Achievements of modern technology

It is often said that one picture can tell a thousand words. This is a picture of the tablet I bought in 2015 browsing the boot floppy I created in 1998. Yes that was 18 years ago.



New linter integration plugins for KDevelop

Hi there!
I’ve just moved some linter integration plugins to the KDE infrastructure (scratch repos), therefore making them generally available.
They are fairly simple plugins, all 3 of them are alike in that they just run an external tool, and bring the results (the issues found) into KDevelop’s GUI. The found issues then will be in the problems toolview, in their own separate tab. The tools can check either a single file or all files in the project. You can see the workflow and configuration options in the videos included. There are also user’s manuals and tech manuals in the docs directories of each repo.

This plugin integrates Clang’s static code analysis feature, providing C/C++ static code analysis.

Git repository:

This plugin integrates a linter called Pylint, and as the name suggests it’s a Python code analyzer.

Git repository:

This plugin integrates a linter called JSHint, and as the name suggests it’s a Javascript code analyzer.

Git repository:

New GUI for kdev-cppcheck

Hi there!

As you all probably know CppCheck is static code analyzer tool for C and C++. KDevelop has a plugin that provides a front-end for it, and the plugin is called kdev-cppcheck.

The good news is I’ve updated it’s GUI and now it uses the KDevelop Problem Checker Framework.

In the past it used to have it’s own toolview, where it showed issues in different formats (flat issue list, grouped by files, grouped by issue severity), based on the settings set in a KCM module.

Here’s a screenshot showing and example of this


What I’ve done is break up that KCM module, and create a per project settings window, and a general global settings window. The global settings window allows you to set the location of the cppcheck tool


The per project settings window allows one to set the rest: parameters, and what should be checked


Also the results area now shown in the problems toolview, just like problems found by the background parser, in it’s own tab.


Here’s a video showing the workflow

New GUI for kdev-krazy2

Hi there!

First of all let me introduce some concepts for readers who are unfamilair with them.

What is krayz2?

Krazy2 is a set of code tests (basically static code analysis) for KDE developers.

What is kdev-krazy2?

kdev-krazy is a plugin for KDevelop, that provides a frontend for Krazy2, so it can be run directly from KDevelop. The resulting issues also show up in KDevelop.

What’s changed?

I’ve given some love to this plugin lately: First I ported it to KF5 so it can run in the latest KDevelop. Now I’ve changed it’s GUI so it now uses the new KDevelop Problem Checker Framework.

Up until now the plugin had it’s own toolview. That’s where settings could be changed, analysis started, and that’s where the issues showed up. Let’s see some screenshots!

The first one shows the main KDevelop window, with the plugin loaded, showing the krazy2 toolview docked in the bottom (fairly large picture, feel free to click).


Clicking either the “Select paths” or “Select checkers” buttons shows settings dialogs, not surprisingly you can select paths and chekers in them. The next 2 screenshots shows those.



Finally the result of the analysis is shown in the toolview


All this was in the past. Now the settings can be changed in the per project settings window



The analysis can be started from the Run menu.


The results show up in the problems toolview, the same way that problems detected by the background parser, in a separate tab


Here’s a video showing how it all works


KDevelop Checker Framework – pushed

Hi there!

I’m pleased to announce that the KDevelop Checker Framework has been pushed to the KDevPlatform repository. Here are some details about it:

GUI changes

  • Moved ProblemModel to shell
  • Reworked the Problems toolview. Now it works like this:
    • ProblemModels are added to ProblemModelSet.
    • ProblemReporterFactory makes instances of ProblemsView.
    • ProblemsView takes the models from ProblemModelSet (also subscribes for updates about them, so if one is added or removed it can add/remove their views) and it provides a tabbed widget where the views for them can be added. It creates instances of ProblemTreeView which show the problems in ProblemModel, and adds them to the tabs. Also the tabs shows the number of problems in the ProblemModels.
    • The toolview will only add actions that are supported by the model (for example: filtering, grouping, reparsing, showing imports. Obviously reparsing doesn’t make sense for runtime problem checkers)

See the video:

  • First it shows that the “old” problem reporter still works as intended (which also uses the new code now)
  • Then from 1:07 onward it shows an example problem model/view working with randomly generated test data.
  • It shows the features of the new model(s), that is filtering by files/project and issue severity.
  • It also shows the grouping support (grouping by severity, and path.

