Bower integration for your ruby apps.

Usage with Sprockets


Add bower to your application's Gemfile:

gem 'bower'

Rails 4 ships with an updated version of Sprockets that supports bower's component.json file. If you are running, Rails 3, then you need to require Sprockets 2.2.2.backport1:

gem 'sprockets', '2.2.2.backport1'

The gem includes a generator that sets up your project:

rails generate bower:install

This will install a .bowerrc file to your project's root directory that looks like this:

  "directory"  : "components",
  "json"       : "components/component.json",
  "endpoint"   : "",
  "searchpath" : []

Add your dependencies to components/component.json then use bower (bower install, etc.) as you would in any other project.

Non-Rails Projects

While offering less capability than when used in Rails' asset pipeline, you can still use the bower gem in a non-Rails project. Just require the gem and append the corresponding directory to Sprocket's load path:

require 'sprockets'
require 'bower'

environment =

How this gem differs from other techniques

For Rails apps, integrating bower components into lib/assets and/or vendor/assets seems like the wrong approach. Since bower can support multiple searchpaths, the need to make a distinction between external dependencies and frameworks does not exist. It can all be managed in once place. This gem takes a more opinionated approach and installs components to components/ in your project's root by default. You can always change it someplace


When used with Sprockets, you still need to use a require directive in order to require a component's files. This seems like something that should just work.


Pull requests welcome: fork, make a topic branch, commit (squash when possible) with tests and I'll happily consider.

Copyright (c) 2013 Steve Agalloco. See LICENSE for details.