C# plugin not generating *GRPC.cs file

[Alquin Cook]

I  am trying to generate grpc .cs files using a .bat file, but the messageGRPC.cs file does not get generated. However, the message.g.cs DOES get created. There are no errors and I even tried hard coding the paths and running the command window in administrator mode with the same results.

Again the message.g.cs does get generated correctly, but the messageGRPC.cs does not. I have set 

--grpc_out="%PROJ_ROOT%"\gRPC and --plugin=protoc-gen-grpc="%PLUGIN_DIR%"\grpc_csharp_plugin.exe

In my Visual Studio 2015 project I have installed Google.Protobuf, Google.Protobuf.Tools, Grpc, Grpc.Core, and Grpc.Tools from NuGet.

Is there anything I'm doing wrong?

@echo off
cd %~dp0

:: Display Current Working Directory used for debugging
:: echo Current Directory = %CD%

set PROJ_ROOT=%CD%        
set ROOT_DIR=%CD%

:: Display Solution Root Directory used for debugging
:: echo Root Directory = %ROOT_DIR%

:: Set path variables
set SRC_DIR=%ROOT_DIR%\Common\Messages

set PLUGIN_DIR=%ROOT_DIR%\<project>\packages\Grpc.Tools.1.3.0\tools\windows_x64

set DST_DIR=%ROOT_DIR%\Common\Messages\proto3

:: debugging
echo plug_in_dir = "%PLUGIN_DIR%"

echo Started compiling .proto messages using protoc version
"%PLUGIN_DIR%"\protoc.exe --version

:: code is on one line. it's wrapped here for readability
"%PLUGIN_DIR%"\protoc.exe -I "%SRC_DIR%" --proto_path="%SRC_DIR%" 
 --csharp_opt=file_extension=.g.cs --csharp_out="%DST_DIR%" "%SRC_DIR%"\message.proto 
 --grpc_out="%PROJ_ROOT%"\gRPC 
 --plugin=protoc-gen-grpc="%PLUGIN_DIR%"\grpc_csharp_plugin.exe  

cd %PROJ_ROOT%

echo Completed compiling .proto messages

[Jan Tattermusch]

Does your .proto file contain any service definitions (as opposed to just protobuf messages)? If not, no *Grpc.cs file should be generated (as there are no services that gRPC could use).

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[Alquin Cook]

Thanks Jan. Yes, that was my problem. The tutorial I was following didn't have the service definition in the .proto file

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