OK, I got confused because Rainer started off with "Yes this is supported...", 
sorry.
I conclude that what I am asking for is not supported.
Thanks.

________________________________
From: Brandon Allbery [[email protected]]
Sent: 09 November 2015 18:16
To: Artur Szostak
Cc: Rainer Müller; macports-dev
Subject: Re: Handling of multiple Portfile versions

On Mon, Nov 9, 2015 at 12:10 PM, Artur Szostak 
<[email protected]<mailto:[email protected]>> wrote:
> considered by MacPorts. The first ports tree that contains a port by
> that name in the order listed in sources.conf will be used. All other
> Portfiles in ports trees listed below that are not considered at all for
> any port action.

>> port install myport @1.2
>
> This syntax is not supported for 'port install'. The port with this name
> is installed, you cannot specify a version.

OK, then given my specific example above, how do I install myport version 1.2 
rather than version 3.4? Or conversely, how do I install version 3.4 rather 
than 1.2? It seems like you are telling me MacPorts will make a random 
selection and there is no way to control this. If that is the case then surely 
concurrent multiple versions of Portfiles from different repositories are not 
properly supported.

As quoted above: the first one found via sources.conf will be used. In this 
case it will be 3.4. You would need to swap the sources.conf entries to get 1.2.

OK, I misunderstood the selection mechanism of the port command. How about the 
following alternative, should that work?

port install myport and version:1\.2
port activate myport and version:1\.2

No. The first one found via sources.conf will be used; as you specified them 
that will *always* be 3.4. The other Portfile is effectively invisible; you 
*cannot* select it.
If, on the other hand, you had already installed via that Portfile (by swapping 
sources.conf entries as above), then you could manipulate *that* installation 
using the @version syntax (and it will use the Portfile stored in the registry 
from that install, not the one for the currently available version).

So if the command with the @version syntax is not following the dependencies 
when using the --follow-dependencies option, then I have a bug?

It follows the dependencies recorded for the specific version that you are 
removing. If those are incorrect then you have a Portfile bug for that version.

--
brandon s allbery kf8nh                               sine nomine associates
[email protected]<mailto:[email protected]>                                 
 [email protected]<mailto:[email protected]>
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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