Capistrano local assets compile

deploy.rb

# Rewrite precompile tasks to do it locally
Rake::Task["deploy:compile_assets"].clear
task :compile_assets => [:set_rails_env] do
  # invoke 'deploy:assets:precompile'
  invoke 'deploy:assets:precompile_local'
  invoke 'deploy:assets:backup_manifest'
end

namespace :assets do
  task :precompile_local do
    # compile assets locally
    run_locally do
      execute "RAILS_ENV=#{fetch(:stage)} bin/rake assets:precompile"
    end

    # rsync to each server
    local_dir = "./public/assets/"
    on(roles :web) do
      remote_dir = "#{host.user}@#{host.hostname}:#{release_path}/public/assets/"
      run_locally { execute "rsync -av #{local_dir} #{remote_dir}" }
    end

    # clean up
    run_locally { execute "rm -rf #{local_dir}" }
  end
end