WIP: Bzlmod part the one hundred-thirteenth

Extracted a single `scala_toolchains` macro to share between `WORKSPACE`
and the `deps.bzl` module extension. This will make it easier to ensure
`WORKSPACE` compatibility.

Author: mbland

MODULE.bazel.lock

@@ -1,4 +1,5 @@
-load("//scala:scala.bzl", "scala_binary", "scala_library")
+load("//scala/private:rules/scala_binary.bzl", "scala_binary")
+load("//scala/private:rules/scala_library.bzl", "scala_library")
 load(
     "//scala:scala_cross_version.bzl",
     "default_maven_server_urls",

jmh/jmh.bzl

@@ -1,21 +1,7 @@
 """Exports repos used by @io_bazel_rules_scala rules"""
 
-load("//jmh:jmh.bzl", "jmh_repositories")
-load("//junit:junit.bzl", "junit_repositories")
-load("//scala/private/extensions:toolchains.bzl", "scala_toolchains_repo")
-load("//scala/private:macros/scala_repositories.bzl", "scala_repositories")
-load(
-    "//scala/scalafmt:scalafmt_repositories.bzl",
-    "scalafmt_default_config",
-    "scalafmt_repositories",
-)
+load("//scala/private:macros/toolchains.bzl", "scala_toolchains")
 load("//scala:scala_cross_version.bzl", "default_maven_server_urls")
-load("//scala_proto:scala_proto.bzl", "scala_proto_repositories")
-load("//scalatest:scalatest.bzl", "scalatest_repositories")
-load("//specs2:specs2_junit.bzl", "specs2_junit_repositories")
-load("//testing/private:repositories.bzl", "testing_repositories")
-load("//twitter_scrooge:twitter_scrooge.bzl", "twitter_scrooge")
-load("@io_bazel_rules_scala_config//:config.bzl", "SCALA_VERSIONS")
 
 # The _defaults() and _to_attrs() schema compensates for the fact that there's
 # no way to pull the default value from an `attr` object. Without this, we'd
@@ -41,7 +27,7 @@ _settings = {
             "default": {},
         },
     ),
-    "load_toolchain_dependencies": struct(
+    "load_scala_toolchain_dependencies": struct(
         attr = attr.bool,
         params = {
             "default": True,
@@ -84,12 +70,12 @@ _toolchains_attrs = {
     "scalatest": attr.bool(),
     "junit": attr.bool(),
     "specs2": attr.bool(),
-    "twitter_scrooge": attr.bool(),
-    "jmh": attr.bool(),
-    "scala_proto": attr.bool(),
-    "scala_proto_enable_all_options": attr.bool(),
     "testing": attr.bool(),
     "scalafmt": attr.bool(),
+    "scala_proto": attr.bool(),
+    "scala_proto_enable_all_options": attr.bool(),
+    "twitter_scrooge": attr.bool(),
+    "jmh": attr.bool(),
 }
 
 def _get_root_module(module_ctx):
@@ -167,7 +153,7 @@ def _get_settings(module_ctx):
     scalafmt = _compile_root_tags(module_ctx, "scalafmt", _defaults(_scalafmt))
 
     return (
-        settings["load_toolchain_dependencies"],
+        settings["load_scala_toolchain_dependencies"],
         settings["maven_servers"],
         settings["overridden_artifacts"],
         settings["fetch_sources"],
@@ -235,101 +221,26 @@ def _get_toolchains(module_ctx):
 
 def _scala_deps_impl(module_ctx):
     (
-        load_toolchain_dependencies,
+        load_scala_toolchain_dependencies,
         maven_servers,
         overridden_artifacts,
         fetch_sources,
         validate_scala_version,
         scalafmt_default_config_path,
     ) = _get_settings(module_ctx)
-    compiler_srcjars = _get_scala_compiler_srcjars(module_ctx)
-    toolchains = _get_toolchains(module_ctx)
 
-    scala_repositories(
+    scala_toolchains(
         maven_servers = maven_servers,
-        # Note the internal macro parameter misspells "overriden".
-        overriden_artifacts = overridden_artifacts,
-        load_dep_rules = False,  # MODULE.bazel loads dependencies now.
-        load_jar_deps = load_toolchain_dependencies,
+        overridden_artifacts = overridden_artifacts,
+        load_rules_scala_dependencies = False,  # MODULE.bazel loads these now.
+        load_scala_toolchain_dependencies = load_scala_toolchain_dependencies,
         fetch_sources = fetch_sources,
         validate_scala_version = validate_scala_version,
-        scala_compiler_srcjars = compiler_srcjars,
+        scala_compiler_srcjars = _get_scala_compiler_srcjars(module_ctx),
+        scalafmt_default_config_path = scalafmt_default_config_path,
+        **_get_toolchains(module_ctx)
     )
 
-    if "scalatest" in toolchains:
-        scalatest_repositories(
-            maven_servers = maven_servers,
-            fetch_sources = fetch_sources,
-        )
-
-    for scala_version in SCALA_VERSIONS:
-        if "junit" in toolchains:
-            junit_repositories(
-                maven_servers = maven_servers,
-                scala_version = scala_version,
-                overriden_artifacts = overridden_artifacts,
-                fetch_sources = fetch_sources,
-            )
-        if "specs2" in toolchains:
-            specs2_junit_repositories(
-                maven_servers = maven_servers,
-                scala_version = scala_version,
-                overriden_artifacts = overridden_artifacts,
-                create_junit_repositories = "junit" not in toolchains,
-            )
-        if (
-            "scala_proto" in toolchains or
-            "scala_proto_enable_all_options" in toolchains
-        ):
-            scala_proto_repositories(
-                maven_servers = maven_servers,
-                scala_version = scala_version,
-                overriden_artifacts = overridden_artifacts,
-                register_toolchains = False,
-            )
-
-    if "twitter_scrooge" in toolchains:
-        twitter_scrooge(
-            maven_servers = maven_servers,
-            overriden_artifacts = overridden_artifacts,
-            bzlmod_enabled = True,
-        )
-
-    if "jmh" in toolchains:
-        jmh_repositories(
-            maven_servers = maven_servers,
-            overriden_artifacts = overridden_artifacts,
-            bzlmod_enabled = True,
-        )
-    if "testing" in toolchains:
-        testing_repositories(
-            maven_servers = maven_servers,
-            fetch_sources = False,
-        )
-    if "scalafmt" in toolchains:
-        scalafmt_default_config(scalafmt_default_config_path)
-        scalafmt_repositories(
-            maven_servers = maven_servers,
-            overriden_artifacts = overridden_artifacts,
-            bzlmod_enabled = True,
-        )
-
-    if len(toolchains) != 0:
-        scala_toolchains_repo(
-            scala = "scala" in toolchains,
-            scalatest = "scalatest" in toolchains,
-            junit = "junit" in toolchains,
-            specs2 = "specs2" in toolchains,
-            twitter_scrooge = "twitter_scrooge" in toolchains,
-            jmh = "jmh" in toolchains,
-            scala_proto = "scala_proto" in toolchains,
-            scala_proto_enable_all_options = (
-                "scala_proto_enable_all_options" in toolchains
-            ),
-            testing = "testing" in toolchains,
-            scalafmt = "scalafmt" in toolchains,
-        )
-
 scala_deps = module_extension(
     implementation = _scala_deps_impl,
     tag_classes = {