[Development] Qt modules, API changes and Qt 6

[Oswald Buddenhagen]

On Tue, Sep 17, 2019 at 06:56:39AM +0000, Simon Hausmann wrote:
>When the todo list is empty and there are no more pending updates, the 
>batch update is complete. If during that update there were no failures, 
>the Qt Module Updater will also push a change to qt5.git with an update 
>to all submodule sha1s of the new consistent set of modules.
>
an approach that doesn't put redundant dependency information inside the 
modules and doesn't spam them with updates to that info would have been 
preferable.

for example, the information that a build with updated dependencies is 
required can be stored as an annotation in the commit message (that's 
exactly what zuul does, afaik), and the incremental propagation of the 
dependencies can be done in a "shadow" branch of the qt5 repository 
(technically, that could be a single gerrit change that gets 
progressively updated).