compiler: add option @generated=omit (#11086)

related to #11081

Author: panchenko

Diff for: compiler/build.gradle

@@ -192,7 +192,10 @@ protobuf {
                 java { option 'lite' }
             }
             plugins {
-                grpc { option 'lite' }
+                grpc {
+                    option 'lite'
+                    option '@generated=omit'
+                }
             }
         }
     }

Diff for: compiler/src/java_plugin/cpp/java_generator.cpp

@@ -1116,7 +1116,8 @@ static void PrintService(const ServiceDescriptor* service,
                          std::map<std::string, std::string>* vars,
                          Printer* p,
                          ProtoFlavor flavor,
-                         bool disable_version) {
+                         bool disable_version,
+                         GeneratedAnnotation generated_annotation) {
   (*vars)["service_name"] = service->name();
   (*vars)["file_name"] = service->file()->name();
   (*vars)["service_class_name"] = ServiceClassName(service);
@@ -1129,24 +1130,17 @@ static void PrintService(const ServiceDescriptor* service,
   // TODO(nmittler): Replace with WriteServiceDocComment once included by protobuf distro.
   GrpcWriteServiceDocComment(p, service, NONE);
 
-  if ((*vars)["JakartaMode"] == "javax") {
+  if (generated_annotation == GeneratedAnnotation::JAVAX) {
     p->Print(
         *vars,
         "@javax.annotation.Generated(\n"
         "    value = \"by gRPC proto compiler$grpc_version$\",\n"
         "    comments = \"Source: $file_name$\")\n"
         "@$GrpcGenerated$\n");
-  } else if ((*vars)["JakartaMode"] == "omit") {
+  } else { // GeneratedAnnotation::OMIT
     p->Print(
         *vars,
         "@$GrpcGenerated$\n");
-  } else {
-    p->Print(
-        *vars,
-        "@javax.annotation.Generated(\n"
-        "    value = \"by gRPC proto compiler$grpc_version$\",\n"
-        "    comments = \"Source: $file_name$\")\n"
-        "@$GrpcGenerated$\n");
   }
 
   if (service->options().deprecated()) {
@@ -1232,7 +1226,7 @@ void GenerateService(const ServiceDescriptor* service,
                      protobuf::io::ZeroCopyOutputStream* out,
                      ProtoFlavor flavor,
                      bool disable_version,
-                     std::string jakarta_mode) {
+                     GeneratedAnnotation generated_annotation) {
   // All non-generated classes must be referred by fully qualified names to
   // avoid collision with generated classes.
   std::map<std::string, std::string> vars;
@@ -1264,7 +1258,6 @@ void GenerateService(const ServiceDescriptor* service,
   vars["MethodDescriptor"] = "io.grpc.MethodDescriptor";
   vars["StreamObserver"] = "io.grpc.stub.StreamObserver";
   vars["Iterator"] = "java.util.Iterator";
-  vars["JakartaMode"] = jakarta_mode;
   vars["GrpcGenerated"] = "io.grpc.stub.annotations.GrpcGenerated";
   vars["ListenableFuture"] =
       "com.google.common.util.concurrent.ListenableFuture";
@@ -1283,7 +1276,7 @@ void GenerateService(const ServiceDescriptor* service,
   if (!vars["Package"].empty()) {
     vars["Package"].append(".");
   }
-  PrintService(service, &vars, &printer, flavor, disable_version);
+  PrintService(service, &vars, &printer, flavor, disable_version, generated_annotation);
 }
 
 std::string ServiceJavaPackage(const FileDescriptor* file) {

Diff for: compiler/src/java_plugin/cpp/java_generator.h

@@ -57,6 +57,10 @@ enum ProtoFlavor {
   NORMAL, LITE
 };
 
+enum GeneratedAnnotation {
+  OMIT, JAVAX
+};
+
 // Returns the package name of the gRPC services defined in the given file.
 std::string ServiceJavaPackage(const impl::protobuf::FileDescriptor* file);
 
@@ -69,7 +73,7 @@ void GenerateService(const impl::protobuf::ServiceDescriptor* service,
                      impl::protobuf::io::ZeroCopyOutputStream* out,
                      ProtoFlavor flavor,
                      bool disable_version,
-                     std::string jakarta_mode);
+                     GeneratedAnnotation generated_annotation);
 
 }  // namespace java_grpc_generator
 

Diff for: compiler/src/java_plugin/cpp/java_plugin.cpp

@@ -58,24 +58,21 @@ class JavaGrpcGenerator : public protobuf::compiler::CodeGenerator {
 
     java_grpc_generator::ProtoFlavor flavor =
         java_grpc_generator::ProtoFlavor::NORMAL;
+    java_grpc_generator::GeneratedAnnotation generated_annotation =
+        java_grpc_generator::GeneratedAnnotation::JAVAX;
 
-    /*
-        jakarta_mode has these values:
-        javax, the original behavior - add @javax.annotation.Generated
-        omit, "less controversial" = just add @io.grpc.stub.annotations.GrpcGenerated
-        and maybe others in the future
-    */
-    std::string jakarta_mode;
     bool disable_version = false;
     for (size_t i = 0; i < options.size(); i++) {
       if (options[i].first == "lite") {
         flavor = java_grpc_generator::ProtoFlavor::LITE;
       } else if (options[i].first == "noversion") {
         disable_version = true;
-      } else if (options[i].first == "jakarta_javax") {
-        jakarta_mode = "javax";
-      } else if (options[i].first == "jakarta_omit") {
-        jakarta_mode = "omit";
+      } else if (options[i].first == "@generated") {
+         if (options[i].second == "omit") {
+           generated_annotation = java_grpc_generator::GeneratedAnnotation::OMIT;
+         } else if (options[i].second == "javax") {
+           generated_annotation = java_grpc_generator::GeneratedAnnotation::JAVAX;
+         }
       }
     }
 
@@ -88,7 +85,7 @@ class JavaGrpcGenerator : public protobuf::compiler::CodeGenerator {
       std::unique_ptr<protobuf::io::ZeroCopyOutputStream> output(
           context->Open(filename));
       java_grpc_generator::GenerateService(
-          service, output.get(), flavor, disable_version, jakarta_mode);
+          service, output.get(), flavor, disable_version, generated_annotation);
     }
     return true;
   }

Diff for: compiler/src/testLite/golden/TestDeprecatedService.java.txt

@@ -7,9 +7,6 @@ import static io.grpc.MethodDescriptor.generateFullMethodName;
  * Test service that has been deprecated and should generate with Java's @Deprecated annotation
  * </pre>
  */
-@javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.64.0-SNAPSHOT)",
-    comments = "Source: grpc/testing/compiler/test.proto")
 @io.grpc.stub.annotations.GrpcGenerated
 @java.lang.Deprecated
 public final class TestDeprecatedServiceGrpc {

Diff for: compiler/src/testLite/golden/TestService.java.txt

@@ -7,9 +7,6 @@ import static io.grpc.MethodDescriptor.generateFullMethodName;
  * Test service that supports all call types.
  * </pre>
  */
-@javax.annotation.Generated(
-    value = "by gRPC proto compiler (version 1.64.0-SNAPSHOT)",
-    comments = "Source: grpc/testing/compiler/test.proto")
 @io.grpc.stub.annotations.GrpcGenerated
 public final class TestServiceGrpc {