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KBibTeX/Development
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== Various Useful Resources ==
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The following links refer to other web pages or resources relevant for the development of KBibTeX.
* [https://invent.kde.org/office/kbibtex Invent] (KDE's GitLab instance)
* [https://phabricator.kde.org/project/view/176/ Phabricator project page]
* [https://bugs.kde.org/buglist.cgi?bug_status=UNCONFIRMED&bug_status=CONFIRMED&bug_status=ASSIGNED&bug_status=REOPENED&bug_status=NEEDSINFO&bug_status=VERIFIED&order=changeddate%20DESC%2Cpriority%2Cbug_severity&product=KBibTeX&query_format=advanced Bug reports]
* [https://build.kde.org/job/Extragear/job/kbibtex/ Continuous Integration] (build.kde.org)
** [https://binary-factory.kde.org/job/KBibTeX_Nightly_win64/ Nightly builds for Windows] (binary-factory.kde.org)
** [https://build.neon.kde.org/job/merger_kbibtex/ KDE Neon] (build.neon.kde.org)
* [https://ebn.kde.org/krazy/reports/extragear/office/kbibtex/index.html English Breakfast Network]
A quick and easy method to fetch, compile, and run KBibTeX from Git, i.e. the lastest code from {{path|master}} branch, is to get the [https://invent.kde.org/thomasfischer/kbibtex-related/-/raw/master/run/run-kbibtex.sh?inline=false {{path|run-kbibtex.sh}}] Bash script from [https://invent.kde.org/thomasfischer/kbibtex-related/-/tree/master/run Thomas Fischer's 'KBibTeX-related' Git repository].
To run the script, either make it executable and run it via {{Input|./run-kbibtex.sh}} or invoke it via {{Input|bash run-kbibtex.sh}}
The script will by default clone KBibTeX's Git repository into a temporary directory, compile it, install it in a temporary directory, and launch this temporary installation of KBibTeX.
The script does not need to be run as root or with sudo. It will not make any permanent modifications on your system. In order to compile KBibTeX, various tools and development libraries must be available beforehand, e.g. installed via the distribution's package management system.
There is a [https://invent.kde.org/thomasfischer/kbibtex-related/-/raw/master/run/README.txt README.txt] file explaining the script in greater detail.
KBibTeX's sources are available through KDE's Git infrastructure, the repository's name is {{path|kbibtex}}. How to clone a Git repository is explained in the [https://techbase.kde.org/Development/Git/Recipes#Cloning_a_Repository Git Recipes in TechBase]. In short, run the following command in your terminal:
You can browse KBibTeX's source code at [https://invent.kde.org/office/kbibtex KDE's GitLab instance].
Main development happens in the ''master branch'' (named {{path|master}}). It is an objective that this branch is functional and mostly stable, although it is not guaranteed. Use this branch to enjoy new features.
For releases, ''release branches'' are created. The naming scheme is {{path|kbibtex/}}''versionnumber'', where ''versionnumber'' may be something like {{path|0.6}}. Actual releases are tagged commits ('tags') within such a branch, for example {{path|v0.5.1}}. There won't be branches for bug fix releases, e.g. no {{path|kbibtex/0.6.1}}.
For bugs or features that require multiple commits and where individual commits may break {{path|master}} or a release branch, so-called ''feature branches'' are used. These branches are supposed to track {{path|master}} (typical for features) or a release branch (typical for bugs). Branches for bugs are meant to be merged into the release branch where the bug was reported for as well as into the master branch (for future releases). Feature branches are merged into the master branch, in selected cases into releases branches where no release has been tagged yet, and only in rare cases back-ported to release branches with published releases. An example for a feature branch would be {{path|feature/zotero}}, which may contain the code for an improved Zotero support. Names for bug report-related branches are {{path|bugs/}}''bugsystemnumber'' (for example {{path|bugs/kde338375}}) , where ''bugsystem'' would be {{path|kde}} or the name of a Linux distribution and ''number'' the actual bug number. Feature branches start with {{path|feature/}} followed by a short descriptive name for this feature (all lowercase, no spaces). Merged branches will be delete after some time.
The following instructions provide information how to compile KBibTeX on the command line. Instructions are similar but differ slightly between KDE4-based builds (e.g. branch {{path|kbibtex/0.5}}) and KDE Frameworks 5-based builds (e.g. branch {{path|master}}). When compiling KBibTeX from inside of an IDE like KDevelop or Qt Creator, those settings have to be applied as well.
KBibTeX is configured using CMake. There are a few options relevant for the configuration of this project:
# <code>CMAKE_INSTALL_PREFIX:PATH</code> specifies the installation location. There are a number of choices available for this option:
## The location of your KDE installation, for example {{Path|/usr}}. The commands <code>kde4-config --prefix</code> (compiling for KDE4) or <code>kf5-config --prefix</code> (compiling for KDE Frameworks 5) print this location. Picking this option most likely will require root permissions (e. g. via sudo) for the actual installation. Caution: This choice will interfere with the package management.
## A directory outside the package management's control, for example {{Path|/usr/local}}. Requires setting some environment variables as explained below. This installation stays available across reboots and is available to all users. Picking this option most likely will require root permissions (e. g. via sudo) for the actual installation.
## A user-writable directory like {{Path|/tmp/usr}} or {{Path|~/usr}}. Similar to above choice, it requires setting some environment variables, but no root permissions. Many distributions are configured to clean {{Path|/tmp}} on reboot.
