## User Documentation for Yoga

This directory will contain the user, feature and API documentation for Yoga. The documentation will be hosted on GitHub pages.

### Contributing

See [CONTRIBUTING.md](./CONTRIBUTING.md) for details on how to add or modify content.

### Run the Site Locally

The requirements for running a GitHub pages site locally is described in [GitHub help](https://help.github.com/articles/setting-up-your-github-pages-site-locally-with-jekyll/#requirements). The steps below summarize these steps.

> If you have run the site before, you can start with step 1 and then move on to step 5.

1. Ensure that you are in the same directory where this `README.md` exists (e.g., it could be in `yoga/docs` on `master`, in the root of a `gh-pages` branch, etc). The below RubyGems commands, etc. must be run from there.

1. Make sure you have Ruby and [RubyGems](https://rubygems.org/) installed.

   > Ruby >= 2.2 is required for the gems. On the latest versions of Mac OS X, Ruby 2.0 is the
   > default. Use [Homebrew](http://brew.sh) and the `brew install ruby` command (or your
   > preferred upgrade mechanism) to install a newer version of Ruby for your Mac OS X system.

1. Make sure you have [Bundler](http://bundler.io/) installed.

    ```
    # may require sudo
    gem install bundler
    ```
1. Install the project's dependencies

    ```
    # run this in the 'docs' directory
    bundle install
    ```

    > If you get an error when installing `nokogiri`, you may be running into the problem described
    > in [this nokogiri issue](https://github.com/sparklemotion/nokogiri/issues/1483). You can
    > either `brew uninstall xz` (and then `brew install xz` after the bundle is installed) or
    > `xcode-select --install` (although this may not work if you have already installed command
    > line tools).

1. Run Jekyll's server.

    - On first runs or for structural changes to the documentation (e.g., new sidebar menu item), do a full build.

    ```
    bundle exec jekyll serve
    ```

    - For content changes only, you can use `--incremental` for faster builds.

    ```
    bundle exec jekyll serve --incremental
    ```

    > We use `bundle exec` instead of running straight `jekyll` because `bundle exec` will always use the version of Jekyll from our `Gemfile`. Just running `jekyll` will use the system version and may not necessarily be compatible.

    - To run using an actual IP address, you can use `--host=0.0.0.0`

    ```
    bundle exec jekyll serve --host=0.0.0.0
    ```

    This will allow you to use the IP address associated with your machine in the URL. That way you could share it with other people.

    e.g., on a Mac, you can your IP address with something like `ifconfig | grep "inet " | grep -v 127.0.0.1`.

1. Either of commands in the previous step will serve up the site on your local device at http://127.0.0.1:4000/ or http://localhost:4000.

### Updating the Bundle

The site depends on Github Pages and the installed bundle is based on the `github-pages` gem.
Occasionally that gem might get updated with new or changed functionality. If that is the case,
you can run:

```
bundle update
```

to get the latest packages for the installation.
