Expose cc_proto_aspect as a toplevel symbol.

PiperOrigin-RevId: 520619683
Change-Id: Ief39fdc3ea9083c22fbf12d2b4ba79482c3c16bf

Author: buildbreaker2021

src/main/java/com/google/devtools/build/lib/bazel/rules/CcRules.java

@@ -66,6 +66,7 @@ public void init(ConfiguredRuleClassProvider.Builder builder) {
     builder.addConfigurationFragment(CppConfiguration.class);
     builder.addStarlarkAccessibleTopLevels("CcSharedLibraryInfo", Starlark.NONE);
     builder.addStarlarkAccessibleTopLevels("CcSharedLibraryHintInfo", Starlark.NONE);
+    builder.addStarlarkAccessibleTopLevels("cc_proto_aspect", Starlark.NONE);
     builder.addBuildInfoFactory(new CppBuildInfo());
 
     builder.addNativeAspectClass(graphNodeAspect);

src/main/starlark/builtins_bzl/bazel/exports.bzl

@@ -18,7 +18,7 @@ load("@_builtins//:common/java/java_library.bzl", "JAVA_LIBRARY_ATTRS", "bazel_j
 load("@_builtins//:common/java/java_plugin.bzl", "java_plugin")
 load("@_builtins//:common/java/java_import.bzl", "java_import")
 load("@_builtins//:common/java/proto/java_proto_library.bzl", "java_proto_library")
-load("@_builtins//:common/cc/cc_proto_library.bzl", "cc_proto_library")
+load("@_builtins//:common/cc/cc_proto_library.bzl", "cc_proto_aspect", "cc_proto_library")
 load(":bazel/java/bazel_java_binary_wrapper.bzl", "java_binary", "java_test")
 load("@_builtins//:common/python/py_binary_macro.bzl", "py_binary")
 load("@_builtins//:common/python/py_library_macro.bzl", "py_library")
@@ -32,6 +32,7 @@ exported_toplevels = {
         bazel_java_library_rule = bazel_java_library_rule,
         JAVA_LIBRARY_ATTRS = JAVA_LIBRARY_ATTRS,
     ),
+    "cc_proto_aspect": cc_proto_aspect,
 }
 exported_rules = {
     "java_library": java_library,

src/main/starlark/builtins_bzl/common/cc/cc_proto_library.bzl

@@ -255,7 +255,7 @@ def _aspect_impl(target, ctx):
         providers.append(header_provider)
     return providers
 
-_cc_proto_aspect = aspect(
+cc_proto_aspect = aspect(
     implementation = _aspect_impl,
     attr_aspects = ["deps"],
     fragments = ["cpp", "proto"],
@@ -289,7 +289,7 @@ cc_proto_library = rule(
     implementation = _impl,
     attrs = {
         "deps": attr.label_list(
-            aspects = [_cc_proto_aspect],
+            aspects = [cc_proto_aspect],
             allow_rules = ["proto_library"],
             allow_files = False,
         ),

src/test/java/com/google/devtools/build/lib/rules/cpp/proto/CcProtoLibraryTest.java

@@ -51,7 +51,7 @@ public class CcProtoLibraryTest extends BuildViewTestCase {
   private final StarlarkAspectClass starlarkCcProtoAspect =
       new StarlarkAspectClass(
           Label.parseCanonicalUnchecked("@_builtins//:common/cc/cc_proto_library.bzl"),
-          "_cc_proto_aspect");
+          "cc_proto_aspect");
 
   @Before
   public void setUp() throws Exception {