Why CLI tools in Go

Context

Go is an excellent language for building command‑line interface (CLI) tools. Its strengths include:

• Single binary deployment – No runtime dependencies. You build once, run anywhere.
• Cross‑platform compilation – GOOS=windows go build produces a Windows .exe from a Mac or Linux.
• Fast startup and low memory – Critical for tools that run and exit quickly.
• Rich standard library – flag, os, io, text/tabwriter, encoding/json and more.
• Static typing – Helps prevent bugs in complex CLI logic.

Many famous CLI tools are written in Go: Docker, Kubernetes, Terraform, Hugo, and countless developer tools.

Example

A minimal CLI tool that prints its name and arguments.

Code example

package main

import (
    "fmt"
    "os"
)

func main() {
    fmt.Printf("Program: %s\n", os.Args[0])
    fmt.Printf("Arguments: %v\n", os.Args[1:])
}

Output (if run as ./mycli hello world)

Program: ./mycli
Arguments: [hello world]

Useful links

• Go blog: Command-line tools in Go
• Awesome Go CLI tools