module Honeybadger::Config::Yaml

def self.load_yaml(path)
  begin
    # This uses `YAML.unsafe_load` to support loading arbitrary Ruby
    # classes, such as !ruby/regexp. This was the default behavior prior
    # to Psych 4. https://bugs.ruby-lang.org/issues/17866
    method = YAML.respond_to?(:unsafe_load) ? :unsafe_load : :load
    yaml = YAML.send(method, ERB.new(path.read).result)
  rescue => e
    config_error = ConfigError.new(e.to_s)
    if e.backtrace
      backtrace = e.backtrace.map do |line|
        if line.start_with?('(erb)'.freeze)
          line.gsub('(erb)'.freeze, path.to_s)
        else
          line
        end
      end
      config_error.set_backtrace(backtrace)
    end
    raise config_error
  end
  case yaml
  when Hash
    yaml
  when NilClass, FalseClass
    {}
  else
    raise ConfigError, "The configuration file #{path} is invalid."
  end
end