I recommend using rails-assets instead.

Vendor the bower assets you want for Ruby on Rails. Inspired by bower-installer.

Add this line to your Rails application's Gemfile:

gem 'bower-vendor'

And then execute:

bundle
rails generate bower_vendor:configure

Add bower packages to the bower.json file in your Rails root as normal, then execute:

rails generate bower_vendor:install

To automatically vendor files specified by the bower package's main attribute to the appropriate vendor directory.

Files are vendored based on file extension under:

vendor/assets/(javascripts|stylesheets|images|media)/[package-name]

Currently supported file extensions are:

• javascripts: .js .coffee
• stylesheets: .css .scss .sass .less
• images: .gif .png .jpg .svg
• media: .* (everything else)

The following generators are available:

rails generate bower_vendor:install [options]

Options:
  [--update]                    # Update bower assets (ie - `bower update`)
  [--skip-git-ignore]           # Add vendored bower asset package directories to .gitignore
  [--force-clean]               # Clean vendored bower assets without prompting
  [--skip-clean]                # Skip cleaning vendored bower assets
  [--include-dev-dependencies]  # Include bower devDependencies
 
Runtime options:
  -f, [--force]    # Overwrite files that already exist
  -p, [--pretend]  # Run but do not make any changes
  -q, [--quiet]    # Suppress status output
  -s, [--skip]     # Skip files that already exist
 
Vendor bower assets based on bower.json

rails generate bower_vendor:clean [options]

Options:
  [--force]   # Delete vendored bower assets without prompting
  [--cached]  # Delete only the bower cache from tmp/bower_components
 
Runtime options:
  -p, [--pretend]  # Run but do not make any changes
  -q, [--quiet]    # Suppress status output
  -s, [--skip]     # Skip files that already exist
 
Cleans bower assets (CAUTION: Vendored asset directories for all bower packages will be deleted!)

Take the following example bower package:

{
  "name": "widgets",
  "repo": "pdf/widgets",
  "description": "Now with more widgets!",
  "version": "0.0.1",
  "main": [
    "build/dir/js/widgets.js",
    "build/dir/css/widgets.css",
  ]
}

Let's add widgets to our application's bower.json, like so:

{
  "dependencies": {
    "widgets": "~0.0.1"
  }
}

This is a contrived example, but it exists in the real world - if we were to install this using bower directly, we'd end up with some pretty ugly paths to reference in our application. It might look something like this:

components/widgets/build/dir/js/widgets.js
components/widgets/build/dir/js/widgets-super.js
components/widgets/build/dir/css/widgets.css
components/widgets/src/cruft/widgets.coffee
components/widgets/src/widgets.scss
components/widgets/.ilikedonuts

However, if we instead vendor the bower package by executing rails g bower_vendor:install --force-clean, we end up with just the following files added to our project space:

vendor/assets/javascripts/widgets/widgets.js
vendor/assets/stylesheets/widgets/widgets.css

Much nicer.

Simply require them in your application.js or application.css:

//= require 'widgets/widgets'

(Hat-tip to bower-installer for the inspiration)

If the bower package's main attribute does not include all the files you want to vendor (or files you want to omit from vendoring), you can override the vendored files using a sources attribute with a key of the package name, containing an array of source files to install, like so:

{
  "dependencies": {
    "widgets": "~0.0.1"
  },
  "sources": {
    "widgets": [
      "build/dir/js/widgets.js",
      "build/dir/js/widgets-super.js",
      "build/dir/css/widgets.css"
    ]
  }
}

Which will result in the following files being vendored:

vendor/assets/javascripts/widgets/widgets.js
vendor/assets/javascripts/widgets/widgets-super.js
vendor/assets/stylesheets/widgets/widgets.css

You can also override the destination path/filename, by using a hash of source paths to destinations instead of an array, like so:

{
  "dependencies": {
    "widgets": "~0.0.1"
  },
  "sources": {
    "widgets": {
      "build/dir/js/widgets.js": "widgets.js",
      "build/dir/js/widgets-super.js": "super/widgets-super.js",
      "build/dir/css/widgets.css": "my_widgets.css"
    }
  }
}

Resulting in the following:

vendor/assets/javascripts/widgets/widgets.js
vendor/assets/javascripts/widgets/super/widgets-super.js
vendor/assets/stylesheets/widgets/my_widgets.css

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request