Is it possible to specify variant as part of depends_lib?

[Craig Treleaven]

> On Apr 18, 2018, at 7:52 PM, Edward Maros <emaros at ligo.caltech.edu> wrote:
> 
> On 4/18/18 3:39 PM, Ryan Schmidt wrote:
>> On Apr 18, 2018, at 12:39, Edward Maros wrote:
>> 
>>> I have a package (gds) that has a build requirement on port root5 with
>>> the variant +python27.
>>> 
>>> Currently the buildbot system will not build the gds package because it
>>> installs the root5 package with only default variants.
>>> 
>>> Any ideas on how to get the variant passed (at least for the buildbot
>>> system) so I can address any issues related to the gds package?
>> 
>> You can't specify variants in dependencies.
>> See https://trac.macports.org/ticket/126
>> 
>> You can use the require_active_variants procedure from the
>> active_variants 1.1 portgroup. There are many portfiles using this
>> procedure that you can use as examples, and take a look at the
>> documentation in the comments at the top of this file:
>> 
>> https://github.com/macports/macports-ports/blob/master/_resources/port1.0/group/active_variants-1.1.tcl
> This allows me to check if the variant is active, but does not force the
> buildbot to install the package with the required variant. I may be
> misunderstanding things and if there is a solution I would like to be
> pointed in the direction.

You understand correctly; it isn’t an ideal situation.  The buildbots can’t help you as they are presently implemented.  This also means that binary archives of gds will not be available.  Nor of root5 since a non-default variant is needed.

Note that you can suggest ‘sudo port install gds +python27’ to your users.  Even though gds doesn’t use the specified variant, it will be passed down to dependencies as they are installed and thus should be picked up by root5.

Craig
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