feat: Add upb_c_proto_library rules for some well known protobuf types

These are not for general consumption. They are specifically for projects which have an agreement with protobuf on directly accessing upb. Any other usage is unsupported and may be broken at anytime without warning.

PiperOrigin-RevId: 724391383

google/rpc/BUILD.bazel

@@ -1,3 +1,15 @@
+##############################################################################
+# Java
+##############################################################################
+load(
+    "@com_google_googleapis_imports//:imports.bzl",
+    "cc_proto_library",
+    "go_proto_library",
+    "java_gapic_assembly_gradle_pkg",
+    "java_proto_library",
+    "py_proto_library",
+    "upb_c_proto_library",
+)
 load("@rules_proto//proto:defs.bzl", "proto_library")
 
 # This is an API workspace, having public visibility by default makes perfect sense.
@@ -28,13 +40,6 @@ proto_library(
     ],
 )
 
-##############################################################################
-# Java
-##############################################################################
-load("@com_google_googleapis_imports//:imports.bzl",
-     "java_gapic_assembly_gradle_pkg",
-     "java_proto_library")
-
 java_proto_library(
     name = "rpc_java_proto",
     deps = [
@@ -50,19 +55,13 @@ java_proto_library(
 java_gapic_assembly_gradle_pkg(
     name = "google-rpc-java",
     deps = [
-        ":rpc_java_proto",
-        ":code_proto",
         "error_details_proto",
-        "status_proto"
+        "status_proto",
+        ":code_proto",
+        ":rpc_java_proto",
     ],
 )
 
-
-##############################################################################
-# Go
-##############################################################################
-load("@com_google_googleapis_imports//:imports.bzl", "go_proto_library")
-
 go_proto_library(
     name = "code_go_proto",
     importpath = "google.golang.org/genproto/googleapis/rpc/code",
@@ -81,14 +80,6 @@ go_proto_library(
     protos = [":status_proto"],
 )
 
-##############################################################################
-# C++
-##############################################################################
-load(
-    "@com_google_googleapis_imports//:imports.bzl",
-    "cc_proto_library",
-)
-
 cc_proto_library(
     name = "code_cc_proto",
     deps = [":code_proto"],
@@ -104,10 +95,15 @@ cc_proto_library(
     deps = [":status_proto"],
 )
 
-##############################################################################
-# Python
-##############################################################################
-load("@com_google_googleapis_imports//:imports.bzl", "py_proto_library")
+upb_c_proto_library(
+    name = "code_upb_proto",
+    deps = [":code_proto"],
+)
+
+upb_c_proto_library(
+    name = "status_upb_proto",
+    deps = [":status_proto"],
+)
 
 py_proto_library(
     name = "code_py_proto",

repository_rules.bzl

@@ -66,6 +66,7 @@ def switched_rules_by_language(
         ruby = False,
         csharp = False,
         go_test = False,
+        upb = False,
         rules_override = {}):
     """Switches rules in the generated imports.bzl between no-op and the actual implementation.
 
@@ -220,6 +221,15 @@ def switched_rules_by_language(
     )
     rules["cc_gapic_library"] = _switch(False)
 
+    #
+    # upb
+    #
+    rules["upb_c_proto_library"] = _switch(
+        upb,
+        "@com_google_protobuf//bazel:upb_c_proto_library.bzl",
+        "upb_c_proto_library",
+    )
+
     #
     # PHP
     #