Use https://github.com/btford/ngmin in the Rails asset pipeline.

Add this line to your application's Gemfile:

gem 'ngmin-rails'

And then execute:

$ bundle

That's it! ngmin-rails integrates seamlessly into the Rails asset pipeline; your JavaScript or CoffeeScript assets will automatically be run through the ngmin pre-minifier.

The ngmin-rails version number mirrors the version number for the version of ngmin that is bundled with it.

• Q: I installed ngmin-rails, but my assets aren't getting processed with ngmin.

  A: Remember to delete tmp/cache/assets or touch all the related asset files so that the cached versions get regenerated. If you've precompiled your assets into public/assets, you'll need to re-precompile them.

The actual ngmin project is bundled into this gem via Browserify. You can update to the latest version of ngmin via Rake:

rake ngmin:build

There is a Rails 3 application bundled in example/ that you can use to test the asset pipeline integration. Don't forget to remove tmp/cache/assets after upgrading to the latest version of ngmin.