1 files changed, 25 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/lazy_load_hooks.rb b/activesupport/lib/active_support/lazy_load_hooks.rb
new file mode 100644
index 0000000000..36acfda524
--- /dev/null
+++ b/activesupport/lib/active_support/lazy_load_hooks.rb
@@ -0,0 +1,25 @@
+module ActiveSupport
+  module LazyLoadHooks
+    def _setup_base_hooks
+      @base_hooks ||= Hash.new {|h,k| h[k] = [] }
+      @base ||= {}
+    end
+
+    def base_hook(name = nil, &block)
+      _setup_base_hooks
+
+      if base = @base[name]
+        base.instance_eval(&block)
+      else
+        @base_hooks[name] << block
+      end
+    end
+
+    def run_base_hooks(base, name = nil)
+      _setup_base_hooks
+
+      @base_hooks[name].each { |hook| base.instance_eval(&hook) } if @base_hooks
+      @base[name] = base
+    end
+  end
+end
+\ No newline at end of file