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build_ruby19.sh
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# This is a script to install both ruby 1.8.7 and 1.9.1, with suffixed binaries and aliased non-suffixed binaries
 
mkdir -p /usr/local/src ; cd /usr/local/src
wget ftp://ftp.ruby-lang.org/pub/ruby/1.8/ruby-1.8.7-p72.tar.bz2
tar -xjvf ruby-1.8.7-p72.tar.bz2
cd ruby-1.8.7-p72
./configure --prefix=/usr --program-suffix=18 --enable-shared
make && sudo make all install
 
cd /usr/local/src
wget http://rubyforge.iasi.roedu.net/files/rubygems/rubygems-1.3.1.tgz
tar -xzvf rubygems-1.3.1.tgz
cd rubygems-1.3.1
sudo /usr/bin/ruby18 setup.rb
sudo /usr/bin/gem18 update --system
 
cd /usr/local/src
wget ftp://ftp.ruby-lang.org/pub/ruby/1.9/ruby-1.9.1-p0.tar.bz2
tar -xjvf ruby-1.9.1-p0.tar.bz2
cd ruby-1.9.1-p0
./configure --prefix=/usr --program-suffix=19 --enable-shared
make && sudo make all install
 
cd /usr/bin
binaries=( erb gem irb rdoc ri ruby testrb )
for binary in ${binaries[@]}; do
sudo mv ${binary}{,~} # Just in case
sudo ln -s $(pwd)/${binary}19 $(pwd)/${binary}
done

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