A transform function for Rollbar to remove text that creates new items

rollbar_transform.rb

def transform_payload(opts)
  ex_msg = opts[:payload]['data'][:body][:trace][:exception][:message] rescue nil
  if ex_msg =~ /#<(.*)(:0x[a-f0-9]{8})>$/
    # Convert
    # "undefined method `blow_up!' for #<Customer:0x7b417d08>"
    # to
    # "undefined method `blow_up!' for #<Customer>"
    # to prevent rollbar storms when each message has a different hash
    opts[:payload]['data'][:body][:trace][:exception][:message].gsub! $2, ''
  end

  frames = opts[:payload]['data'][:body][:trace][:frames] rescue nil
  frames.each do |f|
    # Convert '/engine-5b4dd9344243/' to '/engine/' to prevent rollbar from creating new items after each update
    if f[:filename] =~ /(\-[0-9a-z]{12})\//
      f[:filename].gsub $1, ''
    end

    # This next one strips out the unique id in JRuby land that is in the first frame
    # "org/jruby/gen/InterfaceImpl725942136.gen"
    if f[:filename] =~ /InterfaceImpl([\d]{8,12})\.gen/
      f[:filename].gsub $1, ''
    end

    # This is for our web app, which has the commit in the path, and also causes a new rollbar after each deploy
    # "/home/user/app/releases/c4c9ac2c2e35a3e9b62a77f5105c22862726b701/Rakefile"
    if f[:filename] =~ /releases\/([0-9a-f]{36,44})\//
      f[:filename].gsub $1, 'redacted-commit-id'
    end
  end if frames
end