fix(makefile): add "make proto" for proto generating (#2130)

Co-authored-by: Guoqiang Ding <guoqiang10@staff.sina.com.cn>

Makefile

@@ -76,4 +76,9 @@ test-coverage:
 .PHONY: lint
 lint: $(LINTER)
 	@${TOOLS_SHELL} lint
-	@echo "lint check finished"
+	@echo "lint check finished"
+
+.PHONY: proto
+proto:
+	protoc --proto_path=./api --proto_path=./third_party --go_out=paths=source_relative:./api --go-grpc_out=paths=source_relative:./api --go-http_out=paths=source_relative:./api metadata/metadata.proto
+	protoc --proto_path=./third_party --go_out=paths=source_relative:./ errors/errors.proto

api/metadata/server.go

@@ -20,9 +20,6 @@ import (
 	dpb "google.golang.org/protobuf/types/descriptorpb"
 )
 
-//nolint:lll
-//go:generate protoc --proto_path=. --proto_path=../../third_party --go_out=paths=source_relative:. --go-grpc_out=paths=source_relative:. --go-http_out=paths=source_relative:. metadata.proto
-
 // Server is api meta server
 type Server struct {
 	UnimplementedMetadataServer

errors/errors.go

@@ -9,8 +9,6 @@ import (
 	"google.golang.org/grpc/status"
 )
 
-//go:generate protoc -I. --go_out=paths=source_relative:. errors.proto
-
 const (
 	// UnknownCode is unknown code for error info.
 	UnknownCode = 500