Tue, 11/19/2013 - 17:07
since some people asked me: The slides to my extended Apps on Speed talk from this year’s Qt DevDays Berlin are available for download. If you are interested, get them here: http://devdays.kdab.com/wp-content/uploads/2013/11/qt-dd-2013-apps-on-sp…
I hope you liked that talk. I certainly had fun presenting it and discussing the contents with various attendees later on. I have now quite some ideas on how to extend the talk even further.
The slides of the other presentations are also available. Stay tuned for the video recordings of DevDays Berlin, I’m sure they will be accessible soonish :)
Edit: The video is now available! Enjoy http://www.youtube.com/watch?v=C5EPt50Kgmc
Thu, 10/31/2013 - 16:04
KDevelop 4.5.2 is finally released! Go see the announcement on our website for more info: http://kdevelop.org/45/kdevelop-452-available
Note that this release contains some serious crash fixes, so update asap, i.e. as soon as your packagers get to it :)
Enjoy and thanks to all contributors! Looking forward to KDevelop 4.6 already!
Tue, 09/03/2013 - 00:24
Today, after a bit more than a month since I started working on it, I merged the
projectfilterbranches into KDevplatform/KDevelop. This is a generic configuration interface and library which allows users to customize which folders/files KDevelop includes in a project.
How to use it
The simplest way to use the new code to exclude items from a project, is to use the context menu. Simply right click on any folder/file (not the project root, or anything target related) and choose the “exclude item from project” action. This will then add a filter for the selected item(s). If you want to undo this, go to the project configuration (see below) and remove the filter.
For more advanced management of project filters, or to remove filters and/or adapt the default filters, you need to go to the project configuration and select the new “Project Filter” config page. This allows you to add new filters, remove existing ones or edit them, including reordering them.
How it works
The pattern syntax uses
QRegExp::WildcardUnixon relative project paths. This should be fairly easy to grasp and similar to what you know from e.g.
svn:ignore. Generally, if you can write a
.gitignorefile then you should be able to configure your KDevelop project as well!
If you wonder what you can do with the include/exclude pattern type, see again the documentation of
!patternsyntax. It allows you to selectively unhide some paths which where previously hidden. E.g. you can only show
*.cppfiles in your project by first excluding all files
*and then adding an inclusive pattern for
Note that the distinction between files/folders is probably not required most of the time. It does allow for some better performance though and may make some patterns more easy to write.
Note to Users-Who-Compile-Master-From-Source
Those of you who build KDevelop/KDevplatfrom from git master, please make sure to remove
kcm_kdev_genericprojectmanagersettings.soand just to make sure also remove
kcm_kdev_genericprojectmanagersettings.desktop. Otherwise you’ll get the old generic manager configuration alongside the new project filter, which may break things.
If you install KDevelop via the package manager of your distribution, you should have nothing to do but wait until we release a new KDevelop version (4.6) which will then include this new feature!
Anyhow, please test this and report bugs on bugs.kde.org. Feature requests also welcome, but I like that this new UI is rather simple and still powerful. I’m reluctant to add more here. Something which I do want to implement in the future though is support for reading e.g.
.gitignorefiles and hiding files based on that from the project. The new API I added to KDevplatform should make this rather easy btw. You/I just have to write a new plugin implementing the
IProjectFilterProviderinterface and then we could e.g. query
gitdirectly for whether a given path is included or not.
Sat, 07/20/2013 - 01:23
I’ve been gone for eight days and returned just a few hours ago to Berlin. It doesn’t feel like that. The last days went by in a blur of awesomeness! The reason why I didn’t write a single blog post in between is just that I never had a spare minute for that. I arrived on Thursday and instantly enjoyed the warmth of Spain / the Basque country and had a tasty and cheap Menu del Dia at a local Restaurant with fellow KDABians and other KDE friends. Then just a few hours later the first party started, near the old district of the city - amazing! More and more hackers and helpers arrived, the atmosphere was once again so good. The social aspect of this years Akademy was without comparison in my opinion - seriously: Hats off to the local team, you did an amazing job!
