On Tue, 17 Dec 2024 at 18:00, Julien Cabieces <julien.cabie...@oslandia.com> wrote: > > > Hi, > > I'm also in favor of switching to Qt 6 builds and the timeline you > propose Martin seems reasonnable to me. > > However, I think we should increment the QGIS major version to 4.0 in order > to stongly advertise our users and plugin developers that there is an > API break. If we are not doing now, when do we plan to increment the > major and clean the code from all deprecated content?
I'm SO strongly against breaking QGIS API unless we ABSOLUTELY have to. The pain of the 3.0 transition is still relatively fresh in my memory, and I think we would be doing our users and end user organisations a great disservice by moving to QGIS 4.0 now. I think a 4.0 API bump should be an absolute last resort, when we have no other option. > > Regarding the proposal of having 2 versions (Qt 5 and Qt 6), I'm not > completely sure this is a good idea. I'm afraid that plugin developer > would delay the plugin migration if this is still possible to run a QGIS > with Qt 5. Well, that's entirely their choice. But I'd imagine end user pressure would result in the majority of frequently used plugins being upgraded quite quickly. And if a particular plugin ISN'T compatible with the QT 6 builds, then the user who requires that plugin could still run the Qt 5 build for the foreseeable future. > It would also be > interesting to display on the plugins platform which are compatible with > Qt 6 and which are not. Definitely -- that would help users make informed decisions as to which is the best choice for them. Nyall > > Regards, > Julien > > > > > On Tue, 17 Dec 2024 at 10:48, Greg Troxel via QGIS-Developer > > <qgis-developer@lists.osgeo.org> wrote: > > > >> I wonder about "less stable" qt5 and "more stable" qt6. Do we really > >> believe that qgis built on qt6, with no plugins will have fewer crashes > >> and quirks, than the qt5 build? > > > > Yes, I do. Because Qt 5 is not improving any more, but Qt 6 is. An example > > would be when running under Wayland environments on > > linux -- it's a very broken mess on Qt 5 and will never be fixed. On Qt 6 > > it's only a slightly-broken mess, and will likely be non-broken within > > the next 12 months. There's a similar situation for apple processors, which > > never had full official support on Qt 5 but ARE fully supported > > on Qt 6. This gap is only getting wider as newer operating system updates > > and corresponding changes break things underneath Qt 5. > > > > There's also a limited stream of bug fixes getting ported back to Qt 5.15, > > vs those flowing into the supported Qt 6 releases. > > > >> That is surprising to me at this point. > >> Do we still believe that if one assumes "qgis with N random plugins that > >> claim to support qt6"? > > > > (Well, QGIS + **ANY** plugin = a less stable QGIS. 🤣 But that's a > > completely different point) > > > >> I expect a qt6 build is kind of like a .0 release, and we would want to > >> have qt6 builds widel avaialable and time for feedback before saying > >> it's stable. > > > > I'd say we're well past the ".0" stage of Qt 6 support. Almost all the core > > functionality is quite well tested at this stage, and third party > > clients (like Mergin and QField) switched to Qt 6 based QGIS builds earlier > > this year. I'm confident that by the time we hit a (potential) > > October 2025 milestone that we'll have a very stable Qt 6 build available. > > > > Nyall > > > >> > >> _______________________________________________ > >> QGIS-Developer mailing list > >> QGIS-Developer@lists.osgeo.org > >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > _______________________________________________ > > QGIS-Developer mailing list > > QGIS-Developer@lists.osgeo.org > > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > -- > > Julien Cabieces > Senior Developer at Oslandia > julien.cabie...@oslandia.com _______________________________________________ QGIS-Developer mailing list QGIS-Developer@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
