protoc-gen-openapiv2: generate hybrid files (#5088)

Fixes #5046

Author: johanbrandhorst

Makefile

@@ -98,6 +98,9 @@ proto:
 	rm ./examples/internal/proto/examplepb/generated_input.pb.go
 	rm ./examples/internal/proto/examplepb/generated_input_grpc.pb.go
 	rm ./examples/internal/proto/examplepb/generated_input.pb.gw.go
+	# Remove swagger files for openapiv2 definitions, they're unused
+	rm ./protoc-gen-openapiv2/options/annotations.swagger.json
+	rm ./protoc-gen-openapiv2/options/openapiv2.swagger.json
 	buf generate \
 		--template ./examples/internal/proto/examplepb/openapi_merge.buf.gen.yaml \
 		--path ./examples/internal/proto/examplepb/openapi_merge_a.proto \
@@ -144,6 +147,10 @@ proto:
 	buf generate \
 		--template examples/internal/proto/examplepb/enum_with_single_value.buf.gen.yaml \
 		--path examples/internal/proto/examplepb/enum_with_single_value.proto
+	buf generate \
+		--template ./protoc-gen-openapiv2/options/buf.gen.yaml \
+		--path ./protoc-gen-openapiv2/options/annotations.proto \
+		--path ./protoc-gen-openapiv2/options/openapiv2.proto
 
 generate: proto $(ECHO_EXAMPLE_SRCS) $(ABE_EXAMPLE_SRCS) $(UNANNOTATED_ECHO_EXAMPLE_SRCS) $(RESPONSE_BODY_EXAMPLE_SRCS) $(GENERATE_UNBOUND_METHODS_EXAMPLE_SRCS)
 

protoc-gen-openapiv2/options/annotations.pb.go

@@ -0,0 +1,7 @@
+version: v2
+plugins:
+  - remote: buf.build/protocolbuffers/go:v1.36.0
+    out: .
+    opt:
+      - paths=source_relative
+      - default_api_level=API_HYBRID