From: Igor Pirnovar <gooigpi@...>
Date: 2009-04-21T02:34:17+09:00
Subject: Re: unsubscribe

Implement something like the following:

#!/bin/bash

if [ $# -eq 0 ]; then
  version=9
else
  case $1 in
  -h|-H) echo "usage: $(basename $0) -8|-9  | [-h]"; exit;;
  8|-8) version=8;;
  9|-9) version=9;;
  *) echo Illegal argument; exit;;
  esac
fi

if [ $version = 9 ] ;then
  echo Currently your ruby version is 1.9
  rm /usr/bin/ruby
  ln -s /usr/bin/ruby1.9 /usr/bin/ruby
  rm /usr/bin/irb
  ln -s /usr/bin/irb1.9 /usr/bin/irb
else
  echo Currently your ruby version is 1.8
  rm /usr/bin/ruby
  ln -s /usr/bin/ruby1.8 /usr/bin/ruby
  rm /usr/bin/irb
  ln -s /usr/bin/irb1.8 /usr/bin/irb
fi


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