First, install the Cap'n Proto tools.

Then, run the following command to install the compiler plugin for the Go language:

go install capnproto.org/go/capnp/v3/capnpc-go@latest

This will install a capnpc-go executable under $(go env GOPATH)/bin, which you should make sure has been added to your shell's $PATH variable.

You will also need a checkout of of the go-capnp repository, for the included schema:

git clone https://github.com/capnproto/go-capnp

If you get stuck at any point, please ask us for help!

Next

Once you have installed capnp and the Go plugin, you should write and compile your first schema.