[Scons-dev] scons running on py2.7 and py3.3

[Gary Oberbrunner]

On Tue, Sep 17, 2013 at 7:09 AM, Neal Becker <ndbecker2 at gmail.com> wrote:


> Russel Winder wrote:

>

> > On Thu, 2013-09-12 at 22:48 +0200, Dirk Bächle wrote:

> >> Hi Neal,

> >>

> >> thanks for all your efforts, trying to get SCons running with Python3. I

> >> created a diff of the (current trunk + 2to3) against your repo, please

> >> find the patch file attached.

> >

> > Indeed, definite thanks to Neal for getting things moving.

> >

> >> Looking at the changes, I think it might be worth a try, and compile the

> >> patch into a little fixer script of its own. Then we could continue with

> >> our basic development on Python v2.6 or v2.7, but easily create a

> >> Python3 version by applying our personal "fixer" and 2to3 on top of it.

> >>

> >> Just as an idea...

> >

> > Everyone I know who has gone with the policy of 2.6/2.7 codebase with a

> > script to use 2to3 to create a Python 3 version has said "forget it it

> > doesn't work". Yes use 2to3 to get a comparator version, but always go

> > with a single codebase that works with 2.6, 2.7 and 3.3, i.e. use the

> > result of 2to3 to guide editing the codebase that still works under 2.6

> > and 2.7 as well as 3.3.

> >

> > I am assuming we will put:

> >

> >         from __future__ import absolute_import, print_function,

> >         unicode_literals, division

> >

> > as the first line in every file so that we write Python 3.3 that runs

> > under 2.6 and 2.7?

> >

>

> At this point, scons does what I need it to do.  What needs to be done

> includes:

> * fix test suite

> * support for 2.6?

>

> I'm afraid I have no motivation to take on either of these tasks.

>  Hopefully

> some others would like to continue the effort?

>

> Yes.  We'll make this happen somehow.  Volunteers are of course welcome!


And Russel, I think your plan has to be directionally correct.  We do have
to aim for a single code base (whether it's 26 or 2.7 floor).

-- 
Gary
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