Tracking: Remove old / unused JDK derivations

[jlesquembre]

Part of #313216

Issue description

Currently, we have multiple JDK flavors:

• OpenJDK
• AdoptOpenJDK
• OracleJDK
• Temurin
• Zulu
• GraalVM
• JetBrains JDK
• Corretto

There might be others as well. Please let me know if I missed anything.

With the goal of simplifying the JDK infrastructure on nixpkgs, I suggest:

• Removing AdoptOpenJDK
• Hiding all the openjdkXX-bootstrap packages from the top level

Can we also remove OracleJDK? I'm not sure if it's needed anymore.

I also believe we could remove Zulu if we are able to compile OpenJDK forDarwin.

[willcohen]

I think this sounds good. Re Oracle SDK, I personally do not use it, but is there a use case for people who would want to deploy that install via NixOS if they are purchasing support from Oracle? My initial thought is that that'd something which a user of paid software would handle on their own. For anyone using the software free of charge, OpenJDK seems like it should suffice just fine.

[tomodachi94]

OracleJDK is gone as of #353043. I know that @emilazy had opinions about which JDKs to keep and which to drop into the abyss.

[emilazy]

I believe AdoptOpenJDK is already gone, and the Oracle JDK definitely is. Zulu can indeed go once we have OpenJDK/OpenJFX on Darwin, although we’d lose JDK 8 on aarch64-darwin, which I think is acceptable. (Alternatively we could keep Zulu for bootstrap and ditch Temurin.) Graal is its whole own thing so I don’t have an opinion on it although IIRC @thiagokokada was planning on not maintaining it any more. I believe the JetBrains products require their JDK so it should probably be maintained by maintainers of JetBrains products in Nixpkgs. I don’t personally see the point of Corretto since AFAICT it’s just a vanilla OpenJDK build like ours and Temurin but apparently @rollf does :)

[emilazy]

Oh and there’s also Semeru. I assume some people want OpenJ9 although presumably we could build our own instead.

[tomodachi94]

I believe AdoptOpenJDK is already gone

Yes, that appears to be the case. We have adoptopenjdk-icedtea-web, which I'm not sure about.

I don’t personally see the point of Corretto since AFAICT it’s just a vanilla OpenJDK build like ours and Temurin but apparently @\rollf does :)

I agree, though I'm curious about Rolf's opinion (I'm not familiar with Corretto).

[rollf]

I mentioned my reasoning here. The short version is: if the build infra structure locks down the jdk, you can't use an alternative. Whether/Why the build infra should lock that down is an entirely different topic 🤷 .

[emilazy]

Yeah, I’d personally lean towards just patching such requirements out – it’s less invasive than some of the things we have to do to get software working with Nix – but I can understand if organizational conservatism prevents that.