Silence assets

config_initializers_quiet_assets.rb

# thanks to cmer for this
if Rails.env.development?
  Rails.application.assets.logger = Logger.new('/dev/null')
  Rails::Rack::Logger.class_eval do
    def call_with_quiet_assets(env)
      previous_level = Rails.logger.level
      Rails.logger.level = Logger::ERROR if env['PATH_INFO'].index("/assets/") == 0
      call_without_quiet_assets(env).tap do
        Rails.logger.level = previous_level
      end
    end
    alias_method_chain :call, :quiet_assets
  end
end