>bq. Just out of curiosity: If I exclude the dependency on oldcore, does that mean, that the oldcore package won't end up on my airgapped xwiki? Would that not prevent the extension from working?
xwiki-platform-oldcore is always part of the XWiki WAR (and will probably be for quite a while) and will never end up in your XIP (provided you configured the XIP plugin to skip xwiki-platform-distribution-war-dependencies). The problem is that Maven and the Enforcer plugin don't really know about that and, before the XIP plugin is executed, resolve ldap-authenticator dependencies the usual way (which makes it resolve oldcore 8.4 and its transitive dependencies, since that's what is indicated in the pom).
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