This is the same issue as https://www.drupal.org/node/1252178 for D8. This request is not simply in order to bring us in feature parity with D8 - it's been mentioned in various issues like #189, #214, #801 and latest in #988. It was listed in #211 but dropped as N/A back then. Reconsider?
GitHub Issue #:
1009
Recent comments
In a blog post titled "Github Tips and Tricks for Contrib Maintainers", I'd like to see some of the following topics: When is the README sufficient for documentation? When should...
Github Tips and Tricks for Contrib Maintainers
Thanks Alejandro. That was the clues I needed.
Ubercart - Programmatically add product to cart and straight to Checkout
Have you tried uc_cart_add_item()? You need to provide the nid of the product. Then you can use backdrop_goto('cart/checkout'); to send the user to the checkout screen. uc_cart_add_item...
Ubercart - Programmatically add product to cart and straight to Checkout