Remove Digests from rails 4 assets

deploy.rb

namespace :deploy do
  namespace :assets do
    task :remove_digests do
      run %( cd #{latest_release} && bundle exec rake assets:remove_digests RAILS_ENV=#{rails_env}), :once => true
    end
  end
end

after 'deploy:assets:precompile', 'deploy:assets:remove_digests'

production.rb

MyApp::Application.configure do
  config.assets.digest = false
end

remove_digests.rake

namespace :assets do
  task remove_digests: :environment do
    assets = Dir.glob(File.join(Rails.root, 'public/assets/**/*'))
    regex = /(?<!manifest)(-{1}[a-z0-9]{32}\.{1}){1}/
    assets.each do |file|
      next if File.directory?(file) || file !~ regex

      source = file.split('/')
      source.push(source.pop.gsub(regex, '.'))

      non_digested = File.join(source)
      FileUtils.cp(file, non_digested)
    end
  end
end