class ActiveFedora::FileConfigurator

def load_fedora_config
  return @fedora_config unless @fedora_config.empty?
  @fedora_config_path = config_path(:fedora)
  ActiveFedora::Base.logger.info("ActiveFedora: loading fedora config from #{::File.expand_path(@fedora_config_path)}")
  begin
    config_erb = ERB.new(IO.read(@fedora_config_path)).result(binding)
  rescue StandardError
    raise("fedora.yml was found, but could not be parsed with ERB. \n#{$ERROR_INFO.inspect}")
  end
  begin
    fedora_yml = if Gem::Version.new(Psych::VERSION) >= Gem::Version.new('3.1.0.pre1')
                   YAML.safe_load(config_erb, permitted_classes: [], permitted_symbols: [], aliases: true)
                 else
                   YAML.safe_load(config_erb, [], [], true) # allow YAML aliases
                 end
  rescue Psych::SyntaxError => e
    raise "fedora.yml was found, but could not be parsed. " \
          "Error #{e.message}"
  end
  config = fedora_yml.symbolize_keys
  cfg = config[ActiveFedora.environment.to_sym] || {}
  @fedora_config = cfg.is_a?(Array) ? cfg.map(&:symbolize_keys) : cfg.symbolize_keys
end