How to become a MediaWiki hacker/de-formal

Dieser Artikel wurde geschrieben, um Entwicklern zu helfen, die notwendigen Fähigkeiten für die Entwicklung des MediaWiki-Kerns und MediaWiki-Erweiterungen zu erwerben.
 * In den meisten Fällen bei der Arbeit mit MediaWiki wollen Sie den MediaWiki-Kern nicht hacken, es sei denn, Sie wissen wirklich, was Sie tuen.

Der Hauptweg, um mit der Wikimedia-Entwicklung zu beginnen, ist 'an Wikimedia-Projekten, die Mentoring anbieten, mitzuarbeiten. Eine Alternative ohne Mentoring ist es, einen guten ersten Fehler zu beheben.

Wenn Sie ein erfahrener Entwickler mit MediaWiki-Erfahrung sind, besuchen Sie stattdessen .

Für andere Möglichkeiten, um sich in der Wikimedia-Gemeinschaft zu engagieren, siehe .

Überblick
MediaWiki ist die Software, die Wikipedia, ihre Schwesterprojekte und Tausende von Wikis in der ganzen Welt betreibt.

Obwohl MediaWiki in PHP programmiert ist, sind einige Hilfs-Tools in anderen Sprachen geschrieben, so z. B. Stapelverarbeitungsdateien, Shellskripte, Makefiles und Python. . Es wird jQuery als Client-JavaScript-Bibliothek eingesetzt.

MediaWiki is primarily written for the LAMP platform and runs on most operating systems. MediaWiki benutzt hauptsächlich MySQL- oder MariaDB-Datenbanken.

Die Entwicklung geschieht im Stile von open source. Dies wird größtenteils online koordiniert und von der Wikimedia-Foundation unterstützt, freiwillige Entwickler tragen jedoch ebenfalls einen großen Teil bei.

Die allgemeine Mailingliste der Entwickler ist wikitech-l. The main developer IRC channels are and.
 * Development discussion happens on various mailing lists and IRC channels.
 * Source code is stored on and managed using the Git revision control system and can be viewed here
 * Code-Durchsichten werden auf durchgeführt und können hier angesehen werden. Follow this tutorial to set up Git and Gerrit in order to submit patches.
 * Bug reports are filed and projects are coordinated on and can be viewed here

Diese Seite soll zeigen, wie man sich zum Projekt MediaWiki beitragen kann. Dies ist kein Lernprogramm, sondern nur eine Liste einiger Punkte, die Sie zu verschiedenen Orten führen, zu denen man hingehen kann, um das zu lernen, was notwendig ist.

Set up your development environment
Die meisten Projekte verwenden Git und Gerrit. Folgen Sie dem Gerrit-Tutorial, um Ihr Entwicklerkonto einzurichten. Danach können Sie fortfahren, um Code herunterzuladen, Änderungen vorzunehmen, diese zu testen und Patches einzureichen. There are two ways to set up your development environment: using a pre-configured virtual machine setup (Docker or Vagrant), or a manual configuration approach.

Docker development environment

 * MediaWiki Docker – Führen Sie MediaWiki aus mit Docker (kann auf Linux, Windows oder macOS als Hauptrechner genutzt werden). This is the recommended method.

You can also try the experimental mwcli tool which provides basic orchestration functionality for MediaWiki docker containers.

Virtuelle Maschine mit Vagrant

 * Vagrant installation — These steps will install MediaWiki server with all the requirements inside a Linux virtual machine (can be used on Linux, Windows, or Mac hosts).

Vagrant is a powerful tool, but it is more complex and less robust than Docker, and significantly more resource-intensive. It is mainly aimed at developers who need to set up complex, flexible environments, e.g. for testing the interaction of multiple extensions.

Manual installation

 * Installation requirements — Check hardware requirements, and install a LAMP, MAMP or WAMP server (Linux, Mac or Windows, plus Apache, MySQL/MariaDB and PHP).
 * — Download the latest source code from Git.
 * — Continue with the installation and initial configuration.
 * Set up the various debug modes in your environment to display warning and errors early.

