124 lines
4.6 KiB
Markdown
124 lines
4.6 KiB
Markdown
# SassC::Rails [](https://travis-ci.org/sass/sassc-rails) [](http://badge.fury.io/rb/sassc-rails)
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We all love working with Sass, but compilation can take quite a long time for larger
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codebases. This gem integrates the C implementation of Sass,
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[LibSass](https://github.com/sass/libsass), into the asset pipeline.
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In one larger project, this made compilation 4x faster:
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```
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# Using sassc-rails
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[1] pry(main)> Benchmark.bm { |bm| bm.report { Rails.application.assets["application.css"] } }
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user system total real
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1.720000 0.170000 1.890000 ( 1.936867)
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# Using sass-rails
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[1] pry(main)> Benchmark.bm { |bm| bm.report { Rails.application.assets["application.css"] } }
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user system total real
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7.820000 0.250000 8.070000 ( 8.106347)
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```
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This should essentially be a drop in alternative to [sass-rails](https://github.com/rails/sass-rails).
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## Inline Source Maps
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With SassC-Rails, it's also extremely easy to turn on inline source maps. Simply
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add the following configuration to your development.rb file:
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```ruby
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# config/environments/development.rb
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config.sass.inline_source_maps = true
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```
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After adding this config line, you may need to clear your assets cache
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(`rm -r tmp/cache/assets`), stop spring, and restart your rails server. You may
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also wish to disable line comments (`config.sass.line_comments = false`).
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Note, as indicated, these source maps are *inline*. They will not generate additional
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files or anything like that. Instead, they will be appended to the compiled
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application.css file.
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## LibSass Compatibility With Ruby Sass
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For a look at the compatibility between Ruby Sass and LibSass, check this
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[compatibility chart](http://sass-compatibility.github.io/) out.
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## Installation
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Add this line to your application's Gemfile:
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```ruby
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gem 'sassc-rails'
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```
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And then execute:
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$ bundle
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## Common Issues
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### Deployment to Heroku
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Due to LibSass compilation requirements, you must upgrade to the
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[Heroku Cedar-14 Stack](https://devcenter.heroku.com/articles/cedar-14-migration)
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in order to successfully install this gem.
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Upgrading to Cedar-14 is usually a painless process.
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### Installing alongside a gem that depends on Sass-Rails
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Libraries explicitly depending on Sass-Rails, such as ActiveAdmin, can cause
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conflicts with installation of SassC-Rails. While we have no built-in solution
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for this, please check out [this issue](https://github.com/sass/sassc-rails/issues/6)
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for a workaround.
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## Credits
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This gem is based on [sass-rails](https://github.com/rails/sass-rails), and
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is maintained by [Ryan Boland](https://ryanboland.com) and [awesome contributors](https://github.com/sass/sassc-rails/graphs/contributors).
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## Changelog
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- **2.1.2**
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- [Correct reference to SassC::Script::Value::String](https://github.com/sass/sassc-rails/pull/129)
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- **2.1.1**
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- [Fix Scaffolding](https://github.com/sass/sassc-rails/pull/119)
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- **2.1.0**
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- [JRuby support](https://github.com/sass/sassc-rails/pull/113)
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- [SCSS / SASS scaffolding](https://github.com/sass/sassc-rails/pull/112)
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- **2.0.0**
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- [Drop support for Sprockets 2](https://github.com/sass/sassc-rails/pull/109)
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- [Remove dependency on Ruby Sass](https://github.com/sass/sassc-rails/pull/109)
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- **1.3.0**
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- [Silence Sprockets deprecation warnings](https://github.com/sass/sassc-rails/pull/76)
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- [Sprockets 4 compatibility](https://github.com/sass/sassc-rails/pull/65)
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- **1.2.1**
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- Bump SassC (and thus LibSass) version
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- **1.2.0**
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- [Support sprockets-rails 3](https://github.com/sass/sassc-rails/pull/41)
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- [Only depend on Railties instead of full Rails](https://github.com/sass/sassc-rails/pull/52)
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- **1.1.0**
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- Moved under the official sass organization!
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- [Source line comments](https://github.com/sass/sassc-rails/pull/24) (`app.config.sass.line_comments`)
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- [Prevent sass-rails railtie from running](https://github.com/sass/sassc-rails/pull/34)
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- [CSS compression may be disabled in test mode](https://github.com/sass/sassc-rails/issues/33). Special thanks to [this Sass-Rails PR](https://github.com/rails/sass-rails/pull/338) for inspiration.
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- **1.0.0**
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- Initial Release
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- Add support for inline source maps
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- Support compression in the way that Sass-Rails handles it
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## Contributing
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1. Fork it ( https://github.com/sass/sassc-rails/fork )
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1. Create your feature branch (`git checkout -b my-new-feature`)
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1. Commit your changes (`git commit -am 'Add some feature'`)
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1. Add Tests
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1. Push to the branch (`git push origin my-new-feature`)
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1. Create a new Pull Request
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