Heroku buildpack: Typekit

This is the unofficial Heroku buildpack for apps that make use of Typekit.

If you've got an app, on Heroku, that uses Typekit for its fonts, you may have run into the issue whereby because you're not allowed to whitelist the *.herokuapp.com, that your fonts will not load on any of your apps, or review apps.

This package resolves this issue by checking, and updating, your Typekit account by whitelisting the app, or review app's, domain automatically when a new deployment is triggered.

The entire process is non-blocking, so, if for some reason it doesn't work, your site will still be deployed regardless. The buildpack will provide useful information for any errors, and I'm always available on Twitter for some one-to-one help.

There are two environment variables which are required for all the types of updates that are possible, so these should be added to all of your apps where you'd like to update the whitelisted domains automatically:

• TYPEKIT_API_KEY - This is a unique Typekit API Key, and can be generated on the account page.
• TYPEKIT_KIT_ID - This is the ID of the Typekit Kit you'd like to update the whitelisted domains of.

Once added, you should see something similar to the following:

Then, to enable this process on Review Apps, you'll need to update the app.json file, which should be in the root of your project, to add the following Heroku-specific and Typekit variables to the env list:

{
    "env": {
        "HEROKU_APP_NAME": {"required": true},
        "TYPEKIT_API_KEY": {"required": true},
        "TYPEKIT_KIT_ID": {"required": true}
    }
}

And the following to the buildpacks array, merging them with any existing properties if required:

{
    "buildpacks": [
        {
            "url": "https://github.com/jedkirby/heroku-buildpack-typekit"
        }
    ]
}

Because the pipeline stage apps work differetly to review apps, it means we need to manually add a environment variable to each of the stage apps. You will only need to do this if you're wanting to use the *.herokuapp.com sub-domain as apposed to a custom domain - if you're using a custom domain, you should add it to Typekit manually.

The following environment variable is required, and it should match the name that's been given to the pipeline stage app during creation:

• HEROKU_APP_NAME - Name given to the pipeline stage app.

You should have something similar to the below image, where you can see the pipeline stage app name is hdt-develop and the value of the HEROKU_APP_NAME variable is also hdt-develop:

Once you've followed the above Initial Setup and either one or both of the Review Apps / Pipeline guide(s) has been followed, you'll be good to either re-deploy an existing build, create a new review app, or push new code.

You should see something similar to the following image within the build log for a successful whitelist of the domain to Typekit:

The following information only applies if you're forking and hacking on this buildpack for your own purposes.

Please submit all pull requests against develop as the base branch, and use either feature or bugfix branches.

jedkirby/heroku-buildpack-typekit is licensed under the MIT license. See the LICENSE file for more details.