[bazel] Move Objective-C runtime into //objectivec

Removing language-specific targets from the top-level BUILD file
will allow users to keep their workspaces smaller and easier to
maintain by not depending on language rules they don't need.

Similar work was done for Java in #7190.

BUILD

@@ -954,96 +954,13 @@ proto_lang_toolchain(
 
 alias(
     name = "objectivec",
-    actual = ":protobuf_objc",
+    actual = "//objectivec",
     visibility = ["//visibility:public"],
 )
 
-objc_library(
+alias(
     name = "protobuf_objc",
-    hdrs = [
+    actual = "//objectivec",
-        "objectivec/GPBAny.pbobjc.h",
-        "objectivec/GPBApi.pbobjc.h",
-        "objectivec/GPBDuration.pbobjc.h",
-        "objectivec/GPBEmpty.pbobjc.h",
-        "objectivec/GPBFieldMask.pbobjc.h",
-        "objectivec/GPBSourceContext.pbobjc.h",
-        "objectivec/GPBStruct.pbobjc.h",
-        "objectivec/GPBTimestamp.pbobjc.h",
-        "objectivec/GPBType.pbobjc.h",
-        "objectivec/GPBWrappers.pbobjc.h",
-        "objectivec/GPBArray.h",
-        "objectivec/GPBBootstrap.h",
-        "objectivec/GPBCodedInputStream.h",
-        "objectivec/GPBCodedOutputStream.h",
-        "objectivec/GPBDescriptor.h",
-        "objectivec/GPBDictionary.h",
-        "objectivec/GPBExtensionInternals.h",
-        "objectivec/GPBExtensionRegistry.h",
-        "objectivec/GPBMessage.h",
-        "objectivec/GPBProtocolBuffers.h",
-        "objectivec/GPBProtocolBuffers_RuntimeSupport.h",
-        "objectivec/GPBRootObject.h",
-        "objectivec/GPBRuntimeTypes.h",
-        "objectivec/GPBUnknownField.h",
-        "objectivec/GPBUnknownFieldSet.h",
-        "objectivec/GPBUtilities.h",
-        "objectivec/GPBWellKnownTypes.h",
-        "objectivec/GPBWireFormat.h",
-        "objectivec/google/protobuf/Any.pbobjc.h",
-        "objectivec/google/protobuf/Api.pbobjc.h",
-        "objectivec/google/protobuf/Duration.pbobjc.h",
-        "objectivec/google/protobuf/Empty.pbobjc.h",
-        "objectivec/google/protobuf/FieldMask.pbobjc.h",
-        "objectivec/google/protobuf/SourceContext.pbobjc.h",
-        "objectivec/google/protobuf/Struct.pbobjc.h",
-        "objectivec/google/protobuf/Timestamp.pbobjc.h",
-        "objectivec/google/protobuf/Type.pbobjc.h",
-        "objectivec/google/protobuf/Wrappers.pbobjc.h",
-        # Package private headers, but exposed because the generated sources
-        # need to use them.
-        "objectivec/GPBArray_PackagePrivate.h",
-        "objectivec/GPBCodedInputStream_PackagePrivate.h",
-        "objectivec/GPBCodedOutputStream_PackagePrivate.h",
-        "objectivec/GPBDescriptor_PackagePrivate.h",
-        "objectivec/GPBDictionary_PackagePrivate.h",
-        "objectivec/GPBMessage_PackagePrivate.h",
-        "objectivec/GPBRootObject_PackagePrivate.h",
-        "objectivec/GPBUnknownFieldSet_PackagePrivate.h",
-        "objectivec/GPBUnknownField_PackagePrivate.h",
-        "objectivec/GPBUtilities_PackagePrivate.h",
-    ],
-    copts = [
-        "-Wno-vla",
-    ],
-    includes = [
-        "objectivec",
-    ],
-    non_arc_srcs = [
-        "objectivec/GPBAny.pbobjc.m",
-        "objectivec/GPBApi.pbobjc.m",
-        "objectivec/GPBDuration.pbobjc.m",
-        "objectivec/GPBEmpty.pbobjc.m",
-        "objectivec/GPBFieldMask.pbobjc.m",
-        "objectivec/GPBSourceContext.pbobjc.m",
-        "objectivec/GPBStruct.pbobjc.m",
-        "objectivec/GPBTimestamp.pbobjc.m",
-        "objectivec/GPBType.pbobjc.m",
-        "objectivec/GPBWrappers.pbobjc.m",
-        "objectivec/GPBArray.m",
-        "objectivec/GPBCodedInputStream.m",
-        "objectivec/GPBCodedOutputStream.m",
-        "objectivec/GPBDescriptor.m",
-        "objectivec/GPBDictionary.m",
-        "objectivec/GPBExtensionInternals.m",
-        "objectivec/GPBExtensionRegistry.m",
-        "objectivec/GPBMessage.m",
-        "objectivec/GPBRootObject.m",
-        "objectivec/GPBUnknownField.m",
-        "objectivec/GPBUnknownFieldSet.m",
-        "objectivec/GPBUtilities.m",
-        "objectivec/GPBWellKnownTypes.m",
-        "objectivec/GPBWireFormat.m",
-    ],
     visibility = ["//visibility:public"],
 )
 

