[Distutils] Proposal for incorporating buildout-versions on buildout (Re: Better version pinning in buildout (buildout-versions))

[Eric V. Smith]

On 1/12/2013 11:18 AM, Jim Fulton wrote:
> On Sat, Jan 5, 2013 at 5:47 PM, Jim Fulton <jim at zope.com> wrote:
> ...
>> I propose that buildout-versions get incorporated into
>> buildout in the following way:
> 
> OK, proposal 1 wasn't accepted.  Here's another stab:
> 
> Proposal 2
> ----------
> 
> 1. The ``allow-picked-versions`` option gets a new allowed value of
>    ``show``. if there are unpicked versions and this option is set to
>    ``show``, then picked/unpinned versions are reported in a way
>    suitable for copying into a versions section, presumably with the
>    same format used by buildout-versions today.
> 
> 2. New buildout option: ``update-versions-file``.  This takes a path
>    (relative to buildout directory) of a file to update with any
>    unpinned versions (in a manner roughly the same as
>    buildout-versions does today).
> 
> 3. New buildout option: ``python-version`` that restricts the Python
>    version, with the same semantics as buildout-version provides now.
> 
> 4. Change: develop eggs found in the buildout's develop-eggs directory
>    will be used even if their version conflicts with a pinned version.
> 
> 5. In buildout 2, The default value of the versions option will be
>    "versions", rather than being unset. This will allow users to
>    omit::
> 
>       version = versions
> 
>    from their buildout section.
> 
> 6. To make it a little easier to supply buildout versions on the
>    command line, make buildout the default section for command-line
>    options, so::
> 
>       update-versions-file=versions.cfg
> 
>    or::
> 
>       allow-picked-versions=show
> 
>    would be allowed. (They are rejected now.)
> 
> Thoughts?

+1. This would work perfectly for me.

-- 
Eric.