The sprockets-rails plugin sets up your Rails application for use with Sprockets. To install it, first install the sprockets RubyGem, then check out a copy of the sprockets-rails repository into your vendor/plugins/ directory. When you run the bundled install.rb script, sprockets-rails will create two new directories in your application and copy a configuration file into your config/ directory.
sprockets-rails includes a controller named SprocketsController that renders your application's Sprockets concatenation. When caching is enabled, e.g. in production mode, SprocketsController uses Rails page caching to save the concatenated output to public/sprockets.js the first time it is requested. When caching is disabled, e.g. in development mode, SprocketsController will render a fresh concatenation any time a source file changes.
To source Sprockets' JavaScript concatenation from your HTML templates, use the provided sprockets_include_tag helper.
sprockets-rails also includes a set of Rake tasks for generating the concatenation (rake sprockets:install_script) and installing provided assets (rake sprockets:install_assets). Run sprockets:install_assets any time you add or update a Sprockets plugin in your application. Add sprockets:install_script as a Capistrano post-deploy hook to generate the Sprockets concatenation on your servers automatically at deploy time.
Here's a walkthrough of the installation process:
-
gem install --remote sprockets -
script/plugin install git://github.com/sstephenson/sprockets-rails.gitYou now have
app/javascripts/andvendor/sprockets/directories in your application, as well as aconfig/sprockets.ymlfile. -
Edit your
config/routes.rbfile to add routes forSprocketsController:ActionController::Routing::Routes.draw do |map| # Add the following line: SprocketsApplication.routes(map) ... end -
Move your JavaScript source files from
public/javascripts/intoapp/javascripts/. All files in all subdirectories ofapp/javascripts/will be required by Sprockets in alphabetical order, with the exception ofapp/javascripts/application.js, which is required before any other file. (You can change this behavior by editing thesource_filesline ofconfig/sprockets.yml.) -
Adjust your HTML templates to call
<%= sprockets_include_tag %>instead of<%= javascript_include_tag ... %>.
Once sprockets-rails is installed, you can check out Sprockets plugins into the vendor/sprockets/ directory. By default, sprockets-rails configures Sprockets' load path to search vendor/sprockets/*/src/, as well as vendor/plugins/*/javascripts/. This means that the javascripts/ directories of Rails plugins are automatically installed into your Sprockets load path.
Copyright © 2009 Sam Stephenson.
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