It's not necessary to download Wikipedia database dumps in order to develop MediaWiki features. In fact, in many cases it's easier to use a near-empty database with a few specially-crafted test pages. However, if for some reason you want to have a copy of Wikipedia, you can get a dump.

PHP
MediaWiki is written in PHP, so you'll need to get familiar with PHP to hack MediaWiki's core.


 * Learn PHP
 * PHP tutorial — Available in many different languages. If you have no knowledge of PHP but know how to program in other object-oriented programming languages, PHP will be easy for you to learn.
 * PHP Programming at Wikibooks.
 * PHP at Wikiversity.


 * PHP resources :
 * The PHP manual — Available in many different languages.
 * PHP coding conventions within the MediaWiki community.


 * Stuff to know :
 * The script  in MediaWiki provides a basic PHP interpreter with MediaWiki objects and classes loaded.
 * Also, the script  in MediaWiki is a replacement of   based on PsySH, see

Database
Many features require some amount of database manipulation, so you'll often need to be familiar with MySQL/MariaDB.


 * Learn MySQL/MariaDB
 * MySQL tutorial — From the MySQL reference manual.
 * MySQL at Wikibooks.


 * MySQL/MariaDB resources
 * MySQL Reference Manuals — Available in many different languages.
 * MariaDB Knowledge Base
 * Database coding conventions within the MediaWiki community.


 * Stuff to know :
 * Test your code with MySQL/MariaDB.
 * MediaWiki currently uses MySQL and MariaDB as the primary database back-end. It also supports other DBMSes, such as PostgreSQL and SQLite. However, almost all developers use MySQL/MariaDB and don't test other DBs, which consequently break on a regular basis. You're therefore advised to use MySQL/MariaDB when testing patches, unless you're specifically trying to improve support for another DB. In the latter case, make sure you're careful not to break MySQL/MariaDB (or write queries that are horribly inefficient in it), since MySQL/MariaDB is what everybody else uses.

JavaScript and CSS
JavaScript and CSS have become omnipresent in front-end code. You don't have to be familiar with JavaScript, jQuery and CSS to work on MediaWiki, but you might need to, depending on what you choose to work on.


 * Learn JavaScript and CSS
 * JavaScript and CSS at Wikibooks.
 * Getting Started with jQuery — A jQuery tutorial.
 * Learning JavaScript — references and sources.


 * JavaScript and CSS resources
 * JavaScript coding conventions within the MediaWiki community.
 * CSS coding conventions within the MediaWiki community.

MediaWiki
The MediaWiki code base is large and some parts are ugly; don't be overwhelmed by it. When you're first starting off, aim to write features or fix bugs which only touch a small region of code.


 * MediaWiki basics and must-reads :
 *  — A high-level overview of the main components of MediaWiki and how they work with each other.
 *  — An overview of why and how to write secure code.


 * MediaWiki resources :
 * — A list of important files and links to more detailed information.
 * — A list of hooks. If you're trying to find what part of the codebase does something, often a good place to start is by searching for the related hooks.
 * — An overview of general coding conventions within the MediaWiki community.


 * Code documentation ( class reference ) — Automatically generated documentation from the code and code comments.
 * — A guide to debugging MediaWiki.
 * — A tool to interact with MediaWiki objects live.

MediaWiki extensions
If you choose to work on MediaWiki extensions code, the following links provide more information.


 * MediaWiki extensions basics:
 * Developing extensions — How to write an extension for MediaWiki.
 * Extension writing tutorial


 * MediaWiki extensions resources:
 * Best practices for extensions
 * A brief introduction to MediaWiki extension development — A video presentation about how to create a MediaWiki extension (slides).
 * Making a MediaWiki extension — Covers how to develop an extension for MediaWiki, best practices, and how to engage the MediaWiki community. From February 2011.
 * Help for extension developers on the Developer Hub