Update generators to use thor 0.13.6 with simpler source_root handling.

actionmailer/lib/rails/generators/mailer/mailer_generator.rb

@@ -1,13 +1,11 @@
 module Rails
   module Generators
     class MailerGenerator < NamedBase
+      source_root File.expand_path("../templates", __FILE__)
+
       argument :actions, :type => :array, :default => [], :banner => "method method"
       check_class_collision
 
-      def self.source_root
-        File.expand_path("../templates", __FILE__)
-      end
-
       def create_mailer_file
         template "mailer.rb", File.join('app/mailers', class_path, "#{file_name}.rb")
       end

activerecord/lib/rails/generators/active_record.rb

@@ -8,16 +8,12 @@ module ActiveRecord
     class Base < Rails::Generators::NamedBase #:nodoc:
       include Rails::Generators::Migration
 
-      def self.source_root
-        @_ar_source_root ||= begin
-          if base_name && generator_name
-            File.expand_path(File.join(base_name, generator_name, 'templates'), File.dirname(__FILE__))
-          end
-        end
+      # Set the current directory as base for the inherited generators.
+      def self.base_root
+        File.dirname(__FILE__)
       end
 
       # Implement the required interface for Rails::Generators::Migration.
-      #
       def self.next_migration_number(dirname) #:nodoc:
         next_migration_number = current_migration_number(dirname) + 1
         if ActiveRecord::Base.timestamped_migrations

railties/lib/rails/generators/base.rb

@@ -20,24 +20,19 @@ module Rails
 
       add_runtime_options!
 
-      # Automatically sets the source root based on the class name.
-      #
-      def self.source_root
-        @_rails_source_root ||= begin
-          if base_name && generator_name
-            File.expand_path(File.join(base_name, generator_name, 'templates'), File.dirname(__FILE__))
-          end
-        end
+      # Returns the source root for this generator using default_source_root as default.
+      def self.source_root(path=nil)
+        @_source_root = path if path
+        @_source_root ||= default_source_root
       end
 
       # Tries to get the description from a USAGE file one folder above the source
       # root otherwise uses a default description.
-      #
       def self.desc(description=nil)
         return super if description
-        usage = File.expand_path(File.join(source_root, "..", "USAGE"))
+        usage = source_root && File.expand_path("../USAGE", source_root)
 
-        @desc ||= if File.exist?(usage)
+        @desc ||= if usage && File.exist?(usage)
           File.read(usage)
         else
           "Description:\n    Create #{base_name.humanize.downcase} files for #{generator_name} generator."
@@ -47,7 +42,6 @@ module Rails
       # Convenience method to get the namespace from the class name. It's the
       # same as Thor default except that the Generator at the end of the class
       # is removed.
-      #
       def self.namespace(name=nil)
         return super if name
         @namespace ||= super.sub(/_generator$/, '').sub(/:generators:/, ':')
@@ -200,7 +194,6 @@ module Rails
       end
 
       # Make class option aware of Rails::Generators.options and Rails::Generators.aliases.
-      #
       def self.class_option(name, options={}) #:nodoc:
         options[:desc]    = "Indicates when to generate #{name.to_s.humanize.downcase}" unless options.key?(:desc)
         options[:aliases] = default_aliases_for_option(name, options)
@@ -208,14 +201,27 @@ module Rails
         super(name, options)
       end
 
+      # Returns the default source root for a given generator. This is used internally
+      # by rails to set its generators source root. If you want to customize your source
+      # root, you should use source_root.
+      def self.default_source_root
+        return unless base_name && generator_name
+        path = File.expand_path(File.join(base_name, generator_name, 'templates'), base_root)
+        path if File.exists?(path)
+      end
+
+      # Returns the base root for a common set of generators. This is used to dynamically
+      # guess the default source root.
+      def self.base_root
+        File.dirname(__FILE__)
+      end
+
       # Cache source root and add lib/generators/base/generator/templates to
       # source paths.
-      #
       def self.inherited(base) #:nodoc:
         super
 
-        # Cache source root, we need to do this, since __FILE__ is a relative value
-        # and can point to wrong directions when inside an specified directory.
+        # Invoke source_root so the default_source_root is set.
         base.source_root
 
         if base.name && base.name !~ /Base$/

railties/lib/rails/generators/rails/generator/templates/%file_name%_generator.rb.tt

@@ -1,5 +1,3 @@
 class <%= class_name %>Generator < Rails::Generators::NamedBase
-  def self.source_root
-    @source_root ||= File.expand_path('../templates', __FILE__)
-  end
+  source_root File.expand_path('../templates', __FILE__)
 end

railties/railties.gemspec

@@ -20,7 +20,7 @@ Gem::Specification.new do |s|
   s.has_rdoc = false
 
   s.add_dependency('rake',          '>= 0.8.3')
-  s.add_dependency('thor',          '~> 0.13.5')
+  s.add_dependency('thor',          '~> 0.13.6')
   s.add_dependency('activesupport', version)
   s.add_dependency('actionpack',    version)
 end

railties/test/generators/actions_test.rb

@@ -209,7 +209,7 @@ class ActionsTest < Rails::Generators::TestCase
 
   def test_readme
     run_generator
-    Rails::Generators::AppGenerator.expects(:source_root).returns(destination_root)
+    Rails::Generators::AppGenerator.expects(:source_root).times(2).returns(destination_root)
     assert_match(/Welcome to Rails/, action(:readme, "README"))
   end