JavaScript Support

[thomasdarimont]

The Nashorn JS engine has eventually been removed in Java 15. This makes the Javascript support not usable with a plain JDK > 14.
However, it is possible to add the self-contained nashorn-core library manually to the $KC_HOME/providers folder.
After a config rebuild (via kc.sh build or --auto-build) one can use the JavaScript support with JDK versions > JDK 14.
I just verified this with the latest JDK 17.

The scripting feature can be enabled with --features=scripts if one wants to be able to edit scripts in the admin ui then enable the upload-scripts feature as well, via --features=scripts,upload-scripts.

I think it would be a good idea to add the JS engine to the distribution by default - once the JDK will be updated to JDK17+, WDYT?

[stianst]

See #9945

[stianst]

Moving this to archive as we already have an issue open to address Nashorn removal related to supporting OpenJDK 17.

[Arulaln-AR]

@thomasdarimont

Need help in enabling the script feature. I have mapped the script feature using the environment variable. Attached is the complete dockerfile. Built an image based on that and still under Authentication - > Add Execution step, I don't see an script option to create Javascript.

Do I need to add the javascript as well under the /opt/keycloak/providers/ during the build stage itself.
Dockerfile.txt