How to implement a simple command-line interface (CLI) using bufio in Go?

To implement a simple command-line interface (CLI) using bufio in Go, you can follow these steps:

Import the necessary packages:

import (
	"bufio"
	"fmt"
	"os"
	"strings"
)

Create a function to handle user input and processing commands:

func handleCommand(command string) {
	// Process the command here
	// Example:
	if command == "hello" {
		fmt.Println("Hello!")
	} else if command == "exit" {
		os.Exit(0)
	} else {
		fmt.Println("Invalid command")
	}
}

Create a loop to continuously read user input and call the command handler function:

func main() {
	reader := bufio.NewReader(os.Stdin)
	for {
		fmt.Print("> ")
		input, _ := reader.ReadString('\n')
		input = strings.TrimSpace(input)
		handleCommand(input)
	}
}

Run the program and test the CLI:

go run main.go

Now, you can type commands in the terminal and see the output based on the command.

Example Usage:

> hello
Hello!
> invalid
Invalid command
> exit

Note: This is a basic implementation that reads input until the user enters "exit". You can extend it to perform more complex operations based on different commands.