Re: [gentoo-dev] [PATCH] profiles/package.deprecated: deprecate python:2.7

[Michał Górny]

On Fri, 2020-06-26 at 09:51 +0100, Sergei Trofimovich wrote:
> On Fri, 26 Jun 2020 07:29:45 +0000
> Michał Górny <mgorny@g.o> wrote:
>
> > Dnia June 26, 2020 6:42:57 AM UTC, Sergei Trofimovich <slyfox@g.o> napisał(a):
> > > On Sat, 20 Jun 2020 16:29:53 +0100
> > > Sergei Trofimovich <slyfox@g.o> wrote:
> > >
> > > > On Sat, 20 Jun 2020 16:05:38 +0200
> > > > Michał Górny <mgorny@g.o> wrote:
> > > >
> > > > > On Sat, 2020-06-20 at 14:57 +0100, Sergei Trofimovich wrote:
> > > > > > Give maintainers the chance to act and flag packages that pull in
> > > python:2.7.
> > > > > > Signed-off-by: Sergei Trofimovich <slyfox@g.o>
> > > > > > ---
> > > > > >  profiles/package.deprecated | 4 ++++
> > > > > >  1 file changed, 4 insertions(+)
> > > > > >
> > > > > > diff --git a/profiles/package.deprecated
> > > b/profiles/package.deprecated
> > > > > > index a756e845f47..bb661571962 100644
> > > > > > --- a/profiles/package.deprecated
> > > > > > +++ b/profiles/package.deprecated
> > > > > > @@ -17,6 +17,10 @@
> > > > > >
> > > > > >  #--- END OF EXAMPLES ---
> > > > > >
> > > > > > +# Sergei Trofimovich <slyfox@g.o> (2020-06-20)
> > > > > > +# Deprecated. Consider poring to python 3 and drop support for
> > > python2.
> > > > > > +dev-lang/python:2.7
> > > > > > +
> > > > > >  # Sergei Trofimovich <slyfox@g.o> (2020-02-22)
> > > > > >  # virtual/libstdc++ has only one sys-libs/libstdc++-v3 provider.
> > > > > >  # Use that instead. Or even better use none of them. It's a
> > > > >
> > > >
> > > > > It will trigger the same for packages that support *only*
> > > > > Python 2.7, as well as these that support 2.7 in addition to 3
> > > because
> > > > > they have 2.7 deps.
> > > >
> > > > If we expect actions by developers on both cases I don't see a
> > > problem with that.
> > >
> > > Pushed as:
> > > https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=79d65d6641cfc0ef7b44df491c390e8c880e3049
> > > with full text being:
> > >
> > > +# Sergei Trofimovich <slyfox@g.o> (2020-06-26)
> > > +# Deprecated.
> > > +# - optional python:2.7 dependency should be dropped if no reverse
> > > +#   dependencies are using it.
> > > +# - mandatory python:2.7 depepndency will require package porting
> > > +#   or package removal if no reverse dependencies are using it.
> > > +dev-lang/python:2.7
> >
> > You've just introduced 829 CI warnings
>
> That's the intention.
>
> > effectively disabling the ability to distinguish *new* problems in these packages.
>
> Correct. Citing above:
>
> "If we expect actions by developers on both cases I don't see a  problem with that."
>
> I assume we still do.

Not exactly.  You've pinpointed the wrong target.

First of all, we want people to support Python 3.  Removing support for
Python 2 is a secondary goal.

Flagging packages that support Python 2 in addition to Python 3
and cause no trouble in py2 cleanup is doubtful.

Flagging packages that support 2+3 because of their revdeps is not
helpful at all.  It's just noise to the maintainer who can't remove py2
because of revdeps.

Flagging dev-python/pypy* which needs py2 but is entirely outside
the eclass system is not helpful at all.

-- 
Best regards,
Michał Górny