#!/bin/bash -v
set -e
set -x
export PATH=/usr/local/bin:/usr/bin:/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.9.3
cd /usr/local/src
export RUBY_VERSION=2.5.0
export INSTALL_DIR=/usr/local/ruby-${RUBY_VERSION}
export suffix="-${RUBY_VERSION//./}"

if [ ! -f ruby-${RUBY_VERSION}.tar.bz2 ]
then
  wget https://ftp.ruby-lang.org/pub/ruby/ruby-${RUBY_VERSION}.tar.bz2
fi
sudo rm -rf ruby-${RUBY_VERSION}
sudo rm -rf ${INSTALL_DIR}
tar -jxf ruby-${RUBY_VERSION}.tar.bz2
cd ruby-${RUBY_VERSION}
autoconf
./configure --prefix=${INSTALL_DIR} --program-suffix=${suffix} --libdir=${INSTALL_DIR}/lib --disable-install-doc 2>&1 | tee configure.log
make -j12
sudo make install
sudo rm -f /usr/local/bin/*${suffix}
sudo ln -s ${INSTALL_DIR}/bin/*${suffix} /usr/local/bin
sudo ${INSTALL_DIR}/bin/gem${suffix} install bundler
sudo ln -s  ${INSTALL_DIR}/bin/bundle  /usr/local/bin/bundle${suffix}

# now you should be able to call bundle-250 exec ruby-250 -v in a directory containing a Gemfile