安装go的依赖管理器dev ， hack on dep 是什么意思？
If you want to 【hack on dep】, you can install via go get:
go get -u github.com/golang/dep/cmd/dep
Note that dep requires a functioning Go workspace and GOPATH. If you're unfamiliar with Go workspaces and GOPATH, have a look at the language documentation and get your local workspace set up. Dep's model could lead to being able to work without GOPATH, but we're not there yet.