sensu/sensu-settings

require "sensu/settings/loader"

module Sensu
  module Settings
    class << self
      attr_accessor :loader

      # Load Sensu settings.
      #
      # Settings are loaded in following order, prior to validation:
      # 1. Environment Variables
      # 2. JSON files on disk
      # 3. Automaticly detected overrides (e.g. hostname, IP address)
      #
      # @param [Hash] options
      # @option options [String] :config_file to load.
      # @option options [String] :config_dir to load.
      # @option options [Array] :config_dirs to load.
      # @return [Loader] a loaded instance of Loader.
      def load(options={})
        loader = Loader.new
        loader.load_env
        if options[:config_file]
          loader.load_file(options[:config_file], false)
        end
        if options[:config_dir]
          loader.load_directory(options[:config_dir])
        end
        if options[:config_dirs]
          options[:config_dirs].each do |directory|
            loader.load_directory(directory)
          end
        end
        loader.load_overrides!
        loader.validate
        loader
      rescue Loader::Error
        loader
      end

      # Retrieve the current loaded settings loader or load one up if
      # there isn't one. Note: We may need to add a mutex for thread
      # safety.
      #
      # @param [Hash] options to pass to load().
      # @return [Loader] instance of a loaded loader.
      def get(options={})
        @loader || @loader = load(options)
      end
    end
  end
end