Kexi/Porting to Qt&KF 5: Difference between revisions

Revision as of 23:03, 28 May 2015

Note

Draft. Based on notes from the Calligra 2014 Sprint. Each step leads to compiling (running?) state.
Started by jstaniek (talk) 19:06, 7 July 2014 (CET).

The grand plan:

[75%, builds, example runs] Port ~~Predicate~~KDb↓ lib to Qt 5
[97%] Move koproperty lib from calligra to a separate #KProperty↓ repo, make it Qt-only and port to Qt5
[30%] Move koreport lib from calligra to a separate #KReport↓ repo, make it Qt-only and port to Qt 5
1. Remove scripting or port scripting?
Port Kexi (without KexiDB/calligradb, reporting, koproperty, koreport) to Qt 5 and port Kexi to KDb and the new kproperty/kreport
1. Reimplement report scripting using a simple solution to keep backward compatibility with Kexi 2 (see Scripting::*, KRScriptConstants, KRScriptDraw, KRScriptDebug)
2. Remove then unused calligradb lib and parts of KexiDB lib
Improve Kexi stability after porting
-- Kexi 3.0 release here --
Add tests and/or examples to KReport, make it easier to understand as a framework
1. Port some code from Kexi Reports (e.g. KexiReportView [1]) to KReport
Make KReport lib dependent on KDb and remove code/API that becomes redundant (e.g. KoReportData)
Add a new scripting module
Use the module in Kexi Reports too, keeping backward compatibility with Kexi 2 scripting (add unit tests before porting to be very sure that compatibility is kept)

Rules

Kexi's port itself is kept with other Calligra apps in the framework branch. During this time master branch is frozen to avoid merge conflicts. After a successful port of all planned code, we'll be back to development in master for unstable code and calligra-3.x for 3.x stable code.
Use personal git scratch repos to avoid stress with buildbreaks and unnecessary BUG/review notifications
Synchronize with (boud's?) branch of the Qt5 port. Boud's advice: My approach is more like, run each of montel's scripts, fix twhat's wrong, then go on. It's not something that's easy to paralellize.
Don't run astyle on the code, it pollutes history, and astyle-kdelibs is a bit broken
Based on "Porting notes" below, keep porting of one aspect in one commit to simplify reviews
Use the reviewboard for reviews
Use kde-dev-scripts.git porting scripts, in particular
- convert-to-cmake-automoc.pl
Libs that are separate repos should use the framework template (see Links) and be ported to this layout (for now it's just kdb, kproperty, kreport).

TODO...

Notes and Status

TODO: publish detailed checklist (in a spreadsheet?)

Dependencies

Please read all this section carefully before taking action.

Qt 5. Get >=5.2 stable version from your distro, not forgetting about development packages (headers). If you feel you want it, build Qt 5, but it's usually not necessary extra work.
CMake: version >=2.8.12+ and 3.x are both supported. Get it from your distro (recommended) or build it.
KDE Frameworks 5 (KF5) are needed as build-time and run-time dependencies for Calligra, Kexi and our frameworks (KProperty, etc).
Use the kdesrc-build tool to conveniently build KF5. Building by hand in an option if you accept extra work usually not needed for our development (see Frameworks/Building/Details).
There is the Adjust the paths step. For Kexi development (and Calligra in general) it's good to re-use paths that we already use, see the [[Calligra/Building#Recommended_Setup|Recommended setup of the Calligra build instructions. This means that recommendation for the kdesrc-buildrc config file is:

 source-dir /home/YOU/kde/src
 build-dir /home/YOU/kde/build
 kdedir /home/YOU/kde/inst5

Note

If you used /home/YOU/kde/inst as a dir the Calligra 2.x and other kdelibs4-based software, do not mix it with the Calligra 3.x+ and other kf5-based software, otherwise you can experience crashes or other strange behaviour. Use /home/YOU/kde/inst5 for example.

Speed up: before using the KF5 with kdesrc-build, edit the kf5-qt5-build-include file and comment these lines if you don't want to build the workspace, applications and KDEPIM. This way only include kf5-frameworks-build-include lefts.

include kf5-workspace-build-include include kf5-applications-build-include include kf5-kdepim-build-include

In particular, the kdesrc-build will install extra CMake Modules: [2], which is needed to make our software able to find the KF5 components at build time.

KDb

Download/Build/Release info → Predicate.
Our target version is 1.0.0.
To avoid conflicts, Qt 4 version kept for reference, has version 0.0.0.
Depends only on system libraries and Qt, so it's a tier 1 framework
Windows and Mac-specific matters.
Porting to Qt 5 started by Wojtek Kosowicz (Jan 2015)
Porting to Qt 5/Mac OS X started by Wojtek Kosowicz too (Jan 2015)
Directory structure reorganized according to recommendations --Jstaniek (talk) 20:59, 23 February 2015 (UTC)
A temporary repo: git clone kde:clones/predicate/staniek/work predicate

