silverstripe-docsviewer/code/extensions/DocumentationStaticPublisherExtension.php

<?php

/**
 * An extension to StaticPublisher to enable exporting the documentation pages
 * as HTML files to the server.
 *
 * If you want to add exporting functionality then install the static publisher
 * module and set the following configuration in your applications config.yml:
 *
 * <code>
 * StaticExporter:
 *   extensions:
 *	   - DocumentationStaticPublisherExtension
 * </code>
 *
 * If you don't plan on using static publisher for anything else and you have 
 * the cms module installed, make sure you disable that from being published. 
 * 
 * Again, in your applications config.yml file
 * 
 * <code>
 * StaticExporter:
 *   disable_sitetree_export: true
 * </code>
 *
 * @package docsviewer
 */
class DocumentationStaticPublisherExtension extends Extension {
	
	public function alterExportUrls(&$urls) {
		// fetch all the documentation pages for all the registered modules
		$modules = DocumentationService::get_registered_entities();

		foreach($modules as $module) {
			foreach($module->getLanguages() as $lang) {
				foreach($module->getVersions() as $version) {

					$pages = DocumentationService::get_pages_from_folder(
						$module,
						false,
						true,
						$version,
						$lang
					);

					if($pages) {
						foreach($pages as $page) {
							$link = $page->getLink(false);

							$urls[$link] = $link;
						}
					}
				}
			}
		}
	}
}