Rails deprecation warning for vendor/plugins when I don't have any [duplicate]

Question

Possible Duplicate:
eliminating Rails 2.3-style plugins and deprecation warnings

I get the following error when I do a heroku run console:

$ heroku run console
Running `console` attached to terminal... up, run.1
DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out an d bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)

DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out an d bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5)

Connecting to database specified by DATABASE_URL
Loading production environment (Rails 3.2.8)
irb(main):001:0>

However, the only file I have in vendor/plugins is .gitkeep:

$ ls -lha vendor/plugins/
total 0
drwxr-xr-x    1 Scott    Administ        0 Sep  7 12:26 .
drwxr-xr-x    1 Scott    Administ        0 Sep  7 12:26 ..
-rw-r--r--    1 Scott    Administ        0 Sep  7 12:26 .gitkeep

I even tried removing the .gitkeep file and I still get the same deprecation warning. Do I have bad plugins? This is a relatively new Rails project.

Answer 1

Heroku injects old-style plugins to make your app work on their server (specifically to redirect logs to stdout, and to serve static assets from rails). Check the output from a git push... you'll see something like this

-----> Rails plugin injection
       Injecting rails_log_stdout
       Injecting rails3_serve_static_assets

So it's not something you've done, and nor is it anything to worry about! These will work just fine on Rails 3.x and Heroku will no doubt work something out when Rails 4 is a bit more mature.