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Groups > linux.debian.maint.python > #12546

Re: Python Wheel Related Policy Change

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Hi Scott (2020.04.30_20:33:59_+0000)
> > That seems reasonable, although if we're going down that road, it
> > probably makes no sense for any of them to be universal.
> 
> If we were talking about maintaining this for multiple release cycles with 
> lots of version divergence, I would agree.  Let's not do more than we have to 
> until python2 is gone (whether it is before bullseye or after).

I suspect pypy (2.7) will probably be around post-bullseye, unless
somebody funds pypy to migrate rpython to python 3.

But yeah, we can change strategy later, if appropriate.

> As a result, one could add some kind of py2 flag to dirtbike to tell it to look 
> in /usr/lib/python2.7/dist-packages and make a 'universal' wheel from there.  
> It could then rename the files from py2.py3-none-any.whl to py2-none-any.whl.  
> The bonus Tag in the WHEEL file shouldn't hurt anything.
>
> They key is I think we can do this without actually running python2, we just 
> need to be able to install python-setuptools/pkg-resources.  That should be 
> supportable ~as long as python2.7 is in the archive.

Yep, that sounds good.

> Agreed.  As long as pip supports python2, we should try.  Worst case we can 
> tell people to find their own interpreter and do a --download install with 
> setuptools pinned to 44.0.0 (that approach doesn't need ipaddr because they'll 
> get the upstream pip in the virtualenv too.  

When we get to the download route: pip can parse Requires-Python, and it
looks like virtualenv uses the system pip to download pip, so the
pinning shouldn't be necessary, I think.

> > So, the options are:
> > 1. pin pip dependencies at versions that support py2, forever. Obviously
> >    this is a no-go.
> > 2. Ship py2 and py3 wheels.
> >    2.1. package the py2 weels with dirtbike. This requires bringing back
> >         python-wheel, or more work on dirtbike.
> >    2.2. Ship static py2 wheels (like we did pre-dirtbike). It's not like
> >         upstream is continuing development...
> > 3. Let virtualenv always download pip from pypi for py2. Only ship py3
> >    wheels.
> > 
> > The easy options here are 2.2 and 3.
> 
> 2.1a Where needed package 'py2' wheels with dirtbike running python3.

Ah, yeah.

Still requires keeping py2 source packages whenever a library in the pip
dependency stack drops py2 support. But if they move slowly, that's
fine.

> 2.2 is using sourceless binaries, so I think it's got DFSG issues.  We need 
> the preferred form of modification and a bdist_wheel is not that.

They could be bdist_wheeled at build time, within a single source
package.

> I think 2.1a would be nice if someone can manage it.  We'll need to support 3 
> eventually.  I plan to implement 3 as an option when I upload pip 20.1 and 
> virtualenv 2.0.18.

Not necessarily. 2.2 is equivalent to 3, but without hitting PyPI.

SR

-- 
Stefano Rivera
  http://tumbleweed.org.za/
  +1 415 683 3272

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Thread

Python Wheel Related Policy Change Scott Kitterman <debian@kitterman.com> - 2020-04-30 05:30 +0200
  Re: Python Wheel Related Policy Change Matthias Klose <doko@debian.org> - 2020-04-30 09:30 +0200
    Re: Python Wheel Related Policy Change Scott Kitterman <debian@kitterman.com> - 2020-04-30 12:00 +0200
      Re: Python Wheel Related Policy Change Scott Kitterman <debian@kitterman.com> - 2020-04-30 18:30 +0200
        Re: Python Wheel Related Policy Change Stefano Rivera <stefanor@debian.org> - 2020-04-30 20:40 +0200
          Re: Python Wheel Related Policy Change Scott Kitterman <debian@kitterman.com> - 2020-04-30 22:40 +0200
            Re: Python Wheel Related Policy Change Stefano Rivera <stefanor@debian.org> - 2020-04-30 23:50 +0200
              Re: Python Wheel Related Policy Change Scott Kitterman <debian@kitterman.com> - 2020-05-01 00:30 +0200
                Re: Python Wheel Related Policy Change Scott Kitterman <debian@kitterman.com> - 2020-05-01 22:50 +0200
                Re: Python Wheel Related Policy Change Nicholas D Steeves <nsteeves@gmail.com> - 2020-05-01 23:10 +0200

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