package server

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

func execCmd(name string, args ...string) (string, error) {
	cmd := exec.Command(name, args...)
	var out bytes.Buffer
	cmd.Stdout = &out

	err := cmd.Run()
	if err != nil {
		return "", err
	}

	return out.String(), nil
}

func execRuncVersion(name string, args ...string) (string, error) {
	out, err := execCmd(name, args...)
	if err != nil {
		return "", err
	}

	firstLine := out[:strings.Index(out, "\n")]
	v := firstLine[strings.LastIndex(firstLine, " ")+1:]
	return v, nil
}