klientctl uses a combination of the Go 1.5 Vendoring Experiment and the GoVendor tool. You will likely want both of these. Please refer to the respective documentation(s) as needed, but for convenience we've compiled some quick-start instructions:

After installing Go 1.5, the GO15VENDOREXPERIMENT environment variable needs to be set to the value of 1. This environment variable tells Go to import packages from the vendor directory first. This can be done in your Shell RC (.bashrc, .config/fish/config.fish, etc). Example:

Bash:

export GO15VENDOREXPERIMENT=1

Fish:

set -Ux GO15VENDOREXPERIMENT 1

Go 1.5 handles the importing of vendored packages, but we use the tool GoVendor to handle adding packages to that directory, and pinning them to the specified versions. This can be installed simply with:

go get github.com/kardianos/govendor

To add a new package to the vendor directly, first make sure the package is in your $GOPATH, then simply run:

govendor add github.com/some/dependency

If you need to update the vendored version of a library, follow the following steps:

1. go get -u github.com/some/dependency
2. govendor update github.com/some/dependency

If you need to choose a specific commit manually, checkout that commit beforehand. Example:

1. cd $GOPATH/github.com/some/dependency
2. git checkout <commit>
3. cd $GOPATH/github.com/your/repo
4. govendor update github.com/some/dependency