Less-sensitive fingerprint

honeybadger.rb

PROJECT_ROOT = Regexp.new(/\A\[PROJECT_ROOT\]/)

Honeybadger.configure do |config|
  config.before_notify do |notice|
    location = begin
      Hash(notice.parsed_backtrace.find { |l| PROJECT_ROOT.match(l[:file].to_s) } || notice.parsed_backtrace.first)
    rescue
      {}
    end

    notice.fingerprint = [
      notice.error_class, 
      notice.component, 
      "#{location["file"]}:#{location["method"]}"
    ].join(':')
  end
end

Thanks for the update!