Bump rules_java to 7.12.2

Updates almost all dependencies on `@bazel_tools//tools/jdk:` toolchain
targets and `.bzl` files to corresponding targets and files in
`@rules_java//toolchains:`. Part of bazel-contrib#1482 and bazel-contrib#1652.

All dependencies on `@bazel_tools//tools/jdk:toolchain_type` remain,
however, as there is not yet a corresponding target in
`@rules_java//toolchains:`.

Adds the `WORKSPACE` stanza recommended in the `rules_java` release
notes, and removes our own calls to instantiate `rules_java` repos and
to register `rules_java` toolchains.

These changes are required to avoid build breakages when updating to
`rules_scala` 7.10.0 and higher. All targets build and all tests pass
under Bazel 6.5.0 and 7.4.1.

---

I was on the right track in my analysis from bazel-contrib#1619 ("Bump to
rules_java 7.9.0 for Bazel 7 compatibility" in the message for
commit cd22d88). However, I thought we
_shouldn't_ update any targets from `@bazel_tools//tools/jdk:` to
`@rules_java//toolchains:`. That's why I thought we were stuck on
`rules_java` 7.9.0.

However, this comment from @fmeum made me think switching to
`@rules_java//toolchains:` actually is the preferred approach:

- bazelbuild/rules_java#214 (comment)

So this is a potentially breaking change, but in the good kind of way,
in that it requires an easy, future proof update.

Author: mbland

WORKSPACE

@@ -5,6 +5,12 @@ load("//scala:deps.bzl", "load_rules_dependencies")
 
 load_rules_dependencies()
 
+load("@rules_java//java:repositories.bzl", "rules_java_dependencies", "rules_java_toolchains")
+
+rules_java_dependencies()
+
+rules_java_toolchains()
+
 load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
 
 bazel_skylib_workspace()
@@ -130,16 +136,4 @@ load("//scala/private/extensions:dev_deps.bzl", "dev_deps_repositories")
 
 dev_deps_repositories()
 
-# Copied from bazel_tools/tools/jdk/remote_java_repository.bzl.
-[
-    register_toolchains(
-        "@remotejdk21_" + platform + "_toolchain_config_repo//:all",
-    )
-    for platform in [
-        "linux",
-        "macos",
-        "win",
-    ]
-]
-
 register_toolchains("//test/toolchains:java21_toolchain_definition")

jmh/jmh.bzl

@@ -69,7 +69,7 @@ scala_generate_benchmark = rule(
             ),
         ),
         "runtime_jdk": attr.label(
-            default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
+            default = Label("@rules_java//toolchains:current_java_runtime"),
             providers = [java_common.JavaRuntimeInfo],
         ),
     },
@@ -90,7 +90,10 @@ def scala_benchmark_jmh(**kw):
     testonly = kw.get("testonly", False)
     scalacopts = kw.get("scalacopts", [])
     main_class = kw.get("main_class", "org.openjdk.jmh.Main")
-    runtime_jdk = kw.get("runtime_jdk", "@bazel_tools//tools/jdk:current_java_runtime")
+    runtime_jdk = kw.get(
+        "runtime_jdk",
+        "@rules_java//toolchains:current_java_runtime",
+    )
 
     scala_library(
         name = lib,

scala/deps.bzl

@@ -36,9 +36,9 @@ def load_rules_dependencies():
         http_archive,
         name = "rules_java",
         urls = [
-            "https://github.com/bazelbuild/rules_java/releases/download/7.9.0/rules_java-7.9.0.tar.gz",
+            "https://github.com/bazelbuild/rules_java/releases/download/7.12.2/rules_java-7.12.2.tar.gz",
         ],
-        sha256 = "41131de4417de70b9597e6ebd515168ed0ba843a325dc54a81b92d7af9a7b3ea",
+        sha256 = "a9690bc00c538246880d5c83c233e4deb83fe885f54c21bb445eb8116a180b83",
     )
 
     maybe(

scala/private/common_attributes.bzl

@@ -29,7 +29,7 @@ common_attrs_for_plugin_bootstrapping = {
     "resource_strip_prefix": attr.string(),
     "resource_jars": attr.label_list(allow_files = True),
     "java_compile_toolchain": attr.label(
-        default = Label("@bazel_tools//tools/jdk:current_java_toolchain"),
+        default = Label("@rules_java//toolchains:current_java_toolchain"),
         providers = [java_common.JavaToolchainInfo],
     ),
     "scalacopts": attr.string_list(),
@@ -82,10 +82,10 @@ common_attrs.update({
 
 implicit_deps = {
     "_java_runtime": attr.label(
-        default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
+        default = Label("@rules_java//toolchains:current_java_runtime"),
     ),
     "_java_host_runtime": attr.label(
-        default = Label("@bazel_tools//tools/jdk:current_host_java_runtime"),
+        default = Label("@rules_java//toolchains:current_host_java_runtime"),
     ),
     "_scalac": attr.label(
         executable = True,

scala/private/extensions/dev_deps.bzl

@@ -2,10 +2,8 @@
 
 load("//scala:scala_cross_version.bzl", "default_maven_server_urls")
 load("//scala:scala_maven_import_external.bzl", "java_import_external")
-load("//test/toolchains:jdk.bzl", "remote_jdk21_repositories")
 load("//third_party/repositories:repositories.bzl", "repositories")
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
-load("@rules_java//java:repositories.bzl", "remote_jdk8_repos")
 
