With Rails 3.1.1 changes to the asset pipeline we needed to change how to configure asset_sync.

• Rails will not load config/initializers/asset_sync.rb
• So we added an initializer to the asset_sync gem itself and tried to force the load of an initializer in Rails.root/config/initializers/asset_sync.rb (this feels wrong and also didn't work)
• Even with :group => :assets on the initializer in asset_sync/engine, it doesn't seem to be run

Alternatives.

Tried the following and they all work, locally and when pushed to heroku (and heroku run rake assets:precomile is ran).

There is still a nasty error now on push to heroku because the precompile task doesn't work. Haven't checked but I'm guessing ENV variables still aren't there on push.

  -----> Preparing app for Rails asset pipeline
         Running: rake assets:precompile
         /usr/local/bin/ruby /tmp/build_1ajde6o93skek/vendor/bundle/ruby/1.9.1/bin/rake assets:precompile:nondigest RAILS_ENV=production RAILS_GROUPS=assets
         rake aborted!
         Aws access key can't be blank, Aws access secret can't be blank, Aws bucket can't be blank
   
         Tasks: TOP => assets:precompile
         (See full trace by running task with --trace)

Also heroku doesn't seem to run the same tasks as when run from heroku run or maybe it eschews the output of the first task.

~ $ bundle exec rake assets:precompile
/usr/local/bin/ruby /app/vendor/bundle/ruby/1.9.1/bin/rake assets:precompile:all RAILS_ENV=staging RAILS_GROUPS=assets
/usr/local/bin/ruby /app/vendor/bundle/ruby/1.9.1/bin/rake assets:precompile:nondigest RAILS_ENV=staging RAILS_GROUPS=assets

Not sure but this could be related.

YAML

• Purely relying on config/asset_sync.yml works fine (with hardcoded or ENV variables... as the yml file can have erb in it).

put contents of an initializer in config/application.rb

• Putting what should be generated into config/initializers directly into application.rb is actually now loaded during the assets:precompile task.

Use config.asset_sync

Playing around with this, we added a railtie to add a method to the Rails App config.

This now works also. Should be able to put this in the different config/environments/* files and override from there.

config.asset_sync.aws_access_key = ENV['AWS_ACCESS_KEY']
config.asset_sync.aws_access_secret = ENV['AWS_ACCESS_SECRET']
config.asset_sync.aws_bucket = ENV['AWS_BUCKET']
config.asset_sync.aws_region = "eu-west-1"