jeql - Jekyll with GraphQL

Installation

Add this to to your site's Gemfile:

  gem 'jeql'

Add the following to your site's config file (usually _config.yml):

  plugins:
    - jeql

After this run bundle install within your site's directory.

Usage

GraphQL endpoints

You need to define graphQL endpoints within your Jekyll config. Within the key jeql list all your providers in the format:

jeql:
  provider_name:
    url: "API_ENDPOINT_URL"
    header:
      Authorization: "HTTP AUTHORIZATION HEADER - SECRET"

An example config to access the graphQL - API from GitHub would look like this:

jeql:
  github:
    url: "https://api.github.com/graphql"
    header:
      Authorization: "bearer my-secret-header"

Attention: Make sure to not commit authorization tokens in a public repository. Instead make use of Jekyll's multiple-config-file feature and add these tokens to a private config file which is not checked into your version control system.

GraphQL queries

Queries in jeql are specified as json files and live within the _graphql directory of your Jekyll site.

An example query file would have the following content:

{
  "query": "query { viewer { name repositories(last: 3){ nodes { name }} }}"
}

and would e.g. be stored as /_graphql/last_touched_repositories.json.

Using it in liquid

After all this setup has been done you can now use the graphql block tag in your template files. The graphql tag expects two parameters:

• endpoint
• query

endpoint is the name of the graphQL - API endpoint as you have it defined in your Jekyll config file. query is the name of the file under _graphql in which you stored the graphQL query that should be executed against the endpoint (without the .json extension).

An example which uses the settings and query from the paragraphs above would look like this:

{% graphql endpoint: "github", query: "last_touched_repositories" %}
...
{% endgraphql %}

Between the opening and closing graphql tag you have access to the variable data which will contain the response of the graphQL query:

<ul>
{% graphql endpoint: "github", query: "last_touched_repositories" %}
  {% for repo in data["viewer"]["repositories"]["nodes"] %}
    <li>{{repo["name"]}}</li>
  {% endfor %}
{% endgraphql %}
</ul>

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/Crunch09/jeql. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the jeql project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

Inspirations

This gem was inspired by github-metadata and jekyll-seo-tag.