Set up Ruby and Rails + MySQL

ror-mysql-environment.sh

#!/bin/bash


echo "Setting up RoR and MySQL environment"
echo "Updating repositories..."

if ! sudo apt-get update 
then
  echo "Can't update the repository."
  exit 1
fi

echo "Repositories updated."
echo "Installing needed packages..."

if ! sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev nodejs 
then
  echo "Can't install the package."
  exit 1
fi

echo "Packages installed."

echo "Installing rbenv..."

cd
sudo rm -rf ~/.rbenv
git clone https://github.com/rbenv/rbenv.git ~/.rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc

sudo rm -rf ~/.rbenv/plugins/ruby-build
git clone https://github.com/rbenv/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc

if ! rbenv install 2.4.2 
then
  echo "Can't install rbenv"
  exit 1
fi

if ! rbenv global 2.4.2 
then
  echo "Can't set up rbenv as global."
  exit 1
fi

echo "Ruby installed!"

RUBY_VERSION="$(ruby -v)"
echo "Version: ${RUBY_VERSION}"

echo "Setting up Rails.."

echo "Downloading NodeJS..."
curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -

if ! sudo apt-get install -y nodejs 
then
  echo "Can't install NodeJS"
  exit 1
fi

echo "Installing Rails"

if ! gem install rails -v 5.1.4 
then
  echo "Can't install Rails"
  exit 1
fi

rbenv rehash

echo "Rails installed"

RAILS_VERSION="$(rails -v)"
echo "Version: ${RAILS_VERSION}"

echo "Installing MySQL"

if ! sudo apt-get install mysql-server mysql-client libmysqlclient-dev 
then
  echo "Can't install MySQL"
  exit 1
fi

echo "MySQL installed."

echo "Your environment is ready!"