Unable to build java with Bazel following README.md

[KoningR]

What version of protobuf and what language are you using?
Version: protobuf-30.0-rc2
Language: Java

What operating system (Linux, Windows, ...) and version?
MacOS Sequoia 15.3.1

What runtime / compiler are you using (e.g., python version or gcc version)
Bazel 8.1.0-homebrew

What did you do?
Steps to reproduce the behavior:

1. Download and unzip protobuf-30.0-rc2.zip and source code from release.
2. Following the README:
   2.1 Move bin and include to protobuf-30.0-rc2/src
   2.2 cd java
   2.2 ../src/bin/protoc --java_out=core/src/main/java -I../src ../src/google/protobuf/descriptor.proto
   2.3 bazel build //java:release

What did you expect to see
Successful build

What did you see instead?
ERROR: /Users/xxx/Documents/protobuf-30.0-rc2/java/BUILD.bazel:4:1: name 'sh_test' is not defined (did you mean 'cc_test'?)
WARNING: Target pattern parsing failed.
ERROR: Skipping '//java:release': no such target '//java:release': target 'release' not declared in package 'java' defined by /Users/xxx/Documents/protobuf-30.0-rc2/java/BUILD.bazel
ERROR: no such target '//java:release': target 'release' not declared in package 'java' defined by /Users/xxx/Documents/protobuf-30.0-rc2/java/BUILD.bazel
INFO: Elapsed time: 0.069s
INFO: 0 processes.
ERROR: Build did NOT complete successfully

Anything else we should know about your project / environment
I am following the instructions specified in protobuf-30.0-rc2/java/README.md and am unable to build for Java.

[zhangskz]

Note that our release and CI have not been fully migrated to use Bazel 8 yet as of v30.0-rc2 (this is in progress), so building from source using Bazel 8 may not work yet. But we should have coverage when used via Bazel build rules from another Bazel modules:

Bazel 8 splits out several rules from bazel into their own modules, which we'll need to update in our code-base (e.g. sh_test, rules_jvm_external dep bump)

For now, would recommend building from source using Bazel 7, or using the Bazel build rules: http://google3/third_party/protobuf/github/.github/workflows/test_bazel.yml;l=30;rcl=721946253