While the social events on the following days have been just as awesome or even awesomer to awesomest - I especially enjoyed the day trip and jumping into the ocean! - the technical side of Akademy delivered just as well: My favorite talks this year where Mirko’s about ThreadWeaver, which we heavily use in KDevelop. His roadmap and polished API looks much better than what we have nowadays and should allow for much nicer code which might even perform better - kudos!
Similarily, I liked Volker’s talk about Expression Templates and Kevin Krammer’s presentation of Declarative Widgets a lot. Both of them are colleagues of mine, so the contents weren’t that new to me - yet hearing it all in a concise and entertaining manner is always worth it. The crowd also seemed to enjoy it. Martin Grässlin’s talk about being the 1% corner case was also highly entertaining and gave a very interesting insight into the problems he tackles day to day.
There have been other, less technical talks, which I also appreciated greatly: Kevin Otten’s visionary roadmap for KDE as a community or Till’s highly entertaining presentation of BlackBerry. Which brings me to the sponsors - many thanks! Without them, this year’s event would surely not have been as good as it was!
Oh boy, I already wrote a lot, yet only covered the first three days… After the AGM and presentations on the week end followed a full week of highly educational BoF’s - both around KDE topics (such as KF5, KDevelop, …) or “plain” Qt during the Qt Contributor Summit. This was my first time attending the QtCS and I definitely want to see more of this! Discussing the future of QtWebKit and learning more about whats cooking in QtCore was certainly worth it. Being in contact to the QtCreator and QML guys also helps from a tooling point of view in general and from a KDevelop pov in particular. Oh and we got a nice BlackBerry Z10 phone - many thanks for that!
The afternoons are mostly a blur - I mostly remember lots of Foosball, Socializing, Drinking, meeting Friends of Old and New, Eating, Partying etc. pp.
Anyhow, I think I need to stop here.
tl;dr; Thank you local KDE team for organizing such an awesome Akademy + QtCS 2013! Thank you Sponsors for making this possible!
PS: All of you who attended talks on the weekend: Go and rate them! The speakers will love you and provide you with even better talks next year! Go to either the page for the talks on saturday or the talks on sunday, then pick the sessions you attended and finally hit the “Feedback” link!
PPS: I definitely have to come back to the Basque country, the country side looked beautiful and Bilbao alone is worth the trip! And I didn’t even have time to visit the Guggenheim…
Cheers, see you next year you insane awesome crowd of KDE people!
Thu, 07/04/2013 - 19:30
you didn’t hear anything from me since quite some time… Thing is, this is my last “regular” semester of university where I have two lab courses that are very time demanding. The year after, I’ll be spending time on my master thesis, which hopefully will allow for some more leisure time for KDE.
Anyhow, a small project which I just worked on to write some small lines of code again was to make my BKO backtrace highlighter work on Chromium. It requires the Tampermonkey extension to get more compatibility with Greasemonkey of Firefox fame, otherwise it works more or less out of the box!
After fixing some small other inconsistencies I can now say that it works fine in both, Firefox and Chromium! I furthermore took the liberty to extend its functionality a bit: You now also get highlighted Valgrind traces, i.e. generated by memcheck and other error reporting tools - yay!
highlighting of a Valgrind memcheck trace on bugs.kde.org with additional navigation helpers, using Chromium
Oh and before I forget it: See you all next week at Akademy! I’m so looking forward for the intense hacking and socializing, esp. since I missed last year! And: If you are interested in how to improve the performance of your application(s), make sure to attend my talk on Sunday: Apps On Speed
Sat, 01/26/2013 - 17:06
During the sprint in Vienna last year, Aleix and me laid the ground work for a QML/JS language support plugin for KDevelop. Sadly we two only have very limited time working on fancy new features such as that.
Anyone else out there who wants to help? Or maybe someone wants to work on our QML support? We KDevelop hackers would be happy to help!
Thu, 11/29/2012 - 21:10
Cheers, and again many thanks to the KDE sysadmin crew!
Sun, 11/25/2012 - 17:53
I’m investigating the feasibility of allowing a subset of C++11 in the KDevelop code base, starting after the branch of 4.5 in a few weeks. I do not want to blindly start going that route just to realize afterwards that I’ve alienated a large portion of our user base. Thus I’d very much welcome if you could read through this blog post and give some feedback which we can build our decision on top.
