Developing the which(1) Utility in Go

Let’s now discuss a practical example for developing a Go version of the which(1) utility, which locates a program file in the user's PATH value.

Go can work with our operating system through a set of packages. A good way to learn a new programming language is by trying to implement simple versions of traditional UNIX utilities. In this lesson, we’ll see a Go version of the which(1) utility, which will help us understand the way Go interacts with the underlying OS and reads environment variables.

Go code for which(1)

The presented code, which will implement the functionality of which(1), can be divided into three ...