Go 执行命令行并实时打印输出

func main(){
    makeCmd := exec.Command("make")
    PrintCmdOutput(makeCmd)
}

func PrintCmdOutput(cmd *exec.Cmd) {
    cmd.Stdin = os.Stdin

    var wg sync.WaitGroup
    wg.Add(2)
    //捕获标准输出
    stdout, err := cmd.StdoutPipe()
    if err != nil {
        fmt.Println("INFO:", err)
        os.Exit(1)
    }
    readout := bufio.NewReader(stdout)
    go func() {
        defer wg.Done()
        GetOutput(readout)
    }()

    //捕获标准错误
    stderr, err := cmd.StderrPipe()
    if err != nil {
        fmt.Println("ERROR:", err)
        os.Exit(1)
    }
    readerr := bufio.NewReader(stderr)
    go func() {
        defer wg.Done()
        GetOutput(readerr)
    }()

    //执行命令
    err = cmd.Run()
    if err != nil {
        return
    }
    wg.Wait()
}

func GetOutput(reader *bufio.Reader) {
    var sumOutput string //统计屏幕的全部输出内容
    outputBytes := make([]byte, 200)
    for {
        n, err := reader.Read(outputBytes) //获取屏幕的实时输出(并不是按照回车分割，所以要结合sumOutput)
        if err != nil {
            if err == io.EOF {
                break
            }
            fmt.Println(err)
            sumOutput += err.Error()
        }
        output := string(outputBytes[:n])
        fmt.Print(output) //输出屏幕内容
        sumOutput += output
    }
}

func main() {
    user := "root"
    host := "172.16.116.133"

    //获取执行命令
    cmd := exec.Command("ssh", fmt.Sprintf("%s@%s", user, host))
    cmd.Stdin = os.Stdin

    var wg sync.WaitGroup
    wg.Add(2)
    //捕获标准输出
    stdout, err := cmd.StdoutPipe()
    if err != nil {
        fmt.Println("ERROR:", err)
        os.Exit(1)
    }
    readout := bufio.NewReader(stdout)
    go func() {
        defer wg.Done()
        GetOutput(readout)
    }()

    //捕获标准错误
    stderr, err := cmd.StderrPipe()
    if err != nil {
        fmt.Println("ERROR:", err)
        os.Exit(1)
    }
    readerr := bufio.NewReader(stderr)
    go func() {
        defer wg.Done()
        GetOutput(readerr)
    }()

    //执行命令
    cmd.Run()
    wg.Wait()
    return
}
func GetOutput(reader *bufio.Reader) {
    var sumOutput string                //统计屏幕的全部输出内容
    outputBytes := make([]byte, 200)
    for {
        n, err := reader.Read(outputBytes)      //获取屏幕的实时输出(并不是按照回车分割，所以要结合sumOutput)
        if err != nil {
            if err == io.EOF {
                break
            }
            fmt.Println(err)
            sumOutput += err.Error()
        }
        output := string(outputBytes[:n])
        fmt.Print(output) //输出屏幕内容
        sumOutput += output
    }
    return
}

package main

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "os/exec"
    "strings"
    "sync"
    "time"
)

func main(){
    retryTimes := 3
    var retryInterval time.Duration = 3
    user := "root"
    host := "172.16.116.133"

    //部分场景下重试登录
    shouldRetry := true
    for i:=1;i<=retryTimes && shouldRetry;i++{
        //执行命令
        shouldRetry = RunSSHCommand(user,host)
        if !shouldRetry{
            return
        }
        time.Sleep(retryInterval * time.Second)
    }
    if shouldRetry{
        fmt.Println("\n失败,请重试或检查")
    }
}
func shouldRetryByOutput(output string)bool{
    if strings.Contains(output,"错误"){       //匹配到"错误"就重试.这里只是Demo，请根据实际情况设置。
        return true
    }
    return false
}
func GetAndFilterOutput(reader *bufio.Reader)(shouldRetry bool){
    var sumOutput string
    outputBytes:= make([]byte,200)
    for {
        n,err := reader.Read(outputBytes)
        if err!=nil{
            if err == io.EOF{
                break
            }
            fmt.Println(err)
            sumOutput += err.Error()
        }
        output := string(outputBytes[:n])
        fmt.Print(output)       //输出屏幕内容
        sumOutput += output
        if shouldRetryByOutput(output){
            shouldRetry = true
        }
    }
    if shouldRetryByOutput(sumOutput){
        shouldRetry = true
    }
    return
}
func RunSSHCommand(user,host string)(shouldRetry bool){
    //获取执行命令
    cmd := exec.Command("ssh",fmt.Sprintf("%s@%s",user,host))
    cmd.Stdin = os.Stdin

    var wg sync.WaitGroup
    wg.Add(2)
    //捕获标准输出
    stdout, err := cmd.StdoutPipe()
    if err != nil {
        fmt.Println("ERROR:",err)
        os.Exit(1)
    }
    readout := bufio.NewReader(stdout)
    go func() {
        defer wg.Done()
        shouldRetryTemp := GetAndFilterOutput(readout)
        if shouldRetryTemp{
            shouldRetry = true
        }
    }()

    //捕获标准错误
    stderr, err := cmd.StderrPipe()
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }
    readerr := bufio.NewReader(stderr)
    go func() {
        defer wg.Done()
        shouldRetryTemp := GetAndFilterOutput(readerr)
        if shouldRetryTemp{
            shouldRetry = true
        }
    }()

    //执行命令
    cmd.Run()
    wg.Wait()
    return
}