Installing gorilla/mux

Follow these steps to install the mux package:

1. You need to run this command in the Terminal (Mac OS X and Linux):

go get -u github.com/gorilla/mux

2. If you get any errors saying package github.com/gorilla/mux: cannot download, $GOPATH not set. For more details see--go help gopath, set the $GOPATH environment variable using the following command:

export GOPATH=~/go

3. As we discussed in Chapter 1, Getting Started with REST API Development, all the packages and programs go into GOPATH. It has three folders: bin, pkg, and src. Now, add GOPATH to the PATH variable to use the installed bin files as system utilities that have no ./executable style. Refer to the following command:

PATH="$GOPATH/bin:$PATH"

4. These settings stay until you turn off your machine. So, to make it a permanent change, add the preceding line to your bash/zsh profile file:

vi ~/.profile
(or)
vi ~/.zshrc 

We can import gorilla/mux in our programs, like this:

import "github.com/gorilla/mux"

Now, we are ready to go. Assuming gorilla/mux is installed, we can now explore its basics.