[Feature] Support for annotate_template_file_names

[tom-lord]

There is a new (unreleased) feature in the rails master branch: config.action_view.annotate_template_file_names.

However, this only adds support for erb templates.

It would be nice to prepare support for this feature, which will likely be shipped with rails 6.1.0, in the haml-rails library too.
The HAML template engine generates the output here, but presumably it should be this library's responsibility to read the rails-specific configuration parameter (so generated HTML appends/prepends the rendered partial name).

[ConfusedVorlon]

just to add

• this feature did ship in 6.1
• It is awesome!
• I just switched to haml (which I love) and losing this annotation is the first significant downside

I'd love to see support added in haml.

thank you

[HamptonMakes]

I think we can definitely prioritize this!

[vpereira]

any update on that?

[dmarcoux]

There's an open PR for this: haml/haml#1050.

Since this issue's creation, the configuration was renamed to annotate_rendered_view_with_filenames in Rails a673ce6.

[dmarcoux]

The PR I linked in my previous comment is now merged, so I believe this is now supported.

[ConfusedVorlon]

Awesomeness. Thank you :)

[HamptonMakes]

https://github.com/haml/haml/releases/tag/v5.2.2