golang: How to go get private repos

Recently, I've been working on some golang projects at DataSift that depend on some private modules. This means that when I run go get to fetch the module, GitHub asks me for my username and password. Unfortunately, as I use 2FA I need to generate a new, temporary password for applications that want my password. As go get doesn't cache credentials, I'd have to do this every time I needed a private repo. Instead, I wanted to force go get to use my SSH key.

Fortunately, as go get uses git, you can change your .gitconfig to force it to use SSH.

bash
$ git config --global url."[email protected]:".insteadOf "https://github.com/"
$ cat ~/.gitconfig
[url "[email protected]:"]
    insteadOf = https://github.com/

Here, we say use [email protected] any time you'd use https://github.com. This works for everything, not just go get. It just has the nice side effect of using your SSH key any time you run go get too.