[Bug 209551] Python bits ignore DEFAULT_VERSIONS

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209551

David Naylor <dbn at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|Open                        |Closed
         Resolution|---                         |Works As Intended

--- Comment #13 from David Naylor <dbn at FreeBSD.org> ---
Hopefully I understand this PR correctly (I have haven't, please comment with
an example and I'll reopen).  

Changing the priority order from:
  PYTHON_VERSION > ${LOCALBASE}/bin/python > DEFAULT_VERSIONS
to
  PYTHON_VERSION > DEFAULT_VERSIONS > ${LOCALBASE}/bin/python
will not work if:
 a) the user installs the metaport lang/python2 or lang/python3, then
 b) changes DEFAULT_VERSIONS, and
 c) the port depends on a python metaport.
For example, lang/python3 is installed referencing python3.4 but the user (or
the framework) changes DEFAULT_VERSIONS to python3.5.  

In this situation any port depending on a metaport (i.e. USES=python:2 or
USES=python:3) will think it is depending on a version it is not (i.e. python3
is python3.4 but the port will think it is python3.5).

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