http://zh.wikipedia.beta.wmflabs.org/wiki/Special:Import lists a bunch of sources, but for Wikibooks there is only es, and for Wikipedia zh and en (and many more) are missing. For template and gadget developers, it would be convenient to be able to import stuff from production environment. I don't have permission to test on other beta cluster wikis but can guess they are under similar situation.
Description
Event Timeline
Import sources are generated by getLocalDatabases()
https://gerrit.wikimedia.org/r/plugins/gitiles/operations/mediawiki-config/+/6a5b86b5bbbee5bf407c1b3c12b7237533205e2e/wmf-config/import.php#47
Defined in
https://gerrit.wikimedia.org/g/operations/mediawiki-config/+/6a5b86b5bbbee5bf407c1b3c12b7237533205e2e/wmf-config/CommonSettings.php#193
It loads all-labs.dblist instead of all.dblist
https://gerrit.wikimedia.org/r/plugins/gitiles/operations/mediawiki-config/+/refs/heads/master/dblists/all-labs.dblist
I don't think we want to add more snowflakes to the beta cluster's mediawiki configuration.
@Majavah It's allow to import pages from any production wikis before. So it's a bug-report ticket instead of configuration-request ticket.
Note the real import sources are production wikis instead of other beta wikis. Generating import sources from all-labs.dblist is wrong.