http2-rails.rb

class SomeController < ApplicationController
  before_action :add_http_preload
  
  private
  
  def add_http_preload
    # Always add a Link header to responses to this controller
    http_preload script: "application.js", style: "application.css"
    http_preload "myfont.woff", as: :font, push: false
    # TODO: How should crossorigin work?
    # Generated Link headers:
    # Link: </assets/application.css>; rel=preload; as=style
    # Link: </assets/application.js>; rel=preload; as=script
    # Link: </assets/myfont.woff>; rel=preload; as=font; nopush
  end
end

👍

How about just preload with default option for "push: on" and allow override for "off" (i.e. nopush).

preload 'script.js'
preload 'other/thing', push: false

The above maps cleanly to Preload semantics.

👍 definitely would need a push option.