We use Jekyll to build the site.

If you are working on the site, you will want to install and run a local copy of it.

Start by cloning the website recursively to pull in all submodules:

git clone git@github.com:facebook/flow.git

In order to use Jekyll, you will need to have Ruby installed. macOS comes pre-installed with Ruby, but you may need to update RubyGems (via gem update --system). Otherwise, RVM and rbenv are popular ways to install Ruby.

• Ruby (version >= 1.8.7)
• RubyGems (version >= 1.3.7)
• Bundler

The version of the Pygment syntax highlighter used by Jekyll requires Python 2.7.x (not 3.x). macOS comes pre-installed with Python 2.7, but you may need to install it on other OSs.

• Python (version 2.7.x)

Once you have RubyGems and installed Bundler (via gem install bundler), use it to install the dependencies:

$ cd website
$ bundle install

Use Jekyll to serve the website locally (by default, at http://localhost:8080):

$ cd website
$ make
$ open http://127.0.0.1:8080/