[2.0.0-beta4] Replace component() function by native Twig mechanisms?

Postponed because there is no clear solution now.

Jean: "We can override embed and include in Twig, but the props & slots are not easily available once they are transformed as variable in the Twig template."

Here is a starting point before reaching the problem of re-mapping props and slots from Twig Node to Drupal render array API.

And another issue is how to pass the render array to Twig for render throw `render_var`.

Time flies. We have other priorities for beta2

In a way, it is more or less what SDC is doing:

ComponentsTwigExtension is adding 2 twig functions:

• add_component_context which is adding the attribute Attribute object if missing
• validate_component_props which is executing the JSON schema validator

They are not supposed to be used by templates owner, there exists because ComponentNodeVisitor is printing those Twig functions on every template, which will be executed on rendering in this order:

1. attach_library
2. add_component_context
3. validate_component_props

In order to make the use of "template to template" Twig functions or tags (include and embed) more similar to the use of the Render API, leveraging the render element. For example, attach_library is used here because #attached is not executed.

Ok, i will give a try

First proposal for include: https://git.drupalcode.org/project/ui_patterns/-/merge_requests/262/diffs

It was the easy one. embed will be an harder challenge