BT5 Set Ruby Environment

#!/usr/bin/env bash
# Description:
# Some tools (whatweb and others) require ruby 1.8 and others (i.e. BeEF) require ruby 1.9.2
# This script allows you to quickly change from ruby 1.8 to 1.9.2 and viceversa
#
# Author Abraham Aranguren <[email protected]> http://securityconscious.blogspot.com


if [ $# -ne 1 ]; then
        echo "Syntax: $0 <ruby_version: 1.8, 1.9.2>"
        echo
        echo "Examples:"
        echo "- Set ruby 1.8: $0 1.8"
        echo "- Set ruby 1.9.2: $0 1.9.2"
        exit
fi

VERSION=$1
echo $VERSION

OPTION="1"
if [ '1.9.2' == $VERSION ]; then
        OPTION="2"
fi

# Export version gem paths
export GEM_PATH=/var/lib/gems/$VERSION/gems
export GEM_HOME=/var/lib/gems/$VERSION/gems
# Pick ruby version
#(sleep 2 ; echo $OPTION) | update-alternatives --config ruby > /dev/null
(sleep 2 ; echo $OPTION) | update-alternatives --config ruby