internal-to-Portfile variable during upgrade?

[Joshua Root]

On 2010-7-9 00:56 , Michael Dickens wrote:
> On Thu, 08 Jul 2010 16:07 +0200, "Rainer Müller" <raimue at macports.org>
> wrote:
>> Ahhhh, sorry, I forgot one important thing... variants are evaluated
>> *after* the rest of the Portfile (in order to resolve conflicts and
>> requires first). So this configure.cmd is evaluated before the variants
>> and therefore qt_dir is not set to what you expected.
>>
>> If configure.cmd is all you want to change it would be way easier to
>> just use this inside the variant directly.
> 
> Unfortunately for most ports, ${qt_dir} is needed for multiple tasks --
> from setting the configure.cmd to doing reinplace in post-destroot to
> ...  so, I need it to be set correctly -before- those other tasks are
> executed.  Any further ideas?  I'll also keep playing around to see what
> I can come up with. - MLD

Worst case you can just use "if {[variant_isset foo]}", but everything
you mentioned above gets run after variants are evaluated.

- Josh