From 0045e27bf93e4376363a86a6ce8bc7d13565b1da Mon Sep 17 00:00:00 2001
From: Thomas Van Lenten <thomasvl@google.com>
Date: Tue, 4 Jan 2022 12:53:31 -0500
Subject: [PATCH] Allow optional building in of objc prefix validation.
 (#28388)

---
 src/compiler/objective_c_plugin.cc | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/compiler/objective_c_plugin.cc b/src/compiler/objective_c_plugin.cc
index 8cc3fdfe172..65807dc98d8 100644
--- a/src/compiler/objective_c_plugin.cc
+++ b/src/compiler/objective_c_plugin.cc
@@ -29,6 +29,9 @@
 using ::google::protobuf::compiler::objectivec::
     IsProtobufLibraryBundledProtoFile;
 using ::google::protobuf::compiler::objectivec::ProtobufLibraryFrameworkName;
+#ifdef SUPPORT_OBJC_PREFIX_VALIDATION
+using ::google::protobuf::compiler::objectivec::ValidateObjCClassPrefixes;
+#endif
 using ::grpc_objective_c_generator::FrameworkImport;
 using ::grpc_objective_c_generator::LocalImport;
 using ::grpc_objective_c_generator::PreprocIfElse;
@@ -90,6 +93,13 @@ class ObjectiveCGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
       return true;
     }
 
+#ifdef SUPPORT_OBJC_PREFIX_VALIDATION
+    // Default options will use env variables for controls.
+    if (!ValidateObjCClassPrefixes({file}, {}, error)) {
+      return false;
+    }
+#endif
+
     bool grpc_local_import = false;
     ::std::string framework;
     ::std::string pb_runtime_import_prefix;