Switching to Go Modules - bye GOPATH and Godep
Go modules! Finally you don’t have to place your code into the directory
structure imposed by GOPATH! Also, you don’t need to set up external
tooling, such as Godep, to manage your project’s dependencies.
All you need is to use Go in the version 1.11+ and you’re set.
Well, not quite.
Before you can start enjoying modules, you need to make the switch to them, or init your fresh new project to use them. Here’s how:
Apply it to an old project
You have an existing project, and want to start using go modules? Run the following command, and you’re almost done:
go mod init github.com/name/repo
The last argument, is the importable path to the directory you’re working from.
If you are already using godep, you won’t need to do anything.
The versions you specified prior, are copied over from your Godep files.
All that’s left to do, is to delete the old Godeps.* files once the command is done.
When you’re starting from scratch
If you haven’t been using Godep on an old project, or are starting a new Go project and would like to use modules, all you need is a single command.
After the mod init command like above, you can use go get to add dependencies to
the project, and have the module remember their exact version.