Switch AssetHost to be a new-style extension. Setup extensions app scope earlier. Add supports_multiple_instances flag for extensions.

.gitignore

@@ -8,6 +8,7 @@ pkg
 Gemfile.lock
 docs
 .rbenv-*
+.ruby-version
 .*.swp
 build
 doc

middleman-core/lib/middleman-core/core_extensions/extensions.rb

@@ -37,6 +37,7 @@ module Middleman
       class << self
         # @private
         def registered(app)
+          app.define_hook :initialized
           app.define_hook :after_configuration
           app.define_hook :before_configuration
           app.define_hook :build_config
@@ -68,7 +69,6 @@ module Middleman
         # @param [Hash] options Per-extension options hash
         # @return [void]
         def register(extension, options={}, &block)
-          if extension.instance_of? Module
           extend extension
           if extension.respond_to?(:registered)
             if extension.method(:registered).arity === 1
@@ -78,9 +78,6 @@ module Middleman
             end
           end
           extension
-          elsif extension.instance_of?(Class) && extension.ancestors.include?(::Middleman::Extension)
-            extension.new(self, options, &block)
-          end
         end
       end
 
@@ -105,7 +102,22 @@ module Middleman
             logger.error "== Unknown Extension: #{ext}"
           else
             logger.debug "== Activating: #{ext}"
+
+            if ext_module.instance_of? Module
               extensions[ext] = self.class.register(ext_module, options, &block)
+            elsif ext_module.instance_of?(Class) && ext_module.ancestors.include?(::Middleman::Extension)
+              if ext_module.supports_multiple_instances?
+                extensions[ext] ||= {}
+                key = "instance_#{extensions[ext].keys.length}"
+                extensions[ext][key] = ext_module.new(self.class, options, &block)
+              else
+                if extensions[ext]
+                  logger.error "== #{ext} already activated. Overwriting."
+                end
+
+                extensions[ext] = ext_module.new(self.class, options, &block)
+              end
+            end
           end
         end
 
@@ -141,6 +153,8 @@ module Middleman
             instance_eval File.read(local_config), local_config, 1
           end
 
+          run_hook :initialized
+
           run_hook :build_config if build?
           run_hook :development_config if development?
 
@@ -148,10 +162,16 @@ module Middleman
 
           logger.debug "Loaded extensions:"
           self.extensions.each do |ext,_|
+            if ext.is_a?(Hash)
+              ext.each do |k,_|
+                logger.debug "== Extension: #{k}"
+              end
+            else
               logger.debug "== Extension: #{ext}"
             end
           end
         end
       end
     end
+  end
 end

middleman-core/lib/middleman-core/extensions.rb

@@ -1,3 +1,5 @@
+require "active_support/core_ext/class/attribute"
+
 module Middleman
 
   module Extensions
@@ -102,6 +104,8 @@ module Middleman
   end
 
   class Extension
+    class_attribute :supports_multiple_instances, :instance_reader => false, :instance_writer => false
+
     class << self
       def config
         @_config ||= ::Middleman::Configuration::ConfigurationManager.new
@@ -125,10 +129,11 @@ module Middleman
       yield @options if block_given?
 
       ext = self
-      klass.after_configuration do
+      klass.initialized do
         ext.app = self
-        ext.after_configuration
       end
+
+      klass.after_configuration(&method(:after_configuration))
     end
 
     def after_configuration

middleman-more/features/asset_host.feature

@@ -1,7 +1,56 @@
 Feature: Alternate between multiple asset hosts
   In order to speed up page loading
   
-  Scenario: Rendering html with the feature enabled
-    Given the Server is running at "asset-host-app"
+  Scenario: Set single host globally
+    Given a fixture app "asset-host-app"
+    And a file named "config.rb" with:
+      """
+      activate :asset_host
+      set :asset_host, "http://assets1.example.com"
+      """
+    And the Server is running
+    When I go to "/asset_host.html"
+    Then I should see "http://assets1"
+    When I go to "/stylesheets/asset_host.css"
+    Then I should see "http://assets1"
+
+  Scenario: Set proc host globally
+    Given a fixture app "asset-host-app"
+    And a file named "config.rb" with:
+      """
+      activate :asset_host
+      set :asset_host do |asset|
+        "http://assets%d.example.com" % (asset.hash % 4)
+      end
+      """
+    And the Server is running
     When I go to "/asset_host.html"
     Then I should see "http://assets"
+    When I go to "/stylesheets/asset_host.css"
+    Then I should see "http://assets"
+
+  Scenario: Set single host with inline-option
+    Given a fixture app "asset-host-app"
+    And a file named "config.rb" with:
+      """
+      activate :asset_host, :host => "http://assets1.example.com"
+      """
+    And the Server is running
+    When I go to "/asset_host.html"
+    Then I should see "http://assets1"
+    When I go to "/stylesheets/asset_host.css"
+    Then I should see "http://assets1"
+
+  Scenario: Set proc host with inline-option
+    Given a fixture app "asset-host-app"
+    And a file named "config.rb" with:
+      """
+      activate :asset_host, :host => Proc.new { |asset|
+        "http://assets%d.example.com" % (asset.hash % 4)
+      }
+      """
+    And the Server is running
+    When I go to "/asset_host.html"
+    Then I should see "http://assets"
+    When I go to "/stylesheets/asset_host.css"
+    Then I should see "http://assets"

middleman-more/features/asset_host_compass.feature

@@ -1,7 +0,0 @@
-Feature: Alternate between multiple asset hosts
-  In order to speed up page loading
-  
-  Scenario: Rendering css with the feature enabled
-    Given the Server is running at "asset-host-app"
-    When I go to "/stylesheets/asset_host.css"
-    Then I should see "http://assets"

middleman-more/fixtures/asset-host-app/config.rb

@@ -1,6 +0,0 @@
-set :layout, false
-
-activate :asset_host
-set :asset_host do |asset|
-  "http://assets%d.example.com" % (asset.hash % 4)
-end

middleman-more/lib/middleman-more.rb

@@ -83,7 +83,7 @@ module Middleman
         # to avoid browser caches failing to update to your new content.
         Middleman::Extensions.register(:asset_hash) do
           require "middleman-more/extensions/asset_hash"
-          Middleman::Extensions::AssetHash::Extension
+          Middleman::Extensions::AssetHash
         end
 
