backtrace_silencer.rb code to discard RoutingErrors from the logs

404 needs to shut the fuck up

# Place me in <app>/config/initializers/backtrace_silencer.rb
# Be sure to restart your server when you modify this file.
# No more RoutingError exceptions clogging your logs.

# You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
# Rails.backtrace_cleaner.add_silencer { |line| line =~ /my_noisy_library/ }

# You can also remove all the silencers if you're trying to debug a problem that might stem from framework code.
# Rails.backtrace_cleaner.remove_silencers!

# This is responsible for logging exceptions/showing debugging page if request is local.
# Let's use it to make 404 exceptions inconspicuous rather than silence completely
class ActionDispatch::DebugExceptions
  alias_method :orig_log_error, :log_error
  def log_error(env, wrapper)
    if wrapper.exception.is_a? ActionController::RoutingError
    else
      orig_log_error env, wrapper
    end
  end
end