How config auto-indent for x.html.haml.erb file

I would like to know how manage indentation inside file such as .html.haml.erb, I think that I need to configure the ERB in Settings => Code style but I can't find it. I read somewhere that you consider ERB close to XML, so I configured XML too but when I auto-indent my file it doesn't apply what I want.

How can I deal with that? Do I need to install a plugin or something?

Thanks.