Beginning work on class-based hooks.

lib/jekyll.rb

@@ -32,6 +32,7 @@ require 'toml'
 # internal requires
 require 'jekyll/version'
 require 'jekyll/utils'
+require 'jekyll/hooks'
 require 'jekyll/log_adapter'
 require 'jekyll/stevenson'
 require 'jekyll/deprecator'

lib/jekyll/hooks.rb

@@ -0,0 +1,62 @@
+module Jekyll
+  module Hooks
+
+    class HookCollection
+      include Enumerable
+
+      def each(&block)
+        if block.nil?
+          hook_methods
+        else
+          hook_methods.each &block
+        end
+      end
+
+      def hook_methods
+        @hook_methods ||= Array.new
+      end
+
+      def add_hook(proc)
+        hook_methods << proc
+      end
+
+      def exec(*args)
+        if args.empty?
+          hook_methods.each { |hook| hook.call }
+        else
+          hook_methods.each do |hook|
+            args.each { |arg| hook.call(arg) }
+          end
+        end
+      end
+
+    end
+
+    %w[
+      post_reset
+      pre_read
+      post_read
+      pre_generate
+      post_generate
+      pre_render
+      post_render
+      pre_cleanup
+      post_cleanup
+      pre_write
+      post_write
+    ].each do |method|
+      declaration = <<-METH
+      def #{method}(method_name, *args)
+        cr = caller
+        ((@hooks ||= Hash.new).fetch(method_name.to_s, HookCollection.new)).add_hook -> { cr.send(method_name.to_sym, args) }
+      end
+      def #{method}_exec(*args)
+        ((@hooks ||= Hash.new).fetch(method_name.to_s, HookCollection.new)).exec(*args)
+      end
+METH
+puts declaration
+      class_eval declaration
+    end
+
+  end
+end

lib/jekyll/site.rb

@@ -8,6 +8,8 @@ module Jekyll
 
     attr_accessor :converters, :generators
 
+    include Jekyll::Hooks
+
     # Public: Initialize a new Site.
     #
     # config - A Hash containing site configuration details.