RIP Qbs=(

Иван Комиссаров

> 29 окт. 2018 г., в 17:32, Ray Donnelly <mingw.andr...@gmail.com> написал(а):
> 
> Agreed, a brilliant bit of technology, such a shame to see it deprecated.
>> On Mon, Oct 29, 2018 at 4:24 PM Corentin <corentin.ja...@gmail.com> wrote:
>> 
>> 
>> Having had the pleasure to use QBS quite extensively (and successfully) in 
>> the past, I would like to thank the QBS team and contributors for showing us 
>> what a sane, modern build system could look like.
>> So long!
>> 
>>> On Mon, 29 Oct 2018 at 13:17 Lars Knoll <lars.kn...@qt.io> wrote:
>>> 
>>> Hi all,
>>> 
>>> As you will probably remember, there have been lively discussions around 
>>> what kind of build tool to use for Qt 6 both during Qt Contributor Summits 
>>> as well as on this mailing list.
>>> 
>>> There has been a strong consent that we should move away from qmake as our 
>>> build tool for Qt due to many shortcomings and the burden we have 
>>> maintaining the system.
>>> 
>>> Thiago wrote a set of relatively strict requirements for such a build tool 
>>> in his mail in July. While some of the requirements had a bit of a Linux 
>>> specific background, they have been a good basis.
>>> 
>>> There have been rather lively discussions around alternatives, but most 
>>> focused around two possible choices for us: Qbs and cmake.
>>> 
>>> Qbs is something that has been developed almost exclusively by The Qt 
>>> Company. As such, TQtC had to also look at it from a business perspective 
>>> and how it fits into the larger picture of making Qt successful. To make a 
>>> long story short, while Qbs is pretty cool and interesting technology, it 
>>> doesn’t really help us expand the Qt ecosystem and usage.
>>> 
>>> To make Qbs really successful would require a rather large effort and 
>>> investment in promoting it towards the larger C++ ecosystem as a new build 
>>> tool. At the same time it has to be an open source product to stand any 
>>> chance in the market. Together this makes it challenging for TQtC to see 
>>> how to recover that investment. Thus this investment would be at the 
>>> expense of other things we’d like to do, like improving our IDE, working on 
>>> rearchitecting and cleaning up our core frameworks for Qt 6 or the design 
>>> tooling we are currently investing into. The Qt Company believes that those 
>>> other investments are more important for the future of Qt than our choice 
>>> of build tool.
>>> 
>>> As such, we were left with the question on whether we need Qbs as the build 
>>> system for Qt 6 or whether cmake (as the other alternative) would be up to 
>>> the task.
>>> 
>>> Given that background, we’ve done some more research on using both Qbs and 
>>> cmake to build Qt. Both projects did give us good results but we were 
>>> actually surprised on how far we got with cmake in a rather limited period 
>>> of time.
>>> 
>>> In addition, cmake has the advantage of being very widely used in the C++ 
>>> ecosystem (amongst many others by KDE), has a very wide support in many 
>>> IDEs and other tools (e.g. VCPkg, Conan etc.), and there’s a lot of 
>>> knowledge about the build system available in the ecosystem. Using it with 
>>> Qt 6 would also mean that we can focus our support on two build systems for 
>>> our users (qmake and cmake) and we would not have to add a third one to the 
>>> mix.
>>> 
>>> Given that we are confident we can build Qt 6 with cmake, I believe that it 
>>> makes most sense to follow down that route. In case you’re interested, you 
>>> can have a look at the cmake prototype code for qtbase on Gerrit in the 
>>> wip/cmake branch. Please also let us know if you’re interested in helping 
>>> with the effort of porting Qt’s build system over to cmake.
>>> 
>>> We have been developing Qbs over the last years, and as such are committed 
>>> to it for some more time. We are planning on another feature release in the 
>>> first quarter of next year and will support it in Qt Creator for at least 
>>> another year. Qbs is open source and if someone wants to take over and 
>>> develop it further let us know as well. I’d also like to use this place to 
>>> thank Christian and Jörg for all their great work on Qbs  (and of course 
>>> also anybody else who contributed to it).
>>> 
>>> Cheers,
>>> Lars
>>> _______________________________________________
>>> Development mailing list
>>> Development@qt-project.org
>>> http://lists.qt-project.org/mailman/listinfo/development
>> 
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