Apparently there's some dlang action in spacemacs

[Vladimir Panteleev via Digitalmars-d]

On Friday, 14 October 2016 at 06:23:15 UTC, Martin Tschierschke 
wrote:
> Is there a good (emacs) mode for editing the vibe.d diet 
> templates?

Not that I know of, but you could try your luck with 
https://github.com/brianc/jade-mode or 
https://github.com/ananthakumaran/jade-mode.