feat: add example of non-working global grpc_api_configuration file

Makefile

@@ -131,6 +131,9 @@ proto:
 		--template ./examples/internal/proto/examplepb/visibility_rule_preview_and_internal_echo_service.buf.gen.yaml \
 		--path examples/internal/proto/examplepb/visibility_rule_echo_service.proto
 	mv examples/internal/proto/examplepb/visibility_rule_echo_service.swagger.json examples/internal/proto/examplepb/visibility_rule_preview_and_internal_echo_service.swagger.json
+	buf generate \
+		--template ./examples/internal/proto/globalconfig/globalconfig.buf.gen.yaml \
+		--path examples/internal/proto/globalconfig
 
 generate: proto $(ECHO_EXAMPLE_SRCS) $(ABE_EXAMPLE_SRCS) $(UNANNOTATED_ECHO_EXAMPLE_SRCS) $(RESPONSE_BODY_EXAMPLE_SRCS) $(GENERATE_UNBOUND_METHODS_EXAMPLE_SRCS)
 

examples/internal/proto/globalconfig/first_svc/v1/first_svc.proto

@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package grpc.gateway.examples.internal.proto.globalconfig.first_svc.v1;
+
+option go_package = "github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/proto/globalconfig/first_svc/v1;first_svcv1";
+
+service FirstService {
+  rpc Get(GetRequest) returns (GetResponse) {}
+}
+
+message GetRequest {
+  string request = 1;
+}
+
+message GetResponse {
+  string response = 1;
+}

examples/internal/proto/globalconfig/globalconfig.buf.gen.yaml

@@ -0,0 +1,11 @@
+version: v1
+plugins:
+  - name: grpc-gateway
+    out: .
+    opt:
+      - paths=source_relative
+      - grpc_api_configuration=examples/internal/proto/globalconfig/grpc_annotations.yaml
+  - name: openapiv2
+    out: .
+    opt:
+      - grpc_api_configuration=examples/internal/proto/globalconfig/grpc_annotations.yaml

examples/internal/proto/globalconfig/grpc_annotations.yaml

@@ -0,0 +1,12 @@
+type: google.api.Service
+config_version: 3
+
+http:
+  rules:
+      ### First service ###
+    - selector: api.first_svc.v1.FirstService.Get
+      get: /api/v1/first/get
+
+      ### Second service ###
+    - selector: api.second_svc.v1.SecondService.Get
+      get: /api/v2/second/get

examples/internal/proto/globalconfig/second_svc/v1/second_svc.proto

@@ -0,0 +1,17 @@
+syntax = "proto3";
+
+package grpc.gateway.examples.internal.proto.globalconfig.second_svc.v1;
+
+option go_package = "github.com/grpc-ecosystem/grpc-gateway/v2/examples/internal/proto/globalconfig/second_svc/v1;second_svcv1";
+
+service SecondService {
+  rpc Get(GetRequest) returns (GetResponse) {}
+}
+
+message GetRequest {
+  string request = 1;
+}
+
+message GetResponse {
+  string response = 1;
+}