         # AssetHost allows you to setup multiple domains to host your static

middleman-more/lib/middleman-more/core_extensions/compass.rb

@@ -52,8 +52,14 @@ module Middleman
               # No line-comments in test mode (changing paths mess with sha1)
               compass_config.line_comments = false if ENV["TEST"]
 
-              if config.defines_setting?(:asset_host) && config[:asset_host].is_a?(Proc)
-                compass_config.asset_host(&config[:asset_host])
+              if extensions[:asset_host] && asset_host = extensions[:asset_host].host
+                if asset_host.is_a?(Proc)
+                  compass_config.asset_host(&asset_host)
+                else
+                  compass_config.asset_host do |asset|
+                    asset_host
+                  end
+                end
               end
             end
 

middleman-more/lib/middleman-more/extensions/asset_hash.rb

@@ -1,7 +1,6 @@
 module Middleman
   module Extensions
-    module AssetHash
-      class Extension < ::Middleman::Extension
+    class AssetHash < ::Middleman::Extension
       option :exts, %w(.jpg .jpeg .png .gif .js .css .otf .woff .eot .ttf .svg), "List of extensions that get asset hashes appended to them."
       option :ignore, [], "Regexes of filenames to skip adding asset hashes to"
 
@@ -15,23 +14,11 @@ module Middleman
 
       def after_configuration
         # Allow specifying regexes to ignore, plus always ignore apple touch icons
-          ignore = Array(options.ignore) + [/^apple-touch-icon/]
+        @ignore = Array(options.ignore) + [/^apple-touch-icon/]
 
-          app.sitemap.register_resource_list_manipulator(
-            :asset_hash,
-            AssetHashManager.new(app, options.exts, ignore)
-          )
+        app.sitemap.register_resource_list_manipulator(:asset_hash, self)
 
-          app.use Middleware, :exts => options.exts, :middleman_app => app, :ignore => ignore
-        end
-      end
-
-      # Central class for managing asset_hash extension
-      class AssetHashManager
-        def initialize(app, exts, ignore)
-          @app = app
-          @exts = exts
-          @ignore = ignore
+        app.use Middleware, :exts => options.exts, :middleman_app => app, :ignore => @ignore
       end
 
       # Update the main sitemap resource list
@@ -50,7 +37,7 @@ module Middleman
             -1
           end
         end.each do |resource|
-            next unless @exts.include? resource.ext
+          next unless options.exts.include? resource.ext
           next if @ignore.any? { |ignore| Middleman::Util.path_match(ignore, resource.destination_path) }
 
           # Render through the Rack interface so middleware and mounted apps get a shot
@@ -89,7 +76,7 @@ module Middleman
 
           if body
             # TODO: This regex will change some paths in plan HTML (not in a tag) - is that OK?
-              body.gsub! /([=\'\"\(]\s*)([^\s\'\"\)]+(#{@exts_regex_text}))/ do |match|
+            body.gsub!(/([=\'\"\(]\s*)([^\s\'\"\)]+(#{@exts_regex_text}))/) do |match|
               opening_character = $1
               asset_path = $2
 
@@ -116,7 +103,6 @@ module Middleman
       end
     end
   end
-  end
 end
 
 

middleman-more/lib/middleman-more/extensions/asset_host.rb

@@ -3,24 +3,19 @@ module Middleman
   module Extensions
 
     # Asset Host module
-    module AssetHost
+    class AssetHost < ::Middleman::Extension
+      option :host, nil, 'The asset host to use, or false for no asset host, or a Proc to determine asset host'
 
-      # Setup extension
-      class << self
+      def initialize(app, options_hash={}, &block)
+        super
 
-        # Once registered
-        def registered(app, options={})
-          app.config.define_setting :asset_host, false, 'The asset host to use, or false for no asset host, or a Proc to determine asset host'
-
-          if options[:host]
-            config[:asset_host] = options[:host]
-          end
-
-          # Include methods
+        # Backwards compatible API
+        app.config.define_setting :asset_host, nil, 'The asset host to use, or false for no asset host, or a Proc to determine asset host'
         app.send :include, InstanceMethods
       end
 
-        alias :included :registered
+      def host
+        app.config[:asset_host] || options[:host]
       end
 
       # Asset Host Instance Methods
@@ -32,13 +27,15 @@ module Middleman
         # @param [String] prefix
         # @return [String]
         def asset_url(path, prefix="")
-          original_output = super
-          return original_output unless config[:asset_host]
+          controller = extensions[:asset_host]
 
-          asset_prefix = if config[:asset_host].is_a?(Proc)
-            config[:asset_host].call(original_output)
-          elsif config[:asset_host].is_a?(String)
-            config[:asset_host]
+          original_output = super
+          return original_output unless controller.host
+
+          asset_prefix = if controller.host.is_a?(Proc)
+            controller.host.call(original_output)
+          elsif controller.host.is_a?(String)
+            controller.host
           end
 
           File.join(asset_prefix, original_output)