Introduce proto filter for inject_field_listener_events.

By default all protos are included in proto instrumentation when inject_field_listener_events option is set. Adding proto instrumentation callbacks for every proto in the binary adds codesize and runtime performance penalties. This cl introduces 'protos_for_field_listener_events' option where a list of proto files can be provided (seperated by ':') for which field listener events will be injected.

For example :-

protos_for_field_listener_events=foo/bar/foo.proto:foo/bar.proto

The field listener event will only be sent for 'foo/bar/foo.proto' and 'foo/bar.proto'.

PiperOrigin-RevId: 512905094

Author: protobuf-github-bot

src/google/protobuf/compiler/cpp/BUILD.bazel

@@ -85,6 +85,7 @@ cc_library(
         ":names",
         ":names_internal",
         "//src/google/protobuf/compiler:code_generator",
+        "//src/google/protobuf/compiler:command_line_interface",
         "//src/google/protobuf/compiler:retention",
         "@com_google_absl//absl/base:core_headers",
         "@com_google_absl//absl/container:btree",

src/google/protobuf/compiler/cpp/generator.cc

@@ -43,6 +43,7 @@
 #include "absl/strings/match.h"
 #include "absl/strings/str_cat.h"
 #include "absl/strings/string_view.h"
+#include "google/protobuf/compiler/command_line_interface.h"
 #include "google/protobuf/compiler/cpp/file.h"
 #include "google/protobuf/compiler/cpp/helpers.h"
 #include "google/protobuf/descriptor.pb.h"
@@ -161,6 +162,15 @@ bool CppGenerator::Generate(const FileDescriptor* file,
     } else if (key == "proto_static_reflection_h") {
     } else if (key == "annotate_accessor") {
       file_options.annotate_accessor = true;
+    } else if (key == "protos_for_field_listener_events") {
+      for (absl::string_view proto :
+           absl::StrSplit(value, CommandLineInterface::kPathSeparator)) {
+        if (proto == file->name()) {
+          file_options.field_listener_options.inject_field_listener_events =
+              true;
+          break;
+        }
+      }
     } else if (key == "inject_field_listener_events") {
       file_options.field_listener_options.inject_field_listener_events = true;
     } else if (key == "forbidden_field_listener_events") {