Require missing libraries and check for defined ActionController constant so ActionView can be used standalone

actionpack/lib/action_controller/mime_type.rb

@@ -1,3 +1,5 @@
+require 'set'
+
 module Mime
   SET              = []
   EXTENSION_LOOKUP = Hash.new { |h, k| h[k] = Type.new(k) unless k.blank? }

actionpack/lib/action_view/helpers/sanitize_helper.rb

@@ -1,5 +1,14 @@
 require 'action_view/helpers/tag_helper'
-require 'html/document'
+
+begin
+  require 'html/document'
+rescue LoadError
+  html_scanner_path = "#{File.dirname(__FILE__)}/../../action_controller/vendor/html-scanner"
+  if File.directory?(html_scanner_path)
+    $:.unshift html_scanner_path
+    require 'html/document'
+  end
+end
 
 module ActionView
   module Helpers #:nodoc:

actionpack/lib/action_view/helpers/text_helper.rb

@@ -1,5 +1,14 @@
 require 'action_view/helpers/tag_helper'
-require 'html/document'
+
+begin
+  require 'html/document'
+rescue LoadError
+  html_scanner_path = "#{File.dirname(__FILE__)}/../../action_controller/vendor/html-scanner"
+  if File.directory?(html_scanner_path)
+    $:.unshift html_scanner_path
+    require 'html/document'
+  end
+end
 
 module ActionView
   module Helpers #:nodoc:

actionpack/lib/action_view/renderable.rb

@@ -72,7 +72,7 @@ module ActionView
         end_src
 
         begin
-          logger = Base.logger
+          logger = defined? ActionController && Base.logger
           logger.debug "Compiling template #{render_symbol}" if logger
 
           ActionView::Base::CompiledTemplates.module_eval(source, filename, 0)

actionpack/lib/action_view/renderable_partial.rb

@@ -16,7 +16,11 @@ module ActionView
     memoize :counter_name
 
     def render(view, local_assigns = {})
-      ActionController::Base.benchmark("Rendered #{path_without_format_and_extension}", Logger::DEBUG, false) do
+      if defined? ActionController
+        ActionController::Base.benchmark("Rendered #{path_without_format_and_extension}", Logger::DEBUG, false) do
+          super
+        end
+      else
         super
       end
     end

actionpack/lib/action_view/template.rb

@@ -1,3 +1,5 @@
+require 'action_controller/mime_type'
+
 module ActionView #:nodoc:
   class Template
     extend TemplateHandlers