ProblemModel details

  • Broke up ProblemModel into 2 parts
    • Base ProblemModel that provides the QAbstractItemModel interface for views and can use various ProblemStores to store problems. By default it uses FilteredProblemStore.
    • ProblemReporterModel is basically the old ProblemModel that grabs problems from DUChain, it’s a subclass of ProblemModel.
  • ProblemStore simply stores problems as a list (well technically it stores them in a tree, but it only has 1 level, so it’s a list). There’s no filtering, no grouping. It’s perfect for ProblemReporterModel since it does filtering itself when grabbing the problems from DUChain.
  • FilteredProblemStore DOES filtering, and grouping itself. It stores problems in a tree (ProblemStoreNode subclasses). The tree structure depends on the grouping method, which is implemented with GroupingStrategy subclasses.
  • Moved WatchedDocumentSet and it’s subclasses from ProblemModel to ProblemStore, as it is really a detail that the model itself doesn’t need, however ProblemStore which stores the problems needs it actually.
  • Created a new Problem class, DetectedProblem and moved both this and the “old” Problem class in under the IProblem interface. The intent here was to create a class with a clear interface for problems, which ProblemStore can simply store. I wanted to eventually clear the problems out of DUChain and replace the “old” Problem class with it. However I realized that it’s not practical because of the “show imports” feature which shows the problems from imported contexts. Unfortunately DUChain is the class that knows those, and it’s way too much work to get it out from it. Not to mention it doesn’t even make sense, since it’s really something that logically belongs there.

Using this new system is fairly straightforward:

All one has to do is instantiate a model, add it to the model set:

KDevelop::ILanguageController *lc =  KDevelop::ICore::self()->languageController();
KDevelop::ProblemModelSet *pms = lc->problemModelSet();
m_model = new KDevelop::ProblemModel(this);
pms->addModel(“Test”, m_model);

Then later inject problems into it:

KDevelop::DetectedProblem *p = new KDevelop::DetectedProblem();
p->setDescription(“Some message”);

Here’s a class diagram about the relevant classes:


kdev-krazy2 ported to KF5

Good news everyone!

The KDevelop frontend for Krazy tools has been ported to KF5, so it now works with the KF5 version of KDevelop.


Installing uw-imapd on Ubuntu 14.04

Today I had to rescue an old server which was running Debian 3.0 Woody. Basically had to (or have to, since I’m still working on it) install a new server, and restore the users, and data, including mail. The easiest way to restore mail messages, mail folders, etc was to use the same IMAP server software, which is UW-Imapd. Unfortunately the latest LTS Ubuntu (14.04) doesn’t provide it, so I had to work around this problem.

It’s really not hard to do so, just had to take the following steps:

First of all, install dependencies

apt-get install inetutils-inetd libc-client2007e mlock

Then grab UW-Imapd from an earlier version of Ubuntu, from this page:


…and install it!

dpkg -i uw-imapd_2007e~dfsg-3.2ubuntu1_amd64.deb

Voil√°! Now the mail can be read in the new system!


KDevelop – Checker framework

Hi there!

So I got a slot for GSOC2015 to implement a “Checker framework” for KDevelop, therefore I have been and I will be working on it during the summer.

The project has 3 phases

  1. Create a framework that problem checker plugin developers can push issues into, so that they don’t have to create their own infrastructure for it (like models, views, toolviews for the views, etc)
  2. Update some of the already existing plugins to use this framework (kdev-krazy, kdev-cppcheck, kdev-valgrind)
  3. Implement 2 new checker tools using the framework (clang-check, pylint).

A little bottom-line explanation:

This framework will basically mean a common (obviously subclassable) model that can be used for storing problems, some infrastructure for holding such models, and views. The model will be a refactored, cleaned up version of the current ProblemModel that is used by the problem reporter plugin. The toolview of that plugin will also be cleaned up and refactored, and provide a better view for the model(s).

Up to now I’ve been already working on creating this framework.

  • Now it is a tabbed view, and the tabs show the number of problems in the currently shown view
  • I’ve also created a class that holds problem models, and those models automatically get a view in a tab in the problem toolview

I am now in the process of refactoring the ProblemModel.

Here are two screenshots comparing the “old” toolview with the “new” one:

20150327_000002297 20150531_000002772

Diagrams with

Right now I am writing up network / system design paper for school, and I desperately needed a diagram tool, that I can use on any platform, and it can create pretty network diagrams. Guess what I’ve found a really good one!

( NOTE: The picture is NOT my actual diagram, just a sketch )


asterisk-gui on Ubuntu 14.10

Good news everyone!

While Ubuntu doesn’t seem to have asterisk-gui in their repository. It’s certainly possible to get it working! All one has to do first is follow this guide.

When that’s done ( the installation part, basically check out from SVN, configure, build, install, no big deal ), you are just a few commands away from a working asterisk-gui!

Unfortunately the make install command installs the web site to the wrong place ( on asterisk at least ). So will have to correct that, and also correct the permissions afterwards:

rm /usr/share/asterisk/static-http
ln -s /var/lib/asterisk/static-http /usr/share/asterisk/static-http
chmod asterisk /var/lib/asterisk -R
chgrp asterisk /var/lib/asterisk -R

Then restart Asterisk, and navigate to the following URL:

After logging in, and start-up configuration, you should see something similar to this:


That’s all folks!