Compile Rails assets locally and rsync them to server (Capistrano 3)

assets.rake

# lib/capistrano/tasks/assets.rake
namespace :assets do
  desc "Precompile assets locally and then rsync to web servers"
  task :precompile do
    on roles(:web) do
      rsync_host = host.to_s
      run_locally do
        with rails_env: fetch(:stage) do
          execute :bundle, "exec rake assets:precompile"
        end
        execute "rsync -vrhe ssh --progress --delete ./public/assets/ #{fetch(:user)}@#{rsync_host}:#{shared_path}/public/assets/"
        execute "rm -rf public/assets"
        execute "rm -rf tmp/cache/assets"
      end
    end
  end
end

namespace :deploy do
  after :updated, "assets:precompile"
end