distfile spec in variant?

[Joshua Root]

Darren Weber wrote:
> 
> Working on graphics/vtk-devel, which includes a doc variant with a large
> download and install time.
> 
> Is it possible to specify the distfile, fetch, extract, etc. entirely
> within the variant?  If the variant is not selected, the port should not
> download the documentation archive.

Use distfiles-append and another post-extract (if necessary) in the variant.

- Josh