Add possibility to use "ref" for links within front-matter

[stp-ip]

Is this a BUG REPORT or FEATURE REQUEST?:
feature

What happened:
Currently hugo reference style linking within buttons etc. isn't possible.

What you expected to happen:
Enable "ref" style links even in front matter.

Anything else we need to know?:
This should also make link breakage more noticeable.

[mpourismaiel]

I don't really understand. Could you please elaborate?

[stp-ip]

Currently we only allow relative or absolute links within fragments.
We recently switched within our docs to using "ref" such as {{< ref "fragment.md" >}} instead. That way moving content doesn't always break the link and also if it breaks hugo has the ability to warn the user.
This issue is about adding support of ref along the lines of:

[[buttons]]
  text = "Example"
  url = "{{< ref "other-example.md" >}}"
  color = "dark"

[mpourismaiel]

Is this something we want for all the fragments?

[stp-ip]

I would say yes.