Branches:

kdb - official Qt 5 branch, all platforms, always stable (once we port it)

qt4 - old Qt4-based master moved there, stable but won't be maintained

To have it build on that branch please export qt5 install dir

export QTDIR=<path to your qt5 install dir, or qtbase build dir if using uninstalled>
export PATH=$QTDIR:$PATH

qt5mac-kosowicz - Wojtek's Qt 5/Mac OS X

kproperty

Our target version is 1.0.0 and KProperty project in Playground/Libs category of KDE projects
Depends on system libraries and Qt, plus minor deps on KF5WidgetsAddons/KF5GuiAddons for some editors; later we may move this dependency to a plugin (so the core would stay Qt-only)
Official git repo: kproperty, master branch (use: git clone kde:kproperty)
Directory structure reorganized according to recommendations --Jstaniek (talk) 20:59, 23 February 2015 (UTC)

kreport

Our target version is 1.0.0 and KReport project in Playground/Libs category of KDE projects
To avoid conflicts, Qt 4 version kept for reference, has version 0.0.0.
Depends on system libraries, Qt, and KProperty (tier 1), so it's a tier 2 framework, some deps on KF5WidgetsAddons (may be moved to a plugin so the core would stay Qt-only)
Official git repo: kreport, master branch (use: git clone kde:kreport)
Directory structure reorganized according to recommendations --Jstaniek (talk) 20:59, 23 February 2015 (UTC)
Deps from calligra libs (copied, renamed): KoRuler, KoUnit

Porting scripts usage status

These porting scripts from the kf5 dir of the kde:kde-dev-scripts repo would be applied.
Legend: - = not run, + = run, N = not applicable, T = TODO(we know it's needed)

KDb | KProperty | KReport | Kexi | script-name
+ + + + adapt_cmakelists_file.pl
+ + + + adapt_knewstuff3_includes.pl
+ + + + add_missing_kpart_include.pl
+ + + + clean-forward-declaration.sh
+ + + - clean-includes.sh
N N N - cmakelists_install_vars.pl (N/A because KDb/KProperty/KReport don't use KDE_*DIR variables)
N N N N convert-kabc-to-kcontacts.pl (unused)
+ + + - convert-kaction.pl
+ + + - convert-kbuttongroup.pl
T + + - convert-kcmdlineargs.pl
+ + + - convert-kcolordialog.pl
+ + + - convert-kdebug.pl
N N N - convert-kdebug-with-argument.sh (N/A because KDb/KProperty/KReport don't use that)
N + N - convert-kdialog.pl (helps but KProperty is largery broken by this script)
- - - - convert-kdoublenuminput.pl
- - - - convert-kfiledialog.pl
- - - - convert-kfontcombobox.pl
- - - - convert-kicon.pl
- - - - convert-kimageio.pl
- - - - convert-kintnuminput.pl
- - - - convert-kintspinbox.pl
- - - - convert-kjob.pl
- - - - convert-klineedit.pl
- - - - convert-klistwidget.pl
- - - - convert-klocale-formatdate.pl
- - - - convert-kmd5.pl
- - - - convert-kmenubar.pl
- - - - convert-kmenu.pl
- - - - convert-kmimetype.pl
- - - - convert-kprogressdialog.pl
- - - - convert-kpushbutton.pl
- - - - convert-ksavefile.pl
- - - - convert-ksharedptr.pl
- - - - convert-kshortcut.pl
- - - - convert-ksplashscreen.pl
- - - - convert-kstandarddirs.pl
- - - - convert-ktabwidget.pl
- - - - convert-ktempdir.pl
- - + - convert-ktemporaryfile.pl
- - - - convert-ktextbrowser.pl
- - + - convert-kurl.pl
- - - - convert-kvbox.pl
- - - - convert-qkdebug-to-qcdebug.sh
- - - - convert-qt5.pl
- - - - convert-to-cmake-automoc.pl
- - - - convert-to-k4aboutdata.pl
- - - - convert-to-new-signal-slot-signal.pl
- - - - dnssd-to-kdnssd.sh
- - - - fix-ecm-install-icons.pl
- - - - fix-kcm-module-desktop-file.sh
- - - - install_forwarding_headers.pl
- - - - port-kauthactions.pl
- - - - port_to_autogenerate_export_header.sh
- - - - remove-kde4support.pl
- - - - remove_virtual_prefix.pl
- - - - resolve_kuit.py
- - - - search-kdelibs4support-header.sh
+ + + + frameworks/plasma-framework/src/tools/port-cmake-style.sh
+ + + - frameworks/plasma-framework/src/tools/port-qslots.sh
+ + + - frameworks/plasma-framework/src/tools/port-includes.sh

Git surgery

(Jstaniek (talk) 09:54, 23 February 2015 (UTC)) Repos are prepared by history rewrites such as:

git filter-branch --prune-empty -f --tree-filter \
'(mkdir -p src;mv Predicate src/predicate;mv Drivers src/drivers) 2> /dev/null || true' -- HEAD

Links

Calligra 3.0 Porting Plan
Calligra 3.0 Porting Notes
Kexi tasks at todo.kde.org (KDE Identity needed), public read-only view
Predicate tasks at todo.kde.org (KDE Identity needed), public read-only view
Framework repository template - use for creating new frameworks
- real world examples: KDiagram (recommended because it's a Calligra project -- next-gen kdchart, kdgantt), KArchive (tier 1), KIO (tier 3), KImageFormats plugins
http://www.proli.net/2014/06/21/porting-your-project-to-qt5kf5/
- CMake porting script port-cmake.sh

Docs

Background

Notes from the 2014 Sprint Meeting