[pkg-php-pear] Bug#976811: transition: php8.0

[David Prévot]

Hi Ondřej,

Le Tue, Dec 08, 2020 at 09:28:38AM +0100, Ondřej Surý a écrit :

> I would like to transition the PHP to version 8.0;

The timing of this request makes me uneasy: php8.0 has been in Debian
for less than a week, and we are a month away from the transition
freeze.

> it's not such a huge bump as it was with 5.6 -> 7.0 and

If I remember correctly, the 7.3 -> 7.4 was not a huge bump either, yet
php7.4 packages were in Debian months before the actual transition
happen, and it took months for the updated php-defaults to actually
migrates into testing.

> most of the packages that were compatible with PHP
> 7.4 are working just fine with PHP 8.0.

That does not match my experience as a maintainer of about a hundred
packages relying on PHP. Many upstream are currently releasing updates
to fix compatibility with PHP 8.0, and many more have not yet done so.

I’m actually surprised to discover this request in the BTS without any
prior communication with teams involved in PHP related packaging.

For example, PHPUnit 8 as currently available in unstable and testing is
expected to run on PHP 8 (thanks to upstream updates less than two weeks
ago), yet “Please note that the code coverage functionality is not
available for PHPUnit 8.5 on PHP 8.” (from upstream changelog 8.5.12).
So shipping PHPUnit 8 with PHP 8 would mean having a major
fonctionnality unavailable for the whole Bullseye life cycle. PHPUnit 9
is available from experimental, yet uploading to unstable would mean
having to deal with dozens of breakage (in the FTBFS form):

https://release.debian.org/britney/pseudo-excuses-experimental.html#phpunit

PHPUnit is just one example, but it seems unrealistic to ship version 9
with Bullseye (I really abandonned this option months ago). Other
packages will break (and I suspect the number of breakage will be high).

This kind of disruptive change would hopefully be better suited early in
the release cycle rather than just before the beginning of the freeze.

That said, it would be nice to have an updated php-default in
*experimental* to help have a grasp of the possible brekages.

Regards

David
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