Subject: 5.9 freeze, Windows, regression-fixes and Python 2 drop

[Augie Fackler]

I’m going to be unable to pay attention to Mercurial stuff during the freeze (probably the whole freeze? unsure) so it’d be helpful if others can make sure releases happen (including signing and cross-review).

I’m +0 on a freeze this time, to try and smoke out some real problems, as long as we also get that 5.8 pull regression fixed.

AF

> On Jul 13, 2021, at 12:05 PM, Raphaël Gomès <raphael.gomes at octobus.net> wrote:
> 
> Also relevant to fix before the release: https://phab.mercurial-scm.org/D11052
> 
> On 7/13/21 3:47 PM, Raphaël Gomès wrote:
>> Hi all,
>> 
>> As you know, the 5.9 freeze is coming up and should happen on the 18th of July.
>> 
>> This release will be a special one since, as of yesterday¹, all critical tests pass on our Windows Python 3 Heptapod CI. Tests related to extensions (like SVN support, `remotefilelog`, etc.) still have to be worked on and there is minor flakyness with a few tests², but the message is: I vote that this be the first release to support Python 3 Windows officially and the last to support Python 2 altogether. This will give us enough time to iron out the details in time for the 6.0 release to be the first Python 3 only release of Mercurial.
>> 
>> For the past few versions we haven't had much of a real freeze, which I think makes sense given the volume of contributions and the relatively good track-record of (lack of) regressions, but this time I want to propose that we observe a real freeze to dedicate at least some time to fixing the issues we're having and stabilizing the new stuff.
>> 
>> To name some things explicitly:
>>   - The parent ordering issue³ which is almost 50% why I'm advocating for the freeze⁴
>>   - Windows Python 3 support and improving CI coverage
>>   - `chg` now almost consistently times out some tests
>>   - `test-chg.t` is super flaky because of `sleep` calls
>>   - Bugs that have began building a settlement in bugzilla
>> 
>> I, for one, am happy that the end of the Py2 era is finally visible at the end of the tunnel and would like to thank all involved in the recent Windows endeavor.
>> 
>> Lastly, the Heptapod Windows CI Octobus is providing for this transition will cost about 400€ per month. We're currently running on free credit we have thanks to a partnership with OVH given for use in the Heptapod project, but this will run out one day and we very much encourage those who can help to reach out. Octobus is a 5-people European team already funding the development of Heptapod out of pocket, and there is only so much that can be reasonable for us to shoulder in the long-run.
>> 
>> What are your thoughts?
>> Raphaël
>> 
>> [1] https://foss.heptapod.net/octobus/mercurial-devel/-/jobs/222914
>> [2] https://foss.heptapod.net/octobus/mercurial-devel/-/issues/12
>> [3] https://bz.mercurial-scm.org/show_bug.cgi?id=6538
>> [4] Larger users, including Mozilla, are affected by the bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1720302
>> 
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