Upgrade to https://blog.golang.org/protobuf-apiv2

scripts/gen.bat

@@ -0,0 +1,37 @@
+@echo off
+setlocal EnableDelayedExpansion
+
+cd /d "%~dp0.."
+where /q protoc || echo Missing protoc && exit /b
+set gen=.\gen
+set pkg=bdware/bdledger/api
+set protos=%pkg%/common.proto %pkg%/error_details.proto %pkg%/node.proto %pkg%/ledger.proto %pkg%/query.proto %pkg%/contract.proto
+
+for %%A in (%*) do (
+  if "%%A"=="go" (
+    set plugin=protoc-gen-go
+    where /q !plugin! || echo Missing !plugin! && exit /b
+    set out=%gen%\go
+    if not exist !out! mkdir !out!
+    echo Generating Go code
+    start /b protoc --go_out=plugins=grpc:!out! %protos%
+  )
+  if "%%A"=="nodejs" (
+    set plugin=grpc_tools_node_protoc_plugin
+    where /q !plugin! || echo missing !plugin! && exit /b
+    for /f %%i in ('where !plugin!') do set pluginPath=%%i
+    set out=%gen%\nodejs
+    if not exist !out! mkdir !out!
+    echo Generating Node.js code
+    start /b protoc --js_out=import_style=commonjs,binary:!nout! --grpc_out=!nout! --plugin=protoc-gen-grpc=!pluginPath! %protos%
+  )
+  if "%%A"=="ts" (
+    set plugin=protoc-gen-ts
+    where /q !plugin! || echo missing !plugin! && exit /B
+    for /f %%i in ('where !plugin!') do set pluginPath=%%i
+    set out=%gen%\nodejs
+    if not exist !out! mkdir !out!
+    echo Generating TypeScript definitions
+    start /b protoc --ts_out=!out! --plugin=protoc-gen-ts=!pluginPath! %protos%
+  )
+)