rpc generation fix (#184)

* reactor alert

* optimize

* add test case

* update the target directory in case proto contains option

* fix missing comments and format code

tools/goctl/rpc/parser/comment.go

@@ -6,5 +6,5 @@ func GetComment(comment *proto.Comment) string {
 	if comment == nil {
 		return ""
 	}
-	return comment.Message()
+	return "// " + comment.Message()
 }

tools/goctl/rpc/parser/test_invalid_request.proto

@@ -8,6 +8,6 @@ import "base.proto";
 message Reply{}
 
 
-service TestService{
-  rpc TestRpcTwo (base.Req)returns(Reply);
+service TestService {
+  rpc TestRpcTwo (base.Req) returns (Reply);
 }

tools/goctl/rpc/parser/test_invalid_response.proto

@@ -8,6 +8,6 @@ import "base.proto";
 message Req{}
 
 
-service TestService{
-  rpc TestRpcTwo (Req)returns(base.Reply);
+service TestService {
+  rpc TestRpcTwo (Req) returns (base.Reply);
 }

tools/goctl/rpc/parser/test_option.proto

@@ -2,9 +2,10 @@ syntax = "proto3";
 
 package stream;
 
-option go_package="github.com/tal-tech/go-zero";
+option go_package = "github.com/tal-tech/go-zero";
 
-message placeholder{}
-service greet{
-  rpc hello(placeholder)returns(placeholder);
+message placeholder {}
+
+service greet {
+  rpc hello (placeholder) returns (placeholder);
 }

tools/goctl/rpc/parser/test_option2.proto

@@ -3,7 +3,8 @@ syntax = "proto3";
 package stream;
 
 
-message placeholder{}
-service greet{
-  rpc hello(placeholder)returns(placeholder);
+message placeholder {}
+
+service greet {
+  rpc hello (placeholder) returns (placeholder);
 }