Capistrano mysql interactive installation

gistfile1.rb

desc "Install the latest stable release of MySql."
task :install, roles: :db, only: {primary: true} do
  #run "echo #{mysql_password}"
  run "#{sudo} apt-get -y update"
  run "#{sudo} apt-get -y install mysql-server" do |channel, stream, data|
    # prompts for mysql root password (when blue screen appears)
    channel.send_data("#{mysql_root_password}\n\r") if data =~ /password/
  end
  run "#{sudo} apt-get -y install mysql-client libmysqlclient-dev"
end