package CommonUtil

import (
	"bufio"
	"bytes"
	"errors"
	"log"
	"os/exec"
)

/**
功能：带回显的执行DOS命令
作者：黄海
时间：2020-05-18
*/
func Exec(name string, dir string, args ...string) error {
	cmd := exec.Command(name, args...)
	stderr, _ := cmd.StderrPipe()
	stdout, _ := cmd.StdoutPipe()
	cmd.Dir = dir
	if err := cmd.Start(); err != nil {
		log.Println("exec the cmd ", name, " failed")
		return err
	}
	// 正常日志
	logScan := bufio.NewScanner(stdout)
	go func() {
		for logScan.Scan() {
			log.Println(logScan.Text())
		}
	}()
	// 错误日志
	errBuf := bytes.NewBufferString("")
	scan := bufio.NewScanner(stderr)
	for scan.Scan() {
		s := scan.Text()
		log.Println("", s)
		errBuf.WriteString(s)
		errBuf.WriteString("\n")
	}
	// 等待命令执行完
	cmd.Wait()
	if !cmd.ProcessState.Success() {
		// 执行失败，返回错误信息
		return errors.New(errBuf.String())
	}
	return nil
}