MediaWiki

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MediaWiki is a PHP-powered web application used by the Gentoo wiki and the various Wikimedia Project websites (including Wikipedia).

Installation

Prerequisites

  • Install PHP. Enable the xmlreader USE flag, because MediaWiki requires it:
root #echo "dev-lang/php xmlreader" >> /etc/portage/package.use
  • Install MySQL (MariaDB is a suitable alternative). Create a database for MediaWiki:
root #mysql -u root -p
mysql> CREATE DATABASE IF NOT EXISTS `mediawiki` DEFAULT CHARACTER SET `utf8` COLLATE `utf8_unicode_ci`;
mysql> CREATE USER 'mediawiki'@'localhost' IDENTIFIED BY 'changeme';
mysql> GRANT SELECT, INSERT, UPDATE, DELETE, CREATE, DROP, INDEX, ALTER ON `mediawiki`.* TO 'mediawiki'@'localhost' IDENTIFIED BY 'changeme';
mysql> \q

www-apps/mediawiki

USE flags for www-apps/mediawiki The MediaWiki wiki web application (as used on wikipedia.org)

imagemagick Enable optional support for the ImageMagick or GraphicsMagick image converter
mysql Add mySQL Database support
postgres Add support for the postgresql database
sqlite Add support for sqlite - embedded sql database
vhosts Add support for installing web-based applications into a virtual-hosting environment

Install www-apps/mediawiki:

root #emerge --ask www-apps/mediawiki

Setup

  • Copy mediawiki files from /usr/share/webapps/mediawiki/{version}/htdocs to /var/www/localhost/htdocs/mediawiki
  • Point your browser at http://127.0.0.1/mediawiki and follow the instructions.
    • If you do not have a GUI on the computer running mediawiki, then log in from another machine using http://<server>/mediawiki instead, where <server> is the name or IP address of the server (see /etc/hosts).
  • Page "Welcome to MediaWiki!":
    • "Database name" is "mediawiki"
    • "Database username" is "mediawiki"
    • "Database password" is "changeme" (or what else you have setup)
  • Page "Connect to database":
    • Database character set" should be "UTF-8"
  • Page "Name"
    • "Name of wiki" has to be set
    • Setup admin user and password
  • Page "Complete!"
    • Download your LocalSettings.php configuration and move it to /var/www/localhost/htdocs/mediawiki/LocalSettings.php.
  • Point your browser at http://127.0.0.1/mediawiki/ (or the address you used above) to see your installed and configured wiki.

Advanced configuration

add this somewhere (does not matter exactly where):

FILE /var/www/localhost/htdocs/mediawiki/LocalSettings.php
$wgArticlePath = "/wiki/$1"; 
$wgUsePathInfo = true;

and add this between <Directory> tags:

FILE /etc/apache2/vhosts.d/default_vhost.include
RewriteEngine On
RewriteRule ^/?wiki(/.*)?$ %{DOCUMENT_ROOT}/mediawiki/index.php [L]
  • By default the landing page in MediaWiki is unlocked for anyone to edit. Login as admin. By the top right of the page is an arrow that points down, click it and the 3rd option down is "protect" to lock down the page.
  • Set an avatar for your wiki. Add to the bottom of /var/www/localhost/htdocs/mediawiki/LocalSettings.php:
FILE /var/www/localhost/htdocs/mediawiki/LocalSettings.php
$wgLogo = "/mediawiki/wiki.png";

External resources