# <code>CMAKE_BUILD_TYPE</code> determines the amount of debug information included in the final code. Regular users may set it to <code>release</code>, developers to <code>debug</code>, and for step-by-step debugging <code>debugfull</code> works best. All available options are discussed in the [https://techbase.kde.org/Development/CMake/Addons_for_KDE#Buildtypes CMake documentation in TechBase].
A complete example looks like this:
{{Input|1=cmake -DCMAKE_INSTALL_PREFIX:PATH=/tmp/usr -DCMAKE_BUILD_TYPE=debug ../kbibtex}}
GNU Make is the default choice for source code compilation. The number of parallel processes should be specified to shorten the time to finish on multi-core systems. The priority of the compilation tasks may get reduced.
To make use of [https://ninja-build.org/ ninja], the <code>cmake</code> statement above has to include the argument <code>-GNinja</code>. Combining both cmake and ninja may look like this:
{{Input|1=cmake -GNinja -DCMAKE_INSTALL_PREFIX:PATH=/tmp/usr -DCMAKE_BUILD_TYPE=debug ../kbibtex && ninja}}
KBibTeX uses KDE's KParts technology, which requires you to install some libraries. KBibTeX may not run properly if the following steps are omitted.
Running
{{Input|make install}}
will install KBibTeX into the directory as specified as installation prefix earlier. Depending on your choice of installation prefix, this statement has to be run with sudo or alike.
Unless the installation prefix equals the KDE install directory, the following environment variables have to be specified. You may set the variables temporarily in an active shell session, permanently setting them in your shell's configuration, or create a small shell script that both sets those variables and then launches your custom KBibTeX installation.
# '''Only for KDE4''': Set variable <code>KDEDIRS</code> to include the KDE installation directory and KBibTeX's installation directory, for example {{Path|/usr:/tmp/usr}}
# '''Only for KF5''': Set variable <code>QT_PLUGIN_PATH</code> to include the plugin directory inside the library directory of KBibTeX's installation directory, for example {{Path|/usr/lib/plugins:/usr/lib/qt5/plugins:/tmp/usr/lib64/plugins/}}
# Set variable <code>LD_LIBRARY_PATH</code> to the library directory inside KBibTeX's installation directory, for example {{Path|/tmp/usr/lib64}}
# Set variable <code>XDG_DATA_DIRS</code> to include the shared data directories of the KDE installation directory, KBibTeX's installation directory, and other relevant prefixes, for example {{Path|/usr/share:/usr/local/share:/tmp/usr/share}}
Run <code>kbuildsycoca4</code> (KDE4) or <code>kbuildsycoca5</code> (KDE Frameworks 5) to make the KDE subsystem aware of the new libraries.
{{attention|KBibTeX consists of the actual program and a number of libraries. To avoid undefined behavior, it is important to uninstall any other KBibTeX installations (e.g. those done via the Linux distribution's package management system) and to remove any remaining KBibTeX libraries (e.g. those files found anywhere under {{Path|/usr}}) that match the pattern {{Path|*kbibtex*.so*}}.}}
A number of pages in [https://techbase.kde.org TechBase], [https://userbase.kde.org UserBase], and [https://community.kde.org Community] discuss using Git for source code management. This section shows some examples how Git is used for KBibTeX.
In below example, replace {{path|xxxx}} with a short and concise name for a feature to be developed (as discussed above). Branches for bugs are created similarly, but follow the scheme {{path|bugs/kdeNNNN}}, where NNNN is the bug number in [https://bugs.kde.org KDE's bug tracker]. Bugs in other bug trackers such as [https://gna.org/bugs/?group=kbibtex Gna!] or your distribution may use a different prefix such as {{path|bugs/gnaNNNN}} or {{path|bugs/gentooNNNN}}.
To minimize polluting the official KBibTeX repository or when you do not have write access, you may push your local branches to another Git repository to allow others to inspect your changes. In below example, {{path|personalpublicclone}} is your personal, public Git repository where you want to push to.
Others can add your repository to their local clone of KBibTeX's git and clone your branch (assuming in this example it is located on KDE's Git server):
{{Input|git remote add someonespublicclone git@git.kde.org:clones/kbibtex/NAME/kbibtex # run once
git fetch someonespublicclone feature/xxxx && git checkout feature/xxxx # every time to get updates
git remote rm someonespublicclone && git checkout master && git branch -D feature/xxxx # to erase branch}}
{{Input|git checkout kbibtex/0.6 # be in right branch
git pull --ff-only # get latest changes from origin
git status # just check that everything is ok
git tag -s -u GPGKEY -m "Tagging 0.6" v0.6 # actual tagging, GnuPG signed
git push --tags # explicitly push tag to origin}}
{{Info|This section describes how to create releases based on KDE4 (kdelibs4). It will not work for KDE Frameworks 5.}}
To create a release, use the Ruby scripts from the {{path|git.kde.org:releaseme.git}} repository. KBibTeX's package generation is configured through files {{path|kbibtex.rb}} and {{path|kbibtexrc}}. Configure those files or invoke {{path|kbibtex.rb}} with the correct arguments, such as:
{{Input|1=sha512sum kbibtex-0.6.0.tar.xz >kbibtex-0.6.0.tar.xz.sha512
gpg --default-key GPGKEY --output kbibtex-0.6.0.tar.xz.sha512.asc --detach-sign --armor kbibtex-0.6.0.tar.xz.sha512
gpg --default-key GPGKEY --output kbibtex-0.6.0.tar.xz.asc --detach-sign --armor kbibtex-0.6.0.tar.xz}}
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