We have several people over the last weeks try to set up Wikibase in connection with a client. A significant part of them is running into issues with setting up working sitelinks in order to make the parser functions etc work. We need to document this well.
* Easily findable documentation about how to make sitelinks work in a 3rd party Wikibase installation
* Current documation is 100% accurate
* The general installation guide that people work with includes the relevant steps / links to the relevant steps (nd doesn't duplicate info)
Current documentation seems to exist @ https://www.mediawiki.org/wiki/Wikibase/Installation/Advanced_configuration#Direct_access_and_SiteLinks
Currently people seem to get the the end of https://www.mediawiki.org/wiki/Wikibase/Installation#Run_the_setup_scripts an expect sitelinks to work but they do not.
Also see: https://www.mediawiki.org/wiki/Wikibase/Installation#There_are_no_sites_I_can_link_pages_to_in_an_item
Some people do not use the populate sites script they instead add things to the table themselves, https://phabricator.wikimedia.org/T205922#4987444
Perhaps we should also tie this into the documentation so that the populate sites script can also be avoided?