# Development Guide

## Building the development environment

You need a working [Go environment](https://golang.org/doc/install) (1.11 or newer).

```bash
$ go get -u github.com/golang/dep/cmd/dep
$ go get github.com/osrg/gobgp
$ cd $GOPATH/src/github.com/osrg/gobgp && dep ensure
```

Now ready to build two binaries, `cmd/gobgp` and `cmd/gobgpd`.

## Changing the gRPC API

If you change the gRPC API, generate `api/gobgp.pb.go` in the following way:

```bash
$ protoc -I ~/protobuf/src -I ${GOBGP}/api --go_out=plugins=grpc:${GOBGP}/api \
         ${GOBGP}/api/gobgp.proto ${GOBGP}/api/attribute.proto ${GOBGP}/api/capability.proto
```