Re: [Openembedded-architecture] Python 3 for Bitbake

[Christopher Larson <clarson@kergoth.com>]

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On Thu, May 5, 2016 at 8:13 AM, Mark Hatle <mark.hatle@windriver.com> wrote:

> On 5/5/16 7:13 AM, Philip Balister wrote:
> > On 05/04/2016 05:29 PM, Mark Hatle wrote:
> >> On 5/4/16 3:56 AM, Richard Purdie wrote:
> >>> My proposal is we decide to have the flag day, we queue up the patches
> >>> on a python3 branch both in oe-core and bitbake, then we switch when we
> >>> get successful autobuilder builds. I'd ideally like to do this quite
> >>> soon and get one with it (within a few weeks), leaving plenty of time
> >>> to handle issues and the other changes planned for this release cycle
> >>> and give other layers time to adapt.
> >>>
> >>> I will likely push things so the basics in the core work, I'll then
> >>> need help for things like toaster, the QA framework, the supporting
> >>> tools (devtool, recipetool and so on).
> >>>
> >>> Does anyone object to this?
> >>
> >> I think this is a good plan.  Flag day, and switch.
> >>
> >> Question, do we need any type of identifier in layers to say they're
> "python3"
> >> compatible or not?
> >
> > Layers that are python2 will need krogoth branches. I'd expect master
> > branches to follow oe-core/master and jump to python3.
>
> I don't disagree, but my experience has been that branching is late or
> never in
> a lot of layers.
>
> This might be a place where we need to plan to go through the layer index
> and at
> least see if the layer parses -- and flag things that no longer parse?  (I
> don't
> even know if this is something reasonable to attempt.)
>
> My fear is just we've already got a lot of "broken" (without defining that)
> layers in the index, and I think it will be worse once the python3 change
> happens.  I'd really like to make sure we don't confuse people with
> various errors.


Perhaps we should consider some sort of flag or dependency/versioning
statement in layer.conf?
-- 
Christopher Larson
clarson at kergoth dot com
Founder - BitBake, OpenEmbedded, OpenZaurus
Maintainer - Tslib
Senior Software Engineer, Mentor Graphics

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