1 files changed, 81 insertions, 0 deletions
diff --git a/railties/lib/rails/application/bootstrap.rb b/railties/lib/rails/application/bootstrap.rb
new file mode 100644
index 0000000000..9baf8aa742
--- /dev/null
+++ b/railties/lib/rails/application/bootstrap.rb
@@ -0,0 +1,81 @@
+require "active_support/notifications"
+require "active_support/dependencies"
+require "active_support/descendants_tracker"
+
+module Rails
+  class Application
+    module Bootstrap
+      include Initializable
+
+      initializer :load_environment_hook, group: :all do end
+
+      initializer :load_active_support, group: :all do
+        require "active_support/all" unless config.active_support.bare
+      end
+
+      initializer :set_eager_load, group: :all do
+        if config.eager_load.nil?
+          warn <<-INFO
+config.eager_load is set to nil. Please update your config/environments/*.rb files accordingly:
+
+  * development - set it to false
+  * test - set it to false (unless you use a tool that preloads your test environment)
+  * production - set it to true
+
+INFO
+          config.eager_load = config.cache_classes
+        end
+      end
+
+      # Initialize the logger early in the stack in case we need to log some deprecation.
+      initializer :initialize_logger, group: :all do
+        Rails.logger ||= config.logger || begin
+          path = config.paths["log"].first
+          unless File.exist? File.dirname path
+            FileUtils.mkdir_p File.dirname path
+          end
+
+          f = File.open path, 'a'
+          f.binmode
+          f.sync = config.autoflush_log # if true make sure every write flushes
+
+          logger = ActiveSupport::Logger.new f
+          logger.formatter = config.log_formatter
+          logger = ActiveSupport::TaggedLogging.new(logger)
+          logger
+        rescue StandardError
+          logger = ActiveSupport::TaggedLogging.new(ActiveSupport::Logger.new(STDERR))
+          logger.level = ActiveSupport::Logger::WARN
+          logger.warn(
+            "Rails Error: Unable to access log file. Please ensure that #{path} exists and is writable " +
+            "(ie, make it writable for user and group: chmod 0664 #{path}). " +
+            "The log level has been raised to WARN and the output directed to STDERR until the problem is fixed."
+          )
+          logger
+        end
+
+        Rails.logger.level = ActiveSupport::Logger.const_get(config.log_level.to_s.upcase)
+      end
+
+      # Initialize cache early in the stack so railties can make use of it.
+      initializer :initialize_cache, group: :all do
+        unless Rails.cache
+          Rails.cache = ActiveSupport::Cache.lookup_store(config.cache_store)
+
+          if Rails.cache.respond_to?(:middleware)
+            config.middleware.insert_before(::Rack::Runtime, Rails.cache.middleware)
+          end
+        end
+      end
+
+      # Sets the dependency loading mechanism.
+      initializer :initialize_dependency_mechanism, group: :all do
+        ActiveSupport::Dependencies.mechanism = config.cache_classes ? :require : :load
+      end
+
+      initializer :bootstrap_hook, group: :all do |app|
+        ActiveSupport.run_load_hooks(:before_initialize, app)
+      end
+    end
+  end
+end