#!/bin/sh

# Quick and dirty script to download and install Ruby and Rails in the
# local/ subdirectory of the current directory.  Assumes that the necessary
# development and database tools/libraries are already installed.
#  e.g.  $ sudo apt-get install build-essential sqlite3 \
#           zlib1g-dev libssl-dev libsqlite3-dev libreadline5-dev
# Not very forgiving of errors during extraction, compilation...
#

export PREFIX=$PWD/local
export PATH=$PREFIX/bin:$PATH
export RUBYLIB=$PREFIX/lib
unset RUBYOPT

rubyver="1.8.6-p111"
gemver="1.0.1"

get() {
	if [ $# -ne 1 ]; then
		echo "Specify file to download"
		exit
	fi
	basename=`basename "$1"`
	if [ ! -e "$basename" ]; then
		if ! wget "$1"; then
			echo "Cannot download $basename"
			exit
		fi
	fi
}

get ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-$rubyver.tar.gz
get http://rubyforge.org/frs/download.php/29548/rubygems-$gemver.tgz

tar zxvf ruby-$rubyver.tar.gz
cd ruby-$rubyver
./configure --prefix=$PREFIX
make
make install

cd ..
tar zxvf rubygems-$gemver.tgz
cd rubygems-$gemver
ruby setup.rb all --prefix=$PREFIX

cd ..
gem install rails --include-dependencies
gem install sqlite3-ruby

rm -rf ruby-$rubyver rubygems-$gemver

cat <<END > rails-env
export PATH=$PREFIX/bin:\$PATH
export RUBYLIB=$PREFIX/lib
unset RUBYOPT
END

cat <<END 

To setup environment for Ruby and Rails, please run the command:
   $ . rails-env
END