Re: switching to Python 3.x

[Jonas Hahnfeld]

Am Sonntag, den 26.01.2020, 16:25 +0100 schrieb David Kastrup:
> Han-Wen Nienhuys <
> address@hidden
> > writes:
> 
> > On Sun, Jan 26, 2020 at 3:33 PM David Kastrup <
> > address@hidden
> > > wrote:
> > > > > What David is concerned about (as far as I understand) is that we need
> > > > > to modify the spec for LilyPond to require the new python3 package as 
> > > > > a
> > > > > dependency. This will (obviously) not work for packaging 2.20.
> > > > 
> > > > Fair enough, but that would only be a problem if we ever have to
> > > > produce a 2.20.1 . We could delay 2.21.0 for a while.
> > > 
> > > I prefer pushing out 2.21.0 right after 2.20.0.  It's been too long in
> > > the making by far already.  And while the 2.20 release is not quite
> > > within the time frame I aimed for a week ago (contact me for details), I
> > > don't expect the additional delay to be able to push 2.20 beyond
> > > February.
> > > 
> > > > If we get lucky, we never have to produce a 2.20.1. If we do, we might
> > > > have to backport the py3 patch.
> > > 
> > > 2.20 is in maintenance mode for as long as 2.22 is not out yet.
> > > Considering the amount of stuff stacking up on the 2.22 slate right now
> > > regarding platform support alone, that is likely going to be a while.
> > > 
> > > I don't think that Python3 will port to PowerPC, so a backport of
> > > Py3-only code would entail cutting its support in the middle of the 2.20
> > > lifetime.  To be honest, I already had suggested cutting it before 2.20
> > > but was met with resistance.
> > 
> > OK. So what is your proposal for how to proceed with Jonas' patch?
> 
> Different possibilities.  Probably easiest is to have different GUB
> setups for LilyPond-2.20 and LilyPond-2.22.  Then we can stick with
> Python2 (and PowerPC installers, yuch) for as long as 2.20 is a thing
> but move on otherwise.

https://lists.gnu.org/archive/html/lilypond-devel/2020-01/msg00041.html
-> I'd propose to just create a branch for GUB from the current commit.

Jonas

> 2.20 should be out soonish, and we definitely
> don't want to have that patch gather bitrot.

P.S.: Can't decide on a comment for this one

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