Here’s the email I sent to the KDevelop development mailing list:
Is anyone opposed to open KDevelop 4.6 for C++11? I.e. that means we continue to work as-is and provide a kick-ass KDevelop 4.5. Once we branch 4.5, we enable C++11 mode globally and start using it in master.
KDevelop is a free time project and it should be fun to work on it. C++11 is quite a lot of fun, if not only because it’s new. This is actually the main reason for me to go down the C++11 route. This would also allow us to learn C+11 which is a benefit for those of us who do professional work-work programming.
Tons of potential performance benefits thanks to constexpr, noexcept, r- value references etc. pp.
Much easier to read code thanks to auto, lambdas, alias templates, defaulted functions, etc. pp. This also leads to better maintainability.
Improved compiler analysis thanks to e.g. static assert, override, final, nullptr, explicit conversion operators, deleted functions, etc. pp.
Personally I’d say we should just require these compiler versions and above:
clang 3.1 - required for constexpr, lambda, initializer lists, …
GCC 4.7 - 4.6 might even be enough, but 4.7 has some more stuff like delegating constructors, override, final and non-static data member initialization.
msvc ctp november 2012 (http://blogs.msdn.com/b/vcblog/archive/2012/11/02/visual-c-c-11-and-the-…)
FreeBSD situation? http://wiki.freebsd.org/NewC%2B%2BStack <— I’m not sure how far they are. But quite frankly, I’d say they can stick to KDevelop 4.5 until they have a modern compiler like clang 3.1.
Debian? Wheezy should come with GCC 4.7 if I’m not mistaken: http://packages.debian.org/wheezy/gcc Imo it’s fine if we only support that version of Debian. All other distros probably already have GCC 4.7 available, or will have it in their next distro release in time for KDevelop 4.6
Windows? If anything breaks on MSVC it’s imo not an issue as KDevelop is defacto dead on Windows (noone is working on it there). Also considering that the windows team is actually working on proper C++11 support (see link above) its only a matter of time until it has everything we need.
Backporting: Now this is imo a potential issue, but considering that we don’t do such a good job in that regard anyways, it’s not that big a deal… And most of the fixes we do backport are oneliners which could be done in the 4.5 branches and forward ported to 4.6.
So far a few more concerns where raised:
Mac OSX: only “recent” Mac OSX come with a clang that is new enough. Question is: Which version is that exactly? Do people use KDevelop on an older Mac OS? My personal impression was that most Mac users upgrade asap to the newest OS version, thus this should not be an issue?
Windows: While the team around Herb Sutter is doing a tremendous job in advancing the compiler to provide kick-ass standard support, apparently the Windows users are reluctant to upgrade… But the obvious question is: Should we be held back by an imaginary Windows user base? KDevelop does compile on Windows, and mostly works but afaik there are still some very sore spots, esp. in the CMake project management and the lack of a MSVC debugger integration. Anyhow, would allowing C++11 in the KDevelop code base make it considerably harder for potential contributors? Considering that even now we do not get any contributions from Windows users, I doubt it can get any worse… But I do see that it’s a hen/egg problem.
BSD: FreeBSD is in the process of using Clang. But is that process already finished? If not, is there any ETA? Will there be Clang 3.1? What about other BSDs and Unixoids?
What about unsupported platforms?
Personally, I think KDevelop is currently in a pretty good shape. If some platforms would have to stick to KDevelop 4.5, I don’t see such a big issue in that. We could also think about making it our first “LTS” release and backport essential bug fixes for a longer period.
Why not the Qt way?
Qt 5 makes use of C++11 features where possible in a backwards compatible way. It is of course the correct choice for a library that wants to support multiple platforms. But imo, KDevelop does not have such strict requirements. Rather, it should offer maintainable code that is fun to work on. Thus I am stricly against introducing
Q_DECL_CONSTEXPRin our code, instead of using
constexprdirectly. And of course, in Qt you cannot use auto, nor lambdas, nor many other things as you always have to provide a C++03 fallback.
Lets try it out, no?
As Aleix pointed out, I’ll probably just start a new branch and introduce some C++11 features there. Then we can see whether the gain in code readability or performance is worth the introduction of the mandatory C++11 requirement.