 _BUILD_TOOLS_RELEASE = "5.1.0"
 
@@ -45,10 +43,6 @@ def dev_deps_repositories(
         testonly_ = True,
     )
 
-    # We need to select based on platform when we use these
-    # https://github.com/bazelbuild/bazel/issues/11655
-    remote_jdk8_repos()
-
     repositories(
         fetch_sources = fetch_sources,
         for_artifact_ids = [
@@ -73,5 +67,3 @@ def dev_deps_repositories(
         ],
         maven_servers = maven_servers,
     )
-
-    remote_jdk21_repositories()

scala/private/rule_impls.bzl

@@ -14,7 +14,7 @@
 """Rules for supporting the Scala language."""
 
 load("@bazel_skylib//lib:paths.bzl", "paths")
-load("@bazel_tools//tools/jdk:toolchain_utils.bzl", "find_java_toolchain")
+load("@rules_java//toolchains:toolchain_utils.bzl", "find_java_toolchain")
 load(":common.bzl", "rlocationpath_from_rootpath", _collect_plugin_paths = "collect_plugin_paths")
 load(":resources.bzl", _resource_paths = "paths")
 

scala/private/rules/scala_binary.bzl

@@ -58,7 +58,7 @@ _scala_binary_attrs = {
     "classpath_resources": attr.label_list(allow_files = True),
     "jvm_flags": attr.string_list(),
     "runtime_jdk": attr.label(
-        default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
+        default = Label("@rules_java//toolchains:current_java_runtime"),
         providers = [java_common.JavaRuntimeInfo],
     ),
 }

scala/private/rules/scala_junit_test.bzl

@@ -79,7 +79,7 @@ _scala_junit_test_attrs = {
     ),
     "jvm_flags": attr.string_list(),
     "runtime_jdk": attr.label(
-        default = Label("@bazel_tools//tools/jdk:current_java_runtime"),
+        default = Label("@rules_java//toolchains:current_java_runtime"),
         providers = [java_common.JavaRuntimeInfo],
     ),
     "env": attr.string_dict(default = {}),

scala/scala_import.bzl

@@ -146,7 +146,7 @@ scala_import = rule(
             default = Label("@io_bazel_rules_scala//scala/settings:stamp_scala_import"),
         ),
         "java_compile_toolchain": attr.label(
-            default = Label("@bazel_tools//tools/jdk:current_java_toolchain"),
+            default = Label("@rules_java//toolchains:current_java_toolchain"),
         ),
     },
     toolchains = ["@bazel_tools//tools/jdk:toolchain_type"],

scala/scalafmt/phase_scalafmt_ext.bzl

@@ -24,7 +24,9 @@ ext_scalafmt = {
             executable = True,
         ),
         "_java_host_runtime": attr.label(
-            default = Label("@bazel_tools//tools/jdk:current_host_java_runtime"),
+            default = Label(
+                "@rules_java//toolchains:current_host_java_runtime",
+            ),
         ),
         "_runner": attr.label(
             allow_single_file = True,

scala_proto/private/scala_proto_aspect.bzl

@@ -209,10 +209,12 @@ def _scala_proto_aspect_impl(target, ctx):
 def make_scala_proto_aspect(*extras):
     attrs = {
         "_java_toolchain": attr.label(
-            default = Label("@bazel_tools//tools/jdk:current_java_toolchain"),
+            default = Label("@rules_java//toolchains:current_java_toolchain"),
         ),
         "_java_host_runtime": attr.label(
-            default = Label("@bazel_tools//tools/jdk:current_host_java_runtime"),
+            default = Label(
+                "@rules_java//toolchains:current_host_java_runtime",
+            ),
         ),
     }
     return aspect(

test/BUILD

@@ -479,7 +479,7 @@ scala_binary(
     name = "scala_binary_jdk_11",
     srcs = ["ScalaBinaryJdk11.scala"],
     main_class = "scalarules.test.ScalaBinaryJdk11",
-    runtime_jdk = "@bazel_tools//tools/jdk:remote_jdk11",
+    runtime_jdk = "@rules_java//toolchains:remote_jdk11",
 )
 
