Sequences of 'replaced_by'

[Joshua Root]

On 2015-1-28 06:19 , Davide Liessi wrote:
> Dear all,
> I'm renaming the py-python-poppler-qt4 port to py-poppler-qt4, as
> suggested by Peter Danecek.
> 
> I renamed the port to py-poppler-qt4 and added a py-python-poppler-qt4
> port with the obsolete PortGroup and suitable 'replaced_by' declarations:
> 
> replaced_by         py-poppler-qt4
> subport py27-python-poppler-qt4 {
>     replaced_by         py27-poppler-qt4
> }
> subport py34-python-poppler-qt4 {
>     replaced_by         py34-poppler-qt4
> }
> 
> Updating from py{27,34}-python-poppler-qt4 works correctly: i get the
> message 'pyXX-python-poppler-qt4 is replaced by pyXX-poppler-qt4' and
> the installation completes as expected.
> 
> However py-python-poppler-qt4 previously had support for Python 2.6, 3.2
> and 3.3.
> I tried to upgrade from py26-python-poppler-qt4 and I got this:
> 
> --->  py26-python-poppler-qt4 is replaced by py27-python-poppler-qt4
> --->  Fetching distfiles for py27-python-poppler-qt4
> --->  Verifying checksums for py27-python-poppler-qt4
> --->  Extracting py27-python-poppler-qt4
> --->  Configuring py27-python-poppler-qt4
> Error: py27-python-poppler-qt4 has been made obsolete by the port
> py27-poppler-qt4. Please install py27-poppler-qt4 instead.
> Error: org.macports.configure for port py27-python-poppler-qt4 returned:
> obsolete port
> Please see the log file for port py27-python-poppler-qt4 for details:
> 
> /opt/local/var/macports/logs/_Users_davide_ports_python_py-python-poppler-qt4/py27-python-poppler-qt4/main.log
> 
> Error: Unable to upgrade port: 1
> To report a bug, follow the instructions in the guide:
>     http://guide.macports.org/#project.tickets
> 
> Apparently 'port upgrade' cannot handle a sequence of 'replaced_by'.
> Is this expected or did I do something wrong?
> 
> It is very unlikely that there are users with anything other than
> py27-... installed, given that the only port depending on
> py-python-poppler-qt4 is frescobaldi, which is installed by default with
> Python 2.7 (although it had until recently a python26 variant).
> Anyway, if there is a way, I'd like to provide a clean upgrade path to
> users.

Change py26-python-poppler-qt4 to be replaced_by py27-poppler-qt4
instead, and similarly 32/33 with 34.

- Josh