[pypy-dev] Switching nightly builds from py3.6 to py3.7

[Matti Picus]

On 11/27/20 7:03 PM, Ronan Lamy wrote:

> On 26/11/2020 18:16, Matti Picus wrote:
>> Now that the re fixes are in for py3.7, I think our primary branch 
>> for development should be py3.7, with backports to py3.6 if needed. 
>> PEP 494 for python 3.6 has that version in a security-fixes-only 
>> stage, so we should adopt a similar strategy (although some bug-fixes 
>> may be needed, especially around utf8 problems that are still 
>> cropping up).
>
> I think it's a bad idea to reverse the direction of merges now. We 
> still have quite a few fixes coming in for 3.6.
>
>> Toward that end, I have updated the buildbot configuration to build 
>> nightlies off the py3.7 branch instead of the py3.6 branch. So if you 
>> wish to obtain a newer build of py3.6, you will need to manually 
>> trigger the buildbots.
>
> +1 though ideally we would just run both as nightlies.


The fixes so far for 3.6 (after the last release) have been

- merge from default to fix default attributes in XML (issue 3333)

- merges from default to support the py3.7 regex changes

- merge from default of rpy-cparser (code rearrangement)

- fixing _crypt import

- fix utf_8_decode(... final=False) (issue 3348)

- merge workaround to detect failed imports intests from default, which 
exposed missing _opcode builtin module


The bug fixes were for XML, utf_8_decode, and _crypt, which could have 
been backported from py3.7 to py3.6 instead of forward merged from py3.6 
to py3.7.


Since we depend on contributed machines for our buildbot machines, I do 
not feel comfortable running 3 nightly builds. To be fair, maybe only 
the macOSx (contributed by someone who also runs CPython builds) and the 
windows (which I run on a VM at home) machines would notice the extra 
load, but it still seems an imposition.


So if you accept the limitation of 2 nightly builds on windows and 
macOSx, which would you choose? Also take into account after we merge 
the win64 branch, windows runs may become unstable for a while.


Matti