/bin/rvm #rvm/scripts/rvm #g' $actual_file
      rm -f $actual_file.orig
    fi

    if [[ -f ~/.profile ]] ; then
      grep '.profile' $actual_file > /dev/null
      if [[ $? -gt 0 ]] ; then
        profile=~/.profile
        echo -e "\n" >> $actual_file
        echo "source $profile" >> $actual_file
      fi
    fi
  fi
done

if [[ -f ~/.rvm/bin/rvm ]] ; then
  echo -e "\n    Removing old rvm file from ~/.rvm/bin/rvm..."
  rm -f ~/.rvm/bin/rvm
fi

system="$(uname)"
echo -e "\n    $(tput setaf 3)NOTES: $(tput sgr0)\n"
if [[ "Linux" = "$system" ]] ; then
  rvm_apt_get_binary="$(which aptitude 2> /dev/null)"
  rvm_emerge_binary="$(which emerge 2> /dev/null)"
  rvm_pacman_binary="$(which pacman 2> /dev/null)"
  rvm_yum_binary="$(which yum 2> /dev/null)"

  if [[ ! -z "$rvm_apt_get_binary" ]] ; then
    echo -e "    $item For jRuby (if you wish to use it) you will need:"
    echo -e "       $ sudo aptitude install sun-java6-bin sun-java6-jre sun-java6-jdk"
    echo -e "    $item For ree (if you wish to use it) you will need:"
    echo -e "       $ sudo aptitude install libreadline5-dev libssl-dev bison"

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

  elif [[ ! -z "$rvm_pacman_binary" ]] ; then
    echo -e "    $item For jRuby (if you wish to use it) you will need:"
    echo -e "       $ sudo pacman -Sy jdk jre"

  elif [[ ! -z "$rvm_yum_binary" ]] ; then
    echo -e "    $item For ree (if you wish to use it) you will need:"
    echo -e "       $ yum install -y rpm-build gcc gcc-c++ redhat-rpm-config ; then download and rpmbuild and install the sdk, Have fun..."

  else
    echo -e "    $item For jRuby (if you wish to use it) you will need:"
    echo -e "       The SUN java runtime environment and development kit."
  fi
elif [[ "Darwin" = "$system"  ]] ; then
  echo -e "      $item Be sure that you have XCode Tools installed in order to use rvm."
  echo -e "      $item If you intend on installing MacRuby you must install LLVM first."
fi

echo -e "      $item In order to use rvm the following line must occur in your shell's loading files, after all path/variable settings.:"
echo -e "      $item if [[ -s ~/.rvm/scripts/rvm ]] ; then source ~/.rvm/scripts/rvm ; fi"
echo -e "      $item CLOSE THIS SHELL AND OPEN A NEW ONE in order to use rvm."

echo -e "\n    \033[0;33mRTFM: $(tput sgr0) http://rvm.beginrescueend.com/ \n"
echo -e "$(tput setaf 2)w⦿‿⦿t!$(tput sgr0)"
echo -e "\n    ~ Wayne\n"

source $rvm_path/scripts/rvm
rvm -v
echo