Bundler and Capistrano.rb

namespace :bundler do
  task :create_symlink, :roles => :app do
    set :bundle_dir, File.join(release_path, 'vendor', 'bundle')

    shared_dir = File.join(shared_path, 'bundle')
    run "rm -rf #{bundle_dir}"
    run "mkdir -p #{shared_dir} && ln -s #{shared_dir} #{bundle_dir}"
  end

  task :bundle_new_release, :roles => :app do
    bundler.create_symlink
    run "cd #{release_path} ; bundle install --production --without development test"
  end
end

namespace :deploy do
  after 'deploy:update_code', 'bundler:bundle_new_release'
end