configure classpath with jdtls

[thkoch2001]

I'm working on an Ant project (YaCy) and want to tell jdtls where to look for dependent libraries. I've put the following in .dir-locals.el

((java-mode
  . ((eglot-workspace-configuration
      . (:jdtls
         (:java.project.referencedLibraries
          (:include "lib/*.jar")
                 ))))))

eglot-show-workspace-configuration reports:

{
  "jdtls": {
    "java.project.referencedLibraries": {
      "include": "lib/*.jar"
    }
  }
}

But this doesn't do anything. Imports are still marked as resolvable and eglot-events-buffer does not contain the string "referencedLibraries".

I've looked at these resources for help:

• Configuring eglot with Eclipse jdtls #888
• https://joaotavora.github.io/eglot/#Customizing-Eglot
• Allow to specify external dependencies via LSP configuration eclipse-jdtls/eclipse.jdt.ls#1859
• Library "Attach Source" has to be done everytime redhat-developer/vscode-java#1946 (comment)
• Quick question:Possibility of extending to manually support external library eclipse-jdtls/eclipse.jdt.ls#2305 (comment)

[thkoch2001]

This answer will probably help with my question:
#59 (comment)

However I actually worked around the problem by changing .project and .classpath in the project:
thkoch2001/yacy_search_server@27acedd

jdtls apparently does not support ivy.

From looking at the jdtls source code it also seems, that jdtls automatically includes lib if there is no .classpath and no configuration from the lsp client.