Bower support for Rails projects. Dependency file is bower.json in Rails root dir or Bowerfile if you use DSL. Check out changelog for the latest changes and releases.

Requirements

• node (on github)
• bower (>= 0.10.0) installed with npm

Install

in Gemfile

  gem "bower-rails", "~> 0.6.1"

##JSON configuration

Bower-rails now supports the standard bower package format out-of-the-box. Simply place your bower.json file the Rails root directory to start. Using the standard format will default all bower components to be installed under the vendor directory.

To install dependencies into both lib and vendor directories, run the initializer to generate a custom bower.json:

  rails g bower_rails:initialize

This will generate a special bower.json that combines two standard bower packages into one. Simply specify your dependencies under each folder name to install them into the corresponding directories.

example bower.json file

{
   "lib": {
    "name": "bower-rails generated lib assets",
    "dependencies": {
      "threex"      : "[email protected]:rharriso/threex.git",
      "gsvpano.js"  : "https://github.com/rharriso/GSVPano.js/blob/master/src/GSVPano.js"
    }
  },
  "vendor": {
    "name": "bower-rails generated vendor assets",
    "dependencies": {
      "three.js"    : "https://raw.github.com/mrdoob/three.js/master/build/three.js"
    }
  }
}

##Ruby DSL configuration

The Ruby DSL configuration is a Bowerfile at the project's root with DSL syntax similar to Bundler.

Example Bowerfile

By default assets are put to ./vendor/assets/bower_components directory:

# Puts to ./vendor/assets/bower_components
asset "backbone"
asset "moment"

But the default value can be overridden by assets_path method:

assets_path "assets/my_javascripts"

# Puts to ./vendor/assets/my_javascripts/bower_components
asset "backbone"
asset "moment"

And finally, the assets_path method can be overridden by an option in a group call:

assets_path "assets/javascript"

# Puts files under ./vendor/assets/js/bower_components
group :vendor, :assets_path => "assets/js"  do
  asset "jquery"            # Assummes it's latests
  asset "backbone", "1.2"
end

# Puts files under ./lib/assets/javascript/bower_components
group :lib do
  asset "jquery"
  asset "backbone", "1.2"
end

NOTE: Available groups are :lib and :vendor. Others are not allowed according to the Rails convention. NOTE: All the assets should be stored in /assets subdirectory so putting it under ./vendor/js directory is unavailable

##Rake tasks

Once you are done with bower.json or Bowerfile you can run

• rake bower:install to install js components
• rake bower:install:force to install with force option
• rake bower:update to update js components
• rake bower:update:prune to update components and uninstall extraneous packages
• rake bower:list to list all packages
• rake bower:resolve to resolve relative asset paths in components

##Bower Configuration

If you provide a .bowerrc in the rails project root, bower-rails will use it for bower configuration. Some .bowerrc options are not supported: directory, cwd, and interactive. Bower-rails will ignore the directory property and instead will use the automatically generated asset path.

###Bower Installation

Bower should be installed using npm. Bower can be installed globally (with $ npm install -g bower) or in node_modules in the root directory of your project.

##Relative asset paths

Some bower components (eg. Bootstrap) have relative urls in the CSS files for imports, images, etc. Rails prefers using helper methods for linking to assets within CSS. Relative paths can cause issues when assets are precompiled for production.

Before the rake assets:precompile task is run, the bower assets will be reinstalled with the relative paths replaced with calls to asset_path so that all asset links work in production.