objectivec/BUILD

@@ -0,0 +1,90 @@
+load("@rules_cc//cc:defs.bzl", "objc_library")
+
+objc_library(
+    name = "objectivec",
+    hdrs = [
+        "GPBAny.pbobjc.h",
+        "GPBApi.pbobjc.h",
+        "GPBDuration.pbobjc.h",
+        "GPBEmpty.pbobjc.h",
+        "GPBFieldMask.pbobjc.h",
+        "GPBSourceContext.pbobjc.h",
+        "GPBStruct.pbobjc.h",
+        "GPBTimestamp.pbobjc.h",
+        "GPBType.pbobjc.h",
+        "GPBWrappers.pbobjc.h",
+        "GPBArray.h",
+        "GPBBootstrap.h",
+        "GPBCodedInputStream.h",
+        "GPBCodedOutputStream.h",
+        "GPBDescriptor.h",
+        "GPBDictionary.h",
+        "GPBExtensionInternals.h",
+        "GPBExtensionRegistry.h",
+        "GPBMessage.h",
+        "GPBProtocolBuffers.h",
+        "GPBProtocolBuffers_RuntimeSupport.h",
+        "GPBRootObject.h",
+        "GPBRuntimeTypes.h",
+        "GPBUnknownField.h",
+        "GPBUnknownFieldSet.h",
+        "GPBUtilities.h",
+        "GPBWellKnownTypes.h",
+        "GPBWireFormat.h",
+        "google/protobuf/Any.pbobjc.h",
+        "google/protobuf/Api.pbobjc.h",
+        "google/protobuf/Duration.pbobjc.h",
+        "google/protobuf/Empty.pbobjc.h",
+        "google/protobuf/FieldMask.pbobjc.h",
+        "google/protobuf/SourceContext.pbobjc.h",
+        "google/protobuf/Struct.pbobjc.h",
+        "google/protobuf/Timestamp.pbobjc.h",
+        "google/protobuf/Type.pbobjc.h",
+        "google/protobuf/Wrappers.pbobjc.h",
+        # Package private headers, but exposed because the generated sources
+        # need to use them.
+        "GPBArray_PackagePrivate.h",
+        "GPBCodedInputStream_PackagePrivate.h",
+        "GPBCodedOutputStream_PackagePrivate.h",
+        "GPBDescriptor_PackagePrivate.h",
+        "GPBDictionary_PackagePrivate.h",
+        "GPBMessage_PackagePrivate.h",
+        "GPBRootObject_PackagePrivate.h",
+        "GPBUnknownFieldSet_PackagePrivate.h",
+        "GPBUnknownField_PackagePrivate.h",
+        "GPBUtilities_PackagePrivate.h",
+    ],
+    copts = [
+        "-Wno-vla",
+    ],
+    includes = [
+        ".",
+    ],
+    non_arc_srcs = [
+        "GPBAny.pbobjc.m",
+        "GPBApi.pbobjc.m",
+        "GPBDuration.pbobjc.m",
+        "GPBEmpty.pbobjc.m",
+        "GPBFieldMask.pbobjc.m",
+        "GPBSourceContext.pbobjc.m",
+        "GPBStruct.pbobjc.m",
+        "GPBTimestamp.pbobjc.m",
+        "GPBType.pbobjc.m",
+        "GPBWrappers.pbobjc.m",
+        "GPBArray.m",
+        "GPBCodedInputStream.m",
+        "GPBCodedOutputStream.m",
+        "GPBDescriptor.m",
+        "GPBDictionary.m",
+        "GPBExtensionInternals.m",
+        "GPBExtensionRegistry.m",
+        "GPBMessage.m",
+        "GPBRootObject.m",
+        "GPBUnknownField.m",
+        "GPBUnknownFieldSet.m",
+        "GPBUtilities.m",
+        "GPBWellKnownTypes.m",
+        "GPBWireFormat.m",
+    ],
+    visibility = ["//visibility:public"],
+)