[6.2.0]Expose cc_proto_aspect as a toplevel symbol. (bazelbuild#17980)

* Expose cc_proto_aspect as a toplevel symbol.

PiperOrigin-RevId: 520619683
Change-Id: Ief39fdc3ea9083c22fbf12d2b4ba79482c3c16bf

* Update CcRules.java

* Revert change

* Revert change

* Revert

* Update exports.bzl

---------

Co-authored-by: Googler <[email protected]>
Co-authored-by: keertk <[email protected]>

Author: 3 people

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

@@ -65,6 +65,7 @@ public void init(ConfiguredRuleClassProvider.Builder builder) {
     GraphNodeAspect graphNodeAspect = new GraphNodeAspect();
     builder.addConfigurationFragment(CppConfiguration.class);
     builder.addStarlarkAccessibleTopLevels("CcSharedLibraryInfo", Starlark.NONE);
+    builder.addStarlarkAccessibleTopLevels("cc_proto_aspect", Starlark.NONE);
     builder.addBuildInfoFactory(new CppBuildInfo());
 
     builder.addNativeAspectClass(graphNodeAspect);

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

@@ -17,9 +17,12 @@
 load("@_builtins//:common/java/java_library.bzl", "java_library")
 load("@_builtins//:common/java/java_plugin.bzl", "java_plugin")
 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")
+
+exported_toplevels = {
+  "cc_proto_aspect": cc_proto_aspect
+}
 
-exported_toplevels = {}
 exported_rules = {
     "java_library": java_library,
     "java_plugin": java_plugin,

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

@@ -256,7 +256,7 @@ 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"],
@@ -290,7 +290,7 @@ 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.parseAbsoluteUnchecked("@_builtins//:common/cc/cc_proto_library.bzl"),
-          "_cc_proto_aspect");
+          "cc_proto_aspect");
 
   @Before
   public void setUp() throws Exception {