Qt6 port plan : digiKam 8.0.0 and 7.x maintenance branch

[Gilles Caulier]

Hi

Issue https://bugs.kde.org/show_bug.cgi?id=416704 is now closed for 8.0.0
release.

Gilles

Le sam. 12 févr. 2022 à 15:01, Gilles Caulier <caulier.gilles at gmail.com> a
écrit :

> Hi,
>
> Done : qt5-maintenance branch have been created, based on master code to
> release the next 7.6, 7.7, 7.8 series.
>
> git master was merged with gsoc21-qt6-port branch and is now the code
> used for next 8.0.0 release.
>
> Best
>
> Gilles
>
> Le sam. 12 févr. 2022 à 10:25, Gilles Caulier <caulier.gilles at gmail.com>
> a écrit :
>
>> Hi all,
>>
>> Following the huge commits list done this bugzilla entry:
>>
>> https://bugs.kde.org/show_bug.cgi?id=416704
>>
>> Whole digiKam code compiles under the Qt6/KF6 API from the "gsoc21-qt6-port"
>> branch. There is only few codes not yet compiled due to missing KF6
>> components:
>>
>> - Marble
>> - libksane.
>>
>> But it's just a question of time, and it will not block for the future...
>>
>> Important remarks :
>>
>> - Qt6::QMultimap does not inherit from QMap anymore. This means that we
>> need QMultimap and all iterators ported where it's needed. API has also
>> changed or moved in QMap in favor of QMultimap. Here of course regression
>> tests will be necessary to see if nothing is broken.
>>
>> - There are plenty of warnings now in the console while compiling, and
>> few are really informative. This concerns Qt5 code (that we have ignored
>> until now). Typically, fixing Qt6 port warnings must be reported to Qt5.
>>
>> - I haven't yet checked if this code still compiles with Qt5 in this
>> branch (it must). I'm sure that the minimal version of Qt5 is now 5.14.0
>> instead of 5.9.x at least.
>>
>> - One most important point is the code to merge in master : Where and
>> when ?
>>
>> I propose this plan :
>>
>> 1/ Move master code only compatible and mature with Qt5 in a
>> "qt5-maintenance" branch and use it later for next 7.6 and 7.7 releases. It
>> will be safe.
>>
>> 2/ Merge "gsoc21-qt6-port' to master. This code will be used for the
>> main development stream. digiKam version in master will be "8.0.0-git".
>> Future students will work from master as usual. They can work with Qt5 API
>> in respect with Qt6 compatibility. All students' work will not be
>> backported to "qt5-maintenance" branch.
>>
>> 3/ Backport main commits from master to "qt5-maintenance" branch when
>> it's necessary. Limit this branch to bug fixes now.
>>
>> 4/ Release digiKam 7.6.0 with "qt5-maintenance" branch in a few days or
>> weeks.
>>
>> If there is no objection with this development workflow, I will process
>> changes in git during this weekend.
>>
>> Best regards
>>
>> Gilles
>>
>
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