deploy.rb

namespace :deploy do
  desc "precompile and deploy the assets to the server"

  task :precompile_assets, :roles => :app do
    if ENV['SKIP_ASSETS']
      run "cp -a #{previous_release}/public/assets #{release_path}/public"
    else
      run_locally "#{rake} RAILS_ENV=#{rails_env} RAILS_GROUPS=assets assets:precompile"
      run "mkdir -p #{release_path}/public/assets"
      transfer(:up, "public/assets", "#{release_path}/public/assets", chunk_size: 16_384) { print "." }
      run_locally "rm -rf public/assets"    # clean up to avoid conflicts with development-mode assets
    end
  end
end