Author: sebastian.brueckner

Description:
After installing the Wikibase extensions via composer (require wikibase/wikibase: *), the MediaWiki installer is broken. Apparently, the Wikibase classes expect the local config to exist even during the installer (where it might not exist yet - as it does in my case).
This is the backtrace:

[dabefbdf] /repo/mw-config/index.php?page=Language Exception from line 93 of /var/www/repo/extensions/Wikibase/repo/Wikibase.hooks.php: Wikibase: Incomplete configuration: $wgWBRepoSettings["entityNamespaces"] has to be set to an array mapping content model IDs to namespace IDs. See ExampleSettings.php for details and examples.

Backtrace:

#0 [internal function]: Wikibase\RepoHooks::onSetupAfterCache()
#1 /var/www/repo/includes/Hooks.php(206): call_user_func_array(string, array)
#2 /var/www/repo/includes/GlobalFunctions.php(4009): Hooks::run(string, array, NULL)
#3 /var/www/repo/includes/Setup.php(527): wfRunHooks(string)
#4 /var/www/repo/includes/WebStart.php(156): require_once(string)
#5 /var/www/repo/mw-config/index.php(29): require(string)
#6 {main}

Version: master
Severity: major