[os/exec] 커맨드 명령어 실행하기 in go

package main

import (
	"fmt"
	"os"
	"os/exec"
	"strings"
)

func main() {

	// 1. Create an *exec.Cmd
	// cmd := exec.Command("go", "version")

	// // Stdout buffer
	// cmdOutput := &bytes.Buffer{}
	// // Attach buffer to command
	// cmd.Stdout = cmdOutput

	// // Execute command
	// printCommand(cmd)
	// err := cmd.Run() // will wait for command to return
	// printError(err)
	// // Only output the commands stdout
	// printOutput(cmdOutput.Bytes())

	// 2. Create an *exec.Cmd
	cmd := exec.Command("go", "version")

	// Combine stdout and stderr
	printCommand(cmd)
	output, err := cmd.CombinedOutput()
	printError(err)
	printOutput(output)
}

func printCommand(cmd *exec.Cmd) {
	fmt.Printf("==> Executing: %s\n", strings.Join(cmd.Args, " "))
}

func printError(err error) {
	if err != nil {
		os.Stderr.WriteString(fmt.Sprintf("==> Error: %s\n", err.Error()))
	}
}

func printOutput(outs []byte) {
	if len(outs) > 0 {
		fmt.Printf("==> Output: %s\n", string(outs))
	}
}

출처: https://www.darrencoxall.com/golang/executing-commands-in-go