Add grpc-gateway for HTTP JSON API

grpc/scripts/gen.sh

@@ -43,6 +43,19 @@ do
         echo "Generating Go code"
         $exec --go_out=plugins=grpc:$out $pb_files $async_tag
     fi
+    if [ $aug == "gohttp" ]; then
+        plugin=protoc-gen-grpc-gateway
+        which $plugin > /dev/null
+        if [ $? -ne 0 ];then
+            echo "missing plugin: $plugin" && exit
+        fi
+        out="$gen_dir/go"
+        if [ ! -d $out ]; then
+            mkdir -p $out
+        fi
+        echo "Generating Go HTTP code"
+        $exec --grpc-gateway_out=grpc_api_configuration=bdware/bdledger/api/grpc-gateway.yml,logtostderr=true:$out $pb_files $async_tag
+    fi
     if [ $aug == "nodejs" ]; then
         plugin=grpc_tools_node_protoc_plugin
         plugin_path=$(which $plugin)