getting python version used by another port

[Ryan Schmidt]

On Nov 28, 2011, at 10:21, Titus von Boxberg wrote:

> I'd like to fix
> http://trac.macports.org/ticket/31943
> 
> Short outline:
> Currently there is a port py26-hgsubversion.
> However, mercurial has moved to python27.
> 
> The idea given in the ticket is to get the python version used by mercurial
> instead of hardcoding it into the hgsubversion Portfile.
> Is this somehow possible?
> 
> Or is it necessary to create py27-hgsubversion and have py26-hgsubversion
> being replaced_by the former?

The answer to the question how to determine what version of python is used by the mercurial port is to read the mercurial portfile; it shows that it always uses python27 now, and doesn't have variants for selecting another python version. Corresponding to that fact, there should be only a py27-hgsubversion port, and it should always depend on python27 versions of things. Yes, using "replaced_by py27-hgsubversion" in the py26-hgsubversion port would be a nice touch.