Frameworks/Epics/Splitting kdelibs

kdelibs splitting epic

Important Forewords

If you are working on splitting a framework, make sure to consult our list of common issues. It will give you an overview of the solutions you're supposed to use to deal with some of the dependencies.

Also, when splitting out a framework, it is part of being done to comply with the KDE Frameworks Policies, it will also need to follow this Epic Policies. Any framework in the staging area cannot move to its final place without following those policies.

And last but not least, if you create a new framework, please consider being its maintainer as well. We need people to ensure the stewardship of all the frameworks.

Existing frameworks

Definition of done:

• No dependency on kde4support, kdecore, kdeui, kio, kparts...
• All unused dependencies are removed
• Tier1 modules depend only on Qt modules
• Library name is in CamelCase
• Modularized CMakeLists.txt [using extra-cmake-modules (ECM)]
• Installs a Config.cmake file for itself
• Does not install any Find*.cmake modules itself
• Calls feature_summary at the end of the toplevel CMakeLists.txt (see kcoreaddons for an example)
• All Find*.cmake modules needed by the framework and used also by other frameworks have been upstreamed to extra-cmake-modules (via the kde-buildsystem mailing list) or directly to cmake (via the cmake list). To make sure of this, do not append to CMAKE_MODULE_PATH, but set it.
• Does not set EXECUTABLE_OUTPUT_PATH anymore.
• Follows the policy on directory organization
• Unit tested
• Maintains source compatibility over kdelibs
• Does not use any Q_WS_* defines.
• Does not include config.h.
• Does not use QObject::tr() static calls, but only use QCoreApplication::translate(), tr() in a non-static way, or i18n() if the framework depends on ki18n.
• Document all dependencies in CMakeList between frameworks (example in kauth)

