1 files changed, 34 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..f7d5df6b2f
--- /dev/null
+++ b/railties/lib/rails/commands/rake_proxy.rb
@@ -0,0 +1,34 @@
+require 'rake'
+require 'active_support'
+
+module Rails
+  module RakeProxy #:nodoc:
+    private
+      def run_rake_task(command)
+        ARGV.unshift(command) # Prepend the command, so Rake knows how to run it.
+
+        Rake.application.standard_exception_handling do
+          Rake.application.init('rails')
+          Rake.application.load_rakefile
+          Rake.application.top_level
+        end
+      end
+
+      def rake_tasks
+        return @rake_tasks if defined?(@rake_tasks)
+
+        ActiveSupport::Deprecation.silence do
+          require_application_and_environment!
+        end
+
+        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 formatted_rake_tasks
+        rake_tasks.map { |t| [ t.name_with_args, t.comment ] }
+      end
+  end
+end