Bootstrap uses [Grunt](http://gruntjs.com) for its CSS and JavaScript build system and Jekyll for the written documentation. Our Gruntfile includes convenient methods for working with the framework, including compiling code, running tests, and more.
To use our Gruntfile and run our documentation locally, you'll need a copy of Bootstrap's source files, Node, and Grunt. Follow these steps and you should be ready to rock:
1. [Download and install Node](https://nodejs.org/download), which we use to manage our dependencies.
2. Install the Grunt command line tools, `grunt-cli`, with `npm install -g grunt-cli`.
3. Navigate to the root `/bootstrap` directory and run `npm install` to install our local dependencies listed in [package.json](https://github.com/twbs/bootstrap/blob/master/package.json).
4. [Install Ruby][install-ruby], install [Bundler][gembundler] with `gem install bundler`, and finally run `bundle`. This will install all Ruby dependencies, such as Jekyll and Sass linter.
**Unfamiliar with npm? Don't have node installed?** That's a-okay. npm stands for [node packaged modules](http://npmjs.com/) and is a way to manage development dependencies through node.js. [Download and install node.js](https://nodejs.org/download/) before proceeding.
| `grunt` | Run `grunt` to run tests locally and compile the CSS and JavaScript into `/dist`. **Uses [Sass](http://sass-lang.com/) and [UglifyJS](http://lisperator.net/uglifyjs/).** |
| `grunt dist` | `grunt dist` creates the `/dist` directory with compiled files. **Uses [Sass](http://sass-lang.com/) and [UglifyJS](http://lisperator.net/uglifyjs/).** |
| `grunt test` | Runs [JSHint](http://jshint.com) and [QUnit](http://qunitjs.com/) tests headlessly in [PhantomJS](http://phantomjs.org/) (used for CI). |
| `grunt docs` | Builds and tests CSS, JavaScript, and other assets which are used when running the documentation locally via `jekyll serve`. |
| `grunt watch` | This is a convenience method for watching just Sass files and automatically building them whenever you save. |
Bootstrap will be compiled with [libsass][libsass] by default, but you can opt into traditional Ruby Sass by setting the `TWBS_SASS` environment variable. Two options are supported:
Running our documentation locally requires the use of Jekyll, a decently flexible static site generator that provides us basic includes, Markdown-based files, templates, and more. Here's how to get it started:
1. Run through the [tooling setup](#tooling-setup) above to install Jekyll (the site builder) and Rouge (our syntax highlighter).
- **Windows users:** Read [this unofficial guide](http://jekyll-windows.juthilo.com/) to get Jekyll up and running without problems.
2. From the root `/bootstrap` directory, run `jekyll serve` in the command line.
3. Open <http://localhost:9001> in your browser, and voilà.
Learn more about using Jekyll by reading its [documentation](http://jekyllrb.com/docs/home/).
Should you encounter problems with installing dependencies or running Grunt commands, uninstall all previous dependency versions (global and local). Then, rerun `npm install`.