 # Make sure scala_library respects java_compile_toolchain during builds
@@ -782,14 +782,14 @@ scala_library(
         "src/main/scala/scalarules/test/junit/runtime_platform/JunitRuntimePlatformTest.java",
     ],
     # make sure java compilation toolchain matches runtime toolchain ie --target
-    java_compile_toolchain = "@bazel_tools//tools/jdk:toolchain_java11",
+    java_compile_toolchain = "@rules_java//toolchains:toolchain_java11",
     deps = ["@io_bazel_rules_scala_junit_junit"],
 )
 
 scala_junit_test(
     name = "JunitRuntimePlatform_test_runner",
     size = "small",
-    runtime_jdk = "@bazel_tools//tools/jdk:remote_jdk11",
+    runtime_jdk = "@rules_java//toolchains:remote_jdk11",
     suffixes = ["Test"],
     tests_from = [":JunitRuntimePlatform"],
     runtime_deps = [":JunitRuntimePlatform"],

test/jmh/BUILD

@@ -63,7 +63,7 @@ scala_benchmark_jmh(
 scala_benchmark_jmh(
     name = "test_jmh_jdk11",
     srcs = ["TestJmhRuntimeJdk11.scala"],
-    runtime_jdk = "@bazel_tools//tools/jdk:remote_jdk11",
+    runtime_jdk = "@rules_java//toolchains:remote_jdk11",
 )
 
 [sh_test(

test/shell/test_twitter_scrooge.sh

@@ -7,10 +7,10 @@ runner=$(get_test_runner "${1:-local}")
 scrooge_compile_with_jdk_11() {
     # javabase and java_toolchain parameters are deprecated and may be
     # removed in Bazel >= 5.0.0
-    bazel build --javabase=@bazel_tools//tools/jdk:remote_jdk11 \
-        --host_javabase=@bazel_tools//tools/jdk:remote_jdk11 \
-        --host_java_toolchain=@bazel_tools//tools/jdk:toolchain_java11 \
-        --java_toolchain=@bazel_tools//tools/jdk:toolchain_java11 \
+    bazel build --javabase=@rules_java//toolchains:remote_jdk11 \
+        --host_javabase=@rules_java//toolchains:remote_jdk11 \
+        --host_java_toolchain=@rules_java//toolchains:toolchain_java11 \
+        --java_toolchain=@rules_java//toolchains:toolchain_java11 \
         --javacopt='--release 11' \
         --java_language_version=11 \
         --tool_java_language_version=11 \

test/src/main/resources/java_sources/BUILD

@@ -5,11 +5,11 @@ package(default_visibility = ["//visibility:public"])
 scala_library(
     name = "CompiledWithJava8",
     srcs = ["SimpleJavaSourceFileA.java"],
-    java_compile_toolchain = "@bazel_tools//tools/jdk:toolchain_java8",
+    java_compile_toolchain = "@rules_java//toolchains:toolchain_java8",
 )
 
 scala_library(
     name = "CompiledWithJava11",
     srcs = ["SimpleJavaSourceFileB.java"],
-    java_compile_toolchain = "@bazel_tools//tools/jdk:toolchain_java11",
+    java_compile_toolchain = "@rules_java//toolchains:toolchain_java11",
 )

test/toolchains/BUILD.bazel

@@ -1,6 +1,6 @@
 load("//scala:scala_toolchain.bzl", "scala_toolchain")
 load(
-    "@bazel_tools//tools/jdk:default_java_toolchain.bzl",
+    "@rules_java//toolchains:default_java_toolchain.bzl",
     "BASE_JDK9_JVM_OPTS",
     "DEFAULT_JAVACOPTS",
     "DEFAULT_TOOLCHAIN_CONFIGURATION",

test/toolchains/jdk.bzl

@@ -1,5 +1,8 @@
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
-load("@bazel_tools//tools/jdk:remote_java_repository.bzl", "remote_java_repository")
+load(
+    "@rules_java//toolchains:remote_java_repository.bzl",
+    "remote_java_repository",
+)
 
 def remote_jdk21_repositories():
     maybe(

twitter_scrooge/twitter_scrooge.bzl

@@ -435,7 +435,9 @@ common_attrs = {
             ),
         ],
     ),
-    "_java_host_runtime": attr.label(default = Label("@bazel_tools//tools/jdk:current_host_java_runtime")),
+    "_java_host_runtime": attr.label(
+        default = Label("@rules_java//toolchains:current_host_java_runtime"),
+    ),
 }
 
 common_aspect_providers = [
@@ -475,7 +477,9 @@ scrooge_java_aspect = aspect(
     attrs = dicts.add(
         common_attrs,
         {
-            "_java_toolchain": attr.label(default = Label("@bazel_tools//tools/jdk:current_java_toolchain")),
+            "_java_toolchain": attr.label(default = Label(
+                "@rules_java//toolchains:current_java_toolchain",
+            )),
         },
     ),
     provides = [ScroogeAspectInfo],