Status	Framework	Tier	Type	Maintainer	Comment
DONE	itemmodels	Tier 1	Functional	Stephen Kelly
DONE	kdbusaddons	Tier 1	Functional	Kevin Ottens
DONE	kplotting	Tier 1	Functional	Benjamin Port
DONE	solid	Tier 1	Integration	Àlex Fiestas
DONE	threadweaver	Tier 1	Functional	Mirko Boehm
DONE	kauth	Tier 2	Integration	Dario Freddi
DONE	kcoreaddons	Tier 1	Functional	Romain Perier/David Faure
DONE	kwindowsystem	Tier 1	Integration	Martin Graesslin
DONE	karchive	Tier 1	Functional	Mario Bensi
DONE	kconfig	Tier 1	Functional	David Faure	Contains KConfigGui + KConfigCore
DONE	kidletime	Tier 1	Integration	Dario Freddi
DONE	kservice	Tier 3	Solution	David Faure	in staging, tier 3 because of ki18n, could be tier2 otherwise
DONE	itemviews	Tier 1	Functional	Aurélien Gâteau
DONE	kguiaddons	Tier 1	Functional	Martin Klapetek
DONE	kjobwidgets	Tier 2	Functional	Kevin Ottens
DONE	kjs	Tier 1	Functional	David Faure
DONE	ki18n	Tier 2	Functional	Chusslove Illich
DONE	kemoticons	Tier 3	Solution	David Gil
DONE	xmlgui	Tier 3	Integration	Àlex Fiestas
DONE	sonnet	Tier 1	Functional	Martin Sandsmark	Contains SonnetCore + SonnetUi
DONE	frameworkintegration	Tier 4	N/A	Kevin Ottens
DONE	kio	Tier 3	Solution	David Faure	incomplete, will contain KIOCore + KIOWidgets
DONE	knotifications	Tier 2	Integration	Aleix Pol
DONE	kde4support	Tier 4	N/A	Kevin Ottens
DONE	kde4attic	Tier 4	N/A	Kevin Ottens	It's gone, dismantled
DONE	kcodecs	Tier 1	Functional	Stephen Kelly
DONE	kwidgetsaddons	Tier 1	Functional	Stephen Kelly
DONE	kcompletion	Tier 2	Functional	Aleix Pol
DONE	kconfigwidgets	Tier 3	Functional	Aurélien Gâteau
DONE	kcrash	Tier 2	Solution	Martin Klapetek
DONE	kdoctools	Tier 2	Solution	Aleix Pol
DONE	kiconthemes	Tier 3	Solution	Àlex Fiestas	kpixmapsequence moved to kwidgetaddons
DONE	kinterprocesswindowing	Splitted in kwidgetsaddons and kwindowsystem	Integration	Aurélien Gâteau
DONE	ktextwidgets	Tier 3	Functional	Martin Klapetek
DONE	kunitconversion	Tier 3	Functional	Aleix Pol
DONE	kwallet	Tier 2	Integration	Valentin Rusu
DONE	plasma-framework	Tier 3	Solution	Aaron Seigo, Marco Martin	libplasma2 already well under way need to identify and break out candidates that belong in lower tiers (e.g. ConfigReader -> kconfigxt++) QGraphicsView and QML libraries Eventually the runtime bits from kde-runtime and the Plasma QML pieces Source compat is priority, but more relaxed than the rest of Frameworks as QML destroys any realistic possibility of that Porting notes Various identified issue/improvements to be made
DONE	kbookmarks	Tier 3	Functional	Kevin Ottens	Uses xmlgui and kconfigwidgets
DONE	kcmutils	Tier 4	N/A	David Edmundson	In staging
DONE	kprintutils	Tier 3	?	David Edmundson and Martin Klapetek
DONE	kparts	Tier 3	Functional	Aleix Pol
DONE	dnssd	Tier 2	Integration	Aleix Pol	Tier2 because the mDnssd backend depends on KConfig. It should probably be stripped out
DONE	kdeclarative	Tier 3	?	Aleix Pol
DONE	kdesu	Tier 3	?	Martin Klapetek
DONE	kdewebkit	Tier 3	Functional	Aleix Pol
DONE	khtml	Tier 4	?	David Edmundson	Right now in khtml
DONE	kssl	Tier ?	?	David Faure	Right now in kio/kssl
DONE	kjsembed	Tier 3	?	Aleix Pol
DONE	knewstuff	Tier 3	?	Jeremy Whiting	Right now in knewstuff
DONE	kpty	Tier 3	?	David Edmundson	{{{5}}}
DONE	kross	Tier 3	?	Vishesh Handa	Right now in staging/kross - Tests failing
DONE	kded	Tier 3	Solution	Àlex Fiestas
DONE	kinit	Tier 3	?	Aleix Pol	In staging
DONE	knotifyconfig	Tier 3	?	David Edmundson	In staging
DONE	kmediaplayer	Tier 3	?	Alex Merry	TESTS! Replace/augment D-Bus interface using MPRIS2? Above may need some new virtuals Default Phonon-based part.

Backlog

For reference, find the class by class analysis produced during Platform11 on the kdelibs dependencies page

This list is non-final, hence why it is not integrated in the table above, when the scope of a lib gets defined and worked on, it is removed from this list and go in the table above.

Yet to be produced frameworks (foreseen tier and type, not set in stone):

• ...

And probably more...

Finalization tasks

To be executed to complete the epic when all the frameworks are "done":

• Make sure it builds and runs against Qt 5.2 final
• Split into its own git module; pre-existing history will remain in the kdelibs repository and be accessible with git graft
• Produce a script or cmake file to recreate a kdeexamples tarball out of a set of examples directory in the frameworks

Policies

Strive for Source Compatibility

Avoid removing API from the frameworks branch, even if it is replaced or deprecated. Prefer to implement the old API in terms of the new API.

In some cases this is very easy. For example, many APIs in KGlobal will be replaced as part of the frameworks effort.

• KGlobal::charsets() -> KCharsets::charsets()
• KGlobal::dirs() -> KStandardDirs::global() (or something?)
• KGlobal::ref() / KGlobal::deref() -> QEventLoopLocker

etc.

Removing this API from KGlobal is not necessary in most cases, and it introduces a porting burden which is best avoided.

There is unlikely to be a 1:1 mapping of old API to new API in every case, so how to implement the old API may not always be obvious. However, attempting to ensure that the older API remains useful should be at the front of our efforts and standards in the frameworks branch.

Binary compatibility policy relaxed

During the execution of this epic, the binary compatibility contraints from the global policy list is lifted.