1 files changed, 42 insertions, 0 deletions
diff --git a/railties/lib/rails/commands/rake_proxy.rb b/railties/lib/rails/commands/rake_proxy.rb
new file mode 100644
index 0000000000..13a9aef694
--- /dev/null
+++ b/railties/lib/rails/commands/rake_proxy.rb
@@ -0,0 +1,42 @@
+require 'rake'
+
+module Rails
+  module RakeProxy #:nodoc:
+
+    RAKE_TASKS_HELP_MESSAGE = <<-EOT
+In addition to those, you can run the rake tasks as rails commands:
+
+    EOT
+
+    private
+
+      def write_rake_tasks_help_message
+        puts RAKE_TASKS_HELP_MESSAGE
+      end
+
+      def write_rake_tasks
+        width = rake_tasks.map { |t| t.name_with_args.length }.max || 10
+        rake_tasks.each do |t|
+          printf("#{Rake.application.name} %-#{width}s  # %s\n", t.name_with_args, t.comment)
+        end
+      end
+
+      def rake_tasks
+        return @rake_tasks if defined?(@rake_tasks)
+
+        require_application_and_environment!
+        Rake::TaskManager.record_task_metadata = true
+        Rake.application.instance_variable_set(:@name, 'rails')
+        Rails.application.load_tasks
+        @rake_tasks = Rake.application.tasks.select(&:comment)
+      end
+
+      def invoke_rake
+        Rake.application.standard_exception_handling do
+          Rake.application.init('rails')
+          Rake.application.load_rakefile
+          Rake.application.top_level
+        end
+      end
+  end
+end