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module Rails
  # Needs to be duplicated from Active Support since its needed before Active
  # Support is available. Here both Options and Hash are namespaced to prevent
  # conflicts with other implementations AND with the classes residing in Active Support.
  # ---
  # TODO: w0t?
  class << self
    def application
      @@application ||= nil
    end

    def application=(application)
      @@application = application
    end

    # The Configuration instance used to configure the Rails environment
    def configuration
      application.configuration
    end

    def initialize!
      application.initialize!
    end

    def initialized?
      @initialized || false
    end

    def initialized=(initialized)
      @initialized ||= initialized
    end

    def logger
      if defined?(RAILS_DEFAULT_LOGGER)
        RAILS_DEFAULT_LOGGER
      else
        nil
      end
    end

    def backtrace_cleaner
      @@backtrace_cleaner ||= begin
        # Relies on ActiveSupport, so we have to lazy load to postpone definition until AS has been loaded
        require 'rails/backtrace_cleaner'
        Rails::BacktraceCleaner.new
      end
    end

    def root
      application && application.config.root
    end

    def env
      @_env ||= ActiveSupport::StringInquirer.new(RAILS_ENV)
    end

    def cache
      RAILS_CACHE
    end

    def version
      VERSION::STRING
    end

    def public_path
      @@public_path ||= self.root ? File.join(self.root, "public") : "public"
    end

    def public_path=(path)
      @@public_path = path
    end
  end
end