SitemapOnTheFly is a MediaWiki extension that allows generation of sitemaps on the fly, when visiting some arbitrary page (/sitemap.xml for example). It handles both the index - that is, a list of all sitemaps available - and individual sitemap pages showing the actual pages.

Usage

Whilst this extension handles generating the actual sitemaps, some extra work is required in respect of pointing your webserver to the actual file.

• First, load the extension - wfLoadExtension('SitemapOnTheFly')
• The extension has one configuration variable, $wgSitemapNamespaces which is an array of namespaces which should be shown in the sitemap; you may either pass numerical values [ 0, 6 ], or MediaWiki constants [ NS_MAIN, NS_FILE ], it doesn't matter. Custom namespaces will obviously have to be numerical.
• Create a sitemap.php file, this will need to load MediaWiki's WebStart.php, and will need to conditionally load either the index, or the individual sitemap pages depending on the URL:

You can see an example of Telepedia's production setup for this, here. Point NGINX or Apache at it, and you should be grand. If you go down a different path, note that you should generally ensure you call define( 'MW_NO_SESSION', 1 ); to disable MediaWiki sessions and save a bit of bandwith - sessions are not relevant for sitemaps.