Install Ruby and Jenkins on Visual Studio Online environment.

Install.sh

# Install ruby-build
sudo apt install ruby-build -y

# Install Ruby 2.4.0
rbenv install 2.4.0

# Add rbenv initialization to profile
echo 'export PATH="$HOME/.rbenv/shims:$PATH"' >> ~/.bash_profile
echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile

# Execute the profile script
source ~/.bash_profile

# Set Ruby 2.4.0 version as global preference
rbenv global 2.4.0

# Add gem initialization to profile
echo '# Install Ruby Gems to ~/gems' >> ~/.bashrc
echo 'export GEM_HOME=$HOME/gems' >> ~/.bashrc
echo 'export PATH=$HOME/gems/bin:$PATH' >> ~/.bashrc

# execute the profile script
source ~/.bashrc

# Update gem
sudo gem update --system

# Install Jekyll and Bundler
gem install jekyll bundler