Rails 4 Capistrano 2 local assets precompile

deploy.rb

namespace :deploy do
  namespace :assets do
    desc 'Run the precompile task locally and rsync with shared'
    task :precompile, :roles => :app, :except => { :no_release => true } do
      system("bundle check"); exit if $? != 0
      system("RAILS_ENV=#{stage} bundle exec rake assets:precompile"); exit if $? != 0
      servers = find_servers :roles => :web, :except => { :no_release => true }
      run <<-CMD.compact
        cp -- #{shared_manifest_path.shellescape} #{current_path.to_s.shellescape}/assets_manifest#{File.extname(shared_manifest_path)}
      CMD
      run <<-CMD.compact
        rm -- #{shared_manifest_path.shellescape}
      CMD
      servers.each { |server| system("rsync --recursive --times --rsh=ssh --compress --human-readable --progress public/assets #{user}@#{server}:#{shared_path} > /dev/null"); exit if $? != 0 }
      system("RAILS_ENV=#{stage} bundle exec rake assets:clean")
    end
  end
end