# Opal Sprockets _Adds sprockets support for [Opal](http://opalrb.org)._ ## Installation Add to your `Gemfile`: ```ruby gem "opal-sprockets" ``` ### A note on the version number The version number is an attempt to keep track and support different combinations of both opal and sprockets without cluttering the code with giant `if`s and conditional requires. The structure is roughly as follows: `..` For example version `0.4.1.0.11.0.rc1.3.1` is build taking into account the following components: BASE_VERSION = '0.4.1' OPAL_VERSION = '0.11.0.rc1' SPROCKETS_VERSION = '3.1' ## Usage Sprockets uses a set of load paths to resolve dependencies. This gem extends sprockets to provide opal load paths to sprockets. `opal-sprockets` provides a template processor for all files with `.rb` or `.opal` extensions. ```ruby #= require opal puts "opal running in sprockets!" ``` ### Improved require support By default, sprockets will examine your code for processor directive comments to handle requires, e.g. `#= require opal`. Opal takes this one step futher by extending the opal processor to automatically detect and register any `require` call made inside your ruby code: ```ruby require "opal" require "opal-jquery" puts "opal-jquery is now available!" ``` Opal cannot require files at runtime, so this trick allows ruby code to use the nicer ruby syntax for requiring dependencies. ## Example Sprockets uses a load path for code files, so make a simple `app/` directory with some code inside `app/application.rb`: ```ruby # app/application.rb require "opal" puts "hello, world" ``` The opal corelib and runtime can be included in your app simply by adding `require "opal"`. We also need an html file to test the application with, so add `index.html`: ```html ``` ### Running Application `opal-sprockets` comes with a simple `Server` class that can be used to easily configure applications inside `config.ru`: ```ruby # config.ru require 'bundler' Bundler.require run Opal::Sprockets::Server.new { |s| s.append_path 'app' s.main = 'application' # This can be used to provide a custom index file. # s.index_path = 'my_index.erb' } ``` This just adds the `app/` directory to the load path, and tells sprockets that `application.rb` will be the main file to load. Now just run the rack app: ``` $ bundle exec rackup ``` And then visit `http://127.0.0.1:9292` in any browser. ### Source Maps `opal-sprockets` will create source maps for all assets by default. You can disable this with: ```ruby Opal::Config.source_map_enabled = false ``` ## License (The MIT License) Copyright (C) 2013 by Adam Beynon Copyright (C) 2013 by Elia Schito Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.