Re: [Jython-dev] Jython 3: greenhorn questions from an old hand

[Jeff A. <ja...@fa...>]

Maybe my perception is coloured by the work I did last, which was very 
specific to Python 2, and doesn't belong in 3, but I'd dismissed any 
mechanical merge as impossible or inadvisable. I think each change we 
made to 2 will need cherry-picking on its merits, but you're right about 
doing it systematically. This may actually be what I spend time doing.

Given the pervasive nature of the (close to 700) changes on the Jython 3 
fork, it seems likely there would be constant conflict. I expect to 
spend a lot of time with Kdiff3.

Quite understand about your GSoC commitment: don't worry, we won't go 
far without you. :/

Would appreciate answers to my newbie questions.

Jeff

Jeff Allen

On 29/05/2017 15:31, Stefan Richthofer wrote:
> I really recommend that we (at least try to) merge 2.7.1 work into Jython 3 as far as and wherever possible.
> That means, really go back to the spot where 3 was forked from 2.7 and look at every single commit and merge it.
> I suppose this can be done in a semi-automated manner. Maybe it's not possible entirely with github GUI, but
> maybe we can save the changesets somehow. Git certainly has a way to use a changeset file as input for its
> merging algorithm. Ideally we would have a script that applies all changes that are automatically mergable.
> Every changeset that cannot be merged automatically should get a look (from its author ideally).
> Either it can be adjusted with reasonable effort, or it is maybe not applicable to Jython 3 for fundamental reasons.
>
> We should do this before Jython 3 and 2 diverge even more. Chances that automatic approach is vastly applicable will
> decrease more and more. I really doubt I can motivate myself much to work on a Jython 3 codebase that is full of
> issues we already solved. I'd rather much prefer to fix things that might break due to the merge process.
>
> Unfortunately I cannot help much on this process right now, because GSoC is about to launch.
> Will be in for Jython 3 later this year again.
>
> Best
>
> -Stefan
>
>
>
>> Gesendet: Montag, 29. Mai 2017 um 12:07 Uhr
>> Von: "Jeff Allen" <ja...@fa...>
>> An: "Jython Developers" <jyt...@li...>
>> Betreff: [Jython-dev] Jython 3: greenhorn questions from an old hand
>>
>> With 2.7.1 seemingly on its release journey, I have a bit of time to
>> hack on Jython 3.  A lot has been done to Jython 3 since it forked from
>> 2, so I have some really newbie questions:
>>
>>    * Is https://github.com/jython/jython3 the official reference
>>      repository? (Is https://hg.python.org/sandbox/jython3 dead?)
>>    * Are we still building with Ant? (It didn't for me on Windows, and I
>>      thought I'd fix that first.) BTW, this is a question about now, not
>>      what we'd like to do in future.
>>    * Versions: Java 8, and Python 3.5?
>>    * Although I believe I could commit directly to
>>      https://github.com/jython/jython3, or a branch in there, do we agree
>>      a better practice is to fork, branch and create a PR for a "feature"
>>      (groups of related commits)? Even if I then accept my own PR, it
>>      seems to give us a better audit trail, integration test, squash
>>      point, etc.. A separate thread/discussion is due about workflow,
>>      naming, etc..
>>    * Do we agree that our aim is to run the CPython regression tests with
>>      as few skips, exclusions and replacement tests as possible?
>>    * Does anyone have code stored up that I risk duplicating? (E.g.
>>      Somewhere, Darjus mentioned ANTLR4 migration.) Otherwise I'll just
>>      start with things I know about (bytes and strings, buffer interface,
>>      io, import perhaps), driven by getting Py3k tests to pass honestly.
>>
>> I will averaging much fewer than 3 commits a day. ;)
>>
>> -- 
>>
>> Jeff Allen
>>
>>
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