Go – How to import a specific version of a package using go get

gopackagepackage-managers

coming from a Node environment I used to install a specific version of a vendor lib into the project folder (node_modules) by telling npm to install that version of that lib from the package.json or even directly from the console, like so:

$ npm install express@4.0.0

Then I used to import that version of that package in my project just with:

var express = require('express');

Now, I want to do the same thing with go. How can I do that?
Is it possible to install a specific version of a package? If so, using a centralized $GOPATH, how can I import one version instead of another?

I would do something like this:

$ go get github.com/wilk/uuid@0.0.1
$ go get github.com/wilk/uuid@0.0.2

But then, how can I make a difference during the import?

Best Answer

Go 1.11 will have a feature called go modules and you can simply add a dependency with a version. Follow these steps:

go mod init .
go mod edit -require github.com/wilk/uuid@0.0.1
go get -v -t ./...   
go build
go install

Here's more info on that topic - https://github.com/golang/go/wiki/Modules

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